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KE2 Therm Solutions 20893, Quick Start Manual

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KE2 Therm Solutions 20893 Quick Start Manual Download Page 9

Q.1.23 November 2014

Page 9

KE2 

Controlled

Environment

Quick Start Guide

© Copyright 2014 KE2 Therm Solutions, Inc., Washington, Missouri 63090

EXTERNAL DIGITAL SWITCH

DEFROST (HEATER)/

DEHUMIDIFICATION 

RELAY

Wiring Schematic - 

Controller New Installation

Legend

EFM - 

Evaporator Fan Motor

DH - 

Defrost Heater

LLS -

 Liquid Line Solenoid

AUX - 

Auxiliary

PT - 

Pressure Transducer

T1 SUCTION - 

Suction Temperature

T2 AIR - 

Return Air Temperature

T3 COIL -

 Evaporator Coil Temperature

EEV - 

Electric Expansion Valve

ECM -

 Electronically Commutated Motor

D1 - 

Digital Input 1

D2 - 

Digital Input 2

D3 - 

Digital Input 3

HS -

 Humidity Sensor

- - - 

By others

All field wiring must conform to local codes

Summary of Contents for 20893

Page 1: ...ys are used for other functions External Digital Switch Relay pn 21032 only used when Digital Switch Relay is required 1 KE2 Controlled Environment 2 1 2 plastic knockout plugs 1 high voltage safety shield 1 mounting box and hardware 1 aux relay in line fuse 1 air sensor mount 5 self tapping screws 4 wire ties rated for low temp 2 course thread screws 1 fine thread machine screw with lock washer 1...

Page 2: ...vironment will initiate a defrost Liquid Vapor Mix Restrictor TEV or EEV Warm Liquid ColdVapor HotVapor Warm Air Cold Air Evaporator Compressor Condenser SaturationTemp F from receiver pressure LiquidTemp atValve F Subcooling Suction Pressure PSI SuctionTemp F evaporator outlet SaturationTemp F calculated from Suct Pressure Superheat Temp Difference TD F return air minus coil temp Coldest point in...

Page 3: ...o grow from these edges towards the center Therefore the sensor location is best situated approximately 1 to 1 1 2 from the outer edges and typically near the bottom 1 3rd portion of the evaporator The sensor needs to be as far away from the defrost heat sources as possible This is most easily located by viewing the current frost pattern The last place frost disappears during the defrost cycle is ...

Page 4: ...wire whip has the following wires that 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 ad ditional 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 un...

Page 5: ...ll illuminate when 120V is applied with 208 240V selected however it will not function properly 6 6 Controller Power The wires used to provide power to the controller are pre stripped Simply pull off the insulation Locate a 3 position terminal in the accessories kit Fasten to the 3 position pluggable connector Plug into the board as indicated in Wiring Schematic All terminal screws should be tight...

Page 6: ...re to the screw terminal and the other to the end of the in line fuse using an appropriately sized wire nut Plug into the location as indicated in Wiring Schematic Max relay rating is 3A 11 11 Preparing the Evaporator The evaporator wiring will require access to the high voltage termi nal block on the coil Turn off power to the system Verify power is no longer present using a multimeter Note Befor...

Page 7: ...nuous power to the controller Attach ground wire Note Ground is required for the inter nal safeties to operate properly 16 Evaporator wiring Fans Strip the ends of the wires con nected to the KE2 Evap used to con trol the evaporator fans The fan wires can be attached to the terminal block using either screw down terminals or spade connectors Attach one of wires to the L1 Line This wire will be con...

Page 8: ...rmi nal on the L L Solenoid Compressor relay to one of the solenoid leads Attach the wire from the COM on the L L Solenoid Compressor relay to the L1 Line Voltage Connect L2 Neutral to the remain ing L L Solenoid Compressor lead 20 Remove defrost termination Klixon from circuitry Attach one of wires to the L1 Line This wire will be connected to COM of defrost relay on the controller Attach the wir...

Page 9: ...oller New Installation Legend EFM Evaporator Fan Motor DH Defrost Heater LLS Liquid Line Solenoid AUX Auxiliary PT PressureTransducer T1 SUCTION SuctionTemperature T2 AIR Return AirTemperature T3 COIL Evaporator CoilTemperature EEV Electric ExpansionValve ECM Electronically Commutated Motor D1 Digital Input 1 D2 Digital Input 2 D3 Digital Input 3 HS Humidity Sensor By others All field wiring must ...

Page 10: ...e Total All Heaters Relay Box P N 230V 3Ø 460V 3Ø 575V 3Ø 20217 54 Amps 52 Amps 52 Amps 20218 68 Amps 65 Amps 62 Amps 20219 80 Amps 77 Amps 62 Amps Wiring Schematic Controller with KE2 Contactor Box P N 20217 50A 20218 65A 20219 80A Legend EFM Evaporator Fan Motor DH Defrost Heater LLS Liquid Line Solenoid AUX Auxiliary PT Pressure Transducer T1 SUCTION Suction Temperature T2 AIR Return Air Temper...

