Maintaining The Parts - Navien LCB700-21RS Installation & Operation Manual

12.5 Maintaining the Parts

WARNING
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 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 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.
Addressing the Reported Problems
Inspect any problems reported by the owner and correct before
proceeding.
Inspecting the Installation Area
1. Verify that boiler area is free of any combustible materials,
petrol and other flammable vapours and liquids.
2. Verify that air intake area is free of any of the contaminants
listed in Installation & Operation 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
flue lines per the Installation & Operation Manual.
Inspecting the Boiler Interior
1. Remove the front cover and inspect the interior of the boiler.
2. Vacuum any sediment from inside the boiler and
components. Remove any obstructions.
Cleaning the Condensate Trap
1. Loosen the eight screws on the condensate trap cover and
remove the cover, case packing, ball, ball packing, ball guide
packing, and ball guide.
Screw
Condensate
Trap Cover
Case
Packing
Ball
Ball Packing
Ball Guide
Packing
Ball Guide
Condensate
Trap Case
Drain Cork
2. Inspect the condensate drain line, condensate fittings,
condensate trap, and the drain cork.
3. Remove any sediment from the trap.
4. Fill with fresh water until the water begins to pour out of the
drain.
Checking all Piping for Leaks
Eliminate all system or boiler leaks. Continual fresh makeup
water will reduce boiler life. Minerals can build up in sections,
reducing heat transfer, overheating heat exchanger, and causing
heat exchanger failure. Leaking water may also cause severe
property damage.
1. Inspect all water and oil piping and verify to be leak free.
2. Look for signs of leaking lines and correct any problems
found.
Checking the Flue System and Air Piping
1. Visually inspect the entire gas flue system for blockage,
deterioration or leakage. Repair any joints that show signs
of leakage.
2. Verify that boiler flue discharge and air intake are clean and
free of obstructions.
Maintaining the Boiler 71