Reliant FVIR GAS WATER HEATER Technical Information PDF herunterladen (Seite 13)

RESIDENTIAL GAS AND ELECTRIC WATER HEATER

TROUBLESHOOTING and SERVICE HANDBOOK

RELIANCE Water Heater Company Technical Training Department

Electrical Testing– continued

Millivolt dropout test through copper magnet winding and ECO (Emergency Cut Off)

Procedure: Move meter probe to upper ECO solder joint and ground

If … … then

reading of at least 10 MV is not present replace the control valve.

reading of more than 10 MV is present but,

gas to the pilot shuts off each time knob is

released

replace the control valve.

Safety drop out test – the safety gas shutoff

should interrupt gas through

the valve when MV current

drops to 1-3 MV.

Procedures:

Meter still connected to upper ECO solder joint and

ground.

Turn Top Knob to “off” position

Millivolt output will decrease as thermocouple cools

If… … then

internal safety does not activate between 1

and 3 MV (you will hear a “click” inside the

valve)

replace the control valve.

*internal safety does activate between 1 and

3 MV

valve is within tolerance and will interrupt gas

flow if pilot looses heat or ECO opens.

*Note: A “click” sound should be heard from the valve as the main gas interrupter snaps up to the

“closed” position.

Condensation

Flue gas products contain moisture. If these flue gas products are cooled to their “dew point”,

they become visible moisture – condensation.

Flue gas may become cooled by:

Cold supply air temperatures

Cool surfaces – generally, if tank water temperatures drop below 110 F, the flue pipe surface

and/or bottom tank head will be cool enough to cause condensation.

Increased combustion efficiency – higher thermal efficiency means that an increased amount

of heat is transferring from the flue gas into the water. If you transfer (approximately) 87.5%,

or more, the moisture in the flue gas will condense.

TO GROUND

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Reliant FVIR GAS WATER HEATER Technical Information Seite 13