Page 11: ... to hold the sensor Locate the best place to install the sensor The sensor should be located between 6 and 12 inches away from the face of the evaporator This distance prevents the sensor from sensing heat from the heating elements during the defrost cycle but close enough to accurately sense the return air temperature The sensor bracket may be bent as necessary to locate the sensor in the proper ...

Page 12: ...h the two fins gently together to secure the sensor in place This provides the thermal ballast to ensure a complete defrost every time 1 5 Thermistor Epoxy 5 25 26 27 Installing the Sensor Properly It is important to note the most active portion of the sensor is the first 1 2 of the 1 1 2 long stainless steel probe 25 As a result it is important to touch two circuit tubes When inserting the sensor...

Page 13: ...efrigerant which travels along the bottom of the tube to get past The bottom of the sution line may be coated with the system s oil creating an insulating barrier between the refrigerant and the sensor 29 Installing the Humidity Sensor The humidity sensor should be located in an area the represen tative of the controlled space When selecting the sensor location some areas should be avoided Large o...

Page 14: ...r from theWiring Schematic Strain relief The enclosure has been designed with a strain relief bar to pre vent the sensor wires from becoming unplugged from inadvertent contact Before securing the sensor wires create a service loop as shown in Figure 32 Using the cable ties from the accessory kit securely fasten the sen sor wires to the strain relief bar Note Unused connectors should be placed inst...

Page 15: ...xternal Digital Switch humidifier relay dehumidifier relay heater 12 VDC 100Ω 12 A _ KE2 Controlled Environment Diagram back view Table 1 Specifications Controller InputVoltage 120V or 208 240V AmbientTemp 40 to 140 F OperatingTemp 40 to 140 F Display 4 digit alphanumeric LED IP Rating IP65 Inputs 3 temperature sensors KE2 SKU 20200 1 pressure transducer KE2 SKU 20204 1 humidity sensor KE2 SKU 206...

Page 16: ...AIN TIME COMP RUN TIME ELEC DEFROST MODE FAN DELAY TEMP MAX FAN DELAY TIME PUMP DOWN TIME MULTI AIR TEMP CTRL MULTI EVAP COOL6 MULTI EVAP DEFROST6 MULTI EVAP HEAT6 MULTI EVAP SENSOR6 HIGH TEMP ALARM OFFSET HIGH TEMP ALARM DELAY LOW TEMP ALARM OFFSET LOW TEMP ALARM DELAY HUMIDITY ALARM OFFSET HUMIDITY ALARM DELAY DOOR ALARM DELAY DIG IN 1 MODE DIG IN 1 STATE DIG IN 2 MODE DIG IN 2 STATE DIG IN 3 MO...

Page 17: ... TYPE The controller is defaulted to be used with a KE2 EEV but may be used with a mechanical valve or 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 Adjusting Controller Parameters The controller has the ability to access an abundance of informa tion from the 4 digit alphanumeri...

Page 18: ...ntollers or let run independently in COOL or OFF modes MULTI EVAP DEFROST Select whether to sync bonded controllers or let run independently in DEFROST or DRAIN modes MULTI EVAP SENSOR Select whether to SHARE or NOT SHARE sensor readings for bonded controllers HIGH TEMP ALARM OFFSET The number of degrees above ROOM TEMP for a HIGH TEMP ALARM condition HIGH TEMP ALARM DELAY Minutes the room tempera...

Page 19: ...s if DEFROST TYPE HOT GAS COMP ON HOT GAS COMP OFF 40 minutes if DEFROST TYPE AIR 0 to 15 minutes 2 minutes 0 to 24 hours 6 hours PULSE PERMANENT PERMANENT 40 F to 35 F 20 F 0 to 20 minutes 2 minutes 0 if Room Temp Setpoint is 35 F 0 to 10 minutes 0 minutes WARMEST AVERAGE WARMEST SYNC INDEPENDENT SYNC SYNC INDEPENDENT SYNC SHARED NOT SHARED SHARED 0 F to 99 9 F 10 F 0 to 120 minutes 60 minutes 0 ...

Page 20: ...AUTO MANUAL FAN RELAY Manually energize or de energize evaporator fan relay AUTO ON OFF MANUAL OFF MANUAL ON AUTO MANUAL AUX RELAY Manually energize or de energize auxiliary relay AUTO ON OFF MANUAL OFF MANUAL ON AUTO FACTORY RESET Reset the controller to the factory default setpoints RESET WEB PASSWORD RESET Reset the web password to the factory default setpoints RESET Parameter Name Description ...

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