ECONOMIZER INPUT FUNCTION
Cooling economizer:
Consists of ducts, dampers, and automatic controlling system. In cold or warm climate, the
economizer reduces or stops the VRF compressor, providing cooling using outside air.
●Example of economizer
Return air damper
Room space
●How to use economizer
Operation
Environmental condition Intaking fresh
mode
Heating
Cold climate
(~34°F [1°C])
Fresh air
Cool climate
intake cooling
(34~55°F [1~13°C])
Combined
Warm climate
(55~75°F[13~24°C])
VRF cooling
Hot climate
(75°F~ [24°C~])
*Minimum fresh air requirements are specified in ASHRAE Standard 62.1.
Economizer
logic module
Fresh air damper
Exhaust damper
Air
air
conditioner
Minimum*
Heating
Optimum
Stop
100%
Cooling
Minimum*
Cooling
- (08 - 27) -
Economizer
Remarks
Disable
Heating by the air conditioner
Enable
Cooling by intaken fresh air
only
Enable
Combined cooling by
intaken fresh air and the air
conditioner
Disable
Cooling by the air conditioner