Bard Q-TEC Q A4D Series, Руководство по установке

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Manual 7960-923
Page
9 of 10
Energize on Unit
Terminal Strip
Mode
Occupied/
Unoccupied
Inputs to the Board
Outputs
from the
Board
Y W2 A1 D TWV YO G1
Y1, G Cooling Unoccupied X X X
Y1, G, A Cooling Occupied X X X X
Y1, G, A, D Cooling w/Dehum

Occupied X X X X X
Y1, G, D Cooling w/Dehum

Unoccupied X X X X
G, B/W1 1st Stage Electric Heat Unoccupied X X
G, B/W1, A 1st Stage Electric Heat Occupied X X X
G, B/W1, A, D 1st Stage Electric Heat w/Dehum

Occupied X X X
G, B/W1, D 1st Stage Electric Heat w/Dehum

Unoccupied X X
G, B/W1, W2 2nd Stage Electric Heat Unoccupied X X
G, B/W1, W2, A 2nd Stage Electric Heat Occupied X X X
G, B/W1, W2, A, D 2nd Stage Electric Heat and Dehum

Occupied X X X
G, B/W1, W2, D 2nd Stage Electric Heat and Dehum

Unoccupied X X
D Dehum Unoccupied X X

X

X

D, A Dehum Occupied X X X X X
TABLE 3
Dehumidification Relay Logic Board

Cooling takes precedence over dehumidification. A cooling call cancels dehumidification.

The dehumidification input “D” is not received by the board because of an isolation relay that is energized by the call for heating (B/
W1). Thus, the heating call (B/W1) always takes precedence over 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.