18
■
Have all cabinet openings and wiring been sealed?
■
Is the indoor coil orifice sized correct?
■
Have all unused orifice replacement parts and packaging
been disposed of/recycled?
■
Is the filter clean, in place, and of adequate size?
■
Is the wiring neat, correct, and in accordance with the wiring
diagram?
■
Is the air handler properly grounded and fused?
■
Is the thermostat correctly wired and in a good location?
■
Are all access panels in place and secure?
Check Blower Operation
1. Set the thermostat to FAN ON.
2. The indoor blower should come on.
Check Electric Heater (If Used)
1. Set the thermostat to call for auxiliary heat (approximately 5°F
above ambient temperature). The indoor blower and auxiliary
heat should come on together. Allow a minimum of 3 minutes
for all sequencers to cycle on.
2. Set the thermostat so it does not call for heat. Allow up to
5 minutes for all sequencers to cycle off.
Check Airflow
Cooling Blower Speed
■
For proper cooling operation, the airflow through the indoor
coil should be between 350 and 450 CFM per ton of cooling
capacity (or 350 to 450 CFM per 12,000 Btu/h) based on the
rating of the outdoor unit.
■
The cooling blower speed is factory-configured to provide the
correct airflow for an outdoor unit that matches the maximum
cooling capacity rating of the air handler.
■
If the outdoor unit is smaller than the maximum cooling
capacity rating for the air handler, the cooling blower speed
may need to be changed. Refer to the Blower Performance
Chart.
IMPORTANT: The cooling blower speed must be set to provide a
minimum of 350 CFM airflow per ton (1,200 Btu/h) of outdoor
cooling capacity.
WVAHM/WAHMS Motor
Motor Speed Adjustment
The motors in all WVAHM and WAHMS motors are multi-speed
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.
Goodman 6
HIGH VOLTAGE!
WARNING
Disconnect ALL power before servicing.
Multiple power sources may be present.
Failure to do so may cause property damage,
personal injury or death.
CFM Delivered Against External
Static Pressure
Model
Speed
0.1"
0.2"
0.3"
0.4"
0.5"
WVAHM182416
WAHMS18241
Medium
875
830
790
750
715
Low
640
610
570
535
490
WVAHM193116
WAHMS19331
High
1,155 1,090 1,025 950
895
Medium
875
830
790
750
715
Low
640
610
570
535
490
WVAHM303016
WAHMS30301
High
1,135 1,085 1,025 965
915
Medium
860
825
780
750
680
Low
600
570
545
500
465
WVAHM363616
WAHMS36361
High
1,345 1,290 1,230 1,150 1,070
Medium
1,270 1,210 1,140 1,075 980
Low
1,045 1,005 955
885
805
WVAHM364216
WAHMS36421
High
1,700 1,680 1,645 1,610 1,535
Medium
1,500 1,480 1,440 1,380 1,325
Low
1,345 1,320 1,275 1,230 1,195
WVAHM374316
WAHMS37431
High
2,065 2,000 1,925 1,860 1,780
Medium
1,685 1,635 1,550 1,470 1,410
Low
1,490 1,425 1,345 1,280 1,205
WVAHM486016
WAHMS48601
WVAHM496116
WAHMS49611
High
2,135 2,080 1,985 1,900 1,805
Medium
1,975 1,935 1,875 1,775 1,675
Low
1,715 1,670 1,650 1,590 1,530
