Reznor YDSA Unit Installation Manual - Manual (Page 59)

Form I-Y, P/N 273646R6, Page 59
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.
NOTE: Verify cooling
startup procedures
when the cooling
season begins.
Refer to maintenance
procedures in
Form O-Y.
10.2.1 System 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 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 electrical load. All
field 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.
 Remove compressor tiedowns and all other shipping supports and restraints.
 Verify that all field-installed options including the outside air hood, vertical vent
extension, condensate drain protection, compressor sound blanket, etc. are
installed.
 Check free rotation of condenser fans.
 If equipped with an energy recovery wheel, verify that the wheel is aligned and
rotates freely.
 Be certain optional manual reset controls (DX high pressure switch, optional high
gas pressure switch; and/or field-installed firestat) are reset.
 Verify that condensate drain(s) are open and properly trapped. Fill cooling coil
drain trap with water. See Paragraph 6.5.
 Crankcase heaters must be allowed to warm up for at least 24 hours prior to
startup. Do not startup the system until after allowing power to the crankcase
heaters for 24 hours.
10.2.2 Additional Gas
Heat Checklist Prior to
Startup:
 Verify the altitude of the installation matches the rating plate.
 Check gas piping for leaks and proper supply gas pressure. Bleed gas lines of
trapped air. (Refer to Paragraph 9.2 for supply and manifold pressures.)
a) Turn manual shutoff valve to OFF position.
b) Turn gas supply ON.
c) Observe the gas meter for movement or attach a pressure gauge readable
to 0.1" iwc and after turning gas on for ten seconds, turn gas supply off. No
change in pressure should occur over a three-minute period.
d) If either method in c) indicates a leak, locate the leak by brushing a soapy
solution on all fittings. Bubbles will appear at the leak. Repair and repeat test.
10.0 Commissioning and Startup
10.1 Preparation
and Startup
Requirements
Follow the procedures listed in Paragraphs 10.2 - 10.4 and fill in the Startup Form in
the APPENDIX, pages 68 thru 73.
IMPORTANT: Failure to maintain, misuse of the unit, or wrong
startup procedures will void the warranty
Before actual startup, become familiar with the applicable control information in Para-
graph 8.0 and test mode and fan setting procedures in Paragraph 10.3.
Perform all of the preparation checks. On startup, be prepared to check compressor
rotation to verify correct 3-phase wiring connection (Paragraph 7.1), and to set the fan
speeds (Paragraph 10.3).
DANGER
To prevent injury or death due to electrocution or contact with moving parts, lock
disconnect switch open when doing checks prior to startup.