Form I-MAPSIII&IV, P/N 222917R9, Page 65
NOTE: If unit is equipped
with an optional phase
loss/phase reversal control
(Option PL4) and does
not start, check the phase
rotation of the electrical
supply. See Paragraph 7.
Check the wiring for loose connections or damaged wire. Tighten connections.
Replace damaged wiring. (See Paragraph 7.0 or the wiring diagram for replace-
ment wiring requirements.)
Check all eld wiring against the wiring diagram. Be sure all eld-installed controls
are in place. Be sure that wire gauges are as required for the electrical load. All
eld wiring must comply with the National Electric Code and local regulations.
Be certain that all electrical entrances are sealed against the weather.
Check that fuses or circuit breakers are in place and sized correctly.
Be certain optional manual reset controls (restat and high gas pressure switch)
are reset.
If any changes are required to factory settings, be sure they have been made.
(Refer to control instructions shipped with the unit.)
IMPORTANT - Before applying power, check blower pulley, blower wheel,
and motor pulley to be sure they are secure to the shafts. Check blower and
pulleys for free movement. Check belt tension and alignment. See Paragraph
6.6.
Setscrew torque for bearing hub with 1-3/8 to 1-3/4" shaft is 165 in-lbs. Socket
setscrew size is 5/16".
Check blower and pulleys for free movement. Check belt tension and alignment.
See Paragraph 6.6.
Check free rotation of condenser fans.
Remove compressor tiedowns and all other shipping supports and restraints.
Verify that condensate drain is open and properly trapped. Fill trap with water. See
Paragraph 6.5.
Crankcase heaters must be allowed to warm up for at least 24 hours prior to
startup. If actual startup is scheduled in 24 hours, unlock the disconnect switch
and turn on the electricity.
If equipped with eld-installed energy recovery module, Option ER1, verify checks
in Form I-MAPSIII&IV-ER, Paragraph 8.0, have been completed.
10.2.2 Gas Heat
Checklist Prior to
Startup:
Check gas piping for leaks and proper supply gas pressure (6.0" w.c.
minimum/14.0" w.c. maximum). Bleed gas lines of trapped air.
a) Turn manual shutoff valve to off position.
b) Turn gas supply on.
c) Observe gas meter for movement, or
d) Attach pressure gauge readable to 0.1" w.c. and after turning gas on for ten
seconds, turn gas supply off. No change in pressure should occur over a three-
minute period.
e) If either c) or d) above indicate a leak, locate leak by brushing a soapy solution
on all ttings. Bubbles will appear at the leak. Repair and repeat tests.
Check to make sure that the vent covers are installed. Check that combustion air
inlet and ue discharge openings are free of obstructions.
When all checks are completed satisfactorily, close and secure all doors.
10.3 Checklist -
Startup
10.3.1 Startup Checklist for ALL Systems
Assumptions: All prior to startup checks have been completed satisfactorily. Com-
pressors with crankcase heaters have been allowed to warm up for at least 24 hours.
NOTE: Redo startup procedures when the cooling season begins.
If there is a furnace section, turn on the gas.
Adjust the system controller so that a call for cooling exists. Observe for complete
sequencing.
CAUTION: Crankcase heaters must be allowed to warm up for at least 24 hours prior to
startup. Disable cooling controls before turning on power to warm up crankcase heaters.
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