Nor-Lake Enviro-Control IOM - Manual (Page 10)

KE2 EvaporatorEfficiency
Installation Instructions
Mounting the Controller
Once the wiring has been run to the controller location, the con-
troller can be connected. When installing the KE2 Evaporator
in the mounting surface. The controller has keyholes in each
mounting tab to allow the controller to be installed over the
screws. The mounting pattern can be seen in Figure 9 .
User Interface
The KE2 Evap’s onboard user interface uses a familiar 6-button
arrangement to simplify navigation through the controller’s
menus. The menu has been grouped by category to provide an
easy to program structure. By grouping the menu by each func-
tional area, the user is not required to scroll though unrelated
setpoints to access the desired functionality.
The left and right arrows move between the categories. When
pressed while in a menu, the left and right arrows will move to
the main screen or the adjacent menu.
The up and down arrows move the user through the available
options for each group. All users are allowed access to the vari-
able alarms. All other information is password protected to pre-
vent unauthorized access to the controller’s functionality.
The ENTER button is used to save an input option when it has
been changed. The enter button must be held for 3 seconds
to prevent accidental changes . Changes may be discarded by
waiting, to allow the controller to timeout and return to default
screen, or hitting the BACK button.
The BACK button is used to return to the previous screen. Press-
ing the BACK button twice at any time will return the user to the
default view. See Table 2 (following page) .
Controller Setup
Upon initially applying power to the controller, the controller
will initialize, then automatically enter the Quick Start Menu.
The Quick Start Menu consists of as little as 3 setpoints that must
be configured for KE2 Evap to begin controlling the system.
Table 1 shows the Quick Start Menu. The first setpoint the user
is asked to enter is the desired ROOM TEMP. This is followed by
the DEFROST TYPE. The controller is designed to work with
electric, hot gas, and off time defrosts. The last setpoint is the
VALVE TYPE. The controller is defaulted to be used with a me-
chanical valve, but may be used with a variety of EEVs, including
a customer defined valve.
These are the only setpoints required to begin controlling the
system, when applied on a single evaporator with a mechanical
valve, See Table 1 .
Table 1 - Quick Start Menu
Mechanical Valve
TEV
3 steps
Standard EEV
4 steps
Custom EEV
7 steps
Room Temp Room Temp Room Temp
Defrost Type Defrost Type Defrost Type
Valve Type Valve Type Valve Type
Refrigerant Refrigerant
Motor Type (Unipolar/Bipolar)
Motor Step Rate
Max Valve Steps
If using a standard/predefined EEV, the user will also be prompt-
ed to specify the REFRIGERANT. The KE2 Evap may also be ap-
plied to user defined EEVs. When this option is selected, the user
will be prompted to select MOTOR TYPE, MOTOR STEP RATE,
and MAX VALVE STEPS. Once these have been set, the KE2
Evap will begin controlling EEV and the system. Table 3
Adjusting Controller Parameters
The controller has the ability to access an abundance of infor-
mation from the 4-digit alphanumeric display. However, the
controller requires a password, adding a degree of protection
from unwanted modifications. The controller will prompt the
user for a password PASSWORD when the user attempts to ac-
cess setpoints they do not have permission to change.
Table 2 shows the menu structure of the controller. The default
display of the controller always displays the actual room tem-
perature. Pressing the ENTER button will display room temp
ROOM TEMP. Pressing the up and down arrows moves the
display through the VARIABLES menu. See Table 2 By default,
the controller only allows access to the room temperature. The
VARIABLES menu consists of the current sensor readings and
the relays’ state. The User Password (1111) only provides ac-
cess to the ROOM TEMP setpoint.
For the protection of the system, access to the SETPOINT
and MANUAL control requires an Installer Password (2222) .
Pressing the right or left arrow will move from the Variables
menu to the next menu, shown in Table 2, a complete list of
parameters are shown in Table 3 .
Pressing the BACK key at any time will return the user to next
level up the menu. A second press will either return to the Main
Menu or to the room temperature reading.
10 01/13 Rev. A 151627
Enviro-Control™