VMILF10214 – Danfoss
Relay24VAC,DO2:Signaltoreversingvalveagainstcoolingagentreturn(activecold)
Relay24VAC,DO3:Signaltocoolantcoolercirculationpump
Relay24VAC,DO4:Signaltoreversingvalve,surplusheat
Relay24VAC,DO5:Signaltocoolingcircuitcirculationpump
Transmitter, cooling tank
• ConnecttoT1andGND
Transmitter, coolant cooler
• ConnecttoT2andGND
Transmitter, cooling tank outlet
• ConnecttoT3andGND
Transmitter, cooling circuit
• ConnecttoT4andGND
Dew point sensor
• Connect to 24 VAC 2.1 and 24 VAC 2.2
• ConnectroomtemperaturesensortoAI1andGND
• ConnectrelativeairhumiditysensortoAI2andGND
Pilot valve, cooling circuit
• ConnectAO1tothesignalinputofthepilotvalve
• ConnectGNDtopilotvalveGND
• ConnectthepilotvalveterminalGto24VAC2.1
• ConnectthepilotvalveterminalG0to24VAC2.2
Cooling fans
• ConnectAO2tothesignalinputofthecoolingfan
• ConnectGNDtothecoolingfanGND
Voltage feed to DO output terminals
• Connect 24 VAC to 24 VAC 2.1
• ConnectG0to24VAC2.2
Reversing valve, cooling tank
• ConnectstartrelaytoDO1andG0
Reversing valve, cooling agent return
• ConnectstartrelaytoDO2andG0
Circulation pump, coolant cooler
• ConnectstartrelaytoDO3andG0
Reversing valve, surplus heat
• ConnectstartrelaytoDO4andG0
Circulation pump, cooling circuit
• ConnectstartrelaytoDO5andG0
Alternative connection of reversing valves:
Whenconstantvoltagefeedtoareversalvalve’s2-point24VACadjusterisrequired,establishdirectconnectionto24VAC
2.1and24VAC2.2.Astartrelayisnotnecessarywhenusinga2-point24VACactuator.
Connectthecontrolsignaltothecorrespondingdigitaloutputterminal,DO1,DO2orDO4.