Energy Saving And Optimum Operation - Daikin VRV EMERION RXYQ-AATJA Service Manual

Field Setting from Outdoor Unit
2.6

Energy Saving and Optimum Operation

This VRV system is equipped with advanced energy saving functionality (VRT). Detecting all
connected indoor unit type, advanced energy saving functionality type is selected automatically.
Depending on the priority, emphasizes can be put on energy saving or comfort level. Several
parameters can be selected, resulting in the optimal balance between energy consumption and
comfort for the particular application.
Several patterns are available and explained below.
Modify the parameters to the needs of your building and to realize the best balance between
energy consumption and comfort.
2.6.1 Target Temperature Settings
• Basic
The refrigerant temperature is fixed independent from the situation.
It corresponds to the standard operation which is known and can be expected from/under previous
VRV systems:
 To activate this operation method under cooling operation: Change field setting [2-23] to 1 or
 To activate this operation method under heating operation: Change field setting [2-23] to 2 or
• Automatic for VRT control
The refrigerant temperature is set depending on the outdoor air conditions. As such adjusting the
refrigerant temperature to match the required load (which is also related to the outdoor air
conditions).
E.g., when your system is operating in cooling, you do not need as much cooling under low outdoor
air temperatures (e.g., 77°F (25°C)) as under high outdoor air temperatures (e.g., 95°F (35°C)).
Using this idea, the system automatically starts increasing its refrigerant temperature, automatically
reducing the delivered capacity and increasing the system's efficiency.
 This operation is selected automatically with checking connected indoor unit type.
E.g., when your system is operating in heating, you do not need as much heating under high
outdoor air temperatures (e.g., 68°F (20°C)) as under low outdoor air temperatures (e.g., 23°F
(–5°C)).
Using this idea, the system automatically starts decreasing its refrigerant temperature,
automatically reducing the delivered capacity and increasing the system's efficiency.
 This operation is selected automatically with checking connected indoor unit type.
• Hi-sensible
The refrigerant temperature is set higher/lower (cooling/heating) compared to basic operation. The
focus under high sensible mode is comfort feeling for the customer.
The selection method of indoor units is important and has to be considered as the available
capacity is not the same as under basic operation. For details concerning to Hi-sensible
applications, please contact your dealer.
 To activate this setting under cooling operation: change field setting [2-8] to the appropriate
215
disconnect the circuit between terminal on external control adaptor with [2-11] ≠ 0.
disconnect the circuit between terminal on external control adaptor with [2-11] ≠ 0.
value, matching the requirements of the pre-designed system containing a high sensible
solution.
Value
[2-8]
2
3
4
5
6
7
Te target
43°F (6°C)
45°F (7°C)
46°F (8°C)
48°F (9°C)
50°F (10°C)
52°F (11°C)
Part 5 Field Settings and Test Operation
SiUS342303E