American Standard PLC 100-76 Operation, Installation And Service Manual Download Page 27

FOR YOUR SAFETY READ BEFORE OPERATING

WARNING

A.  This appliance is equipped with an ignition device which automatically lights the pilot. Do not try to light the pilot by hand.

B.   BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and 
will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
. Do not try to light any appliance.
. Do not touch any electric switch; do not use any phone in your building.
. Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions.
. If you cannot reach your gas supplier, call the fire department.

C.   Use only your hand to turn the gas valve knob.
Never use tools. If the knob will not turn by hand, don´t try to repair it, call a qualified service technician. Force or attempted repair may result in 
a fire or explosion.

D.   Do not use this appliance if any part has been under water.
Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has 
been under water.

If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury, or 
loss of life.

OPERATING INSTRUCTIONS

GAS VALVE CONTROL SHOWN IN ''OFF" POSITION

22

21

1. STOP! Read the safety warnings shown on this page.
2. Set the thermostat to the lowest setting by dialing 
    counter-clockwise. 
3. Turn the gas control knob clockwise            to the “OFF” 

position.

4. Wait five (5) minutes for any gas in the system to clear out. If 

after this time you smell gas, STOP and follow “B” in the safety 
information on this page. If no gas odor is detected, proceed to 
the next step.

5. Turn the gas control knob counter-clockwise             to the 

“PILOT” position.

6. Press the Ignition button located on the thermostat.
7. Turn the gas control knob counter-clockwise            to the 

“ON” position.

8. Set the temperature dial to the desired setting. 

COMBINATION SPACE HEATING /POTABLE WATER HEATING SYSTEM

When using this heater as a source of heat for a combination space heating/potable water heating system, be sure to follow manual(s) 
shipped with air handler system. Refer to figure 18 page 32. Note the following warnings:
Toxic chemicals, such as those used for boiler treatment, shall NEVER be introduced into this system. This unit may NEVER be 
connected to any existing heating system or component(s) previously used with a non-potable water heating appliance.
DO NOT use with piping that has been treated with chromates, boiler seal or other chemicals.
DO NOT add boiler treatment or any chemicals to any heat piping, since the piping contains potable water.
DO NOT use with ferrous piping. The system should be installed only with new piping that is suitable for potable water, such as 
copper or polybutylene. DO NOT USE WITH PVC PIPING.
DO NOT use with any pumps, valves, or fittings that are not completely compatible with potable water piping.
DO NOT use valves that may cause excessive restriction to water flow. USE FULL FLOW BALL OR GATE VALVES ONLY.
DO NOT tamper with the thermostat, gas valve, igniter control or temperature and pressure relief valve. Tampering with any of these 
components is DANGEROUS and can result in property damage or severe injury. Tampering voids all warranties. Only qualified 
personnel should service these components.
DO NOT use 50/50 solder in potable water lines.
IF THE SPACE HEATING system requires water temperatures in excess of 140°F, a mixing valve or other means should be installed in 
the domestic (potable) hot water supply to limit the RISK OF SCALD DAMAGE.
SOME JURISDICTIONS may require a backflow preventer in the incoming cold water line to the water heater. ln such cases, the 
temperature and pressure relief valve on the water heater may weep or relieve due to expansion of the heated water. A 
diaphragm-type expansion tank will normally eliminate this weeping condition. Please read and follow the manufacturer's instructions 
for installation of such tanks.

VENTING SYSTEM INSPECTION

Check the draft hood relief opening (Figure 5) using a match flame after 15 minutes of operation. Pass the match flame around the relief 
opening of the draft hood. A steady flame drawn into the opening indicates proper draft. If the flame flutters or is blown out this would 
indicate spillage and corrective action must be made to the vent. (Figure 5)
At least every 3 months a visual inspection should be made of the venting system. You should look for:
Obstructions which could cause improper venting.
Damage or deterioration which could cause improper venting or leakage of combustion products.

