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Figure 32. Unit Wiring Diagram - Electric Heat and Air Handler
Start-Up Operation
NOTE - Refer to outdoor unit installation instructions for
system start-up instructions and refrigerant charging
instructions.
PRE‐START‐UP CHECKS
S Is the air handler properly and securely installed?
S If horizontally configured, is the unit sloped up to 5/8
inch toward drain lines?
S Will the unit be accessible for servicing?
S Has an auxiliary pan been provided under the unit with
separate drain for units installed above a finished
ceiling or in any installation where condensate overflow
could cause damage?
S Have ALL unused drain pan ports been properly
plugged?
S Has the condensate line been properly sized, run,
trapped, pitched, and tested?
S Is the duct system correctly sized, run, sealed, and
insulated?
S Have all cabinet openings and wiring been sealed?
S Is the indoor coil factory‐installed TXV properly sized
for the outdoor unit being used?
S Have all unused parts and packaging been disposed
of?
S Is the filter clean, in place, and of adequate size?
S Is the wiring neat, correct, and in accordance with the
wiring diagram?
S Is the unit properly grounded and protected (fused)?
S Is the thermostat correctly wired and in a good
location?
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