Hisense HZX-4.0AEC Instruction Manual

AHU CONNECTION KIT
50Hz,
Power
Source
220-240V
60Hz
220V
AHU
KIT
EXPANSION VALVE BOX
CONTROL BOX
CONNECTION
P00816Q
ORIGINAL INSTRUCTIONS
HZX-20.0AEC,
HZX-30.0AEC
HZX-4.0AEC,
HZX-10.0AEC,
HZX-2.0AEC,
HZX-6.0AEC,

Declaration of Conformity
(Manufacturer’s Declaration)
Qingdao Hisense Hitachi Air-conditioning Systems Co., td. ,
17, Donghai Xi Road, Qingdao 266071,P.R. China
declares under its sole responsibility that the air conditioning models to which this declaration relates:
are in conformity with the following standard(s) or other normative document(s), provided that these
are used in accordance with our instructions:
EN 60335-1
EN 60335-2-40
EN 62233
EN 55014-1
EN 61000-3-2
EN 61000-3-3
EN 55014-2
following the provisions of:
2006/42/EC
2014/30/EU
2012/19/EU
2011/65/EU
Directives, as amended.
Manufacturing number and manufacturing year: refer to model Nameplate.
Notes:
This declaration becomes invalid, if technical or operational modifications are introduced
without the manufacturers consent.
J ohnson Controls Inc. is authorised to Compile the Technical Construction File.
Add. : Westendhof 3,45143 Essen, Germany .
Name, Surname :
Position/ Title: Director
Date: April 15, 2016
HZX-2.0AEC , HZX-4.0AEC , HZX-6.0AEC
HZX-10.0AEC,HZX-20.0AEC,HZX-30.0AEC

1
Preface
l
Do not use this product for specific purposes, such as restoring foods, animals, plants, confidential
devices and work of art.
l
Do not install the unit in the following places. Oil adhesion may cause a fire and also deformation,
breakage or corrosion of plastic parts.
* Places where oil (including machinery oil) mist and steam drift.
* Places where a lot of sulfide gas drifts such as in hot spring.
* Place where a periodical check is difficult to perform such as inside the wall.
l
Do not install the unit in the following places. It may cause corrosion.
* Places where air contains high salt contents in coast regions.
* Places with atmosphere of acidity or alkalinity.
lIn case of using a medical equipment or radio generating electromagnetic wave, pay particular attention
to unit malfunction. Do not install the unit where electromagnetic wave is directly radiated to the electrical
box in the indoor unit, remote control wiring and remote control switch. The unit should be placed at least
3m away from these equipment to avoid any radiation transmitting in the air.
l
Do not install the unit where the breeze directly catches the animals and plants. It could adversely affect
the animals and plants.

2
IMPORTANT NOTICE
: Immediate hazards which WILL result in severe personal injury
or death.
: Hazards or unsafe practices which COULD result in severe personal
injury or death.
: Hazards or unsafe practices which COULD result in minor personal
injury or product or property damage.
: Useful information for operation and/or maintenance.
It is assumed that this heat pump air conditioner will be operated and serviced by English speaking people.
If this is not the case, the customer should add safety, caution and operating signs in the native language.
lThis manual gives a common description and information for this heat pump air conditioner which you
operate as well as for other models.
This manual should be considered as a permanent part of the air conditioning equipment and should remain
with the air conditioning equipment.
Temperature (oC)
Maximum Minimum
Cooling
Operation
Indoor
Outdoor
Heating
Operation
Indoor
Outdoor
DB: Dry Bulb, WB: Wet Bulb
NOTE
CAUTION
l
Read and understand the safety summary before installing the unit.
lHISENSE pursues a policy of continuing improvement in design and performance of products. The right is
therefore reserved to vary specifications without notice.
lHISENSE cannot anticipate every possible circumstance that might involve a potential hazard.
lThis heat pump air conditioner is designed for standard air conditioning only. Do not use this heat pump
air conditioner for other purposes such as drying clothes, refrigerating foods or for any other cooling or
heating process.
lThe installer and system specialist shall secure safety against leakage according to local regulations or
standards. The following standards may be applicable if local regulations are not available. International
Organization for Standardization, ISO5149 or Japan Standard, KHKS0010.
lNo part of this manual may be reproduced without written permission.
lSignal words (DANGER, WARNING and CAUTION) are used to identify levels of hazard seriousness.
Definitions for identifying hazard levels are provided below with their respective signal words.
lIf you have any questions, contact your distributor or dealer of HISENSE.
lHISENSE’s heat pump air conditioner has been designed for the following temperatures. Operate the heat
pump air conditioner within this range.

