Daikin EWYA004D2V3P Installer's Reference Manual page 62

8 | Piping installation
Installer reference guide
62
If...
Connected
NOT connected and...
The return flow temperature is >15°C
The return flow temperature is ≤15°C
INFORMATION
In critical processes, or in rooms with a high heat load, extra water might be
required.
NOTICE
Never use less water than the minimum water volume. It may cause the unit to
malfunction.
NOTICE
When circulation in each space heating/cooling loop is controlled by remotely
controlled valves, it is important that the minimum water volume is guaranteed,
even if all of the valves are closed or the overpressure bypass valve is installed in
front of the space heating/cooling loop.
d
a
a User interface (delivered as accessory)
b Individual room thermostat (option)
c Differential pressure bypass valve (field supply)
d Shut-off valve (delivered as accessory)
M1...3 Individual motorised valve to control each loop (field supply)
Maximum water volume
NOTICE
The maximum water volume depends on whether glycol is added to the water
circuit. For more information on the addition of glycol, refer to
water circuit against
Use the following graph to determine the maximum water volume for the
calculated pre-pressure.
Then the minimum water volume
M1 M2
b b b
4
freezing" [ 67].
is...
15 l
20 l
50 l
c
M3
"8.2.4 To protect the
EWAA004~008D + EWYA004~008D
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P688013-1B – 2022.09