Daikin VRV IV W+ Series Installer And User Reference Manual page 114

19 | Electrical installation
Installer and user reference guide
114
In case of a multi outdoor unit system, install one or more flow switches depending
on the installation of the water system so that water flow is guaranteed under
every condition.
NOTICE
If the flow switch is installed in a variable water flow system, take into account the
inertia of the water flow. If a variable water flow system is used, the flow switch
control should be linked to the compressor operation using the multifunction output
terminal "b".
Failure to do so will result in unintended "forced thermo off" conditions.
Example:
X3M
X2M
a Relay (normally closed) (field supply)
b Flow switch (field supply)
Multifunction outputs
To monitor the outdoor unit operation or trigger field supplied equipment
connected to the outdoor unit, this RWEYQ*T9, series is equipped with 5 output
contacts.
General contact specifications: 220 V AC, 3 mA-0.5 A.
To connect these output signals, choose the applicable contacts in the X3M
terminal in the table below:
X3M
Terminal Function
a Error on remote controller
b Compressor operation
c Heating operation
d Cooling operation
e Water pump operation request
X2M
1 2 3 4 5 6 7 8 9 10
0 -
+
TW1 TW2
10 IN OUT
b
X3M
a
a
b
c
d
e
X3M
a
YLW
ORG
RED
b
BRN
c BLU
BLU
WHT
d
WHT
e BLK
BLK
YLW
ORG
RED
BRN
BLU
BLU
WHT
WHT
BLK
BLK
RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452191-1B – 2020.10