Product Overview

© Danfoss | DCS | 2019.04
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C
DKRCC.PD.RS0.A4.02 | 42
16.0 Temperature control
16.1 ON/OFF thermostat
EKE has 2 methods of controlling temperature:
• ON/OFF thermostat
• Modulating thermostat (MTR)
The need for cooling can either be dened by the incoming media (S3) or the outgoing media (S4).
The temperature in the appliance is registered by one or two temperature sensors which are located
in the air ow before the evaporator (S3) or after the evaporator (S4) respectively. The actual
temperature control can take place in two ways: as an ordinary ON/OFF regulation with a dierential
or as a modulating control. There is however a limit to the use of a modulating control as it can only be
used in central plant. In a decentralized plant the thermostat function with ON/OFF control should be
selected.
In a central plant the thermostat function may either be selected for ON/OFF control or modulating
control.
If temperature is above the set point + dierential cooling is started with maximum cooling capacity.
In maximum capacity superheat is controlled to be on superheat set point. Cooling is active until the
temperature is below set point. Need for defrosting during cooling is not considered. If defrosting is
needed another system must ensure defrosting is done when needed. In a startup, cooling will active
if temperature is above temperature set point.
EKE 1A 1B 1C
Applicable -
Off
Time
Temperature
Differential
Setpoint
Off OffOn On On
Cutin
Cutout
Time
thermostat
Danfoss 80G300.10
Valve OD
Parameter Function Description
R014 Thermostatic mode 1 = Cut in/Cut out
B101 Temperature setpoint, Deg C dene desired media temperature
R001 Dierential, K dene cut in point
U118 Operational status 7 = Thermo, cutout, (read value)
T
S3
T
S4
R
p0
T
S2
EEV
Danfoss 80G365.10
“Warm” brine / water
“Cooled” brine / water
Expansion valve
Plate heat
exchanger