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101

Compressor thermomagnetic switch. Fan thermomagnetic switch. Pump thermomagnetic switch 

This warning appears if the contact of the thermomagnetic switch protecting the MTC compressor is opened.

102

Fan thermomagnetic switch.

This warning appears if the contact of the thermomagnetic switch protecting the MTV fan is opened. This code is displayed only if the card is used as a replacement for cards with SW up to version 3.6.

103

High pressure switch.

This warning does NOT indicate the status of the high pressure switch itself, but of the compressor contactor. The high pressure switch acts directly on the compressor contactor. If the card con-trols the switch-on of the compressor, and the contactor is not activated after 3 seconds, this signal appears. This alarm can also be caused by a defect in the functioning of the transmission system relay from the compressor contactor to the card (indicated as RAP in the wiring diagrams). If the contactor is deactivated while the com-pressor is functioning, this warning reappears. AP.

104

Flow switch. Water differential pressure switch.

This warning appears with the opening of the contact relating to the flow switch or to the differential pressure switch. This alarm is not detected in the first 40 seconds from when the pump is switched on. The machine goes into lockout when the maximum number of flow switch interventions allowed is exceeded. If frost protection mode (and therefore the pump too) is activated in standby, the flow switch status is also controlled. FL/PD. 

105

Low pressure switch.

This warning appears with the opening of the contact of the low pressure switch (intake on the compressor) BP.

106

 No water inlet probe.

This warning appears when the water inlet probe is disconnected.

107

 No water outlet probe.

This warning appears when the water outlet probe is disconnected.

108

 Water freeze.

This warning appears when the anti-freeze temperature threshold (installer menu, parameter (6) default: 3°C) of the outlet water is reached. The pre-alarm condition is removed when the outlet water temperature exceeds the setpoint calculated by the card on the basis of an internal algorithm; the anti-freeze alarm is suspended (in heat mode) for 3 seconds from when the compressor is switched on.

109

 No force probe.

This warning appears when the force gas probe is not detected.

110

High force gas temperature.

This warning appears when the force gas temperature (SGP probe) exceeds the threshold set in the parameter. The pre-alarm condition is removed with the factory-set temperature (default 125°C).

 

111

No compressor delivery pressure transducer.

This warning appears when the compressor delivery transducer is not detected and the machine is set in heat pump mode, or the presence of the DCP is set.

112

High pressure.

This warning appears when the transducer detects a delivery pressure greater than the set threshold (default: 40 bar). The pre-alarm condition is removed with the factory-set pressure (default: 38 bar).

113

No defrosting probe.

This warning appears when the defrosting probe is absent and the machine is set in heat pump mode.

114

No compressor suction pressure transducer.

This warning appears when the compressor suction transducer is absent and the machine is set in heat pump mode.

115

Low pressure.

This warning appears when the compressor delivery transducer detects a suction pressure lower than the factory-set threshold in cool mode (default: 4 bar), or in heat mode (default : 2 bar). The prealarm condition is removed when the suction pressure exceeds the envisaged intervention threshold (default equal to 2 bar). The low pressure alarm is suspended in heat mode for 3 seconds from when the compressor is switched on; it is permanently suspended during cycle reverse.

16

 Low output.

Whenever the machine is powered, the control checks the behavior of the compressor once only, via the output control procedure. This control can be deactivated by means of the dip-switch.

117

Pump thermomagnetic switch.

This warning appears if the contact of the thermomagnetic switch protecting the pump is opened. MTP. This code is displayed only if the card is used as a replacement for cards with SW up to version 3.6.

118

High pressure capacity control.

This warning appears whenever there is a capacity control due to the set threshold being reached. The machine goes into lockout when the maximum number of capacity controls allowed (default 5) is exceeded. With the inverter machine, it also indicates a capacity control due to a high compression ratio.

119

Low pressure capacity control.

This warning appears whenever there is a low pressure capacity control. The machine goes into lockout when the maximum number of capacity controls allowed (default 5) is exceeded.

120

Discharge temperature capacity control.

This warning appears whenever there is a discharge temperature capacity control. The machine goes into lockout when the maximum number of capacity controls allowed (default 5) is exceeded.

121

 Bemf error (chiller inverter) - error in the detection of the back emf.

This error is given by the inverter control card and is linked to compressor pickup current problems.

122

 Internal communication error.

The inverter control card has internal communication problems.

123

Overcurrent.

Excessive current absorption by the compressor.

124

No charge.

The compressor does not absorb enough current and may operate empty

125

Incorrect voltage.

The inverter control card indicates an incorrect BUS voltage.

126

 Start-up error.

The inverter control card indicates the incorrect start-up of the PMSM motor

127

IPM protection error.

Error on the IGBT.

128

EEPROM error.

Eeprom error on the inverter control card.

129

Compressor stalling.

130

No communication.

The inverter control card does not respond; it may not be powered, or the serial cable may be disconnected, or the A and B signals may be inverted.

131

PFC module.

Error in the PFC inverter module.

132

Excessive temperature of cooling blade.

 

133

Overcurrent in acceleration. Hardware error.

134

Overcurrent at constant speed.

Hardware error.

135

 Over-current in deceleration.

Hardware error.

136

Undervoltage on BUS DC.

137

 Overvoltage on BUS DC.

140

PFC Converter Fault Error in the PFC module.

Software error.

141

Overcurrent in acceleration.

Software error.

142

Overload.

143

Over-current at constant speed.

Software error.

144

Over-current in deceleration.

Software error.

145

Compressor not connected correctly.

146

No communication.

147

Error in cooling blade temperature sensor.

151

 Irregular condition. 

Frequency reduced by over-current or over-temperature protection.

154

Faulty reverse cycle valve.

The reverse cycle valve could be faulty or blocked. 

155

Input water high temperature.

The input water temperature has exceeded the value of installer menu parameter (H). There is probably a boiler in the same system. With the third pre-alarm intervention, the machine goes into lockout.

156

Cycle reverse due to high temperature of discharge gas. 

This pre-alarm indicates the intervention of a defrosting cycle due to cycle reverse, without respecting the cycle reverse times. The cycle reverse was prompted by the capacity control threshold being exceeded due to the high temperature of the discharge gas (default 130°). This pre-alarm does not cause the compressor to stop, and there is no maximum number of interventions.

157

Read error of the remote probe of the DHW panel.

This pre-alarm indicates a fault in the remote probe, or a problem in communication with the DHW panel. The alarm is only active if parameter (8)=4 in the menu with password = 30.

158

Read error of the outside air temperature probe.

This pre-alarm indicates a fault in the outside air temperature probe when the DCP is present, or when the machine is a heat pump.

