R(Y)(P)71~125B7
Split System air conditioners
4PW10931-1B
Installation manual
6
R22:
Complete charging of the refrigerant
When the entire refrigerant pipe length is within 30 meters (for
R407C) and 7.5
meters (for R22), charge the refrigerant in
accordance with the amount mentioned in the nameplate, and when
the pipe length exceeds 30 meters (for R407C) and 7.5 meters (for
R22), the charging amount mentioned in the nameplate and that
required for additional charging are to be totalled as the net charging
amount.
Precaution for pumping-down operation
The outdoor unit is equipped with a low-pressure switch to protect the
compressor. Take the following steps to perform the pumping-down
operation.
1
Start the fan operation with the remote controller.
Confirm that stop valves both on the liquid and gas side are open.
2
Push the pumping-down button on the PC board of the outdoor
unit during more than 5 seconds.
Compressor and outdoor fan will start operation automatically.
If step 2 is performed before step 1, then the indoor fan may
automatically start running. Please pay attention to this.
3
Continue operation for 2 min. until operation condition stabilizes.
4
Close the stop valve on the liquid side securely. (See
"Operating
stop valve: see figure 6" on page 4
)
Insecure closing of the valve may result in burning of the
compressor.
5
When the low-pressure switch is activated, the unit stops
working. At this time, close the stop valve on the gas side.
This is the end of pumping-down operation. After pumping-down
operation, the remote controller can show the following pattern:
-
"U4"
-
blank screen
-
indoor fan operates for about 30 seconds
even when ON button on the remote controller is pressed, and it will
not operate. Turn off the main power supply switch and turn it on
again in need of operation.
E
LECTRICAL
WIRING
WORK
■
All wiring must be performed by an authorized electrician.
■
All components procured on the site and all electric construction
should comply with the applicable local and national codes.
■
Be sure to use a dedicated power circuit.
■
Do not share a common source with other equipment.
■
Fix cables so that cables do not make contact with the pipes
(especially on high pressure side).
■
For W1 and T1 models
Make sure to connect power supply cables in normal phase. If
connected in reverse phase, the remote controller of indoor unit
indicates "U1" and the equipment cannot operate. Change any
two of the three power supply cables (L1, L2, L3) to correct
phase.
If the contact in the magnetic switch should be forcibly turned on
while the equipment is inoperative, the compressor will burn out.
Never try to forcibly turn on the contact.
■
Never squeeze bundled cables into a unit.
■
When cables are routed from the unit, a protection sleeve for the
conduits (PG-insertions) can be inserted at the installation hole.
(See figure 9)
■
Follow the electric wiring diagram for electrical wiring works.
■
Grounding resistance should be according to national
regulations.
Wiring of power supply and the units
Refer to the installation manual attached to the indoor unit for wiring
of indoor units, etc.
Attach an earth leak detector and fuse to the power supply line.
(See
figure 10)
RY71~125
G = (L1-7.5 m) x 0.05 + L2 x A + L3 x A
R71~125
G = (L1-7.5 m) x 0.03 + L2 x A + L3 x A
Branched pipe
A
RY71~125
Ø 9.5
0.05 kg/m
Ø 6.4
0.03 kg/m
R71~125
Ø 9.5
0.03 kg/m
Ø 6.4
0.02 kg/m
Never short-circuit the low-pressure switch in this
operation.
In order to avoid electric shock, please put the insulation
sheet as follows.
(See figure 8)
1
Switch box
2
PCB
3
Pump down button
4
Insulation sheet
5
Tape
A
Inside
B
Outside
1
Wire
2
Bush
3
Nut
4
Frame
5
Hose
I
Pair
II
Twin
III
Triple
M
Master
S
Slave
1
Earth leak detector
2
Fuse
3
Remote controller
Power supply
Model
Field
fuse
Wire type
(1)
(1) Only in protected pipes, use HO7RN-F when protected pipes are not
used.
Size
Wire type of
wiring between
the units
R(Y)(P)71V1
32 A
H05VV-U3G
Wiring size
must comply
with the
applicable
local
and national
code
H05VV-U4G2.5
R(Y)(P)100V1
40 A
H05VV-U3G
H05VV-U4G2.5
R(Y)(P)71W1
16 A
H05VV-U5G
H05VV-U4G2.5
R(Y)(P)100W1
16 A
H05VV-U5G
H05VV-U4G2.5
R(Y)(P)125W1
20 A
H05VV-U5G
H05VV-U4G2.5
R(Y)(P)71T1
20 A
H05VV-U4G
H05VV-U4G2.5
R(Y)(P)100T1
32 A
H05VV-U4G
H05VV-U4G2.5
R(Y)(P)125T1
32 A
H05VV-U4G
H05VV-U4G2.5
