Heating; Continuous Fan; Defrost; Electric Resistance Heating - Payne PA3Z Installation Manual

PA3Z SPEED TAP WATTS/C.F.M
1
024
2
2
030
3
1
036
2
3
042
4
1
2
048
3
4
1
2
060
3
4
Air delivery values are based on operating voltage of 230-v., dry coil, without filter or electric heater. Deduct wet coil, filter, and electric heater pressure drops to obtain
external static pressure availabe for ducting.
Do not operate the unit at a cooling airflow that is less than 350 cfm for each 12,000 Btuh of rated cooling capacity. Evaporator coil frosting may occur at airflows below this
point.
Dashes indicate portions of the table that are beyond the blower motor capacity or are not recommended.
C. COOLING OPERATION (SIZES 048 AND 060)
These units utilize a 2 stage indoor thermostat. With a first stage call for cooling (Y1), the indoor fan (low stage) energizes immediately whereas
the contactor energizes after a 5 minute time delay (in case of an initial start-up) starting the compressor (low stage) and the outdoor fan motor.
If the low stage operation cannot satisfy the cooling demand, the second stage cooling (Y2) energizes switching the compressor into high stage
cooling through energizing an internal solenoid valve inside the scroll compressor and switching the indoor fan into high stage. When second stage
cooling is satisfied, Y2 de-energizes switching the compressor and the indoor fan into low stage cooling. When the low stage cooling demand is
met, Y1 de-energizes shutting the compressor, indoor fan and the outdoor fan.
D. HEATING OPERATION (SIZES 024-042)
With a call for heating (W2), the auziliary or electric heat energizes along with the indoor blower. In case of staged heating, W3 is energized if
the demand is not met. The highest airflow selected is run while the electric heat is in operation. When heating demand is met, W3 and W2
sequentially de-energize shutting the indoor fan and the electric heater.
E. HEATING OPERATION (SIZES 048 AND 060)
With a call for heating (W2), the auxiliary electric heater is energized along with the indoor blower. If the demand is not met, W3 is energized
in case of staged heating. When heating demand is satisfied, W3 and W2 sequentially de-energize along with the indoor fan blower.
F. CONTINUOUS FAN
With the continuous Indoor fan option selected on the thermostat, G is continuously energized. In case of 024-042 units, the selected airflow setting
is provided. In case of 048 and 060 units, the system runs low stage (Y1) airflow for continuous fan operation.
G. DEFROST
Defrost board (DB) is a time and temperature control, which includes a field-selectable time period between checks for defrost (30, 60, 90 and
120 minutes). The time period is factory-set at 60 minutes and should only be adjusted by a trained service person. Electronic timer and defrost
cycle start only when contactor is energized and defrost thermostat (DFT) is closed.
Defrost mode is identical to Cooling mode. The outdoor fan motor stops because of "OF1" and "OF2" contacts opening on the defrost board, a
bank of optional electric heat turns on to warm air supplying the conditioned space.
Table 7—Dry Coil Air Delivery* Horizontal Discharge
(Deduct 10 percent for 208 Volt Operation)
0.1 0.2
Watts - 99
C.F.M. - 848
Watts - -
C.F.M - -
Watts - 155
C.F.M - 1108
Watts - -
C.F.M. - -
Watts 180 166
C.F.M. 1344 1215
Watts - -
C.F.M. - -
Watts 269 283
C.F.M. 1440 1404
Watts - -
C.F.M. - -
Watts — 204
C.F.M. — 1129
Watts — —
C.F.M. — —
Watts 386 398
C.F.M. 1680 1652
Watts — 440
C.F.M. — 1745
Watts 224 235
C.F.M. 1334 1288
Watts - -
C.F.M. - -
Watts 608 626
C.F.M. 1931 1900
Watts 737 755
C.F.M. 2093 2061
EXTERNAL STATIC PRESSURE
.03 0.4 0.5
100 118 130 142
793 757 698 632
- - - 222
- - - 970
146 157 170
995 951 884
- - - 261
- - - 1117
179 191 204 216
1172 1136 1095 1051
- 261 276 290
- 1343 1304 1272
305 321 336 349
1369 1333 1301 1273
418 432 450 465
1572 1543 1504 1475
209 216 229 236
1087 1027 994 932
233 245 254 266
1164 1122 1066 1025
409 418 425 435
1625 1583 1555 1515
448 457 462 469
1717 1684 1651 1612
251 266 277 291
1259 1224 1181 1157
286 301 311 325
1333 1296 1261 1232
643 660 668 685
1878 1844 1817 1789
770 787 799 817
2028 2001 1971 1934
—16—
0.6 0.7 0.8 0.9
- - -
- - -
233 244 257
918 861 795
- - - -
- - - -
275 286 291
1053 1014 980
- - -
- - -
301 316 329
1234 1190 1148
360 - -
1239 - -
480 490 503
1441 1418 1380
249 — —
881 — —
276 289 —
954 906 —
438 441 451
1477 1444 1403
477 480 485
1573 1537 1508
298 - -
1117 - -
333 344 370
1199 1170 1062
697 - -
1755 - -
826 812 782
1899 1850 1757
1.0
-
-
260
729
-
-
315
877
-
-
342
1100
-
-
518
1332
—
—
—
—
—
—
486
1470
-
-
-
-
-
-
-
-