Replacing Components - NTI FTVN085 Installation Start-Up Maintenance

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.
DANGER
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 flue gases to leak and result in serious
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
flow 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.
WARNING
Ensure the combi boiler DHW heating system has been valved
off from the system and drained BEFORE attempting to remove
the DHW filter. 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.
Cleaning the DHW Filter (Combi Models ONLY)
1. Remove the clip on the flow meter (1).
2. Remove the flow meter cap (2).
3. Remove the flow meter turbine (3).
4. Remove and clean the filter (4).
Figure 91 - Removing the DHW Filter
92
5. Clean the filter with a toothbrush and clean running water.
6. Reinstall the DHW inlet filter.
7. Refill the DHW circuit following the filling and purging instructions
in this manual.
8. Restore gas and power to the boiler.
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 off. Then turn the main electrical power to the boiler off
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 shutoff 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.
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.
DANGER
Failure to replace a damaged sealing ring will result in exhaust
gas leaks, substantial property damage, severe personal injury, or
death.
5. Proceed in the reverse order to reinstall the components.