Daikin HYDROCUBE EWWQ014KBW1N, Руководство по установке, Страница: 6 / 60

Installation manual
4
EWWQ014~064KBW1N
Packaged water-cooled water chillers
D-EIMHP00908-17EU
P
IPING INSULATION
The complete water circuit, inclusive all piping, must be insulated to
prevent condensation and reduction of the cooling capacity.
Protect the water piping against water freezing during winter period
(e.g. by using a glycol solution or heatertape).
F
IELD WIRING
Parts table
F1,2,3 .....................Main fuses for the unit
H3P ........................Indication lamp alarm
H4P, H5P ................Indication lamp operation compressor circuit 1,
circuit 2
PE ..........................Main earth terminal
S7S ........................Remote cooling/heating change-over valve or
dual setpoint
S9S ........................Remote start/stop switch or dual setpoint
- - -..........................Field wiring
Power circuit and cable requirements
1 The electrical power supply to the unit must 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.
Connection of the water-cooled water chiller power
supply
1 Using the appropriate cable, connect the power circuit to the N,
L1, L2 and L3 terminals of the unit (cable section 2.5~10 mm
2
).
2 Connect the earth conductor (yellow/green) to the earthing
terminal PE.
Point for attention regarding quality of the public
electric power supply
■
This equipment complies with EN/IEC 61000-3-11
(1)
provided
that the system impedance Z
sys
is less than or equal to Z
max
at
the interface point between the user's supply and the public
system. It is the responsibility of the installer or user of the
equipment to ensure, by consultation with the distribution
network operator if necessary, that the equipment is connected
only to a supply with a system impedance Z
sys
less than or
equal to Z
max
.
■
Only for EWWQ014~064: Equipment complying with
EN/IEC 61000-3-12
(2)
Interconnection cables
■
Voltage free contacts
The PCB 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.
■
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.
B
EFORE STARTING
The water pressure should not exceed the maximum
working pressure of 10 bar.
NOTE
Provide adequate safeguards in the water circuit to
make sure that the water pressure will never exceed
the maximum allowable working pressure.
All field wiring and components must be installed by a
licensed electrician and must comply with relevant Euro-
pean 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.
Switch off the main isolator switch before making any
connections (switch off the circuit breaker, remove or
switch off the fuses).
(1) European/International Technical Standard setting the limits for voltage
changes, voltage fluctuations and flicker in public low-voltage supply
systems for equipment with rated current
≤
75 A.
Z
max
(
Ω
)
EWWQ014 0.28
EWWQ025 0.23
EWWQ033 0.21
EWWQ049 0.22
EWWQ064 0.20
(2) European/International Technical Standard setting the limits for harmonic
currents produced by equipment connected to public low-voltage systems
with input current >16 A and
≤
75 A per phase.
The unit should not be started, not even for a very short
period of time, before the following pre-commissioning
checklist is filled out completely.
tick
✓
when
checked standard steps to go through before starting the unit
■
1
Check for external damage.
■
2 Install main fuses, earth leak detector and main switch.
Recommended fuses: aM according to IEC standard 269-2.
Refer to the wiring diagram for size.
■
3 Supply the main voltage and check if it is within the allowable
±10% limits of the nameplate rating.
The electrical main power supply must 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.
Refer to the wiring diagram, terminals N, L1, L2 and L3.
■
4 Supply water to the evaporator and verify if waterflow is within
the limits as given in the table under "Water charge, flow and
quality" on page 3.
■
5 The piping must be completely purged. See also chapter
"Checking the water circuit" on page 2.
■
6 Connect the flowswitch and pumpcontact, so that the unit
can only come in operation when the waterpumps are running
and the waterflow is sufficient. Make sure a water filter is
installed before the water inlet of the unit.
■
7
Connect the optional field wiring for pumps start-stop.
■
8
Connect the optional field wiring for remote control.