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System Design

1. System Configuration

D-3

(2) Calculation of actual performance

Indoor units with up 130% of outdoor unit capacity can be connected.

* Up to 24 indoor units can be connected to an outdoor unit.

Multi-unit air conditioning system performance depends on ambient temperature, piping lengths and

mounting height differences, so each correction factor should be taken into account when selecting the
model type.

(1) Dependence of multi-unit air conditioning system performance on installation conditions

1) Indoor unit cooling capability =

(Outdoor unit rated cooling capacity)

Note 1

× (Indoor unit rated cooling capacity)

Note 3

÷ (Total rated cooling capacity of the indoor units)

Note 5

× (Correction factor for temperature and connected capacity, from performance characteristics)

Note 7

× (Correction factor for piping length)

Note 8

2) Indoor unit heating capability =

(Outdoor unit rated heating capacity)

Note 2

× (Indoor unit rated heating capacity)

Note 4

÷ (Total rated heating capacity of the indoor units)

Note 6

× (Correction factor for temperature and connected capacity, from the performance characteristics)

Note 7

× (Correction factor for piping length)

Note 8

Note 1. Outdoor unit rated total cooling capacity (see the outdoor unit specification table) is the cooling

capacity under JIS conditions (indoor side: 27°CDB,19°CWB , outdoor side: 35°CDB,-°CWB)

Note 2. Outdoor unit rated total heating capacity (see the outdoor unit specification table) is the

heating capacity under JIS conditions (indoor side: 20°CDB, -°CWB , outdoor side: 7°CDB,
6°CWB)

Note 3. Read the rated cooling capacity of the applicable indoor unit from the indoor unit specification table.

Note 4. Read the rated heating capacity of the applicable indoor unit from the indoor unit specification table.

Note 5. Read the rated cooling capacity of the applicable indoor unit from the indoor unit specification

table, and obtain the total for all units..

Note 6. Read the rated heating capacity of the applicable indoor unit from the indoor unit specification

table, and obtain the total for all units..

Note 7. Read the percentage data at the required temperature from the relevant capacity table in the

“Model Basic Data Table” for the outdoor unit, and divide by 100. (Contact your Sanyo
business representative for the Model Basic Data Table.)

*In the case of two outdoor units, calculate as follows:

(Correction factor for outdoor unit × rated capacity of outdoor unit)

(Rated capacity of outdoor unit)

Example) Connecting two units (A/C)

= Correction factor of outdoor unit 1, W

= Rated cooling capacity of outdoor unit 1

= Correction factor of outdoor unit 2, W

= Rated cooling capacity of outdoor unit 2

× W

+ W

Note 8. Correction factor for piping length

Determine the effective length of refrigerant piping and the mounting height difference
between outdoor and indoor units (positive when the outdoor unit is higher, and negative
when the indoor unit is higher). Read the correction factor from the “Performance correction
for refrigerant piping length” for the outdoor unit, and divide by 100 for percentage.

System correction factor =