Lochinvar SNR200-100 用户手册

- Supply gas problem.  Natural gas pressures 
 should be between 4 inches w.c. and 
 14 inches w.c. LP gas pressures should 
  be between 8 inches w.c. and 14 inches w.c.

 • Refer to Section 6 - Gas Connections for detailed 
  information concerning the gas supply.

- Gas/air mixture problem.

 • Refer to the Gas Valve Adjustment Procedure on 

 

 

 

 

  page 73 of this manual for the proper gas valve setting.  
  Verify that the vent/air intake lengths do not exceed the 
  maximum listed in the General Venting section.

- Dirty/damaged burner.  

 • Refer to page 60 in this manual for the burner removal 
  and inspection procedure. Clean or replace the burner 
 as 

necessary.

- Low water flow through the heat exchanger.  

 • Refer to Section 5 - System Piping for minimum flow 
 rates. 

 

- Air in the piping system.  

 • Properly purge all air from the piping system.

- Blown fuse.

 • Replace fuse F5 on the control board, see page 62 of 
 this 

manual. 

- Faulty pump.

 • Replace pump.

- Faulty pump relay.

 • Replace pump relay.

- Internal fault on control board.

 • Replace main control board.

-

 System pressure exceeds relief valve 

 setting.

 • Lower the system pressure below the 150 PSI rating of 
  the supplied relief valve.

       

Installation & Service Manual

TM