Refrigerant Charge Checks - Whirlpool Gold WPH43M Installation Instructions Manual

Model Speed
WPH4336AM Low
Med
High
HIGH
WPH4342AM Low
Med
High
WPH4348AM T1(G)
T2/T3 (W2)
T4/T5 (Y)
WPH4360AM T1 (G)
T2/T3 (W2)
T4/T5 (Y)
NOTES:
Data shown is dry coil. Wet coil pressure drop is
approximately 0.1" H 0 for 2-row indoor coil, 0.2" H
2
3-row indoor coil; and 0.3" H
After completing airflow measurements and adjustments, the
unit's refrigerant charge must be checked. The unit is factory
charged based on 400 CFM per ton at minimum ESP per AHRI
test conditions (generally between 0.15 and 0.25 ESP). When air
quantity or ESP differs from this, charge must be readjusted to
the proper amount.
All package units are charged to the superheat method at the
compressor suction line (these are fixed orifice devices).
For charging in the warmer months, 8ºF +/-3ºF superheat at the
compressor is required at conditions: 95ºF (35ºC) outdoor
ambient (dry bulb temperature), 80ºF (27ºC) dry bulb / 67ºF
(19ºC) wet bulb indoor ambient, approximately 50% humidity.
This superheat varies when conditions vary from the conditions
described.
12
E.S.P. (In. of H
Volts—230 0.1
CFM 1,122
Watts 338
CFM 1,387
Watts 456
CFM 1,521
Watts 534
CFM 1,565
Watts 495
CFM 1,122
Watts 338
CFM ,387
Watts 456
CFM 1,521
Watts 534
CFM 1,140
Watts 275
CFM 1,795
Watts 475
CFM 1,860
Watts 515
CFM 1,755
Watts 420
CFM 1,850
Watts 480
CFM 2,180
Watts 770
0 for
2
0 for 4-row indoor coil.
2

Refrigerant Charge Checks

O)
2
0.2 0.3 0.4
1,078 1,032 972
330 321 310
1,331 1,264 1,209
440 428 412
1,454 1,388 1,311
521 510 490
1,510 1,415 1,340
480 460 445
1,078 1,032 972
330 321 310
1,331 1,264 1,209
440 428 412
1,454 1,388 1,311
521 510 490
1,395 1,360 1,310
285 295 315
1,765 1,715 1,695
490 505 520
1,820 1,785 1,745
530 545 565
1,720 1,685 1,645
435 455 460
1,820 1,775 1,735
500 515 525
2,125 2,050 1,975
755 725 700
Data shown does not include filter pressure drop,
approximately 0.08" H
All models should run no less than 350 CFM/Ton.
Reduce airflow by 2% for 208-volt operation.
A superheat charge chart is available for other operating
conditions. Use it to provide the correct superheat at the
conditions the unit is being charged at. After superheat is
adjusted it is recommended to check unit subcooling at the
condenser coil liquid line out. In most operating conditions 10ºF
to 15ºF of subcooling is adequate.
Determine Superheat
1. Read suction pressure.
2. Determine Saturated Suction Temperature from tables or
pressure gauge saturated temperature scale (R-410A).
3. Read suction line temperature.
4. Use the following formula to determine Superheat.
0.5 0.6 0.7
915 804 687
300 283 264
1,119 1,041 935
399 382 363
1,230 1,144 1,055
477 461 442
1,260 1,135 1,035
425 405 385
915 804 687
300 283 264
1,119 1,041 935
399 382 363
1,230 1,144 1,055
477 461 442
1,265 1,235 1,190
325 335 345
1,650 1,600 1,500
530 535 510
1,700 1,625 1,515
570 550 535
1,615 1,570 1,530
475 490 500
1,705 1,675 1,610
535 555 545
1,875 1,800 1,655
675 640 575
O.
2
0.8
558
250
748
330
939
420
885
355
558
250
748
330
939
420
1,130
355
1,375
475
1,395
485
1,465
500
1,495
520
1,530
540