EEV-KIT For Multiple refrigeration system. Preliminary information, all of contents are subject to...

EEV-KITEEV-KITFor Multiple refrigeration systemFor Multiple refrigeration system

Preliminary information, all of contents are subject to final confirmation by MHI 2

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


1. System summary System summary #1

RC-E4

Re

turn

air

Exhaust airOutdoor air

Outdoorunit

Thi-A

SARA

Master EEV CONTROL UNIT manages total system

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)

Superlink adaptor

RC-E4

Ｔｈｉ－ＡＦ

FANMaster EEV Control Unit

Sensor (2pcs)

Return airtemp. sensorThi-A

Supply air temp. sensorThi-AF

Master EEV-KIT

Return air or Outdoor airDirect

expansion type air -

handling unit

Outdoorunit

Central control（ SC-SL3N ）

Slave EEV Control Unit

Sensor x 3EEV x 1 EEV-Set

Slave EEV-KIT 　 #1

Heat exchanger temp.Sensor (Thi-R1,R2,R3)

StrainerStrainer





StrainerStrainer





StrainerStrainer



OA processing specifications

Selection of return/supply air temp. control is available (by master EEV CONTROL UNIT)

Air-conditioning (Air circulation) specifications

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).

Outdoor air

Exhaust 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.).

Outdoor

Outdoor

Indoor

Indoor

Return air

Cool/hot air

Cool/hot air

OutdoorUnit

OutdoorUnit

OutdoorUnit

Air handling

unit

Air handling

unit


System control 　type

Set temp

Thermostat ON/OFF

System control A : Return air temp. control

R/Aby R/C

R/ASet temp （ by R/C ） =R/A sensor

System control B : Supply air temp. control

S/Aby R/C

S/ASet temp （ by R/C ） =S/A sensor

System control C : Supply air temp. control

S/Aby R/C

R/ASet temp+2deg =R/A sensor

System control Ｄ : Supply air temp. control

S/Aby PCB

R/ASet temp （ by R/C ） =R/A sensor

Supplemental explanation



R/C

External 　 Control

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

Power cable

Sensor wiring

Superlink signal wiring

Remote controller wiring

External input signal wiring05 tapping screw

Duct for power cableDuct for sensor wire Signal wire


2 or more refrigeration systemsare connected to 1 air handlingunit system which has 2 or more direct expansion heat exchanger coils.

２ . Function of DX AHU

Thi-R1Thi-R2Thi-R3

Thi-AFThi-AＦＡＮ

ＲＣRC

EEV-Set

01 03

Slave EEV-Control ASSY

1303

0101

0501

0903

O/U Address

O/U AddressI/U Address

Master EEV-Control ASSY

(EEVKIT6-E-M)

Signal line

RC-E4

(EEVKIT6-E-C)

EEV-KIT ： SlaveEEV-Control ASSY

EEV-Control UnitSensors （ 3pcs ）

Thi-R1Thi-R2

Thi-R3

EEV-SET

Strainer

EEV

Strainer

EEV-Control UnitSensors （ 2pcs ）

Thi-A Thi-AF

EEV-Control ASSY

EEV-KIT ： Master


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



２ .3 Master EEV-Control Unit At least one set of master EEV-Control Unit is required forthe 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.



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.



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.



３ . Function of master EEV-Control Unit

CnNCnT2

SW5: See item 3.2J1: See item 3.9

SW1-SW4: See item 3.1 、 2 、3

SW7: See item 3.7

SW6:See item 3.4 、 5 、6


３ .1 SW1-SW4


Contents Remarks

SW1 Rotary switch (Blue)Changing the temperature interval formultiple step control in cooling mode

See item 4.3.2for details

SW2 Rotary switch (Blue)Switching the control by return air

temperature or supply air temperatureSee item 4.3.3

for details

SW3 Rotary switch (Green)Changing the temperature interval formultiple step control in heating mode


SW4 Rotary switch (Green)Switching the control by return air

temperature or supply air temperatureSee item 4.3.3

for details

Switch

(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.


３ .2 Multiple step control

Step control SW5-1 SW5-2None ★OFF ★OFF4-step ON OFF6-step OFF ON8-step ON ON


Set by SW1 Temp. interval Set by SW3 Temp. interval

★0 Invalid ★0 Invalid1 0.2 1 0.22 0.5 2 0.53 1.0 3 1.04 1.5 4 1.55 2.0 5 2.0

Other Nos. Invalid Other Nos. Invalid

Cooling Heating

Set temp. ＋ 1.0 　＋ 2.0 ＋ 3.0 ＋ 4.0

All ON

1st step 2nd step

3rd step 4th step (All OFF)

32sets24sets

16sets

8sets

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

[Ex. 4-step control by 1.0degC temp. interval in heating]

(With 32 slave EEV-Control Unit)*Retaining at least for 1 minute on each step. (See item 4.3.12) for changing the retaining time interval)

★Factory default


３ .3 Switching return/supply air temp. control

• 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 The system will carry out control to keep the supply air temp. constant by the supply 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).