CONDENSATION

Whenever the heater is filled with cold water there will usually be a certain amount of condensation formed while the burner is ON. 
Moisture from the products of combustion condenses on the cooler tank surfaces to produce a "sizzling" or "frying" noise. During the 
winter months this condition will be more pronounced. Condensation is normal and should not be confused with a leaking tank. The 
water will be noted at different times of the year and in varying quantities.

BEFORE PLACING THIS WATER HEATER IN OPERATION SEE "CONDENSATION" 
ON PREVIOUS PARAGRAPH.

Summary of Contents for PLC 100-76

Page 1: ...e Do not touch any electrical switch do not use any phone in your building Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you cannot reach your ga...

Page 2: ...OUR RECEIPT TO SHOW TO THE SERVICE PERSON IF SERVICE IS REQUIRED OPERATING INSTALLATION AND SERVICE MANUAL STORAGE TYPE GAS WATER HEATER WITH FLUE DAMPER WARNING If the information in these instructio...

Page 3: ...ts Water temperature over 125 F can cause severe burns instantly or death from scalds Children disabled and elderly are at highest risk of being scalded See instruction manual before setting temperatu...

Page 4: ...d replace anode Install in location with drainage Fill tank with water before operation Be alert for thermal expansion Refer to instrucion manual for installation and service Improper installation and...

Page 5: ...EATER WITH WATER INSTALLATION CHECK LIST NATURAL GAS MODELS L P PROPANE BOTTLED GAS MODELS OUT OF FUEL EXPOSURE TO WATER INSTRUCTIONS FOR CLEANING TANK TO RETURN WATER HEATER TO OPERATION VACATION COM...

Page 6: ...E THIS MANUAL HAS BEEN PREPARED TO ACQUAINT YOU WITH THE INSTALLATION OPERATION AND MAINTENANCE OF YOUR GAS WATER HEATER AND TO PROVIDE IMPORTANT SAFETY INFORMATION WE URGE YOU TO READ ALL INSTRUCTION...

Page 7: ...ion adjustment alteration service or maintenance can cause injury or property damage Refer to this manual For assistance or additional information consult a qualified installer service agency or the g...

Page 8: ...ude Contact the company listed on the rating label when ordering high altitude constructed water heaters For any questions not covered in this booklet contact your dealer or write to us at the address...

Page 9: ...rents NOTE HEATER SHALL BE LOCATED OR PROTECTED SO IT IS NOT SUBJECT TO PHYSICAL DAMAGE BY MOVING VEHICLES OR AREA FLOODING Typical Installation in Residential Garages Illustration copyright by the Am...

Page 10: ...the water heater and the combustion air inlet must be in the same atmospheric pressure zone Large exhaust fans in kitchens or other locations can lower the air pressure inside an enclosure and interfe...

Page 11: ...r to check the installation for venting and for spillage all around the draft hood relief opening after five minutes of operation the method to check for flue products spillage should utilize a flame...

Page 12: ...e a good grade of pipe joint compound Be familiar with the location of the shut off valve in the cold water line feeding the water heater See Figure 5 If a valve is not present one shall be installed...

Page 13: ...ft 91 cm above if within 10ft 3m Horizontally E Clearance to unventilated 12 in L Above paved sidewalk or paved driveway located on public property 7 ft 2 13 m for mechanical draft systems category I...

Page 14: ...H SUITABLE DRAIN OPEN DRAIN HAND HOLE CLEAN OUT T P RELIEFVALVE COLDWATER INLET SHUT OFFVALVE EXPANSIONTANK STORAGETANK CHECK VALVE DRAINVALVE Use an ExpansionTank in a closed water system ColdWater S...

Page 15: ...ff valve Shut off valve Shut off valve Shut off valve Bleed valve System return Union Union Expansion tank Water supply Back flow preventers PUMP SINGLE COMMERCIAL GAS MODEL TOP CONNECTIONS WITH RETUR...

Page 16: ...er commercial or household products When urned vapors from these products form highly corrosive acid compounds These products should not be stored or used near the water heater or air inlet Combustion...

