Reznor RPB Unit Installation Manual - Manual (Page 35)

Form I-RPB, P/N 131782 R12, Page 35
e) If either c) or d) above indicate a leak, locate leak by brushing a soapy solution
on all fittings. Bubbles will appear at a leak. Repair and repeat tests.
 Check to make sure that flue discharge openings are free from obstructions.
9.3 Check
Installation After
Startup
Operating Sequence
1) Set the thermostat switch at its lowest setting.
2) Turn on power, main and manual gas valves.
(a) Firing rate is controlled by the thermostat.
(b) Blower motor operates from fan time delay.
3) Set thermostat switch at desired setting.
4) Thermostat calls for heat
(a) The venter motor is energized after 15-second (approximate) time delay.
(b) Venter flow switches from N.C. to N. O. contacts, energizing the pilot gas
valve and spark gap to produce a pilot flame on each operating cycle. The
sensing probe proves the presence of the pilot flame and energizes the safety
switch portion of the control. The switch action de-energizes the spark gap and
energizes the main valve. The main gas ignites and the unit fires at full rate.
5) If the flame is extinguished during main burner operation, the safety switch
closes the main valve and recycles the spark gap. On a unit equipped with
a controller with lockout, if the pilot is not established within 120 seconds
(approximately), the unit locks out for one hour, unless reset by interrupting the
power to the control circuit (See Lighting Instructions).
□
With the unit in operation, measure manifold gas pressure. Manifold pressure for
natural gas should be 3.5" w.c. and 10" w.c. for propane gas. See Paragraph 6.1.
□
Turn the unit off and on, pausing two minutes between each cycle. Observe for
smooth ignition. On two-stage or modulating burner systems, manipulate tempera-
ture adjustment slowly up and down to see if control is sequencing or modulating
properly. Raising temperature setting drives burner on or to full fire.
□
Observe burner flame at full fire. Natural gas flame should be about 1-1/2" in
height with blue coloring. Propane gas flame should be approximately the same
length with blue coloring. Yellow tipping may appear on propane gas. If yellow
extends beyond 1/2 to 3/4", adjust air shutters. See Paragraph 8.4.
□
Close all panels tightly. With the heater on, check limit control by completely block-
ing off distribution air. The limit control should open within a few minutes, shutting
off the gas supply to the main burners.
□
Return all instruction forms and warranty information to the "Owner's Envelope".
Keep for future reference.
9.2 Startup  Turn electric and gas supply on to the furnace. Adjust the thermostat or ductstat
so that a call for heat exists. Observe for complete sequencing of safety pilot and
ignition.
DANGER
The gas burner in this gas-fired equipment is designed and equipped to provide safe, com-
plete combustion. However, if the installation does not permit the burner to receive the
proper supply of combustion air, complete combustion may not occur. The result is incom-
plete combustion which produces carbon monoxide, a poisonous gas that can cause death.
Safe operation of indirect-fired gas burning equipment requires a properly operating vent
system which vents all flue products to the outside atmosphere. FAILURE TO PROVIDE
PROPER VENTING WILL RESULT IN A HEALTH HAZARD WHICH COULD CAUSE SERIOUS
PERSONAL INJURY OR DEATH.
Always comply with the combustion air requirements in the installation codes and instruc-
tions. Combustion air at the burner should be regulated only by manufacturer-provided
equipment. NEVER RESTRICT OR OTHERWISE ALTER THE SUPPLY OF COMBUSTION AIR
TO ANY HEATER.