21
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 fitted on the flow 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.
Summary of Contents for MODULEX EXT 150
Page 1: ...E N G L I S H 100 150 200 250 300 350 INSTALLATION AND SERVICING INSTRUCTIONS MODULEX EXT...
Page 32: ...32 Instructions for the installer THERMOSTAT FBR 2 CONNECTION room sensor...
Page 33: ...33 Instructions for the installer MODULATING THERMOSTAT CONNECTIONS...
Page 35: ...35 Instructions for the installer...
Page 37: ...37 Instructions for the installer Sensor terminal assignments Terminal assignments BCM...
