American ABCG3, Installation, Operation And Maintenance Instructions

29

cleanout. UN•LIME

®

 and the booklet may be obtained through 

your American dealer or distributor.

FIGURE 18

CAUTION

Observe handling instructions on label of product being used.

TANK CLEANOUT PROCEDURE

The following practices will ensure longer life and enable the unit 

to operate at its designed efficiency:

1.  Once a month the heater should be flushed.  Open the drain 

valve and allow two gallons of water to drain from the heater.  

Inlet water valve should remain open to maintain pressure in 

tank.

2.  A  cleanout  opening  is  provided  for  periodic  cleaning  of  the 

tank.  Gas must be shut off and heater drained before opening 

cleanout.

To clean heater through cleanout opening, proceed as follows:

1.  Drain heater.

2.  Remove outer cover plate from lower side of heater jacket.

3.  Remove six (6) hex head screws securing tank cleanout plate 

and remove plate.

4.  Remove lime, scale, or sediment using care not to damage the 

glass lining.

5.  Inspect cleanout plate gasket, if new gasket is required, replace 

with American Water Heater Company part no. 99038.

6.  Install  cleanout  plate.    Be  sure  to  draw  plate  up  tight  by 

tightening screws securely.

7.  Replace outer jacket cover plate. 

TROUBLESHOOTING

IGNITION MODULE SYSTEM

Before calling your service agent, the following checklist should 

be examined to eliminate obvious problems from those requiring 

replacement or servicing.

— Check that “main manual gas shut-off valve” is fully open and 

that gas service has not been interrupted.

— Check  that  after  following  the  appliance  OPERATING 

INSTRUCTIONS, the “Top Knob” of the appliance gas valve 

is in “ON” position.

— Check electrical supply to the appliance for possible blown (or 

tripped) fusing or power interruption.

— Is the water temperature in tank below the thermostat 

dial  setting  on  the  appliance  thermostat  (calling  for 

heat)?

— It is possible that the high limit (E.C.O.) has functioned 

to  shut  off  the  appliance.    See  FEATURES  —  Water 

Temperature Control for reset procedure.  Contact your 

serviceman  if  limit  continues  to  function  to  shut  off 

appliance. 

SERVICE

The  installer  may  be  able  to  observe  and  correct  certain 

problems which may arise when the unit is put into operation.  

HOWEVER, it is recommended that only qualified servicemen, 

using  appropriate  test  equipment,  be  allowed  to  service  the 

heater.

As  preliminary  step,  check  wiring  against  diagram,  check  for 

grounded, broken or loose wires.  Check all wire ends to be sure 

that they are making good contact.

ELECTRICAL SERVICING

CAUTION

LABEL ALL  WIRES  PRIOR  TO  DISCONNECTION  WHEN 

SERVICING CONTROLS.  WIRING ERRORS CAN CAUSE 

IMPROPER AND DANGEROUS OPERATION.

VERIFY PROPER OPERATION AFTER SERVICING.

REPLACEMENT PARTS

Replacement  parts  may  be  ordered  through  American 

Water  Heater  Company.  When  ordering  parts  be  sure 

to state the quantity, part number and description of the 

item(s)  including  the  complete  model  and  serial  number 

as it appears on the product.  Refer to the part’s list for 

more information.