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Mitsubishi Heavy Industries EEVKIT6-E-C/A Technical Manual

For single refrigeration system
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TECHNICAL MANUAL
EEV-KIT
For single refrigeration system
EEVKIT6-E-C/A, /B
In this manual, For multiple refrigeration system of EEV-KIT is shown.
Regarding the others manual please see below table.
General information
For multiple refrigeration system (EEVKIT6-E-M/A, /B, -C/A, /B)
Preliminary information, all of contents are subject to final confirmation by MHI.
Manual
Manual No.'19・KX-T-336
updated February 24, 2021
No.
•
'19
KX-T-335
•
'19
KX-T-337

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  • Page 1 Manual No.'19・KX-T-336 updated February 24, 2021 TECHNICAL MANUAL EEV-KIT For single refrigeration system EEVKIT6-E-C/A, /B In this manual, For multiple refrigeration system of EEV-KIT is shown. Regarding the others manual please see below table. Manual • General information KX-T-335 •...

  • Page 3: Table Of Contents

    '19 • KX-T-336 Contents 1. What is a single refrigeration system ............1.1 System A ....................1.2 System B ....................2. Components of a single refrigeration system ......... 3. Functions ..................... 3.1 SW1- SW5 (Address setting) ..............17 3.2 SW6 (Model capacity selection) ............. 18 3.3 SW7 (Function setting) ................

  • Page 4: What Is A Single Refrigeration System

    • There are 2 types of EEV-KIT systems that can be built into the single refrigeration system. • System A : one EEV-KIT. • System B : multiple EEV-KIT’s. Single refrigeration system EEVKIT6-E-C/A EEV-Control ASSY Sensor （5pcs） Thi-A Thi-R2 Thi-AF...
  • Page 5 '19 • KX-T-336 Sensors O/U address Thi-A Suc on air temperature sensor Thi-AF Supply air temperature sensor Thi-R1,R2,R3 Heat exchanger temperature sensor EEV-Set Signal line Strainer Strainer Thi-R2 Thi-R3 Thi-AF Thi-A To other I/U Thi-R1 [Note] EEV-Control box Normal I/U can be O/U address: 01 connected with EEV-KIT.
  • Page 6 '19 • KX-T-336 • All wiring for the 5 sensors, EEV-coil, operation command to indoor fan motor, remote control and Superlink line must be connected to the EEV-Control box. • Check both return/supply air temperature sensors. (Thi-A,AF) whether the temperature is detected correctly.

  • Page 7: System B

    '19 • KX-T-336 • The remote control for the KXE6 system (RC-E5) shall be provided separately if required. • Central control (SC-SL4) can be use for controlling together with other indoor units. • The limitations of the address settings, capacity selection and cable length of the Superlink line are the same as the KXE6 systems.
  • Page 8 '19 • KX-T-336 In case of a multiple refrigeration system, use the EEV-KIT for multiple refrigeration systems. EEV-Set EEV-Control ASSY EEV-Set EEV-Control BOX EEV-Control box O/U Address Sensors （5pcs） Strainer Thi-A Thi-R2 Thi-AF Strainer Thi-R1 Thi-R3 EEV-KIT Thi-R3 O/U Address Thi-R2 Thi-R I/U Address...
  • Page 9 '19 • KX-T-336 1. The wiring connection method for each EEV-KIT is basically the same as that for system A. 2. All of the return/supply air temperature sensors for all the EEV-KIT’s shall be placed and connected individually. 3. The wiring for the fan motor command signal should be connected to one of the EEV- Control boxes.

