American Water Heater Heavy Duty Commercial Gas BCG3 User Manual

31
FIGURE 25.
If  the  Temperature-Pressure  Relief  Valve  on  water  heater  weeps 
or discharges periodically, this may be due to thermal expansion.
NOTE: Excessive water pressure is the most common cause 
of  Temperature-Pressure  Relief  Valve  leakage.  Excessive 
water  system  pressure  is  most  often  caused  by  "thermal 
expansion" in a "closed system." See Closed Water Systems 
and  Thermal  Expansion  on  page  12.  The  Temperature-
Pressure  Relief  Valve  is  not...

32
5. Ensure  the  drain  hose  is  secured  before  and  during  the 
entire flushing procedure. Flushing is performed with system 
water pressure applied to the water heater.
6.  Open the water heater drain valve to flush the storage tank.
7.  Flush the water heater storage tank to remove sediment and 
allow the water to flow until it runs clean.
8.  Close the water heater drain valve when flushing is completed.
9.  Remove the drain hose.
10.  Fill the water heater - see Filling The Water Heater in...

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Do not smoke or have open flame or sparks in vicinity of heater. 
Do not mix UN•LIME with other chemicals. Do not allow contact 
with magnesium, aluminum or galvanized metals.
Chemical Hazard
• Product contains phosphoric acid.
• Keep out of reach of children.
• Use rubber or neoprene gloves.
Contains  phosphoric  acid.  In  case  of  external  contact,  
flush  with  cool  water.  If  irritation  persists,  get  medical 
attention. If swallowed, give 1 or 2 glasses of water or milk and   
call...

34
FIGURE 27.
PILOT BURNER
At  least  once  a  year,  check  the  pilot  burner,  Figure  29,  and  the 
main  burner,  Figure  30,  for  proper  operation.  See  Figure  28  for 
the location of the Pilot Burner and the Main Burners. For access 
to pilot, unfasten two screws to burner cover and remove.  Locate 
the burner with pilot and remove screw holding burner to manifold. 
Unfasten pilot tubing from valve and slide out burner and pilot.
Servicing  of  the  pilot  burner  includes  keeping  pilot...

35
GAS CONTROL VALVE
Figure 31 shows the two types of combination gas control valves
used on these heaters.
If  gas  control  valve  becomes  defective,  repairs  should  not  be 
attempted. A new valve should be installed in place of defective one.
LP VALVE
NATURAL VALVEFIGURE 31.
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  a  qualified  service  technician  or 
qualified...

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receptacle.  Do  not  push  meter  leads  into  harness  receptacle. 
This  opens  the  pins  and  will  create  connection  problems.  See 
the  following  EFFIKAL  RVGP-KSF-SERIES  FLUE  DAMPER 
TROUBLE SHOOTING GUIDE.
Green LED  Flash Code a   Indicates   Next Syste m A ction   Reco mmended  Service  Act ion   
OFF     No “Call for Heat”     Not applicab le     None   
Flash  Fast     Power  up   -   in ter nal  check     Not applicab le     None   Heartbeat    Norma l startu p  –   ig niti on...

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PIN END VIEW
24 V.A.C. NORMAL SEQUENCE OF OPERATION       
B. DAMPER HAS OPENED, 
 NO COMBUSTION
  VOLTAGE ACROSS:
  4 & 1; 4 & 2; 4 & 3:  1. Check for power at ignition module terminals.  If 24VAC power is present damper  
        is working properly.     
    2. Defective component in water heater after the flue damper.   
    3. If 24 VAC is not present at the ignition module, look for  loose or broken 
          connections between damper and ignition module.
    4.  If the connections from damper...

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COMPLAINTCAUSE REMEDY
USER QUALIFIED SERVICE AGENCY
Water not hot enough. Thermostat set too low.
Set thermostat dial to a higher 
temperature.
Upper and/or lower temperature  probe out of calibration. Call qualified service agency. Check continuity and resistance 
(Ohms) of upper and lower 
thermostat probes. Replace probes  if out of specification.
Insufficient hot water Thermostat set too low.
Set thermostat dial to a higher 
temperature.
Upper and/or lower temperature  probe out of calibration....

39
c.  A  sulfate  reducing  bacteria  which  has  accumulated 
within  the  water  heater  (this  harmless  bacteria  is 
nontoxic to humans).
d.   An excess of active hydrogen in the tank. This is caused 
by the corrosion protective action of the anode rod.
Smelly  water  may  be  eliminated  or  reduced  in  some  water 
heater  models  by  replacing  the  anode  rod(s)  with  one  of  less 
active material, and then chlorinating water heater tank and all 
water lines.
Contact  the  local  water...

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WATER PIPING DIAGRAMS
NOTES:
1 .  Pref erred  piping  diagram.
2 .  The t emperat ure and  pressure  relief valve  setting  shall not exceed  pressure  rating  of  any  component  in the  syst em.
3 .  Servic e v alv es  are s hown f or serv icing  unit. However , local  codes  shall govern t heir usage.
4 .  The  Tank  Temperat ure Cont rol should  be wired t o and  control the pump  between t he wat er heat er(s)  and the storage t ank(s).
5 .  The  wat er heat er’s  operat ing thermost at  should...