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Air Flow Inspection:
•
For proper cooling operation, the airflow through the indoor coil should be between 350 and
450 CFM per ton of cooling capacity (or 350 – 450 CFM per 12,000 BTU/HR) based on the
rating of the outdoor unit.
•
The cooling blower speed is factory configured to provide 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 section "3.8.4 Blower Performance
Data" for more information.
IMPORTANT: The cooling blower speed must be set to provide a minimum of 350 CFM airflow
per ton (12,000 BTU/hr) of outdoor cooling capacity.
•
Air Handler Models AH083P/CP, AH084P/CP, AH125P/CP, AH206P/CP:
1. Disconnect all power supplies.
2. Remove the air handler access panel.
3. Locate the blue wire (Med) running from the blower motor to the control board.
4. Remove this blue wire from the control board and cover this loose end of this wire now
with an insulating cap.
5. Locate the Red or Black wires connected to the blower motor. Connect the Red (Low) to
the control board at its respective terminal for low speed or connect the Black (High) to
the control board at its respective terminal for high speed.
6. Replace all panels.
7. Reconnect power.
•
Air Handler Models AH166P/CP:
1. Disconnect all power supplies.
2. Remove the air handler access panel.
3. Locate the black wire (High) running from the blower motor to the control board.
4. Remove this black wire from the control board and cover this loose end of this wire now
with an insulating cap.
5. Locate the Blue or Red wires connected to the blower motor. Connect the Blue (Med) to
the control board at its respective terminal for medium speed or connect the Red (Low)
to the control board at its respective terminal for low speed.
6. Replace all panels.
7. Reconnect power.
IMPORTANT
For blower performance data, refer to section "3.8.4 Blower Performance Data."
40
Hydronic Air Handler Installation and Operation Manual
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