Maintenance of Your Water Heater

Temperature and Pressure Relief Valve

Explosion Harzard

• Temperature-pressure relief valve must comply with ANSI Z21.22-CSA 4.4 and ASME code.

• Properly sized temperature- pressure relief valve must be installed in opening provided.

• Can result in overheating and excessive tank pressure.

• Can cause serious injury or death.

Manually operate the temperature and pressure relief valve at least once a year to make sure it is working

properly. To prevent water damage, the valve must be pro- perly connected to a discharge line which terminates at an adequate drain. Standing clear of the outlet (discharged water may be hot), slowly lift and release the lever handle on the temperature and pressure relief valve to allow the valve to operate freely and return to its closed position. See Figure 23. If the valve fails to completely reset and continues to release water, immediately shut off the manual gas control valve and the cold water inlet valve and call a qualified technician.

TEMPERATURE AND PRESSURE

RELIEF VALVE

MANUAL RELIEF

VALVE

DISCHARGE LINE TO DRAIN

FIGURE 23.

Replacement Parts

IMPORTANT: The following maintenance procedures are for the FVIR System components and should be performed by a qualified technician.

Replacement parts may be ordered through your plumber or the local distributor. Parts will be shipped at prevailing prices and billed accordingly. When ordering replacement parts, always have the following information ready:

1.model, serial, and product number

2.type of gas

3.item number

4.parts description

See Repair Parts Section for a list of available repair parts.

Removing the Manifold/Burner Assembly

1. Turn off the gas supply to the water heater at the manual
	gas shut-off valve. This valve is typically located beside
	the water heater. Note the position of the shut-off valve in
	the open/on position then proceed to turn it off (Figure 3).
2.	Disconnect power supply to the heater.
3.	Remove the outer door. Remove the 2 screw securing
	the manifold door assembly to the skirt.
4.	Disconnect all wiring connectors from the gas control
	valve/thermostat (Figure 24). Disconnect the manifold
	tube at the gas control valve/thermostat.

Gas Control Valve/

Thermostat

Manifold Tube
		Pressure
Power Supply		Switch / Fan,
Transformer		FV Sensor
Connector	Igniter/Flame	Connector
	Sense	Control Display,
	Connector	Control Display,
	Connector	Anode Rod
		Anode Rod
		Connector

FIGURE 24.

Removing the Burner from the Manifold/ Burner Assembly

Natural Gas Burner

1.Take off the burner by removing the two (2) screws located underneath the burner.

2.Check the burner to see if it is dirty or clogged. The burner may be cleaned with soap and hot water (Figure 25).

5.	Grasp the manifold tube and push down slightly to free
	the manifold from the gas control valve/thermostat.
6.	Carefully remove the manifold assembly from the burner
	compartment. NOTE: Be sure not to damage internal
	parts (Figure 28).
7.	Check the burner to see if it is dirty or clogged. The
	burner may be cleaned with soap and hot water.