Daikin FXL63LVE [14/56] Systems introduction 13

Daikin FXYSP125KA7V1 [14/56] Systems introduction 13
5
Systems • Introduction
13
• Introduction
5 Explanation of different Systems
5-2 Inverter cooling only / heat pump systems
•SMART CONTROL BRINGS COMFORT
An electronic expansion valve, using PID control, continuously adjusts the refrigerant volume in respond to load variations of the indoor units. The VRV
system thus maintains comfortable room temperatures at a virtually constant level, without the temperature variations typical of conventional ON/OFF
control systems.
The thermostat can control stable room temperature at ± 0.5°C from set point.
•INVERTER CONTROLLED LINEAR VRV SYSTEM
The “Linear system” makes use of a multi-variable PI (Proportional Integral) control system which uses refrigerant pressure sensors to give added control
over inverter and ON/OFF control compressors in order to abbreviate control steps into smaller units to provide precise control in both small and larger
areas.
This in turn enables individual control of up to 16 indoor units of different capacity and type at a ratio of 50~130% in comparison with outdoor unit
capacity. (5HP outdoor units use inverter control compressors only.)
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Daikin’s original new multi-variable PI control system automatically controls operation using various sensors that detect refrigerant pressure and room
temperature in a certain sequence.
The system is further enhanced by the addition of a capacity control function for outdoor unit heat exchangers, and is able to execute individual control
of indoor units ranging from a minimum of 0.8HP to a maximum of 10HP. Because it is able to operate within a wide range of outdoor temperatures
including a minimum steady temperature of -5 °C (cooling), it is also able to handle tough air-conditioning conditions throughout the year.
VRV SERIES (DAIKIN PID Controls)
ON/OFF controlled air conditioner (2.5HP)
Cooling
Time
Suction air temperature
NOTE
1 The graph shows the data, measured in a test room assuming actual heating load.
REFNET Joint
Indoor unit
NOTE
1 If you plan to do cooling operation in outdoor temperatures of 15°C or less, be sure to carry out thermal insulation of the refrigerant liquid and gas
piping

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