Q.1.3 November 2017
Page 3
© Copyright 2017 KE2 Therm Solutions, Inc., Washington, Missouri 63090
KE2
Evaporator
Efficiency
Quick Start Guide
NO NC
COM
NO NC
COM
COM
NC
NO
COM
NC
N0
Solenoid Relay
Defrost
Relay
Fan
Relay
208-240
Power Input
Voltage Jumper
208-240 Default
L1
Ground
L2
COM
NC
NO
COM
NC
N0
Auxiliary Relay
Evaporator
?
therm
solutions
ENTER
BACK
®
Efficiency
Evaporator
Press and hold for
manual defrost
24-hour
Emergency Technical Support
1.888.337.3358
2
2
Cut a length of conduit to go from the controller to the evaporator
Measure the distance between the controller and evaporator to account for
the extra length necessary to properly route conduit.
Determine the number of wires to go to the controller.
Controller power (3 wires)
Fan control (2 wires)
Defrost (heater) control (2 wires)
Liquid line solenoid (2 wires)
If the Aux Relay is used, the installer will need to supply an additional
pair of wires to the controller
Aux relay (2 wires)
Note: Install in accordance with local wiring codes. KE2 Therm does not
accept responsibility for incorrect or unsafe wiring.
2
2
Cut wires to length
Once the number of wires is determined, cut the wires to length.
The wire should be long enough to account for the necessary connections
in the controller and evaporator.
Use the optional KE2 Wire Harness, or select different colored wires, (recom-
mended colors: blue - fan, orange - heaters, yellow - solenoid, purple - alarm).
This will simplify the installation and troubleshooting. If only a single color is
available, both ends of the wires should be labeled with a matching number.
This will save time when wiring the evaporator.
3
Determine the current draw of the unit.
Use the nameplate to determine the Amp rating of the unit, and select the
proper sized wire. Also, verify the unit does not exceed the relay rating on the
KE2 Evaporator Efficiency controller.
If the amp draw of the fans, heaters, compressor or aux relay exceeds the
rating of the onboard relays, external contactors must be used. In that
case, the onboard relays are used to switch the power to the contactor
coils. KE2 Therm can provide ready made and tested contactor panels
for various high amperage applications. See Page 9. Contact KE2 Therm
for specific information.
4
4
Preparing conduit
Feed the wires through the conduit.
The conduit connectors can be added at this time. Determine if a straight
or 90 degree connector is most appropriate for the installation, and attach to
the conduit.
Securely connect one end of the conduit to the controller, or mounting
box, if used.
5
5
Wiring the controller
The controller is pre-configured for 208/230V incoming power by the in-
stalled four-position plug with a single jumper, as shown in Figure 6.
A second plug with two jumpers, as shown in Figure 6, is included in the kit
to convert the controller to 120V incoming power. Simply replace the single
jumper plug with the two jumper plug. See Back View of Controller, page 13.
Power should not be connected to Voltage selector, it is a selector only.
Power for the controller should be connected to the Power In location us-
ing a 3 position connector.
Controller will illuminate display when 120V is applied with 208-240V
selected, however, controller will not function properly.
6
6
120V
208-240V
3
