KE2 Temp Air Defrost Installation Guide

KE2 Temp Air Defrost

Parts List

The following parts are included in the KE2 Temp + Defrost kit:

• A (1) KE2 Temp + Defrost controller
• B (1) temperature sensor – 45”
• C (4) self-tapping mounting screws
• D (1) liquid tight cord grip
• E (1) sensor ziptie
• F (1) programming sticker
• G (2) screws for high voltage shield
• H (1) high voltage shield

Supplies List

All of the accessories required for the controller to work are supplied, however, standard truck stock items are required to install the controller.

A list is provided below:

• conduit to go between the controller & evaporator
• (2) conduit connectors (straight or elbow as required)
• (4) high voltage wires matched to the load of the liquid line solenoid/ compressor and the controller. wire labeling (numbers, colors, etc.) additional wire ties
• 18 gauge twisted shielded pair (if extending sensor wires)
• foam insulation (if running wires outside the space)
• silicone (for sealing any box penetrations)
• Cat5e cable (if setting up communications)

Select Mounting Location
The KE2 Temp is designed for a wide range of applications; therefore there are many potential installation locations. Breaking down the installation location by application provides the most helpful reference.

Outside controlled space
Walk-in| Evaporator cabinet
Adjacent to entrance
Side-by-side| Above door

Remote Monitoring, Control, Alarm Notifications

The KE2 Temp includes RS-485 Modbus communications and can be accessed remotely using the Alarms KE2 Edge Manager (KE2 EM). See page 4 for additional details.

Service Call Saver

Post Defrost Indicator To eliminate unnecessary service calls, the KE2 Temp + Defrost alerts the user when it is coming out of a defrost cycle using the onboard display. The display alternates between dEF and the actual temperature measured by the air sensor.
This continues until the temperature has reached setpoint, or for the amount of time set by dFt (Defrost Time) whichever is shorter.

Wiring the Controller

The KE2 Temp was designed with simplicity in mind. The controller accepts 120V / 208-240V to power the controller and 12V – 240V solenoid voltage via the liquid line solenoid relay through the lower conduit connection. The temperature sensor and communication wires are attached via the upper conduit connector.

1. When wiring the controller first remove the display by loosening the four corner screws. The display is connected to the lower board by a short ribbon cable.
   Caution : The board may be damaged if excessive force is used when removing the cover.

2. After the four screws have been detached from the lower section, the cover may be gently moved to the side

3. Next remove the high voltage protective cover. There are two screws holding it in place.

4. With the high voltage cover removed, the two screw terminal connectors can be seen. The red 2-position connector is the controller’s power supply. The voltage selector switch should be positioned to match the voltage supplied.

5. Connect line (L1) to the left most terminal position (1) and neutral (L2) to terminal position (2).

6. The liquid line solenoid (LLS) relay accepts a variety of input voltages and is not required to match the controller’s input. See table for relay ratings. The relay uses the 3-position screw terminal to make the connection on the board. It may control the liquid line solenoid or act as a pilot relay for the compressor contactor. The controller will be breaking one leg of power to the LLS.
   If solenoid will use the same voltage as controller, one leg of incoming power supply (L1) for the liquid line solenoid should be connected to the common terminal of the liquid line solenoid relay (5). The other leg of incoming power (L2) for the solenoid should be connected directly to one of the solenoid leads (not shown). The remaining lead for the solenoid should be connected to the NO (normally open) terminal of the liquid line solenoid relay (4).
   Proper wiring practices must be followed. Local wiring codes take precedence over any information in this bulletin.

7. Replace high voltage shield after wiring is completed
   Voltage Table

   Outputs:

(1) Relay Single Pole Double Throw

|  | Normally Open| Normally Closed
120V| 240V| 120V| 240V
FLA| 12A| 12A| 10A| 10A
Resistive| 20A| 20A| 20A| 20A
Pilot Duty| 800VA| 720VA| 290VA| 360VA

Low Voltage Connections

• Temperature sensor – The temperature sensor terminal is located on the cover’s circuit board and is permanently attached. The temperature sensor input consists of the right two terminals.
• Although the terminals are labeled ‘+’ and ‘ – ‘ the sensor is not polarized and may be connected in either orientation.
• The sensor should be fed through the top conduit connection using liquid tight cord and before being attached to the board. If Modbus communication is being used, a water tight type conduit may be used instead.

