Installation Manual
Wall hung storage boiler – Cod. 99944NA – November 2002
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31
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LIMITER
The boiler is equipped with a variable flow limiter at the cold water inlet. The flow limiter
can be adjusted by turning the screw (see fig.2 pos.C) in order to obtain the correct flow
rate of domestic hot water for the specific boiler output.
FLOWSWITCH
This device gives precedence to domestic hot water and is fitted to boilers which supply
instantaneous hot water (see fig. 1, item B fig. 2). It allows conversion to hot water even
with a minimum hot water demand (2 litres/min.), using an electromagnetic principle with
electrical switching by means of a relay. The device is made of non-toxic, corrosion-proof
ZYTEL 101 L plastic material which has type approval with non-toxic characteristics and
is unaffected by hard water. In addition, a filter is fitted before the flowswitch and at the
cold water inlet which eliminates any water impurities. These features guarantee that the
flowswitch operation is highly efficient.
BY-PASS
All boilers are fitted with a by-pass. This element is essential in the following cases:
if a two-way zone valve is installed
if thermostat valves are installed in the radiators.
To adjust the by-pass proceed as follows (see fig. 2 pos.A): fit the screwdriver to the
plastic screw of the by-pass, bearing in mind that when the slot of the screw is horizontal
the by-pass is totally open, allowing all the water to pass, while when it is vertical the by-
pass is totally closed. For partial by-pass flows, use the adjuster screw.
KEY
1.
FRAME
2.
FLUE HOOD – ROOM SEALED COMBUSTION
CHAMBER
3.
COMBUSTION CHAMBER
4.
ROOM SEALED CHAMBER COVER
5.
ROOM SEALED CHAMBER BACK
6.
HEAT EXCHANGER Mod. 24.000
7.
MULTIGAS BURNER WITH 13 RAMPS
8.
HEATING SAFETY THERMOSTAT
9.
ELECTRONIC GAS VALVE VK4105
10.
GAS PRESSURE MODULATOR
11.
ELECTRONIC IGNITION BOARD
12.
EXPANSION VESSEL
13.
3-SPEED CIRCULATION PUMP WITH AIR VENT
14.
AUTOMATIC AIR VENT
15.
HEATING CIRCUIT 3 bar PRESSURE RELIEF VALVE
16.
DRAINING TAP
17.
WATER PRESSURE GAUGE
18.
WATER PRESSURE SWITCH
19.
HEATING SENSOR
20.
HOT WATER SENSOR
21.
3-WAY DIVERTER VALVE
22.
FLOWSWITCH CONNECTION WITH FLOW LIMITER
23.
ELECTRONIC FLOWSWITCH
24.
25 LITRE WATER STORAGE TANK
25.
ANODE CONTROL VALVE
26.
ANODE
27.
PLATE TYPE EXCHANGER
28.
BY-PASS
29.
AIR PRESSURE SWITCH
30.
FAN
31.
BOILER DRAING TAP
32.
7 ATE PRESSURE RELIEF VALVE (HOT WATER)
Flowswitch
C
B
A
Fig. 2
Fig. 1
Содержание Rmas 24 e
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