Lochinvar 751 - 2001 사용자 설명서

        

Installation & Operation Manual

Follow the service and maintenance procedures given throughout this manual and in component literature 
shipped with the boiler.  Failure to perform the service and maintenance could result in damage to the boiler 
or system.  Failure to follow the directions in this manual and component literature could result in severe 
personal injury, death, or substantial property damage.

The boiler should be inspected annually only by a qualified service technician.  In addition, the maintenance 
and care of the boiler designated in Table 11A and explained on the following pages must be performed to 
assure maximum boiler efficiency and reliability.  Failure to service and maintain the boiler and system could 
result in equipment failure.

Electrical shock hazard – Turn off power to the boiler before any service operation on the boiler except as 
noted otherwise in this instruction manual.  Failure to turn off electrical power could result in electrical shock, 
causing severe personal injury or death.

1.  Inspect any problems reported by the owner and correct 

before proceeding.

1.  Verify that boiler area is free of any combustible materials, 

gasoline and other flammable vapors and liquids.

2.  Verify that air intake area is free of any of the contaminants 

listed in Section 1 of this manual.  If any of these are 
present in the boiler intake air vicinity, they must be 
removed.  If they cannot be removed, reinstall the air and 
vent lines per this manual.

1.  Remove the front access covers and inspect the interior 

of the boiler.

2.  Vacuum any sediment from inside the boiler and 

components.  Remove any obstructions.

1.  Inspect the condensate drain line, vent line, condensate 

PVC fittings, and condensate trap.

Flush condensate trap with water
1.  Remove the four (4) screws securing the top cover to the 

condensate trap and remove the cover (FIG. 11-1).

2.  Locate the plastic ball inside the float tube.  Verify there 
 

is nothing under the ball causing it to not seat properly.

3.  Fill with fresh water until the water begins to pour out of 
 the 

drain.

4.  Replace the top cover and the screws removed in Step 1.

Eliminate all system or boiler leaks. 

 

Continual fresh makeup water will 
reduce boiler life.  Minerals can build up, 
reducing heat transfer, overheating heat 
exchanger, and causing heat exchanger 
failure.  Leaking water may also cause 
severe property damage.

1.  Inspect all water and gas piping and verify to be leak free.

2.  Look for signs of leaking lines and correct any problems 

found.

3.  Check gas line using the procedure found in Section 6 

-  Gas Connections.

 WARNING

 WARNING

 WARNING

 WARNING

FROM CONDENSATE
VENT ON BOILER

FROM CONDENSATE
DRAIN ON BOILER

TO FLOOR DRAIN
OR NEUTRALIZER KIT
1” PVC / CPVC CONNECTION

1.  Visually inspect the entire flue gas venting system and air 

piping for blockage, deterioration or leakage.  Repair any 
joints that show signs of leakage. Verify that air inlet pipe 
is connected and properly sealed.

2.  Verify that boiler vent discharge and air intake are clean 

and free of obstructions.

Failure to inspect for the above conditions 
and have them repaired can result in 
severe personal injury or death.

 WARNING

1.  Verify all system components are correctly installed and 

operational.

2.  Check the cold fill pressure for the system.  Verify it is 

correct (must be a minimum of 12 psi (82.7 kPa)).

3.  Watch the system pressure as the boiler heats up (during 

testing) to ensure pressure does not rise too high. 

 

Excessive pressure rise indicates expansion tank sizing 
or performance problem.

4.  Inspect automatic air vents and air separators.  Remove 

air vent caps and briefly press push valve to flush vent.  
Replace caps.  Make sure vents do not leak.  Replace any 
leaking vents.