3
CHECKING PRODUCT RECEIVED
lUpon receiving this product, inspect it for any shipping damage.
Claims for damage, either apparent or concealed, should be filed immediately with the shipping company.
lCheck the model number, electrical characteristics (power supply, voltage and frequency) and accessories
to determine if they are correct.
IMPORTANT NOTICE
Correct Disposal of this product
This marking indicates that this product should not be disposed with other
household wastes. To prevent possible harm to the environment or human
health from uncontrolled waste disposal, recycle it responsibly to promote the
sustainable reuse of material resources. To return your used device, please use
the return and collection systems or contact the retailer where the product was
purchased. They can take this product for environmental safe recycling.
The standard utilization of the unit shall be explained in these instructions.
Therefore, the utilization of the unit other than those indicated in these instructions is not recommended.
Please contact your local agent, as the occasion arises.
HISENSE’s liability shall not cover defects arising from the alteration performed by a customer without
HISENSE’s consent in a written form.

4
1 Safety Summary
lThis product is for specified use with incombustible refrigerant R410A. Use refrigerant R410A in
the refrigerant cycle. Do not charge oxygen, acetylene or other flammable and poisonous gases
into the refrigerant cycle when performing a leakage test or an air-tight test. These types of gases
are extremely dangerous and can cause an explosion. It is recommended that compressed air,
nitrogen or refrigerant be used for these types of tests.
lDo not pour water into the indoor or outdoor unit. These products are equipped with
electrical parts. If poured, it will cause a serious electrical shock.
lDo not touch or adjust safety devices inside the indoor or outdoor units. If these devices are
touched or readjusted, it may cause a serious accident.
lDo not open the service cover or access panel for the indoor or outdoor units without turning OFF
the main power supply.
lRefrigerant leakage can cause difficulty with breathing due to insufficient air. Turn OFF the main
switch, extinguish any naked flames and contact your service contractor, if refrigerant leakage
occurs.
lThe installer and system specialist shall secure safety against refrigerant leakage according to
local regulations or standards.
lUse an ELB (Electric Leakage Breaker). In the event of a fault, there is danger of an electric shock
or a fire if it is not used.
lDo not install the outdoor unit where there is a high level of oil mist, flammable gases, salty air or
harmful gases such as sulphur.
l
lDo not perform installation work without referring to this Installation Manual. If the instructions are
not followed, it may result in a water leakage, electric shock or fire.
lSecure the sufficiently strong foundation when installing. If not, it may lead to falling of the unit
and injury.
lDo not install where generation or flowing of flammable gas may be detected. It may cause a fire.
lDo not step or put any material on the product.
lWhen using refrigerant, wear leather gloves to prevent cold injuries.
lCheck the refrigerant leakage. The refrigerant R410A is incombustible, non-toxic and odorless of
HFC gas. However, if leakage occurs and gas fills a room, it may cause difficulty with breathing
due to insufficient air.
lAsk the electrical shop where the qualified electrical engineer is provided for electrical work to
avoid an electrical shock and fire disaster.
lPerform electrical work according to Installation Manual and use all relevant regulations and
standards. If not, it may cause an electrical shock or fire.
lFix the cables securely with the cord clamp. External forces on the connectors may lead to a fire.
lPower supply is turned OFF before electrical wiring work or a periodical check is performed.
lProtect the wires and electrical parts from rats or other small animals. If not, rats may gnaw at the
unprotected parts and at the worst, a fire may occur.
lPlace the expansion valve box cable away from the power source cable to avoid malfunction.
This product is designed for indoor or outdoor installation. All wires should be protected from
outdoor environment.

Children should be supervised they do not play with the appliance.
It is recommended that the room be ventilated every 3 to 4 hours.
The appliance should not be installed in the laundry.
been given supervision or instruction concerning
use of the appliance by person responsible for their safe.
5
lDo not use any sprays such as insecticide, lacquer, hair spray or other flammable gases within
approximately one (1) meter from the system.
lIf circuit breaker or fuse is often activated, stop the system and contact your service contractor.
lDo not perform installation work, refrigerant piping work, drain piping and electrical wiring
connection without referring to our installation manual. If the instructions are not followed, it may
result in a water leakage, electric shock or a fire.
lCheck that the ground wire is securely connected. If the unit is not correctly grounded, it lead
electric shock. Do not connect the ground wiring to gas piping, water piping, lightning conductor
or ground wiring for telephone.
lConnect a fuse of specified capacity.
lDo not put any foreign material on the unit or inside the unit.
lMake sure that the outdoor unit is not covered with snow or ice, before operation.
lBefore performing any brazing work, check to ensure that there is no flammable material around.
When using refrigerant be sure to wear leather gloves to prevent cold injuries.
lProtect the wires, electrical parts, etc. from rats or other small animals.
If not protected, rats may gnaw at unprotected parts and which may lead to a fire.
lFix the cables securely. External forces on the terminals could lead to a fire.
lDo not install the indoor unit, outdoor unit, remote control switch and cable within approximately 3
meters from strong electromagnetic wave radiators such as medical equipment.
lSupply electrical power to the system to energize the oil heater for 12 hours before start-up after a
long shutdown.
lDo not step or put any material on the product.
lProvide a strong and correct foundation so that;
a. The outdoor unit is not on an incline.
b. Abnormal sound does not occur.
c. The outdoor unit will not fall down due to a strong wind or earthquake.
lDo not fasten flare nut hard. It may cause breakage with aged deterioration and refrigerant leakage.
Use a specified flare nut.
l
l
l
Regarding installation altitude below 1000 metres;
Regarding transport storage temperature within
-25 55 .
workstations, all this level does not exceed 70dB(A).
The A-weighted emission sound pressure level at
Regarding frequency of supply power within Hz of
rated frequency.
°C
~
±1%
Operate the heat pump air conditioner within this range.


