Reznor SC Duct Furnace Unit Installation Manual - Manual (Page 34)

Form I-SC, P/N 207696 R11, Page 34
DANGER
The gas burner in this gas-fired equipment is designed and equipped to provide safe, controlled
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 separated-
combustion, indirect-fired gas burning equipment requires a sealed, 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.
Install either the horizontal or vertical combustion air/vent system illustrated in Paragraph 6.3
using the concentric adapter supplied. Always comply with the combustion air requirements in
the installation codes and instructions. 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. CHECK THE COMBUSTION AIR/VENT SYSTEM FOR
SOUNDNESS AND FUNCTION; MAINTAIN IT IN PROPER OPERATING CONDITION.
9.3 Check
installation after
start-up:
WARNING
If you turn off the power supply, turn off the gas. See Hazard Levels,
page 2.
This unit will operate with a minimum of maintenance. To ensure long life and satis-
factory performance, a furnace that is operating under normal conditions should be
inspected every four months. If the furnace is operating in an area where an unusual
amount of dust or soot or other impurities are present in the air, more frequent inspec-
tion is recommended.
The following procedures should be carried out at least annually (See Paragraphs
10.2.1-10.2.7 for instructions).

Check the gas valve to ensure that gas flow is being shut off completely.
 Clean the heat exchanger both internally and externally.
 Check the pilot burner and main burners for scale, dust, or lint accumulation.
Clean as needed.
 Check the vent/combustion air system; inspect all joints. Replace any parts that do
not appear sound.
 Check the wiring for any damaged wire. Replace damaged wiring. (See Paragraph
7.0 for wiring requirements.)
CAUTION: When cleaning, wearing eye protection is recommended.
NOTE: Use only factory-authorized replacement parts.
10.0 Maintenance
and Service
 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 8.6. If shutter adjustment
will not reduce yellowing, check for gas leaks at the control manifold or orifice
fitting.
 Turn the unit off and on, pausing two minutes between each cycle. Observe
for smooth ignition. On two-stage or modulating burner systems, manipulate
temperature adjustment slowly up and down to see if control is sequencing or
modulating properly. Raising temperature setting drives burner on or to full fire.
 Using a manometer or slant gauge readable up to 14" w.c., check orifice manifold
for operating pressure on full fire. Natural gas should be 3.5" w.c. at this point.
Propane should be 10" w.c. at this point. Variations from these pressures are not
recommended, as ignition and efficiency performance can be adversely affected
by improper pressure adjustment. See Paragraph 6.2.
 Place "Owner's Envelope" containing Limited Warranty Card, this booklet, and
any optional information in an accessible location near the heater. Follow the
instructions on the envelope.
10.1 Maintenance
Schedule
9.0 Commissioning
and Start-Up
(cont'd)