Product Overview

© Danfoss | DCS | 2019.04
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C
DKRCC.PD.RS0.A4.02 | 55
19.6 Maximum Operating
Pressure (MOP)
EKE 1A 1B 1C
Applicable
Maximum Operating Pressure (MOP) will make sure that the evaporating pressure (P0) is kept below
the MOP setpoint. During startup and pulldown it might be needed to keep the suction pressure low
to avoid overload of the compressor. If MOP is active P0 is kept on the MOP setpoint. An overshoot is
possible. The MOP setpoint is kept by reducing the ow in the expansion valve. While MOP is active
the superheat is higher than superheat reference.
This function takes precedence over the superheat control, so during MOP control the superheat is
not controlled.
The MOP function is active when N130 parameter is set to ON.
The pressure value is converted to the corresponding temperature value and when the MOP is
active, the controller will prevent the evaporating temperature Te from exceeding this value.
For applications with a need to de-humidify the evaporator, it is possible to control on the saturated
evaporator temperature with a MOP function by setting MOP setpoint lower in order to achieve
dehumidication of the air.
Danfoss 80G8233.01
P
TT
S2
EEV
Parameter Function Description
N130 MOP function 0 = O | 1 = On, default value = O
N011 MOP setpoint
Setpoint unit is saturated temperaure in evaporator. If the suction
pressure reaches the set MOP limit, the valve will close faster
irrespective of superheat.
0 deg C, default
Room temperatur
e
temperature
re
Temperature
Room Temperatur
e
Danfoss 80G360.10