A
1"
B
142
C
78
A
A
B
E
D
C*
D
90
E
40
F
G
F
234
G
267
H
I
L
H
205
I
320
Code
152
650/651
L
120
12
3
6
9
18
17
16
15
14
1
3
12
1
1
10
9
8
7
6
5
4
3
2
1
24
23
22
21
20
19
WATCH
CALEFFI
30
40
50
60
70
80
90
-25%
+25%
-50%
0
22
24
26
28
30
32
34
Dimensions
Characteristic components
SYSTEM
FLOW
7
1
4
2
6
7
3
5
SYSTEM
RETURN
FLOW FROM
BOILER
BOILER
RETURN
16
18
20
22
24
CALEFFI
8
10
30
10
0
11
12
3
6
9
18
17
16
15
14
1
3
12
1
1
10
9
8
7
6
5
4
3
2
1
24
23
22
21
20
19
WATCH
CALEFFI
30
40
50
60
70
80
90
-25%
+25%
-50%
0
22
24
26
28
30
32
34
20
20
10
60
30
10
0
20
20
10
60
9
12
➩
➩
➩
➩
0
1 4-way mixing valve.
0
2 Digital temperature controller for heating and cooling.
0
3
Circulating pump:
code
152
650 GRUNDFOS UPS 25-60
code
152
651 GRUNDFOS UPS 25-80.
0
4
Differential by-pass valve
with graduated scale.
0
5 Flow temperature sensor.
0
6 Outside temperature sensor
- connected via terminal.*
0
7
Circuit flow and return thermometers
in pockets.
0
8
Connection point for remote transmission.
0
9 Limit control sensor for max relative humidity RH%.*
10 Room thermostat and indoor sensor
(option for 152).
*
11
Servomotor.
12
Return temperature sensor.
*
Max length of sensor cable: 150 m.
12
3
6
9
18
17
16
15
14
1
3
12
11
10
9
8
7
6
5
4
3
2
1
24
23
22
21
20
19
WATCH
CALEFFI
30
40
50
60
70
80
90
-25%
+25%
-50%
0
1
2
5
6
7
10
8
11
9
12
3
4
22
24
26
28
30
32
34
4-way mixing valve
Servomotor
Pump
Automatic by-pass
Differential by-pass
Thermometer
M
M
SR
SF
BR
BF
Hydraulic diagram
Temperature controller
The controller, which is normally installed on the unit, can also be
positioned remotely, following the electrical wiring scheme.
