5.2.5 Wiring diagram WCM-EM as DHW load circuit
230V
PE
L N
MFA1
PE
L N
eBUS
+ –
eBUS
+ –
B1
1
M
B3
1
M
B6
1
M
1
M
H1
L
E
MM1
N PE
WCM-EM 2.1
Mains
230V 1/N/PE 50Hz
H1
L
PE
N
L
N PE
M
1~
M1
M
1~
MM1
F11
16A
eBUS
B3
B1
0 1
F
E
D
C
B
A 9 8 7 6
5
4
3
2
M
1~
MM2
Plug
Colour
Connection
Remarks
230 V
black
Supply voltage
230 V AC/50 Hz
–
H1
turquoise
Variable input
Signal input with variable function
MFA 1
purple
Hot water load pump
max. 5 A* **
MM1
yellow
Circulation pump
max. 5 A* **
MM2
yellow
Antilegionella bypass pump
max. 5 A* **
eBUS
light blue
eBUS connection
–
B1
green
Circulation sensor
NTC 5 k
Ω
Additional circulation pump shut off when
return temperature increases
B3
yellow
DHW sensor
NTC 12 k
Ω
WCM-EM acts as DHW load circuit
* for electronic high efficiency pumps max 1.5 Ampere. Separate relay required for
greater power consumptions.
** Power consumption of outputs MFA 1 and MM1 in total maximal 5A.
5.2.6 Connecting the pump shut off set to the WCM-EM
A thermal shut off device must be fitted when using underfloor heating (accessory).
Installation and operating instruction
Remote control station WCM-FS 2.0 and extension module WCM-EM 2.1
5 Electrical installation
83277502 • 3/2012-10 • La
24-106
Содержание WCM-EM 2.1
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