38
A.
KM821
‐
I5,
System
Manager
and
TTL
‐
VariCAN
adapter
only
Boiler
1,
Master
configuration
options
Boiler
n,
Slave
configuration
options
Extension
Module
configuration
options
Sequence
control
1
‐
16
boilers
Sequence
control
1
‐
16
boilers,
Boiler
n
Extension
module
with
1
x
Mixing
circuit
S
‐
FT
RT
‐
SC
RT
‐
MC
S
‐
RT
‐
SC
S
‐
RT
‐
MC
S
‐
OT
B1
Bn
Bn
S
‐
OT
‐
MC
V
‐
MC
P
‐
MC
S
‐
FT
‐
MC
P
‐
B
P
‐
B
P
‐
B
*SL1
is
Plant
control
*OT1
or
RT
‐
MC
Sequence
control
Sequence
control,
Boiler
n
Heating
circuit,
Mixing
Sequence
control
1
‐
16
boilers
with
Mixing
header
and
System
pump
Sequence
control
1
‐
16
boilers,
Boiler
n
with
CT
Pump
circuit
Extension
module
with
2
x
Mixing
circuits
S
‐
FT
P
‐
SC
RT
‐
SC
S
‐
RT
‐
PC
RT
‐
PC
RT
‐
MC1
RT
‐
MC2
S
‐
RT
‐
SC
S
‐
RT
‐
MC1
S
‐
RT
‐
MC2
S
‐
OT
B1
Bn
S
‐
OT
‐
PC
Bn
P
‐
PC
S
‐
OT
‐
MC1
V
‐
MC1
S
‐
OT
‐
MC2
V
‐
MC2
P
‐
MC1
P
‐
MC2
S
‐
FT
‐
MC1
S
‐
FT
‐
MC2
P
‐
B
P
‐
B
P
‐
B
*SL1
is
Plant
control
*Opentherm
or
SL1
Sequence
control
Sequence
control,
Boiler
n
CT
Pump
Circuit
SL1
is
Heating
Circuit
control
Heating
circuit,
Mixing
circuit
1
Heating
circuit,
Mixing
circuit
2
Sequence
control
1
‐
16
boilers
with
Indirect
Hot
Water
Storage
Tank
Sequence
control
1
‐
16
boilers,
Boiler
n
with
CT
Pump
circuit
and
Indirect
HWS
circuit
Extension
module
with
1
x
Mixing
circuit
and
1
x
CT
Pumped
circuit
S
‐
FT
RT
‐
SC,
T
‐
HWS
S
‐
RT
‐
PC
RT
‐
PC,
T
‐
HWS
RT
‐
MC
S
‐
RT
‐
PC
RT
‐
PC
S
‐
RT
‐
SC
S
‐
RT
‐
MC
S
‐
OT
B1
Bn
P
‐
HWSC
S
‐
OT
‐
PC
Bn
P
‐
PC
P
‐
HWSC
S
‐
OT
‐
MC
V
‐
MC
S
‐
OT
‐
PC
P
‐
PC
S
‐
FT
‐
PC
TS
‐
HWS
TS
‐
HWS
P
‐
MC
S
‐
HWS
S
‐
HWS
S
‐
FT
‐
MC
P
‐
B
P
‐
B
P
‐
B
*SL1
is
Plant
control
*Opentherm
or
SL1
Sequence
control
Hot
Water
Storage
SL2
or
(SL2
and
T
‐
HWS:Opentherm
DHW
bit)
Sequence
control,
Boiler
n
CT
Pump
Circuit
Hot
Water
Storage
SL1
is
Heating
Circuit
control
Heating
circuit,
Mixing
CT
Pump
Circuit
SL2
or
(SL2
and
T
‐
HWS:Opentherm
DHW
bit)
Sequence
control
1
‐
16
boilers
with
a
CT
Pump
circuit
Sequence
control
1
‐
16
boilers,
Boiler
n
with
2
x
CT
Pump
circuit
Extension
module
with
1
x
Mixing
circuit
and
1
x
Air
Handler
circuit
S
‐
FT
S
‐
RT
‐
PC
RT
‐
SC
S
‐
FT
S
‐
RT
‐
PC1
S
‐
RT
‐
PC2
RT
‐
PCn
RT
‐
MC
S
‐
RT
‐
HC
RT
‐
HC
S
‐
RT
‐
SC
S
‐
RT
‐
SC
S
‐
RT
‐
MC
S
‐
OT
B1
Bn
P
‐
PC
S
‐
OT
‐
PC
Bn
P
‐
PC1
P
‐
PC2
S
‐
OT
‐
MC
V
‐
MC
S
‐
OT
‐
HC
P
‐
HC
S
‐
FT
‐
HC
P
‐
MC
AH
‐
HC
S
‐
FT
‐
MC
P
‐
B
P
‐
B
P
‐
B
*SL1
is
Plant
control
*Opentherm1
or
SL1,
Opentherm2
or
SL2
Sequence
control
CT
Pump
Circuit
Sequence
control,
Boiler
n
CT
Pump
Circuit
1
CT
Pump
Circuit
2
SL1
is
Heating
Circuit
control
Heating
circuit,
Mixing
Heater
Circuit
SL2
is
Heating
Circuit
control
Sequence
control
1
‐
16
boilers
with
Common
pump
and
optional
valves
Extension
module
with
1
x
Mixing
circuit
and
1
x
HWS
circuit
S
‐
FT
RT
‐
SC
RT
‐
MC,
T
‐
HWS
S
‐
RT
‐
SC
S
‐
RT
‐
MC
S
‐
OT
B1
Bn
S
‐
OT
‐
MC
V
‐
MC
PP
‐
HWS
SP
‐
HWS
P
‐
MC
TS
‐
HWS
S
‐
FT
‐
MC
S
‐
ST
‐
HWS
V
‐
B
V
‐
B
P
‐
SC
*SL1
is
Plant
control
Sequence
control
Heating
circuit,
Mixing
Hot
Water
Storage
Sequence
control
1
‐
16
boilers,
with
local
DHW
demand
Extension
module
with
2
x
Air
Handler
circuit
V
‐
DHW
S
‐
FT
RT
‐
SC
S
‐
RT
‐
HC1
RT
‐
HC1
S
‐
RT
‐
HC2
RT
‐
HC2
S
‐
RT
‐
SC
S
‐
OT
‐
HC1
P
‐
HC1
S
‐
OT
‐
HC2
P
‐
HC2
S
‐
OT
B1
Bn
S
‐
FT
‐
HC1
S
‐
FT
‐
HC2
TS
‐
HWS
AH
‐
HC1
AH
‐
HC2
S
‐
HWS
P
‐
B
P
‐
B
Heater
Circuit
Heater
Circuit
*SL1
is
Plant
control
Sequence
control
Extension
module
with
1
x
CT
pumped
circuit
and
1
x
HWS
circuit
Single
Boiler
with
a
CT
Pump
circuit
and
DHW
tank
S
‐
RT
‐
PC
RT
‐
MC,
T
‐
HWS
S
‐
RT
‐
PC
RT
‐
PC,
T
‐
HWS
S
‐
OT
‐
PC
P
‐
PC
PP
‐
HWS
SP
‐
HWS
S
‐
OT
P
‐
PC
P
‐
HWSC
S
‐
FT
‐
PC
TS
‐
HWS
TS
‐
HWS
S
‐
ST
‐
HWS
S
‐
HWS
CT
Pump
Circuit
Hot
Water
Storage
*Opentherm
or
SL1
Boiler
CT
Pump
Circuit
Hot
Water
Storage
SL2
or
(SL2
and
T
‐
HWS:Opentherm
DHW
bit)
Extension
module
with
1
x
CT
pumped
circuit
and
1
x
HWS
circuit
Single
Boiler
with
2
x
CT
Pump
circuits
S
‐
RT
‐
PC1
RT
‐
PC1
S
‐
RT
‐
PC2
RT
‐
PC2
S
‐
OT
‐
HWS
PP
‐
HWS1
PP
‐
HWS2
SP
‐
HWS1
SP
‐
HWS2
S
‐
OT
P
‐
PC1
P
‐
PC2
TS
‐
HWS1
TS
‐
HWS2
S
‐
ST
‐
HWS1
S
‐
ST
‐
HWS2
Hot
Water
Storage
Hot
Water
Storage
*Opentherm1
or
SL1,
Opentherm2
or
SL2
Boiler
CT
Pump
Circuit
CT
Pump
Circuit
Extension
module
with
Mixing
control
to
Plate
Heat
Exchanger
for
Direct
HWS
Single
Boiler
with
CT
and
HWS
Zone
circuits
S
‐
DHW
SP
‐
HWS
DHW
out
S
‐
RT
‐
PC1
RT
‐
PC1,
TS
‐
HWS
V
‐
MC
S
‐
OT
‐
HWS
S
‐
OT
S
‐
FT
‐
HWS
V
‐
CT
V
‐
HWS
S
‐
FT
‐
MC
TS
‐
HWS
TS
‐
HWS
S
‐
M
‐
HWS
S
‐
HWS
S
‐
B
‐
HWS
P
‐
SYS
*Opentherm
or
SL1
P
‐
MC
Boiler
CT
Pump
Circuit
Hot
Water
Storage
SL2
or
(SL2
and
T
‐
HWS:Opentherm
DHW
bit)
P
‐
HWS
CWS
in
Single
Boiler
with
2
x
CT
Zone
circuits
Direct
HWS
S
‐
RT
‐
CT1
RT
‐
PC1
S
‐
RT
‐
CT2
RT
‐
PC2
Extension
module
with
Mixing
control
to
Plate
Heat
Exchanger
for
Direct
HWS
with
DHW
pump
S
‐
OT
V
‐
CT1
V
‐
CT2
S
‐
DHW
SP
‐
HWS
DHW
out
V
‐
MC
S
‐
OT
‐
HWS
S
‐
FT
‐
HWS
P
‐
SYS
S
‐
FT
‐
MC
TS
‐
HWS
DHW
ret
P
‐
DHW
*Opentherm1
or
SL1,
Opentherm2
or
SL2
Boiler
CT
Pump
Circuit
CT
Pump
Circuit
S
‐
M
‐
HWS
S
‐
B
‐
HWS
P
‐
MC
Alternative
DHW
ret
P
‐
HWS
P
‐
DHW
CWS
in
Direct
HWS
Extension
module
with
Mixing
control
to
Plate
Heat
Exchanger
for
Direct
DHW
with
pump
V
‐
MC
S
‐
OT
‐
HWS
S
‐
FT
‐
HWS
S
‐
FT
‐
MC
DHW
out
DHW
ret
P
‐
DHW
P
‐
MC
CWS
in
Direct
DHW
Extension
module
with
Primary
Buffer
Mixing
control
to
Plate
Heat
Exchanger
for
Direct
DHW
with
pump
V
‐
MC
S
‐
OT
‐
HWS
S
‐
FT
‐
HWS
S
‐
FT
‐
MC
DHW
out
DHW
ret
S
‐
PB
P
‐
DHW
P
‐
MC
CWS
in
Direct
DHW
with
Primary
Buffer
VariCAN
Adapter B1..Bn..EMn
VariCAN
Adapter
B1..Bn..EMn
DI1
Ext.
