Installation Manual
37
ENGLISH
Refrigerant piping installation
◆
The amount of Refrigerant
The calculation of the additional charge should take into account the length of pipe.
Product Charge(kg(lb))
Additional charge (kg(lb))
=
+
+
+
+
+
+
=
+
x 0.354(kg/m)
→
0.237 lb/ft
x 0.266(kg/m)
→
0.178 lb/ft
x 0.173(kg/m)
→
0.116 lb/ft
x 0.118(kg/m)
→
0.079 lb/ft
x 0.061(kg/m)
→
0.041 lb/ft
x 0.022(kg/m)
→
0.015 lb/ft
CF(kg(lb))
(Correction Factor)
If a negative result is obtained from
the calculation, no refrigerant needs
to be added.
A
A
B
B
CAUTION
Total liquid pipe (m(ft.)): Ø22.2mm(7/8inch)
Total liquid pipe (m(ft.)): Ø19.05mm(3/4inch)
Total liquid pipe (m(ft.)): Ø15.88mm(5/8inch)
Total liquid pipe (m(ft.)): Ø12.7mm(1/2inch)
Total liquid pipe (m(ft.)): Ø9.52mm(3/8inch)
Total liquid pipe (m(ft.)): Ø6.35mm(1/4inch)
Total amount(kg(lb))
B
B
B
B
B
A
B
C
X
b
a
c
d
3
4
5
2
1
e
Outdoor Unit
Indoor Unit
A : ø9.52(3/8), 40m(131ft)
B : ø9.52(3/8), 20m(65.6ft)
C : ø9.52(3/8), 20m65.6ft)
Ex
10HP
Additional charge = A*0.041 + B*0.041 + C*0.041
+(a+b+c+d+e)*0.015 + CF
= 40*0.041+20*0.041+65.6*0.041
+ (32.8*5)*0.015 + (0)(CF)
= 7.61(lb)
a : ø6.35(1/4), 10m(32.8ft)
b : ø6.35(1/4), 10m(32.8ft)
c : ø6.35(1/4), 10m(32.8ft)
d : ø6.35(1/4), 10m(32.8ft)
e : ø6.35(1/4), 10m(32.8ft)
• 460V
HP
8
10
12
14
16
18
20
22
24
26
28
30
32
• 208/230V
HP
8
10
12
16
18
20
22
24
Product Charge
kg(lbs)
8(17.6)
8(17.6)
8(17.6)
8+8(17.6+17.6) 8+8(17.6+17.6) 8+8(17.6+17.6) 8+8(17.6+17.6) 8+8(17.6+17.6)
CF
kg(lbs)
-1(-2.2)
0(0)
1(2.2)
-2(-4.4)
-1(-2.2)
0(0)
1(2.2)
2(4.4)
Product Charge kg(lbs)
CF
kg(lbs)
8
(17.6)
8
(17.6)
8
(17.6)
8
(17.6)
8
(17.6)
8+8
(17.6+17.6)
8+8
(17.6+17.6)
8+8
(17.6+17.6)
8+8
(17.6+17.6)
8+8
(17.6+17.6)
8+8
(17.6+17.6)
8+8
(17.6+17.6)
8+8
(17.6+17.6)
-1
(-2.2)
0
(0)
1
(2.2)
2
(4.4)
3
(6.6)
-1
(-2.2)
0
(0)
1
(2.2)
2
(4.4)
3
(6.6)
4
(8.8)
5
(11.0)
6
(13.2)
WARNING
Regulation for refrigerant leakage
: the amount of refrigerant leakage should satisfy the following equation for human safety.
❐
If the above equation can not be satisfied, then follow the following steps.
- Selection of air conditioning system: select one of the next
1. Installation of effective opening part
2. Reconfirmation of Outdoor Unit capacity and piping length
3. Reduction of the amount of refrigerant
4. Installation of 2 or more security device (alarm for gas leakage)
- Change Indoor Unit type
: installation position should be over 2m(6.6ft) from the floor (Wall mounted type
→
Cassette type)
- Adoption of ventilation system
: choose ordinary ventilation system or building ventilation system
- Limitation in piping work
: Prepare for earthquake and thermal stress
WARNING
Refer to model information since the CF Value of correction factor differs depending on model.
Total amount of refrigerant in the system
0.44 (kg / m
3
)(0. 028(lb/ft
3
))
Volume of the room at which Indoor Unit of the least capacity is installed