or lack of expericence and knowledge, unless they have
with reduced physical, sensory or mental capabilities,
The appliance is not to be used by children or person

2 SYSTEM DESCRIPTION
2.1 System Overview
AHU CONNECTION KIT is specially designed to allow connection of direct expansion coils, included a field-supplied
Air Handling Unit (AHU) to INVERTER-DRIVEN MULTI-SPLIT AIR CONDITIONER (HEAT PUMP) outdoor units for
cooling and heating applications.
AHU CONNECTION KIT is composed of Control Box for system control, where it is included the PCB and all the
electronic stuff, and Expansion Valve Box for refrigerant cycle control, where the electrical expansion valve is located.
C A U T I O N
Ti
The following figure shows an installation example for the system.
6
C A U T I O N
Multi combination with AHU and standard indoor unit, only for HZX-2.0~6.0AEC (2-6HP)
Single combination with only AHU, for HZX-10.0AEC (8-10HP)
HZX- 20.0AEC (12-20HP)

Item Description Item Description
KR H20!&2".!/&%!--2%".!00+/).$&)!/
R ;!/&%!-",!G
Q JG#$/*)!/">$->2",!G
` N)A+)3"-)/2
b L$*"-)/2
1 Outdoor unit
2 AHU CONNECTION KIT
6 AHU
5 Remote controller
7 Heat exchanger
11 Standard indoor unit
12 Control wires for electrical expansion valve
14 Control wires for AHU
18 Gas Pipe thermistor
17 Liquid Pipe thermistor
16 Inlet air thermistor
15 Outlet air thermistor
10 Outdoor-Indoor communication
CAUTION
! G$$;!%#$!5+.%3,2$!1$%*$$,!%#$!9,+%!(4!5$C+2$!*+%#!#$3%!$&2#3,-$4!3,5!%#$!$&;3,.+(,!C3)C$!1(&!'(4!%#$!;+;+,-!)$,-%#!9;!%(!H0<!I).(!
%#$!$)$C3%+(,!5+''$4$,2$!1$%*$$,!%#$!9,+%!(4!5$C+2$!*+%#!#$3%!$&2#3,-$4!3,5!%#$!$&;3,.+(,!C3)C$!1(&!09.%!1$!,(!0(4$!%#3,!J0<
! K38$!.94$!%#3%!%#$!+,.%3))3%+(,!5+.%3,2$!1$%*$$,!%#$!2(,%4()!1(&!3,5!%#$!9,+%!(4!5$C+2$!*+%#!#$3%!$&2#3,-$4!+.!.#(4%!$,(9-#!%#3%!
the thermistors sensing are not distorted.
! "#$!%#$40+.%(4!231)$!.#(9)5!,$C$4!1$!+,.%3))$5!+,!%#$!.30$!592%+,-!3.!;(*$4!(4!2(,%4()!231)$.<
The installation distance between the AHU CONNECTION KIT and the AHU must be shortest possible.
!
7
Fig.2.1 System Overview
C A U T I O N
The two Expansion Valve Boxs wire to the same terminal of Control Box
referring to chapter 5.5
Single combination with only AHU, for HZX-30.0AEC (22-30HP)

2.2 Production Lineup
AHU CONNECTION KIT is composed of Control Box and Expansion Valve Box.
Control box Expansion valve box
Control Box Model:
Expansion Valve Box Model:
Control box Expansion valve box
Expansion Valve Box Model:
8HP
4HP
2HP
6HP
10HP
KIT Model
Control Box Model:
Nom Heat
Exchanger
Capacity of
AHU
CONNECTION
AHU
Capacity
(DSW3)
Code
Setting
Expansion Valve
Box Model:
Production Lineup and Capacity
8
Control Box Model:
HZX-4.0AEC/2
HZX-2.0AEC/2
HZX-6.0AEC/2
HZX-10.0AEC/2
HZX-20.0AEC/2
HZX-20.0AEC/2 2
AHU CONNECTION KIT: HZX-2.0~20.0AEC
AHU CONNECTION KIT: HZX-30.0AEC
HZX-AEC/1
HZX-AEC/1
HZX-4.0AEC/2
HZX-2.0AEC/2
HZX-6.0AEC/2
HZX-10.0AEC/2
HZX-4.0AEC
HZX-2.0AEC
HZX-6.0AEC
HZX-10.0AEC
HZX-AEC/1