Timer/
Enable
or
Holiday
DI3
Ext.
Timer/
Enable
or
Holiday
VariCAN
Adapter B1..Bn..EMn
Bn
Connections
DI3
Ext.
Timer/
Enable
or
Holiday
VariCAN
Adapter B1..Bn..EMn
DI1
Ext.
Timer
or
Enable
S
‐
PB
S1
Override
or
Pump
Flt
DI2
S
‐
ST
‐
HWS2
S4
TS
‐
HWS1
DI1
S
‐
OT
‐
HWS
S3
S
‐
ST
‐
HWS1
S1
DI3
TS
‐
HWS2
DI1
Ext.
Timer/
Enable
or
Holiday
DI2
Override
or
Pump
Flt
S4
S
‐
HWS
DI3
TS
‐
HWS
DI4
Override
or
Pump
Flt
VF4
PP
‐
HWS
S1
S
‐
RT
‐
PC
VF5
SP
‐
HWS
S2
S
‐
FT
‐
PC
OT1
RT
‐
PC,
T
‐
HWS
S3
S
‐
OT
‐
PC
DI4
Override
or
Pump
Flt
VariCAN
Adapter B1..Bn..EMn
Bn
Connections
Inputs
Outputs
VF1
P
‐
PC
OT2
RT
‐
HC2
S4
S
‐
RT
‐
HC2
S5
S
‐
FT
‐
HC2
S6
S
‐
OT
‐
HC2
DI3
Ext.
Timer/
Enable
or
Holiday
S
‐
FT
‐
HC1
VF4
P
‐
HC2
S3
S
‐
OT
‐
HC1
VF5
AH
‐
HC2
DI1
Ext.
Timer/
Enable
or
Holiday
DI2
Override
or
Pump
Flt
VariCAN
Adapter B1..Bn..EMn
DI3
TS
‐
HWS
Bn
Connections
Inputs
Outputs
OT1
RT
‐
HC1
VF1
P
‐
HC1
S1
S
‐
RT
‐
HC1
VF2
AH
‐
HC1
DI4
Override
or
Pump
Flt
DI2
Override
or
Pump
Flt
S4
S
‐
HWS
Inputs
Outputs
VF1
P
‐
MC
S1
S
‐
RT
‐
MC
VF2
V
‐
MC
open
S2
S
‐
FT
‐
MC
VF3
V
‐
MC
close
S3
S
‐
OT
‐
MC
VF4
PP
‐
HWS
Ext.
Timer/
Enable
or
Holiday
VF5
S4
S
‐
RT
‐
HC
S5
S
‐
FT
‐
HC
S6
S
‐
OT
‐
HC
DI3
Ext.
Timer/
Enable
or
Holiday
S1
S
‐
RT
‐
MC
VF2
V
‐
MC
open
S2
S
‐
FT
‐
MC
VF3
V
‐
MC
close
S3
S
‐
OT
‐
MC
VF4
P
‐
HC
DI1
Ext.
Timer/
Enable
or
Holiday
VF5
AH
‐
HC
DI4
Override
or
Pump
Flt
VariCAN
Adapter B1..Bn..EMn
Bn
Connections
Inputs
Outputs
OT1
RT
‐
MC
VF1
P
‐
MC
OT2
RT
‐
PC
S4
S
‐
RT
‐
PC
S5
S
‐
FT
‐
PC
S6
S
‐
OT
‐
PC
DI3
Ext.
Timer/
Enable
or
Holiday
S3
S
‐
OT
‐
MC
VF4
P
‐
PC
DI1
Ext.
Timer/
Enable
or
Holiday
DI2
Override
or
Pump
Flt
Opentherm2
RT
‐
PC2
Opentherm2
RT
‐
PC2
SL1
VariCAN
Adapter
B1..Bn
SL2
or
Enable
or
Override
Bn
Connections
DI1
Ext.
Timer/
Enable
or
Holiday
P1
(0
‐
10V)
V
‐
CT1
Boiler
Connections
Inputs
Outputs
Opentherm1
RT
‐
PC1
Boiler
run
Room
S
‐
RT
‐
PC1
Room
S
‐
RT
‐
CT2
or
P2
SL1
RT
‐
CT1
P1
(0
‐
10V)
V
‐
CT1
SL2
RT
‐
CT2
or
P2
P3
V
‐
CT2
Tank
S
‐
RT
‐
CT2
or
P2
SL1
RT
‐
CT1
P3
V
‐
HWS
SL2
TS
‐
HWS
or
P2
Boiler
Connections
Inputs
Outputs
Opentherm
RT
‐
PC1
Boiler
run
Room
S
‐
RT
‐
PC1 Boiler
fault
Outside
S
‐
OT
P1
(0
‐
10V)
P
‐
SYS
Boiler
fault
Outside
S
‐
OT
P1
(0
‐
10V)
P
‐
SYS
Room
S
‐
RT
‐
PC2
Boiler
Connections
Inputs
Outputs
Opentherm1
RT
‐
PC1
Boiler
run
Room
S
‐
RT
‐
PC1
Boiler
fault
Outside
S
‐
OT
P1
(0
‐
10V)
P
‐
PC1
or
P2
SL1
RT
‐
PC1
P3
P
‐
PC2
SL2
RT
‐
PC2
P
‐
HWSC
SL2
Outside
S
‐
OT
P1
(0
‐
10V)
P
‐
PC
Tank
S
‐
HWS
or
P2
SL1
RT
‐
PC
TS
‐
HWS
P3
Bn
Connections
Inputs
Outputs
S2
S
‐
FT
‐
MC
VF2
V
‐
MC
open
S2
S
‐
FT
‐
MC
VF3
V
‐
MC
close
S6
S
‐
FT
‐
DHW
S7
SP
‐
HWS
VF5
P
‐
DHW
P
‐
MC
VF1
DI2
Override
or
Pump
Flt
DI2
Override
or
Pump
Flt
Inputs
Outputs
S2
S
‐
FT
‐
MC
VF1
P
‐
MC
S2
S
‐
FT
‐
MC
VF2
V
‐
MC
open
S6
S
‐
FT
‐
DHW
VF3
V
‐
MC
close
S7
SP
‐
HWS
VF5
VariCAN
Adapter B1..Bn..EMn
P
‐
DHW
S6
S
‐
FT
‐
DHW
S7
SP
‐
HWS
DI1
TS
‐
HWS
DI2
Override
or
Pump
Flt
S3
S
‐
FT
‐
HWS
VF3
V
‐
MC
close
S5
S
‐
B
‐
HWS
VF4
P
‐
HWS
S6
S
‐
FT
‐
DHW
VF5
P
‐
DHW
Inputs
Outputs
S1
S
‐
M
‐
HWS
VF1
P
‐
MC
S2
S
‐
FT
‐
MC
VF2
V
‐
MC
open
Bn
Connections
Inputs
Outputs
S1
S
‐
M
‐
HWS
VF1
P
‐
MC
S2
S
‐
FT
‐
MC
VF2
V
‐
MC
open
DI1
TS
‐
HWS
VF3
V
‐
MC
close
VF4
P
‐
HWS
DI2
Override
or
Pump
Flt
S7
SP
‐
HWS
S3
S
‐
FT
‐
HWS
S5
S
‐
B
‐
HWS
Bn
Connections
B1..Bn..EMn
VariCAN
Adapter
Override
or
Pump
Flt
DI4
VF4
PP
‐
HWS2
VF5
SP
‐
HWS2
Bn
Connections
Inputs
Outputs
VF1
PP
‐
HWS1
VF2
SP
‐
HWS1
VariCAN
Adapter
B1..Bn..EMn
Header
S
‐
FT
Outside
S
‐
OT
P3
V
‐
DHW
S2
SL2
SL1
DI1
Boiler
Connections
Inputs
Outputs
Opentherm
RT
‐
PC
Boiler
run
Room
S
‐
RT
‐
SC
Boiler
fault
SP
‐
HWS
DI4
Override
or
Pump
Flt
VariCAN
Adapter B1..Bn..EMn
Bn
Connections
OT1
RT
‐
MC,
T
‐
HWS
DI2
Override
or
Pump
Flt
VariCAN
Adapter B1..Bn..EMn
DI2
Override
or
Pump
Flt
OT2
RT
‐
HC
OT1
RT
‐
MC1
S1
S
‐
RT
‐
MC1
VariCAN
Adapter B1..Bn..EMn
Override
or
Pump
Flt
DI4
S6
S
‐
OT
‐
MC2
Bn
Connections
Inputs
Outputs
OT1
RT
‐
MC
VF1
P
‐
MC
S1
S
‐
RT
‐
MC
VF2
V
‐
MC
open
S2
S
‐
FT
‐
MC
VF3
V
‐
MC
close
VF6
V
‐
MC2
close
OT2
RT
‐
MC2
Override
or
Pump
Flt
DI2
DI1
Ext.
