Installation manual
11
REYQ8~16M8W1B
VRVII System air conditioner
4PW23712-1
To avoid compressor breakdown. Do not charge the refrigerant
more than the specified amount.
■
This outdoor unit is factory charged with refrigerant and
depending on pipe sizes and pipe lengths some systems require
additional charging of refrigerant. (Refer to
"How to calculate the
additional refrigerant to be charged" on page 8
).
■
Make sure to use installation tools you exclusively use on
R-410A installations to withstand the pressure and to prevent
foreign materials from mixing into the system.
■
Charge the refrigerant to the liquid pipe in its liquid state. Since
R-410A is a mixed refrigerant, its composition changes if
charged in a state of gas and normal system operation would no
longer be assured.
■
Before filling, check whether the tank has a siphon attached or
not.
■
Determine the weight of refrigerant to be charged additionally
referring to the item "Additional refrigerant charge" in
"How to
calculate the additional refrigerant to be charged" on page 8
and
fill in the amount in the "Additional refrigerant charge label"
attached to the unit.
Charging while the outdoor unit is at a standstill
■
After the vacuum drying is finished, charge the additional
refrigerant in its liquid state through the liquid stop valve service
port taking into account following instructions:
-
Check that gas and liquid stop valves are closed.
-
Stop the compressor and charge the specified weight of
refrigerant.
Charging while the outdoor unit is operating
1
Completely open the suction and discharge gas line stop valves.
In case of a 18~48 type unit, completely open the oil pressure
equalizer stop valves as well.
Valve A + B (+ C in case of a 18~48 type unit) must be left fully
closed.
Make sure the liquid line stop valve is totally shut. If it is open,
the refrigerant cannot be charged.
Charge the additional refrigerant in its liquid state through the
service port of the liquid line stop valve.
2
While the unit is at a standstill and under setting mode 2 (refer to
8.2.
Checks before initial start-up
,
"Setting the mode" on
page 17
), set the required function A (additional refrigerant
charging operation) to
(ON). Then operation starts. The
blinking H2P led indicates test operation and the remote
controller indicates
(test operation) and
(external
control).
3
When the specified amount of refrigerant is charged, push the
button. Then operation stops.
■
The operation automatically stops within 30 minutes.
■
If the refrigerant charge cannot be finished within 30 minutes,
repeat step 2.
■
If the operation stops immediately after restart, there is a
possibility that the system is overcharged.
The refrigerant cannot be charged more than this amount.
4
After the refrigerant charge hose is removed, make sure to fully
open the liquid stop valve. Otherwise the piping may burst due to
blocked liquid.
5
After the refrigerant is charged, turn on the power for the indoor
units and for the outdoor unit.
7. F
IELD
WIRING
7.1.
Internal wiring - Parts table
Refer to the wiring diagram sticker on the unit. The abbreviations
used are listed below:
A1P-A7P................ Printed circuit board
BS1-5..................... Push button switch (mode, set, return, wiring
check, reset)
C1-4....................... Capacitor
DS1........................ Dip switch
E1HC~3HC............ Cranckcase heater
F1U........................ Fuse (250 V, 5 A, B)(A4P)
F1U,2U .................. Fuse (250 V, 10 A, B)(A1P)
F5U........................ Field fuse
H1P-8P .................. Light emitting diode (service monitor - orange)
HAP ....................... Pilot lamp (service monitor - green)
K1M~3M ................ Compressor contactor (M1C~M3C)
K1R-15R................ Magnetic relay
L1R ........................ Reactor
M1C,2C,3C ............ Motor (compressor)
M1F ....................... Motor (fan)
PS.......................... Switching power supply
Q1RP..................... Reverse phase detector
R1 .......................... Resistor (current limiting)
R3-4....................... Resistor
R10-R133 .............. Resistor (current sensor)
R1T........................ Thermistor (fin) (A2P)
R1T........................ Thermistor (air) (A1P)
R2T........................ Thermistor (suction)
R31T~33T ............. Thermistor (discharge)
How to fill a tank with a siphon attached
Fill with the tank upright.
There is a siphon tube inside, so there is no
need to turn the tank upside-down.
Other ways of filling the tank
Fill with the tank upside-down.
If the total refrigerant cannot be charged while the outdoor
unit is at a standstill, it is possible to charge the refrigerant
by operating the outdoor unit using the refrigerant charge
function (refer to
"Setting mode 2" on page 17
).
ON
BS3 RETURN
All field wiring and components must be installed by a
licensed electrician and must comply with relevant local
and national regulations.
The field wiring must be carried out in accordance with the
wiring diagrams and the instructions given below.
Be sure to use a dedicated power circuit. Never use a
power supply shared by another appliance.
This product's reversed phase protection detector only
works when the product started up.
The reversed phase protection detector is designed to stop
the product in the event of an abnormalities when the
product is started up.
Replace two of the three phases (L1, L2, and L3) during
reverse-phase protection circuit operation.
Reversed phase detection is not performed while the
product is operating.
If there exists the possibility of reversed phase after an
momentary black out and the power goes on and off while
the product is operating, attach a reversed phase
protection circuit locally. Running the product in reversed
phase can break the compressor and other parts.
