Form I-X, P/N 150491 R7, Page 23
DANGER: The gas burner in this gas-red equipment is designed and equipped to
provide safe, complete 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 incomplete combustion which produces carbon monoxide,
a poisonous gas that can cause death. Safe operation of indirect-red gas burning
equipment requires a properly operating vent system which vents all ue 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 in
Paragraph 2.2. 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. Indoor units installed in a conned space must
be supplied with air for combustion as required by Code and in Paragraph 2.2 of
this heater installation manual. MAINTAIN THE VENT SYSTEM IN STRUCTURALLY
SOUND AND PROPERLY OPERATING CONDITION.
4) Thermostat calls for heat, energizing the ignition controller and the pilot gas
valve, lighting the pilot. NOTE: If the ame is extinguished during main burner
operation, the safety switch closes the main valve and recycles the spark
gap. If pilot is not established within 120 seconds (approx.), the unit locks
out. At 60-minute intervals, the controller will retry to establish pilot or may be
reset at any time by interrupting the power to the control circuit (See Lighting
Instructions).
5) The sensing probe proves the presence of the pilot ame.
(a) De-energizing the ignitor; (b) Energizing the gas valve.
6) Blower motor operates from fan time delay.
7) Set the thermostat switch at lowest setting for shutdown. Blower motor remains
on as determined by fan time delay.
9.3 Check
installation after
startup
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 re.
Observe burner ame at full re. Natural gas ame should be about 1-1/2" in height
with blue coloring. Propane gas ame 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 8.6.2.
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.
Place "Literature Bag" containing Limited Warranty Card, this booklet, and any
optional information in an accessible location near the heater. Follow the instruc-
tions on the bag
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