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Connect the power source to X2M terminals 1 and 3 (respect the polarity).
X2M
a
+
X2M
2~9 V DC
–
a
Valve/pump
b
Power supply
NOTE
Make sure to connect a flow switch to your RWEQ∗T-Series
water-cooled system. Running the system with a flow rate below
the minimum requirement can result in damage of the system.
Interlock
It is mandatory to connect a flow switch to the interlock circuit of the outside
unit. Running the system with a flow rate below the minimum requirement
can result in damage of the system. The flow switch should be installed in
the main water circuit between the plate heat exchanger and the closed
valve. Select a flow switch contact of at least 15 V DC, 1 mA.
Connect the flow switch to: X2M terminals 5 and 6.
Failure to do so will result in HJ error.
In case of a multi outside 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.
NOTE
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".
Furthermore, when the field setting [2-24-3] is activated, if
there is a delay after water pump signal is turned on and
flow switch is closed, use a compressor operation signal
relay with a time delay and set the time delay accordingly.
Failure to do so will result in unintended "forced thermo off"
conditions.
NOTE
In case of two or more flow switches installed with field
setting [2-24-3] activated (see "7.2.8 Mode 2: Field
settings" on page 38), be sure to use the flow switch that
close the contact in 5 seconds after the water pump
operation request signal turned on.
Failure to do so will result in malfunction.
RWEQ96~432TAYD∗ + RWEQ96~432TATJ∗
VRV W T-Series water-cooled system air conditioner
1 2 3 4 5 6 7 8 9 10
INTER
TW1
TW2
LOCK
IN
OUT
+ –
b
12 V DC
6 Checking of device and installation conditions
Example:
X3M
X2M
X
Relay (close contact when no compressor operation signal)
(field supply)
Y
Flow switch (open contact when no flow signal) (field
supply)
Multifunction outputs
To monitor the outside unit operation or trigger field supplied
equipment connected to the outside unit, this RWEQ*T, 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 of the master outside unit in the table below:
X3M
Terminal
Function
a
Error on remote controller
b
Compressor operation
c
Heating operation
d
Cooling operation
e
Valve/Pump operation request
6
Checking of device and
installation conditions
Be sure to check the followings.
For those doing electrical work
1 Make sure there is no faulty transmission wiring or loosening of
a nut.
See "5.8.5 To connect the transmission wiring" on page 33.
2 Make sure there is no faulty power wiring or loosening of a nut.
See "5.8.7 To connect the power supply" on page 34.
3 Has the insulation of the main power circuit deteriorated?
Measure the insulation and check the insulation is above
regular value in accordance with relevant local and national
regulations.
X3M
1
YLW
a
2
ORG
X
3
RED
b
4
BRN
BLU
5
c
BLU
6
7
WHT
d
WHT
8
BLK
9
e
10
BLK
X2M
1 2 3 4 5 6 7 8 9 10
-
0
+
TW1
TW2
10
IN
OUT
X3M
1
a
YLW
2
ORG
3
RED
b
BRN
4
c
5
BLU
6
BLU
WHT
7
d
8
WHT
9
e
BLK
10
BLK
Installation manual
Y
35
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