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