Discharge From Pressure Relief Devices; Field Wiring; Parts Table; Power Circuit And Cable Requirements - Daikin EWWD120J-SS Installations- Betriebs Und Wartungshandbuch

14. DISCHARGE FROM PRESSURE
RELIEF DEVICES
Discharge of the refrigerant into installation area has to be in
accordance with local regulations. If required it is possible to
connect a 1" pipe to each pressure relief valve on the
condenser and ½" pipe to each pressure relief valve on the
evaporator.
Cross section and length of the discharge line must comply with
local codes.

15. FIELD WIRING

All field wiring and components must be installed by a
licensed electrician and must comply with relevant
European and national regulations.
The field wiring must be carried out in accordance with
the wiring diagram supplied with the unit and the
instructions given below.
Be sure to use a dedicated power circuit. Never use a
power supply shared by another appliance.
NOTE Verify on the wiring diagram all electrical actions
mentioned below, in order to understand the
operation of the unit more deeply.

15.1. Parts table

F1,2 ............................... Main fuses for the unit
L1, 2, 3 .......................... Main supply terminals
PE .................................. Main earth terminal
S6S ................................ Setpoint override
FS .................................. Flow switch
Q10 ................................ Main isolator switch
--- ................................... Field wiring
15.2. Power circuit and cable
requirements
1. The electrical power supply to the unit should be arranged
so that it can be switched on or off independently of the
electrical supply to other items of the plant and equipment
in general.
2. A power circuit must be provided for connection of the
unit. This circuit must be protected with the required
safety devices, i.e., a circuit breaker, a slow blow fuse on
each phase and an earth leak detector. Recommended
fuses are mentioned on the wiring diagram supplied with
the unit.
Switch off the main isolator switch before making any
connections (switch off the circuit breaker, remove or
switch off the fuses).
15.3. Connection of the water-cooled
water chiller power supply
1. Using the appropriate cable, connect the power circuit to
the L1, L2 and L3 terminals of the unit.
2. Connect the earth conductor (yellow/green) to the
earthing terminal PE.

15.4. Interconnection cables

A pump interlock contact must be installed in series with
the contact of the flow switch(es) to prevent the unit
from operating without water flow. A terminal is provided
in the switch box for the electrical connection of the
interlock contact.
In both cases, all units must be equipped with an Interlock
contact!
NOTE Normally the unit will not operate if there is no
flow thanks to the standard installed flow switch.
But as to have a double safety, you must install
the pump interlock contact in series with the
contact of the flow switch.
Operating the unit without flow will result in very
severe damage to the unit (freezing of the
evaporator).
•
Voltage free contacts
The controller is provided with some voltage free contacts
to indicate the status of the unit. These voltage free
contacts can be wired as described on the wiring
diagram. The maximum allowable current is 2 A.
•
Remote inputs
Besides the voltage free contacts, there are also
possibilities to install remote inputs.
They can be installed as shown on the wiring diagram.
15.5. Periodic obligatory checks and
starting up of appliances under
pressure
The units are included in category III of the classification
established by the European Directive 2014/68/EU (PED). For
chiller belonging to this category, some local regulations require
a periodic inspection by an authorized agency. Please check
with your local requirements.

15.6. Disposal

The unit is made of metal, plastic, and electronic parts.
All these parts must be disposed of in accordance with the local
regulations in terms of disposal.
Lead batteries must be collected and sent to specific refuse
collection centres.
Oil must be collected and sent to specific refuse collection
centres.
D - EIMWC01008-06_02EU - 15/182