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INSTALLATION AND OPERATION MANUAL
30
11.5. CAUTION OF THE PRESSURE BY CHECK
JOINT
When the pressure is measured, use the check joint of gas stop valve (A),
and use the check joint of liquid piping (B) in the figure below.
At that time, connect the pressure gauge according to the following
table because of high pressure side and low pressure side changes by
operation mode.
Check Joint for Gas Stop Valve "A"
Check Joint for Piping "B"
Check Joint for Liquid Stop Valve "C"
NOTE:
Be careful that refrigerant and oil do not splash to the electrical parts
at removing the charge hoses.
The below figures show
examples of 3 and 5 HP
RAS-3HVRNME
11.6. REFRIGERANT CHARGING QUANTITY
Outdoor Units has been charged with refrigerant for
length. An additional refrigerant charged is required in systems with actual
ℓ
piping length longer than
(m).
1. Determine an additional refrigerant quantity according to the following
procedure, and charge it into the system.
2. Record the additional refrigerant quantity to facilitate service activities
thereafter.
CAUTION:
When charging refrigerant accurately measure refrigerant to be
charged.
Overcharging or undercharging of refrigerant can cause
compressor trouble
In case of actual piping length less than 5 m, consult your
distributor.
Outdoor unit Factory Refrigerant charge (Wo Kg) is the next:
”
O/U MODEL
Wo (Kg)
RAS-3HVRNME
RAS-4H(V)RNM1E
RAS-5H(V)RNM1E
RAS-6H(V)RNM1E
RAS-4HVRNS1E
RAS-5HVRNS1E
RAS-6HVRNS1E
PMML0197_r0_04-10.indb 30
Cooling
Heating
Operation
Operation
Low Pressure
High Pressure
High Pressure
Low Pressure
Exclussive for Vacuum Pump
and Refrigerant Charge
RAS-5H(V)RNM1E
ℓ
(m) of actual piping
Chargeless
Additional Charge
ℓ
Factor (P)
Length
(m)
2.4
30
0.04
3.9
30
0.06
3.8
30
0.06
3.8
30
0.06
2.8
20
0.04
2.9
30
0.06
2.9
30
0.06
a) Refrigerant shall be added if
shown in the table above.
Calculate the additional amount as follows:
RAS-4HVRNM1E
RCI-2.0FSN2E
L= A+B+C= 30+8+8= 46
ℓ:
- Chargeless Length
for 4HVRNM1E is 30 m according to the
table before.
- Additional Correction Value
the table above.
- Additional Charge amount
W= (L-ℓ) x P = (46-30) x 0.06 = 0.96 (kg)
W
b) Charge the amount
calculated by a)
c) Setting of Pipe Length DSW.
DSW2 setting will be required only when the refrigerant pipe length
is shorter than 5 m or longer than 30 m. Pipe length setting shall be
performed as shown below.
(The side in the table below shows the DSW location)
DSW2 on Outdoor PCB1
Factory setting
Factory setting
Pipe Length 5 m or
11.7. PUMP DOWN REFRIGERANT
When the refrigerant should be collected into the outdoor unit due to
indoor/outdoor unit relocation, collect the refrigerant as follows:
1. Attach the manifold gauge to the gas stop valve and the liquid stop
valve
2. Turn ON the power source
3. Set the DSW1-1 pin of the outdoor unit PCB at the "ON" side
for cooling operation. Close the liquid stop valve and collect the
refrigerant.
4. When the pressure at lower pressure side (gas stop valve) indicates
-0.01 MPa (-100 mmHg), perform the following procedures
immediately.
Close the gas stop valve.
−
Set the DSW1-1 pin at the "OFF" side (To stop the unit operation).
−
5. Turn OFF the power source.
CAUTION:
Measure the low pressure by the pressure gauge and keep it not to
decrease than -0.01 MPa. If the pressure is lower than -0.01 MPa,
the compressor may be faulty.
L
is longer than the chargeles length
RCI-2.0FSN2E
P
: for 4HVRNM1E, "0.06" according to
W
will be:
Factory setting
Pipe Length 30 m or
shorter
longer
08/07/2010 9:20:49
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