Timer/
Enable
or
Holiday
S
‐
RT
‐
MC2
S4
DI3
Ext.
Timer/
Enable
or
Holiday
S5
S
‐
FT
‐
MC2
S2
S
‐
FT
‐
MC1
VF3
V
‐
MC1
close
S3
S
‐
OT
‐
MC1
VF4
P
‐
MC2
VF5
V
‐
MC2
open
Bn
Connections
Inputs
Outputs
VF1
P
‐
MC1
VF2
V
‐
MC1
open
V
‐
MC
close
S3
S
‐
OT
‐
MC1
Bn
Connections
Inputs
Outputs
VF1
P
‐
MC
VF2
V
‐
MC
open
OT1
RT
‐
MC
VF3
S1
S
‐
RT
‐
MC
S2
S
‐
FT
‐
MC
Tank
S
‐
HWS
P1
(0
‐
10V)
P
‐
B
or
P2
B1..Bn
B1
Connections
Inputs
Outputs
Ext.Timer
or
Enable
or
Override
TS
‐
HWS
VariCAN
Adapter
Opentherm
RT
‐
SC
Boiler
run
Room
S
‐
RT
‐
SC
Boiler
fault
or
P2
or
Enable
or
Enable
Boiler
fault
Header
S
‐
FT
P1
(0
‐
10V)
Bn
Connections
Inputs
Outputs
Boiler
run
Boiler
fault
P1
(0
‐
10V)
P
‐
B
or
P2
Header
B1
Connections
Inputs
Outputs
Opentherm
VariCAN
Adapter
B1..Bn
RT
‐
SC
Boiler
run
Room
S
‐
RT
‐
SC
Boiler
fault
S
‐
FT
P1
(0
‐
10V)
SL1
Ext.Timer P1
(0
‐
10V)
Outside
S
‐
OT
or
P3
SL1
Ext.Timer
P2
B
‐
V
or
Enable
or
Override
VariCAN
Adapter
B1..Bn
P
‐
SC
Header
S
‐
FT
P1
(0
‐
10V)
or
P2
or
Override
VariCAN
Adapter
Outside
S
‐
OT
P
‐
B
P
‐
B
P1
(0
‐
10V)
P
‐
B
P
‐
B
or
Override
Outside
S
‐
OT
Ext.Timer
or
Enable
or
P2
B1
Connections
Inputs
Opentherm
RT
‐
SC
Room
S
‐
RT
‐
SC
Header
S
‐
FT
Outputs
Boiler
run
Boiler
fault
P1
(0
‐
10V)
SL1
Room
S
‐
RT
‐
SC
Boiler
fault
B1
Connections
Inputs
Outputs
Opentherm
RT
‐
SC
Boiler
run
P
‐
SC
B1..Bn
or
Enable
B1
Connections
Inputs
Outputs
Opentherm
RT
‐
SC
Boiler
run
Room
S
‐
RT
‐
SC
or
Override
P
‐
HWSC
VariCAN
Adapter
B1..Bn
Outside
S
‐
OT
or
P2
SL1
Ext.Timer
Tank
S
‐
HWS
Outside
S
‐
OT
Opentherm
RT
‐
SC
Boiler
run
Room
S
‐
RT
‐
SC
VariCAN
Adapter
B1..Bn
P
‐
PC
or
P2
or
Override
Tank
S
‐
RT
‐
PC
P1
(0
‐
10V)
SL1
Ext.Timer
or
P2
Header
S
‐
FT
P3
B1
Connections
Inputs
Outputs
SL2
TS
‐
HWS
Boiler
fault
VariCAN
Adapter
B1..Bn
Bn
Connections
Inputs
Outputs
VariCAN
Adapter
B1..Bn
Boiler
run
Boiler
fault
P
‐
B
or
P2
P1
(0
‐
10V)
or
P2
Ext.Timer
or
Enable
Opentherm
RT
‐
PC
Room
S
‐
RT
‐
PC
P
‐
PC
or
Override
P1
(0
‐
10V)
Inputs
Outputs
Opentherm
RT
‐
PC
Boiler
run
Room
S
‐
RT
‐
PC
Boiler
fault
VariCAN
Adapter
B1..Bn
P1
(0
‐
10V)
P
‐
B
or
P2
or
Enable P1
(0
‐
10V)
P
‐
PC
or
Override
or
P2
SL2
TS
‐
HWS
P3
P
‐
HWSC
Tank
S
‐
HWS
Ext.Timer
SL1
Bn
Connections
Inputs
Outputs
Opentherm
RT
‐
PC
Boiler
run
P
‐
PC1
or
Override
or
P2
Ext.Timer
P3
P
‐
PC2
Room
S
‐
RT
‐
PC1 Boiler
fault
Room
S
‐
RT
‐
PC2
P1
(0
‐
10V)
P
‐
B
SL1
Ext.Timer
or
P2
or
Enable P1
(0
‐
10V)
A.
KM821
‐
I5,
System
Manager
and
TTL
‐
VariCAN
adapter
only
Boiler
1,
Master
configuration
options
Boiler
n,
Slave
configuration
options
Extension
Module
configuration
options
Sequence
control
1
‐
16
boilers
Sequence
control
1
‐
16
boilers,
Boiler
n
Extension
module
with
1
x
Mixing
circuit
S
‐
FT
RT
‐
SC
RT
‐
MC
S
‐
RT
‐
SC
S
‐
RT
‐
MC
S
‐
OT
B1
Bn
Bn
S
‐
OT
‐
MC
V
‐
MC
P
‐
MC
S
‐
FT
‐
MC
P
‐
B
P
‐
B
P
‐
B
*SL1
is
Plant
control
*OT1
or
RT
‐
MC
Sequence
control
Sequence
control,
Boiler
n
Heating
circuit,
Mixing
Sequence
control
1
‐
16
boilers
with
Mixing
header
and
System
pump
Sequence
control
1
‐
16
boilers,
Boiler
n
with
CT
Pump
circuit
Extension
module
with
2
x
Mixing
circuits
S
‐
FT
P
‐
SC
RT
‐
SC
S
‐
RT
‐
PC
RT
‐
PC
RT
‐
MC1
RT
‐
MC2
S
‐
RT
‐
SC
S
‐
RT
‐
MC1
S
‐
RT
‐
MC2
S
‐
OT
B1
Bn
S
‐
OT
‐
PC
Bn
P
‐
PC
S
‐
OT
‐
MC1
V
‐
MC1
S
‐
OT
‐
MC2
V
‐
MC2
P
‐
MC1
P
‐
MC2
S
‐
FT
‐
MC1
S
‐
FT
‐
MC2
P
‐
B
P
‐
B
P
‐
B
*SL1
is
Plant
control
*Opentherm
or
SL1
Sequence
control
Sequence
control,
Boiler
n
CT
Pump
Circuit
SL1
is
Heating
Circuit
control
Heating
circuit,
Mixing
circuit
1
Heating
circuit,
Mixing
circuit
2
Sequence
control
1
‐
16
boilers
with
Indirect
Hot
Water
Storage
Tank
Sequence
control
1
‐
16
boilers,
Boiler
n
with
CT
Pump
circuit
and
Indirect
HWS
circuit
Extension
module
with
1
x
Mixing
circuit
and
1
x
CT
Pumped
circuit
S
‐
FT
RT
‐
SC,
T
‐
HWS
S
‐
RT
‐
PC
RT
‐
PC,
T
‐
HWS
RT
‐
MC
S
‐
RT
‐
PC
RT
‐
PC
S
‐
RT
‐
SC
S
‐
RT
‐
MC
S
‐
OT
B1
Bn
P
‐
HWSC
S
‐
OT
‐
PC
Bn
P
‐
PC
P
‐
HWSC
S
‐
OT
‐
MC
V
‐
MC
S
‐
OT
‐
PC
P
‐
PC
S
‐
FT
‐
PC
TS
‐
HWS
TS
‐
HWS
P
‐
MC
S
‐
HWS
S
‐
HWS
S
‐
FT
‐
MC
P
‐
B
P
‐
B
P
‐
B
*SL1
is
Plant
control
*Opentherm
or
SL1
Sequence
control
Hot
Water
Storage
SL2
or
(SL2
and
T
‐
HWS:Opentherm
DHW
bit)
Sequence
control,
Boiler
n
CT
Pump
Circuit
Hot
Water
Storage
SL1
is
Heating
Circuit
control
Heating
circuit,
Mixing
CT
Pump
Circuit
SL2
or
(SL2
and
T
‐
HWS:Opentherm
