Calculation Steps - Bosch Climate 5000 Series Installation Instructions Manual

9.4 Calculation Steps

Step1: Calculate the "Estimated" refrigerant pre-charge amount.
Please note this value is only used to calculate the additional refrigerant
charge amount.
 Estimated Pre-charge Amount = Standard Refrigerant Pipe Length *
0.16oz/ft. (15g/m)
Step2: Calculate the required charge amount for each zone
(Refer to Table 8 for Indoor unit liquid line diameter)
 If the Zone 1 Indoor unit has 3/8inch liquid line diameter:
Zone 1 Charge Amount = Zone 1 Refrigerant Pipe Length * 0.32oz/ft (30g/m)
 If the Zone 2 Indoor unit has 1/4 inch liquid line diameter:
Zone 2 Charge Amount = Zone 2 Refrigerant Pipe Length * 0.16oz/ft.
(15g/m)
 Total zone charge amount = Zone 1 charge amount + Zone 2 charge
amount + Zone 3 charge amount + ... up to 5 zones.
Step3: Calculate the additional refrigerant needed
 Additional Refrigerant Amount = Total Zone Charge Amount - Estimated
Pre-charge Amount
For example:
One 36K ODU (BMS500-AAM036-1CSXHC) paired with below Indoor units.
—
One 9K wall mounted unit with 30ft refrigerant pipe
—
One 18K Cassette unit with 30ft refrigerant pipe.
—
One 24K wall mounted unit with 50ft refrigerant pipe.
1. Step1: Calculate the "Estimated" refrigerant charge. Please note this value
is only used to calculate the additional refrigerant charge amount.
Estimated Refrigerant Charge Amount = 98ft * 0.16oz/ft. = 15.68oz
2. Step2: Calculate the required charge amount for each zone. Refer to table 8
for Indoor unit liquid line size

Zone 1: 24K wall mounted Indoor unit
—
Zone 1 Charge Amount = 50ft * 0.32oz/ft. = 16oz

Zone 2: 18K Cassette Indoor unit
—
Zone 2 Charge Amount = 30ft * 0.16oz/ft. = 4.8oz

Zone 3: 9K wall mounted Indoor unit
—
Zone 3 Charge Amount = 30ft * 0.16oz/ft. = 4.8oz

Total Zone Charge Amount = 16oz + 4.8oz + 4.8oz = 25.6oz
3. Step3: Calculate the additional refrigerant needed
Additional Refrigerant Amount = 25.6oz – 15.68oz = 9.92oz
Bosch Climate 5000 Series Multi Zone Ductless Air Conditioner / Heat Pump (06.2022)
Installation Instructions
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