DUALAIR® HEATING AND COOLING UNITS INSTALLATION OPERATION AND SERVICE MANUAL
SECTION 16: REMOVAL AND REPLACEMENT PARTS
See warnings and notes on Page 28, Section 13 before removing or replacing parts.
Burner Components
All serviceable burner parts are accessed by the door on the side of the heater.
See Page 5, Section 4.
16.1 Gas Valve
The VR4605 gas valve is fitted with the V7335A Modureg regulator (P/N L512) supplied as a separate component.
Figure 17: Standard Regulator Removal
Sealing |
Washer |
Remove Standard |
Regulator |
When replacing the gas valve, the Modureg will | Fit the Modureg ensuring that the rubber seal is in |
need to be fitted on site. To fit the Modureg, remove | place and the two screws are tight. See Page 36, |
the standard regulator by removing the two screws | Section 16.1.1. Once fitted follow commissioning |
retaining the rubber sealing washer. See Page 36, | procedure in Section 11. |
Figure 17 |
|
16.1.1 Gas Valve Replacement - (all models)
Rubber
Seal
| Modureg Modulating |
| Regulator |
Description | Part Number |
Gas Valve VR4605 | 90033404 |
Ignition Control | 90434020 |
Step 2
Unscrew valve from the
burner manifold
or
unscrew the screws for
the inlet and outlet flanges.
Step 1
Unscrew gas pipe from the valve inlet.
Ignition
Control
16.1.2 Gas Valve Replacement continued- (all models)
Replace in reverse order. Verify that the gas flow direction of the valve is correct.
See Page 23, Section 11.4.2.
IT IS IMPORTANT THAT ONLY THE CORRECT GAS VALVES SPECIFIED FOR EACH MODEL TYPE ARE USED WHEN REPLACING THESE CONTROLS.
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