INSTALLATION INSTRUCTIONS
7
2.4 Water circuit
LEGEND
1.
SAFETY THERMO FUSE
2.
MANUAL AIR VENT VALVE
3.
HEATING SENSOR
4.
HEATING SAFETY THERMOSTAT
5.
PREMIX BURNER UNIT (GAS MANIFOLD
+ BURNER)
6.
PRIMARY CONDENSING HEAT
EXCHANGER
7.
EXPANSION VESSEL
8.
FAN
9.
ELECTRONIC GAS VALVE
10.
NO-RETURN VALVE
11.
AUTOMATIC AIR VENT VALVE
12.
PUMP
13.
3 BAR PRESSURE RELIEF VALVE - HTG
CIRCUIT
14.
SYSTEM DRAIN VALVE
15.
AUTOMATIC BY-PASS
16.
IGNITION ELECTRODE
17.
IONISATION ELECTRODE
18.
CONDENSATE DRAIN PIPE
19.
VENTURI
20.
ROOM SEAL CHAMBER BACK SIDE
21.
CONDENSATE TRAP
22.
DHW EXCHANGER
23.
ELECTRONIC FLOWSWITCH
24.
3-WAY VALVE
25.
FLOW LIMITER
26.
WATER PRESSURE SWITCH
27.
WATER PRESSURE GAUGE
28.
FILLING TAP
29.
CYLINDER SAFETY VALVE 7 ATM
30.
MAGNESIUM ANODE
31.
D.H.W. SENSOR
32.
CYLINDER
33.
D.H.W. EXPANSION VESSEL
34.
CYLINDER DRAINING TAP
LEGEND
HR
HEATING RETURN
HF
HEATING FLOW
G
GAS
CWI
COLD WATER INLET
HWO
HOT WATER OUTLET
CD
CONDENSATE DRAIN
22
24
18
23
11
CD
HR HWO G
CWI
HF
20
19
2
7
1
5
16
17
8
9
3
6
4
29
30
31
32
33
34
Summary of Contents for RK 25 /B
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