SYSVRF2 IM

22
Fig.5-17
③
③
①
①
②
②
R410A
refrigerant tank
Weighing scale
Pressure gauge
Yellow hose
Blue hose
Red hose
Master unit Slave unit Slave unit
Field piping
Gas pipe stop valve
Liquid pipe stop valve
Service port
Table. 6-1
6. ELECTRICAL WIRING
CAUTION
6.1 General
6.2 Power supply wiring
NOTE
Select a power cord for these models separately according to
relevant standard.
The wiring diameter and the length in the table indicate the
condition that the voltage drop range is within 2%. If the
length exceeds the above figure, please select the wire
diameter according to the relevant standard.
This equipment complies with:
EN/IEC 61000-3-12 provided that the short-circuit power Ssc is
greater than or equal to the minimum Ssc value where the user’s
supply and public system interface.
EN/IEC 61000-3-12 = European/International Technical Standard
sets the limits for harmonic currents produced by equipment
connected to public low-voltage systems with input current >
16A and ≤ 75A per phase.
The installer or user of the equipment must ensure, by consulting
with the distribution network operator if necessary, that the
equipment is connected only to a supply with a short-circuit power
Ssc greater than or equal to the minimum Ssc value.
The European/International Technical Standard sets the limits for
harmonic currents produced by equipment connected to public
low-voltage systems with an input current of > 16A and ≤ 75A per
phase.
European/International Technical Standard setting the limits for
voltage changes, voltage fluctuations and flicker in public low-
voltage supply systems for equipment with a rated current of ≤ 75A.
Power supply wiring design and installation should adhere to the
following requirements:
Outdoor unit
power supply
Leakage
protector
Manual
switch
Outdoor unit power supply wiring
Fig.6-1
8HP
Minimum Ssc value(KVA)
18HP
16HP
14HP
12HP
10HP
5207
6183
6023
5863
5687
5447
Separate power supplies should be provided for the indoor units
and outdoor units.
For outdoor unit power wire sizing and circuit breaker sizing,
refer to Table 6-2 “Electrical Characteristics”.
5.Open the valve where the yellow hose meets the pressure gauge,
and open the refrigerant tank slightly to let the refrigerant
eliminate the air. Caution: open the tank slowly to avoid freezing
your hand.
6. avoid freezing your hand.
7. Open the three valves on the pressure gauge to begin charging
refrigerant.
8.When the amount charged reaches R (kg), close the three valves.
If the amount charged has not reached R (kg) but no additional
refrigerant can be charged, close the three valves on the pressure
gauge, run the outdoor units in cooling mode, and then open the
yellow and blue valves. Continue charging until the full R (kg) of
refrigerant has been charged, then close the yellow and blue
valves. Note: Before running the system, be sure to complete all
the pre-commissioning checks and be sure to open all stop valves
as running the system with the stop valves closed would damage
the compressor.
All the indoor units in a system (i.e. all the indoor units
connected to the same set of outdoor units) should be tied into
the same power circuit with the same power supply, overcurrent
and residual current protection (leakage protection) and manual
switch, as shown in Figure 6-1. Do not install separate
protectors or manual switches for each indoor unit. Powering on
and shutting down all indoor units in a system should be done
simultaneously. The reason for this is that if an indoor unit that
is running were to suddenly power off whilst the other indoor
units continued running, the evaporator of the powered-off unit
would freeze since refrigerant would continue flowing to that
unit (its expansion valve would still be open) but its fan would
have stopped. The indoor units that remain running would not
get sufficient refrigerant so their performance remain running
would not get sufficient refrigerant so their performance would
suffer. Additionally, liquid refrigerant returning directly to the
compressor from the powered-off unit would cause liquid
hammering, potentially damaging the compressor.
All installation and wiring must be carried out by competent and
suitably qualified, certified and accredited professionals and in
accordance with all applicable legislation.
Electrical systems should be grounded in accordance with all
applicable legislation.
Overcurrent circuit breakers and residual-current circuit
breakers (ground fault circuit interrupters) should be used in
accordance with all applicable legislation.
Wiring patterns shown in this manual are general connection
guides only and are not intended for, or to include all details for,
any specific installation.
The refrigerant piping, power wiring and communication wiring
are typically run in parallel. However the communication wiring
should not be bound together with the refrigerant piping or
power wiring. To prevent signal interference, the power wiring
and communication wiring should not be run in the same
conduit. If the power supply is less than 10A, a not be run in the
same conduit. If the power supply is less than 10A, a wiring
conduits should be maintained; if the power supply is in the
range 10A to 50A then a separation of at least 500mm should
be maintained.