Daikin EWLD120MBYNN, Installation Instruction

Page: 10 / 16

Installation manual
7
EWLD120~540MBYNN
Condenserless water-cooled water chillers
4PW22686-1
• Remote dual setpoint switch:
The remote dual setpoint switch should only be connected to the
chiller defined as
.
However in case the master drops out because of e.g. a power
supply failure, it might be interesting to have the dual temperature
switch installed to the other units as well.
• Note:
For wiring examples, refer to the separate manual “
Installation
examples for a DICN configuration
”.
Connection and setup of a DICN system
(See Annex I , "Installation examples for a DICN configuration" on
page 10 )
For a system with chillers in a DICN configuration, the chillers have to
be connected as shown in the figure below.
Make the connection as shown on the wiring diagram using an
AWG20/22 shielded cable, made up of a twisted pair plus shield.
Pay attention to the polarity! TX+ on one chiller must be connected to
TX+ on another chiller. The same for TX– and GND.
Setting the adresses on the digital controller
Set the addresses on the PCB by means of DIP-switches according
to the drawing below:
Where to find the DIP-switches of the digital controller
Important
Be sure to attach — in case of common leaving water control — the
optional temperature sensor.
Cable for remote digital controller
See remote digital controller in the operation manual.
1 A remote digital controller can be connected to the PCB inside
the unit by means of a 6-ray cable and a connector located on
the rear side of the remote digital controller in case you prefer to
operate the unit from a distance. You are allowed to use a cable
of up to 600 metres (EWLD120~260) or 300 metres
(EWLD340~540). Specifications of the cable: 6-ray telephone
cable with a maximum cable resistance of 0.1
Ω
/m.
2 For units in a DICN configuration, the digital controllers of the
units can be installed remotely at a distance of up to 50 metres
by using a 6-ray telephone cable with a maximum cable
resistance of 0.1
Ω
/m.
Setting the adresses on the remote digital controller
When a remote digital controller is used, the adress has to be set by
means of DIP-switches according to the drawing below:
Where to find the DIP-switches of the remote digital controller
Master Slave 1 Slave 2 Slave 3
PCB
address
Any unit can be master, slave 1, slave 2 or slave 3.
1 2 3 4
1 2 3 4 5 6
OFF
1 2 3 4 5 6
OFF
1 2 3 4 5 6
OFF
1 2 3 4 5 6
OFF
Master Slave 1 Slave 2 Slave 3
Remote digital
controller address
Any unit can be master, slave 1, slave 2, slave 3...
To avoid damage to the controllers liquid crystals during
winter time, do not shut off the main power supply.
1 2 3 4 5 6
OFF
1 2 3 4 5 6
OFF
1 2 3 4 5 6
OFF
1 2 3 4 5 6
OFF