For Multiple refrigeration system EEV-KIT For Multiple refrigeration system

Contents 1. System summary 2. Function of direct expansion type air handling unit　（DX AHU） 3. Function of master EEV-Control Unit 4. Function of slave EEV-Control Unit 5. Function of outdoor unit Preliminary information, all of contents are subject to final confirmation by MHI

Direct expansion type air -handling unit 1. System summary System summary #1 Master EEV CONTROL UNIT manages total system Master EEV-KIT Master EEV Control Unit FAN 1. Basic operation can be done by remote controller (RC-E4) . 2. Central control including other KXE6 system can be done. (In such case, superlink adaptor is required.) 3. External input for switching operation mode is available. (Input signal to master EEV Control Unit) Sensor (2pcs) Return air temp. sensor Thi-A Supply air temp. sensor Thi-AF Slave EEV-KIT　#1 Slave EEV Control Unit Outdoor air Heat exchanger temp. Sensor (Thi-R1,R2,R3) Thi-A Exhaust air Sensor x 3 Return air or Outdoor air Direct expansion type air -handling unit EEV x 1 EEV-Set Strainer Strainer Superlink adaptor Outdoor unit Outdoor unit Slave EEV-KIT　#2 Return air Ｔｈｉ－ＡＦ Slave EEV Control Unit Heat exchanger temp. Sensor (Thi-R1,R2,R3) Sensor x 3 EEV x 1 EEV-Set Strainer Strainer Slave EEV-KIT　#3 RA SA Slave EEV Control Unit RC-E4 RC-E4 Heat exchanger temp. Sensor (Thi-R1,R2,R3) Sensor x 3 Central control （SC-SL3N） EEV x 1 EEV-Set Strainer Strainer Preliminary information, all of contents are subject to final confirmation by MHI

1. System summary System summary #2 Selection of return/supply air temp. control is available (by master EEV CONTROL UNIT) Air-conditioning (Air circulation) specifications Return air Outdoor Air handling unit Outdoor Unit This control system is the return air (R/A) temp. control system which is same as that for standard packaged air conditioner. Thermostat ON/OFF control is done by detecting the temperature difference between the R/A temp. (or room temp. sensed by remote controller sensor) and the set R/A temp. (room temp.) by remote controller (R/C). Cool/hot air Indoor OA processing specifications Outdoor air This control system is the supply air (S/A) temp. control system which has following 3 systems. B) Controlling No. of indoor units by detecting the temp. difference between the set S/A temp. by R/C and the S/A temp. C) Controlling the S/A temp. constant according to the set S/A temp. by R/C, and thermostat ON/OFF control is done by detecting R/A temp. D) Controlling the S/A temp. constant according to the set S/A temp. by master EEV control unit in advance, and thermostat ON/OFF control is done by detecting the R/A temp. (R/C sensor temp.). Air handling unit Outdoor Outdoor Unit Outdoor Unit Exhaust air Cool/hot air Indoor Preliminary information, all of contents are subject to final confirmation by MHI

Supplemental explanation System control　type Set temp Thermostat ON/OFF System control A : Return air temp. control R/A by R/C Set temp（by R/C）=R/A sensor System control B : Supply air temp. control S/A Set temp （by R/C） =S/A sensor System control C : Set temp+2deg =R/A sensor System control Ｄ : by PCB Set temp （by R/C） =R/A sensor Preliminary information, all of contents are subject to final confirmation by MHI

1. System summary System summary #3 Master control PCB and Slave control PCB are supplied as EEV Control Unit. That shall be installed in the control box for air handling unit at customer side. Ex: Lay out example of one master control unit and six slave control units R/C External　Control Power cable Sensor wiring Superlink signal wiring Remote controller wiring External input signal wiring 05 tapping screw Duct for sensor wire Signal wire Duct for power cable Preliminary information, all of contents are subject to final confirmation by MHI

２. Function of DX AHU ＯＡ ＲＡ ＳＡ ＲＡ ＳＡ ＋ EEV-KIT ：Slave ＲＣ RC EEV-KIT：Master EEV-KIT ：Slave EEV-Set EEV-Control ASSY EEV-Control ASSY EEV-Control Unit Sensors （3pcs） Thi-R1 Thi-R2 Thi-R3 EEV-SET Strainer EEV O/U Address 01 03 EEV-Control Unit Sensors （2pcs） ＋ Thi-A Thi-AF 2 or more refrigeration systems are connected to 1 air handling unit system which has 2 or more direct expansion heat exchanger coils. Thi-R3 Slave EEV-Control ASSY ＯＡ O/U Address 01 Thi-R2 I/U Address (EEVKIT6-E-C) 01 Thi-R1 01 ＦＡＮ Thi-A 05 Thi-AF Signal line 03 09 Master EEV-Control ASSY (EEVKIT6-E-M) 03 13 ＲＡ ＲＣ ＳＡ ＲＡ RC ＳＡ RC-E4 Preliminary information, all of contents are subject to final confirmation by MHI

