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CTCU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL
28 of 42
heat exchanger. Look for signs of overheating at the
front tubes which may indicate burner over firing or
persistently low air flows.
13.5 Gas Control Valve Maintenance
No regular maintenance is required on these
devices. To change gas control valves, See Page
36, Step 16.1.
Do not repair or disassemble on site.
Replace faulty gas valves with genuine
replacement parts sold and supplied by
Roberts-Gordon.
13.6 Flue Fan
The flue fan should not require maintenance.
However, if the air pressure switch is causing burner
lockout, then remove the flue fan from the vent box
by unscrewing the screw at the outlet flange and the
flue fan mounting plate (See Page 39, Section 16.4
through Page 40, Section 16.5). Ensure that the fan
is free to run and that the fan wheel is clean.
13.7 Maintenance Checklist
Installation Code and Annual Inspections: All
installations and service of ROBERTS GORDON
®
equipment must be performed by a contractor
qualified in the installation and service equipment
sold and supplied by Roberts-Gordon and conform
to all requirements set forth in the ROBERTS
GORDON
®
manuals and all applicable
governmental authorities pertaining to the
installation, service and operation of the equipment.
To help facilitate optimum performance and safety,
Roberts-Gordon recommends that a qualified
contractor conduct, at a minimum, annual
inspections of your ROBERTS GORDON
®
equipment and perform service where necessary,
using only replacement parts sold and supplied by
Roberts-Gordon.
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.
Maintain the clearances to combustibles.
Do not hang anything from, or place anything on, the heater.
Immediately remove objects in violation of the clearances to combustibles.
See Page 5, Section 3.
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 16, Section 8.
Combustion Air Intake
Pipe
Intake pipe and inlet must be intact. Look for obstructions, cracks on the pipe,
gaps in the sealed areas or corrosion.
The area must be free of dirt and dust.
Clean and reinstall as required.
Heat Exchanger Make sure there are no cracks.
Make sure there is no sagging, bending or distortion.
Clean or replace as required.
Gas Line and Shut-off
Valves
Check for gas leaks.
See Page 17
, Section 9.