Viessmann CIB User Manual

85
EA1 extension
Fig. 48
DE1 Digital input 1
DE2 Digital input 2
DE3 Digital input 3
F1 Fuse
0 - 10 V 0 to 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 one
heating circuit each
■
External blocking
■
External blocking with fault message input
■
External demand with minimum boiler water temper-
ature
■
Fault message input
■
Brief operation of the DHW circulation pump
External contacts must be potential-free. When con-
necting external contacts, observe the requirements of
protection class II: 8.0 mm air and creep path or
2.0 mm insulation thickness to live parts.
Input function assignment
The functions of the inputs are selected via the codes
on the boiler control unit:
■
DE1: Code 3A
■
DE2: Code 3b
■
DE3: Code 3C
Assigning the operating program changeover
function to the heating circuits
The heating program changeover function for the
respective heating circuit is assigned at the boiler con-
trol unit via code d8:
■
Changeover via input DE1: Code d8:1
■
Changeover via input DE2: Code d8:2
■
Changeover via input DE3: Code d8:3
The effect of the heating program changeover is selec-
ted with code d5.
Set the duration of the changeover via code F2.
Function description
External extension (accessories) (cont.)
5839829
Functions

Viessmann CIB Specifications

General

Brand	Viessmann
Model	CIB
Category	Boiler
Language	English