２. Function of DX AHU The system composition of the DX AHU for multiple refrigeration system is as follows. (1) Master EEV Control ASSY (EEVKIT6-E-M) ①Master EEV Control Unit ②Air Sensor Assy. (Thi-A, Thi-AF) (2) Slave EEV Control ASSY (EEVKIT6-E-C) ①Slave EEV-Control Unit ②Heat exchanger Sensor Assy. 　　　　　(Thi-R1, Thi-R2, Thi-R3) (3) EEV-Set (EEV-body, -coil, 2 x Strainers) (4) Outdoor unit for KXE6 system Preliminary information, all of contents are subject to final confirmation by MHI

２.3 Master EEV-Control Unit ２. Function of DX AHU ２.3 Master EEV-Control Unit At least one set of master EEV-Control Unit is required for the DX AHU for multiple refrigeration system. Its principal functions are as follows. The window function to interconnect the building management system and the unit through superlink signal system. The function to change operation mode of the unit. The functions to control indoor fan operation, to receive control signal and to send signal for displaying on the remote controller. The function to change temperature control. The function to change multiple step control. Preliminary information, all of contents are subject to final confirmation by MHI

２.4 Slave EEV-Control Unit ２. Function of DX AHU ２.4 Slave EEV-Control Unit In response to multiple refrigeration system, some setting is required for slave EEV-Control Unit to communicate with master EEV-Control Unit. The principal settings are as follows. Select the number of salve EEV-Control Units depending on the number of refrigeration systems and of heat exchangers to be controlled, and set model capacities and addresses. Slave EEV-Control Unit controls the refrigerant flow volume according to the operation mode and operation command from master EEV-Control Unit. The refrigerant control value of slave EEV-Control Unit must be set in response to the temperature control value set by master EEV-Control Unit. Preliminary information, all of contents are subject to final confirmation by MHI

２. Function of DX AHU ２.5 Outdoor unit The outdoor unit for KXE6 system is used for DX AHU. For the multiple refrigeration system of direct expansion type air handling unit, some settings are required. Preliminary information, all of contents are subject to final confirmation by MHI

３. Function of master EEV-Control Unit J1: See item 3.9 SW5: See item 3.2 SW1-SW4: See item 3.1、2、3 SW7: See item 3.7 CnN SW6:See item 3.4、5、6 CnT2 Preliminary information, all of contents are subject to final confirmation by MHI

３. Function of master EEV-Control Unit ３.1 SW1-SW4 (Note) ・SW1-SW4 are not for address setting of master EEV-Control Unit. ・The address of master EEV-Control Unit is fixed [00] in advance so that it is no necessary to be set. Preliminary information, all of contents are subject to final confirmation by MHI

３. Function of master EEV-Control Unit ３.2 Multiple step control Multiple step control is the control to change the number of indoor unit to be operated step by step in response to the difference between set temperature and return air temperature. SW5-1 and SW5-2 : Setting steps to be controlled SW1 and SW3 : Change temp. interval to step up or down All ON [Ex. 4-step control by 1.0degC temp. interval in heating] (With 32 slave EEV-Control Unit) 32sets 1st step 24sets 2nd step *Retaining at least for 1 minute on each step. (See item 4.3.12) for changing the retaining time interval) 16sets 3rd step 8sets 4th step (All OFF) Set temp. ＋1.0 　 ＋2.0 ＋3.0 ＋4.0 ★Factory default Preliminary information, all of contents are subject to final confirmation by MHI

