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SERVICING
S-201 CHECKING TEMPERATURE RISE
Temperature rise is related to the BTUH output of the unit and
the amount of air (CFM) circulated over the indoor coil.
All units are designed for a given range of temperature increase.
This is the temperature of the air leaving the unit minus the
temperature of the air entering the unit.
The more air (CFM) being delivered through a given unit the
less the rise will be; so the less air (CFM) being delivered, the
greater the rise. The temperature rise should be adjusted in
accordance to a given unit specifications and its external static
pressure.
1. Take entering and leaving air temperatures.
2. Select the proper speed tap from the unit's blower perfor-
mance data in the Technical Manual for the specific unit.
3. Take motor amperage draw to determine that the motor is
not overloaded during adjustments.
T
SUPPLY
T
RETURN
T
T
RISE = SUPPLY -
Checking Temperature Rise
RETURN
41
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