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To connect the steel pipes to the system, ensure they
are aligned and supported to avoid excess strain on
the unit. If the system is filled with water, check all
fitting seals.
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After ending the hydraulic connections, make sure
there are no leaks Insulate the valve using the shell,
fix it by means of the clips and make sure that all cold
parts are insulated (see figure).
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For 4-pipe hot water, repeat all the operations with
gas adaptors, as per the table on the previous page.
CAUTION:
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When the system is filled with water, verify all couplings for tightness.
The manufacturer does not accept responsibility for the tightness of the field - installed valve
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assembly and this is not tested in the factory. He declines any responsibility for non-functioning of
these assemblies and for damage due to dripping.
6.3 Operation of the thermo-electric valve
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This 2 or 3-way valve is of the OPEN/CLOSE type
with very slow stroke. It is not a modulating valve so
it has no PTC. This valve is driven, as a sensible
element, by the ambient thermostat of the "cassette"
unit.
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The 2-way valve is normally closed to the coil with no
powered actuator side.
The 3-way valve is normally closed to the coil with no
powered actuator side while is open to the bypass
way side.
When the room temperature does not satisfy the
thermostat, the valve opens after about 3 minutes
about to allow water to circulate in the coil.
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If the room temperature satisfies the thermostat or if
the electric power has been switched off, the valve is
closed after about 3 minutes towards the coil and is
opened towards the bypass.
6.4 Connecting the condensate evacuation pipe to the drain tray
A condensate tray is supplied with a 5/8" exterior diameter copper drain hole, which must be connected to the main evacuation
pipe, to ensure that the condensed water will drain properly from the tray.
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Connecting condensate piping to sewage system
drain with appropriate trap.
Trap height must be calculated according to the unit
discharge head in order to allow sufficient and
continuous water evacuation (See figure).
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To avoid horizontal sections or curves of condensate
drain piping. The slope must be greater than 2% .
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To avoid ascending sections of condensate drain
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If an emergency occurs, the valve may be manually
opened, removing the electric head, unscrewing the
ring nut. When the emergency ends, remember to
reset the valve to automatic operation, repositioning
the electric head; failure to do this can result in
condensate formation due the water pipes, even if
the unit is switched off.
piping. These may only be used near the unit with a
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