Technical data

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Precision Air Conditioning
Precision Air Conditioning
46
Technical Manual : 6258867 F 07/2012
Design Data - Air Cooled Models
REFRIGERANT
CHARGING GUIDE
The following information can be used to estimate the refrigerant quantity required in a
split system installation.
The following table shows the refrigerant charge / circuit for the indoor and outdoor units.
Unit Refrigerant Charge
(Kg/Circuit)
Indoor Unit (IR) kg/Circuit Condenser (OR) kg/Circuit
Condensing
Unit (OR) kg/Circuit
(1)
V 9 - 16 A & X
2.1
C 11 - 15
2.1
CUS 3 - 4
1.5
V 19 - 23 A & X
3.8
C 20
2.3
CUS 5 - 6
2.4
V 25 A & X
4.6
C 25
3.1
CUS 6.5 - 7.5
3.6
V 23D - 31D A & X
2.7
C 35 - 45
6.1
CUS 8.5 - 12
4.8
V 35 A & X
4.1
CS 50
10.0
CUS 30D
9.0
V 41D & 50D A & X
4.1
V 45D & 55D A & X
6.1
V 65D - 80D A & X
6.7
V 90D A & X
8.0
(1) CUS3-4 models are delivered PRECHARGED with refrigerant.
The following table shows the refrigerant charge / metre for the liquid line, using R407C
and assuming liquid line temperature of 40°C.
Liquid Line Refrigerant
Charge (kg/m)
Liquid Line (m) kg/m
3/8” 0.05
1/2” 0.10
5/8” 0.16
3/4” 0.24
7/8” 0.33
1 1/8” 0.58
The pipe sizes/refrigerant charges quoted are for guidance only. It is the responsibility of
the installing contractor/site engineer to check the pipe sizes/refrigerant charge are correct
for each system installation and application.
Split systems may require additional oil which should be added to the low side of
each compressor.
IMPORTANT
Design should be in accordance with accepted refrigeration practice to ensure good oil
return to the compressor(s) under all normal operating conditions.
AIR COOLED