AIREDALE R410A - Refrigerant Charge Calculation Procedures; System Refrigerant Charge Calculation; Liquid Line Charge Calculation

Installation
Calculation of System Refrigerant Charge (kg)
The system refrigerant charge can be calculated using the following equation:
SR = LR + IR + OR
Where:
SR = Total System Refrigerant Charge (kg)
LR = Total Liquid Line Refrigerant Charge. (As calculated from above)
IR = Indoor Unit Refrigerant Charge.
OR = Outdoor Unit Refrigerant Charge.
Example
Indoor Unit Model Ref. = SC12D023-X200-0
Outdoor Unit Model Ref = CR50 Condenser
Interconnecting Pipework = 10 metres
From the Refrigerant Pipe Sizing Guide, the
liquid line size given for pipework length of 10
metres is:0.09kg/m
SR = LR + IR + OR
LR = L x m
Where:
LR = 0.9 kg. (As calculated from above)
IR = 2.9 kg
OR = 4.9 kg
SR = 0.9+ 2.9 + 4.9
Calculation of Liquid Line Refrigerant Charge (kg)
The liquid line refrigerant charge can be calculated using the following equation:
LR = L x m
Where:
LR = Total Liquid Line Refrigerant charge (kg)
L = Length of Interconnecting pipework (metres)
m = Liquid Line Refrigerant charge / metre. Refer to Liquid Line
Refrigerant Charge (kg/m), above.
Where:
L = 10 metres
m = 0.09 kg/m (Liquid
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LR = 10 x 0.09 = 0.9kg
System Refrigerant Charge
Therefore
System Refrigerant
Charge
= 8.7kg / Circuit
SmartCool™ 16 - 60
Precision Air Conditioning
36 SmartCool Technical Manual 7525371 V1.2.0_03_2013
Installation