Installation and Maintenance Manual

Installation
18 WSHP-SVX10B-EN
PSC Blower Motor Speed Retrofit
PSC motors installed in the unit have multiple speed
configurations.To modify the rpm of the motor, the
following steps may be followed.
1. Locate the blower motor relay inside the chassis
control box.
2. Remove the undesired speed tap.
3. Select desired speed tap wire by using information
from Table 9, p. 18.
4. Connect desired tap wire to the 1K4 relay at spade 4.
5. Reconnect power to the unit.
ECM Motor CFM Settings
To adjust the CFM, disconnect the power to the unit. Set
the DIP switch located in the control box to the desired
profile setting. See Figure 16. Connect the power to the
unit. If ht epower is not disconnected when the DIP switch
is set, th emotor will not be programmed ot the new
setting.
Note: Units with the optional ECM motor are shipped
from the factory on Profile B.
To adjust the CFM, disconnect the power to the unit. Set
the DIP switch located in the control box to the desired
profile setting. See Figure 16. Connect the power to the
unit. If the power is not disconnected when the DIP switch
is set, the motor will not be programmed to the new
setting.
• Profile A = 110% of rated air flow
• ProfileB=100%ofrated air flow
• Profile C = 90% of rated air flow
• Profile D = 805 of rated air flow
Table 8. Deluxe controller diagnostic LEDs
Color: Green Color: Red Controller Mode
LED1 LED2 LED3
OFF OFF OFF Control OFF
ON
OFF OFF Normal/Compressor OFF
ON
OFF FLASH Anti-short Cycle
ON
OFF ON Normal/Compressor ON
FLASH
ON OFF Brownout Condition
ON
FLASH ON Soft Lockout (low pressure)
ON
FLASH FLASH Soft Lockout (high pressure)
ON
ON ON
Manual Lockout (low
pressure)
ON
ON FLASH
Manual Lockout (high
pressure)
ON
FLASH OFF
Manual Lockout (condensate
overflow)
ON
ON OFF Compressor Disable
WARNING
Hazardous Voltage!
Disconnect all electric power, including 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.
Table 9. Lead change
Lead Colors
Lead Speed High Low
Blower
1G 9A
Figure 16. ECM control board and dip switch setting
Dip Switch
to select profile
123456 78
On
Off
Profile A
12345678
On
Off
Profile B
1 2 3 45678
On
Off
Profile C
12345678
On
Off
Profile D