RXYSQ6P8Y1B9
VRVIII-S System air conditioner
4P357505-1 – 2013.08
Installation manual
15
HAP (A1P) ............. Light emitting diode (service monitor green)
HAP (A2P) ............. Light emitting diode (service monitor green)
K1M (A1P) ............. Magnetic contactor
K1R........................ Magnetic relay (Y1S)
K2R........................ Magnetic relay (Y2S)
K3R........................ Magnetic relay (Y3S)
K4R........................ Magnetic relay (E1HC)
K5R........................ Magnetic relay
K6R........................ Magnetic relay
L1R ........................ Reactor
M1C ....................... Motor (compressor)
M1F ....................... Motor (fan) (upper)
M2F ....................... Motor (fan) (lower)
PS.......................... Switching power supply
Q1DI ...................... Field earth leakage breaker (300 mA)
R1 (A1P)................ Resistor
R1 (A2P)................ Resistor
R2 (A2P)................ Resistor
R1T........................ Thermistor (air)
R2T........................ Thermistor (M1C discharge)
R3T........................ Thermistor (suction 1)
R4T........................ Thermistor (subcool)
R5T........................ Thermistor (suction 2)
R6T........................ Thermistor (heat exchanger)
R7T........................ Thermistor (liquid pipe 1)
R8T........................ Thermistor (liquid pipe 2)
R9T........................ Thermistor (power module)
S1NPH................... Pressure sensor (high)
S1NPL ................... Pressure sensor (low)
S1PH ..................... Pressure switch (high)
V1R........................ Power module
V2R, V3R............... Diode module
X1M ....................... Terminal strip (power supply)
X2M ....................... Terminal strip (control) (cool/heat selector)
Y1E........................ Electronic expansion valve (main)
Y3E........................ Electronic expansion valve (subcool)
Y1S........................ Solenoid valve (4 way valve)
Y2S........................ Solenoid valve (hot gas)
Y3S........................ Solenoid valve (unload circuit)
Z1C~Z4C............... Noise filter (ferrite core)
Z1F ........................ Noise filter (with surge absorber)
Z2F ........................ Noise filter
Cool/heat selector
S1S........................ Selector switch (fan/cool – heat)
S2S........................ Selector switch (cool – heat)
Connector of option adaptor
X37A...................... Connector (option adaptor power supply)
Notes
11.2.
Precautions on electrical wiring work
Before obtaining access to terminal devices, all supply circuits
must be interrupted.
Use only copper wires.
Do not turn on the main switch until all the wiring is completed.
Make sure that the main switch has a contact separation of at
least 3 mm in all poles.
Never squeeze bundled cables into a unit.
Fix cables so that cables do not make contact with the pipes
(especially on high pressure side).
Secure the electrical wiring with clamping material as shown in
figure 10 so that it does not come in contact with the piping,
particularly on the high-pressure side.
Make sure no external pressure is applied to the terminal
connectors.
When installing the earth leakage breaker make sure that it is
compatible with the inverter (resistant to high frequency
electrical noise) to avoid unnecessary opening of the earth
leakage breaker.
As this unit is equipped with an inverter, installing a phase
advancing capacitor not only will deteriorate power factor
improvement effect, but also may cause capacitor abnormal
heating accident due to high-frequency waves. Therefore, never
install a phase advancing capacitor.
Follow the "electrical wiring diagram" when carrying out any
electrical wiring.
Always ground wires. (In accordance with national regulations of
the pertinent country.)
Do not connect the ground wire to gas pipes, sewage pipes,
lightning rods, or telephone ground wires.
• Combustion gas pipes: can explode or catch fire if there is a
gas leak.
• Sewage pipes: no grounding effect is possible if hard plastic
piping is used.
• Telephone ground wires and lightning rods: dangerous when
struck by lightning due to abnormal rise in electrical potential
in the grounding.
This unit uses an inverter, and therefore generates noise, which
will have to be reduced to avoid interfering with other devices.
The outer casing of the product may take on an electrical charge
due to leaked electrical current, which will have to be discharged
with the grounding.
Make sure to connect power supply cables in normal phase. If
connected in reverse phase, the remote controller of the indoor
unit indicates "
U1
" and the equipment cannot operate. Change
any two of the three power supply cables (L1, L2, L3) to correct
phase.
11.3.
Connection example of total system wiring
For VRV indoor units: see figure 9
1
Power
2
Earth leakage breaker
3
Branch switch overcurrent breaker (fuse)
4
Ground
5
Remote controller
11.4.
Connecting power wire and transmission wires
Let the power wire (including ground wire) go through the power
outlet port on either the front, side or back of the outdoor unit.
Let the transmission wires go through the cable outlet port, pipe
outlet port or knock-out hole on either the front, side or back of
the outdoor unit. (See figure 10).
A
Rear direction
B
Lateral direction
C
Front direction
1
Power terminal block (X1M)
2
Control wiring between units
1
This wiring diagram only applies to the outdoor unit.
4
When using the option adaptor, refer to the installation
manual.
5
Refer to the wiring diagram sticker (on the back of the front
plate) for instructions on how to use BS1~BS5 and DS1-1,
DS1-2 switches.
6
Do not operate the unit by short-circuiting protection device
S1PH.
9
Refer to the installation manual for connection wiring to
indoor-outdoor transmission F1-F2.
10
When using the central control system, connect outdoor-
outdoor transmission F1-F2.
4P357505-1.book Page 15 Tuesday, September 10, 2013 7:59 AM
