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Installation & Operation Manual
Models: 399 - 800
This manual must only be used by a
qualified heating installer / service
technician. Read all instructions,
including this manual and the
Knight XL Service Manual, before
installing. Perform steps in the order
given. Failure to comply could result
in severe personal injury, death, or
substantial property damage.
ƽ WARNING
Save this manual for future reference.
KBX-I-O Rev E