BOCK EzFit EZ 100-76N 사용 설명서 - 페이지 8

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SECTION V: OPERATION (cont .)

INSPECT THE INSTALLATION AND ADJUST THE CONTROLS

During the initial warm-up of the stored water, check for proper combustion by sampling

combustion gas at a point just below the exit of the flue. O

of 4.5-5.0% with CO levels at 0 ppm. Both combustion chamber access panels and insulation

(placed between panels) shall be installed when performing the combustion test. O

that greatly deviate from the specified range may lead to unsafe operating conditions.

Factors that can lead to O

levels outside of the specified range include inadequate or excess

draft caused by ambient conditions or venting, obstructions underneath the water heater

preventing sufficient flow of air to burner, and improper inlet or manifold gas pressures. For

natural gas, the manifold pressure is preset at 4.0" w.c. and the acceptable inlet pressure is in

the range of 5-14" w.c. For propane gas, the manifold pressure is preset at 10.0" w.c. and the

acceptable inlet pressure is in the range of 11-14" w.c. See the "Pre-Installation" section of this

manual for information on clearances, air supply, and venting.

The thermostat has been adjusted to 120°F at the factory. Wait until thermostat has shut

off gas to the main burner. Wait 30 seconds following shut-off of gas, then set thermostat

to the highest temperature. The main burner should relight. Set thermostat to the lowest

temperature; the main burner should go out. The thermostat should be adjusted to the

minimum setting that will meet the hot water needs of the homeowner or commercial

application.

There is a scald potential if the thermostat is set too high. The recommended temperature

setting for normal residential use is 120°F. If higher temperature settings are needed for

combined appliance applications or commercial use, an automatic tempering valve

must be installed on all domestic hot water lines.

MEASURING THE OUTCOMING WATER TEMPERATURE

The thermostat is factory set at 120°F for

domestic use. It is the responsibility of the

building owner to verify that the installer

follows the recommended quantitative testing

for measuring the outlet water temperature. To

make sure that the system works properly after

installation and in the future, it is recommended

that the heater's performance be measured and

monitored. Run water out of the tap nearest

the heater until it comes out warm. Using a

calibrated thermometer, take a measurement. If

the water is not at a suitable temperature for the

installation, have a qualified service person adjust

the temperature control. Contact Bock for further

information if needed.

This log (or a similar one) should be filled out as

follows:

Date

Time

Person running test

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readings should be in the range

readings

CAUTION

Figure 6: Approximate Temperature and

Dial Setting Relationship

Set temp °F

Outlet temp °F

Atmospheric Gas

SECTION VI: MAINTENANCE

NOTICE TO THE OWNER: If you are having a mechanical problem with your water heater,

contact your service company or installer.

WATER PIPING

On an annual basis, all piping should be checked for leakage at joints, shut-off valves, and

unions.

T&P RELIEF VALVE

On an annual basis, the temperature and pressure relief valve should be checked for proper

operation. First, attach a drain line to the valve to direct the water discharge to an open drain.

This is very important because the temperature of the discharge could be very hot. Second,

lift the lever at the end of the valve several times. The valve should operate freely and return

to its original position properly. If water does not flow out of the valve, remove and inspect

for corrosion or obstructions. Replace with a new valve if necessary. Do not repair the faulty

valve as this may cause improper operation.

ANODE RODS

Anode rods should be inspected twice in the first year and at least yearly once a time interval

for inspection has been developed. It is recommended to check the rod(s) six months after the

heater is installed. If the anode rod had reduced in size by two-thirds of its original diameter

of 3/4" or shows signs of pitting, it is time for replacement. Take the following steps when

changing the anode rod(s):

1. Shut off water supply.

2. Open any faucet to relieve tank pressure.

3. Remove caps on water heater top; push insulation aside.

4. Use a 1 1/16" six-sided socket wrench and a breaker bar. Snap hard to break the anode

rod seal.

5. Remove rod(s) and replace with new rod(s).

6. Turn water supply back on and leave faucet open until air is out of line.

7. Turn faucet off and check that new rod(s) doesn't leak.

8. Snap caps back into place.

FLUSH THE TANK

Elements in the water such as lime and iron may accumulate in the heater. Accumulation of

these elements can keep your water heater from operating at peak efficiency and may lead to

premature tank failure. It is recommended that the tank is drained and flushed thoroughly

once a year to prevent buildup.

Atmospheric Gas

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