Alpha InTec2 20SE Installation And Servicing Instruction page 7

2.5 ELECTRICAL CONNECTIONS
Note: This Appliance Must Be Earthed
Optional integral two channel controls are available if required.
Note: Only use the Alpha two channel controls. Do not fit any single channel controls.
Remove link to
connect clock
Programmer clock
(optional)
Bl
2
3 4
1
X20
Relay board
(optional)
X21
50 51 52 53 54 55 56
Br
R
Bl
Bl Gy
Br Bk W
G/Y Bk G/Y
L N A B 1 2 3 4
Bk
Br CH
Bl G/Y
Mains Supply
220 V ~ 50 Hz
Room
Remove link
thermostat
to connect 220 V
(optional)
room thermostat
When an Alpha Climatic control is connected to terminals 41 and 44
remove the links between terminal blocks 1 and 2
2.6 DATA BADGE ANNOTATION
NOTE: Technical data is provided on the boiler data / wiring label and in Section 2.1.
Md
Sr N
o
Type
Q /Q Q /Q
nw n min. nw
PMS PMW
NO Class
x
Md.............................Model
Cod. Md ....................Model code
Sr N o .........................Serial number
CHK ..........................Check
Cod. PIN ...................PIN code
Type ..........................Type of installation (ref. CEN TR 1749)
Q .....................DHW minimum heat input
nw min.
Q .......................CH minimum heat input
n min.
Q ....................DHW maximum heat input
nw max.
Q ......................CH maximum heat input
n max.
X1 on PCB
X1 on PCB
W
5
Bk
Gy
Br
X26
57 58
R Br Or
Bl Bk Br W
5 6 7 21 40 41 44 41 14 15 38 39 38 48
Br
Bl
DHW
X70
M
3-way valve
B4
(optional)
Alpha Storage tank
Climatic Control NTC sensor
(optional) (optional)
Cod. Md
Cod. PIN
P
n max. n min.
D
X4 and X9 on PCB
X5 on PCB
Y
Y
X70 Low temperature circuit thermostat
R8 B4 External sensor
R8 Cylinder resistor
Colour Code
G
Bk Black
Gy Grey
Bl Blue
G/Y Green/Yellow
Br Brown
Fig. 2.3
P
n max.
TM
P .......................Minimum heat output
n min.
P .......................Maximum heat output
n max.
PMS ..........................Maximum system pressure
PMW .........................Maximum DHW pressure
D ...............................Specific flow rate
TM ............................Maximum operating
temperature
NO Class .................NO
x
CONDENSING .........Condensing boiler
Alpha InTec² 20SE and 30SE - Technical Data
Green Or Orange
R Red
V Violet
CONDENSING
Class
x
W White
Y Yellow
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