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Installation & Operation Manual
12 Maintenance Maintenance and annual startup
Table 12A Service and Maintenance Schedules
Service technician
(see the following pages for instructions)
| General: |
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| • Address reported problems |
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| • Inspect interior; clean and vacuum if | ||||
| necessary; |
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| • Clean condensate trap and fill with fresh | ||||
| water |
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| |
| • Check | for leaks (water, gas, flue, | |||
| condensate) |
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• Verify flue and air lines in good condition | |||||
and sealed tight |
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• Check | system water | pressure/system | |||
START | |||||
piping/expansion tank |
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| • Check control settings |
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ANNUAL | • Check | ignition and | flame | sense | |
electrodes (sand off any deposits; clean | |||||
and reposition) |
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• Check wiring and connections |
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| • Perform | checkout | and | ||
| performance verification per Section 10 | ||||
| of this manual. |
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| • Flame inspection (stable, uniform) | ||||
| • Flame signal (at least 10 microamps at | ||||
| high fire) |
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| • Clean | the heat exchanger if flue | |||
| temperature is more than 54°F above | ||||
| return water temperature. |
|
If combustion or performance indicate need:
•Clean heat exchanger
•Remove and clean burner using compressed air only
•Clean the blower wheel
Owner maintenance
(see the Knight User’s Information Manual for
instructions)
| • Check boiler area |
| • Check pressure / temperature |
Daily | gauge |
|
| • Check vent piping |
| • Check air piping |
Monthly | • Check air and vent termination |
| screens |
| • Check relief valve |
| • Check condensate drain system |
| • Check air vents |
|
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Periodically | • Test low water cutoff (if used) |
| • Reset button (low water cutoff) |
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| • Check boiler piping (gas and |
| water) for leaks |
Every | • Operate relief valve |
6 months |
|
End | • Shut boiler down (unless boiler |
of season | used for domestic hot water) |
months |
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