NTI FTVN - Page 91

91
Part 1 - General Safety Information
Part 14 - Maintenance
7. Check condensate piping for sagging and/or leakage. Repair any
sags or leaks before restoring power to the boiler.
8. If the boiler has a condensate pump, ensure the pump operates
properly before considering maintenance complete.
Cleaning the DHW Filter (Combi Models ONLY)
1. Remove the clip on the ow meter (1).
2. Remove the ow meter cap (2).
3. Remove the ow meter turbine (3).
4. Remove and clean the lter (4).
5. Clean the lter with a toothbrush and clean running water.
6. Reinstall the DHW inlet lter.
7. Rell the DHW circuit following the lling and purging instructions
in this manual.
8. Restore gas and power to the boiler.
When servicing is complete, make sure the siphon cap and retaining
clip are replaced securely. The condensate trap assembly MUST
BE PROPERLY INSTALLED according to these instructions when
operating the boiler. Operating the boiler without the condensate
trap assembly will cause ue gases to leak and result in serious
personal injury or death.
DANGER
WARNING
Ensure the combi boiler DHW heating system has been valved
off from the system and drained BEFORE attempting to remove
the DHW lter. Failure to do so could result in property damage,
serious personal injury, or death.
Water drained from the boiler could be scalding hot. Wait for the
boiler to cool before draining water, and take precautions when
draining water. Failure to do so could result in property damage,
personal injury, or death.
CAUTION
It is very important that the condensate piping be no smaller than
¾”. To prevent sagging and maintain pitch, condensate piping
should be supported with pipe supports, and pitched ¼” per foot
to allow for proper drainage.
The condensate line must remain unobstructed, allowing free
ow of condensate. If condensate freezes in the line, or if line is
obstructed in any other manner, condensate can exit from the tee,
resulting in potential water damage to property.
D. Replacing Components
At any point in time over the boiler’s service life it may be necessary
to replace boiler components. If the boiler displays an error message,
determine its cause and possible remedies.
If the remedy is replacement of a component, ensure:
1. That the boiler is powered OFF. Press the ON/OFF button to turn
the boiler o. Then turn the main electrical power to the boiler o
at the circuit breaker.
2. The boiler electrical connection is connected properly. A loose
electrical connection could the root cause of problems.
3. The front cover has been removed.
4. The main shuto gas valve is closed.
5. All water valves to and from the boiler (supply, return, inlet, outlet)
are closed.
6. If necessary, the water has been drained from the boiler and/or
appropriate circuit.
7. No water can get into the display / control panel.
Figure 88 - Removing the DHW Filter
Failure to replace a damaged sealing ring will result in exhaust
gas leaks, substantial property damage, severe personal injury, or
death.
DANGER
5. Proceed in the reverse order to reinstall the components.
Replacing the Burner
1. Remove the front cover and pivot the electronic housing following
the instructions described in Removing the Cabinet Cover and
Inspecting the Boiler.
2. Remove the combustion assembly as described in Cleaning the
Heat Exchanger Combustion Chamber.
3. Remove, inspect, and replace the burner as described in Checking
the Burner.
4. Replace all damaged seals that are damaged or showing signs of
wear.