UHD L
OW
P
ROFILE
D
UCT
F
URNACE
I
NSTALLATION
O
PERATION AND
S
ERVICE
M
ANUAL
30 of 45
SECTION 13: SERVICING
13.1 Servicing Instructions
After start-up, the heater will require maintenance to
be carried out, at a minimum, annually. If the heater
is used in a dirty or dusty area, more frequent
maintenance may be required.
IMPORTANT:
Prior to any maintenance or service of
the heater, shut off, lockout and tagout the electrical
disconnect and gas valve that supplies the unit in
accordance with OSHA regulations. After any
maintenance or repair work, always test fire the
heater in accordance with the start-up instructions
to ensure all safety systems are in working order
before leaving the heater to operate. Minor faults
may be traced by using the troubleshooting charts
IMPORTANT:
Check all gas pipes and pipe joints to
ensure there are no cracks or gas leaks. Any cracks
in the pipes or pipe joints must be repaired.
IMPORTANT:
Inspect all suspended components
and hardware. Ensure that they are in good
condition, properly tightened, and corrosion free.
13.2 Burner Maintenance
1. Open the hinged door via tooled access and
remove from the hinges. Set door aside.
2. Remove burner side panel. Electrode and
flame probe should remain attached.
3. Remove burner assembly from cabinet via four
screws, two on top and two on bottom. Clean
any deposits from the main burner which may
have formed in the injectors or venturi of the
burner.
4. Check condition of ignition electrode and flame
probe. Clean off any deposits which may have
formed, check condition of ceramic insulators.
Replace as necessary.
13.3 Heat Exchanger Maintenance
The heat exchanger will remain clean unless a
problem has developed with combustion. Inspect the
heat exchanger. Look for signs of overheating at the
front of the tubes which may indicate burner over
firing or persistently low air flows.
13.4 Gas Valve Maintenance
No regular maintenance is required on this device.
To change gas control valves,
Do not repair or disassemble gas valve.
Replace faulty gas valves with replacement parts
sold and supplied by Rapid Engineering LLC.
13.5 Flue Blower
The flue blower should not require maintenance.
However, if the air pressure switch is causing burner
lockout, then remove the flue blower from the vent
box by unscrewing the screws at the mounting plate.
Screw quantity will vary by model size. Remove the
screws attaching the mounting plate to the fan inlet
. Ensure that the fan is
free to run and that the fan wheel is clean.
Cut/Pinch Hazard
Wear protective gear
during installation,
operation and service.
Edges are sharp.
WARNING
Failure to follow these instructions can result in death, electric shock, injury or property damage.
Burn Hazard
Allow heater to cool
before service.
Tubing may still be hot
after operation.
Explosion Hazard
Turn off gas supply to
heater before service.
DANGER
Electrical Shock Hazard
Disconnect electric
before service.
Heater must be
connected to a properly
grounded electrical
source.
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