Model Selection And Capacity Calculation; Selection Procedure Of Indoor Unit And Outdoor Unit - Fujitsu AOU48RLXFZ Design & Technical Manual

Hybrid flex inverter system
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3.

MODEL SELECTION AND CAPACITY CALCULATION

3-1.
SELECTION PROCEDURE OF INDOOR UNIT AND
OUTDOOR UNIT
Please select indoor units and outdoor units and make the capacity of each indoor unit be
larger than cooling and heating load.
1 Calculate heat load of each room
2 Tentative selection of indoor units
3 Calculate the total cooling capacity or heating capacity of indoor units
The total cooling capacity or heating capacity of indoor units
= The sum of capacity of indoor units
x Capacity change rate by suction temperature of indoor unit
: Calculate by the value of the outdoor temperature 95°F when
cooling, 47°F when heating.
4 Tentative selection of outdoor unit
5 Calculate the Maximum cooling capacity or heating capacity of outdoor unit
The maximum cooling capacity or heating capacity of outdoor unit
= Capacity of outdoor unit calculated from total of indoor unit rated capacity with capacity table
x Capacity change rate by temperature conditions (Calculate by the value of indoor units
connecting capacity in 100%)
x Capacity change rate by indoor units connecting capacity : Calculate by the value of standard
temperature conditions (When indoor units connecting capacity is only 100% or more)
x Capacity change rate by refrigerant pipe length
x Capacity change rate by frosting (Only heating operation)
6 Actual cooling capacity or heating capacity of system
(Smaller one of 3 and 5 )
7 Calculate the cooling capacity or heating capacity of each indoor unit
The cooling capacity or heating capacity of each indoor unit
= Rated capacity of each indoor unit
x 6 System capacity / The sum of rated capacity of indoor units
8 Check the heat load and capacity of indoor unit of each rooms
(Are you satisfied 7 ≥ 1 ?)
Note: Outdoor unit is added and calculated again to lower the total
rated capacity of indoor unit in case of capacity shortage.
- (02 - 04) -
2. MODEL SELECTION

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