ANK

The Moducontrol 4.2 service manual is available from Aermec. The Moducontrol manages the ANK series best when the various parameters remain as factory set points.

The updated replacement Moducontrol replaces all previous versions of the control. The new module must be addressed via the dipswitches and internal electronic switch according to the new revised manual. New Module Revision Number. Use New Manual. Any new features that are built into the new Moducontrol will automatically be part of the new control features added to that ANK unit. All Moducontrol switches are shipped in the off  position. Moducontrol dip switches and control parameters must be set and checked by the mechanic on site for each unit configuration.

Change menu functions by pressing the screwdriver symbol. Enter password 125 by using the arrow keys. Confirm password by pressing the screwdriver symbol again. The Moducontrol display will indicate # 0 or 1. Using the arrow up key scroll to position # 0. Using the screwdriver symbol enter the parameter. Existing parameter should read # 1. Change parameter by using the up arrow and toggle to # 0. Confirm the new setting by pressing the screwdriver symbol. Exit from program menu by pressing the textbook key.

Change menu functions by pressing the screwdriver symbol. Enter password 30 by using the arrow keys. Confirm password by pressing the screwdriver symbol again. The Moducontrol display will indicate # 0. Using the arrow up key scroll to position # 0. Using the screwdriver symbol enter the parameter. Existing parameter should read # 0. If not; change parameter by using the up arrow and toggle to # 0. Confirm the new setting by pressing the screwdriver symbol. Exit from program menu by pressing the textbook key.

Change menu functions by pressing the screwdriver symbol. Enter password 30 by using the arrow keys. Confirm password by pressing the screwdriver symbol again. The Moducontrol display will indicate # 0. Using the arrow up key scroll to position # 0. Using the screwdriver key enter the parameter. Existing parameter should read # 0. If not; change parameter by using the up arrow and toggle to # 0. Confirm the new setting by pressing screwdriver key. Exit from program menu by pressing the textbook key.

Press the on (1/2 green vertical line on full circle) for 3 seconds. The unit will begin to start if off. The On LED will be displayed.

If not check the following:

Change menu functions by pressing the screwdriver symbol. Enter password 30 by using the arrow keys. Confirm password by pressing the screwdriver symbol again. The Moducontrol display will indicate # 1. Using the arrow up key scroll to position # 9 PAN. Using the screwdriver key enter the parameter. Existing parameter should read # 3. if not; change parameter by using the up arrow and toggle to # 3. Confirm the new setting by pressing screwdriver key. Exit from program menu by pressing the textbook key. Switch on unit to start. Test by stopping and starting system by adjusting remote controls up or down.

Programming unit for remote control operation above configures this function. Using the remote controls switch from heating season to cooling season. Contact is in heating when open. The reversing valve is energized when closed. Contact is in cooling when closed.

Change menu functions by pressing the screwdriver symbol. Enter password 000 by using the arrow keys. Confirm password by pressing the screwdriver symbol again. The Moducontrol display will indicate # 1 Stf. Using the screwdriver key enter the parameter. Existing parameter should read # set temperature. Change parameter by using the up or down arrow and toggle to # new temperature. Confirm the new setting by pressing screwdriver key. Exit from program menu by pressing the textbook key.

Change menu functions by pressing the screwdriver symbol. Enter password 000 by using the arrow keys. Confirm password by pressing the screwdriver symbol again. The Moducontrol display will indicate # 2 bnf. Using the screwdriver key enter the parameter. Existing parameter should read # set differential. Change parameter by using the up or down arrow and toggle to # new differential. Confirm the new setting by pressing screwdriver key. Exit from program menu by pressing the textbook key.

Change menu functions by pressing the screwdriver symbol. Enter password 000 by using the arrow keys. Confirm password by pressing the screwdriver symbol again. The Moducontrol display will indicate # 0 Sta. Using the screwdriver key enter the parameter. Existing parameter should read # 0. Change parameter by using the up arrow and toggle to # 0. Confirm the new setting by pressing screwdriver key. Exit from program menu by pressing the textbook key.

Change menu functions by pressing the screwdriver symbol. Enter password 000 by using the arrow keys. Confirm password by pressing the screwdriver key again. The Moducontrol display will indicate # 0 Sta. Using the screwdriver key enter the parameter. Existing parameter should read # 1. Change parameter by using the up arrow and toggle to # 1. Confirm the new setting by pressing screwdriver key. Exit from program menu by pressing the textbook key.

Change menu functions by pressing the screwdriver symbol. Enter password 000 by using the arrow keys. Confirm password by pressing the screwdriver symbol again. The Moducontrol display will indicate # 3 StC. Using the screwdriver key enter the parameter. Existing parameter should read # set temperature. Change parameter by using the up or down arrow and toggle to # new temperature. Confirm the new setting by pressing screwdriver key. Exit from program menu by pressing the textbook key.

Factory Setting 45 deg.C. Radiant Heat  35 deg. C.,  Fan Coils, Radiators  45 deg. C. Others  55 deg. C.

Change menu functions by pressing the screwdriver symbol. Enter password 000 by using the arrow keys. Confirm password by pressing the screwdriver symbol again. The Moducontrol display will indicate # 4 bnc. Using the screwdriver key enter the parameter. Existing parameter should read # set differential. Change parameter by using the up or down arrow and toggle to # new differential. Confirm the new setting by pressing screwdriver key. Exit from program menu by pressing the textbook key.

The ANK Moducontrol has the ability to adjust the outlet water temperature being supplied to the building according to the changing outdoor temperature in both cooling and heating modes. The changes in water temperature are the inverse of the falling or rising outdoor temperature. Cooling and heating temperature compensation is available if the function is turned on. Change menu functions by pressing the screwdriver symbol. Enter password 000 by using the arrow keys. Confirm password by pressing the screwdriver key again. The Moducontrol display will indicate # 5 CSt. Using the screwdriver key enter the parameter. Existing parameter should read # 0. Change parameter by using the up arrow and toggle to # 1. Confirm the new setting by pressing screwdriver key Exit from program menu by pressing the textbook key. The 0 value turns the parameter Off. The 1 value turns the parameter On.

Change menu functions by pressing the screwdriver symbol. Enter password 030 by using the arrow keys. Confirm password by pressing the screwdriver symbol again. The Moducontrol display will indicate # 1. Using the arrow up key scroll to position # A ASA. Using the screwdriver key enter the parameter. Existing parameter should read # 1. Change parameter by using the up arrow and toggle to # 1. Confirm the new setting by pressing screwdriver key. Exit from program menu by pressing the textbook key.

