Heat Controller HEV Series Installation, Operation & Maintenance Manual page 32

Installation, Operation & Maintenance
DXM2 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 fi rst
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 7c: Unit Operation
T-stat signal
G
G, Y1
G, Y1, Y2
G, Y1, Y2, W
G, W
G, Y1, O
G, Y1, Y2, O
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, 3rd stage fan operation
2 Stage 1 = 1st stage compressor, 1st stage fan operation, reversing valve
Stage 2 = 2nd stage compressor, 2nd stage fan operation, reversing valve
HEV/H SERIES
DXM2 CONTROLS
Unit
ECM fan
Fan only
1
Stage 1 heating
1
Stage 2 heating
1
Stage 3 heating
Emergency heat
2
Stage 1 cooling
2
Stage 2 cooling
Figure 25: Test Mode Button
Gnd B- A+ 24V
P5
Push test button to
enter Test Mode and
speed-up timing and
delays for 20 minutes.
32
Heat Controller, Inc.
P4
(240Vac)
(240Vac)
N.O.
Com
Fan Enable Fan Speed
Test
P12
N.C.
N.O.
P8
12V
IN
OUT
Gnd
NC