３.3 Switching return/supply air temp. control ３. Function of master EEV-Control Unit ３.3 Switching return/supply air temp. control By using SW2 and SW4, following 4 types of system control can be selected. ★Factory default OFF: Set 0 ON : Set other No. System control A : Return air temp. control The system will carry out thermostat ON/OFF control by detecting the temp. difference between the return air (room) temp. set with remote controller and the actual return air temp. (or the sensed temp. by R/C sensor). System control B : Supply air temp. control The system will carry out multiple step control by detecting the temp. difference between the supply air temp. set with remote controller and the actual supply air temp. System control C : Supply air temp. control The system will carry out control to keep the supply air temp. constant by the supply air temp. set with remote controller and carry out thermostat ON/OFF control by detecting the temp. difference between the set temp. and the actual return air temp. (or the sensed temp. by R/C sensor) System control D : Supply air temp. control air temp. set on the control PCB in advance and carry out thermostat ON/OFF control by detecting the temp. difference between the set temp. and the actual return air temp. (or the sensed temp. by R/C sensor). Preliminary information, all of contents are subject to final confirmation by MHI

３. Function of master EEV-Control Unit ３.4 SW6 ３.5 Hot start ★Factory default Set hot start valid/Invalid by SW6-3. What is hot start In order to prevent cold air from blowing out at the starting period of operation in heating, the fan operation is kept under the stand- by condition. However, since there is some opinion that this function is not required for the direct expansion type air handling unit, it makes possible to cancel this function with this switch. Preliminary information, all of contents are subject to final confirmation by MHI

３.6 Automatic operation control #1 ３. Function of master EEV-Control Unit ３.6 Automatic operation control #1 Automatic operation control is carried out with switching operation mode (cooling, fan, heating) automatically by detecting the temp. difference between the set temp. and the actual return air temp. By using SW6, following 3 patterns of automatic operation control can be selected. ★Factory default. Cooling Cooling Cooling Fan Fan Fan Heating Heating Heating －２ －1 ＋1 ＋２ －1.5 －0.5 ＋0.5 ＋1.5 －1 －0.5 ＋0.5 ＋1 ▲ Set temp. (Ts) ▲ Set temp. (Ts) ▲ Set temp. (Ts) Automatic operation control A Automatic operation control B Automatic operation control C Preliminary information, all of contents are subject to final confirmation by MHI

３. Function of master EEV-Control Unit ３.7 SW7 ★Factory default. SW7-1 is used for the operation check of indoor fan, before connecting refrigeration piping. Indoor fan can operate by switching SW7-1 ON. (This function is useful for prior check of indoor fan before shipment) ３.8　Supply air temp. setting at system control D Preliminary information, all of contents are subject to final confirmation by MHI

３. Function of master EEV-Control Unit ３.9 Jumper ★Factory default. In case that the air handling unit is operated as OA processing unit, the function of J1 is for comply with the requirement to keep operation of indoor fan during oil return operation in spite of defrosting in heating. The conditions to keep operation of indoor fan during defrosting in heating is following 3. If the one of following conditions are satisfied, J1 can be cut (open). If not, don’t cut (open) J1. <Conditions> ・ If the dampers are installed at the indoor heat exchangers in each refrigeration system and the damper for the system in defrosting can be shut off. ・ If the outdoor units are heat recovery units (KXRE6 models), and the defrost can be done between the indoor heat exchangers and PFD box in each refrigeration system. ・ If the height difference between the outdoor unit and indoor heat exchanger is within 20m. (Note) Max. height difference is 20m. However if the height difference exceeds 10m, 300cc of refrigerant oil shall be charged additionally on site. Preliminary information, all of contents are subject to final confirmation by MHI

３. Function of master EEV-Control Unit ３.10 External input Be sure to input with no voltage contact. It is available to change operation mode by external input signal 0 : Open (OFF), 1: Short (ON). Preliminary information, all of contents are subject to final confirmation by MHI

３. Function of master EEV-Control Unit ３.11 External output The voltage of the relay (locally provided) for output signal should be DC12V. Max. load of relay should be LY2F (Omron). Preliminary information, all of contents are subject to final confirmation by MHI

３. Function of master EEV-Control Unit ３.12 Backup operation When some trouble happens on one of refrigeration system in multiple refrigeration system, switching to backup operation is available. When a trouble happens on one of refrigeration system in multiple refrigerant systems, the system stops once. However if the setting mentioned in the following table is done by remote controller, the multiple refrigeration systems except damaged one can be operated as emergency operation with displaying “Backup” on the remote controller. ★ factory default Preliminary information, all of contents are subject to final confirmation by MHI

３. Function of master EEV-Control Unit ３.13 Change the retaining time interval to shift the controlling step at multiple step control The retaining time interval to change the number of indoor units to be controlled at multiple step control is set at one minute interval before shipment. However this retaining time interval can be changed as following table by using remote controller function setting for indoor unit function No. 02. ★ factory default Preliminary information, all of contents are subject to final confirmation by MHI