Change menu functions by pressing the screwdriver symbol. Enter password 000 by using the arrow keys. Confirm password by pressing the screwdriver key again. The Moducontrol display will indicate # 1. Using the arrow up key scroll to position # E SAS. Using the screwdriver key the parameter. Existing parameter should read # set DHW temperature. Change parameter by using the up arrow and toggle to the new DHW temperature. Confirm the new setting by pressing screwdriver key. Exit from program menu by pressing the textbook key.

Change menu functions by pressing the screwdriver symbol. Enter password 333 by using the arrow keys. Confirm password by pressing the screwdriver key again. The Moducontrol display will indicate # 1. Using the arrow up key scroll to position # 3.  Using the screwdriver key enter the parameter. Existing parameter should read # 0. Change parameter by using the up arrow and toggle to # 1. Confirm the new setting by pressing screwdriver key. Exit from program menu by pressing the textbook key.

Change menu functions by pressing the screwdriver symbol. Enter password 333 by using the arrow keys. Confirm password by pressing the screwdriver symbol again. The Moducontrol display will indicate # 1. Using the arrow up key scroll to position # 3.  Using the screwdriver key enter the parameter. Existing parameter should read # 1. Change parameter by using the up arrow and toggle to # 0. Confirm the new setting by pressing screwdriver key. Exit from program menu by pressing the textbook key.

Change menu functions by pressing the screwdriver symbol. Enter password 000 by using the arrow keys. Confirm password by pressing the screwdriver key again. The Moducontrol display will indicate # 1. Using the arrow up key scroll to position # F bAS. Using the screwdriver key enter the parameter. Existing parameter should read # set differential. Change parameter by using the up arrow and toggle to the # new differential. Confirm the new setting by pressing screwdriver key. Exit from program menu by pressing the textbook key.

Change menu functions by pressing the screwdriver symbol. Enter password xxx  by using the arrow keys. Confirm password by pressing the screwdriver key again The Moducontrol display will indicate # 1. Using the arrow up key scroll to position # 8 r in. Using the screwdriver key enter the parameter. Existing parameter should read # 1. Change parameter by using the up arrow and toggle to the #2. Confirm the new setting by pressing the screwdriver key. Exit from program menu by pressing the textbook key.

Change menu functions by pressing the screwdriver symbol. Enter password 030 by using the arrow keys. Confirm password by pressing the screwdriver symbol again. The Moducontrol display will indicate # 1. Using the arrow up key scroll to position # 8 r in. Using the screwdriver key enter the parameter. Existing parameter should read # 0. Change parameter by using the up arrow and toggle to the # 2. Confirm the new setting by pressing screwdriver key. Exit from program menu by pressing the textbook key.

This error can occur when boiler is following ANK indoor outdoor reset parameters at ODT below 0 deg. C. Change menu functions by pressing the screwdriver symbol. Enter password 030 by using the arrow keys. Confirm password by pressing the screwdriver key again. The Moducontrol display will indicate # 1. Using the arrow up key scroll to position # H Ati. Using the screwdriver key enter the parameter. Existing parameter should read 65 deg. C. Change parameter by using the down arrow and toggle key to 50 deg.C. Confirm the new setting by pressing the screwdriver key. Exit from program menu by pressing the textbook key. Also check the design temperature boiler return (inlet) water setting. Set for 45 to 50 deg. C.

Change menu functions by pressing the screwdriver symbol. Enter password 030 by using the arrow keys. Confirm password by pressing the screwdriver key again. The Moducontrol display will indicate # 1. Using the arrow up key scroll to position # E bAF. Using the screwdriver key key enter the parameter. Existing parameter should read # 0. Change parameter by using the up arrow and toggle to the # 1. Confirm the new setting by pressing the screwdriver key. Exit from program menu by pressing the textbook key.

Change menu functions by pressing the screwdriver symbol. Enter password 030 by using the arrow keys. Confirm password by pressing the screwdriver symbol again. The Moducontrol display will indicate # 1. Using the arrow up key scroll to position # E bAF. Using the screwdriver key enter the parameter. Existing parameter should read # 0 seconds. Change parameter by using the up arrow and toggle to the new # of seconds required . Confirm the new setting by pressing screwdriver key. Exit from program menu by pressing the textbook key.

Turn power supply off to unit. Install the Modu485 card into the Moducontrol as described in the provided literature. Connect the shielded three wire 18 to 22 gauge communication cable between the building supplied BMS system and the Moducontrol. Using the installer menu Password 30 make sure parameters J Adi is set to 1, L bdi is set to 1, n Asi is set to 1. Check parameters with technician on site. Your BMS should have access to see and write to the displayed values. Your BMS should have access to up to 142 commands displayed. Some of the commands will not be applicable to your unit as this control is found in ANK's with optional built in features , ANL's, ANLi's, SRP units, etc. The most used commands are on/off (Off = 0, On = 1), heat or cool ( Cool = 0, heat =1) and alarm reset (alarm reset command 1 = reset). Set n Asi back to 0 when completed setup to avoid unintentional rewrites.

If the compressor breaker (MTC) trips the auxiliary switch opens causing the Moducontrol to Alarm. Some units will also alarm if a failure in the pump or fan circuits have a failure depending on the wiring version.

If the outdoor fan breaker (MTV) trips the auxiliary switch opens causing the Moducontrol to Alarm. Some units will also alarm if a failure in the pump occurs depending on wiring version. This feature was dropped after Moducontrol 3.6.

This alarm does not indicate the status of the actual high pressure switch but the status of the contactor. If the Moducontol signals the compressor to start the high pressure switch must be closed. If the pressure switch is open the contactor will not pickup; the alarm will trip in three (3) seconds. The HP alarm will also alarm if the compressor is running and the contactor is suddenly deactivated. A broken wire or loose contact in this circuit will also cause an alarm.

If the flow switch or differential switch opens the Moducontrol will alarm and stop the unit. On startup the Moducontrol will allow up to forty (40) seconds for the pump to establish flow before temporarily alarming. The unit will try to start until the number of interventions exceeds the maximum shut downs before going to a permanent alarm.

The low pressure alarm appears on the display when the low pressure switch contact opens due to drop in suction pressure at the inlet of the compressor.

 

If the inlet water sensor signal is lost this alarm will be displayed.

If the outlet water sensor signal is lost this alarm will be displayed.

This alarm is displayed when the outlet water temperature reaches three (3) degrees C. The pre-alarm condition is removed when the outlet temperature rises above a calculated setpoint algorithm. A three second startup delay is initiated when the outlet temperature is reached.

 

This warning is appears when the force gas probe is not detected due to poor connections or failure of probe.

