Daikin FWH-AT Serie Manual De Instalación, Uso Y Mantenimiento página 39

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 FWH-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
FWH02ATN,FWH03ATN, FWH04ATN (2 pipes)
FWH06ATN,FWH07ATN, FWH08ATN (2 pipes)
Unit
FWH02AFN,FWH03AFN, FWH04AFN (4 pipes)
FWH06AFN,FWH08AFN (4 pipes)
Unit
FWH02ATN,FWH03ATN, FWH04ATN (2 pipes)
FWH06ATN,FWH07ATN, FWH08ATN (2 pipes)
Unit
FWH02AFN,FWH03AFN, FWH04AFN (4 pipes)
FWH06AFN,FWH08AFN (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 FWH-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
FWH02ATN,FWH03ATN, FWH04ATN (2 pipes)
FWH06ATN,FWH07ATN, FWH08ATN (2 pipes)
Unit
FWH02AFN,FWH03AFN, FWH04AFN (4 pipes)
FWH06AFN,FWH08AFN (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. (FIGURE 15, FIGURE 16)
C
The valve kits are shown in the figures from page: p. 205.
Pressure drops of the valve/hydraulic kit assembly are calculated
using the following formula:
∆P
Where:
∆P
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 valve kits are shown in the figures on page: p. 209
and p. 210.
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 FWH-A it is necessary to install the 3-way
valves inclined so as to comply with the space constraint re-
garding the height of the base unit.
= (Q / K ) 2
W W V
= pressure drop in bar
W
= water flow rate in m 3 /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
and paper gasket for connection with the valve.
in order to ensure stability during transport if the valves are
already installed.
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
4
Heating
Connection KVS
3/4'' M 2,8
3/4'' M 2,8
Δp min [kPa]
32
20
Heating
Connection Δp min [kPa]
3/4'' M 16
1'' M 16
WC66000644-05
39