Communications Wiring

• To enable communications, a wired connection to the Alarms KE2 Edge Manager (KE2 EM) accessory is required. Unless cable specified for RS-485 communications is available, Cat5e is recommended. Separate the white & blue pair from the rest of the pairs and wire to the controller.
• Connect ‘A’ on the controller to ‘A’ on the KE2 EM. Similarly, connect ‘B’ on the controller to ‘B’ on the KE2 EM.
• If adding multiple controllers, daisy chain to the next controller.
  Change the address setpoint (Adr) for each controller in the daisy chain. Each controller in the daisy chain must have a different address. See page 7) for instructions to change setpoints.

Accessing the KE2 Temp on a Local Area Network

After setup, the KE2 EM provides immediate local access to the KE2 Temp via Wi-Fi. More information on the KE2 EM is found in bulletins Q.5.42 and Q.5.62.

Accessing the KE2 Temp on the Internet

When used with the KE2 EM, the KE2 Temp can be accessed remotely through the KE2 Smart Access portal, anywhere Internet service is available. So, there’s no need to worry about your refrigerated products overnight, during holidays, or vacations. Just go online and see, or setup the email/text alarm alerts feature for instant notification of system issues. More information on KE2 Smart Access is found in bulletin Q.1.34 and A.1.76

Webpage View
From the Webpage you can monitor temperatures, relay status and alarms, as well as make changes to setpoints, and manually control the system

Programming the Controller

Many applications of the KE2 Temp + Air Defrost can use the controller’s preset defrosts per day. This automatically spaces the defrosts throughout the day, based on the number of defrost cycles selected. The user has the ability to change the number of defrost cycles performed by changing the Defrost per Day setpoint from 0 to 12.
For more specific applications, the KE2 Temp has the option to schedule each individual defrost at a specific time of day.

KE2 Temp + Air Defrost Basic Navigation

Understanding the KE2 Temp + Air Defrost’s menu structure will simplify configuration. Figure 1 shows the basic button functions, as  well as a list of basic setpoints.

Low Battery Indicator

Blinking red light indicates the Real Time Clock battery needs to be replaced

Service Call Saver – Post Defrost Indicator
To eliminate unnecessary/unwarranted service calls, the KE2 Temp + Defrost alerts the user when it is coming out of a defrost cycle using the onboard display. The display alternates between dEF and the actual temperature measured by the air sensor. This continues until the temperature has reached setpoint, or for the amount of time set by dFt (Defrost Time) whichever is shorter.

Basic Setpoints

• Selecting fewer than 5 compressor starts per hour results in the starts per hour feature being turned off. The compressor will then function on temperature only.
• Selecting CUS (custom) unlocks additional Setpoints. See Advanced Setpoints table

Advanced Setpoints

includes setpoints only visible when CUS (custom) is selected under dPd (defrosts per day)

Selecting fewer than 5 compressor starts per hour results in the starts per hour feature being turned off. The compressor will then function on temperature only.

Custom Defrost Setup

The following steps will guide you through the setup of the KE2 Temp’s custom defrost feature

Abbreviations:

• CUS = custom
• d1 = custom defrost 1
• diS = disabled
• dpd = defrosts per day
• ts = temperature setpoint
• tod = time of day

1. STEP 1
   Press and hold the ENTER button, tS is displayed on the LEDs

2. STEP 2
   Press the up arrow until dPd is displayed then press ENTER , 6 (default) will be displayed

3. STEP 3
   Press the up arrow until CUS is displayed
   Press and hold the ENTER button for 3 seconds until the dPd is displayed

4. STEP 4
   Press the up arrow until tod (time of day) is displayed,
   then press ENTER
   Use the up arrow and down arrow to set the time
   Note : The time is displayed in military time (24-hr clock) The 1st 2 digits are the hour. The minutes are after the decimal. Since there are only 3 digits, the time will be set to the nearest 10 minutes. See examples below.
   Examples
   8:10 am would be 8.1 on the controller’s display
   4:32 pm would be 16.3 on the controller’s display
   After the time is set, press and hold the ENTER button for 3 seconds, until tod is displayed

5. STEP 5
   Press the up arrow to display Defrost 1 (d1).
   To set the first defrost, press the ENTER button.
   diS (disabled) will be displayed
   Use the down arrow to set the defrost time.
   Note : Defrost times may only be set on the hour.
   Example
   2:00 am would be 2
   Once the correct time is displayed, press and hold the ENTER button until d1 is displayed.

6. STEP 6
   Repeat steps as necessary for d2 to d12

7. STEP 7
   Press the BACK button to save settings, and return to the main screen (room temp will be displayed).

Dimensions

Inches

Wiring Diagram

© Copyright 2022 KE2 Therm Solutions, Washington, Missouri 63090 Q.3.20 (Q.1.20) April 2022 supersedes all prior publications
KE2 Therm Solutions
12 Chamber Dr.
Washington, MO 63090
636-266-0140
www.ke2therm.com

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