SGP probe exceeds threshold set in parameter. Factory set temperature default is 125 deg. C. (257 deg. F.) . The compressor discharge temperature is to high, check refrigerant charge, TXV, superheat and operating limits.

Heat pump error when delivery pressure transducer signal is absent. Check wire to transducer and transducer. Also active if DCPx is not set correctly.

High pressure transducer detects high delivery pressure above 40 deg. C. (104 deg. F.).

 

Heat pump error when defrost transducer signal is absent. Check wire to transducer and defrost transducer.

 

Heat pump error when transducer signal is absent. Check wire to transducer and suction transducer.

Indicate low pressure below 4 bar ( 58 psig. ) in cooling mode or 2 bar (29 psig. )  in heating mode. Pre-alarm will reset when pressure exceeds set point by 2 bar (29 psig.) The low pressure alarm is bypassed for 3 seconds in heating mode and permanently bypassed from reverse cycle when compressor is switched on.

The Moducontrol checks the performance of the compressor performance once during the cycle. Performance is measured at 40 seconds from the start of the compressor. Parameter can be turned off by using #4 dipswitch on Moducontrol.

The Moducontrol indicates a tripped breaker (MTP) in the pump circuit. Check pump. Function deleted after version 3.6.

This error/alarm is not used anymore. The error occurs whenever the high pressure / capacity control transducer indicates a high pressure event. After five (5) prealarms the Moducontrol will lockout the unit.

This error/alarm is not used anymore. The error occurs whenever the low pressure/capacity control transducer indicates a low pressure event. After five (5) prealarms the Moducontrol will lockout the unit.

The error occurs whenever the discharge temperature / capacity control transducer indicates an event. After five (5 ) prealarms the Moducontrol will lockout the unit.

The compressor is drawing to much current either in starting up or running. Check voltage and current flow. Check capacitors, soft starter, wiring , compressor windings and contactor contacts.

The compressor is running with extremely low current and may not have enough refrigerant. Check refrigerant charge, superheat, and subcooling.

Check soft starter, capacitors, compressor windings, contactor, and wiring. Check voltage and amperage. Check condition of the condensing coil. Check for items limiting heat rejection.

The compressor is running with extremely low current and may not have enough refrigerant. Check refrigerant charge, superheat, and subcooling.

Check soft starter, capacitors, compressor windings, contactor, and wiring. Check voltage and amperage. Check condition of the condensing coil. Check for items limiting heat rejection.

Check soft starter, capacitors, compressor windings, contactor, and wiring. Check voltage and amperage. Check condition of the condensing coil. Check for items limiting heat rejection. Check refrigerant levels.

The reversing valve could be faulty or blocked. Check wiring and coil. Check valve to see if it is bypassing hot gas.

High temperature boiler water has entered the loop at a value above the set point entered into the moducontrol. See parameter H. Moducontrol will lock out system on the third occurrence.

The unit has gone into defrost without waiting for the correct time between defrosts to be completed. The capacity control threshold was terminated due to high discharge temperatures (130 deg. C.). This pre-alarm does not cause the system to stop and there is no limit to the number of interventions.

The DHW temperature probe has a fault. Check sensor and control wiring. This function is only active if parameter 8 = 4. Use password 30.

Alarm occurs if DCPX is present or unit is configured for heat pump mode. If an error exists with the outdoor temperature probe reading. Check wiring to sensor and sensor. Alarm occurs when DCPX and heat pump.

In order to reset an alarm you must push the red bell reset button until the small red alarm bell indicator disappears. Turning the unit disconnect or on off switch will not clear any alarms. Manual reset controls and breaker switches must be reset manually prior to using the reset button if tripped.

If the alarm has been caused by a safety switch which will automatically reset the BMS can reset the ANK Moducontrol. The BMS can reset an alarmed Moducontrol if the Serial Communication Protocol digital line 5 parameter 0 can be switched to 1. Manual reset controls and breaker switches must be reset manually prior to using the BMS in order to successfully start the unit.

The Moducontrol starts the outdoor fans a few seconds after the compressor starts and allows the fans to run to the end of the cooling or heating caller. The compressor stops and the fans continue to run for a few seconds afterword. Check the wiring connections at the MTA, Moducontrol ( M1S-1, M1-1), fan run capacitor and motor lead connections. Check fan, run capacitor with capacitor tester All fans are 230 volt single phase. Check the fan windings for short, open, or grounded conditions.

The Moducontrol shuts off the compressor and condenser fan motors when the defrost mode starts. The Moducontrol then stops the compressor and switches the position of the reversing valve to warm the outdoor coil. The compressor is then turned back on. The ice and frost build up on the outdoor coil melts and drains away. The Moducontrol then stops the compressor and switches the position of the reversing valve to the heating mode. The compressor resumes in the heating mode after the time delay is completed. The system water pump runs all the time through the defrost process.

The Moducontrol supplies 0 to 10 volts dc and 230 volts ac to the Penn P66AA-1C. The Speed Controller ramps up to 90 % of the normal fan speed for 7 seconds and then begins to modulate to the required speed. The Speed Controller provides power to the fan motor for as long as the cooling caller exists. As soon as the cooling caller is complete the Moducontrol stops the 0 to 10 vdc and line voltage  shutting off the fan motors several seconds later.  

Check the fan components and wiring as above. Check position of dipswitch # 7 on the Moducontrol. Switch # 7 must be On. The Moducontrol sends 0 to 10 vdc fro m M6-3 and M6-4 to E3 and E4 of the speed controller. The speed controller must have 24 volts at terminals E1 and E2 from an independent transformer. Speed controller terminal L receives power from the Moducontrol terminal M1S-1. Terminals L and M of the speed controller close to provide power to the fan motors.

The Moducontrol switch # 7 identifies the requirement for fan modulation and adjusts the speed accordingly in DHW mode. The Moducontrol also provides fan speed modulation for low temperature cooling and mild temperature heating callers as required.

Moducontrol dipswitch # 7 to on. Set parameter A to 1. Set parameter E to 1. Set parameter F is set between 60 and 300 seconds depending on the time required to open the three way valve. The TWS switch automatically overrides the space heating controls to provide hot water. Please Note installer level index 0 parameter iu must be set to 2. Domestic hot water heating is only possible if a remote storage temperature sensor, 3-way valve, domestic hot water storage tank and DCPX-Penn Johnson control have been installed. Please note installer level index 0 parameter iu must be set to 2. The compressor is turned off for 5 minutes when shifting from space conditioning to DHW heating. On completion of the DHW command the compressor will shut off for 5 minutes before returning to addressing the space conditioning requirements.

