16
5.6
Main water circuit
3
4
7
8
13
21
2
10
11
12
23
24
14
15
M
U
G
E
R
S
28
5
25
9
26
22
6
18
17
16
27
20
19
1
Fig. 11
KEY:
M System delivery
R System return
U Domestic hot water outlet
E Domesti hot water inlet
S Safety valve outlet
G Gas supply
1
Primary heat exchanger
2
Domestic hot water sensor
3
Boiler fan
4
Dual sensor (thermal safety/delivery)
5
Air inlet probe (SIA)
6
Domestic hot water heat exchanger
7
Diverter valve
8
Expansion valve thermal bulb
9
Refrigerant gas high-pressure pressure switch
10
Gas valve
11
Domestic hot water flow meter
12
Domestic hot water filter
13
System filling
14
Boiler drain
15
System relief valve
16
System pump
17
Air bleed valve
18
Water pressure transducer
19
System expansion vessel
20
Return 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
Air evaporator
26
Thermostatic expansion valve
27
Refrigerant gas/water capacitor
28
ON/OFF compressor (CP)
m
CAUTION
You MUST install a Y filter (not supplied with the
appliance) on the heating system return (R).
