York International P3HMX12F08001, Руководство по установке

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Table C-4: System and General Troubleshooting
continued
Problem Possible Cause Remedy
Airflow blocked or dirty air fil-
ter.
Clean or replace air filter.
Supply air temperature
too hot.
Insufficient airflow.
Check all dampers. Open closed dampers including registers in
unused rooms. Check system temperature rise. If temperature
rise is too high, speed up blower fan.
Excess airflow.
Check system temperature rise. Slow down blower fan if neces-
sary.
Supply air temperature
too cool.
Excessive duct losses.
Check supply air ductwork. Seal leaky joints and seams. Insu-
late ductwork if necessary.
Fan control "fan on" setting too
low.
Increase differential between fan control "fan off" and "fan on"
settings. (L4064B, L6064A fan / limit controls only, no adjust-
ments available for L4064W fan / limit control). Register air de-
flectors may help.
Supply air temperature
too cool during first mo-
ments of furnace cycle.
Excessive duct losses.
Check supply air ductwork. Seal leaky joints and seams. Insu-
late ductwork if necessary.
Air Filter Locations
P3LBX
Models
P3HMX
Models