Reliant FVIR GAS WATER HEATER Technical Information PDF herunterladen (Seite 55)

RESIDENTIAL GAS AND ELECTRIC WATER HEATER

TROUBLESHOOTING and SERVICE HANDBOOK

RELIANCE Water Heater Company Technical Training Department

Miscellaneous Residential Electric Water Heater Service Items:

Watts divided by Volts = Amps

Supply wire gauge and fuse (breaker) protection must be at least 125% of the expected

Amperage draw of the water heater.

Volts times Amps = Watts

Replace elements with elements rated at the same wattage and voltage indicated on the

heater model and rating plate. Installing an element with a higher voltage rating or wattage

output may create a safety hazard by overloading the heater wiring or supply wiring or

fusing. Installing an element with a lower wattage or voltage rating will reduce performance.

Normally, a residential electric water heater with two elements will have only one element

operate at a time. If the upper element or thermostat fails, the customer will be out of hot

water. If the lower element or thermostat fails, the customer should still have 1/3 of the

tank with hot water.

With two element heaters, the lower element and thermostat will cycle more frequently

than the upper element and thermostat. For this reason, the lower element will normally

accumulate lime faster and fail more often than the upper element. Lower thermostats will

fail more often than upper thermostats.

Replacement elements:

Replace elements with an element having the most surface area (low watt density)

available for your water heater. By spreading the heat of the element over a greater area,

lime (calcium) buildup rate should be reduced.

Elements constructed of Incoloy are much more durable than elements made of copper

with zinc coating.

Many electric utilities offer discounts if you do not use electricity during certain times of the

day. Contact them – by purchasing a larger storage water heater, with special wiring (see

A-7 wiring circuit) for time clocks or “off peak meters”, you may save on monthly operating

costs.

Element with Links

Resistance of Element in Ohms (± 7.5%)

Rated Wattage Rated

Voltage

600 750 1000 1250 1500 2000 2500

120 23.2 18.6 13.9 11.1 9.28 6.96 5.57

208 72.1 57.7 43.3 34.6 28.8 21.6 17.3

240 92.8 74.3 55.7 44.6 37.1 27.8 22.3

277 128 102 76.7 61.4 51.2 38.4 30.7

Rated Wattage Rated

Voltage

3000 3500 4000 4500 5000 5500 6000

120 4.64

208 14.4 12.4 10.8 9.61 8.65 7.85* 7.2

240 18.6 15.9 13.9 12.4 11.1 10.1* 9.28

277 25.6 21.9 19.2 17.1 15.3 14.0 12.8

480 76.8 65.7 57.5 51.1 45.7 41.8 38.4

1 2 ... 50 51 52 53 54 55 56 57 58 59 60 ... 74 75

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Reliant FVIR GAS WATER HEATER Technical Information Seite 55

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