Page 17: ...ommunicating with the outdoors through vertical ducts each opening shall have a minimum free area of 1 square inch per 4 000 BTU per hour of total input rating of all equipment in the enclosure Figure...

Page 18: ...equipment in the enclosure Illustration for Figures 6 9 copyright by the American Gas Association Used by permission of the copyright holder MECHANICAL EXHAUSTING AND FIREPLACES the operation of air...

Page 19: ...ground level will serve as pockets for accumulation of leaking gas Before lighting sniff at floor level IF YOU SMELL GAS follow applicable instructions on Front Cover or Page 21 DO NOT OPERATE APPLIAN...

Page 20: ...e cigar or pipe Do not smoke If hydrogen is present there will probably be an unusual sound such as air escaping through the faucet as the water begins to flow Remember no smoking or open flame near t...

Page 21: ...the water flow may cause property damage The discharge line 1 Must not be smaller than the pipe size of the relief valve 2 Must not be plugged or blocked 3 Must be of material capable of withstanding...

Page 22: ...ING THE HEATER WITH WATER 1 Close the heater drain valve by turning the handle to the right clockwise The drain valve is on the lower front of heater 2 Open the cold water supply valve to the heater 3...

Page 23: ...ure 5 Approved pipe joint compound used Soap and water solution used to check all connections and fittings for possible gas leaks The installer to visually determine that the main burner flames are bu...

Page 24: ...t FLOOR LEVEL IF YOU SMELL GAS FOLLOW THESE RULES 1 Open windows 2 Get all people out of the building 3 DO NOT light matches Extinguish any open flame 4 DO NOT touch electrical switches on or off 5 SH...

Page 25: ...dge 7 After tank has cooled remove loose scale and lime deposits from inside tank being careful not to break glass lining TO RETURN WATER HEATER TO OPERATION I Replace hand hole clean out gasket 2 Re...

Page 26: ...140 F a mixing valve or other means should be installed in the domestic potable hot water supply to limit the RISK OF SCALD DAMAGE SOME JURISDICTIONS may require a backflow preventer in the incoming c...

Page 27: ...D Do not use this appliance if any part has been under water Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control...

Page 28: ...IMIT The thermostat on this water heater is equipped with a high temperature limit switch ECO The ECO will shut off the gas supply to the burner and pilot in the event the water temperature exceeds 19...

Page 29: ...urner and pilot flames Observation of the gas flame should show the burner flame to be a soft blue with the suggestion of slight yellow tips It is to be noted that the flame of a light color may not b...

Page 30: ...d if being shut down during freezing temperatures Also periodic draining and cleaning of sediment from the tank may be necessary See Page 22 I Turn gas valve knob clockwise to the OFF position 2 Close...

Page 31: ...eplace with correct orifice Clear the area near the heater Check with utility Clean check for source of trouble correct Clean check for source of trouble correct Provide ventilation by use of louvers...

Page 32: ...ice too small Thermostat set too low Sediment or lime in tank Heater too small for job Wasted hot water Clear the area near the heater Check with utility Replace with correct orifice Turn temperature...

Page 33: ...number from the following list part description voltage and wattage when applicable It is imperative that replacement of main burner orifices pilot burner and gas valve be ordered for the gas type Nat...

Page 34: ...29 REPLACEMENT PARTS ILLUSTRATION STANDARD MODEL SHOWN Figure 17 1 2 3 4 5 6 7 8 9 10 11 12 13...

Page 35: ...NG POTABLE WATER HEATING SYSTEM WATER POTABLE HEATING AND SPACE HEATING NON SCALD TEMPERING VALVE SUGGESTED PIPING ARRANGEMENT FOR TOP CONNECTIONS TEMPERED POTABLE WATER COLD WATER INLET RETURN FROM H...

Page 36: ...REV APRIL 2021 ITEM 420011141900 561 New York Drive Pomona California 91768 Toll Free 800 900 9063 Fax 909 392 7302...

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