GSW Gas Fired Water Heater Manuale Utente

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Water Temperature Regulation

The thermostat is adjusted to its lowest temperature position when

shipped from the factory. The temperature of the water can be

selected by setting of the temperature dial on the front of the gas

control. The “LOW” position on the thermostat is the preferred

starting point for setting the temperature/control knob

(approximately 120

F(50

C)). Energy conservation is a

consideration when selecting the water temperature setting.
HIGHER SETTING INCREASES THE RISK OF SCALD
INJURY
In households with children, the elderly or handicapped persons,

select a lower temperature setting. To reduce the risk of scalding,

valves for reducing the point of discharge water temperature by

mixing the branch water lines are available. Please consult a

licensed plumbing authority.

Performance Checks

1.Burner Manifold Pressure - The burner operates at a manifold

gas pressure of 3.5” W.C. for natural gas and 10.0” W.C. for

propane gas. A

” N.P.T. port is provided on the gas valve

control for connection to a gauge to measure the pressure. The

control valve has an internal pressure regulator. Do not confuse

the manifold pressure with the supply inlet pressure. Return port

plug upon completion of tests.

2.Checking Input - Never exceed input shown on the rating plate.

Ask your gas supplier for the heating value of the gas you are

using. Check the input by ”clocking” the gas meter. Make sure

no other appliances are operating when the test is being done.

To ensure accuracy, clock enough gas so that the time is greater

than 60 seconds. Use the following formula to check input.

Check that your gas pressures are as previously stated.

3.Checking burner flame - Water Heaters may use either a sheet

metal or cast iron burner. Access the burner by lifting off the

outer gas door and sliding open the inner door located at the

bottom of the water heater.

• For water heaters having a sheet metal burner and burning

natural gas, a constant, steady, soft blue flame should be visible

coming from the burner head.

• For water heaters having a sheet metal burner and burning

propane gas, the flame will be a constant, steady blue with a

brighter blue being visible right at the burner head. The very

ends of the flame may be tipped with yellow. This is more

noticeable on higher input units.

• Noisy, hard blue flames, flames lifting from the burner, luminous

or yellow stringy flames indicate an incorrect setup. Check that

the unit is using the correct gas. This information is on the rating

plate and the label on the side of the gas valve control. Poor

flames can also be caused by incorrect gas pressures or burner

orifice size, inadequate or contaminated air, a restriction in the

venting system, or dirt entering the gas supply. These conditions

must be corrected to prevent a possible safety hazard.

• For units with cast iron burners, the flame presentation should

be the same as sheet metal burners. Adjustment is possible on

cast iron burners by changing the air shutter position on the

burner inlet. If the flame needs adjusting, loosen the two screws

and move the shutter. See Figure 8. If it is too far open, the

flame will lift off the burner or will be noisy; if it is closed too far,

the flame will be luminous and yellow. Once proper flame is

obtained, tighten the screws to secure the air shutter.

NOTE:

There is no means for flame adjustment on sheet metal

burners as they are self-adjusting.

IMPORTANT:

Always return the burner doors

to their original position.

ALWAYS KEEP THE AREA AROUND THE WATER

HEATER CLEAR OF COMBUSTIBLE MATERIALS.

NEVER RESTRICT THE FLOW OF AIR TO THE

WATER HEATER.

VII) SERVICE AND MAINTENANCE

This section describes the routine service
instructions to properly maintain your heater and
venting system.

Not Enough or No Hot Water

• Check that the water heater is operational.

• Relight the pilot burner if necessary.

• Check that the thermostat is set high enough.

• Check that you have not just run out of hot water due to heavy

demand. If this is a routine problem, it may indicate an under-

sized water heater.

• Have your gas company check input rate and water heater

operation.

• The E.C.O. may have tripped open. See E.C.O. below.

Energy Cut-off Control (E.C.O.)

This water heater is equipped with a control which has a built in

E.C.O. (Energy Cut-Off). The E.C.O. will shut the gas off, should

the outlet water temperature exceed maximum temperatures. If

the E.C.O. has tripped, the entire gas valve/temperature control

must be replaced. For gas valve/temperature control

replacement, contact your local gas utility, or a qualified service

technician. The replacement control must be an approved

equivalent model to the control which has been removed.

Water Temperature is Too Hot

• Check that thermostat setting is not too high.

• Water heaters used for dishwashers, space heating or laundry

facilities generally require higher temperatures than domestic

use. Install anti-scald tempering valves as instructed in the

safety warnings.

• If the problem persists, contact your dealer or gas supplier.

Hot Water Odour

On occasion, and depending on your location, hot water may

develop a strong odour. This can be especially problematic in

regions where the water contains some sulphur, which results in

hot water having a “rotten egg” smell.

If this occurs, drain the system completely, flush thoroughly and

refill. If the problem persists, the anode rod may need to be

changed from magnesium to one made of aluminum. In certain

cases chlorination and flushing of the water heater may be

required. Contact you dealer or water supplier.

Input

Gas Heating Value* x Cubic Feet(Meters) clocked

(BTU/Hour) =

Seconds clocked/3600

*Gas Heating Value in BTU/cubic feet or cubic meters
1 cubic meter = 35.31 cubic feet

GOOD BLUE
FLAMES

Figure 8