Power Circuit And Cable Requirements - Daikin R-410A Installation Manual

EDUS39-605
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)
Pressure reducing valve
1.
Nitrogen
2.
Tank
3.
Siphon system
4.
Measuring instrument
5.
Vacuum pump
6.
Valve A
7.
Valve B
8.
Suction gas line
9.
Liquid line
10.
Discharge gas line
11.
Stop valve service port
12.
Charge hose
13.
Indoor unit
14.
BS unit
15.
Outdoor unit
16.
Dotted lines represent field supply piping
17.
Oil-equalizing line
18.
Valve C
19.
To indoor unit
20.
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.
Liquid line Suction gas line
stop valve stop valve
Open Open
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.
Installation of Outdoor Units
Discharge gas line Oil-equalizing
stop valve line stop valve
Closed (default sta-
Open
tus before delivery)
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:
Liquid line Suction gas line
stop valve stop valve
Open Open
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.
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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.
Phase and
frequency
φ 3, 60Hz
REYQ72/96MTJU
REYQ144/168/
φ 3, 60Hz
192MTJU
Installation
Discharge gas Oil-equalizing line
line stop valve stop valve
Open Open
Recommended Transmission
Voltage
fuses line selection
208-230V 60A AWG 18
208-230V 60A + 60A AWG 18
52