GSW JWF307, JW727 JWF657 Water Temperature Regulation, Professional Maintenance, Combustion Tests

Water Temperature Regulation

Once installed, the operation will be completely automatic. The thermostat (aquastat) on the water heater is adjustable and will maintain water at the desired temperature.

WARNING

Water temperature over 52°C (125°F) can cause severe burns instantly or death from scalds.

Children, disabled and elderly are at highest risk of being scalded.

Feel water before bathing or showering. Temperature limiting valves are recommended.

WARNING: HOT WATER CAN PRODUCE 3RD DEGREE BURNS IN 6 SECONDS AT 140oF (60OC) IN 30 SECONDS AT 130OF (54OC)

Thermostats are factory set at 49°C (120°F). Contact a qual- ified Oil-Burner Technician for adjustment. Set the tank ther- mostat as low as possible to provide an adequate supply of hot water. This will conserve oil and extend the life of the tank.

V)MAINTENANCE General

Do not attempt to repair your water heater. Call a qualified Oil-Burner Technician for service. Turn “OFF” the electric power whenever the water supply is shut off. Before calling for service, check that:

1.The heater is properly filled.

2.The electrical supply has not been interrupted.

Professional Maintenance

Except for external appearance and area tidiness, the fol- lowing steps should be performed only by a qualified Oil- Burner Technician.

1.Lift out the flue baffle to clean the flue. (On rear and com- bination flue heaters, the top cover, insulation and flue top cover must be removed.)

2.Insert a flue brush down the flue passage way(s) to remove soot and dirt. Soot or carbon that falls into the combustion chamber will burn up within a very short time.

3.In normal use, there should be no large accumulation of soot in the combustion chamber. If there is, remove the burner and carefully brush or vacuum the combustion chamber.

WARNING

Do not attempt to operate this water heater with the cold water inlet valve closed. Manually operate temperature and pressure relief valve at least once a year. Standing clear of the outlet, (discharge water will be hot), lift and release the lever handle on the temperature and pressure relief valve to make sure the valve operates freely.

Never operate the heater if it is not com- pletely filled with water. To make sure the heater is filled, open the hot faucet of an upstairs tap, until there is a full flow of water with no air coming through the tap.

Flue Pipes

Once a year, inspect the flue pipe leading from the heater to the chimney. If corrosion is evident, or discolouration at the joints can be seen, replace the flue pipes. This should be done by a qualified Oil-Burner Technician. Flue pipes must be replaced by the same size flue pipe as the flue collar (breech connection) at the heater.

Combustion Tests

Burner adjustments:

Final burner adjustments must be made using combustion test equipment to assure proper operation. Do not fire heater without water or sections will overheat.

1.Refer to burner manual for start-up.

2.Allow heater to heat to design condition.

3.Using combustion test equipment, adjust burner for:

a. CO2 between 11% and 12% and a trace of smoke

between No. 0 smoke and No. 1 smoke.

b. over-fire draft -0.01 to -0.02 in. (-0.254 to -0.508mm) water column draft in combustion chamber (+0.25 in. (+6.35mm) for JWF307V).

NOTE: For JWF307V also see additional “Installation Instructions for Through-the-wall Venting Components", 63391, that is supplied with the JWF307V.

General Maintenance (by owner)

As a precaution against fire, and to maintain an adequate flow of combustion air to the heater:

•Keep the appliance area clear and free from com- bustible material, gasoline and other flammable vapors and liquids.

•Keep the air ventilation openings unobstructed. If dust and lint is seen accumulating around the openings, remove it.

•Do not pile cartons, papers, or combustible materials on top, or near the heater (see Figure 1).

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