Daikin EWYQ230DAYN [298/524] Cool eev control

The Digital Controller For Multiscroll Chillers ESIE06-05

2–72 Part 2 – Functional Description

EEV Normal Feed

Forward Control

This screen allows modification of the EEV FF control in cooling mode.

Settings:

EEV Low Ambient

Feed Forward

Control

This screen allows modification of the EEV FF control in cooling mode with low ambient temperatures.

Settings:

FF CONTROL UP : If the compressor load goes up, the controller will change the EEV

opening.

Output pulses= Current pulses x “FF CONTROL UP”

FF CONTROL DOWN : If the compressor load goes down, the controller will change the

EEV opening.

Output pulses= Current pulses / “FF CONTROL DOWN”

FF NORMAL UP:1.3

FF NORMAL DOWN:1.5

COOL EEV CONTROL

FF LOW AMB. UP : If the compressor load goes up AND the ambient temperature is

below the COOL AMB. CONST setpoint, the controller will change

the EEV opening.

Output pulses= Current pulses x “FF LOW AMB. UP”

FF LOW AMB. DOWN : If the compressor load goes down AND the ambient temperature

is below the COOL AMB. CONST setpoint, the controller will

change the EEV opening.

Output pulses= Current pulses / “FF LOW AMB. DOWN”

FF LOW AMB.UP :1.1

FF LOW AMB.DOWN:1.2

COOL EEV CONTROL