Buderus 800 - Page 21

Installation 1
Wall-mounted condensing gas boiler Buderus 800 - Subject to modifications resulting from technical improvements!
21
If the boiler has to be temporarily put into operation
without control unit, place a conducting bridge in
terminal 12 and set the feed temperature and the
required heating capacity on the UBA.
1.9.5 Buderus room temperature control device
connection
 Remove the bridge in terminal 34 (fig. 22, item 2)
and connect the control unit to the terminal strap.
 Remove the wire in terminal 12 (fig. 22, item 1).
1.9.6 230V room-temperature control device connection
 Remove the cover of the RTH converter (fig. 22,
item 6).
 Lead the control device wire through the cable lead
(fig. 22, item 8).
 Fix the wire to terminal 1 and 2 of the 230 Volt con-
nection (fig. 22, item 9).
 Secure the wire with the bracket and the two screws
onto the RTH converter.
1.9.7 Volt free external control device connection
 Remove the cover of the RTH converter (fig. 22,
item 6).
 Lead the control device wire through the cable lead.
 Fix the wire to terminal 1 and 2 of the volt free con-
nection (fig. 22, item 10).
1.9.8 Service tool
The service tool allows you to determine the operating
status of the boiler, check components and carry out fast
fault
diagnosis.
 Open the flap at the front of the boiler unit and insert
the twin plug connector of the service tool into the
sockets provided (fig. 23, item 1).
fig. 22 Connecting the control unit
Key to fig. 22:
item 1: ON/OFF temperature controller (non-conducting
bridge)
item 2: Room temperature controller iRT (digital)
item 3: I/O port/communication port
item 4: Outdoor temperature sensor
item 5: Power supply 24 VAC/max: 6 VA switching voltage
three-way valve (9+11)
item 6: RTH converter
item 7: 24 VAC connection
item 8: 230 VAC connection
item 9: Volt free connection
2
4
5
6
7
8
10
11
12
1
3
1
2
3
4
9
5
6
0 VAC
0 V
24 VAC
- max. 6VA
1
2
3
4
5
6
10
9
7
8
NOTE
RTH converter is no longer in use.
fig. 23 Service-tool connection
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