DHW
bit)
Sequence
control
1
‐
16
boilers
with
a
CT
Pump
circuit
Sequence
control
1
‐
16
boilers,
Boiler
n
with
2
x
CT
Pump
circuit
Extension
module
with
1
x
Mixing
circuit
and
1
x
Air
Handler
circuit
S
‐
FT
S
‐
RT
‐
PC
RT
‐
SC
S
‐
FT
S
‐
RT
‐
PC1
S
‐
RT
‐
PC2
RT
‐
PCn
RT
‐
MC
S
‐
RT
‐
HC
RT
‐
HC
S
‐
RT
‐
SC
S
‐
RT
‐
SC
S
‐
RT
‐
MC
S
‐
OT
B1
Bn
P
‐
PC
S
‐
OT
‐
PC
Bn
P
‐
PC1
P
‐
PC2
S
‐
OT
‐
MC
V
‐
MC
S
‐
OT
‐
HC
P
‐
HC
S
‐
FT
‐
HC
P
‐
MC
AH
‐
HC
S
‐
FT
‐
MC
P
‐
B
P
‐
B
P
‐
B
*SL1
is
Plant
control
*Opentherm1
or
SL1,
Opentherm2
or
SL2
Sequence
control
CT
Pump
Circuit
Sequence
control,
Boiler
n
CT
Pump
Circuit
1
CT
Pump
Circuit
2
SL1
is
Heating
Circuit
control
Heating
circuit,
Mixing
Heater
Circuit
SL2
is
Heating
Circuit
control
Sequence
control
1
‐
16
boilers
with
Common
pump
and
optional
valves
Extension
module
with
1
x
Mixing
circuit
and
1
x
HWS
circuit
S
‐
FT
RT
‐
SC
RT
‐
MC,
T
‐
HWS
S
‐
RT
‐
SC
S
‐
RT
‐
MC
S
‐
OT
B1
Bn
S
‐
OT
‐
MC
V
‐
MC
PP
‐
HWS
SP
‐
HWS
P
‐
MC
TS
‐
HWS
S
‐
FT
‐
MC
S
‐
ST
‐
HWS
V
‐
B
V
‐
B
P
‐
SC
*SL1
is
Plant
control
Sequence
control
Heating
circuit,
Mixing
Hot
Water
Storage
Sequence
control
1
‐
16
boilers,
with
local
DHW
demand
Extension
module
with
2
x
Air
Handler
circuit
V
‐
DHW
S
‐
FT
RT
‐
SC
S
‐
RT
‐
HC1
RT
‐
HC1
S
‐
RT
‐
HC2
RT
‐
HC2
S
‐
RT
‐
SC
S
‐
OT
‐
HC1
P
‐
HC1
S
‐
OT
‐
HC2
P
‐
HC2
S
‐
OT
B1
Bn
S
‐
FT
‐
HC1
S
‐
FT
‐
HC2
TS
‐
HWS
AH
‐
HC1
AH
‐
HC2
S
‐
HWS
P
‐
B
P
‐
B
Heater
Circuit
Heater
Circuit
*SL1
is
Plant
control
Sequence
control
Extension
module
with
1
x
CT
pumped
circuit
and
1
x
HWS
circuit
Single
Boiler
with
a
CT
Pump
circuit
and
DHW
tank
S
‐
RT
‐
PC
RT
‐
MC,
T
‐
HWS
S
‐
RT
‐
PC
RT
‐
PC,
T
‐
HWS
S
‐
OT
‐
PC
P
‐
PC
PP
‐
HWS
SP
‐
HWS
S
‐
OT
P
‐
PC
P
‐
HWSC
S
‐
FT
‐
PC
TS
‐
HWS
TS
‐
HWS
S
‐
ST
‐
HWS
S
‐
HWS
CT
Pump
Circuit
Hot
Water
Storage
*Opentherm
or
SL1
Boiler
CT
Pump
Circuit
Hot
Water
Storage
SL2
or
(SL2
and
T
‐
HWS:Opentherm
DHW
bit)
Extension
module
with
1
x
CT
pumped
circuit
and
1
x
HWS
circuit
Single
Boiler
with
2
x
CT
Pump
circuits
S
‐
RT
‐
PC1
RT
‐
PC1
S
‐
RT
‐
PC2
RT
‐
PC2
S
‐
OT
‐
HWS
PP
‐
HWS1
PP
‐
HWS2
SP
‐
HWS1
SP
‐
HWS2
S
‐
OT
P
‐
PC1
P
‐
PC2
TS
‐
HWS1
TS
‐
HWS2
S
‐
ST
‐
HWS1
S
‐
ST
‐
HWS2
Hot
Water
Storage
Hot
Water
Storage
*Opentherm1
or
SL1,
Opentherm2
or
SL2
Boiler
CT
Pump
Circuit
CT
Pump
Circuit
Extension
module
with
Mixing
control
to
Plate
Heat
Exchanger
for
Direct
HWS
Single
Boiler
with
CT
and
HWS
Zone
circuits
S
‐
DHW
SP
‐
HWS
DHW
out
S
‐
RT
‐
PC1
RT
‐
PC1,
TS
‐
HWS
V
‐
MC
S
‐
OT
‐
HWS
S
‐
OT
S
‐
FT
‐
HWS
V
‐
CT
V
‐
HWS
S
‐
FT
‐
MC
TS
‐
HWS
TS
‐
HWS
S
‐
M
‐
HWS
S
‐
HWS
S
‐
B
‐
HWS
P
‐
SYS
*Opentherm
or
SL1
P
‐
MC
Boiler
CT
Pump
Circuit
Hot
Water
Storage
SL2
or
(SL2
and
T
‐
HWS:Opentherm
DHW
bit)
P
‐
HWS
CWS
in
Single
Boiler
with
2
x
CT
Zone
circuits
Direct
HWS
S
‐
RT
‐
CT1
RT
‐
PC1
S
‐
RT
‐
CT2
RT
‐
PC2
Extension
module
with
Mixing
control
to
Plate
Heat
Exchanger
for
Direct
HWS
with
DHW
pump
S
‐
OT
V
‐
CT1
V
‐
CT2
S
‐
DHW
SP
‐
HWS
DHW
out
V
‐
MC
S
‐
OT
‐
HWS
S
‐
FT
‐
HWS
P
‐
SYS
S
‐
FT
‐
MC
TS
‐
HWS
DHW
ret
P
‐
DHW
*Opentherm1
or
SL1,
Opentherm2
or
SL2
Boiler
CT
Pump
Circuit
CT
Pump
Circuit
S
‐
M
‐
HWS
S
‐
B
‐
HWS
P
‐
MC
Alternative
DHW
ret
P
‐
HWS
P
‐
DHW
CWS
in
Direct
HWS
Extension
module
with
Mixing
control
to
Plate
Heat
Exchanger
for
Direct
DHW
with
pump
V
‐
MC
S
‐
OT
‐
HWS
S
‐
FT
‐
HWS
S
‐
FT
‐
MC
DHW
out
DHW
ret
P
‐
DHW
P
‐
MC
CWS
in
Direct
DHW
Extension
module
with
Primary
Buffer
Mixing
control
to
Plate
Heat
Exchanger
for
Direct
DHW
with
pump
V
‐
MC
S
‐
OT
‐
HWS
S
‐
FT
‐
HWS
S
‐
FT
‐
MC
DHW
out
DHW
ret
S
‐
PB
P
‐
DHW
P
‐
MC
CWS
in
Direct
DHW
with
Primary
Buffer
VariCAN
Adapter B1..Bn..EMn
VariCAN
Adapter
B1..Bn..EMn
DI1
Ext.
Timer/
Enable
or
Holiday
DI3
Ext.
Timer/
Enable
or
Holiday
VariCAN
Adapter B1..Bn..EMn
Bn
Connections
DI3
Ext.
Timer/
Enable
or
Holiday
VariCAN
Adapter B1..Bn..EMn
DI1
Ext.
Timer
or
Enable
S
‐
PB
S1
Override
or
Pump
Flt
DI2
S
‐
ST
‐
HWS2
S4
TS
‐
HWS1
DI1
S
‐
OT
‐
HWS
S3
S
‐
ST
‐
HWS1
S1
DI3
TS
‐
HWS2
DI1
Ext.
Timer/
Enable
or
Holiday
DI2
Override
or
Pump
Flt
S4
S
‐
HWS
DI3
TS
‐
HWS
DI4
Override
or
Pump
Flt
VF4
PP
‐
HWS
S1
S
‐
RT
‐
PC
VF5
SP
‐
HWS
S2
S
‐
FT
‐
PC
OT1
RT
‐
PC,
T
‐
HWS
S3
S
‐
OT
‐
PC
DI4
Override
or
Pump
Flt
VariCAN
Adapter B1..Bn..EMn
Bn
Connections
Inputs
Outputs
VF1
P
‐
PC
OT2
RT
‐
HC2
S4
S
‐
RT
‐
HC2
S5
S
‐
FT
‐
HC2
S6
S
‐
OT
‐
HC2
DI3
Ext.
