Radiant RBS 24 Installation And Maintenance Manual - page 21
Installation Manual
MAIN COMPONENTS
KEY
1.
HEAT EXCHANGER
2.
CIRCULATION PUMP WITH AIR VENT
3.
ELECTRONIC GAS VALVE VK4105
4.
DRAINING TAP
5.
EXPANSION VESSEL
6.
HEATING CIRCUIT 3 bar PRESSURE RELIEF
VALVE
7.
MULTIGAS BURNER
8.
HEATING SENSOR
9.
WATER PRESSURE SWITCH
10.
ELECTRONIC FLOWSWITCH
11.
FLOW LIMITER
12.
HOT WATER SENSOR
13.
HEATING SAFETY THERMOSTAT
14.
FLUE HOOD
15.
ROOM SEALED CHAMBER BACK
16.
AIR PRESSURE SWITCH
17.
FAN
18.
TRANSFORMER
19.
WATER PRESSURE GAUGE
20.
IGNITION ELECTRODE
21.
FLAME IONISATION ELECTRODE
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 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. It allows
conversion to hot water even with a minimum hot water demand (min. 2 litres), 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:
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.
DIFFERENTIAL AIR PRESSURE SWITCH FOR FAN CONTROL
To guarantee maximum safety in flue exhaust, a differential pressure switch is installed on room-sealed boilers and on forced
draught boilers. This pressure switch automatically controls perfect functioning of the fan and the passage of both external air and
exhaust flue pipes.
COMBI – TG05A039.B0305
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