Chapter 8: Maintenance Schedule - Watts AERCO MLX EXT 321 Installation, Operation & Maintenance Manual

Modulating and condensing boilers
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Modulex Light Commericial Series

CHAPTER 8: Maintenance Schedule

CHAPTER 8: MAINTENANCE SCHEDULE
The boiler must receive regular, annual maintenance and cleaning in order to ensure reliable
and efficient operation. Regular maintenance will prolong the life of the boiler. Refer to Table 8-
1 for a suggested schedule of maintenance procedures.
Maintenance must be performed annually.
CAUTION!
To ensure the continued safe and efficient operation of the boiler it is highly recommended that
it be checked at regular intervals and serviced when necessary, and that only original spare
parts be used. Regular maintenance will prolong the life of the boiler.
WARNING!
If the boiler is not checked and serviced regularly it could cause damage to the equipment
and/or harm to persons.
TABLE 8-1: Modulex EXT Maintenance Schedule
MAINTENANCE OPERATION
Inspect for acceptable circulating and feed water quality and
chemistry.
Inspect gas assembly components.
Inspect safety devices for water and gas.
Inspect and clean the combustion chamber & burners.
Inspect and clean flame rod and ignitor.
Inspect and clean the fan/blower.
Check the operation of the fan/blower.
Check gas pressure and adjust if necessary.
Inspect and clean the flue exhaust assembly.
Check all water connections and valves.
Do combustion analysis and recalibrate if necessary.
Check electrical and electronic components
Inspect condensate drain pipe and trap, clean if necessary.
Check flow switch in the CSD-1 manifold for proper function.
OMM-0087_J • GF-143 • 11/17/2020
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
CHECK ONCE
CHECK EVERY
A YEAR
2 YEARS
Page 125 of 150

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