Service Manual
2Maintenance
Maintenance and annual startup
Service technician
(see the following pages for instructions)
General:
•Address reported problems
•Inspect interior; clean and vacuum if necessary;
•Clean condensate trap and fill with fresh water
•Check for leaks (water, gas, flue, condensate)
•Verify flue and air lines in good condition and sealed tight
UP | •Check | system water | pressure/system | ||
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START- | piping/expansion tank |
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• Check control settings |
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• Check ignition and flame sense |
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ANNUAL | 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 | ||||
| in the Knight Wall Mount Installation and | ||||
| Operation Manual. |
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| • Flame inspection (stable, uniform) |
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| • 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. |
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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 Wall Mount User’s Information
Manual for instructions)
• Check boiler area
Daily | • Check pressure/temperature |
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| gauge |
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| • Check vent piping |
| • Check air piping |
| • Check air and vent termination |
| screens |
Monthly
•Check relief valve
•Check condensate drain system
•Check automatic air vents
| •Test low water cutoff (if used) | |
Periodically |
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| • Reset button (low water cutoff) | |
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| • Check boiler piping (gas and | |
Every | water) for leaks | |
6 months |
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| • Operate relief valve | |
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End | •Shut boiler down (unless boiler | |
of season | ||
used for domestic hot water) | ||
months | ||
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