142
Function assignment
Function
Code ("General" group)
Output A1
Output A2
DHW circulation pump
sK
33:0
34:0 (delivered condition)
Heating circuit pump
sÖ
33:1 (delivered condition)
34:1
Circulation pump for cylinder heating
sA
33:2
34:2
EA1 extension
Fig. 88
F1
MCB/fuse
DE1
Digital input 1
DE2
Digital input 2
DE3
Digital input 3
0
–
10 V 0
–
10 V input
fÖ
Power supply
fÖ
A
Power supply for additional accessories
aBJ
Central fault message/feed pump/DHW circu-
lation pump (potential-free)
aVG
KM-BUS
Digital data inputs DE1 to DE3
The following functions can alternatively be connected:
■
External operating program changeover for each
heating circuit
■
External blocking
■
External blocking with fault message input
■
External demand with minimum flow temperature
■
Fault message input
■
Brief operation of the DHW circulation pump
External contacts must be potential-free. When con-
necting, observe the requirements of protection
class II, i.e. 8.0 mm air and creep path and 2.0 mm
insulation thickness to live parts.
Input function assignment
Select the input functions via codes in the
"General"
group in the heat generator control unit:
■
DE1: Coding address 3A
■
DE2: Coding address 3b
■
DE3: Coding address 3C
Function description
External extensions (accessories)
(cont.)
5678 044 GB
Functions
Summary of Contents for D2RA
Page 113: ...113 Maintenance Checking the Vitotronic 200 H accessories cont 5678 044 GB Maintenance ...
Page 133: ...133 Parts lists Sorption module hydraulics cont 5678 044 GB Components ...
Page 136: ...136 0001 0002 0003 0004 0005 Fig 83 Parts lists Miscellaneous 5678 044 GB Components ...
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