R e s i d e n t i a l H & V - 6 0 H z H F C - 4 1 0 A :
R e v : O c t o b e r 5 , 2 0 2 1
36
G e o t h e r m a l H e a t i n g a n d Co o l i n g
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
Safety Features - CXM Controls
T-stat signal
TS
TS
ECM fan
PSC fan
G
Fan only
Fan only
G, Y or Y1
Stage 1 heating
3
Stage 1 heating
5
G, Y1, Y2
Stage 2 heating
3
Stage 2 heating
5
G, Y1, Y2, W
Stage 3 heating
3
N/A
G, W
Emergency heat
Emergency heat
G, Y or Y1, O
Stage 1 cooling
4
Cooling
6
G, Y1, Y2, O
Stage 2 cooling
4
N/A
1 Stage 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)
2 Stage 1 = 1st stage compressor, 1st stage fan operation, reversing valve
Stage 2 = 2nd stage compressor, 2nd stage fan operation, reversing valve
3 Stage 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)
4 Stage 1 = compressor, 1st stage fan operation, reversing valve
Stage 2 = compressor, 2nd stage fan operation, reversing valve
5 Stage 1 = compressor, fan
Stage 2 = compressor, auxiliary electric heat, fan
6 Cooling = compressor, fan, reversing valve
