Navien NCB-20LHWE, Руководство по установке и эксплуатации

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If hot water will not flow and you suspect that the boiler is
frozen, follow these steps:
1. Press the Power button on the front panel to turn off the
boiler.
2. Close the gas valve.
Gas Valve
Opened Closed
3. Open the hot water tap that is closest to the boiler.
4. Use a hair dryer or a portable electric heater to heat up both
the primary and secondary heat exchangers.
5. Check every few minutes to see if water is running at the
open tap.
6. When the water starts flowing again, check the boiler and
piping for leaks. If you detect any leaks or the boiler is not
operating properly, contact an authorised technician or
licensed professional.
Note This boiler requires very little maintenance, however
a qualified technician should inspect the boiler at the
beginning of every heating season and/or when there
is a problem.
12.5 Maintenance Schedules
Owner maintenance
Daily
Check boiler area
Check pressure / temperature gauge
Monthly
Check flue piping
Check condensate drain
Periodically Check flue termination screens
Every 6 months
Check boiler piping (gas and water) for
leaks
Non-heating
season
Shut boiler down (unless boiler used for
domestic hot water)
Service technician (See the following instructions)
Annual Start-up
General:
Address reported problems
Inspect interior; clean and vacuum if
necessary
Clean condensate trap and fill with fresh
water
Check for leaks (water, gas, flue,
condensate)
Verify flue and air lines are in good
condition and sealed tight
Check system piping
Check control settings
Check ignition and flame rod (clean and
reposition)
Check wiring and connections
Flame inspection (stable, uniform)
Flame signal
If combustion or performance indicate
need:
Clean heat exchanger
Remove and clean return adapter filter
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. Inspect the condensate drain line, condensate fittings, and
condensate trap.
2. Remove any sediment from the trap.
3. 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 gas 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. Verify that air inlet pipe is connected and properly
sealed (if installed).
2. Verify that boiler flue discharge and air intake are clean and
free of obstructions.
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.
59 Maintaining the Boiler