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USERS OF THIS APPLIANCE SHOULD BE AWARE THAT GAS
COMPONENTS WEAR OUT OVER A PERIOD OF TIME.  THE
GAS CARRYING COMPONENTS OF THIS APPLIANCE SHOULD
BE INSPECTED FOR PROPER OPERATION PERIODICALLY BY
A QUALIFIED SERVICE TECHNICIAN.

MAIN BURNER

Check main burner every 12 months for proper flame
characteristics.  This is done by removing door(s) on heater,
see Figure 1.  The main burner should provide complete
combustion of gas; ignite rapidly; give reasonably quiet operation;
cause no excessive flame lifting from burner ports.  Make sure
that the flow of combustion and ventilation air is not blocked.

If proper flame characteristics are not evident, check for
accumulation of lint or other foreign material that restricts or
blocks the air openings in the heater or burner.  Also check
AIR REQUIREMENTS.

  

WARNING

SOOT BUILD-UP INDICATES A PROBLEM THAT REQUIRES
CORRECTION BEFORE FURTHER USE. CONSULT WITH A
QUALIFIED SERVICE TECHNICIAN.

Should the main burner or burner air openings require cleaning,
turn the blower switch to “OFF” position and allow the burner to
cool. Remove the burner and clean with a soft brush. Clean
main burner orifice with a suitable soft material.

HIGH TEMPERATURE LIMIT SWITCH

(Single-Use Type Energy Cut Off)

The thermostat has a built-in limit switch which will actuate in
case of excessive water temperatures. The heater cannot be
relit until the gas control valve is replaced. It is important that a
serviceman be called to determine the reason for limit operation
and thus avoid repeated thermostat replacement. Lower the
temperature adjustment setting on new control.

VENTING SYSTEM

HAVE VENTING SYSTEM CHECKED EVERY SIX MONTHS FOR
OBSTRUCTIONS AND/OR DETERIORATION IN VENT PIPING.

POWER VENTER MAINTENANCE

The “POWER” venter must be inspected yearly.

1.

MOTOR - Motor must rotate freely.

For safety and satisfactory operation it is recommended that the
heater be checked once a year by a competent service person.

T & P VALVE

At least once a year, the temperature and pressure relief valve
must be checked to ensure that it is in operating condition. Lift
the lever at the top of the valve several times until the valve seats
properly and operates freely.

  

DANGER

THE WATER PASSING OUT OF THE VALVE DURING THIS
CHECKING OPERATION MAY BE EXTREMELY HOT.  AVOID

CONTACT AND DISCHARGE SAFELY TO PREVENT WATER
DAMAGE.

DRAINING

If the heater is to be shut off and exposed to freezing
temperatures, it must be drained.  Water, if left in the tank and
allowed to freeze, will damage the heater.

Turn off the gas and cold water inlet valve to the heater.

Open a nearby hot water faucet and the heater drain valve.

BE CAREFUL TO GRASP THE DRAIN VALVE HANDLE
SO THAT THE HAND IS NOT EXPOSED TO HOT WATER.
IF DESIRED, A HOSE MAY BE CONNECTED TO THE
DRAIN VALVE TO CARRY THE WATER AWAY.

  

DANGER:  The water CAN BE HOT

.

The drain valve must be left open during the shutdown
period.

To restart heater, refer to the FILLING instructions under
OPERATION.

Periodically open the drain valve and allow the water to run until
it flows clean.  This will help prevent sediment build-up in the
tank.

It is normal for lime and scale deposits to form within the tank.
Such deposits will not be removed by periodic draining.  It is
necessary to chemically delime the affected parts in water areas
where such deposits are encountered.

CONDENSATION

Water vapor can condense on the cooler surfaces of the tank
forming droplets, these drip into the fire or run out on the floor.
This is common at the time of startup after installation, during
periods of time when incoming water is very cold, or the heater
may be undersized for the requirements.

Droplets from the bottom of the flue may be due to corrosive
combustion products or improper vent. Check with your dealer
for more information.

CATHODIC PROTECTION - ANODE

The anode rod is used to protect the tank from corrosion. Most
hot water tanks are equipped with an anode rod. The sub-
merged rod sacrifices itself to protect the tank. Instead of
corroding the tank, water ions attack and eat away the anode
rod. This does not affect the water’s taste or color.  The rod must
be maintained to keep the tank in operating condition.

Anode deterioration depends on water conductivity, not
necessarily water condition. A corroded or pitted anode rod
indicates high water conductivity and should be checked and/or
replaced more often than an anode rod that appears to be intact.
Replacement of a depleted anode rod can extend the life of your
water heater. Inspection should be conducted by a qualified
technician, and at a minimum should be checked annually after
the warranty period.