26HP
22HP
24HP
30HP
28HP
KIT Model
Control Box Model:
Nom Heat
Exchanger
Capacity of
AHU
CONNECTION
AHU
Capacity
(DSW3)
Code
Setting
Expansion Valve
Box Model:
Capacity Code (DSW3) must be set corresponding to the nom heat exchanger Capacity of the AHU.
DSW3 is located in the main printed circuit board in control box.
Production Lineup and Capacity
2.3 Accessories
Check the following content and number of accessories in the package before installation.
9
16HP
12HP
14HP
20HP
18HP
2.4 limitation of Installation and AHU
L1: the distance between the heat exchanger of AHU and the Expansion Valve for the piping length.
Keep the distance no more than 5m.
H1: the height difference between the heat exchanger of AHU and the Expansion Valve . Keep the
difference no more than 2m.
The following symbols refer to Fig.2.1 System Overview.
Limitation of Installation and Application
HZX-20.0AEC/2
HZX-20.0AEC
HZX-30.0AEC HZX-20.0AEC/2
HZX-20.0AEC/2
HZX-AEC/1
Q'ty
Name Descripon Purpose
Control Box 1 System control box
Expansion
Valve Box
2.0~20.0 : 1
22.0~30.0 : 2
Expansion valve for refrigerant
cycle control (2.5m wire)
Wired Remote
Controller
1 System seng and control
Thermistor 4
Temperature sensing:
Outlet air (red, 2.5m)
Inlet air (blue, 2.5m)
Liquid Pipe (black, 2.5m)
Gas Pipe (yellow, 2.5m)
Operaon and
Installaon manual 1 Instrucons and
important noce
AEC
AEC

Max. 0.06MPa.
3.Pressure drop of the refrigerant flow in heat exchanger :
Max. 0.15MPa.
3.Pressure drop of the refrigerant flow in heat exchanger :
1.condensation temperature:47
Heating:
Cooling:
1.evaporation temperature:7
than 10m.
L3: the Length of control wires for electrical expansion valve.The length is no more than 10m.
Ti: the suction air temperature just before the dx-coil. The temperature range:
oC
Cooling: 17 35 (WB)
23
(DB) to oC(DB)/ oC
oC
Heating: 10 27
(DB) to oC(DB)
W2: the total AHU capacity with AHU KIT to outdoor unit capacity.
For Multi combination with AHU and standard indoor unit
For Single combination with only AHU:
W1: the total standard indoor unit capacity to outdoor unit capacity.
W2: no more than 30% ; W1+W2:no more than 110%
W2: no more than 100%
Selection and Limitation of Heat Exchanger of AHU
Select the Heat Exchanger of AHU (field-supplied ) according to the technical data and limitations
mentioned below.
Lifetime of the outdoor unit, operation range or operation reliability may be influenced if you neglect
these limitations.
8HP
4HP
2HP
6HP
16HP
12HP
10HP
14HP
20HP
18HP
KIT Model
Nom Heat
Exchanger
Capacity of
AHU
CONNECTION
AHU
Capacity
(DSW3)
Code
Setting
Mode
Cooling
Heating
Min Nom Max
5.0
5.6
4.0
4.5 7.1
5.6
Allowed heat exchanger
capacity (kW) *
Heat exchanger
volume (dm )
3
Min Max
0.57 1.16
capacity
Equivalent
indoor unit
8HP
4HP
2HP
6HP
16HP
12HP
10HP
14HP
20HP
18HP
Cooling
Heating
9.0
10.0
7.1
8.0 12.5
11.2 1.03 2.37
Cooling
Heating
14.0
16.0
11.2
12.5 18.0
16.0 1.92 2.92
Cooling
Heating
20.0
22.4
16.0
17.9 25.0
22.4 2.92 3.89
Cooling
Heating
25.0
28.0
20.0
22.4 31.5
28.0 3.89 4.76
Cooling
Heating
30.0
33.5
28.0
31.5 37.5
33.5 4.76 5.91
Cooling
Heating
35.0
40.0
33.5
37.5 45.0
40.0 5.85 6.89
Cooling
Heating
43.0
47.5
40.0
45.0 50.0
45.0 6.79 8.00
Cooling
Heating
48.0
53.0
45.0
50.0 56.0
50.0 7.57 8.92
Cooling
Heating
52.0
60.0
50.0
56.0 63.0
56.0 8.47 9.97
Operation conditions Cooling Heating
8/3!!%"$)%")/-2&"&20#2%$&+%2 Da P_<O"g; PO<O"g;
WB Kb<O"g; —
I+&3!!%"$)%")/-2&"&20#2%$&+%2 Da R]<O"g; _<O"g;
WB — ^<O"g;
DaU"3%1",+-,h"=aU"62&",+-,"
F)#2"-2/?&(U"_<]"0h"#)#2"(2)?(&U"O"0<
* Cooling and heating capacity data based on the following indoor and outdoor temperature conditions:
L2 the Length of thermistor for Outlet air/Inlet air/Liquid Pipe/Gas Pipe.The length is no more
10
2.Superheat (SH) : 5 K
oC
2.Subcool (SC) = 15 K
oC
***
*
26HP
22HP
24HP
30HP
28HP
26HP
22HP
24HP
30HP
28HP
Cooling
Heating
58.0
66.0
56.0
63.0 69.0
61.5 9.04 11.13
Cooling
Heating
65.0
75.0
61.5
69.0 77.5
69.0 9.50 12.34
Cooling
Heating
71.0
79.0
69.0
77.5 82.5
73.0 10.39 12.89
Cooling
Heating
76.0
86.0
73.0
82.5 90.0
80.0 11.39 13.86
Cooling
Heating
82.0
92.0
80.0
90.0 95.0
85.0 12.36 14.73
HZX-4.0AEC
HZX-2.0AEC
HZX-6.0AEC
HZX-10.0AEC
HZX-20.0AEC
HZX-30.0AEC

