Technical data

ProCon HT 150 / HT 225 2. Installation
• Outdoor temperature sensor
Connect the outdoor sensor with a two-core cable
(interchangeable ) to the ATS terminal . See table below for cable
profile:
• Bus clip-in OCI 420
The bus module makes it possible for the boiler control
system to communicate with RVA series external control
devices
Table 6:
For resistance value s see diagrams in Chap 7.3
• BUS
The L o c a l Proc ess Bus (LPB) is used as the communication
base for setting up a system with additional MHG heating
circuit controllers or external controllers.
The terminal is open if the input is not in use.
The functions of the L P B are described in detail in the MBW RVA
47.320 instruction manual included in the scope of delivery
The maximum wire length of a double wire circuit for the bus
is 100m.
• DW pump
Connects to an ex ternal d omestic water charge pump . The boiler is
equipped with an internal water deflector .
• HC Pump
Connects to an external heating circuit pump. The boiler is
equipped with an internal water deflector.
• Mains connection
Connection to the mains is carried out on the terminal block with a
3 x 1.5 mm
2
cable cross-section.
Make sure that ground and phase are not mixed up
If an under floor heater runs directly with the boiler,
then the recommended safety temperature limiter of
the under floor heater should be looped into the
mains lead of the under floor heating circuit/
circulation pump boiler .
Fig 14: Installation of bus clip-in
The Bus clip-in is snapped directly unto the boiler control
system and connected to the boiler control with a five-core
ribbon cable (Terminal X40). (See pictures below).
There is a 2-pin plug available for connecting to the L P B bus
25
Length
[m]
Minimum section [mm²]
Up
to18
0.125
18…35 0.25
35…50 0.5