Roberts Gorden DAT90 Burner Components, See Page 5, Section, Gas Valve, See Page 23, Section

SECTION 16: REMOVAL AND REPLACEMENT PARTS

SECTION 16: REMOVAL AND REPLACEMENT PARTS

See warnings and notes on Page 27, 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 need	Fit the modureg ensuring that the rubber seal is in
to be fitted on site. To fit the modureg, remove the	place and the two screws are tight. See Page 35,
standard regulator by removing the two screws	Section 16.1.1. Once fitted follow commissioning
retaining the rubber sealing washer. See Page 35,	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. Re-use the "O" ring seal in the outlet flange where fitted. Check that all the joints are leak free. Reset gas valve.

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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