Содержание GPDH

Страница 1: ...er heater from A O Smith Water Products Company We appreciate your confidence in our products You should thoroughly read this manual before installation and or operation of this water heater Please pay particular attention to the important safety and operating instructions as well as the WARNINGS and CAUTIONS ADIVISION OFA O SMITH CORPORATION www aosmithwaterheaters com GET TO KNOWYOUR WATER HEATE...

Страница 2: ...CONTROL HARNESS AND INSIDE JACKET GAS MODEL GPDH GPDT GPDX WITH HOT SURFACE IGNITION CERTAIN MODELS ARE EQUIPPED WITH SIDE PLUMBING CONNECTIONS FOR SPACE HEATING HOT AND COLD FITTING ASSEMBLIES PART NO 900126 2 TEMPERATURE INDICATORS TEMPERATURE ADJUSTMENT BUTTONS TYPICALNATURALGAS PILOT MAIN BURNER HOT SURFACE IGNITION ASSEMBLY Replacement parts and recommended delimer may be ordered through auth...

Страница 3: ...aking an insulation blanket unnecessary WARNING Should you choose to apply an insulation blanket to this heater you should follow these instructions see Figure 1 for identification of components mentioned below Failure to follow these instructions can restrict the air flow required for proper combustion potentially resulting in fire asphyxiation serious personal injury or death Do not cover the ou...

Страница 4: ...THE HEATER OR TO LOWER FLOORS OF THE STRUCTURE When such locations cannot be avoided a suitable drain pan should be installed under the heater see Figure 1 The pan should have a minimum length and width of at least 2 inches 51mm greater than the diameter of the heater and should be piped to an adequate drain Drain pans suitable for these heaters are available from your dealer or A O Smith Water Pr...

Страница 5: ...UT OFF VALVE FROM THE GAS SUPPLY PIPING SYSTEM DURING ANY SUPPLY PRESSURE TESTING EXCEEDING 1 2 PSI 3 5 kPa GAS SUPPLY LINE MUST BE CAPPED WHEN DISCONNECTEDFROMTHEHEATER FORTESTPRESSURESAT 1 2 PSI 3 5 kPa OR LESS THE APPLIANCE NEED NOT BE DISCONNECTED BUT MUST BE ISOLATED FROM THE SUPPLY PRESSURETESTBYCLOSINGTHE MAIN MANUALGAS VALVE BEFORE PLACING THE HEATER IN OPERATION CHECK FOR GAS LEAKAGE USE ...

Страница 6: ...ve any door window or gravity air inlet into the building see Figure 4 The Power Direct Vent outlet terminal of over 50 000 BtuH input models shall terminate at least 12 30 5 cm below 12 30 5 cm horizontally from or 12 30 5 cm above any door window or gravity air inlet into the building see Figure 4 18 45 7 cm minimum from other natural draft gravity direct vent power vent or power direct vent app...

Страница 7: ...pported at 3 1 2 foot 8 9 cm intervals and vertical runs supported at 5 foot 1 5 cm intervals VENTING THROUGH AN OUTSIDE WALL A ALL 75 GAL 283 9L 65 000 70 000 BTU HR MODELS 50 GAL 189 3L 60 000 65 000BTU HRMODELS SEE FIGURE 10 In the carton is supplied 1 Two 3 inlet and outlet PVC Schedule 40 45 vent caps 2 A 3 ABS Schedule 40 90 street elbow used to connect the outlet vent pipe to the water heat...

Страница 8: ... vent piping cannot under any circumstances be run downhill FIGURE 12 The vent piping can be installed as follows 1 Horizontal runs require a minimum1 8 3 2mm rise per 5 1 52 m FIGURE 13 FIGURE 14 FIGURE 15 2 The total vertical and horizontal vent runs cannot exceed the maximum length with the number of 90 elbows as specified in the table below If more elbows are required the venting distance must...

Страница 9: ...mer cleaner 4 Apply a thin coat of cement to fitting avoiding puddling inside 5 Apply a liberal coat of cement to pipe leaving no voids 6 QUICKLY assemble parts while cement is fluid If you wait too long re coat pipes 7 Push pipe completely into socket of fitting turning as it goes until it bottoms 8 Hold pipe and fitting together for 30 seconds Then carefully clean off excess with a cloth Allow c...

Страница 10: ...al 189 3 L Hi BTU input all 75 Gal 283 9 L Models only is supplied on certain models only More may be required and must be supplied locally 1 The water heater requires its own separate venting system 2 Only 3 ABS Schedule 40 piping and fittings are acceptable materials on the first 5 1 52 m of the outlet vent system for some 50 Gal 189 3 L and 75 Gal 283 9 L models 3 3 PVC ABS or CPVC Schedule 40 ...

