KE2therm 20543 Door Switch User Manual

**KE2therm 20543 Door Switch User Manual

**

Installing the KE2 Therm Door Switch

• Configuring Ethernet Enabled Controllers: KE2 Evaporator Efficiency, KE2 Evap for Rack Efficiency & KE2 Controlled Environment
• Configuring Non-Ethernet Enabled Controllers: KE2 Low Temp & KE2 Adaptive Control

Basic Description: Designed to withstand rugged high traffic installations, the door switch provides increased energy efficiency, more stable product temperature, and is effective at preventing coil freeze ups. The reed switch is hermetically sealed with a PVC shock absorber, enclosed within a solid aluminum housing.

Installation wires are protected in a 36” (61 cm) stainless steel armored cable. The magnet is mounted on an adjustable L shaped bracket providing greater flexibility, universal mounting, higher pulling power, and a professional appearance.

Controller Operation with Door Switch Activated

• Normal system operation while the door is closed.
• When the door is opened, evaporator fans are turned off.
• If the door is open for longer than 60 seconds, the solenoid & EEV close to initiate system pumpdown. System will remain in pumpdown until door is closed.
• If the door is open for time set in Door Alarm Delay (default 30 min.) and the temperature rises 5°F (2.8°C) above setpoint, a Door Alarm is activated and the system turns on to resume cooling
• Once the door is closed, normal system operation resumes

Specification

Mounting the Door Switch

The door switch mounts in any position along the door, however the gap between the magnet A and the contact assembly/sensor B cannot exceed 2” (5 cm) when the door is closed.

If the gap is greater than 2” (5 cm) the door switch will continually signal that the door is open, and the controller will turn off the evaporators. To adjust the gap, the L-bracket has C multiple mounting holes, and the magnet can moved forward, or backward, in the slot D.

Wiring to the Controller’s Digital Input

Wire the door switch (dry contact) to a Digital Input (DI1 default). Because the wires are not polarized, either wire can connect to either terminal on the pluggable connector.

• Door switch wires may be extended with 18 AWG twisted shielded pair wire. Max 100ft
  

Position

The magnet mounts to the inside or outside of the L-Bracket.

The Contact Assembly / Sensor should be mounted parallel to one another. The switch should activate when within two inches of the magnet, but may need to be closer depending on the material theswitch and magnet are mounted to.

Mount switch parallel to the magnet

L-Bracket & Magnet Options

KE2 Therm has videos on door switch installation and programming on our YouTube
channel, at YouTube.com/ke2therm.

**Setting the controller for use with a door switch using the

controller’s display**

KE2 Evaporator Efficiency, KE2 Evap-RE & KE2 Controlled Environment

NOTE:
the controller being installed, and on the version of firmware. The basic controller naviga The navigation shown is representative of the menu. They menu will vary slightly based on – tion remains the same for all.

1. Press the right arrow until Setpoints Menu is scrolling across the display, then press the down arrow to enter the Setpoints Menu col umn.
2. Enter password will be displayed, press the EN TER button. Using the arrows enter the default password of ‘2222’ then press and hold enter.
3. Scroll down using the down arrow until Dig In 1 State is displayed, hit enter.
4. Press and hold ENTER until the LEDs start blinkthe setpoint to OPEN, then press and hold EN and hold ENTER). Press UP or DOWN to change ing (if LEDs are already blinking, do not press – TER to save.
5. Press the BACK button several times to return to the default display.
   

KE2 Low Temp + Defrost & KE2 Adaptive Control

NOTE:
The navigation shown is representative of the menu. The menu varies slightly by controller type and firmware version, however basic navigation remains the same for all.

1. Press and hold the BACK button to access the ADVANCED SETPOINT MENUS.
2. Using the down arrow, scroll down to find (Auxiliary Input 2), press ENTER. Press to the up or down arrow to change the setpoint door. Press and hold ENTER to save.
3. Using the down arrow, scroll down to find StA2 (Aux Input 2 Active State), then press ENTER.
4. Press the BACK button several times to return to the default display.

KE2 Therm recommendz using AU2, as AU1 is factory set as a second coil sensor input on the KE2  Adaptive Control.

Support

© Copyright 2022 KE2 Therm Solutions, Washington, Missouri 63090
27 March 2022 supersedes all prior publications

KE2 Therm Solutions, Inc.
12 Chamber Drive, Washington, MO 63090
1-888-337-3358
www.ke2therm.com

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