Reznor UEAS Unit Installation Manual - Manual (Page 35)

12.0 Maintenance
and Service
The material contained in the MAINTENANCE AND SERVICE Section of this man-
ual is designed to aid a qualified service person in maintaining and servicing this
equipment. This heater will operate with a minimum of maintenance. To ensure
long life and satisfactory performance, a heater that is operated under normal con-
ditions 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.
12.1 Maintenance
Schedule
The following procedures should be carried out at least annually (See FIGURE 28,
page 37, and Paragraphs 12.2.1 - 12.2.16.):
• Clean all dirt, lint, and grease from the combustion air opening and venter
assembly.
• Clean all dirt, lint, and grease from the fan blade, fan guard, and motor.
• Clean the condensate traps.
• Check the heat exchanger both internally and externally.
• Check the burner for scale, dust, or lint accumulation. Clean if needed.
• Check gas valve to ensure that gas flow is being shutoff completely.
• Check the 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
Paragraph 8 for replacement wiring requirements.)
NOTE: If replacement parts are required, use only factory-authorized parts.
12.2 Maintenance
Procedures
12.2.1 Heat Exchanger Maintenance
This heater has a
T
CORE
3
® heat exchanger (patent pending).
Remove any external dirt or dust accumulation. Visually check the heat exchanger
for cracks and holes. If a crack or hole is observed, replace the heat exchanger. A
T
CORE
3 ® heat exchanger has a primary and a secondary heat exchanger; check
both sections.
NOTE: Inspection of the lower portion of the heat exchanger is done with the
burner removed. See the Burner Service section below for information on inspect-
ing the lower portion of the heat exchanger.
Always comply with the combustion air requirements in the installation codes.
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. MAINTAIN THE VENT/COMBUSTION AIR
SYSTEM IN STRUCTURALLY SOUND AND PROPER OPERATING CONDITION.
12.2.2 Burner
Maintenance
This heater is equipped with a
T
CORE
2
® burner.
Inspect the burner/control compartment annually to determine if cleaning is neces-
sary. If there is an accumulation of dirt, dust, and/or lint, clean the compartment
and follow the instructions below to remove and clean the burner.
CAUTION: Use of eye protection is recommended.
1. Outside the cabinet, shut the gas supply off at the manual valve ahead of the
union.
2. Turn off electric supply.
3. Disconnect the gas supply at the union outside of the cabinet.
4. Remove the access panel.
Burner Removal
Instructions (Refer to
FIGURE 27.)
WARNING
If you turn off the
power supply, turn off
the gas. See Hazard
Levels, page 2.
Form I-UEAS, P/N 221232 R13, Page 35