21
4.7
Main water circuit
3
37
5
6
14
13
15
16
18
19
30
29
10
9
8
11
17
21
22
24
23
27
36
38
39
35
32
33
34
28
31
26
25
20
12
7
S3
M
U
G
E
R
S
4
2
1
Fig. 35
KEY:
M System delivery
R System return
U Domestic hot water outlet
E Domesti hot water inlet
S Safety valve outlet
G Gas supply
S3 Condensate outlet
1
Primary heat exchanger
2
Domestic hot water sensor
3
Boiler fan
4
Thermal safety thermostat
5
Heating delivery probe
6
Domestic hot water heat exchanger
7
Diverter valve
8
Automatic by-pass
9
Condensate siphon outlet
10
Gas valve
11
Domestic hot water flow meter
12
Domestic hot water filter
13
System filling
14
Gas boiler outlet
15
System relief valve
16
Pump
17
Automatic bleed valve
18
Pressure transducer
19
System expansion vessel
20
HP water inlet probe
21
System delivery valve (on request)
22
Gas valve (on request)
23
Domestic hot water inlet valve (on request)
24
System return valve (on request)
25
Return temperature probe
26
HP water outlet temperature probe
27
Plate heat exchanger
28
HP ON/OFF compressor
29
Expansion valve thermal bulb
30
HP high pressure switch
31
Liquid level indicator
32
Thermostatic expansion valve
33
Filter
34
Liquid receptacle
35
Air evaporator
36
HP high pressure switch
37
Smoke evaporator
38
Smoke HP by-pass solenoid valve
39
HP battery probe