Timer/
Enable
or
Holiday
S
‐
FT
‐
HC1
VF4
P
‐
HC2
S3
S
‐
OT
‐
HC1
VF5
AH
‐
HC2
DI1
Ext.
Timer/
Enable
or
Holiday
DI2
Override
or
Pump
Flt
VariCAN
Adapter B1..Bn..EMn
DI3
TS
‐
HWS
Bn
Connections
Inputs
Outputs
OT1
RT
‐
HC1
VF1
P
‐
HC1
S1
S
‐
RT
‐
HC1
VF2
AH
‐
HC1
DI4
Override
or
Pump
Flt
DI2
Override
or
Pump
Flt
S4
S
‐
HWS
Inputs
Outputs
VF1
P
‐
MC
S1
S
‐
RT
‐
MC
VF2
V
‐
MC
open
S2
S
‐
FT
‐
MC
VF3
V
‐
MC
close
S3
S
‐
OT
‐
MC
VF4
PP
‐
HWS
Ext.
Timer/
Enable
or
Holiday
VF5
S4
S
‐
RT
‐
HC
S5
S
‐
FT
‐
HC
S6
S
‐
OT
‐
HC
DI3
Ext.
Timer/
Enable
or
Holiday
S1
S
‐
RT
‐
MC
VF2
V
‐
MC
open
S2
S
‐
FT
‐
MC
VF3
V
‐
MC
close
S3
S
‐
OT
‐
MC
VF4
P
‐
HC
DI1
Ext.
Timer/
Enable
or
Holiday
VF5
AH
‐
HC
DI4
Override
or
Pump
Flt
VariCAN
Adapter B1..Bn..EMn
Bn
Connections
Inputs
Outputs
OT1
RT
‐
MC
VF1
P
‐
MC
OT2
RT
‐
PC
S4
S
‐
RT
‐
PC
S5
S
‐
FT
‐
PC
S6
S
‐
OT
‐
PC
DI3
Ext.
Timer/
Enable
or
Holiday
S3
S
‐
OT
‐
MC
VF4
P
‐
PC
DI1
Ext.
Timer/
Enable
or
Holiday
DI2
Override
or
Pump
Flt
Opentherm2
RT
‐
PC2
Opentherm2
RT
‐
PC2
SL1
VariCAN
Adapter
B1..Bn
SL2
or
Enable
or
Override
Bn
Connections
DI1
Ext.
Timer/
Enable
or
Holiday
P1
(0
‐
10V)
V
‐
CT1
Boiler
Connections
Inputs
Outputs
Opentherm1
RT
‐
PC1
Boiler
run
Room
S
‐
RT
‐
PC1
Room
S
‐
RT
‐
CT2
or
P2
SL1
RT
‐
CT1
P1
(0
‐
10V)
V
‐
CT1
SL2
RT
‐
CT2
or
P2
P3
V
‐
CT2
Tank
S
‐
RT
‐
CT2
or
P2
SL1
RT
‐
CT1
P3
V
‐
HWS
SL2
TS
‐
HWS
or
P2
Boiler
Connections
Inputs
Outputs
Opentherm
RT
‐
PC1
Boiler
run
Room
S
‐
RT
‐
PC1 Boiler
fault
Outside
S
‐
OT
P1
(0
‐
10V)
P
‐
SYS
Boiler
fault
Outside
S
‐
OT
P1
(0
‐
10V)
P
‐
SYS
Room
S
‐
RT
‐
PC2
Boiler
Connections
Inputs
Outputs
Opentherm1
RT
‐
PC1
Boiler
run
Room
S
‐
RT
‐
PC1
Boiler
fault
Outside
S
‐
OT
P1
(0
‐
10V)
P
‐
PC1
or
P2
SL1
RT
‐
PC1
P3
P
‐
PC2
SL2
RT
‐
PC2
P
‐
HWSC
SL2
Outside
S
‐
OT
P1
(0
‐
10V)
P
‐
PC
Tank
S
‐
HWS
or
P2
SL1
RT
‐
PC
TS
‐
HWS
P3
Bn
Connections
Inputs
Outputs
S2
S
‐
FT
‐
MC
VF2
V
‐
MC
open
S2
S
‐
FT
‐
MC
VF3
V
‐
MC
close
S6
S
‐
FT
‐
DHW
S7
SP
‐
HWS
VF5
P
‐
DHW
P
‐
MC
VF1
DI2
Override
or
Pump
Flt
DI2
Override
or
Pump
Flt
Inputs
Outputs
S2
S
‐
FT
‐
MC
VF1
P
‐
MC
S2
S
‐
FT
‐
MC
VF2
V
‐
MC
open
S6
S
‐
FT
‐
DHW
VF3
V
‐
MC
close
S7
SP
‐
HWS
VF5
VariCAN
Adapter B1..Bn..EMn
P
‐
DHW
S6
S
‐
FT
‐
DHW
S7
SP
‐
HWS
DI1
TS
‐
HWS
DI2
Override
or
Pump
Flt
S3
S
‐
FT
‐
HWS
VF3
V
‐
MC
close
S5
S
‐
B
‐
HWS
VF4
P
‐
HWS
S6
S
‐
FT
‐
DHW
VF5
P
‐
DHW
Inputs
Outputs
S1
S
‐
M
‐
HWS
VF1
P
‐
MC
S2
S
‐
FT
‐
MC
VF2
V
‐
MC
open
Bn
Connections
Inputs
Outputs
S1
S
‐
M
‐
HWS
VF1
P
‐
MC
S2
S
‐
FT
‐
MC
VF2
V
‐
MC
open
DI1
TS
‐
HWS
VF3
V
‐
MC
close
VF4
P
‐
HWS
DI2
Override
or
Pump
Flt
S7
SP
‐
HWS
S3
S
‐
FT
‐
HWS
S5
S
‐
B
‐
HWS
Bn
Connections
B1..Bn..EMn
VariCAN
Adapter
Override
or
Pump
Flt
DI4
VF4
PP
‐
HWS2
VF5
SP
‐
HWS2
Bn
Connections
Inputs
Outputs
VF1
PP
‐
HWS1
VF2
SP
‐
HWS1
VariCAN
Adapter
B1..Bn..EMn
Header
S
‐
FT
Outside
S
‐
OT
P3
V
‐
DHW
S2
SL2
SL1
DI1
Boiler
Connections
Inputs
Outputs
Opentherm
RT
‐
PC
Boiler
run
Room
S
‐
RT
‐
SC
Boiler
fault
SP
‐
HWS
DI4
Override
or
Pump
Flt
VariCAN
Adapter B1..Bn..EMn
Bn
Connections
OT1
RT
‐
MC,
T
‐
HWS
DI2
Override
or
Pump
Flt
VariCAN
Adapter B1..Bn..EMn
DI2
Override
or
Pump
Flt
OT2
RT
‐
HC
OT1
RT
‐
MC1
S1
S
‐
RT
‐
MC1
VariCAN
Adapter B1..Bn..EMn
Override
or
Pump
Flt
DI4
S6
S
‐
OT
‐
MC2
Bn
Connections
Inputs
Outputs
OT1
RT
‐
MC
VF1
P
‐
MC
S1
S
‐
RT
‐
MC
VF2
V
‐
MC
open
S2
S
‐
FT
‐
MC
VF3
V
‐
MC
close
VF6
V
‐
MC2
close
OT2
RT
‐
MC2
Override
or
Pump
Flt
DI2
DI1
Ext.
Timer/
Enable
or
Holiday
S
‐
RT
‐
MC2
S4
DI3
Ext.