The SAGInoMIYA RGE pressure actuated speed controller can be used on ANK series units designated as chillers only. The Johnson Controls P66AA-1C speed controller is approved for chillers and heat pumps. It is necessary for Domestic Hot Water Production (DHW). Required for Cooling Operation below 20 Deg. C. Required for mild weather space heating and DHW production. 

The production of hot water can be handled in two different ways. Integrated and free standing. The most common method is to integrate the process completely into the ANK control system.

(1) Integrated Operation

The DHW thermostat sensor is to be installed into the storage tank. The control wires from the DHW thermostat send a signal to a three way diverting valve to switch position and change the flow of the water from the space heating and cooling circuit to the DHW  storage tank circuit.  When the end switch (dry contacts) on the 3 way diverting valve closes the ANK terminals T-10 and T-11 indicate to the Moducontrol that DHW has priority over all other operations. The ANK will start up and continue to heat DHW until the DHW thermostat sensor is satisfied at which time the diverting valve will return to heating or cooling the space as the end switch opens. As soon as the end switch opens  the ANK resumes control of the space conditions. In order to heat domestic hot water the ANK series units must be fitted with  an outdoor fan speed controller to eliminate nuisance high pressure cutouts during the summer months.

The set up of an ANK for domestic hot water production requires the following changes to the unit to be made prior to start-up:

1. Install DCPX control as per distributors suggested instructions2. Switch Moducontrol switch position 7 to on3. Change Moducontrol programming for flow switch bypass4. Set password 30 parameter A to 15. Set password 30 parameter E to 1 6. Set password F to 180 seconds. To allow valve to fully open before Domestic hot water production starts7. Set domestic hot water temperature as required. Lowest DHW  temperature below 50 deg. C. acceptable by client works best

(2) Stand-a-Lone Operation
In this mode the ANK does not take over the full heating control of the domestic hot water operation. The heating of the storage tank is completed in two stages as the ANK preheats the incoming wiring and a secondary water heater (electric or gas) completes the process. The on board storage tank thermostat is used as a second stage heating control is separate from the ANK system and allows for an independent heating of the DHW in the event stage one heating is not active. Terminals T-12 and T-13 are not connected in this scenario.

Install the DCPX control to manage the heat rejection from the ANK to the DHW system as the tank comes up to temperature.

Spring maintenance. Make sure the outdoor condenser coil has been cleaned with a soft water spray.

Set the maximum hot water temperature not to exceed 50 Deg. C. or 131 Deg. F.  (Factory max. 60 deg. C or 140 Deg. F.).

Set timing for the heat pump to start heating DHW after the diverting valve has fully opened. (Change password 30 parameter E to 1. Change password 30 parameter F to 180 sec).

Check piping system for partially closed valves or trapped air. Make sure circulation pump is free of air and is running.

On units equipped with a circulation pump the Moducontrol starts the circulation pump a few seconds after the cooling, heating or DHW caller is recognized. The pump continues to run as long as the Moducontrol receives a demand call.

Check the wiring connections at the MTA, Moducontrol (M1S-2, M1-2) and pump motor lead connections (wires 9 and 13). All pumps are 230 volts single phase. Check the pump windings for short, open, or grounded conditions. Remove the center cap on the pump. Using a screwdriver turn the pump shaft to test the tightness of the bearing. Pump should spin freely. Turn pump shaft several turns. Reinstall cap. Bleed air. Start and test. Check for closed valves in return or supply water.

Pump motor has 230 volts. Current is not measurable. Pump motor has impedance shunt to eliminate motor burnout. No rotation. Place compass on motor shaft. Observe rotation. None. Flow switch open. Replace pump assembly.

Check the pump for air. Loosen the center cap 1/4 turn to vent any air in the pump. Use the air vent bleed cap on the side unit to vent any air at the top of the evaporator waterside inlet. If the unit is equipped with a storage tank vent the expansion tank at the air vent mounted on the tank. Check the water pressure in the system. Minimum operating pressure is 1.5 bar or 21 psig. Vent the remainder of the high points in the system for air.

Isolate outdoor unit. Relieve water pressure to zero. Turn off electricity. Disassemble pump. Look for broken impeller, worn impeller or out of balance impeller. Look for dirt build-up on internal surfaces. Clean or replace components if necessary. Reassemble pump. Start and test.

 

Check all isolating, modulating, switchover, and branch valves to make sure they are open. Check filter to make sure it is not plugged.

 

Check all isolating, modulating, switchover, and branch valves to make sure they are open. Check filter to make sure it is not plugged.

 

Check all isolating, modulating, switchover, and branch valves to make sure they are open. Check filter to make sure it is not plugged.

 

 

Check all isolating, modulating, switchover, and branch valves to make sure they are open. Check filter to make sure it is not plugged.

 

The minimum pipe size recommended by the manufacturer is 1.25 " inside free cross sectional area for all ANK units. System that share multiple units on a common supply or return must have an equivalent inside free cross sectional area to maintain the flow of water to all units without an excessive pressure drop.

Chillers require slightly less water circulation than heat pumps. The required water flow rate is higher for heat pumps due to the need to complete a successful defrost cycle in the heating mode.

 

 

 

 

Model

Cooling GPM

 Heating GPM

ANK030

7

8

ANK045

9

12

ANK050

11

13

 

 

 

 

The recommended volume of stored water is 10 liters per kilowatt ( or 9.3 gal/ton) in order for the ANK series unit to work properly. The minimum value is 4 liters per kilowatt.

 

 

 

 


Model

Normal Capacity

 Factory Tank

Min Clg. Content

ANK030

2.51 T

26 Gal

23 Gal

ANK045

3.35 T

36 Gal

31 Gal

ANK050

4.02 T

36 Gal

37 Gal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


 

 

 

 

 

 

 

 

 

 

 

The maximum stored water content is determine by the size of the expansion tank that has been installed.  The system can operate with  between 4 and 10 liters per kilowatt. If the stored water content is greater than 10 liters per kilowatt a larger expansion tank will be required. Higher stored water content improves winter defrost operation.

The expansion tank is factory charged at 1.5 bar when empty. It can be charged with a maximum of up to a 6 bar. The formula is:

bar = 14.5 psig

P (Bar) = H (m) / 10.2 + 0.3 or P (psig) = H (ft) / 0.433

Charge vessel to calculated pressure before installing water/glycol mixture to loop.

Glycol mixtures provide valuable inhibiters to extend the life of the system as well as providing freeze protection. Glycol reduces the heat transfer characteristics of the system. The lowest amount of inhibited glycol that provides freeze protection is the correct % level.