lThe selected heat exchanger of AHU must be designed for R410A.The design pressure of the heat
exchanger is 4.15 MPa. The burst pressure of heat exchanger and other pipes must exceed 12.45MPa.
Insufficient strength may cause the pipes to crack and result in gas leakage.
lRefrigerant leakage rate of the heat exchanger is no more than 5g per year.
lWater content and impurity content in the heat exchanger will cause blocking of refrigerant cycle
and failure of compressor and valve. Water content in the heat exchanger is no more than 60PPM.
Impurity content in the heat exchanger is no more than 100mg.
2.5 Capacity Control Mode
Capacity control mode means the kind of capacity control by AHU CONNECTION KIT to adapt the
system performance according to the the cooling and heating load required by the user.
(1) Inlet air (room air) temperature control
detection temperature of inlet air (room air) reaches the set temperature by remote controller.
ROOM
Thermostat control: The thermostat becomes OFF if detection temperature of inlet air (room air) has
reached the set temperature by remote controller.
Capacity control: For controlling the inlet air (room air) temperature,the capacity is adapted so that
11
Installed in the return air side
ROOM
Fresh

(2) Outlet air temperature control
ROOM
Capacity control: For controlling the outlet air temperature,the capacity is adapted so that detection
temperature of outlet air of AHU reaches the correction temperature of the set temperature for outlet air
Installed just
before the dx-coil.
Thermostat control:the thermostat becomes OFF if detection temperature of inlet air and the
correction temperature of the set temperature for thermostat by remote controller has no difference.
The correction temperature of the set temperature for thermostat by remote controller is :
Cooling: the set temperature by remote controller + bb + CF
Heating: the set temperature by remote controller + b1 - CF
CF: 0 (factory setting: 00)
CF: Compensation of thermostat temperature setting,Set by remote controller in optional setting of the
oC
CF: 2 (set by remote controller: 01)
oC
CF: 5 (set by remote controller: 02)
oC
CAUTION
For controlling the Inlet air (room air) temperature, the optional setting item E1 must be set as 00
(factory setting) in optional setting of the unit by remote controller. Referring to Optional Setting
The set temperature by remote controller
Cooling:19--30
Heating:17--30
oC
oC
and Input/Output Setting (chapter 6.3) .
12
unit. Referring to Optional Setting and Input/Output Setting (chapter 6.3).
bb: -6 (factory setting: 00)
oC
bb: -4 (set by remote controller: 01)
oC
bb: -2 (set by remote controller: 02)
oC
by remote controller.
b1: +4 (factory setting: 00)
oC
b1: 0 (set by remote controller: 01)
oC
b1: +2 (set by remote controller: 02)
oC
The correction temperature of the set temperature for outlet air by remote controller is :
Cooling: the set temperature by remote controller + bb
Heating: the set temperature by remote controller + b1
bb,b1: Compensation of outlet air temperature setting ,set by remote controller in optional setting of the
unit. Referring to Optional Setting and Input/Output Setting (chapter 6.3).
CAUTION
For controlling the outlet air temperature, the compatible outdoor units are only
G, M, R, X, C series. Only single combination with AHU is allowed.
The optional setting item E1 must be set as 01 in optional setting of the unit by remote
controller. Referring to Optional Setting and Input/Output Setting (chapter 6.3) .