４. Function of slave EEV-Control Unit SW1-SW4：For address setting. See item 4.1 SW5: See item 4.3 SW6: For model capacity selection. See item 4.4 SW7: See item 4.5 SW1-SW4 and SW6 can be set according to the required specifications Preliminary information, all of contents are subject to final confirmation by MHI

４. Function of slave EEV-Control Unit ４.1 SW1-SW4 (Address setting) Set the address of slave EEV-Control Unit as follows. For single use: 01, 02, 03　・・・・・・・・(in series) SW3 SW4 Outdoor unit address For combination use: 01, 03, 05　・・・・・(odd number) (Note) Arbitrary No. is selectable in same manner as KXE6 01 Indoor unit address: Shall be set according to the following rule from lower order No. in series. * In ( ) shows O/U address for single use SW1 SW2 Following example shows the rule to set I/U address for multiple step control. (O/U address is for single use case) Preliminary information, all of contents are subject to final confirmation by MHI

４. Function of slave EEV-Control Unit ４.2 Address setting #1 All Slave PCB SW5-1 SW5-2 ON OFF <Example １> 01 02 05 03 09 04 13 1st step 2nd step 3rd step 4th step Slave EEV-Control x 4 4-step control 4 Refrigeration system SW5-1 SW5-2 ON OFF Master PCB <Example ２> Slave EEV-Control x 8 4-step control 4 Refrigeration system 01 03 09 02 10 1st step 2nd step 3rd step 4th step 05 04 13 06 14 SW5-1 SW5-2 ON OFF Master PCB Preliminary information, all of contents are subject to final confirmation by MHI

Don’t forget to switch SW5-1 of slave EEV-Control Unit ON ４. Function of slave EEV-Control Unit ４.2 Address setting #1 EEV-SET <Example １> 04 Slave EEV-Control x 4 4-step control 4 Refrigeration system 03 02 O/U Address Master PCB 01 SW5-1 SW5-2 ON OFF Slave EEV-Control O/U Address 04 I/U Address 13 ＯＡ 03 Thi-A ＦＡＮ Thi-AF 09 Signal line SW5 02 05 All Slave PCB Master EEV-Control SW5-1 SW5-2 00 Thi-R3 01 Thi-R2 ON 01 Thi-R1 OFF Don’t forget to switch SW5-1 of slave EEV-Control Unit ON　 ＲＡ ＲＣ ＳＡ ＲＡ RC ＳＡ RC-E4 Preliminary information, all of contents are subject to final confirmation by MHI

４. Function of slave EEV-Control Unit ４.3 SW5 ★Factory default (Note) Be sure to set SW5-1 ON, when using this EEV-Control Unit (EEVKIT5-E-C) as the slave EEV-Control Unit for multiple refrigeration system. If forgetting to set SW5-1 ON, the air handling unit for the multiple refrigerant system can not be operated. Don’t forget to set all of slave EEV-Control Units SW5-1 ON ! Preliminary information, all of contents are subject to final confirmation by MHI

４. Function of slave EEV-Control Unit ４.4 SW6 (Model capacity selection) Set the model capacity according to the heat exchanger capacity. Preliminary information, all of contents are subject to final confirmation by MHI

４. Function of slave EEV-Control Unit ４.5 SW7 Note: 1. ★ shows factory default. 2. SW7-4 should be kept OFF. Preliminary information, all of contents are subject to final confirmation by MHI

４. Function of slave EEV-Control Unit 　４.7 Switching the control method of refrigerant flow volume Switching the control method of refrigerant flow volume with SW7-3. When SW7-3 is OＦＦ, it will become return air temp. control and EEV is controlled to keep the super heat constant. When SW7-3 is OＮ, it will become supply air temp. control and EEV is controlled to keep the supply air temperature constant. Be sure to set this function in accordance with the setting of master EEV-Control Unit! Be sure to set all of slave EEV-Control Unit the same! Preliminary information, all of contents are subject to final confirmation by MHI

５. Function of outdoor unit The outdoor unit to be able to connect to the master and slave EEV-Control Unit for DX AHU is KXE6 and KXRE6 series. For Applying the outdoor unit of these series to the air handling unit for multiple refrigeration system, the following setting shall be done on the outdoor unit. Setting shall be done by using the 7- segment display function of outdoor unit. Preliminary information, all of contents are subject to final confirmation by MHI