Product Overview

© Danfoss | DCS | 2019.04
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C
DKRCC.PD.RS0.A4.02 | 38
Danfoss 80G8222.01
TT
S2
EEV
P
Danfoss 80G8223.01
EEV
TT
S4
P P
TT
S2
EKE is a PI controller for stepper motor valve that controls the superheat of the evaporator based on a
pressure P and a temperature (S2) sensors.
In superheat mode the controller will control the superheat to be stable and close to the superheat
reference. This will give the optimal utilization of heat exchanger and there by maximum cooling
capacity. If superheat is too low the ow in the expansion is decreased and superheat will be higher.
Besides acting as a superheat controller, it can also function as a Temperature controller. this can be
accomplished via a signal from temperature sensor S3 placed in the air ow before the evaporator.
The temperature control is an ON/OFF thermostat that opens for the liquid ow when refrigeration
is required – the stepper valve opens and the thermostat relay cuts in.
The detail on the Temperature control can be found on the next chapter.
13.2 Controller Mode
EKE 1X
EKE controller
Preset OD
Defrost
Heat / cool mode
Battery
Power 24 V AC / 24 V DC
External reference
Optional connection
Mandatory connection
Alarm indication
Normal close
External main switch