Table 11 Heating Pressure; Table 12 Dehum. Relay Logic Board - Bard Q-TEC Q24H2D Series Installation Instructions Manual

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MODEL AIR PRESSURE
TEMP.
Low Side
Q24H2D 70
High Side
Low Side
Q30H2D 70
High Side
Low Side
Q36H2D 70
High Side
Low Side
Q42H2D 70
High Side
Low Side
Q48H2D 70
High Side
Low Side
Q60H2D 70
High Side
Cooling Mode Unoccupied
Cooling Mode Occupied
1st Stage Heating Occupied
1st Stage Heating Unoccupied
2nd Stage Heating Occupied
2nd Stage Heating Unoccupied
Emergency Heat
Dehumidification Occupied
Dehumidification Unoccupied
Dehumidification w/RAT Closed
Fan Only Occupied
Fan Only Unoccupied
NOTES:
1. Cooling takes precedence over dehumidification. A cooling call will cancel dehumidification.
2. Dehumidification takes precedence over first stage heating.
3. A second stage heating call cancels dehumidification.
4. The relay logic board has a jumper on it to choose between full-time dehumidification and occupied dehumidification only. With
the jumper in the 1-2 position dehumidification is available full-time. With the jumper in the 2-3 position dehumidification is
available only when the room is occupied. The room is considered occupied when the A1 terminal is energized.
5. These outputs will be energized if the jumper is in the full time dehumidification position. They will be off if the jumper is in the
occupied dehumidification only position.
Manual 2100-603
Page 44 of 44
TABLE 11
HEATING PRESSURE
(ALL TEMPERATURES IN DEGREES F)
AIR TEMPERATURE ENTERING OUTDOOR COIL
0 5 10 15
35 42 49 56
273 284 295 307
33 40 47 54
278 290 303 315
33 40 47 53
266 275 285 295
29 36 42 49
265 275 286 296
31 37 44 51
268 280 291 302
22 30 37 44
257 270 282 295
TABLE 12
DEHUMIDIFICATION RELAY LOGIC BOARD
Inputs to Board
NOTES G Y B W2
1 X X
1 X X
2 X X X
2 X X X
3 X X X X
3 X X X X
X
4
4
X
X
20 25 30 35 40
62 69 76 83
318 329 340 351
61 67 74 81
327 340 352 364
60 67 74 80
305 315 325 334
56 63 70 77
306 317 327 337
58 64 71 78
314 325 336 348
52 59 66 73
308 320 333 346
E1 A1 D RAT G1
X X
X
X X
X
X X
X
X X
X X X
X 5
X X X
X X
X
45 50 55 60
89 96 103 110
362 374 385 396 407
88 95 102 109
377 389 401 414 426
87 94 100 107
344 354 364 374 384
83 90 97 104
347 358 368 378 389
85 92 98 105
359 370 382 393 404
81 88 95 103
358 371 384 396 409
Outputs From Board
BK YO RV W E1
X X
X X
X X X
X X X
X X X X
X X X X
X X X
X
5
X X X
65
116 123
418
116 122
438
114 121
393
111 117
399
112 119
416
110 117
422
A2 TWV
X
X
X
X X
5 5
X
X