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Installation & Operation Manual
11 Maintenance
Check flame signal
1. At high fire the flame signal shown on the display should
be at least 10 microamps.
2. A lower flame signal may indicate a fouled or damaged
flame sense electrode. If cleaning the flame sense
electrode does not improve, ground wiring is in good
condition, and ground continuity is satisfactory, replace
the flame sense electrode.
3. See Section 3 - Troubleshooting in the SYNC Service
Manual for other procedures to deal with low flame
signal.
Review with owner
1. Review the SYNC User’s Information Manual with the
owner.
2. Emphasize the need to perform the maintenance
schedule specified in the SYNC User’s Information
Manual (and in this manual as well).
3. Remind the owner of the need to call a licensed
contractor should the boiler or system exhibit any
unusual behavior.
4. Remind the owner to follow the proper shutdown
procedure and to schedule an annual start-up at the
beginning of the next heating season.
Cleaning boiler heat exchanger
1. Shut down boiler:
• Follow the “To Turn Off Gas to Appliance” instructions
for the boiler in Section 9 - Startup.
• Do not drain the boiler unless it will be exposed to
freezing temperatures. If using freeze prevention fluid
in system, do not drain.
2. Allow time for the boiler to cool to room temperature if it
has been firing.
3. Remove the blower assemblies (gas air/arm) from the
heat exchanger access covers. Set bolts aside.
4. Remove the nuts securing the heat exchanger access
covers to the heat exchangers and set aside.
5. Remove the heat exchanger access covers, cover gaskets
and chamber insulation assemblies.
The boiler contains ceramic fiber
materials. Use care when handling these
materials per instructions on page 59 of
this manual. Failure to comply could
result in severe personal injury.
6. Use a vacuum cleaner to remove any accumulation on the
boiler heating surfaces. Do not use any solvent.
7. Finish cleaning using a clean cloth dampened with warm
water.
8. Install access cover gaskets, chamber insulation assemblies
and covers.
9. Secure nuts on the studs. DO NOT overtighten.
10. Re-install the blower assemblies (gas air/arm) using the
bolts set aside in Step 3.
11. Close isolation valves on piping to isolate boiler from
system. Attach a hose to the boiler drain and flush boiler
thoroughly with clean water by using purging valves to
allow water to flow through the water make-up line to the
boiler.
12. When the boiler has been flushed, restore boiler to
operation.
13. Perform start-up and check-out procedures in Section 9 -
Start-up.
ƽ WARNING