Achieving 2% Low Leakage Rate; Wahms Motor; Motor Speed Adjustment; Wahme Motor - Whirlpool WAHMS Installation Instructions Manual

ACHIEVING 2% LOW
LEAKAGE RATE
Ensure that the Neoprene gasket with PSA remains intact on all
surfaces that the access panels are secured to. These surfaces
are the entire length of the wrapper and areas between the upper
tie plate, upper and lower access panels. Check that the upper
access panel breaker insert gasket is intact and that the flowrator
gasket is installed on the lower access panel. An additional drain
hole cover is required.

WAHMS MOTOR

Motor Speed Adjustment

The motors in all WAHMS are multispeed PSC motors. The color
of the wire coming from the motor to the "COM" terminal on the
control board defines in which speed the motor will operate. The
black wire represents high speed, the red wire represents low
speed and the blue wire (select models only) represents medium
speed.
To change speeds, remove the wire attached to the COM
terminal on the control board, and swap it with the wire on
terminal M1 or M2 with the color that will give the desired speed.
NOTE: On some models, not all speed taps are allowable for
certain electric heat applications. Refer to the air handler series
and ratings plate for minimum speed.
Model Speed
WAHMS1824P4* High
Medium
Low
WAHMS1931P4* High
Medium
Low
WAHMS3030P4* High
Medium
Low
WAHMS3636P4* High
Medium
Low
WAHMS3642P4* High
Medium
Low
WAHMS3743P4* High
Medium
Low
CFM Delivered Against External
Static Pressure
0.1" 0.2" 0.3" 0.4"
1,155 1,090 1,025 950
940 890 860 815
695 665 650 610
1,135 1,085 1,025 965
860 825 780 750
600 570 545 500
1,385 1,315 1,240 1,155 1,065
1,340 1,290 1,230 1,140 1,050
1,075 1,030 980 910
1,310 1,240 1,155 1,090 1,020
1,270 1,210 1,140 1,075 980
1,045 1,005 955 885
1,700 1,660 1,625 1,545 1,505
1,500 1,440 1,400 1,350 1,345
1,330 1,300 1,250 1,230 1,220
2,065 2,000 1,925 1,860 1,780
1,685 1,635 1,550 1,470 1,410
1,490 1,425 1,345 1,280 1,205
Model
WAHMS4860P4* High
WAHMS4961P4* High
NOTE: Assumes dry coil with filter in place; SCFM correction for
wet coil = 4% (208V/240V).
The WAHME air handler features an energy efficient blower
motor. The motor is a constant torque motor with very low power
consumption. The motor is energized by 24V AC. Adjust the CFM
by changing the 24V AC leads to the desired speed on the
terminal block.
The WAHME motor blower speed is programmed to deliver
adequate airflow at rated external static pressure and with
60-second off time delay. For details, refer to the specification
sheet applicable to your model.
The following table shows the CFM speed tap settings for the
WAHME.
0.5"
895
755
Model
550
WAHME1830P4
915
680
465
WAHME3137P4
840
805
WAHME4260P4
CFM Delivered Against External
Static Pressure
Speed 0.1" 0.2" 0.3"
2,150 2,120 2,070 2,000 1,940
Medium 1,940 1,930 1,905 1,860 1,790
Low 1,610 1,600 1,590 1,575 1,550
2,150 2,105 2,040 1,970 1,880
Medium 1,960 1,935 1,895 1,825 1,750
Low 1,670 1,625 1,585 1,525 1,455

WAHME MOTOR

CFM Delivery

CFM Delivered Against External
Static Pressure
Speed
Tap 0.1" 0.2" 0.3"
1 700 670 650
2 820 785 765
3 920 900 850
4 1,075 1,055 1,015 975
5 1,130 1,115 1,085 1,040 1,000
1 1,060 865 600
2 1,105 910 795
3 1,165 1,070 1,020 960
4 1,285 1,240 1,195 1,140 1,100
5 1,435 1,395 1,350 1,315 1,265
1 1,445 1,275 1,175 940
2 1,545 1,405 1,325 1,260 1,145
3 1,660 1,610 1,555 1,490 1,415
4 1,905 1,870 1,810 1,750 1,695
5 2,115 2,070 2,000 1,965 1,915
0.4" 0.5"
0.4" 0.5"
595 510
745 705
840 815
960
515 420
745 690
915
855
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