ACQVARIA
TECHnICAL MAnuAL
38
11.1 2- OR 3-WAY MOTOR-DRIVEN VALVE KITS
WARNING:
The installation of a valve kit on the fan coil unit
is mandatory ACQVARIA.
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.
NOTE:
for units AQ10-AQ20 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.
The valve kits are shown in the figures from page: p. 38.
Pressure drops of the valve/hydraulic kit assembly are calculated
using the following formula:
∆P
W
= (Q
W
/ K
V
)
2
Where:
∆P
W
= pressure drop in kg/cm
2
Q
W
= water flow rate in m
3
/h
K
V
= water flow rate coefficient of the valve obtained from
the table
Unit
Valve type
Connection
Kvs straight
Kvs by-pass
AQ10Q0B0, AQ20Q0B0 (2 pipes)
3-way
3/4’’ M
2,5
1,6
AQ40Q0B0,AQ50Q0B0, AQ60Q0B0 (2 pipes)
3-way
3/4’’ M
4
1,6
Cooling
Heating
Unit
Valve type
Connection
KVS direct way
Kvs by-pass
Connection
KVS direct way
Kvs by-pass
AQ10Q0BB, AQ20Q0BB (4 pipes)
3-way
3/4’’ M
2,5
1,6
3/4’’ M
2,5
1,6
AQ40Q0BB, AQ60Q0BB (4 pipes)
3-way
3/4’’ M
4
1,6
3/4’’ M
2,5
1,6
Unit
Valve type
Connection
KVS
AQ10Q0B0, AQ20Q0B0 (2 pipes)
2-way
3/4’’ M
2,8
AQ40Q0B0, AQ50Q0B0, AQ60Q0B0 (2
pipes)
2-way
3/4’’ M
4
Cooling
Heating
Unit
Valve type
Connection
KVS
Connection
KVS
AQ10Q0BB, AQ20Q0BB (4 pipes)
2-way
3/4’’ M
2,8
3/4’’ M
2,8
AQ40Q0BB, AQ60Q0BB (4 pipes)
2-way
3/4’’ M
4
3/4’’ M
2,8
» 2-way valve kit - 2 pipes, AQ 10-20
1
Water outlet
2
Water inlet
NOTE: The actuator is not shown.
1
3
2