System control SW2 SW4 RemarksSystem control A ★OFF ★OFF Return air temp. controlSystem control B ON OFF Supply air temp. controlSystem control C OFF ON Supply air temp. controlSystem control D ON ON 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.


３ .4 SW6


Switch Function ON/OFF Setting Remarks

SW6-1 ★OFF

SW6-2 ★OFF

★OFF Valid

ON Invalid

SW6-4 Rserved ★OFF Ｉｎｖａｌｉｄ Keep OFF


SW6-3 Hot startSee item 4.3.5

for details

As persetting

Automatic operation valid/invalidand switching operation pattern

★Factory default３ .5 Hot start 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.


３ .6 Automatic operation control #1


Automatic operation control pattern SW6-1 SW6-2Automatic operation control is invalid ★OFF ★OFF

Automatic operation control A ON OFFAutomatic operation control B OFF ONAutomatic operation control C ON ON

Heating

Cooling

▲

Set temp. (Ts)

－２＋ 1－ 1 ＋２

Fan

Heating

Cooling

▲

Set temp. (Ts)

－ 1.5 ＋0.5

－ 0.5 ＋1.5

Fan

Heating

Cooling

▲

Set temp. (Ts)

－ 1 ＋0.5

－ 0.5 ＋ 1

Fan

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.

Automatic operation control A

Automatic operation control B

Automatic operation control C


３ .7 SW7 Switch Function ON/OFF Setting Remarks

★OFF InvalidON Valid

★OFFON

★OFFON

OFF 3-speed

★ON 1-speed

SW7-3As per setting

See following tablefor details

SW7-1

Fan speed controlSW7-4

Check indoor fan operation

Supply air temp. settingat system control D

SW7-2


Switch Factory default Setting 1 Setting 2 Setting 3

SW7-2 ★OFF ON OFF ON

SW7-3 ★OFF OFF ON ON

Set temp. in cooling 16℃ 1 ℃４ 18℃ 12℃Set temp. in heating 25℃ 23℃ 27℃ 29℃

３ .8 　 Supply air temp. setting at system control D

★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 .9 Jumper


Jumper Function Short/Open Setting

★Short Fan operation is not available

Open Fan operation is availableJ1

Availabilty of fan operation,during oil return operation

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.

・ 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.

★Factory default.

<Conditions>


３ .10 External input Function

Terminal BlockTB2

Remarks

CnN1

CnN2

CnN3 For emergency stop 8, 9

CnI 2PFor overcurrent anomaly

of fan motor15, 16

Connector

6PFor switching operation mode

(Cooling, Fan, Heating)See following table

for details4, 5, 6, 7


No signal Cooling Heating Fan

CnN1 0 1 0 1

CnN2 0 0 1 1

SwitchOperation mode

0 : Open (OFF), 1: Short (ON).

It is available to change operation mode by external input signal

Be sure to input with no voltage contact.


３ .11 External output Contents of output information

TerminalBlock TB2 Remarks

CnM3 5POoperation command toindoor fan motor (Hi/Lo)

1, 2, 3

CnT2 5PCooling / Defrost

Oil return / Low temp.10, 11, 12,

13, 14See following table

for details

Connector


Pin No. ofconnector

Function

CnT2-1 Common

CnT2-2 Output during cooling operation

CnT2-3Output during defrosting operation for one or morerefrigeration systems

CnT2-4Output when any one of refrigeration systems startsoil return operation

CnT2-5 Output when the reurtn air temp. becomes below 0℃

The voltage of the relay (locally provided) for output signal should be DC12V.

Max. load of relay should be LY2F (Omron).


３ .12 Backup operation


When some trouble happens on one of refrigeration system in multiple refrigeration system, switching to backup operation is available.

No Function Display on R/C

★STANDARD ★Normal operation

TYPE 1 Backup operation

Actual meaning

17PRESSURECONTROL

Remote Controller function

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


３ .13 Change the retaining time interval to shift the controlling step at multiple step control


No Function Display on R/C

★STANDARD ★ 1 minute

HIGH SPEED 1 3 minute

HIGH SPEED 2 5 minutes

Actual meaning

02 FAN SPEED SET

Remote Controller function

★ factory default

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.