Glycol / water mixtures are required in all systems where the exposes exterior piping inside and outside the unit experience outdoor design temperatures below the freezing point of water. Glycol must have a minimum percentage of 20% glycol mixture to avoid the possibility of algae formation inside the piping system. the operating mixture percentage of the glycol / water mixture is dependent on the outdoor temperature to be experienced in the area of installation. See the glycol's manufactures instructions for the correct mixture levels.

Glycol / water fluid mixtures generally contain inhibitors that protect the inside of the piping system from corrosion caused by electrolysis. As well small dirt or rust particles may be kept in suspension longer until captured by the in-line filter which will reduce maintenance issues. The effective cooling range may be adjusted slightly lower by reducing the loop temperature if required in some systems. All chillers and heat pumps that are exposed to outdoor temperature below the freezing point (32 Deg. F. or 0 Deg. C.) all require treatment with glycol additives.

Each system will require a different amount of glycol due to the varying amounts of circulated fluid as the loop changes in size, the amount of stored water and local weather conditions. The amount of glycol required will be based on a percentage of glycol versus water content in the loop. Each manufacturer will publish a supporting document for their product.

Example glycol performance chart:

 

 

 


Outdoor Temperature

Ethylene % of Glycol Required

Propylene % of Glycol Required

C.

F.

 

 

0

32

0%

0%

-5

20

18%

18%

-12

10

24%

29%

-18

0

32%

36%

-23

-10

39%

42%

-29

-20

44%

47%

-34

-30

48%

52%

 

 

 

 

Many brands of glycol products exist across the country which will meet or exceed Aermec's specifications. You should consider inhibited products, and non toxic products with a long life cycle.

The maximum height difference is  a function of pressure contained within the loop and the density of the loop water / glycol mixture. The maximum pressure in the loop is defined by the rested operating pressure of the installed equipment at the bottom of the loop below the chiller. You cannot exceed 50 meters or 165 ft.

The maximum stored water content is determined by the size of the expansion tank that has been installed. The system an operate with between 4 and 10 liters per kilowatt. If the stored water content is greater than 10 liters per kilowatt a larger expansion tank will be required. Higher stored water content improves winter defrost operation.

The information can be accessed only by properly identifying the unit. The full Aermec model number, serial number, and comm. Numbers are required to identify wiring and components. Communications between the distributor and service mechanics can be made by contacting us at the following telephone or e-mail addresses.

 

1-905-564-2221 Head Office

   

 

 

www.aermec.ca

1-800-564-2221 Canada

     

 

 

help@aermec.ca

1-888-564-2227 USA

           

help@aermec.us

1-905-564-2205 Fax.

           

www.aermec.us

Monday To Friday - 8:00 Am Est To 5:00 Est.

       

 

 

 

 

 

 

The GR03/GR3 controller user manual can be used to set up all stand-alone and BMS installations which will operate with standard environmental conditions. Do not attempt to adjust the control parameters without having read and understood the manual. The NRL unit arrives with a basic operating program ready to start up as soon as the building utilities are completed. The GR3 user manual allows you to understand the basic functions and set points required to operate the system. For more complex systems the GR3 after service manual is available to provide additional information. In the interest of brevity the GR03/GR3 may be described as GR3 where it is appropriate.

The Aermec GR3 user manual can be downloaded at Aermec.us. The Aermec after sales service manual can be downloaded from Aermec.us

The GR3/GR03 service information can be found in the GR3 after sales service manual in two parts the first 115 pages describe the setup for r-407c, the remaining pages describe the GR3 parameters for r-410a.

 

The GR03/GR3 control system consists of two components which are the GR03 display screen touchpad and the GR3 control module. All changes to the factory set operating parameters are completed by configuring the two sets of dipswitches and installing set of terminal jumpers (bridges). Then the soft valves can be inputted into the controller through the GR03 display screen pad. NRL systems that are to be monitored by a BMS can also be modified remotely by a computer if the appropriate switches and jumpers have been installed. These setting checks and adjustments are considered to be part of the basic start-up procedure.

Power up the line voltage wiring 24 hours before start up to allow the oil to warm up and drive off any refrigerant in the compressor oil. In the event line voltage power is off for any length of time during the unit’s normal service life (for more than four hours) allow the unit to warm up the oil for 1/2 hour for each hour off line.

Refer to Aermec chiller start up procedure form doc. 061103. Make sure all hydronic, electrical and refrigerant checks have been completed. Check to make sure the hydronic system is pressorized to 1.5 bar (21 PSIG) and that all isolating valves are fully open between the unit and load.

If a remote pumping station is used.  Make sure that the pump is on and rotating in the correct direction to pump water through the system. Water flow must be established.

 

Using the local / remote switch toggle to the local position. The green led light will turn on. Using the mode button toggle the switch to heat or cool as required. The green led will turn on and indicate the working mode. Push the start button on the GR03 display keypad for five (5) seconds. The led will come on and indicate the new unit status. The unit will begin to start up if in local mode and no accessory controls have been added.

Optional controls include the pr3, the PRD1, supernode / BMS with accessories, microchiller / BMS with accessories and multichiller/ BMS with accessories. NRL units equipped with BMS controls must be switched from local to remote after startup for the first time.

 

Push the alarm button (red bell) once to see the latest error code.

Record same push the alarm button (red bell) again to see 2nd last error code.

Record same scroll through historical listed error codes.

 

(CP1 power, CP1A power, CP1B power, CP2 power, CP2A power, CP2B power)

Parameters CP1 power to CP2B power (up to 6 steps) can be used to shut down an individual compressor requiring service or for reasons. The compressors % of load number must be changed to zero. The GR3 will not look for the compressor which has a 0 % service value set into this function. All general and safety controls directly related to this specific compressor only will be overlooked. All other compressors showing a unit % will run and operate as needed.  Upon completion of the service for the compressor requiring shut down return the power parameter % to its normal value. The compressor will start up in the next cycle.       

 

(CP1, CP1A,CP1B, CP2. CP2A, CP2B, 111111)

Parameters CP1 to CP2B (up to 6 steps) can be used to shut down an individual compressor requiring shut down for load shedding purposes. Each compressor up six is identified by a 1 in the number string 111111. The individual compressor will not start up if its identifier has been switched to 0 unless contact m11 3-4 is closed. If the remote contact m11 3-4 is open all other compressors identified by 1 will operate. This parameter is useful when starting compressors during the service checks.

 

(MP1, MP1A, MP1B, MP2, MP2A, MP2B, RMV1, RMV2)

If any of the compressor protection (wired in series) devices trip the safety circuits M9.1 to M9.2 or M12.1 to M12.2 is opened shutting down the NRL circuit completely. A solution is to disconnect the defective compressor or control electrically. Install a jumper on the overload or relay control contacts. All other unit functions should be operational.

