Daikin FTXZ25NV1B Service Manual page 43

SiMT041311E
Explanation of
SARARA DRY
Operation with
Psychrometric
Chart
(1) Suction air
(2) Suction air (the air passing through the cooled part of indoor heat exchanger) is
(3) Dehumidified air is mixed with the room air.
Effective airflow rate changes according to the required dehumidifying amount. The larger the
required dehumidifying amount is, the larger the effective airflow rate becomes. Although the
difference of absolute humidity is constant, the dehumidifying amount increases.
The amount of room air to be mixed with dehumidified air changes according to the required
dehumidifying amount. The larger the required dehumidifying amount is, the larger the effective
airflow rate for dehumidifying becomes. Consequently, the available volume of room air to be
mixed and the discharge air temperature also decrease.
Reference Data
for SARARA DRY
Operation
<Condition>
Room temperature: 24°CDB, 60%RH(18.5°CWB)
Outdoor temperature: 24°CDB, 80%RH(21.5°CWB)
Note •
•
•
Function and Control
dehumidified.
Dehumidifying amount
Discharge air temperature
Sensible heat
300 W
(300 W ~ 1,050 W)
The larger the required dehumidifying amount is, the more the sensible heat increases, and
the discharge air temperature decreases.
The smaller the air conditioning sensible heat load is, the lower the room temperature drops.
The drop of room temperature after operation start is within 3 degrees as SARARA DRY
operation has a thermostat off point.
Dehumidifying
amount
(1)
(3)
(2)
Dry-bulb temperature t (˚C)
Dehumidifying amount
230 cc
(230 cc ~ 1,000 cc)
Main Functions
(R19701)
Discharge air temperature
(difference from suction air temperature)
–2°C
(–2°C ~ –8°C)
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