  • Page 10: Components Of A Single Refrigeration System

    2. Components of a single refrigeration system Components of a single DX AHU refrigeration system (1) Slave EEV Control ASSY (EEVKIT6-E-C/A, /B) ① Slave EEV-Control box ② 2 air sensor Assy. (Thi-A, Thi-AF)� ③ 3 heat exchanger sensor Assy. (Thi-R1, Thi-R2, Thi-R3)

  • Page 11: Functions

    '19 • KX-T-336 3. Functions (1) Outline PCH000Z418...
  • Page 12 '19 • KX-T-336 PCH000Z418...
  • Page 13 '19 • KX-T-336 PCH000Z418...
  • Page 14 '19 • KX-T-336 (2) Wiring diagram PCH000Z420...
  • Page 15 '19 • KX-T-336 Input/output summary Capacity TB1 *1 Power source terminal block AC300V, 25A TB2 1,2 Output for fan AC600V 15A AC250V, max 10A DC125V, max 10A [ Fan speed : UHi, Hi ] 3,4 Heating output 5,6 Input for AHU anomaly Dry contact 7,8 Output for fan AC250V, max 10A...
  • Page 16 '19 • KX-T-336 Wiring connection example Damper for free cooling Thi-A Thi-AF Thi-R1 Thi-R2 Thi-R3 EEV-KIT Single phase Power source (UHi,Hi ) (Me,Lo) 51X1 52X1 52X2 Float switch Fan motor error signal Fan motor Normal : Open Error : Close operation signal ＦＡＮ...
  • Page 17 '19 • KX-T-336 2) FAN motor error signal The AHU fan motor should be controlled by the EEV-KIT control. If the AHU fan motor can not operate, the outdoor unit system must stop. Normal Error Prepare on site Prepare on site 51X1 51X1 51X1...
  • Page 18 '19 • KX-T-336 4) Signal for humidifier a) Wire connection example with total heat exchanger b) Wire connection example with humidifier alone Indoor unit Indoor unit Humidifier ● The heating output 3-4 is output in heating mode regardless of operation / stop. Make sure to connect wires so that the humidifier is operated synchronized with the operation of EEVKIT.

  • Page 19: Sw1-Sw5 (Address Setting)

    '19 • KX-T-336 SW5: For address setting, etc. SW1-SW4：For address setting (See item 3.1) (See item 3.1) SW6: For capacity selection SW7: For function setting (See item 3.3) (See item 3.2) SW1-SW4 and SW6 can be set according to the required specifications. (Same method as the KXE6 indoor unit) 3.1 SW1-SW5 (Address setting) Set address in the same manner as KXE6 orKXZE1 system.

  • Page 20: Sw6 (Model Capacity Selection)

    '19 • KX-T-336 3.2 SW6 (Model capacity selection) Set the model capacity according to the heat exchanger capacity. The capacity setting is the same as the KXE6 or KXZE1 indoor unit rule. Model capacity SW6-1 SW6-2 SW6-3 SW6-4 Default 3.3 SW7 (Function setting) ★...

  • Page 21: Switching Return/Supply Air Temperature Control

    '19 • KX-T-336 Return/supply air temperature control Pressure control Target pressure / supply Control mode air temperature setting guideline Evaporating temperature: 5-12℃ STANDARD Condensing temperature: 42-47℃ Return air temperature control Evaporating temperature: 5-12℃ TYPE1 Condensing temperature: 32-37℃ Cooling supply air temperature: 12-18℃...
  • Page 22 '19 • KX-T-336 Return air control: Same control as normal KX indoor unit Supply air control: Indoor unit adjust refrigerant volume by EEV Comparison of both control Return air Supply air Adjustable Capacity Maximum Heat exchange efficiency Normal worse Supply air temperature balance Normal worse Supply air temperature...
  • Page 23 '19 • KX-T-336 3.4.1 Return air temperature control Same control as normal air-conditioner, RAC, PAC, KX... ■ ■ Thermo ON/OFF control : Temperature difference between R/A temperature sensor (or remote control (R/C) sensor) and set temperature by R/C. Return air (R/A) temperature control Return air sensor(Thi-A) Return air Outdoor...
  • Page 24 '19 • KX-T-336 3.4.2 Supply air temperature control • Target S/A temperature is fixed and can be adjusted by RC-E3-5 function setting. Thermo ON/OFF control : ■ Temperature difference between return air temperature sensor (or R/C sensor) and set temperature by R/C. (same as return air temperature control) Cooling : Set return air temperature must be greater than target supply temperature.
  • Page 25 '19 • KX-T-336 Information • The EEV-KIT can control supply temperature by the EEV, but the control range of the EEV is limited. • It is therefore important to select and use the correct EEV size and correct settings. • EEV control range - Min : 50 – 470 pulses 3.4.3 Supply air temperature control setting (cooling) •...
  • Page 26 '19 • KX-T-336 Target supply air temperature can be changed to ±3deg.C by indoor unit function No. 01 and 08 of RC-E3-5. STANDARD : 12–18℃ Target supply air temperature range TYPE1 : 22–28℃ [Important] RC-E4,5 have no function for No.01. For No.01 function, special RC-EX1 software is necessary.
  • Page 27 '19 • KX-T-336 The target supply air temperature can be changed to ±4deg.C by the indoor unit function No. 09 of the R/C. STANDARD : 32–40℃ Target supply air temperature range TYPE1 : 20–28℃ ★ factory default Indoor unit function Actual meaning Standard Function...