 

(MT(V)1, MT(V)1A, MT(V)1B, MT(V)2, MT(V)2A, MT(V)2B, RMV1, RMV2)

If any of the fan protection (wired in series) devices trip the safety circuits M9.1 to M9.2 or M12.1 to M12.2 is opened a solution is to disconnect the defective motor or control electrically. Install a jumper on the overload or relay control contacts. Seal off the fan opening with a sheet of plastic. Reset the GR3 the NRL should start up with one fan disengaged. All other unit functions should be operational.

 

All 60 cycle NRL's are equipped with an AP (HP) transducer which provides an analogue signal to the gr3 controller. The trip point for the AP (HP) transducer can be adjusted from downward from 39 bar (566 PSIG). To suit site conditions. The manual AP (HP) reset control cuts out at 41 bar (595 PSIG) and must be physically reset.

 

The hot gas temperature (HGT) cut-out switch is mounted on the discharge line. It will trip if the HGT exceeds 135 deg. C. (275 deg. F.) On earlier models the hot gas temperature switch (HGT) was wired directly in series with the manual high pressure relay contacts rap1. On later models the wiring has been moved to be in series with the compressor motor contactor will show up on the wiring diagram but not on the gr3 display as being tripped. The HGT differential is 20 degrees Celsius before automatically resetting.

All 60 cycle NRL's are equipped with a BP (LP) transducer which provides an analogue signal to the GR3 controller. The manual low pressure switch is optional.

 

Chillers, free cooling units, heat pumps

The low pressure and high pressure transducers can be removed from the system without removing the charge from the system as they are fitted with a schraeder check fitting. Units that are fitted with a low pressure switch from the factory are also equipped with a schraeder check valve. By code the manual high pressure switch is not fitted with a schraeder check valve. See below for further details on changing the AP (HP).

 

Chillers and free cooling units only, not for heat pumps

Close the liquid line valve. Pump down the compressor section. Close the hot gas line. Reclaim the refrigerant trapped between the evaporator and hot gas line by accessing the schraeder valve in the hot gas line. Make the repairs. Pressure test. Evacuate the compressor section. Add a small charge of refrigerant to raise the pressure to one or two lbs. Open up the closed valves. Start the system. Check the refrigerant charge.

 

Heat pump units do not have isolating valves at the hot gas and liquid lines. Therefore any repairs on the refrigerant circuit at the compressor will require all of the refrigerant to be removed from the unit.

 

Chillers and free cooling units only, not for heat pumps depending on the model of the NRL the liquid line and discharge lines are equipped with isolating valves. The liquid line valve can be closed, the compressor section can be pumped down to one or two pounds, the hot gas line valve can be closed. The remaining refrigerant pressure can be vented / reclaimed. The compressor is fitted with an oil siphon line that can be used to remove the oil. The new oil is to be recharged to the required sight glass level.  Evacuate the compressor section. Add a small charge of refrigerant to raise the pressure to one or two lbs. Open up the isolating valves and restart the unit.

Depending on the size of the NRL the liquid line and discharge lines are equipped with isolating valves. The liquid line valve can be closed, the compressor section can be pumped down to one or two pounds, the hot gas line valve can be closed. The remaining refrigerant pressure can be vented. The compressor repairs can be made as per good refrigerant practice. Evacuate the compressor section add a small charge of refrigerant to raise the pressure to one or two lbs.  Open up the isolating valves and restart the unit.

Chillers, free cooling units, heat pumps

Depending on the model of the NRL the liquid line and discharge lines are equipped with isolating valves. The liquid line the refrigerant charge must be completely replaced along with the liquid line filters in the case of a burnout. All of the oil in the unaffected compressors must be changed as well. 

 

Chillers, free cooling, heat pumps

The factory approved repair is to replace the defective compressor only. The liquid line filters and oil will need to be replaced as required by the acid test.

 

The AP (HP) transducer is factory set to 39 bar (565 PSIG). The manual AP (HP) manual reset switch is set for 42 bar (609 PSIG). The AP (HP) relief valve is set to release refrigerant at 45 bar (652 PSIG). It is possible that the unit will totally shut down on (609 PSIG) the manual AP HP) switch. In order to avoid this situation and keep as much of the system running as long as possible in an AP (HP) situation the press f. Parameter in the gr3 control can be adjusted to shut down one compressor in a tandem circuit. If the AP (HP) pressure continues to rise the second compressor in the circuit will be shut down. If the AP (HP) condition remains the transducer will shut off the last compressor on the third (3) occurrence. If the AP (HP) transducer does not shut down the compressors; the manual AP (HP) switch will trip at 41 bar (609 PSIG). Shutting down the circuit permanently. The pre-alarm changes to a permanent AP (HP) alarm after three pre-alarms have occurred. This AP (HP) transducer adjustment will allow you to run the affected NRL circuit in a reduced capacity until the problem is resolved permanently. On start-ups we now recommend setting the parameter press f. To 32 bar when setting up the unit for the first (1) time.

Chillers, free cooling, heat pumps. 2 circuits up to 3 compressors per unit.

The press f. Parameter can also be used on units with as few as 2 compressors. The transducer will shut off one compressor.  Wait 5 minutes (time out). Then the GR3 will turn the compressor back on. If the AP (HP) problem has been resolved the GR3 will allow the NRL to run. The NRL will shut down permanently if the allowable three (3) pre-alarm intervention number has been exceeded. If not the GR3 will allow the NRL to start up and run.

 

GR3 test procedure:

 

      1. Switch off the power to the unit

      2. Change the position of the sw2 dip switch # 4 to on.

      3. Change the position of the display dip switch 1 to 8 as follows on off on off on off on off.

      4. Turn the power supply back on.

      5. The two led's beside the dip switches should indicate a

      6. Yellow flashing heart beat gr3 board is powered on

      7. Red flash communication error between gr3 and gro3 display.  On a start up for a few seconds

Answer the following questions after power up by using the up and down arrows for yes and no

 

      1. Reset alarms recorded

      2. Reset default parameters

      3. Hardware test

 

Chillers and free cooling units only, not for heat pumps    

Depending on the size of the NRL the liquid line and discharge lines are equipped with isolating valves. The liquid line valve can be closed, the compressor section can be pumped down to one or two pounds, the hot gas line valve can be closed. The remaining refrigerant pressure can be vented. The compressor is fitted with an oil siphon line that can be used to remove the oil.  The new oil is to be recharged to the required sight glass level. Evacuate the compressor section. Add a small charge of refrigerant to raise the pressure to one or two lbs. Open up the isolating valves and restart the unit.

