D-EIMAC01207-15EN - 13/22
Simultaneous mono and three-phase loads and any
imbalance between phases can cause leakage to earth
of up to 150mA during the normal unit operations.
The protection systems for the power supply must be
designed based on the values mentioned above.
Wiring at the installation site
Wiring operations at the installation site and on
other components must be performed by an authorised
technician and must comply with current relevant
national and European laws.
On-site wiring must be carried out in compliance with
the wiring diagram supplied with the machine and the
instructions listed below.
Use a dedicated electric circuit. Never use a power
supply shared with other equipment.
NOTE
- Check all the operations listed below on the
wiring diagram in order to better understand how the
equipment works.
Component table:
F1, 2
Main appliance fuses
L1, 2, 3
Main power supply terminals
PE
Main earth terminal
FS
Flow
Switch
Q10
Main insulator switch
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On-site wiring
Electric circuit and wiring requirements
1. The power supply to the unit must be prepared
so that it can be turned on and off
independently from that of other system
components or other appliances in general.
2. Create an electrical circuit for connecting the
unit. This circuit must have protective and
safety devices fitted i.e. a main switch and a
fuse for each phase where required by
legislative requirements in the country of
installation as well as an earth leakage
detector.
Turn off the main insulator switch before
making any connections (turn off the switch, remove or
disable the fuses).
Connection of the unit power supply
Using suitable cable, connect the power circuit to
terminals L1, L2 and L3 on the electric panel.
WARNING: Never twist, pull or apply weight to the
main switch terminals. The power supply cables
must be supported by adequate systems.
The wires connected to the switch must comply with the
insulation distance and the distance of surface
insulation between the active conductors and the earth,
in accordance with IEC 61439-1, Table 1 and 2 and
local national laws.
The cables connected to the main switch must be
tightening using a torque wrench and complying with
the unified tightening values relative to the quality of the
screws of the washers and the nuts used.
Connect the earth wire (yellow/green) to the PE earth
terminal.
The cross section of the protective equipotential
conductor (earth conductor) must comply with Table 1
of EN 60204-1 below.
Cross-sectional area of
copper phase
conductors supplying
the equipment
S
mm2
Minimum cross-
sectional area of the
external protective
copper conductor
S
p mm2
S
≤ 16
16 <
S
≤ 35
S
> 35
S
16
S
/2
In any event, the protective equipotential conductor
(earth conductor) must have a cross section of no less
than 10 mm2, in compliance with Point 8.2.8 of the
same standard.
Interconnecting wires
The unit cannot operate without a flow of water
thanks to the flow switch However, for extra safety a
water pump status contact must be fitted in series with
the contact(s) of the flow switch(es) to prevent the unit
operating without the pump.
If the unit is operated with no flow of water very severe
damage can occur (evaporator freezing).
Clean contacts
The controller is fitted with various clean indicator
contacts These contacts can be wired as shown in
the wiring diagram. The maximum current allowed is
2 A.
Remote inputs
In addition to the clean contacts, it is also possible
to install remote inputs. For installation consult the
wiring diagram.
Before start-up
The unit must be started for the first time by
DAIKIN authorised personnel ONLY.
The unit must absolutely not be started, even for a very
short period of time, without having checked it in minute
detail filling out the following list at the same time.