Bedienungsanleitung Unical MODULEX EXT 250 (Seite 21 von 56) (Englisch)

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Instructions for the installer

3.9 - ADDITIONAL SAFETY AND CONTROL DEVICES ACCORDING TO THE ITALIAN LAW

CERTIFICATION OF THE ADDITIONAL SAFETY DEVICES:

DISPOSITIVI DI SICUREZZA

1 On-off gas valve: a device which has the function of cutting

off the gas supply when the water temperature reaches the

max. predetermined value. The sensible element has to be

installed as nearest as possible to the generator (ﬂow pipe)

at a distance which has to be < 500 mm and must not be

able to be cut-off. Not supplied by Unical.

Pressure relief valve: it has the function of discharging in the

atmosphere the ﬂuid contained in the generator when this

has, for whatever motive, reached the maximum working

pressure. Not supplied by Unical.

2a Visible drain funnel. Not supplied by Unical.

PROTECTIVE DEVICES

10 Overheat thermostat: it has the function of shutting down

the generator if the safety thermostat ﬁtted in the boiler

malfunctions. It must be calibrated to a value of < 100°C,

which MUST not be changed.

15 Minimum pressure switch: it has the function of shutting

down the generator In case of low pressure (can be calibra-

ted from 0.5 to 1.7 bar). It must be able to be reset manually.

16 Additional plug G1’’:

18 Safety pressure switch: it has the function of shutting down

the generator if it reaches the maximum working pressure

(can be calibrated from 1 to 5 bar).

CONTROL DEVICES

13 (Pressure Indicator - not provided by Unical) with (12)

and shock tube (11) tap-port gauge: Indicates the actual

pressure existing in the generator must be calibrated in

“bar”, having the full scale of the maximum pressure rela-

ted operation and be provided with a three-way valve with

manometer control

14 Thermometer: it indicates the effective water temperature

contained in the generator. It must be graduated in degrees

Celsius with a temperature scale not exceeding 120°C.

17 Inspection pocket: approved for inserting the control ther-

mometer

19 Plug G1 ¼’’: for the safety valves connection

3 Calibrated expansion vessel: it permits the absorption of

the increase in volume of the system’s water following an

increase in temperature; The pressure must not exceed the

safety valve set pressure. Not supplied by Unical.

8 Y ﬁlter

7 Modulating pump (Not supplied in kit ISPELS)

5 Mixing bottle (Not supplied in kit ISPELS)

4 Automatic air vent. Not supplied by Unical

6 Drain cock. Not supplied by Unical.

kit ISPESL

MODULEX 100-150: 00361980

MODULEX 200-250: 00361981

MODULEX 300-350: 00333556

SAFETY

VALVE

VISIBLE

DRAIN

FUNNEL

Apressurereliefvalvemustbettedontheowpipe,within0,5

m from the boiler. It must be dimensioned for the capacity of the

boiler and must comply to the regulations in force,

WARNING!

Please remember that it is forbidden to inter-

pose, between the boiler and the pressure

relief valve, any type of cutting-off device.

Moreover it is recommended to use cutting-

off valves which do not exceed the maximum

allowable operating pressure.

WARNING!

In correspondence to the heating pressure

relief valve foresee the installation of a

discharge pipe with a funnel and a siphon

which lead to an adequate drainage. The

drainage has to be controllable by sight.

If this precaution is not made, an eventual

intervention of the pressure relief valve could

cause injury to persons, animals or damage

to property. The manufacturer shall not be

held liable for any injury and/or damage.

See the Unical catalogue and the price list to

identify the most convenient mixing header and

primary circuit.

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