Installation and Commissioning Guide
Classic 2 Outdoor Units
Installation and Commissioning Guide - Classic 2 Split Ducted Outdoor Unit
Doc. No.0525-073 Ver. 8 210414
43
19. Refrigerant Charging
•
The units detailed on this guide are pre-charged with R-410A refrigerant. Should there be a need to add or remove
some refrigerant, it is recommended to follow the charging method explained below.
•
Never allow R-410A refrigerant to vent into the atmosphere. It is an offence to release refrigerant in Australia. Always
reclaim refrigerant using equipment and container dedicated for R-410A system use only.
•
All work must be carried out in accordance with Australia and New Zealand refrigerant handling code of practice.
•
Only qualified personnel are allowed to perform any work described in this guide and specifically work related to
addition or removal of refrigerant.
•
R-410A refrigerant must always be charged in liquid state.
•
Only during the compressor running condition can the system be charged through the suction service port on the
compressor suction line.
•
Changes in refrigerant charge must be noted to a label that is fixed to the unit for future reference.
CAUTION
R-410A refrigerant has POE oil that rapidly absorbs moisture. The maximum time any system can be opened to atmosphere is 15
minutes.
Refrigerant Charge Details (R-410A)
Model
CRA100S
CRA130S
CCA130S
CRA130T
CRA150S
CCA150S
CRA150T
CRA170S
CCA170S
CRA170T
CCA170T
CRA200T
CCA200T
CRA230T
CCA230T
Refrigerant Type
R-410A
R-410A
R-410A
R-410A
R-410A
R-410A
R-410A
R-410A
R-410A
Factory Charge
gms
4175
5450
5250
4650
4650
6650
7350
7450
7600
Pre- charged Length
m
10
15
15
15
15
15
15
15
10
Additional Refrigerant
per charge
g/m
50
50
50
50
50
50
50
50
(1)
/100
100
Field Piping Sizing
(mm)
Liq.
3/8"
(9.52)
3/8"
(9.52)
3/8"
(9.52)
3/8"
(9.52)
3/8"
(9.52)
3/8"
(9.52)
3/8"
(9.52)
3/8"
(9.52)
1/2
(12.7)
1/2"
(12.7)
Gas
5/8"
(15.88)
3/4"
(19.05)
3/4"
(19.05)
3/4"
(19.05)
3/4"
(19.05)
3/4"
(19.05)
3/4"
(19.05)
7/8"
(22.22)
7/8"
(22.22)
1"
(25.4)
NOTE
(1)
50grams per meter is only applicable if 3/8” liquid field pipe is used (for field pipe length between 0-20m).
Charging Method: Subcooling and Superheat
Parameters:
LLT
= Liquid Line Temperature
SLT
= Suction Line Temperature
SCT
= Saturated Condensing Temperature
SST
= Saturated Suction Temperature
Cooling and Heating Operation:
Adjust the refrigerant charge to obtain the correct superheat and subcooling for optimal performance as follows:
1. Ensure that air filters are fitted and total system airflows are achieved. (Air filters are not supplied with the unit, it is
the responsibility of the installing contractor to provide and fit adequate return air and fresh air filters).
2. Connect service gauges to the service valves.
