Heat Controller HTD CXM Control Start-up Operation, Unit Operation Stat signal, ECM fan PSC fan

Installation, Operation & Maintenance HTV/HTD/HTH SERIES Heat Controller, Inc.

CXM Controls

CXM Control Start-up Operation

The control will not operate until all inputs and safety controls are checked for normal conditions. The compressor will have a

5 minute anti-short cycle delay at power-up. The first time after power-up that there is a call for compressor, the compressor will follow a 5 to 80 second random start delay. After the random start delay and anti-short cycle delay, the compressor relay will be energized. On all subsequent compressor calls, the random start delay is omitted.

Table 6b: Unit Operation
T-stat signal	HTT	TS	TS
	ECM fan	ECM fan	PSC fan
G	Fan only	Fan only	Fan only
G, Y or Y1	Stage 1 heating1	Stage 1 heating3	Stage 1 heating5
G, Y1, Y2	Stage 2 heating1	Stage 2 heating3	Stage 2 heating5
G, Y1, Y2, W	Stage 3 heating1	Stage 3 heating3	N/A
G, W	Emergency heat	Emergency heat	Emergency heat
G, Y or Y1, O	Stage 1 cooling2	Stage 1 cooling4	Cooling6
G, Y1, Y2, O	Stage 2 cooling2	Stage 2 cooling4	N/A

1Stage 1 = 1st stage compressor, 1st stage fan operation Stage 2 = 2nd stage compressor, 2nd stage fan operation Stage 3 = 2nd stage compressor, auxiliary electric heat, 2nd or 3rd stage fan operation (depending on fan settings)

2Stage 1 = 1st stage compressor, 1st stage fan operation, reversing valve Stage 2 = 2nd stage compressor, 2nd stage fan operation, reversing valve

3Stage 1 = compressor, 1st stage fan operation Stage 2 = compressor, 2nd stage fan operation

Stage 3 = compressor, auxiliary electric heat, 2nd or 3rd stage fan operation (depending on fan settings)

4Stage 1 = compressor, 1st stage fan operation, reversing valve Stage 2 = compressor, 2nd stage fan operation, reversing valve

5Stage 1 = compressor, fan

Stage 2 = compressor, auxiliary electric heat, fan

6Cooling = compressor, fan, reversing valve

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