KlassKeeper – Installation, Operation, and Maintenance Manual
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© Copyright 2013 CGC Group Inc.
Last Revised April 2020 Installation, Operation, and Maintenance Manual is Subject to Change without Notice.
OPERATION
Inputs & Outputs
The KlassKeeper can be completely controlled by a BAS without a third party controller or a thermostat.
Modbus RTU is standard. BACnet gateway is optional.
The controller within the KlassKeeper heat pump controls the operation of the unit and has several sets
of inputs and outputs, both digital and analog. Their assignments are outlined below:
Digital Inputs
DI1 = Heat Call
DI2 = Cool Stage 1
DI3 = Cool Stage 2
DI4 = Fan Call
DI5 = ERV Call
DI6 = High Pressure Switch
DI7 = Low Pressure Switch
DI8 = Condensate Detector
Note: Inputs DI1 - DI5 are connected to dry-contacts on the third party controller or thermostat.
Analog Inputs
TH1 = Discharge Air Temperature – “TA”
TH2 = Refrigerant Temperature – “TR”
TH3 = Leaving Water Temperature – “TW”
TH4 = Exhaust Entering Air Temperature on ERV – “EX-EAT”
TH5 = Exhaust Leaving Air Temperature on ERV – “EX-LAT”
TH6 = Fresh Air Entering Temperature on ERV – “FRSH-EAT”
TH7 = Fresh Air Leaving Temperature on ERV – “FRSH-LAT”
TH8 = Mixed Air Temperature (Space Fresh Air Leaving) – “MIX-AT”
Note: All temperatures are measured using 10KΩ Type II thermistors.
Digital Outputs
K1 = Compressor Stage 2
K2 = Compressor Stage 1
K3 = Main Fan - Low Speed
K4 = Main Fan - High speed
K5 = ERV Fan
K6 = Cooling Valve
K7 = General Alarm Contact
K8 = ERV Heat wheel
Note: Outputs K2, and K7 are dry-contacts; K1, K3, K4, K5, K6, and K8 provide 24VAC.
Analog Outputs
AN1 = Alarm Flash Code Status Indicator (0-10VDC)
AN2 = Modulating Heat Valve (0-10VDC).
AN3 = DAT Setpoint Signal (0-10VDC). It scales DAT setpoint setting on screen to 0-10VDC where
0V= 50
o
F and 10V = 100
o
F