Service manual

UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL
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front tubes which may indicate burner over firing or
persistently low air flows.
13.5 Gas Valve Maintenance
No regular maintenance is required on this device.
To change gas control valves,
See Page 45, Section
15.1.
Do not repair or disassemble gas valve.
Replace faulty gas valves with replacement parts
sold and supplied by Addison.
13.6 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.
See Page 49, Section 15.6. Ensure that the fan is
free to run and that the fan wheel is clean.
13.7 Venting and Air Intake Pipe
Inspect all venting and air intake pipe. Ensure that
all seams are sealed and suspension points secure.
Repair suspension points if any part of the venting
or combustion air pipe is sagging. Check to make
sure any insulation is not missing or in poor
condition. Replace as necessary. Check all venting
and air intake components to ensure they are in
good condition, gas tight and corrosion-free.
13.8 Maintenance Checklist
Installation Code and Annual Inspections: All
installations and service of ADDISON
®
equipment
must be performed by a contractor qualified in the
installation and service equipment sold and supplied
by Addison and conform to all requirements set forth
in the ADDISON
®
manuals and all applicable
governmental authorities pertaining to the
installation, service, operation and labeling of the
equipment.
To help facilitate optimum performance and safety,
Addison recommends that a qualified contractor
conduct, at a minimum, annual inspections of your
ADDISON
®
equipment and perform service where
necessary, using only replacement parts sold and
supplied by Addison.
Annual Fall Start Up Follow entire start-up procedure at this time and check control settings and
operation.
The Vicinity of the Heater Do not store or use flammable objects, liquids or vapors near the heater.
Immediately remove these items if they are present.
See Page 6, Section 3.
Vehicles and Other
Objects
Maintain the clearances to combustibles.
Do not hang anything from, or place anything on, the heater.
Make sure nothing is lodged in between the heat exchanger or in the louvers.
Immediately remove objects in violation of the clearances to combustibles.
See Page 7, Section 4.
Vent Pipe/Terminals Venting must be intact. Using a flashlight, look for obstructions, cracks on the
pipe, gaps in the sealed areas or corrosion.
The area must be free of dirt and dust.
Remove any carbon deposits or scale using a wire brush.
If the vent terminal has a screen built in, remove any dirt, dust or deposits
from the screen.
See Page 15, Section 7 through Page 22, Section 8.
Cabinet Exterior After installation, touch up scratches. Periodic painting should be done there-
after as required. Warning labels and logo labels should be legible and accu-
rate. Please contact Addison or ADDISON
®
independent distributor if you
need replacement warning labels or logo labels.
See Page 2, Figure 1 through Page 4, Figure 3.