Manual 2100-752B
Page
49 of 49
Energize on
Unit Terminal
Strip
Mode
Occupied/
Unoccupied
Inputs to the Board
Outputs from the Board
RAT
Y
W2 A1
D
G
G1 BK
RV TWV W
YO
A2
Y1, G
1st Cooling
Unoccupied
X
X
X
X
X
Y1, G, A
1st Cooling
Occupied
X
X
X
X
X
X
X
Y1, G, A, D
1st Cooling
w/Dehum
Occupied
X
X
X
X
X
X
X
X
Y1, G, D
1st Cooling
w/Dehum
Unoccupied
X
X
X
X
X
X
Y1, G, B/W1,
W2
2nd Heat
w/Strips
Unoccupied
X
X
X
X
X
X
X
X
Y1, G, B/W1,
W2, A
2nd Heat
w/Strips
Occupied
X
X
X
X
X
X
X
X
X
X
Y1, G, B/W1,
W2, A, D
2nd Heat
w/Strips and
Dehum
Occupied
X
X
X
X
X
X
X
X
X
X
X
Y1, G, B/W1,
W2, D
2nd Heat
w/Strips and
Dehum
Unoccupied
X
X
X
X
X
X
X
X
X
D
Dehum
Unoccupied
X
X
X
X
D, A
Dehum
Occupied
X
X
X
X
X
X
TABLE 15
Dehumidification Relay Logic Board
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.
