Form RZ-NA-I-FT, Mfg No. 173473 Rev 8, Page 15
DANGER: The gas burner in this gas-fired equipment is designed and equipped to provide safe and
economically 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 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 in Paragraphs 6 and
7. 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 confined space must be supplied with air for combustion as required by
Code and in Paragraph 7 of this heater installation manual. MAINTAIN THE VENT SYSTEM IN
STRUCTURALLY SOUND AND PROPERLY OPERATING CONDITION.
Check installation after start-up:
Vent System Testing Procedure
1. Seal any unused openings in the venting system.
2. Inspect the venting system for proper size and horizontal pitch, as required in the National Fuel Gas Code,
ANSI Z223.1 or CAN/CGA B149.1and B149.2, Installation Code for Gas Burning Appliances and Equip-
ment, and this manual. Determine that there is no blockage or restriction, leakage, corrosion and other defi-
ciencies which could cause an unsafe condition.
3. In so far as practical, close all building doors and windows and all doors between the space where the heater
is and other spaces of the building. Turn on clothes dryers and exhaust fans, such as range hoods and bath-
room exhausts, so they shall operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace
dampers.
4. Light the heater following the lighting instructions. Adjust the thermostat for continued operation. Verify that
combustion products are venting properly. After determining that the heater vents properly, return doors,
windows, exhaust fans, and fireplace dampers to their previous conditions. If improper venting is observed,
the venting system must be corrected.
With the unit in operation, measure manifold gas pressure. See Paragraph 12.
Turn the unit off and on, pausing two minutes between each cycle. Observe for smooth ignition.
Place the "Owner's Envelope" containing the Limited Warranty, this booklet, and any control or optional
information in an accessible location near the heater. Follow the instructions on the envelope.