４ . Function of slave EEV-Control Unit

SW7: See item 4.5

SW1-SW4 and SW6 can be set according to the required specifications

SW1-SW4 ： For address setting. See item 4.1

SW6: For model capacity selection. See item 4.4

SW5: See item 4.3



４ .1 SW1-SW4 (Address setting)Contents

SW1 Rotary switch (Blue) Indoor unit address (10's)

SW2 Rotary switch (Blue) Indoor unit address (1's)

SW3 Rotary switch (Green) Outdoor unit address (10's)

SW4 Rotary switch (Green) Outdoor unit address (1's)

Switch

Set the address of slave EEV-Control Unit as follows.

01

01

SW3 SW4

SW1 SW2

Outdoor unit address

Indoor unit address:

For single use: 01, 02, 03 　・・・・・・・・ (in series)For combination use: 01, 03, 05 　・・・・・ (odd number)

(Note) Arbitrary No. is selectable in same manner as KXE6

Shall be set according to the following rule from lower order No. in series.

refrigerantsystem (*)

Indoor addressrefrigerantsystem (*)

Indoor address

No.1 (01) 01, 02, 03, 04 No.5 (05) 17, 18, 19, 20

No.2 (02) 05, 06, 07, 08 No.6 (06) 21, 22, 23, 24

No.3 (03) 09, 10, 11, 12 No.7 (07) 25, 26, 27, 28

No.4 (04) 13, 14, 15, 16 No.8 (08) 29, 30, 31, 32

Following example shows the rule to set I/U address for multiple step control. (O/U address is for single use case)

* In ( ) shows O/U address for single use



４ .2 Address setting #1<Example １>

0101

0205

0309

0413

1st step 2nd step 3rd step 4th stepSlave EEV-Control x 4 4-step control 4 Refrigeration system

SW5-1

SW5-2 ON

OFF

Master PCB

All Slave PCB SW5-1

SW5-2

ON OFF

Slave EEV-Control x 8 4-step control 4 Refrigeration system 01

010309

0102

0310

1st step 2nd step 3rd step 4th step

0205

0413

0206

0414

SW5-1

SW5-2 ON

OFF

Master PCB

<Example ２>


４ . Function of slave EEV-Control Unit ４ .2 Address setting #1

Thi-R1Thi-R2Thi-R3

Thi-AFThi-A ＦＡＮ

ＲＣRC

04

03

02

01

1304O/U Address

I/U Address

0903

0101

0502

O/U Address

EEV-SET

Master EEV-Control

Slave EEV-Control

RC-E4

Signal line

Slave EEV-Control x 4 4-step control 4 Refrigeration system

00

SW5

SW5-1

SW5-2 ON

OFF

Master PCB

All Slave PCB SW5-1

SW5-2

ON OFF

Don’t forget to switch SW5-1 of

slave EEV-Control Unit ON 　

<Example １>



４ .3 SW5Switch

★OFF for single refrigeration system

ON for multiple refrigeration system

★OFF Invalid

ON Valid

Contents

SW5-2Indoor address setting

(100's)

Switching PCB settingfor single/multiple

refrigeration systemSW5-1

★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 !



P22 P28 P56 P71 P140 P224 P280

SW6-1 OFF ON OFF OFF OFF OFF ON

SW6-2 OFF OFF ON OFF OFF ON ON

SW6-3 OFF OFF ON OFF ON ON ON

SW6-4 OFF OFF OFF ON ON ON ON

Model capacitySwitch

４ .4 SW6 (Model capacity selection)Set the model capacity according to the heat exchanger capacity.



４ .5 SW7

Switch Function ON/OFF Setting Remarks

★OFF Normal

ON Test run

★OFF Normal

ON +15degC setting

★OFF Return air temp. control

ON Supply air temp. control

★OFF

ON

same function forKXE6 indoor unit

SW7-1

Switching the control methodof refrigerant flow volume

ReservedSW7-4

SW7-3

Test run for drain motor

+15degC setting at supply airtemp. control in heating


Keep OFF

SW7-2


Note:

1. shows factory default.★

2. SW7-4 should be kept OFF.



　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 O ＦＦ , it will become return air temp. control and EEV is controlled to keep the super heat constant.

• When SW7-3 is O Ｎ , 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!


• 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.

５ . Function of outdoor unit

EEV-KIT For Multiple refrigeration system. Preliminary information, all of contents are subject to...

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Transcript of EEV-KIT For Multiple refrigeration system. Preliminary information, all of contents are subject to...