(3) Duty signal control
Capacity control: The capacity of outdoor unit is fixed by an external duty signal, which can be a free-voltage
Thermostat control: for system controlled by a duty signal it is possible to force thermo-off by the duty signal
itself. When the duty signal becomes lower than 8% of the full range of the signal,the system will be turned
to thermo-off condition.When the duty signal becomes higher than 14% of the full range,the system will be
turned to thermo-on condition.
and supplied to the AHU Connection Kit.The capacity of outdoor unit depends on the signal strength.
(0-5V)
＜0.4V≥0.7V
0.7V 1.0V 1.2V 1.5V 1.8V 2.0V 2.3V
(0-10V)
＜0.8V
≥1.4V
1.4V 2.0V 2.4V 3.0V 3.6V 4.0V 4.6V
(4-20mA)
Thermo-Off Thermo-On
40% 45% 50% 55% 60% 65% 70%
(0-5V) 2.6V 2.8V 3.1V 3.3V 3.6V 3.9V 4.1V 4.4V 4.7V
(0-10V) 5.2V 5.6V 6.2V 6.6V 7.2V 7.8V 8.2V 8.8V 9.4V
(4-20mA) 12.32mA 12.96mA 13.92mA 14.56mA 15.52mA 16.48mA 17.12mA 18.08mA 19.04mA
75% 80% 85% 90% 95% 100% 105% 110% 120%
Duty pnut
Capacity(% of Normal)
Duty pnut
Capacity(% of Normal)
＜5.28mA ≥6.24mA
6.24mA 7.20mA 7.84mA 8.80mA 9.76mA 10.40mA 11.36mA
signal (0~10V or 0~5V) or a current signal (4~20 mA). The duty signal is generated by a field-supplied DDC
80%
100%
120%
40%
60%
0.4V
0.8V
5.28mA
0.7V
1.4V
6.24mA
Thermo On
Thermo Off
13
The optional setting item of outdoor unit must be set as 2 for G, M, R, X series in optional function setting
of outdoor unit from outdoor unit PCB. Referring to OPTIONAL FUNCTION of outdoor unit service manual.
The set temperature by remote controller.
Cooling:19--30
Heating:17--30
oC
oC
The optional setting item of outdoor unit F2 must be set as 1 for C series in optional function setting
of outdoor unit from outdoor unit PCB. Referring to OPTIONAL FUNCTION of outdoor unit service manual.
The outlet air temperature may not reach due to outside temperature limitation and protection for outdoor units.

1.The Branch Pipe and the refrigerant pipe should be selected
coincide with the Expansion Valve Box.
2.The pipe connecting with the Expansion Valve Box should
according to the total capacity of the heat exchangers.
NOTICE
Refer to the manual of outdoor units for details.
14
Remote Control
ON/OFF Function
Cooling or H eating
Operation Mode Setting
DDC(0-10V or 0-5 V)
Referring to Optional
Setting and Input/Output
Setting (chapter 6.3) .
wire to the fan motor
Fan
Control
Fan
Control
Control
Box 1
Control
Box 2
V/A,G ND
i1,COM
i2,COM
V/A,G ND
i1,COM
i2,COM
*
Remote Controller
Branch Pipe *
CAUTION
For duty signal control, the compatible outdoor units are only G, M, R, X, C series. Only single combination
with AHU is allowed.
The optional setting item E1 must be set as 02 in optional setting of the unit by remote controller. Referring to
Optional Setting and Input/Output Setting (chapter 6.3) .
The optional setting item of outdoor unit must be set as 2 for G, M, R, X series in optional function setting
of outdoor unit from outdoor unit PCB. Referring to OPTIONAL FUNCTION of outdoor unit service manual.
The optional setting item of outdoor unit F2 must be set as 1 for C series in optional function setting of
outdoor unit from outdoor unit PCB. Referring to OPTIONAL FUNCTION of outdoor unit service manual.
The performance may not reach due to outside temperature limitation and protection for outdoor units.
As for the type of duty signal,Set the optional setting item E4 as following.
E4: 00(factory setting):0-10V
E4: 01(set by remote controller):0-5V
E4: 02(set by remote controller):4-20mA
Referring to Optional Setting and Input/Output Setting (chapter 6.3) .
The AHU Connection Kit will respond to the duty signal only after the unit is switched on by remote controller,
central controller or Remote Control ON/OFF Function (Referring to Optional Setting and Input/Output Setting
(chapter 6.3)).
The capacity of outdoor unit is controlled by its own control system instead of by external duty signal during
start running , defrosting ,restart running after defrosting.
For outdoor unit of C series the capacity of outdoor unit will respond to the duty signal with some delay
due to protection for outdoor units .
For duty signal control, the system configuration refers to System Overview(chapter 2.1) except the inlet
air thermistor is not required.
(4) Multi Connection application for one large capacity AHU
All AHU heat exchangers with same capacity and running condition belonging to one refrigerant cycle have to
be installed in the same chassis equipped with one single fan motor.
For each AHU Connection Kit, the system configuration is referring to System Overview(chapter 2.1).
All AHU Connection Kits have to be wired to the fan motor as following figure.
All AHU Connection Kits shall be connected and controlled by group with one remote controller.
The optional setting shall aplly to all AHU Connection Kits by one remote controller,referring to Optional
Setting and Input / Output Setting by Remote controller (chapter 6.1) .
A current signal (4~20 mA) of duty signal control is unavailable when multi connection application.
A free-voltage(0~10V or 0~5V) of duty signal control is available and DSW1 of PCB2 in control box shall be
turn off when multi connection application, referring to Setting of Dip Switches (chapter 7).
Combine multi AHU Connection Kits with same capacity and responding heat exchangers of one AHU in
one refrigerant cycle.