  • Page 28: Target Supply Air Temperature Adjustment (Heating Mode)

    '19 • KX-T-336 3.5 Target supply air temperature adjustment (heating mode) • This adjustment is available in STANDARD and supply air control. This adjustment cannot be used in case of TYPE1 or return air temperature control. • With SW7-2 ON this adjustment is activated. •...

  • Page 29: Automatic Supply Air Temperature Adjust Control

    '19 • KX-T-336 3.7 Automatic supply air temperature adjust control • In the case that SW7-4 is ON, when the room temperature becomes the set temperature, the target pressure is changed automatically. • Indoor unit function setting No.17 is ignored. Cooling Heating Target low pressure...

  • Page 30: Outdoor Unit

    '19 • KX-T-336 4. Outdoor unit 4.1 Target pressure adjustment The target pressure difference between an MHI indoor unit and a AHU with DXC is … 1) MHI indoor unit Adjusted for nominal indoor unit capacity 2) EEV kit Decided by AHU specification and customer’s requirement. In case of EEV-KIT, target pressure should be adjusted to the system.
  • Page 31 '19 • KX-T-336 Adjusted Image of EEV control range ( Cooling ) Not adjusted 1) Return air control 2) Supply air control Capacity Capacity T arget Return air temperature EEV pulse Supply Supply air temperature air temperature T arget Design condition EEV pulse Return air temperature 4.2 Target pressure change procedure...
  • Page 32 '19 • KX-T-336 1. Select 7-segment code by SW8 and SW9 2. Push SW7 (Data setting/deleting) more than 3 seconds. 3. 7-segment right side starts blinking. (Every 0.5 seconds) (If there is no operation for more than 10 seconds, it goes back to normal display and changed setting is cancelled.) 4.
  • Page 33 '19 • KX-T-336 • Check the outdoor unit software version by 7-segment display “98”. • It is not possible to change the pressure in case of old software versions. • Please change the outdoor unit software version if the version is older than below. Software version FDC112-155KXE6 3.501...

  • Page 34: Instruction Of How To Replace Indoor Unit Control Pcb

    '19 • KX-T-336 6. Instruction of how to replace indoor unit control PCB PCH012D015A SAFETY PRECAUTIONS Read the "SAFETY PRECAUTIONS" carefully first of all and then strictly follow it during the replacement in order to protect yourself. ● The precautionary items mentioned below are distinguished into two levels, WARNING and CAUTION. ●...
  • Page 35 '19 • KX-T-336 ⑥Function setting of wired remote control Operation messege Function No. Function description During air-conditioner stopping, push SET Set the function setting corresponding the applicable and MODE button simultaneously for over 3 model. The display changes into the function setting seconds.
  • Page 36 '19 • KX-T-336 PCH000Z420...
  • Page 38 MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD. 2-3 Marunouchi 3-chome, Chiyoda-ku, Tokyo 100-8332, Japan http://www.mhi-mth.co.jp/en/ Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. Copyright MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.

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Eevkit6-e-c/b

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