Thomas & Betts UDAS, UDAP Startup cont’d, MAINTENANCE AND SERVICE 25.Maintenance Schedule

24.Startup (cont’d)

οTurn the unit off and on, pausing two minutes between each cycle. Observe for smooth ignition.

οPlace 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.

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 indirect-fired gas burning equipment requires a properly operating vent system that 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 Paragraph

9.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. Model UDAP units installed in a confined space must be supplied with air for combustion as required by Code and in Paragraph 9 of this heater installation manual.

MAINTAIN THE VENT OR VENT/COMBUSTION AIR SYSTEM IN STRUCTURALLY SOUND AND PROPER OPERATING CONDITION.

MAINTENANCE AND SERVICE

25.Maintenance Schedule

NOTE: If replacement parts are required,

use only factory-authorized parts.

WARNING: If you turn off the power supply, turn off the gas. See Hazard Levels, page 2.

The material contained in the MAINTENANCE AND SERVICE Section of this manual is designed to aid a qualified service person in maintaining and servicing this equipment. This heater will operate with a minimum of maintenance. To en- sure long life and satisfactory performance, a heater that is operated under normal conditions should be inspected and cleaned at the start of each heating season. If the heater is operating in an area where an unusual amount of dust or soot or other impurities are present in the air, more frequent maintenance is recommended.

When any service is completed, be careful to reassemble correctly to ensure that no unsafe conditions are created. When re-lighting, always follow the lighting instructions on the heater.

Maintenance Schedule - The following procedures should be carried out at least annually (See FIGURE 18 and Paragraphs 26-39.):

•Clean all dirt, lint, and grease from the combustion air opening (UDAP) and venter assembly.

•Clean all dirt, lint, and grease from the fan blade, fan guard, and motor.

•Check the heat exchanger both internally and externally.

•Check the burner for scale, dust, or lint accumulation. Clean if needed.

•Check the vent or vent/combustion air system for soundness. Clean openings. Replace any parts that do not appear sound.

•Check the wiring for any damaged wire. Replace damaged wiring. (See Para- graph 14 for replacement wiring requirements.)

Form RZ-NA I-UDA, P/N 195673 Rev 5, Page 28