Installation Manual
Wall Hung Boiler with D.H.W. Storage Cylinder Low Nox – Cod. 99881NA – July 2001
21
KEY
For U.K. and Ireland
1.
FRAME
2.
FLUE HOOD – OPEN COMBUSTION CHAMBER
3.
FLUE HOOD – ROOM SEALED COMBUSTION
CHAMBER
4.
COMBUSTION CHAMBER
5.
ROOM SEALED CHAMBER COVER
6.
ROOM SEALED CHAMBER BACK
7.
HEAT EXCHANGER Mod. 20.000
8.
MULTIGAS BURNER WITH 24 RAMPS
9.
IGNITION ELECTRODE
10.
FLAME IONISATION ELECTRODE
11.
HEATING SAFETY THERMOSTAT
12.
ELECTRONIC GAS VALVE VK4105 A 1001
13.
GAS PRESSURE MODULATOR
14.
ELECTRONIC IGNITION BOARD
15.
EXPANSION VESSEL
16.
3-SPEED CIRCULATION PUMP WITH AIR VENT
17.
AUTOMATIC AIR VENT
18.
HEATING CIRCUIT 3 bar PRESSURE RELIEF
VALVE
19.
DRAINING TAP
20.
WATER PRESSURE GAUGE
21.
WATER PRESSURE SWITCH
22.
HEATING SENSOR
23.
HOT WATER SENSOR
24.
3-WAY DIVERTER VALVE
25.
FLOWSWITCH CONNECTION WITH FLOW
LIMITER
26.
ELECTRONIC FLOWSWITCH
27.
25 LITRE WATER STORAGE TANK
28.
ANODE CONTROL VALVE
29.
ANODE
30.
PLATE TYPE EXCHANGER
31.
BY-PASS
32.
AIR PRESSURE SWITCH
33.
FAN
34.
FLUE SAFETY THERMOSTAT
35.
BOILER DRAING TAP
36.
D.H.W. CYLINDER TEMPERATURE
(90°)+PRESSURE (7 BAR) SAFETY VALVE
COMPONENTS INSIDE THE INSTRUMENT PANEL
MAIN PRINTED CIRCUIT BOARD (P.C.B.)
TEMPERATURE INDICATOR P.C.B.
17
16
8
30
11
13 26 25
16
17
32
18
19
12
30
14
21 12
6
25
26
13
12
21
7
8
6
22
4
11
33
3
5
27
15
29
28
1
23
31
20
36
37
23
14
31
20
37
36
27
24
15
2
22
1
34
19
1
28
Summary of Contents for RMA
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