Product Overview

Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C

DKRCC.PD.RS0.A4.02 | 51

19.0 General Limiter

19.1 Priority of limiters

With the many number of limiters there could be conict in which limiter is the dominant one.

The priority of the limiters are as follows :

1. Superheat close (it is always important to avoid liquid back to the compressor)

2. LOP (Low operating pressure)

3. HCTP (High condensing temperature protection)

4. Min. S4 (Minimum S4 temperature)

5. MOP (Maximum operating pressure)

As an example can be that the pressure is low and on the same time the superheat is low. LOP

control would like to open the valve to raise the pressure. but sh close will decrease the ow to

regain a safe superheat. In this case the LOP demand is overruled by SH close. So in the end if the

conict still is active the mechanical low pressure switch will need stop the compressor.

Danfoss

80G8227.01

Pressure (P)

HCTP

MOP

LOP

Superheat

reference

Superheat

Enthalpy (H)

This section explains the various protection features available in EKE controller.