I Single Package Heat Pumps Installation Instructions
8.Start-upProcedures
Electrical shock hazard.
Use extreme care during all of the following
checks and procedures.
Make sure electric power is turned OFF as
instructed in appropriate steps.
Failure to follow this warning can result in prop-
erty damage, personal injury, and/or death.
Circulating Air Blower
Determining Blower Speed
1. Turn electric power OFF.
From the system design, determine the external stat-
ic pressure (ESP) for the supply ducts, return ducts
and registers, diffusers, grilles, dampers, heaters
and filters.
3. To your system ESP determined in Step 2, add 0.05
In. W.C. for a wet coil.
4. From the system design, determine the desired cool-
ing airflow in cubic feet per minute (CFM).
Locate the unit's Blower Performance Data table in
the tech data sheet for the unit's voltage. (The tech
data sheet is attached to the inside of the electrical
access panel and is also published in the Parts List.)
From the table, determine the speed tap the desired
airflow requires.
6. See next section, Speed Taps, to set the blower mo-
tor speed terminal block (speed taps) determined in
the following steps.
SpeedTaps
After determining the required CFM and speed tap data
from the tech data sheet, follow the steps below to change
speeds if necessary.
NOTE: The yellow lead MUST always be connected to the
speed tap block at the common quick connect terminal.
The terminal is identified as COM. Also, this is the only lead
which is 3/16" wide. All other quick connects are 1/4" wide.
Refer to FIGURE 13 on Page 18 and the unit's wiring dia-
gram, which is attached to the inside of the electrical ac-
cess panel and is also published in the Parts List for the
desired speed tap to achieve the required CFM for the ap-
plicable model.
Cooling,Heating(HeatPump)andAuxiliary
ElectricStripHeat
NOTE: The cooling, heat pump and strip heat airflows
are all on the same speed tap. The refrigerant system
requires the same specific CFM for proper operation in
the cooling and the heat pump mode. For this reason,
cooling and heating airflow must bethe same. DO NOT
SPLITOUT INTO A COOLING SPEED AND HEATING
SPEED.
Check Before Starting
1.
2.
3.
Check that the blower motor speed terminal block is
set to the proper speed. Refer to the unit wiring dia-
gram and the Technical Labels in the Parts List.
Check to see that clean, properly sized field supplied
air filters are installed in the return air duct.
Inspect the inside of the unit to be sure that all wires
are in place and all tools, etc. are removed.
4. Replace all service access panels.
Check the unit's operation as outlined in the following
instructions. If any unusual sparking, odors or noises are
encountered, shut OFF electric power immediately. Re-
check for wiring errors, or obstructions in or near blower
motors.
Circulating Air Blower
1. Be sure electric power is OFF.
2. Set thermostat Heat-Cool selector to OFF.
3. Set thermostat fan switch to AUTO.
4. Turn electric power ON. Nothing should start run-
ning.
5. Set thermostat fan switch to ON. The circulating air
blower should come ON after a 30 second delay.
6. Reset thermostat fan switch to AUTO. The circulat-
ing air blower should go OFF after a 30 second delay.
Nothing should be running.
7. Turn electric power OFF.
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