Vaillant VR 71 - 4.4.3 FM3 and FM5 functional modules; 4.5 Connection assignment for the FM5 functional module

0020288151_04 Operating and installation instructions 29
4.4.3 FM3 and FM5 functional modules
If the FM3 and FM5 functional modules are installed in a system, each additional installed FM3 functional module adds two
mixed heating circuits to the system.
The potential configuration (FM3+FM5) corresponds to a defined terminal assignment for the FM3 (→ Section 4.6) functional
module.
4.5 Connection assignment for the FM5 functional module
S1
12
S2
12
S3
12
S4
12
S5
12
S6
12
S7
12
S8
12
S9
12
S10
12
S11
12
S12
OI
S13
OI
R7/8
N 1 2
R13
NN
R11/12
N 1 2
R9/10
N 1 2
R6
L
N
R5
L
N
R4
L
N
R3
L
N
R2
L
N
R1
L
N
230V
L
N
230V
L
N
BUS
-+
4
5
1
2
3
R7/8
N 1 2
R11/12
N 1 2
R9/10
N 1 2
S12
OI
S13
OI
1 Input sensor terminals
2 Signal terminals
3 eBUS terminal
When connecting, pay attention to the polarity!
4 Output relay terminals
5 Power supply
S6 to S11 sensor terminals: An external control can also be connected
S12, S13 signal terminals: I = input, O = output
R7/8, R9/10, R11/12 mixer output: 1 = open, 2 = closed
You can configure the contacts for external inputs in the system control.
– Open, deact.: Contacts open, no heat demand
– Bridge,deact.: Contacts closed, no heat demand
Configur-
ation
R1 R2 R3 R4 R5 R6 R7/R8 R9/R10 R11/R12 R13
1 3f1 3f2 9gSolar MO 3j 3c/9e 9k1op/
9k1cl
9k2op/
9k2cl
– –
2 3f1 3f2 3f3 MO 3j 3c/9e 9k1op/
9k1cl
9k2op/
9k2cl
9k3op/
9k3cl
–
3 3f1 3f2 3f3 MO – 3c/9e 9k1op/
9k1cl
9k2op/
9k2cl
9k3op/
9k3cl
–
6 3f1 3f2 3f3 MO 9gSolar 3c/9e 9k1op/
9k1cl
9k2op/
9k2cl
9k3op/
9k3cl
–
Configur-
ation
S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13
1 SysFlow FS1 FS2 DHW
Bt2
DHW DHWBt COL Solar
yield
DEM2 TD1 TD2 PWM –
2 SysFlow FS1 FS2 FS3 DHW DHWBt COL Solar
yield
– TD1 TD2 PWM –
3 SysFlow FS1 FS2 FS3 BufBt DEM1 DEM2 DEM3 DHW – – – –