Additional information
94
System components
Line voltage motherboard, Part No. 7165 782
The motherboard contains:
Relays and outputs for activating
the pumps, the control elements
and the burner
Plug-in location for power supply
unit board and boiler control
section
Low-voltage motherboard, Part No. 7820 290
The motherboard contains:
Plugs for sensors, communication
connections and external
equipment
Plug-in locations for electronics
board, LON communication module,
programming unit, boiler coding
card and Optolink board
Power supply unit board, Part No. 7823 991
The power supply unit board
contains the low-voltage supply
for the entire electronics.
Electronics board, Part No. 7828 193
The board contains the
microprocessor with the software
When replacing the board:
1.
Make a note of codings and
settings on the control unit.
2.
Replace the board.
3.
Set coding ”8A: 176” and set
coding address ”92” (not listed
in the overview) to ”92: 165”.
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