Timer/
Enable
or
Holiday
S5
S
‐
FT
‐
MC2
S2
S
‐
FT
‐
MC1
VF3
V
‐
MC1
close
S3
S
‐
OT
‐
MC1
VF4
P
‐
MC2
VF5
V
‐
MC2
open
Bn
Connections
Inputs
Outputs
VF1
P
‐
MC1
VF2
V
‐
MC1
open
V
‐
MC
close
S3
S
‐
OT
‐
MC1
Bn
Connections
Inputs
Outputs
VF1
P
‐
MC
VF2
V
‐
MC
open
OT1
RT
‐
MC
VF3
S1
S
‐
RT
‐
MC
S2
S
‐
FT
‐
MC
Tank
S
‐
HWS
P1
(0
‐
10V)
P
‐
B
or
P2
B1..Bn
B1
Connections
Inputs
Outputs
Ext.Timer
or
Enable
or
Override
TS
‐
HWS
VariCAN
Adapter
Opentherm
RT
‐
SC
Boiler
run
Room
S
‐
RT
‐
SC
Boiler
fault
or
P2
or
Enable
or
Enable
Boiler
fault
Header
S
‐
FT
P1
(0
‐
10V)
Bn
Connections
Inputs
Outputs
Boiler
run
Boiler
fault
P1
(0
‐
10V)
P
‐
B
or
P2
Header
B1
Connections
Inputs
Outputs
Opentherm
VariCAN
Adapter
B1..Bn
RT
‐
SC
Boiler
run
Room
S
‐
RT
‐
SC
Boiler
fault
S
‐
FT
P1
(0
‐
10V)
SL1
Ext.Timer P1
(0
‐
10V)
Outside
S
‐
OT
or
P3
SL1
Ext.Timer
P2
B
‐
V
or
Enable
or
Override
VariCAN
Adapter
B1..Bn
P
‐
SC
Header
S
‐
FT
P1
(0
‐
10V)
or
P2
or
Override
VariCAN
Adapter
Outside
S
‐
OT
P
‐
B
P
‐
B
P1
(0
‐
10V)
P
‐
B
P
‐
B
or
Override
Outside
S
‐
OT
Ext.Timer
or
Enable
or
P2
B1
Connections
Inputs
Opentherm
RT
‐
SC
Room
S
‐
RT
‐
SC
Header
S
‐
FT
Outputs
Boiler
run
Boiler
fault
P1
(0
‐
10V)
SL1
Room
S
‐
RT
‐
SC
Boiler
fault
B1
Connections
Inputs
Outputs
Opentherm
RT
‐
SC
Boiler
run
P
‐
SC
B1..Bn
or
Enable
B1
Connections
Inputs
Outputs
Opentherm
RT
‐
SC
Boiler
run
Room
S
‐
RT
‐
SC
or
Override
P
‐
HWSC
VariCAN
Adapter
B1..Bn
Outside
S
‐
OT
or
P2
SL1
Ext.Timer
Tank
S
‐
HWS
Outside
S
‐
OT
Opentherm
RT
‐
SC
Boiler
run
Room
S
‐
RT
‐
SC
VariCAN
Adapter
B1..Bn
P
‐
PC
or
P2
or
Override
Tank
S
‐
RT
‐
PC
P1
(0
‐
10V)
SL1
Ext.Timer
or
P2
Header
S
‐
FT
P3
B1
Connections
Inputs
Outputs
SL2
TS
‐
HWS
Boiler
fault
VariCAN
Adapter
B1..Bn
Bn
Connections
Inputs
Outputs
VariCAN
Adapter
B1..Bn
Boiler
run
Boiler
fault
P
‐
B
or
P2
P1
(0
‐
10V)
or
P2
Ext.Timer
or
Enable
Opentherm
RT
‐
PC
Room
S
‐
RT
‐
PC
P
‐
PC
or
Override
P1
(0
‐
10V)
Inputs
Outputs
Opentherm
RT
‐
PC
Boiler
run
Room
S
‐
RT
‐
PC
Boiler
fault
VariCAN
Adapter
B1..Bn
P1
(0
‐
10V)
P
‐
B
or
P2
or
Enable P1
(0
‐
10V)
P
‐
PC
or
Override
or
P2
SL2
TS
‐
HWS
P3
P
‐
HWSC
Tank
S
‐
HWS
Ext.Timer
SL1
Bn
Connections
Inputs
Outputs
Opentherm
RT
‐
PC
Boiler
run
P
‐
PC1
or
Override
or
P2
Ext.Timer
P3
P
‐
PC2
Room
S
‐
RT
‐
PC1 Boiler
fault
Room
S
‐
RT
‐
PC2
P1
(0
‐
10V)
P
‐
B
SL1
Ext.Timer
or
P2
or
Enable P1
(0
‐
10V)
A.
KM821
‐
I5,
System
Manager
and
TTL
‐
VariCAN
adapter
only
Boiler
1,
Master
configuration
options
Boiler
n,
Slave
configuration
options
Extension
Module
configuration
options
Sequence
control
1
‐
16
boilers
Sequence
control
1
‐
16
boilers,
Boiler
n
Extension
module
with
1
x
Mixing
circuit
S
‐
FT
RT
‐
SC
RT
‐
MC
S
‐
RT
‐
SC
S
‐
RT
‐
MC
S
‐
OT
B1
Bn
Bn
S
‐
OT
‐
MC
V
‐
MC
P
‐
MC
S
‐
FT
‐
MC
P
‐
B
P
‐
B
P
‐
B
*SL1
is
Plant
control
*OT1
or
RT
‐
MC
Sequence
control
Sequence
control,
Boiler
n
Heating
circuit,
Mixing
Sequence
control
1
‐
16
boilers
with
Mixing
header
and
System
pump
Sequence
control
1
‐
16
boilers,
Boiler
n
with
CT
Pump
circuit
Extension
module
with
2
x
Mixing
circuits
S
‐
FT
P
‐
SC
RT
‐
SC
S
‐
RT
‐
PC
RT
‐
PC
RT
‐
MC1
RT
‐
MC2
S
‐
RT
‐
SC
S
‐
RT
‐
MC1
S
‐
RT
‐
MC2
S
‐
OT
B1
Bn
S
‐
OT
‐
PC
Bn
P
‐
PC
S
‐
OT
‐
MC1
V
‐
MC1
S
‐
OT
‐
MC2
V
‐
MC2
P
‐
MC1
P
‐
MC2
S
‐
FT
‐
MC1
S
‐
FT
‐
MC2
P
‐
B
P
‐
B
P
‐
B
*SL1
is
Plant
control
*Opentherm
or
SL1
Sequence
control
Sequence
control,
Boiler
n
CT
Pump
Circuit
SL1
is
Heating
Circuit
control
Heating
circuit,
Mixing
circuit
1
Heating
circuit,
Mixing
circuit
2
Sequence
control
1
‐
16
boilers
with
Indirect
Hot
Water
Storage
Tank
Sequence
control
1
‐
16
boilers,
Boiler
n
with
CT
Pump
circuit
and
Indirect
HWS
circuit
Extension
module
with
1
x
Mixing
circuit
and
1
x
CT
Pumped
circuit
S
‐
FT
RT
‐
SC,
T
‐
HWS
S
‐
RT
‐
PC
RT
‐
PC,
T
‐
HWS
RT
‐
MC
S
‐
RT
‐
PC
RT
‐
PC
S
‐
RT
‐
SC
S
‐
RT
‐
MC
S
‐
OT
B1
Bn
P
‐
HWSC
S
‐
OT
‐
PC
Bn
P
‐
PC
P
‐
HWSC
S
‐
OT
‐
MC
V
‐
MC
S
‐
OT
‐
PC
P
‐
PC
S
‐
FT
‐
PC
TS
‐
HWS
TS
‐
HWS
P
‐
MC
S
‐
HWS
S
‐
HWS
S
‐
FT
‐
MC
P
‐
B
P
‐
B
P
‐
B
*SL1
is
Plant
control
*Opentherm
or
SL1
Sequence
control
Hot
Water
Storage
SL2
or
(SL2
and
T
‐
HWS:Opentherm
DHW
bit)
Sequence
control,
Boiler
n
CT
Pump
Circuit
Hot
Water
Storage
SL1
is
Heating
Circuit
control
Heating
circuit,
Mixing
CT
Pump
Circuit
SL2
or
(SL2
and
T
‐
HWS:Opentherm
DHW
bit)
Sequence
control
1
‐
16
boilers
with
a
CT
Pump
circuit
Sequence
control
1
‐
16
boilers,
Boiler
n
with
2
x
CT
Pump
circuit
Extension
module
with
1
x
Mixing
circuit
and
1
x
Air
Handler
circuit
S
‐
FT
S
‐
RT
‐
PC
RT
‐
SC
S
‐
FT
S
‐
RT
‐
PC1
S
‐
RT
‐
PC2
RT
‐
PCn
RT
‐
MC
S
‐
RT
‐
HC
RT
‐
HC
S
‐
RT
‐
SC
S
‐
RT
‐
SC
S
‐
RT
‐
MC
S
‐
OT
B1
Bn
P
‐
PC
S
‐
OT
‐
PC
Bn
P
‐
PC1
P
‐
PC2
S
‐
OT
‐
MC
V
‐
MC
S
‐
OT
‐
HC
P
‐
HC
S
‐
FT
‐
HC
P
‐
MC
AH
‐
HC
S
‐
FT
‐
MC
P
‐
B
P
‐
B
P
‐
B
*SL1
is
Plant
control
*Opentherm1
or
SL1,
Opentherm2
or
SL2
Sequence
control
CT
Pump
Circuit