 

Chillers, free cooling, heat pumps

The factory approved repair is to replace the defective compressor only. The liquid line filters and oil will need to be replaced as required by the acid test.

 

We use 2 heater of the code 6406802 in each plate. Each are 150W and 230V.

 

AN

 

To turn the unit on for the first time push the up button (*sun) and hold for 5 seconds. The sun indicator will light up. The AN unit will come on in heating and operate to the preset factory parameters.

 

 

To turn the unit on for the first time push the up button (*snowflake) and hold for 5 seconds. The snowflake indicator will light up. The AN unit will come on in cooling and operate to the factory pre-set factory parameters.

 

 

To turn the unit off in heating mode push the up button (*sun) and hold for 5 seconds. Indicator lamp will go off. AN unit is off.

 

 

To turn the unit off in cooling mode push the up button (*snowflake) and hold for 5 seconds. Indicator lamp will go off. AN unit is off.

 

 

You must turn the operating cycle off by pushing the operating mode button (up arrow or down arrow) for 5 seconds until the unit has stopped. The unit is now in standby mode. Wait for five seconds and then press the desired mode button for 5 seconds. The unit must be put into standby manually before you can start in the opposite mode. The AN unit indicator will come within 5 minutes.

 

To reset an Alarm press the up and down arrow buttons simultaneously for 5 seconds. If the alarm has been manually or automatically reset the red indicator bell LED will go out. Press the clear button on the PRD1 for 5 seconds if installed.

 

 

To start a defrost test you must block off the condenser coil with a plastic sheet and allow the unit to run in heating for at least 5 minutes. Then press the SEL and Up arrow buttons simultaneously for 5 second. The unit will go into defrost if are the values at the end of the defrost will be lower than the values set in the microchiller for the end of the defrost. If unit temp and press conditions permit.

 

 

Press and hold the Prg. button at the microchiller electrical power-up. When the procedure is over the display will show dF.

Install dry contact relays and wiring to engage the AN unit ON/OFF 1A switch. Set the microchiller 2 parameters to switch from standalone to BMS operation. The closed 1A On / Off switch starts the AN circulating pump and the pump LED indicator. The flow switch closes. The microchiller 2 checks the safety controls. Compressor delay timer engages and starts countdown. The # 1 LED will start to flash indicating the compressor is going to start. If all the safeties are closed the compressor will start within 5 minutes. The compressor and associated LED indicator lights up. When the inlet water temperature reaches it set point the microchiller 2 will shut off the compressor. If the BMS is satisfied with the building conditions the microchiller control will shut down the compressor and the circulating pump.

IEC

The ASHRAE 9.9 A1-A4 envelope and the climate profile of Heathrow in UK. The IEC (AERIS) is managing dynamically the air temperature to the Data Hall in order to save as much energy as possible.

 

 

The PUE being the ratio of: the IT load and all the energy spent to run the data center (which includes: IT energy load, input energy of the cooling system, input energy for lights and all the other input energy) divided the IT energy load, can be calculated in many ways annually quarterly daily etc. We properly call it pPUE (Partial PUE) as we are able to calculate the input and output energy of the system we provide and not for all the components of the data hall. Thus the IT load energy and input power of units we supply all divided by the IT energy load.

 

Yes. The system design needs to be looked at in order to define where to position them.

 

The main maintenance refers to the water system, thus it depends on the climate profile and water consumption. Some installations do not require filtration on the unit as they have central watering system. Furthermore, the water treatment is an issue that has to be in compliance with the standard of the country or area where the IEC is installed. It is extremely easy to replace filters and check the water injection on the unit. Concerning the redundancy, it depends from the data center owner, as they usually provide guidelines to the consultant. Usually for 1 MW data centre we have an N=6+1 or 6+2.

 

Under a certain ambient temperature (approx. 10°C) the water system is automatically drained in order to prevent freezing.

 

The condenser is placed in the external air stream after the cross heat exchanger. No additional fans are required.

 

Aermec is one of the few companies in the market to be Eurovent certified. In particular we are L1 certified. The IEC are certified as Eurovent L1 class (0,44 l/s*m2 with -400 Pa pressure) and (0,63 l/s*m2 with +700 Pa pressure) The certified lab: TÜV Germany.

 

Yes it is no problem in our options. We can add a water cooling coil.

 

The minimum space around the unit is 1.5m but in some special applications we can duct the air discharge or we can design a unit with top air discharge.

Since the clearance for each unit is 1.5m therefore it is 3m between 2 units. This clearance can be reduced to 2m using baffles on the discharge wall. The 2m are also necessary for the maintenance operation.

 

As every installation is different in terms of discharge air, DX operation, water recirculation, etc. It is very difficult to have a side by side comparison. These units are tailored made for every specific installation.

 

With a system with chillers and crac units.

 

No. One board is in the chiller and one board per CRAC. The controllers are a kind of PLC and the connections is with RS485 cable (twisted pair shielded cable). Bacnet is available on the chillers but the DSP is controlled by the main board of the chiller with the AERSET EVO.

 

We can restart at full load in 2 min. (HOT RESTART FULL LOAD). We are never in economizing. Hot restart is in case of power failure.

 

We modify the water out of the chillers based on the data hall load.

 

Reliability is very high and it is connected to the redundancy as well.

 

We are use Bitzer compressors for the screw chillers and Copeland scroll compressors which are all available in the US market.

 

NRP

You need to connect the two unit controllers (PCO3) in Plan network so it is necessary to connect the two Pco3- terminals J11

 

Then there is also the microPC cards and on B3 (MASTER) plant common leaving water temperature, connect the common temperature probe (NTC10 kohm) and enable it on parameter H24 B3=Y.

 

 

SETTINGS ON MASTER unit (example of version 4 pipes like NRP0750E4….)

on menu PLANT CONFIGURATION the parameter H42 you select the MASTER or SLAVE configuration.

On parameter H45 you select the STEP parameter (how to control the two units). For istance setting step=1 the two machines are in parallel but selecting 100% for instance they are in cascade. On parameter H48 you can select (in case the water pumps are on board) when to stop the SLAVE water pumps (no request pumps off)

The B4 on last NRPs where there are two exchangers on recovery side, one per circuit, is already installed but must be remoted on common heating leaving water pipe.

When there is the 2 pipes type NRP0750E2….

   

 

You have this setting on parameter Q3 (setting temperature control on buffer tank, placing the B5 there and enabling B5 on parameter H24) plus the parameter Q21 where you fix the setpoint on unit outlet side (B4)