168
EA1 extension
Fig. 129
F1
MCB/fuse
DE1
Digital input 1
DE2
Digital input 2
DE3
Digital input 3
0
–
10V 0
–
10 V input
fÖ
Power supply
fÖ
A
Power supply for additional accessories
aBJ
Central fault message/feed pump/DHW circula-
tion pump (potential-free)
Connect DHW circulation pumps with stand-
alone functions directly to the 230 V
∼
supply.
aVG
KM BUS
Digital data inputs DE1 to DE3
Alternatively, the following functions can be connected:
■
External operating program changeover for each
heating circuit
■
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 making
the connection, adhere to the requirements of protec-
tion class II: 8.0 mm air and creep paths and 2.0 mm
insulation thickness against 'live' components.
Input function assignment
Select the input functions via the codes in the
"Gen-
eral"
group at the boiler control unit:
■
DE1: Coding address 3A
■
DE2: Coding address 3b
■
DE3: Coding address 3C
Assigning the operating program changeover
function to the heating circuits
Select the operating program changeover function for
the respective heating circuit via coding address d8 in
the
"Heating circuit"
group at the boiler control unit:
■
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 operating program changeover is
selected via coding address d5 in the
"Heating cir-
cuit"
group.
Function description
External extensions (accessories)
(cont.)
5775 636 GB
Functions
Содержание C3TB
Страница 44: ...44 3 5 1 2x 2 4 7 6 Fig 43 Installation sequence Fitting the front panels 5775 636 GB Installation ...
Страница 48: ...48 14 Fig 47 Installation sequence If required for easier handling Dismantling cont 5775 636 GB Installation ...
Страница 136: ...136 Troubleshooting Repairs gas condensing module cont 5775 636 GB Diagnosis ...
Страница 143: ...143 Parts lists Heat cell assembly 5775 636 GB Components ...
Страница 148: ...148 0001 0001 0003 0003 0002 0002 0004 Fig 118 Parts lists External connection assembly 5775 636 GB Components ...
Страница 154: ...154 0006 0003 0005 0001 0002 0004 Fig 121 Parts lists Miscellaneous assembly 5775 636 GB Components ...
Страница 160: ...160 Parts not shown 0009 PCB IU100 B30 Parts lists Fuel cell assembly 5775 636 GB Components ...
Страница 161: ...161 Parts lists Fuel cell assembly cont 5775 636 GB Components ...
Страница 187: ...187 5775 636 GB ...