Sequence
control,
Boiler
n
CT
Pump
Circuit
1
CT
Pump
Circuit
2
SL1
is
Heating
Circuit
control
Heating
circuit,
Mixing
Heater
Circuit
SL2
is
Heating
Circuit
control
Sequence
control
1
‐
16
boilers
with
Common
pump
and
optional
valves
Extension
module
with
1
x
Mixing
circuit
and
1
x
HWS
circuit
S
‐
FT
RT
‐
SC
RT
‐
MC,
T
‐
HWS
S
‐
RT
‐
SC
S
‐
RT
‐
MC
S
‐
OT
B1
Bn
S
‐
OT
‐
MC
V
‐
MC
PP
‐
HWS
SP
‐
HWS
P
‐
MC
TS
‐
HWS
S
‐
FT
‐
MC
S
‐
ST
‐
HWS
V
‐
B
V
‐
B
P
‐
SC
*SL1
is
Plant
control
Sequence
control
Heating
circuit,
Mixing
Hot
Water
Storage
Sequence
control
1
‐
16
boilers,
with
local
DHW
demand
Extension
module
with
2
x
Air
Handler
circuit
V
‐
DHW
S
‐
FT
RT
‐
SC
S
‐
RT
‐
HC1
RT
‐
HC1
S
‐
RT
‐
HC2
RT
‐
HC2
S
‐
RT
‐
SC
S
‐
OT
‐
HC1
P
‐
HC1
S
‐
OT
‐
HC2
P
‐
HC2
S
‐
OT
B1
Bn
S
‐
FT
‐
HC1
S
‐
FT
‐
HC2
TS
‐
HWS
AH
‐
HC1
AH
‐
HC2
S
‐
HWS
P
‐
B
P
‐
B
Heater
Circuit
Heater
Circuit
*SL1
is
Plant
control
Sequence
control
Extension
module
with
1
x
CT
pumped
circuit
and
1
x
HWS
circuit
Single
Boiler
with
a
CT
Pump
circuit
and
DHW
tank
S
‐
RT
‐
PC
RT
‐
MC,
T
‐
HWS
S
‐
RT
‐
PC
RT
‐
PC,
T
‐
HWS
S
‐
OT
‐
PC
P
‐
PC
PP
‐
HWS
SP
‐
HWS
S
‐
OT
P
‐
PC
P
‐
HWSC
S
‐
FT
‐
PC
TS
‐
HWS
TS
‐
HWS
S
‐
ST
‐
HWS
S
‐
HWS
CT
Pump
Circuit
Hot
Water
Storage
*Opentherm
or
SL1
Boiler
CT
Pump
Circuit
Hot
Water
Storage
SL2
or
(SL2
and
T
‐
HWS:Opentherm
DHW
bit)
Extension
module
with
1
x
CT
pumped
circuit
and
1
x
HWS
circuit
Single
Boiler
with
2
x
CT
Pump
circuits
S
‐
RT
‐
PC1
RT
‐
PC1
S
‐
RT
‐
PC2
RT
‐
PC2
S
‐
OT
‐
HWS
PP
‐
HWS1
PP
‐
HWS2
SP
‐
HWS1
SP
‐
HWS2
S
‐
OT
P
‐
PC1
P
‐
PC2
TS
‐
HWS1
TS
‐
HWS2
S
‐
ST
‐
HWS1
S
‐
ST
‐
HWS2
Hot
Water
Storage
Hot
Water
Storage
*Opentherm1
or
SL1,
Opentherm2
or
SL2
Boiler
CT
Pump
Circuit
CT
Pump
Circuit
Extension
module
with
Mixing
control
to
Plate
Heat
Exchanger
for
Direct
HWS
Single
Boiler
with
CT
and
HWS
Zone
circuits
S
‐
DHW
SP
‐
HWS
DHW
out
S
‐
RT
‐
PC1
RT
‐
PC1,
TS
‐
HWS
V
‐
MC
S
‐
OT
‐
HWS
S
‐
OT
S
‐
FT
‐
HWS
V
‐
CT
V
‐
HWS
S
‐
FT
‐
MC
TS
‐
HWS
TS
‐
HWS
S
‐
M
‐
HWS
S
‐
HWS
S
‐
B
‐
HWS
P
‐
SYS
*Opentherm
or
SL1
P
‐
MC
Boiler
CT
Pump
Circuit
Hot
Water
Storage
SL2
or
(SL2
and
T
‐
HWS:Opentherm
DHW
bit)
P
‐
HWS
CWS
in
Single
Boiler
with
2
x
CT
Zone
circuits
Direct
HWS
S
‐
RT
‐
CT1
RT
‐
PC1
S
‐
RT
‐
CT2
RT
‐
PC2
Extension
module
with
Mixing
control
to
Plate
Heat
Exchanger
for
Direct
HWS
with
DHW
pump
S
‐
OT
V
‐
CT1
V
‐
CT2
S
‐
DHW
SP
‐
HWS
DHW
out
V
‐
MC
S
‐
OT
‐
HWS
S
‐
FT
‐
HWS
P
‐
SYS
S
‐
FT
‐
MC
TS
‐
HWS
DHW
ret
P
‐
DHW
*Opentherm1
or
SL1,
Opentherm2
or
SL2
Boiler
CT
Pump
Circuit
CT
Pump
Circuit
S
‐
M
‐
HWS
S
‐
B
‐
HWS
P
‐
MC
Alternative
DHW
ret
P
‐
HWS
P
‐
DHW
CWS
in
Direct
HWS
Extension
module
with
Mixing
control
to
Plate
Heat
Exchanger
for
Direct
DHW
with
pump
V
‐
MC
S
‐
OT
‐
HWS
S
‐
FT
‐
HWS
S
‐
FT
‐
MC
DHW
out
DHW
ret
P
‐
DHW
P
‐
MC
CWS
in
Direct
DHW
Extension
module
with
Primary
Buffer
Mixing
control
to
Plate
Heat
Exchanger
for
Direct
DHW
with
pump
V
‐
MC
S
‐
OT
‐
HWS
S
‐
FT
‐
HWS
S
‐
FT
‐
MC
DHW
out
DHW
ret
S
‐
PB
P
‐
DHW
P
‐
MC
CWS
in
Direct
DHW
with
Primary
Buffer
VariCAN
Adapter B1..Bn..EMn
VariCAN
Adapter
B1..Bn..EMn
DI1
Ext.
Timer/
Enable
or
Holiday
DI3
Ext.
Timer/
Enable
or
Holiday
VariCAN
Adapter B1..Bn..EMn
Bn
Connections
DI3
Ext.
Timer/
Enable
or
Holiday
VariCAN
Adapter B1..Bn..EMn
DI1
Ext.
Timer
or
Enable
S
‐
PB
S1
Override
or
Pump
Flt
DI2
S
‐
ST
‐
HWS2
S4
TS
‐
HWS1
DI1
S
‐
OT
‐
HWS
S3
S
‐
ST
‐
HWS1
S1
DI3
TS
‐
HWS2
DI1
Ext.
Timer/
Enable
or
Holiday
DI2
Override
or
Pump
Flt
S4
S
‐
HWS
DI3
TS
‐
HWS
DI4
Override
or
Pump
Flt
VF4
PP
‐
HWS
S1
S
‐
RT
‐
PC
VF5
SP
‐
HWS
S2
S
‐
FT
‐
PC
OT1
RT
‐
PC,
T
‐
HWS
S3
S
‐
OT
‐
PC
DI4
Override
or
Pump
Flt
VariCAN
Adapter B1..Bn..EMn
Bn
Connections
Inputs
Outputs
VF1
P
‐
PC
OT2
RT
‐
HC2
S4
S
‐
RT
‐
HC2
S5
S
‐
FT
‐
HC2
S6
S
‐
OT
‐
HC2
DI3
Ext.
Timer/
Enable
or
Holiday
S
‐
FT
‐
HC1
VF4
P
‐
HC2
S3
S
‐
OT
‐
HC1
VF5
AH
‐
HC2
DI1
Ext.
Timer/
Enable
or
Holiday
DI2
Override
or
Pump
Flt
VariCAN
Adapter B1..Bn..EMn
DI3
TS
‐
HWS
Bn
Connections
Inputs
Outputs
OT1
RT
‐
HC1
VF1
P
‐
HC1
S1
S
‐
RT
‐
HC1
VF2
AH
‐
HC1
DI4
Override
or
Pump
Flt
DI2
Override
or
Pump
Flt
S4
S
‐
HWS
Inputs
Outputs
VF1
P
‐
MC
S1
S
‐
RT
‐
MC
VF2
V
‐
MC
open
S2
S
‐
FT
‐
MC
VF3
V
‐
MC
close
S3
S
‐
OT
‐
MC
VF4
PP
‐
HWS
Ext.
Timer/
Enable
or
Holiday
VF5
S4
S
‐
RT
‐
HC
S5
S
‐
FT
‐
HC
S6
S
‐
OT
‐
HC
DI3
Ext.
Timer/
Enable
or
Holiday
S1
S
‐
RT
‐
MC
VF2
V
‐
MC
open
S2
S
‐
FT
‐
MC
VF3
V
‐
MC
close
S3
S
‐
OT
‐
MC
VF4
P
‐
HC
DI1
Ext.
Timer/
Enable
or
Holiday
VF5
AH
‐
HC
DI4
Override
or
Pump
Flt
VariCAN
Adapter B1..Bn..EMn
Bn
Connections
Inputs
Outputs
OT1
RT
‐
MC
VF1
P
‐
MC
OT2
RT
‐
PC
S4
S
‐
RT
‐
PC
S5
S
‐
FT
‐
PC
S6
S
‐
OT
‐
PC
DI3
Ext.
Timer/
Enable
or
Holiday
S3
S
‐
OT
‐
MC
VF4
P
‐
PC
DI1
Ext.
Timer/
Enable
or
Holiday
DI2
Override
or
Pump
Flt
Opentherm2
RT
‐
PC2
Opentherm2
RT
‐
PC2
SL1
VariCAN
Adapter
B1..Bn
SL2
or
Enable
or
Override
Bn
Connections
DI1
Ext.
