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Part number 550-143-013/0621
25
Series 3 
Annual service and start-up
e boiler should be inspected and started annually, at the
beginning of the heating season, only by a qualied service
technician. In addition, the maintenance and care of the boiler
designated in Table 4 must be performed to assure maximum
boiler eciency and reliability. See the following pages for
detailed instructions. Failure to service and maintain the
boiler and system could result in equipment failure.
Electrical shock hazard — Turn o power
to the boiler before any service operation
on the boiler except as noted otherwise in
this instruction manual. Failure to turn o
electrical power could result in electrical
shock, causing severe personal injury or
death.
 
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
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