Maintenance Schedules - Navien LCB700-21RS Installation & Operation Manual

If hot water will not flow and you suspect that the boiler is
frozen, follow these steps:
1. Press the Power button (
the boiler.
2. Close the oil line valve.
Open 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.
This boiler requires very little maintenance, however
Note
a qualified technician should inspect the boiler at the
beginning of every heating season and/or when there
is a problem.
70 Maintaining the Boiler
) on the front panel to turn off
Oil Line
Valve

12.4 Maintenance Schedules

Owner maintenance
Check boiler area
Daily
Check pressure/temperature gauge
Check flue piping
Monthly
Check condensate drain
Periodically Check flue termination screens
Check boiler piping (oil and water) for
Every 6 months
leaks
Non-heating Shut boiler down (unless boiler used for
season domestic hot water)
Service technician (See the following instructions)
General:
Address reported problems
Inspect interior; clean and vacuum if
necessary
Clean condensate trap and fill with fresh
water
Check for leaks (water, oil, flue,
condensate)
Verify flue and air lines are in good
condition and sealed tight
Check system piping
Check control settings
Annual Start-up
Check ignition and UV sensor (clean and
reposition)
Clean oil filter
Replace old flexible oil hose and oil
nozzle with new ones
Check wiring and connections
If combustion or performance indicate
need:
Clean heat exchanger
Remove and clean return adapter filter