Operating instructions

21
r
2. Simultaneously turn rotary selectors
"
tw
" and "
tr
" to their central posi-
tion.
"SERV" appears on the display.
rr
3. Within 2 s turn rotary selector "rt"
to the top right area.
"
r
" and the set value flash on the
display.
4. Adjust the control unit to stage 1 or 2
by turning rotary selector "
tw
".
The display shows:
■ "1"for operation with stage 1
or
■ "2"for operation with stage 2
5. Do not adjust the rotary selectors for
15 s. The set operating mode is then
saved and the control unit returns to
standard mode.
Changing to operation with LPG
In the delivered condition, the boiler is
set up for operation with natural gas. For
operation with LPG, the gas nozzle must
be changed and the gas type converted
in the control unit.
Separate installation instruc-
tions.
Changing from LPG to natural gas - see
page 49
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5366 836 GB
Service