A.O. Smith HW 610 ユーザーズマニュアル

39

After placing boiler into operation, the ignition system safety shutoff 

device must be tested by the following test method.

1.  Reset  High  Limit  Temperature  Control  to  lowest  setting.  

(See figure 2 on page 8).

2.  Reset System Controller to maximum setting, causing a call for heat 

and allowing unit to run until High Limit Temperature Control trips.

3.  Resetting the High Limit Temperature Control to a higher setting, 

unit should run.

4.  Reset System Controller and High Limit Temperature Control to 

desired temperature. If unit fails to run, see Trouble-Shooting in 

this manual.

Before operating the boiler, the entire system must be filled with 

water, purged of air and checked for leaks. Do not use Stop Leak 

or  other  boiler  compounds. The  gas  piping  should  also  be  leak 

tested.

Any safety devices including low water cutoffs used in conjunction 

with this boiler should receive periodic (every six months) inspection 

to assure proper operation. A low water cutoff device of the float 

type should be flushed every six months. All relief valves should be 

inspected and manually operated at least twice a year.

IT IS RECOMMENDED THAT A QUALIFIED PERSON PERFORM 

THE  INITIAL  FIRING  OF  THE  BOILER. AT  THIS  TIME  THE 

USER  SHOULD  NOT  HESITATE  TO ASK  THE  INDIVIDUAL 

ANY QUESTIONS WHICH HE MAY HAVE IN REGARD TO THE 

OPERATION AND MAINTENANCE OF THE UNIT.

1.  Fast  fill  system  through  bypass  until  pressure  approaches 

desired  system  pressure.  Close  bypass  valve  and  permit 

pressure to be established by the pressure reducing valve.

2.  Vent all high points in system to purge system of air.

If pressure bleeding of system is desired, install valves as shown in 

Figure 7 on page 14.

Where cast iron radiation and motorized valves are used, conventional 

system pressure and installation practices should be followed.

Provisions should be made to permit manual venting of radiators 

or convectors.

If the unit is exposed to the following, do not operate boiler until all 

corrective steps have been made by a qualified serviceman:

1.  Flooding to level of burner or controls or higher.

2.  Exposure to fire.

3.  If damaged.

4.  Firing without water.

5.  Sooting.

SHOULD  OVERHEATING  OCCUR  OR  THE  GAS  SUPPLY 

FAIL  TO  SHUT  OFF,  DO  NOT  TURN  OFF  OR  DISCONNECT  

THE  ELECTRICAL  SUPPLY  TO  THE  PUMP.  INSTEAD,  

SHUTOFF THE GAS SUPPLY AT A LOCATION EXTERNAL TO 

THE APPLIANCE.

To maintain safe operation of the boiler, check the pilot and the main 

burner once every six months for proper flame characteristics.

1.  MAIN BURNER

 

The  main  burner,  Figure  34,  should  display  the  following 

characteristics:

 

•   Provide complete combustion of gas.

 

•  Cause rapid ignition and carryover of flame across entire burner.

  

•  Give reasonably quiet operation during ignition, burning and 

extinction.

  

•  Cause no excessive lifting of flame from burner ports.

If the proceeding burner characteristics are not evident, check for 

accumulation of lint or other foreign material that restricts or blocks 

the air openings to the burner or boiler.

Also check for good flow of combustion and ventilating air to the unit.  

Maintain a clear area around the boiler at all times.

The boiler should be periodically inspected by a qualified servicer 

for continuous safe operation.

Qualified servicers should follow this procedure when the boiler’s 

burners need cleaning.

 

1.  Turn off the electrical power and close the main manual gas 

shutoff valve. See L&O instructions on pages 43 and 44.

 

 

•  Allow boiler parts to cool before disassembly.

 

2.  Remove main burner manifold assembly from boiler.

 

 

•  Refer  to  parts  list  supplied  with  this  manual  for 

disassembly aid.

 

3.  Remove any loose foreign material such as dust or lint with 

a vacuum.  Check all ports, orifices, and air openings for 

blockage.  Dislodge any foreign material causing blockage.  

Remove any soot or carbon deposits with a rag making sure 

to remove any lint left on burner by vacuuming again.