24
AttENtIoN:
the 230 V cables
must run far apart from
24V cables.
-
(Y2 - 9 and terminal board M2)
after removing the jumper.
Danger!
Only a qualified technician may perform the
electrical installation.
Before performing connections or any type of
operation on electrical parts, always discon-
nect electrical power and make sure that it
cannot be reconnected accidentally.
Electrical connection to the main power supply
this connection must be made up to standard, as
required the regulations in force.
Remember that a bipolar switch must be installed
on the boiler power line with over 3 mm between
contacts, easy to access, making maintenance
quick and safe.
Electric power supply connection
TA connection (*)
(*) Optional
NOTE!
Further details in the section
‘‘Technical Information’’ on the boiler
page of the www.unicalag.it website
ATTENTION!
Size of power supply cables according to the
boiler's power, thus of absorbed current, ac
-
cording to standards.
See chap. 4.5, the ammeter capacity, indi-
cated for each model of SPK,
(main protective fuses).
3 X 0.75, is the minimum section to use on
boilers SPK 150 / 230 / 300.
ATTENTION!
comply with the PHASE and NEutRAL po-
larity since flame detection is Phase Sensi
-
tive.