Servicing
5
58
Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 02/2006
Buderus • http://www.buderus-domestic.co.uk
Subject to modifications resulting from technical improvements!
5.3.28 Checking connections at the ModuLink or
i
RT
z
Check contact link between cable and ModuLink or
i
RT.
z
There should be a DC voltage of approx. 11.5 V at the
ModuLink or
i
RT.
5.3.29 Checking KIM connections
z
Locate KIM on boiler frame under UBA housing.
z
Check 4 pin connector (fig. 88, item 1) is fitted and secure.
Fig. 87 Checking the controller-device connections at the
boiler
Key to control-device connections:
Item 1:
ON/OFF temperature controller
Item 2:
ModuLink or
i
RT room temperature controller (digital)
Item 3:
I/O port / communication port
Item 4:
Outdoor-temperature sensor
Item 5:
Power supply 24 VAC/max. 6 VA
Item 6:
Turn-on voltage for three-way valve (9+11)
1
2
3
4
5
6
NOTE
It is possible, in order to limit the source of
errors, to disconnect the ModuLink or
i
RT from
the boiler (bridge required at 3 and 4) and to
install a conductor bridge at 1 and 2 (fig. 87).
The heating and hot-water requirement is then
passed via the potentiometer setting of the
UBA.
Fig. 88 KIM connections
1
NOTE
This is not a serviceable part and any fault
identified with this component, contact
Buderus.