Fujitsu AJ 126LELDH Series Design & Technical Manual page 32

1-3. Capacity calculation method
The capacity calculation method which takes the effects of air temperature, pipe length, and frosting/
defrosting into consideration is shown below.
(TCin)r : Capacity of indoor unit at rated condition
(TCin)d : Capacity of indoor unit at design temperature
(TCin)e : Estimated capacity of indoor unit
∑(TCin)r : Total capacity of indoor units at rated condition
∑(TCin)d : Total capacity of indoor units at design temperature
(TCout)r : Capacity of outdoor unit at rated condition
(TCout)d : Capacity of outdoor unit at design temperature
(TCout)c : Compensated capacity of outdoor unit
• Estimated capacity of each indoor unit
1. Find (TCin)r and (TCin)d.
Refer to "Cooling capacity table (Indoor unit)"
door unit)" on page 02-43.
2. Find the following compensation coefficient.
Refer to "Capacity compensation coefficient"
– Compensation coefficient of pipe length
– Compensation coefficient of frosting/defrosting (For heating calculation only)
3. Calculate (TCin)e.
– Cooling calculation
(TCin)e = (TCin)d × compensation coefficient of pipe length
– Heating calculation
(TCin)e = (TCin)d × compensation coefficient of pipe length × compensation coefficient of
defrosting/frosting
1-3. Capacity calculation method
on page 02-13 or
on page 02-12.
- (02-4) -
"Heating capacity table (In-
1. Model selection and capacity calculation