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48
18.3
BLOWER AIRFLOW
IOM
IOM
DISCONNECT THE ELECTRICAL SUPPLY TO THE FURNACE BEFORE ATTEMPTING TO
CHANGE THE BLOWER SPEED. FAILURE TO DO SO COULD RESULT IN ELECTRICAL
This unit is factory set to run at the middle of the heating temperature rise range
as listed on the rating plate. The cooling speed is set to the maximum airfl ow
designated in the model number.
Three sets of 4 position movable jumpers are provided for Heat, Cool, and Adjust
taps for a variable speed motor. These tap jumpers apply signals to the ECM
motor without other interaction with the control board.
If the blower speeds require adjustment, follow these steps:
1. Remove the blower compartment door.
2. To adjust the airfl ow, remove the COOL or HEAT jumper from position A, and
place it on the corresponding letter B, C, or D. Refer to Table 7A and 7B.
Moving the ADJUST jumper from the NORM to the (+) or (-) position will cause the airfl ow to be increased or
lowered by 15%.
The TEST position on the ADJUST tap is not used.
TABLE 11A - AIRFLOW (W1-LOW HEAT)
Heat Jumper
A (MAX)
B
C
D
TABLE 11B - AIRFLOW (W2-HIGH HEAT)
Heat Jumper
A (MAX)
B
C
D
W415-2306 / C / 09.22.20
!
SHOCK RESULTING IN PERSONAL INJURY OR LOSS OF LIFE.
WUV040T2AA-N
WUV060T3AA-N
ESP: 0.10" WC -
ESP: 0.12" WC -
0.50" WC
0.50" WC
405
608
342
566
WUV040T2AA-N
WUV060T3AA-N
ESP: 0.10" WC -
ESP: 0.12" WC -
0.50" WC
0.50" WC
607
928
554
773
495
718
H12.7.5A
WARNING
!
H22.6.2D
WUV080T3AA-N
WUV080T4BA-N
ESP: 0.20" WC - 0.50" WC
CFM
802
786
N/A
675
748
617
656
WUV080T3AA-N
WUV080T4BA-N
ESP: 0.20" WC - 0.50" WC
CFM
1149
1225
N/A
1024
1106
963
1018
H3.77
NOTE:
Temperature rise should
always be re-checked
whenever blower speed
is changed. Airfl ow must
not go above specifi ed
maximum in tables
.
below
WUV100T5BA-N
WUV120T5BA-N
1134
1306
972
1068
890
923
WUV100T5BA-N
WUV120T5BA-N
1628
1833
1399
1588
1311
1394
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