Reznor MAPS II Unit Installation Manual - Manual (Page 52)

Form I-MAPS II, Page 52
NOTE: If unit is equipped
with a phase loss/phase
reversal control and does
not start, check the phase
rotation of the electrical
supply. See Paragraph
7 and FIGURE 22, page
34.
10. Commissioning and Startup
10.2 Checklist Prior
to Startup
Assumptions: All connections are made; actual startup is imminent. Site is
clean; all excess supplies, scraps, and debris have been removed. Clean filters
are in place. Doors are open for checks.
DANGER: To prevent injury or death due to electrocution or
contact with moving parts, lock disconnect switch open when
doing checks prior to startup. See Hazard Levels, page 2.
NOTE: Redo cooling
startup procedures
when the cooling
season begins.
10.2.1 All Systems Checklist Prior to Startup:
 Check clearances. All clearances must be as illustrated in Paragraph 4.3.
 Verify the electrical supply matches voltage rating of the unit. (Refer to the
rating plate.) Check for voltage imbalance; see Paragraph 7.2.
 Check the wiring for loose connections or damaged wire. Tighten connec-
tions. Replace damaged wiring. (See Paragraph 7 for replacement wiring
requirements.)
 Check all field wiring against the wiring diagram. Be sure all field-installed
controls are in place. Be sure that wire gauges are as required for the elec-
trical load. All field wiring must be compliance with the National Electric
Code and local regulations.
 Be certain that the 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 (firestat 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.
Setscrew torque for pulley (sheave) is 110 in-lb minimum to 130 in-lb maxi-
mum.
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 align-
ment. See Paragraph 6.4.
 Check free rotation of condenser fans.
 Remove compressor tiedowns and all other shipping supports and
restraints.
 Verify that condensate drain is properly trapped and open. See Paragraph
6.2.
 If compressors have crankcase heaters, they must be allowed to warm up
for at least 24 hours prior to startup. The primary cooling compressor on
Models 059, 077, 109, and 139 is equipped with a bellyband type crank-
case heaters. If actual startup of these models is scheduled in 24 hours,
unlock the disconnect switch and turn on the electric.
10.2.2 Gas Heat Checklist Prior to Startup:
 Check gas piping for leaks and proper gas pressure. See Paragraph
9.2.2.1. Bleed gas lines of trapped air.
a) Turn manual shutoff valve to off position.
b) Turn gas supply on.
10.1 General