10
Installation
Summary of electrical connections
(cont.)
Plug 230 V~
sÖ
Heating circuit pump A1
(accessory)
sÖ
Heating circuit pump mixer
circuitM2 (accessory)
sA
Cylinder primary pump
(accessory)
sK
DHW circulation pump (on site)
fÖ
Mains power connection
fA
Burner
gS
Mixer motor (accessory)
X12 External burner start (stage1)
Low voltage plug
!
Outside temperature sensor
?
Flow temperature sensor
(accessory)
§
Boiler temperature sensor
%
Cylinder temperature sensor
aG
Flue gas temperature sensor
(accessory)
aJ
Return temperature sensor
(accessory)
aVG
KM BUS user or distributor
(accessory)
a:A
Two−stage/mod. burner
extension (part of the standard
boiler delivery)
When connecting external switching
contacts or components to the
protective low voltage of the control
unit, please observe the safety
requirements of protection class II,
i.e. 8.0 mm air gap/creeping distance
or 2.0 mm insulation thickness from
’live’ components.
Ensure a safe electrical separation
for all on−site components (incl.
PC/laptops) to EN60335 or IEC65.
5862700GB