7
Colour Code
Bk Black
Bl
Blue
Br
Brown
G
Green
Gy Grey
G/Y Green/Yellow
R
Red
W
White
B4
M
When an Alpha Climatic control is
connected to terminals 41 and 44
remove the links between terminal
blocks 1 and 2
Remove link to
connect 230 V
room thermostat
Mains Supply
230 V ~ 50 Hz
230 V Room
thermostat
(optional)
External pump
(optional)
230 Vac Max 1 A
Programmer clock
(optional)
Remove link to
connect clock
Bk
Bl
Br
Gy
W
(Heating)
CH1 - DHW OFF
(DHW ON
)
CH2 - CH ON
(Common)
Br
GY
Br
Bl
W
Bl
Bl
Br
G/Y
G/Y
G/Y
Bk
Bk
Storage tank
NTC probe
(optional)
230 Vac DHW
request signal
Diverter valve
(optional)
Alpha Climatic
(optional)
36
38
41
37
6
5
39
44
G
G
W
W
Bk
R
L
N
1
2
3
4 L2 N2
Br
Br
Bl
Bl
R
Bl
Bk
R
G/Y
Ch 1
Ch 2
1
2
3
4
5
'230 Vac DHW request signal' is alternative to
'Diverter valve' and Storage tank NTC probe
X1
X2
NC COM NO
Relay board (optional)
X15 on PCB X3 on PCB
X16 on PCB
X12 on PCB
X14 on PCB
COM
NO
Alpha E-Tec 25R - Technical Data
Note: This Appliance Must Be Earthed
Optional integral controls are available if required.
Note:
Only use the Alpha two channel controls.
Do not fit any single channel controls*.
Fig. 3.1 shows the Internal two channel clock option for S or Y plan. Alternatively bring a Switched Live from external controls
to terminal 1.
DO Not
connect an Alpha Climatic control when the proprogrammer clock is connected.
3.5 ELECTRICAL CONNECTIONS
Fig. 3.1
3.6 DATA BADGE ANNOTATION
Md
Sr N
o
Type
Q
nw
/Q
n min.
PMS
NO
x
Class
Q
nw
/Q
n max.
PMW
Cod. Md
Cod. PIN
P
n min.
D
P
n max.
TM
CONDENSING
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
nw min.
.....................DHW minimum heat input
Q
n min.
.......................CH minimum heat input
Q
nw max.
....................DHW maximum heat input
Q
n max.
......................CH maximum heat input
P
n min.
.......................Minimum heat output
P
n max.
.......................Maximum heat output
PMS ..........................Maximum system pressure
PMW .........................Maximum DHW pressure
D ...............................Specific flow rate
TM ............................Maximum operating
temperature
NO
x
Class .................NO
x
Class
CONDENSING .........Condensing boiler
NOTE:
Technical data is provided on the boiler data label and in Section 3.1.
* If the boiler is used for heating only a single
channel control can be fitted.
Fit the clock or receiver as normal and connect
a link between terminals L and 3 on the boiler.