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58 WSHP-SVX01D-EN
Blower Motor Speed-Tap Retrofit (for 1/2 Through 5 Ton Units ONLY)
Motors installed in the unit include 4-speed and 3-speed configurations. All voltages include a 4-speed configuration, with
the exception of 380V, 415V, 460V which contain a 3-speed arrangement and 575V which contains a 2-speed arrangement.
To modify the rpm of the motor, the following steps may be followed.
WARNING
Hazardous Voltage!
Disconnect all electric power, in-
cluding remote disconnects before
servicing. Follow proper lockout/
tagout procedures to ensure the
power can not be inadvertently
energized. Failure to disconnect
power before servicing could result
in death or serious injury.
Step 1
Step 2
Remove service access panel at the unit
front.
Step 3
Find the blower motor relay. The relay is
highlighted above. The relay location is
consistent in all control configurations.
Step 4:
For units w/o Hot Gas Reheat
Remove undesired speed-tap wire from 1K4
relay at spade 3. Wire tie the lead, to
eliminate a short.
Step 5:
For units w/o Hot Gas Reheat
Select desired speed-tap wire.
Connect desired speed tap wire to 1K4 relay
at spade 3.
Step 6:
Install service front panel.
Reconnect power to the unit.
For units with Hot Gas Reheat
Remove undesired speed-tap wire from 1K8
relay at spade 6. Wire tie the lead, to
eliminate a short.
For units with Hot Gas Reheat
Select desired speed-tap wire.
Connect desired speed tap wire to 1K8 relay
at spade 6.
Installation
Air Flow Adjustment
4-Speed Motor (115, 208, 230, 265)
Lead Colors
Lead
Speed
Black Blue Orange Red
High
Medium
High
Medium
Low
Low
Note: When using the medium or low speed tap, the
purple wire must be jumpered to the high speed tap (blk).
3-Speed Motor (380, 415, 460)
Lead Colors
Lead Speed
Black Blue Orange
High Medium Low
2-Speed Motor (575)
Lead Colors
Lead
Speed
Black Blue
High Low