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Leak test
1.
Evacuate the pipes and check vacuum. (No pressure increase for 1
minute.)
2.
Break the vacuum with a minimum of 2 bar of nitrogen.
3.
Conduct leak test by applying soap water, etc. to the connecting part
of the pipes.
4.
Discharge Nitrogen.
5.
Evacuate and check vacuum again.
6.
Open the stop valve and inject the refrigerant into the refrigerant pipe
and into the indoor unit.
7.
Leak test must satisfy EN 378-2.
C
HARGING REFRIGERANT
Important information regarding the refrigerant used
This product contains fluorinated greenhouse gases covered by the
Kyoto Protocol. Do not vent gases into the atmosphere.
Refrigerant type:
R407C
(1)
GWP
value:
1652.5
(1)
GWP = global warming potential
Please fill in with indelible ink,
the factory refrigerant charge of the product,
the additional refrigerant amount charged in the field and
+
the total refrigerant charge
on the refrigerant charge label supplied with the product.
The filled out label must be adhered in the proximity of the product
charging port (e.g. onto the inside of the service cover).
6
5
This unit requires additional charging of refrigerant according to the
length of pipe connected at the site. Concerning R407C refrigerant:
charge the refrigerant to the liquid pipe in its liquid state. Since
R407C is a mixed refrigerant, its composition changes if charged in a
state of gas and normal system operation would no longer be
assured.
Concerning L1~L7 (see tables below), refer to figures 2~5.
Additional charging of refrigerant
Find the correct amount of additional refrigerant to charge 'G' (kg)
using one of the following formulas.
If G<0: no addition is required.
R(Y)P200+250B8W1
Split System air conditioners
4PW23688-1B
1
factory refrigerant charge
4
of the product:
see unit name plate
1
2
additional refrigerant
amount charged in the
2
field
3
total refrigerant charge
3
4
Contains fluorinated
greenhouse gases
covered by the Kyoto
Protocol
5
outdoor unit
6
refrigerant cylinder and
manifold for charging
Pair system: refer to
figure 2
L1 (m)
one way length of liquid pipe
RP200
RP250
RYP200
RYP250
Simultaneous operation system
(Twin, Triple, Double Twin: refer to figures 2~5)
L1 (m)
one way length of main liquid pipe
L2~L7 (m) one way length of branched liquid pipes
RP200
G=(L1–30)x0.06+L2xA+L3xA+L4xA+L5xA+L6xA+L7xA
RP250
G=(L1–30)x0.09+L2xA+L3xA+L4xA+L5xA+L6xA+L7xA
RYP200
G=(L1–30)x0.10+L2xA+L3xA+L4xA+L5xA+L6xA+L7xA
RYP250
G=(L1–30)x0.14+L2xA+L3xA+L4xA+L5xA+L6xA+L7xA
Branched pipe
RP200+250
Ø9.5
Ø6.4
RYP200+250
Ø9.5
Complete charging of the refrigerant
When the entire refrigerant pipe length is within 30 m, charge the
refrigerant in accordance with the amount mentioned in the
nameplate and when the pipe length exceeds 30 m, the charging
amount mentioned in the nameplate and that required for additional
charging are to be totaled 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.
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
1
Switch box
2
PCB
3
Pump down button
4
Insulation sheet
5
Tape
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.
valve: refer to figure 7".)
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 sec.
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.
G=(L1–30)x0.06
G=(L1–30)x0.09
G=(L1–30)x0.10
G=(L1–30)x0.14
A
0.03 kg/m
0.03 kg/m
0.05 kg/m
9).
(See "Operating stop
Installation manual
5
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