EDUS39-605
Installation
Installation of Outdoor Units
52
•
After the vacuum drying is finished, charge the additional
refrigerant in its liquid state through the liquid stop valve
service port. Be sure you have taken the following precau-
tions:
1.
Check that gas and liquid stop valves are closed.
2.
Charge the specified weight of refrigerant.
•
Make sure to use installation tools you exclusively use on
R-410A installations to withstand the pressure and to pre-
vent foreign materials from mixing into the system.
•
If the outdoor unit is not in operation and the total amount
cannot be charged, use the following procedures for addi-
tional refrigerant charge:
PROCEDURES FOR CHARGING ADDITONAL REFRIGER-
ANT:
One outdoor unit installed:
(Refer to figure 12, page 38)
1.
Pressure reducing valve
2.
Nitrogen
3.
Tank
4.
Siphon system
5.
Measuring instrument
6.
Vacuum pump
7.
Valve A
8.
Valve B
9.
Suction gas line
10.
Liquid line
11.
Discharge gas line
12.
Stop valve service port
13.
Charge hose
14.
Indoor unit
15.
BS unit
16.
Outdoor unit
17.
Dotted lines represent field supply piping
18.
Oil-equalizing line
19.
Valve C
20.
To indoor unit
Additional Refrigerant Charge Procedure:
To learn the system settings for additional refrigerant charg-
ing, refer to the [
Service Precaution
] label attached on the
back of the electric box lid in the outdoor unit.
1.
Fully open the suction gas line and discharge gas line
stop valves. Be sure that the liquid line stop valve and
valve A and valve B are left fully closed. and start the
additional refrigerant charge operation.
2.
After the system is charged with a specified amount of
refrigerant, press the confirmation button (BS3) on the
PC-board (A1P) in the outdoor unit to stop the additional
refrigerant charge operation.
3.
Immediately restore the stop valve to the following sta-
tus. The test operation cannot be performed properly if
the stop valve is not correct.
Multiple outdoor units installed (Refer to figure 12, page
384)
Additional Refrigerant Charge Procedure:
To learn the system settings for additional refrigerant charg-
ing, refer to the [
Service Precaution
] label attached on the
back of the electric box lid in the outdoor unit.
1.
Fully open the suction gas line and discharge gas line
stop valve (liquid line stop valve and valves A, B and C
above must be left fully closed), and start the additional
refrigerant charge operation.
2.
After the system is charged with a specified amount of
refrigerant, press the confirmation button (BS3) on the
P-board (A1P) in the outdoor unit to stop the additional
refrigerant charge operation.
3.
Immediately restore the stop valve to the following sta-
tus. as the test operation cannot be performed properly
if the stop valve is not correct:
NOTE
•
If the refrigerant cylinder is siphonal, set it upright while
charging additional refrigerant.
10.1 FIELD WIRING
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 following wiring diagrams and the instructions: 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 upon product startup and is designed to stop the
product if an abnormality occurs. -
•
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 a reversed phase occurs during a momentary blackout
and the power goes on and off while the product is oper-
ating, attach a local reversed-phase protection circuit.
Running the product in reversed phase can break the
compressor and other parts.
•
Use copper conductors only.
•
When using the adaptor for sequential start, refer to
Sec-
tion 7-3, Examples
.
•
For connection wiring to outdoor-outdoor transmission F1-
F2, outdoor-indoor transmission F1-F2, refer to
Section 7-
3, Examples
.
•
Refer to the Central Remote Controller’s Installation Man-
ual for its connection wiring.
•
Use insulated wire for the power cord.
Power circuit and cable requirements
A power circuit (see table below) must be provided for connec-
tion of the unit. This circuit must be protected with the required
safety devices such as a main switch, a slow-blow fuse on
each phase, and an ground leak detector.
Liquid line
stop valve
Suction gas line
stop valve
Discharge gas line
stop valve
Oil-equalizing
line stop valve
Open
Open
Open
Closed (default sta-
tus before delivery)
Liquid line
stop valve
Suction gas line
stop valve
Discharge gas
line stop valve
Oil-equalizing line
stop valve
Open
Open
Open
Open
Phase and
frequency
Voltage
Recommended
fuses
Transmission
line selection
REYQ72/96MTJU
φ
3, 60Hz
208-230V
60A
AWG 18
REYQ144/168/
192MTJU
φ
3, 60Hz
208-230V
60A + 60A
AWG 18
