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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 qualied service
technician. In addition, the maintenance and care of the boiler
designated in Table 4 must be performed to assure maximum
boiler eciency 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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