Raypak 133-4001 manual Flame Roll-OutSafety Switch, Service Burner Tray Removal

size, and connections which comply with all applicable codes.

Flame Roll-Out Safety Switch

The boiler is equipped with a cut-off device to prevent flame roll-out in the event the heat exchanger becomes blocked. This is a "manual reset" type roll- out switch, that must be reset by a service technician after any over temperature conditions have been fixed. Excessive restriction in the heat exchanger flue pas- sage may cause the switch to disable the boiler.

Fig. 45: Flame Roll-Out Safety Switch

Service

Burner Tray Removal

COMBUSTION

AIR BLOWER

AIR SHUTTER

ADJUSTMENT

GAS

VALVE

BURNER

BURNER

HOLD-

DOWN

BRACKET

Fig. 46: Low NOx Burner Tray Assembly

1.Shut-off main electrical power switch to heater.

2.Shut-off gas upstream of heater.

3.Remove front door.

4.Disconnect gas line from gas valve.

5.Remove (2) screws that mount burner tray to the base of the unit, and (2) screws that secure gas valve to jacket.

6.Disconnect wires that terminate at gas valve.

7.Unscrew (4) screws that secure the control box.

8.Disconnect pilot wire from the ignition module.

9.Disconnect wire harness from the combustion blower.

10.Carefully slide out the burner tray assembly.

11.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. 47.

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

Fig. 47: 2-Stage Gas Valve Adjustment (Invensys)

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