Raypak 1334001 burner Tray Removal, Gas Valve Removal, Reverse above procedure to re-install

COMBINATION FLAME SENSOR/ IGNITER AND PILOT BURNER

Fig. 38: Typical Burner Tray Illustrated

burner Tray Removal

1.Shut-off power and gas supply to the heater. Disconnect union(s) and pilot tubing, then loosen and remove burner hold-down screws.

2.Disconnect wires at gas valve and slide burner drawer out.

Gas Valve Removal

1.Shut-off gas supply to the heater. Remove gas pip- ing to gas valve inlet.

2.Disconnect wires, pilot tubing and bleed line, if required.

3.Turn vertical gas pipe from manifold slightly and unscrew gas valve.

4.Reverse above procedure to re-install.

Gas Valve Adjustment - Robertshaw (Invensys) 7000 Series 2-Stage Gas Valve with Solenoid Valve

NOTE: Attach a manometer and check the manifold pressures –both high fire and low fire– before making any adjustments.

1.Turn the heater off.

2.Remove the 3/8” nut or the #10 Torx screw.

3.Lift solenoid valve up, keeping the wires connect- ed to the solenoid valve.

4.If only low fire adjustment is needed, go to Step 9.

5.Using a 3/8” wrench, carefully remove the alu- minum cap that was under the solenoid valve-count # of turns when removing the cap. Be careful not to drop the cylinder (weight) or the small spring that is under the cap –see Fig. 39.

6.Remove the spring and store in a safe place.

7.Using an Allen wrench, turn the screw clockwise to increase or counterclockwise to decrease high fire manifold pressure –see Fig. 39.

8.Install the spring, weight and aluminum cap –tight- en the cap using same # of turns as was used in removing the cap.

9.For low fire adjustment, tighten the aluminum cap to increase and loosen to decrease low fire mani- fold pressure.

10.Install 2-stage solenoid valve and turn heater on, check manifold pressures.

11.Repeat steps 3 to 10 until correct manifold pres- sures are obtained.

12.Secure 2-stage solenoid valve by tightening the 3/8” nut or #10 Torx screw.

Fig. 39: 2-Stage Gas Valve Adjustment (Invensys)

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