3 Transportation and Handling
• Do not perform installation work without
referring to Installation Manual. If the
instructions are not followed, it may result
in a water leakage, electrical shock, fire, or
injury from falling of the AHU connection kit.
• Do not step or put any material on the
AHU connection kit.
Transportation
(1) Transport the product to the installation
location without removing any packing
material.
(2) Do not put any material on the AHU connection
kit when transporting.
(5) Secure proper space around the AHU connection
kit for operation and maintenance work. Also a
service access door should be prepared in order
to remove the AHU connection kit without getting
rid of the ceiling plate.
(6) Select a suitable and convenient location for
the refrigerant piping connection.
• Do not install the AHU connection kit where
electromagnetic wave is directly radiated to
the control box or expansion valve box.
• Install a noise filter when noise is emitted from
power supply .
• Do not install the AHU connection kit where
generation, flowing, staying or leakage of
flammable gas may occur.
• When the false ceiling contains high humidity,
dew condensation water may occur on the outer
surface of the expansion valve box while cooling
operation. In this case, utilize the insulation on
the outer surface of the expansion valve box.
3.1
Install the expansion valve kit at least 3
meters away from the electromagnetic
wave radiator.
(1) Installation methods are selectable according
to the space .
(2) Follow the arrow direction on the expansion
valve box for installation.
(3) Keep the distance between the heat exchanger
of AHU and the expansion valve box for the
piping length up to 5m. Also the elevation
difference between the heat exchanger of AHU
and the expansion valve box must be no more
than 2m.
(4) Check the ceiling slab is strong enough. If
the ceiling slab is too weak to support the
weight of the AHU connection kit, noise and
vibration may occur.
Installation Location
3.2
The sound of refrigerant running through
the expansion valve box may be heard
Therefore install the expansion valve box
where the sound will not leak such as in
the false ceiling of a hall way.
Use ceiling material with sound-proof such
as plaster board.
3.3 Dimension Data
Control box
Expansion valve box
mm
fixing hole( 6)
f
fixing hole( 6)
f
9 Cable glands
4 fixing screws
for the control
box cover
fixing bracket
Control wires
for electrical
expansion valve
Indication of installation direction:
keep the arrow up
(7) Do not install the AHU connection kit in a
kitchen where vapor or mist flows. Dew
condensation water may occur on the
3.4 Installation Method
Control box
4 fixing screws
for control box
CAUTION
expansion valve box while cooling operation.
In this case, utilize the insulation.
(8)
(9)
Check to ensure the fixing screws and wall has
sufficient strength to hang the control box.
Service
Space
Min.500
Min.100
Min.100
Service
Space
Service
Space
15

16
S
ervice
C
ove
r
Brack
et
Fixin
g
Brack
et
Screw
(2pcs.
)
T
(Label
)
Service Cove
r
Fixing Bracket
M
in.50
M
in.50
M
in.50
(
166
)
Min.266 (False Ceiling)
1
09
Min.
300
Min.30
0
Suspension
Bol
t
P
95
S
crew
(2pcs.
)
(1) Fixing with Suspension Bolt
(R
ecommen
d
e
d)
g p
g p
Fix the fixing bracke
t
from the rear side of
unit body as shown
in the figure above
.
Fix the fixing bracke
t
from the rear side of
unit body as shown
in the figure .
(2) Fixing to Horizontal Surface
S
crew
(2 pcs.
)
Service Cove
r
Q
S
ervice
C
ove
r
(
166)
S
ervice
C
ove
r
Brack
et
Nut (Field-Supplied
)
Suspension Bol
t
Fixin
Brac
Washer
(Field-Supplied
)
Wash
er
(Field-Supplied
)
Nut (Field-Supplied
)
Fixing Bracke
t
Screw (M4
)
(Field-Supplied)
Details of
P
Details of
Q
Details of
R
Fixing
Brack
et
Plug
(Field-Supplied
)
Washer
(
3t
)
(
Field-Supplied
)
Plug
(Field-Supplied
)
Service Cove
r
Brack
et
Fixing Screw for
Service Cove
r
(
166
)
S
ervice
C
ove
r
(3) Fixing to Vertical Surface
Screw (M4)
(Field-Supplied
)
Min.30
0
Min.50
Fix the unit in the same way as the shippin
g.
1. In case a false ceiling is 266mm and more, install the unit according to (1) "Fixing with Suspension Bolt".
2. Ceiling should be strong enough to avoid vibration and noise.
3. Perform piping and wiring connection work inside of the false ceiling after suspending the unit.
Especially as for the existing ceiling, perform piping and wiring work to the connecting positions for the pipe and wirings
before suspending the unit.
4. Keep a service space and install a service access door in order to remove the service cover.
5. When refrigerant piping connection work at field site, pay attention to the connecting direction of the expansion valve box.
according to the arrow of the label as shown in the figure T.
NOTES:
Expansion valve box
3 Fixing Screws
for Service Cover
CAUTION
Installation Direction
T
Follow the arrow
direction for installation
Expansion Valve Box
Service
Space
Suspension Bolt
(W3/8 or M10)
Service
Space
Service
Space
CAUTION
Check to ensure the suspension bolt, fixing screws and plugs has sufficient strength to hang
the expansion valve box.