Страница 11: ...secure with screws FIGURE 24 SCHEMATIC DIAGRAMS FIGURE 25 WARNING DISCONNECT FROM ELECTRICAL SUPPLY BEFORE SERVICING UNIT REPLACE ALL DOORS AND PANELS BEFORE OPERATING HEATER IF ANY OF THE ORIGINAL WIRES SUPPLIED WITH THE APPLIANCE MUST BE REPLACED IT MUST BE REPLACED WITH APPLIANCE WIRE MATERIAL WITH MINIMUM TEMPERATURE RATING OF 105 C AND A MINIMUM SIZE OF NO 18 AWG FIGURE 26 T P VALVE AND PIPE ...

Страница 12: ...cond Then press the COOLER button until the WARM indicator light appears BEFORE OPERATING ENTIRE SYSTEM MUST BE FILLED WITH WATERANDAIR PURGED FROMALL LINES 1 STOP Read the safety information above on this label 2 Set the ON OFF switch on the control box to the ON position 3 Set the thermostat to the lowest setting by first pressing the COOLER and HOTTER buttons together and holding for 1 second T...

Страница 13: ...G OF GAS VALVE WILL REDUCE THE RISK OF SCALDS Some states require settings at specific lower temperatures Figure 28 shows the approximate water temperatures produced at various thermostat dial settings Short repeated heating cycles caused by small hot water uses can cause temperatures at the point of use to exceed the thermostat setting by up to 30 F 1 C If you experience this type of use you shou...

Страница 14: ...onds Flame Recognition Period 1 second Ignition Trial 4 seconds Interpurge 5 seconds Post purge 5 seconds Retries 2 Reset from Lockout 1 hr Flame Sensing Nominal HSI Off Run Mode 4 0µ DC HIGH ALTITUDE INSTALLATION WARNING INSTALLATIONS ABOVE 2000 610 m FEET REQUIRE REPLACEMENT OF THE BURNER ORIFICE IN ACCORDANCE WITH THE NATIONAL FUEL GAS CODE ANSIZ223 1 NFPA54 FAILURE TOREPLACETHEORIFICEWILLRESUL...

Страница 15: ...ING OUT OF THE VALVE DURING THIS CHECKING OPERATION MAY BE EXTREMELY HOT AVOID CONTACT AND DISCHARGE SAFELY TO PREVENT WATER DAMAGE DRAINING If the heater is to be shut off and exposed to freezing temperatures it must be drained Water if left in the tank and allowed to freeze will damage the heater Turn off the gas and cold water inlet valve to the heater Open a nearby hot water faucet and the hea...

Страница 16: ...ontact your dealer or theA O Smith authorized service agent in your area and explain to them why you are not satisfied This will usually correct the problem If after working with your dealer or service agent the problem has not been resolved to your satisfaction please let us know by either writing to us at A O Smith Water Products Company Service Department 106 Adkisson St Ashland City TN 37015 o...

Страница 17: ...s correct and secure 2 Replace hot surface igniter System in lockout 1 Gas supply is off or too low to operate 2 Hot surface igniter not positioned correctly 3 Low voltage to the water heater 4 Electric polarity to unit is incorrect test and correct Problem in the gas valve driver circuit 1 Turn power to the water heater off for 10 seconds and the back on 2 Replace gas control valve Problem with t...

Страница 18: ...ice A Dirt in burner ports Turn off heater and gas clean burner head B Combustion air path restricted Check intake venting arrangements for YELLOWFLAME obstructions C Not enough dilution air for proper Check Intake venting arrangement for combustion obstructions A Water on the floor under heater See CONDENSATION section CONDENSATION B Water dripping from pan Provide drip TEE to catch condensation ...

Страница 19: ...IBILITY UNDER THIS LIMITED WARRANTY THE WARRANTOR WILLPROVIDE ONLY A REPLACEMENT WATER HEATER OR PART THEREOF THE OWNER IS RESPONSIBLE FOR ALL OTHER COSTS Such costs may include but are not limited to LIMITED RESIDENTIAL GAS WARRANTY a Labor charges for service removal or reinstallation of the water heater or part thereof b Shipping and delivery charges for forwarding the new water heater or repla...

Страница 20: ...20 125 SOUTHEAST PARKWAY FRANKLIN TN 37068 Phone 1 800 433 2545 Fax 1 800 433 2515 www aosmithwaterheaters com email parts hotwater com ...

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