Product Overview

© Danfoss | DCS | 2019.04
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C
DKRCC.PD.RS0.A4.02 | 53
19.4 High condensing
temperature
protection
Note:
HCTP feature requires mounting
pressure transducer Pc at
compressor discharge line or
getting its value via Bus
High condensing temperature protection will make sure that the load on the condenser is reduced
in case the high condensing temperature is reached. This protection prevents discharge pressure
from exceeding a set maximum pressure by reducing injection valve OD.
HCTP reduces the valve opening degree in such a way that the condensation pressure is kept below
a specied setpoint. This can limit the compressor discharge temperature increase caused by
changing conditions. The parameter “HCTP temp setpoint” ( Max. Pc SetPoint) is determining the
HCTP temperature setpoint (converted from pressure input).
C
Danfoss 80G8230.01
E
EEV
S2 P
e
P
c
HCTP feature will activate when condensation temperature is inside the HCTP setpoint band.
If the pressure stops increasing, the system will operate with HCTP active until conditions allow
injection control again. If conditions turn to the worse, pressure will increase and cross the setpoint
and an alarm function will monitor as long as this continues. If HCTP is over setpoint longer than
the time specied by parameter ‘AlarmTimeout HCTP’ an alarm is set (parameter A15. Max. time high
discharge protection).
Parameter Function Description
N133 High cond. temp. protection function 0 = O | 1 = ON
N134 High cond. temp. protection setpoint
High condensing temperature protection setpoint
Setpoint unit is saturated temperature in condenser.
50 °C, default
Tc condenser
temperature
SH
OD
If condenser is above HCTP
setpoint the massow is
reduced giving less load on
condenser
During high condenser
temperature the SH will not
follow SH reference
HCTP
setpoint
SH ref
Danfoss 80G359.10
EKE 1A 1B 1C
Applicable - -