17
3.5 Thermistor Installation
Liquid and gas pipes thermistors
Item
PCB socket /
Thermistor
connector color
PCB
socket
number
Thermistor
length (m)
Two type thermistors are supplied inside the control
box. The purpose and identification of each one is
as follow:
Liquid pipe thermistor
Gas pipe thermistor
Black
THM5
Yellow
THM3 2.5
2.5
Location of the thermistor of Liquid pipe thermistor:
Location of the thermistor of Gas pipe thermistor:
Install the thermistor in the coldest liquid line point prior
the distributor.
Install the thermistor at the outlet of the heat exchanger
as close as possible to the heat exchanger .
In case that the thermistors supplied with AHU Connection
Kit are not long enough, please make sure that the length
extension is properly done avoiding the sensing distortion
and that the joint is properly insulated and waterproof to
avoid any electrical failure.
Fixing the thermistor:
Heat
Exchanger
Heat
Exchanger
distributor
C A U T I O N
Put the thermistor cable slightly down to avoid water
accumulation on top of the thermistor and add a
pull-relief to the thermistor cable to avoid strain on the
thermistor cable .
•
•
1 Fix the thermistor with insulating aluminum tape
(field-supplied) in order to ensure a good heat
Most sensitive
point of the thermistor
Maximize the
contact
2 Put the insulating tape (field-supplied) around the
thermistor in order to avoid loosening of the
thermistor after some years.
3 Fasten the thermistor with 2 cord clamps
(field-supplied).
4 Insulate the thermistor with the insulation sheet
(field-supplied).
Air thermistor
Two air thermistors are supplied inside the control
box. The purpose and identification of each one is
as follow:
Item
PCB socket /
Thermistor
connector color
PCB
socket
number
Thermistor
length (m)
Inlet air thermistor
Outlet air thermistor
Blue
THM2
Red
THM1 2.5
2.5
Install in location where the effects of heat sources
minimized as far as possible and inlet / outlet air
transference. Make good contact between thermistor
and pipe.
such as heat exchangers and heaters, etc. are
C A U T I O N
•
In case that the thermistors supplied with AHU Connection
Kit are not long enough, please make sure that the length
extension is properly done avoiding the sensing distortion
and that the joint is properly insulated and waterproof to
avoid any electrical failure.
•
Fix the thermistors securely with cord clamps in proper
place.
temperature can be measurable as shown in Fig.2.1.

18
4.1 Piping Materials
(1) Prepare locally-supplied refrigerant pipes.
(2) Select clean copper pipes. Make sure there
is no dust and moisture inside of the pipes.
Blow the inside of the pipes with nitrogen
or dry air, to remove any dust or foreign
materials before connecting pipes.
Do not use any tools such as a saw or a
grinder, which produce a lot of swarf.
lCautions for Refrigerant Pipe Ends
4.2 Piping Connection
(2) When tightening the flare nut, use two
spanners as shown in the figure. Ensure
that no refrigerant leakage occurs.
(3) Support the pipes with clearance towards
the axis to avoid thermal stress.
(4) Ceiling material should be strong enough.
Abnormal noise may be heard due to piping
vibration.
When installing pipe through
the wall, secure a cap at the
end of the pipe.
Correct CorrectIncorrect Incorrect
Correct Incorrect
HoleHole
Attach a cap
or vinyl tape.
Attach a cap
or vinyl tape.
Attach a cap
or vinyl bag with
rubber band.
Do not place the pipe
directly on the ground.
Rain water can
enter.
Do not fasten flare nut hard. It may cause
breakage with aged deterioration and
refrigerant leakage. Use a specified flare nut.
Regarding refrigerant piping work, vacuum
pumping work and additional refrigerant
charge, refer to the outdoor unit “Installation &
Maintenance Manual”.
0.4 ~ 0.8R
fA
fd
90o + 2o
45
o
+ 2
o
Unit: mm (in.)
Diameter
(fd) A+0
-0.4
(1/4) 6.35 9.1
(3/8) 9.53 13.2
Pipe Size Tightening
Torque
f6.35 (1/4’’) 20N.m
f9.53 (3/8’’) 40N.m
Unit
Side
Insulation Material
Cord Clamp (3 places)
Insulation for Refrigerant Pipe
Insulation for
Refrigerant Pipe
Refrigerant Pipe
• Flaring Dimension
• Required Torque • Two-Spanner Work
• Insulation on Pipes
4Refrigerant Piping Work
Connect the Expansion Valve Box to the liquid
pipe as shown in Fig.2.1.
Limitation of Installation refers to chapter 2.4.
(3) Pipe size of Expansion Valve Box.
Pipe Size
Capacity Liquid (fmm)
2HP 6.35
4-10HP 9.53
12-30HP 12.7
(1/2) 12.7 16.6
f12.7 (1/2’’) 60N.m
(1) Position of piping connection refers to chapter 3.3.
(5) After connecting the refrigerant piping, seal the
refrigerant pipes by using the insulation material
as shown in the figure (field-supplied).
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