Parker Hyperchill Plus-E Manuel D'utilisation page 27

3.4 Electrical circuit
3.4.1 Checks and connections
!
Before carrying out any operation on the electrical system, make sure that the appliance is
disconnected from the electrical power supply.
All electrical connections must comply with the applicable regulations in force in the country of instal-
lation.
Initial checks
1. The power supply voltage and frequency must correspond to the values stamped on the chiller
nameplate. The power supply characteristics must not deviate, even for brief periods, from the
tolerance limits indicated on the electrical diagram , which are +/- 10% for the voltage; +/- 1% for
the frequency.
2. The power supply must be symmetrical (the effective voltages and the phase angles of consecuti-
ve phases must be equal). The maximum permissible voltage imbalance is 2%
Connection
1. The electrical power supply must be connected to the chiller using a 4-wire cable, comprising 3
phase conductors and an earth conductor, with no neutral. For minimum cable section, see par. 7.
2. Pass the cable through the cable entry on the rear panel of the machine and connect the phase
and neutral to the terminals of the main isolator switch (QS); connect the earth wire to the earth
terminal (PE).
3. Ensure that supply cable has at its source protection against direct contact of at least IP2X or
IPXXB.
4. On the supply line to the chiller, install a residual-current circuit breaker with a trip rating of
(RCCB - IDn = 0.3A), with the current rating indicated in the reference electrical diagram, and with
a short circuit current rating appropriate to the short circuit fault current existing in the machine
installation area.
The nominal current In of the magnetic circuit breaker must be equal to the FLA with an interven-
tion curve type D.
5. Max. grid impedance value = 0.274 ohm.
Subsequent checks
Check that the machine and the auxiliary equipment are earthed and protected against short circuit
and/or overload.
!
Once the unit has been connected and the upstream main switch closed (thereby connecting
the power supply to the machine), the voltage in the electrical circuit will reach dangerous levels.
Maximum caution is required!
3.4.2 General alarm
All the chillers are equipped with an alarm signalling system (see electrical diagram), comprised of a
switching free contact in a terminal block: this may be used for the connection of an external audible
or visual alarm, or used to provide an input signal for a logic control system such as a PLC.
3.4.3 ON/OFF remote
All the chillers can be connected to a remote ON/OFF control (par.7.):
- To enable the remote rif. n.16387
- As reference variable ON/OFF rif.n.8996
Note: do not enable together "Sup" and "Re" .
See the electrical diagram for the connection of the remote ON-OFF (par.7.)
English
3.5 Water-cooled version (W)
In the water-cooled version, the chillers require a water circuit that takes the cold water to condenser.
The water version chiller is equipped with a pressure regulating valve at the condenser inlet, whose
function is to regulate the water fl ow in order to always obtain optimum condensation.
Preliminary checks
If the water supply to the condenser is by means of a closed circuit,perform all the preliminary checks
listed for the main water circuit (para. 3.3.1).
Connection
1. It is advisable to equip the cooling water circuit with shutoff valves, enabling the machine to be
cut out in case of maintenance.
2. Connect the water delivery/return pipes to the special connections located on the back of the unit.
3. If the cooling water is "expendable" it is advisable to equip the circuit with a fi lter at the condenser
inlet, in order to reduce the risk of the surfaces becoming dirtied.
4. If the circuit is of the closed type, make sure it is fi lled with water and the air properly vented.
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