Reznor RXH (Outdoor PreevA) Unit Installation Manual - Manual (Page 60)

Form I-RDH/REH/RHH/RXH (12-14), Page 60
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.
Warnings and checks apply to all units unless indicated.
9.1 General 9.0 Commissioning
and Startup
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.
9.2 Checklist Prior to
Startup
9.2.1 All Systems Checklist Prior to Startup:
 Check clearances. All clearances must be as illustrated in Paragraph 4.1.
 Verify the electrical supply matches the unit. (Refer to the rating plate.)
 Check the wiring for loose connections or damaged wire. Tighten connections.
Replace damaged wiring. (See Paragraph 7.0 or the wiring diagram for
replacement wiring requirements.)
 Check field wiring and controls against the wiring diagram. Be sure that wire
gauges are as required for the electrical 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. Check blower and
pulleys for free movement. Check belt tension and alignment. (Paragraph 6.9)
 Verify the removal of all shipping supports.
 Check discharge duct connection. (Paragraph 6.8.4)
Important NOTE: When
the unit is started for
the first time, complete
the startup form on
page 64. Keep with
the unit for future
reference.
9.2.2 Gas Heat (RDH
and RHH) 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 fittings. Bubbles will appear at the leak. Repair and repeat tests.
 Be sure that both flue discharge and combustion air openings are free of
obstructions.
 If installed in California, verify that California Warning Label is displayed. See
Paragraph 1.4.
 Model RDH equipped with Option CS2, verify that the burner condensate drain
is connected, the trap is full, and that the line empties into a sanitary drain.
(Paragraphs 6.2.1 & 6.6.4)
 Model RDH equipped with modulating gas control AG58 or D12G, verify that the
vent area condensate drain which exits from the bottom of the unit, is connected,
the trap is full, and that it empties into a sanitary drain. (Paragraphs 6.2.2 & 6.6.4)
 Model RHH, verify that the Heat section and vent area condensate drains which
exit from the bottom of the unit, are connected, the trap is full, and that the line
empties into a sanitary drain. (Paragraphs 6.2.2 & 6.6.4)
9.2.3 Mixing Box
Damper (if equipped)
 If the installation has a mixing box with two dampers, adjust damper linkage.
(Paragraph 6.4.5.1)