7 Configuration
Installer and user reference guide
35
RWEYQ8~1 RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452191-1 – 2017.04
The control line of the valve/pump should be connected to the X2M
connector in the electrical switchbox. To connect the valve/pump to
the outdoor unit, also provide a separate 12 V DC power supply
(with an output power of at least 50 mW) to the X2M connector.
Connect the valve/pump to: X2M terminals 2 and 3.
Connect the power source to X2M terminals 1 and 3 (respect the
polarity).
BLK
INTER
LOCK
TW1
IN
TW2
OUT
WHT
BLU
BLU
BLU
YLW
ORG
RED
BRN
+ –
1 2 3 4 5 6 7 8 9 10
X2M
+
–
2~10 V DC
12 V DC
a
b
X2M
a
Valve/pump
b
Power supply
NOTICE
Make sure to connect a flow switch to your water-cooled
VRV IV 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
outdoor 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.
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
X3M
YLW
a
b
c
d
e
ORG
RED
BRN
BLU
BLU
WHT
WHT
BLK
BLK
BLK
TW1
IN
TW2
OUT
WHT
BLU
BLU
BLU
YLW
ORG
RED
BRN
0
10
+ -
1 2 3 4 5 6 7 8 9 10
X2M
b
a
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 mA.
To connect these output signals, choose the applicable contacts in
the X3M terminal in the table below:
X3M
X3M
YLW
a
b
c
d
e
ORG
RED
BRN
BLU
BLU
WHT
WHT
BLK
BLK
Terminal
Function
a
Error on remote controller
b
Compressor operation
c
Heating operation
d
Cooling operation
e
Water pump operation request
7
Configuration
7.1
Overview: Configuration
This chapter describes what you have to do and know to configure
the system after it is installed.
It contains information about:
▪ Making field settings
▪ Energy saving and optimum operation
▪ Using the leak detection function
INFORMATION
It is important that all information in this chapter is read
sequentially by the installer and that the system is
configured as applicable.
DANGER: RISK OF ELECTROCUTION
7.2
Making field settings
7.2.1
About making field settings
To continue the configuration of the VRV IV heat recovery system, it
is required to give some input to the PCB of the unit. This chapter
will describe how manual input is possible by operating the push
buttons on the PCB and reading the feedback from the 7‑segment
displays.
Making settings is done via the master outdoor unit.
Next to making field settings it is also possible to confirm the current
operation parameters of the unit.
Push buttons
Performing special actions (automatic refrigerant charge, test run,
etc.) and making field settings (demand operation, low noise, etc.)
happens by way of operating the push buttons.
See also:
