Product Overview

© Danfoss | DCS | 2019.04
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C
DKRCC.PD.RS0.A4.02 | 43
16.2 Modulating
thermostat (MTR)
EKE 1A 1B 1C
Applicable
-
Modulating temperature regulation maintains a more constant temperature and also equalize
the load on the system so that the compressors attains better operating conditions:
• This function is typically used on central systems or brine systems.
• Each of the individual evaporator sections is controlled individually using a modulating
thermostat function.
• Cut-out value and dierence must be set as with an ON/OFF thermostat.
MTR is modulating the cooling capacity to match the cooling demand.
In the pull down phase then the temperature is well above the MTR set point cooling capacity is
at maximum and superheat is controlled to be on superheat reference. When temperature is
getting close to the MTR reference (typical 4 K) the cooling capacity gradually reduce so that the
temperature can be stable on the MTR reference.
The MTR reference is dened by temperature set point + ½ dierential.
Parameter Function Description
R014 Thermostatic mode 2 = MTR
B101 Temperature setpoint, Deg C dene desired media temperature
R001 Dierential, K dene cut in point
U118 Operational status 11 = Injection MTR, (read value)
MTR start
Temperature
setpoint
1
/
2
Dierential
Temperature S3/S4
Compressor startup
Time
Time
Valve OD
Danfoss 80G308.10
SH
Time
SH ref
Danfoss 80G352.10