FB-MODB Rev A
This manual must only be used
by a qualifi ed heating installer /
service technician. Read all
instructions, including this manual,
the Installation and Operation
Manual, and the Service Manual,
before installing. Perform steps in
the order given. Failure to comply
could result in severe personal
injury, death, or substantial property
damage.
WARNING
Save this manual for future reference.
MODBUS COMMUNICATION
INSTRUCTIONS
Crest Models: 1.5 - 3.5
