GENERAL INFORMATION
7
2.4 Circulation pump head/flow graph
2.5 Water circuit
LEGEND
1.
PRIMARY HEAT EXCHANGER
2.
MAIN BURNER
3.
IGNITION ELECTRODE
4.
IONISATION ELECTRODE
5.
HEATING SAFETY THERMOSTAT
6.
ELECTRONIC GAS VALVE
7.
EXPANSION VESSEL
8.
CIRCULATING PUMP WITH AIR VENT
9.
AUTOMATIC AIR VENT VALVE
10.
3 bar PRESSURE RELIEF VALVE
11.
PRESSURE GAUGE
12.
FLUE HOOD
13.
WATER PRESSURE SWITCH
14.
HEATING SENSOR
15.
AUTOMATIC BY-PASS
16.
AIR PRESSURE SWITCH
17.
ELECTRIC FAN
LEGEND
HR
HEATING RETURN
CWI
COLD WATER INLET
HF
HEATING FLOW
G
GAS
I
II
III
Flow rate l/h
Head
(k
Pa)
Available head at minimum speed
I
II
Available head at second speed
Available head at maximum speed
III
Appliance losses
2
17
7
14
14
5
16
12
3
4
1
HR
G
CWI
HF
13
15
10
