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Idiomas disponibles
Idiomas disponibles
8
ACCESSORIES
8.1
2- OR 3-WAY MOTOR-DRIVEN VALVE KITS
B
WARNING: The installation of a valve kit on the fan coil unit
is mandatory FWI-A.
The kit is made up of:
Ū Brass 2- or 3-way valve with 4 connections with built-in by-
pass, maximum operating pressure 16 bar.
Ū Electrothermal actuator with 230 V or 24 V power supply,
ON/OFF (or modulating) function, total opening time 3 min-
utes.
Ū Hydraulic kit with O-ring for connection with the exchanger
and paper gasket for connection with the valve
Ū Brackets for fastening the hydraulic kit on the side of the unit
in order to ensure stability during transport if the valves are
already installed.
Unit
FWI02ATN, FWI03ATN, FWI04ATN (2 pipes)
FWI06ATN, FWI07ATN, FWI08ATN (2 pipes)
Unit
FWI02AFN, FWI04AFN (4 pipes)
FWI06AFN, FWI08AFN (4 pipes)
Unit
FWI02ATN, FWI03ATN, FWI04ATN (2 pipes)
FWI06ATN, FWI07ATN, FWI08ATN (2 pipes)
Unit
FWI02AFN, FWI04AFN (4 pipes)
FWI06AFN, FWI08AFN (4 pipes)
8.2
PRESSURE-INDEPENDENT MOTOR-DRIVEN 2-WAY VALVE KIT
B
WARNING: The installation of a valve kit on the fan coil unit
is mandatory FWI-A.
The pressure-independent 2-way valve kit consists of:
Ū 2-way valve with maximum operating pressure of 16 bar.
Ū Electrothermal actuator with 230 V or 24 V power supply, ON/
OFF (or modulating) function, total opening time 3 minutes.
Unit
FWI02ATN, FWI03ATN, FWI04ATN (2 pipes)
FWI06ATN, FWI07ATN, FWI08ATN (2 pipes)
Unit
FWI02AFN, FWI04AFN (4 pipes)
FWI06AFN, FWI08AFN (4 pipes)
8.3
AUXILIARY WATER DRIP TRAY FOR COLLECTING CONDENSATE FROM THE CONTROL VALVES
The auxiliary water drip tray is supplied with the base unit to-
gether with two fastening screws.
Its function is to collect the condensate generated by the control
valves and to convey it inside the main condensate drip tray of
the unit. (Fig.15 , Fig.16 )
32
FWI-AT/AF
C
The valve kits are shown in the figures from page: p. 112.
Pressure drops of the valve/hydraulic kit assembly are calculated
using the following formula:
Where:
ΔP
Q
W
K
V
table
Valve type
Connection
3-way
3/4'' M
3-way
3/4'' M
Cooling
Valve type
Connection
KVS direct way
3-way
3/4'' M
2,5
3-way
3/4'' M
4
Valve type
Connection
2-way
3/4'' M
2-way
3/4'' M
Cooling
Valve type
Connection
2-way
3/4'' M
2-way
3/4'' M
Ū Hydraulic kit with O-ring for connection with the exchanger
Ū Brackets for fastening the hydraulic kit on the side of the unit
The
page: p. 116, p. 117, p. 116, and p. 117.
Valve type
Connection
2-way
3/4'' M
2-way
1 1/4 '' M
Cooling
Valve type
Connection
2-way
3/4'' M
2-way
1 1/4 '' M
NOTE:
for units FWI-A 02-03-04 it is necessary to install the
3-way valves inclined so as to comply with the space con-
straint regarding the height of the base unit.
∆P
= (Q
/ K
)²
W
W
V
pressure drop in bar
W
water flow rate in m³/h
water flow rate coefficient of the valve obtained from the
Kvs straight
2,5
4
Heating
Kvs by-pass
Connection
1,6
3/4'' M
1,6
3/4'' M
KVS
2,8
4
Heating
KVS
Connection
2,8
3/4'' M
4
3/4'' M
and paper gasket for connection with the valve.
in order to ensure stability during transport if the valves are
already installed.
valve
kits
are
shown
Δp min [kPa]
16
20
Kvs by-pass
1,6
1,6
KVS direct way
Kvs by-pass
2,5
1,6
2,5
1,6
KVS
2,8
2,8
in
the
figures
on
Δp min [kPa]
32
20
Heating
Connection
Δp min [kPa]
3/4'' M
16
1'' M
16
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