Timer/
Enable
or
Holiday
P1
(0
‐
10V)
V
‐
CT1
Boiler
Connections
Inputs
Outputs
Opentherm1
RT
‐
PC1
Boiler
run
Room
S
‐
RT
‐
PC1
Room
S
‐
RT
‐
CT2
or
P2
SL1
RT
‐
CT1
P1
(0
‐
10V)
V
‐
CT1
SL2
RT
‐
CT2
or
P2
P3
V
‐
CT2
Tank
S
‐
RT
‐
CT2
or
P2
SL1
RT
‐
CT1
P3
V
‐
HWS
SL2
TS
‐
HWS
or
P2
Boiler
Connections
Inputs
Outputs
Opentherm
RT
‐
PC1
Boiler
run
Room
S
‐
RT
‐
PC1 Boiler
fault
Outside
S
‐
OT
P1
(0
‐
10V)
P
‐
SYS
Boiler
fault
Outside
S
‐
OT
P1
(0
‐
10V)
P
‐
SYS
Room
S
‐
RT
‐
PC2
Boiler
Connections
Inputs
Outputs
Opentherm1
RT
‐
PC1
Boiler
run
Room
S
‐
RT
‐
PC1
Boiler
fault
Outside
S
‐
OT
P1
(0
‐
10V)
P
‐
PC1
or
P2
SL1
RT
‐
PC1
P3
P
‐
PC2
SL2
RT
‐
PC2
P
‐
HWSC
SL2
Outside
S
‐
OT
P1
(0
‐
10V)
P
‐
PC
Tank
S
‐
HWS
or
P2
SL1
RT
‐
PC
TS
‐
HWS
P3
Bn
Connections
Inputs
Outputs
S2
S
‐
FT
‐
MC
VF2
V
‐
MC
open
S2
S
‐
FT
‐
MC
VF3
V
‐
MC
close
S6
S
‐
FT
‐
DHW
S7
SP
‐
HWS
VF5
P
‐
DHW
P
‐
MC
VF1
DI2
Override
or
Pump
Flt
DI2
Override
or
Pump
Flt
Inputs
Outputs
S2
S
‐
FT
‐
MC
VF1
P
‐
MC
S2
S
‐
FT
‐
MC
VF2
V
‐
MC
open
S6
S
‐
FT
‐
DHW
VF3
V
‐
MC
close
S7
SP
‐
HWS
VF5
VariCAN
Adapter B1..Bn..EMn
P
‐
DHW
S6
S
‐
FT
‐
DHW
S7
SP
‐
HWS
DI1
TS
‐
HWS
DI2
Override
or
Pump
Flt
S3
S
‐
FT
‐
HWS
VF3
V
‐
MC
close
S5
S
‐
B
‐
HWS
VF4
P
‐
HWS
S6
S
‐
FT
‐
DHW
VF5
P
‐
DHW
Inputs
Outputs
S1
S
‐
M
‐
HWS
VF1
P
‐
MC
S2
S
‐
FT
‐
MC
VF2
V
‐
MC
open
Bn
Connections
Inputs
Outputs
S1
S
‐
M
‐
HWS
VF1
P
‐
MC
S2
S
‐
FT
‐
MC
VF2
V
‐
MC
open
DI1
TS
‐
HWS
VF3
V
‐
MC
close
VF4
P
‐
HWS
DI2
Override
or
Pump
Flt
S7
SP
‐
HWS
S3
S
‐
FT
‐
HWS
S5
S
‐
B
‐
HWS
Bn
Connections
B1..Bn..EMn
VariCAN
Adapter
Override
or
Pump
Flt
DI4
VF4
PP
‐
HWS2
VF5
SP
‐
HWS2
Bn
Connections
Inputs
Outputs
VF1
PP
‐
HWS1
VF2
SP
‐
HWS1
VariCAN
Adapter
B1..Bn..EMn
Header
S
‐
FT
Outside
S
‐
OT
P3
V
‐
DHW
S2
SL2
SL1
DI1
Boiler
Connections
Inputs
Outputs
Opentherm
RT
‐
PC
Boiler
run
Room
S
‐
RT
‐
SC
Boiler
fault
SP
‐
HWS
DI4
Override
or
Pump
Flt
VariCAN
Adapter B1..Bn..EMn
Bn
Connections
OT1
RT
‐
MC,
T
‐
HWS
DI2
Override
or
Pump
Flt
VariCAN
Adapter B1..Bn..EMn
DI2
Override
or
Pump
Flt
OT2
RT
‐
HC
OT1
RT
‐
MC1
S1
S
‐
RT
‐
MC1
VariCAN
Adapter B1..Bn..EMn
Override
or
Pump
Flt
DI4
S6
S
‐
OT
‐
MC2
Bn
Connections
Inputs
Outputs
OT1
RT
‐
MC
VF1
P
‐
MC
S1
S
‐
RT
‐
MC
VF2
V
‐
MC
open
S2
S
‐
FT
‐
MC
VF3
V
‐
MC
close
VF6
V
‐
MC2
close
OT2
RT
‐
MC2
Override
or
Pump
Flt
DI2
DI1
Ext.
Timer/
Enable
or
Holiday
S
‐
RT
‐
MC2
S4
DI3
Ext.
Timer/
Enable
or
Holiday
S5
S
‐
FT
‐
MC2
S2
S
‐
FT
‐
MC1
VF3
V
‐
MC1
close
S3
S
‐
OT
‐
MC1
VF4
P
‐
MC2
VF5
V
‐
MC2
open
Bn
Connections
Inputs
Outputs
VF1
P
‐
MC1
VF2
V
‐
MC1
open
V
‐
MC
close
S3
S
‐
OT
‐
MC1
Bn
Connections
Inputs
Outputs
VF1
P
‐
MC
VF2
V
‐
MC
open
OT1
RT
‐
MC
VF3
S1
S
‐
RT
‐
MC
S2
S
‐
FT
‐
MC
Tank
S
‐
HWS
P1
(0
‐
10V)
P
‐
B
or
P2
B1..Bn
B1
Connections
Inputs
Outputs
Ext.Timer
or
Enable
or
Override
TS
‐
HWS
VariCAN
Adapter
Opentherm
RT
‐
SC
Boiler
run
Room
S
‐
RT
‐
SC
Boiler
fault
or
P2
or
Enable
or
Enable
Boiler
fault
Header
S
‐
FT
P1
(0
‐
10V)
Bn
Connections
Inputs
Outputs
Boiler
run
Boiler
fault
P1
(0
‐
10V)
P
‐
B
or
P2
Header
B1
Connections
Inputs
Outputs
Opentherm
VariCAN
Adapter
B1..Bn
RT
‐
SC
Boiler
run
Room
S
‐
RT
‐
SC
Boiler
fault
S
‐
FT
P1
(0
‐
10V)
SL1
Ext.Timer P1
(0
‐
10V)
Outside
S
‐
OT
or
P3
SL1
Ext.Timer
P2
B
‐
V
or
Enable
or
Override
VariCAN
Adapter
B1..Bn
P
‐
SC
Header
S
‐
FT
P1
(0
‐
10V)
or
P2
or
Override
VariCAN
Adapter
Outside
S
‐
OT
P
‐
B
P
‐
B
P1
(0
‐
10V)
P
‐
B
P
‐
B
or
Override
Outside
S
‐
OT
Ext.Timer
or
Enable
or
P2
B1
Connections
Inputs
Opentherm
RT
‐
SC
Room
S
‐
RT
‐
SC
Header
S
‐
FT
Outputs
Boiler
run
Boiler
fault
P1
(0
‐
10V)
SL1
Room
S
‐
RT
‐
SC
Boiler
fault
B1
Connections
Inputs
Outputs
Opentherm
RT
‐
SC
Boiler
run
P
‐
SC
B1..Bn
or
Enable
B1
Connections
Inputs
Outputs
Opentherm
RT
‐
SC
Boiler
run
Room
S
‐
RT
‐
SC
or
Override
P
‐
HWSC
VariCAN
Adapter
B1..Bn
Outside
S
‐
OT
or
P2
SL1
Ext.Timer
Tank
S
‐
HWS
Outside
S
‐
OT
Opentherm
RT
‐
SC
Boiler
run
Room
S
‐
RT
‐
SC
VariCAN
Adapter
B1..Bn
P
‐
PC
or
P2
or
Override
Tank
S
‐
RT
‐
PC
P1
(0
‐
10V)
SL1
Ext.Timer
or
P2
Header
S
‐
FT
P3
B1
Connections
Inputs
Outputs
SL2
TS
‐
HWS
Boiler
fault
VariCAN
Adapter
B1..Bn
Bn
Connections
Inputs
Outputs
VariCAN
Adapter
B1..Bn
Boiler
run
Boiler
fault
P
‐
B
or
P2
P1
(0
‐
10V)
or
P2
Ext.Timer
or
Enable
Opentherm
RT
‐
PC
Room
S
‐
RT
‐
PC
P
‐
PC
or
Override
P1
(0
‐
10V)
Inputs
Outputs
Opentherm
RT
‐
PC
Boiler
run
Room
S
‐
RT
‐
PC
Boiler
fault
VariCAN
Adapter
B1..Bn
P1
(0
‐
10V)
P
‐
B
or
P2
or
Enable P1
(0
‐
10V)
P
‐
PC
or
Override
or
P2
SL2
TS
‐
HWS
P3
P
‐
HWSC
Tank
S
‐
HWS
Ext.Timer
SL1
Bn
Connections
Inputs
Outputs
Opentherm
RT
‐
PC
Boiler
run
P
‐
PC1
or
Override
or
P2
Ext.Timer
P3
P
‐
PC2
Room
S
‐
RT
‐
PC1 Boiler
fault
Room
S
‐
RT
‐
PC2
P1
(0
‐
10V)
P
‐
B
SL1
Ext.Timer
or
P2
or
Enable P1
(0
‐
10V)
Figure 11 SiNgLe BOiLer WiTH A CT PuMP CirCuiT AND DHW TANK
Figure 12 SiNgLe BOiLer WiTH 2 X CT PuMP CirCuiTS
Figure 13 SiNgLe BOiLer WiTH CT AND HWS ZONe CirCuiTS
