Configuring Evaporators - Danfoss AK2-SC 255 Reference Manual

Configuring
evaporators
RS.8D.M1.22
change for that stage, giving the total horsepower you have selected for that stage.
You can change the number of steps at any time.
To begin configuration of evaporators, return to the Configure Rack menu and select
Evaporators. Or, from the Main Menu (which you can always reach with the
MENU key) select Configuration, Refrigeration, the particular rack, and Evaporators.
The evaporator menu will initially look like as on the left below, with no evaporators
listed, but as soon as you enter a number in answer to the top question, and select
from the Type list box for some of the evaporators, the screen will look something
like the one at right:
There are six kinds of evaporator control shown. In this manual, we will discuss the
configuration of SC 255 circuits and AKC 16x circuits. For the other types of evapo-
rators, please see the manuals on the individual controllers. In the future, when a
Danfoss Case Control manual is created, we will remove the AKC 16x material from
this manual.
First, the changeable fields in the Evaporator Menu (shown above on the right) are as
follows:
Number of circuits
Dewpoint method
Dewpoint sensor to use
AK2-SC 255 Reference Manual
(1 to 40) The number of circuits in the suction group.
(List box:)
Dewpoint: A dewpoint sensor or sensors will be used
for anti-sweat control.
Calc Dewpoint: Dewpoint for anti-sweat control will
be calculated using the values of relative humidity and
temperature sensors.
[If Dewpoint has been selected](List box:) How anti-
sweat control dewpoint will be determined if a
dewpoint sensor is used.
Min Dewpoint: The lowest-reading of a number of
dewpoint sensors will be used.
Max Dewpoint: The highest-reading of a number of
25