UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL
SECTION 14: REPLACEMENT PARTS
WARNING
Explosion Hazard
Installation, service and annual inspection must be done by a contractor qualified in the installation and service of
Turn off gas and electrical supplies before performing service or maintenance.
Failure to follow these instructions can result in death, injury or property damage.
See warnings and notes on Page 35, Section 12 before removing or replacing parts.
Burner Components
All serviceable burner parts are accessed by the door on the side of the heater. Remove the sheetmetal screws.
14.1 Gas Valve
Remove the gas supply pipe at the heater inlet. Follow steps in Section 14.2 and Section 14.2.1 to remove gas valve/manifold.
Replace in reverse order. Verify that the gas flow direction of the valve is correct. Use a minimum amount of gas seal on the thread joint. Check that all the joints are leak free. Reset gas valve. See Page 31, Section 10.2.2.
IT IS IMPORTANT THAT ONLY THE CORRECT GAS VALVE IS USED WHEN REPLACING THESE CONTROLS.
NOTE: Seperated combustion | |
model shown. | |
Flexible Air Duct |
|
½PSI |
|
| C |
IN |
|
| ON |
| OFF |
Description | Part Number |
Gas Valve, NG (Models UHA[X][S] 30 - 45) | 90034500 |
Gas Valve, LP (Models UHA[X][S] 30 - 45) | 90034600 |
Gas Valve, NG (Models UHA[X][S] 60 - 125) | 90032505 |
Gas Valve, LP (Models UHA[X][S] 60 - 125) | 90032506 |
42 |
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