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Energize on
Unit Terminal
Mode
Strip
Y1, G
1st Cooling
Y1, G, A
1st Cooling
1st Cooling
Y1, G, A, D
w/Dehum
1st Cooling
Y1, G, D
w/Dehum
Y1, G, B/W1,
2nd Heat
W2
w/Strips
Y1, G, B/W1,
2nd Heat
W2, A
w/Strips
2nd Heat
Y1, G, B/W1,
w/Strips and
W2, A, D
Dehum
2nd Heat
Y1, G, B/W1,
w/Strips and
W2, D
Dehum
D
Dehum
D, A
Dehum
Cooling takes precedence over dehumidification. A cooling call cancels dehumidification.
The relay logic board has a jumper (J1) on it to choose between "any-time dehumidification" and "occupied
dehumidification". The factory default is P1-P2. With the jumper in the P1-P2 position, dehumidification is available
any time there is a "D" input to the relay logic board. With the jumper in the P2-P3 position, dehumidification is
available when there is an occupancy signal to the "A1" terminal, "D" would also need to be energized to dehumidify.
Refer to sequence of operation. In most cases cooling and heating modes take priority over dehumidification.
TABLE 15
Dehumidification Relay Logic Board
Occupied/
Inputs to the Board
Unoccupied
RAT
Y
Unoccupied
X
Occupied
X
Occupied
X
Unoccupied
X
Unoccupied
X
Occupied
X
Occupied
X
Unoccupied
X
Unoccupied
Occupied
W2
A1
D
G
G1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Outputs from the Board
BK
RV TWV
W
YO
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Manual 2100-752B
Page
49 of 49
A2
X
X
X
X
X
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Table of Contents
Troubleshooting
