32
Instructions for the installer
3.22 -
WIRING DIAGRAM for
ALKON 50
MDV
= Motor 3 way valve
P SYST.
= Pump system
SS
= DHW sensor
Note: Any accessories shown in the drawn
are not available for this model of boiler
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation.
21
BLACK (-)
BROWN (PWM)
BLUE (TACHO)
4
5
BLUE (N)
12
BROWN (L1)
3
RIL./REG.
ALIM.
120V
SRR
SR
BR
O
W
N
BR
O
W
N
BL
U
E
YE
L
L
/G
R
EE
N
E. RIV.
WH
IT
E
BLACK
DK
BR
O
W
N
BL
U
E
BL
U
E
BLUE
BROWN
Fs
1
BLACK
BLUE
BROWN
ORANGE
P
BL
U
E
BR
O
W
N
YELL-GREEN
GREEN
GREEN
WHITE
WHITE
WH
IT
E
BROW
N
BLUE
BROWN
GR
E
E
N
RE
D (
CH)
W
H
IT
E
(
DHW
)
IG
VM
L1
N
120 V - 60 Hz
SS
MDV
00333986
BL
U
E
-
N
BR
O
W
N
-
L
E. ACC
TR. ACC
BLUE
BROWN
RED
YE
L
/GR
E
E
N
VG
YEL/GREEN
OR
Only with
BROWN
BLUE
BLACK
WHITE
TL
TF
B
LA
C
K
BL
U
E
PF
BL
U
E
CDS-1
YELL-GREEN
BR
O
W
N
BL
U
E
P
BOILER
SYSTEM
P
1 (NC)
BROWN
3 ( C )
WHITE
BLUE
= Minimum water pressure switch
= Ignition electrode
= Detection electrode
= Power switch On-Off
= Pump boiler (optional)
= CH sensor
= CH return sensor
= Limit thermostat
= Smoke thermostat (only pre-arrangement)
= Ignition transformer
= Gas valve
= Modulating fan detection/adjustment
DK
E. ACC
E. RIV.
IG
P
SR
SRR
TL
TF
TR.ACC
VG
VM
CSD - 1
Prearrangement for the
connection of the
additional safety devices
