Reliant FVIR GAS WATER HEATER Technical Information download pdf (Page 19)

RESIDENTIAL GAS AND ELECTRIC WATER HEATER

TROUBLESHOOTING and SERVICE HANDBOOK

RELIANCE Water Heater Company Technical Training Department

The TCO is an integral part of the thermocouple and not replaceable as a separate item. A pilot burner

assembly must be reinstalled. On repeated calls of no hot water or pilot outage, a clogged/dirty LDO screen

might be the cause and should be checked. Keep in mind this TCO will shut off the pilot and main burner

when activated.

With the different cutoff temperature set-points of TCO devices for different model water heaters, it is

important that the correct part is used when replacement of the pilot burner assembly is necessary.

Possible service issues associated with the Thermal Cut Off switch being opened:

Pilot outage due to increased combustion chamber temperatures below the main burner. This may

open the automatic reset, thermal cut off switch (TCO).

The flame arrestor having contained a flammable vapor ignition. The TCO will open and the chamber

and arrestor should be inspected by a qualified service agent.

ONE PIECE PILOT BURNER ASSEMBLY

C3 Technology models feature a "one piece" pilot burner assembly. This assembly will be covered

under a minimum 6 year parts warranty on all C3 Technology models, 10 years on premium models.

There are five main components that make up this pilot assembly:

1. Thermocouple with integral Thermal Cut Off switch (TCO).

2. Pilot burner w/orifice and tubing

3. Piezo igniter cable

4. Pilot assembly seal/grommet (orange).

5. An inner door gasket (white) will also be included.

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Reliant FVIR GAS WATER HEATER Technical Information Page 19