U.M. 15 WH 20 WH 25 WH
mm 14 16 18
A
OUT
IN
C
B
EN / 35
Hydraulic connections
The engineer is responsible for choosing the right water
lines and their size, in accordance with good installation
practices and the applicable laws, keeping in mind that
under-sized pipelines lead to poor system operation.
To make the connections:
- position the water lines
- tighten the connections using the "wrench against
wrench" method
- check for any fluid loss
- apply a lining to the connections (use proper insulating
material)
The hydraulic lines and fittings must be thermally insulated.
Avoid partial insulation of the pipes.
Avoid over-tightening the pipes to avoid damage to the
insulation.
To ensure water tightness of the threaded connections,
use hemp and green paste; the use of teflon tape is
recommended if you have poured anti-freeze liquid in the
water circuit.
Carefully check that the insulation is tight, in order to
prevent the formation and dripping of condensate.
Note: Always provide an electrically controlled valve
on the machine or upstream that interrupts the water
flow when the setpoint is reached.
Pipeline diameter
The fan coil is equipped with a 3-way diverter valve with
thermo-electric motor.
Connect the pipeline to the delivery and return lines as
shown in the figure, with the delivery line at the top;
Comply with the requirements for electrical connections,
as described in para. "Wiring" on pag. 39.
A fan coil
B electric cable entry hole
C thermoelectric motor
IN water inlet pipe fitting
OUT water outlet pipe fitting
3-way diverter valve unit with thermo-electric motor
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