Reliant FVIR GAS WATER HEATER Technical Information PDF herunterladen (Seite 18)

RESIDENTIAL GAS AND ELECTRIC WATER HEATER

TROUBLESHOOTING and SERVICE HANDBOOK

RELIANCE Water Heater Company Technical Training Department

If there has been a flammable vapor ignition, a qualified service agent needs to inspect the arrestor

for cracks. The arrestor is not a replaceable part – the heater would need to be replaced.

Possible service issues associated with the flame arrestor.

Poor combustion – yellow flame, sooting, possible carbon monoxide production.

Pilot outage due to lack of oxygen. Continued pilot outage or finding that the LDO screen(s) is

heavily blocked would warrant inspection of the flame arrestor.

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.

COMBUSTION CHAMBER TEMPERATURE SENSOR

The C3 Technology water heaters will come equipped with a thermal cutoff (TCO) device that is

integral with the thermocouple. Temperature cutoff points range from 160°C to 200°C depending on

model. The TCO is an automatic reset thermal switch. When activated it will open the

thermocouple circuit and shut off the main and pilot burner gas flow. The pilot would have to be relit

after the TCO has had sufficient time to cool down (sensor is below 120 degrees F).

The TCO performs two primary functions:

In the event of flammable vapor ignition inside the combustion chamber, it senses the

corresponding increase in temperature and shuts off gas flow to the main and pilot burners.

If excessive temperatures inside the combustion chamber indicate poor combustion due to

a clogged LDO screen or inadequate air for combustion, the TCO will shut off gas flow to

the main and pilot burners.

SERVICE:

There is no routine service associated with the TCO. The standard thermocouple millivolt output checks

described in this service handbook still apply. Millivolt readings indicate that the TCO is closed. An open

TCO (within a cool chamber) would indicate that the assembly must be replaced.

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 74 75

Keine Kommentare

Reliant FVIR GAS WATER HEATER Technical Information Seite 18