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2. Introduction of DVM AHU KIT

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◇ Contents
Ⅰ. Summary of DVM AHU
1. What is DVM AHU? -----------------------------------------2. Introduction of DVM AHU KIT ------------------------------
4
9
Ⅱ. Business Process
1.
2.
3.
4.
Biz Process for AHU Kit Application -----------------------On Site Verification Process for 1st Job Site --------------Warranty & Responsibility ----------------------------------Quality Guidance ---------------------------------------------
14
15
16
17
Ⅲ. Technical Specification
1.
2.
3.
4.
5.
Line-Up ------------------------------------------------------Capacity Table for AHU & outdoor unit combination ---Heat Exchanger Design Guide -----------------------------Install Guide ------------------------------------------------Install Example -----------------------------------------------
19
22
23
26
39
Ⅳ. Control Solution
1.
2.
3.
4.
Line-Up ------------------------------------------------------Basic Control ------------------------------------------------Communication Wire Installation -------------------------Control Connection ------------------------------------------
46
47
52
56
Ⅴ. Trouble Shooting
1.
2.
3.
4.
5.
AHU-KIT Temperature sensor OPEN/SHORT error -------Fan Error -----------------------------------------------------Error at the beginning of operation------------------------Error during operation---------------------------------------Other Cases----------------------------------------------------
61
62
63
64
65
Ⅵ. Notice
1. Senor Installation -----------------------------------------2. Communication Wire Installation -------------------------3. Caution about Installation -----------------------------------
67
68
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2
DVM AHU 개요
DVM Air Handling Unit
Ⅰ. Summary of DVM AHU
3
DVM AHU 개요
DVM Air Handling Unit
Ⅰ. Summary of DVM AHU
1. What is DVM AHU?
DVM AHU is Direct-expansion type heat-pump air-conditioning system. The
outdoor units(DVM Plus III and IV) can combine with AHU. When AHU combines
with high-tech DVM outdoor, it can control ventilation, humidity, cooling and
heating under high-ceiling or large areal condition in one package.
Air
Air
Air Duct
① Outdoor Unit
ventilation, humidification, air-cleaning
③ AHU KIT
② Indoor Unit(Local supply)
1-1 DVM AHU Composition
DVM AHU is composed largely Indoor and Outdoor parts. Outdoor is system air
conditioner and indoor is AHU and AHU-KIT.
1) Outdoor : System air conditioner outdoor unit
◦ DVM PLUS III and Ⅳ
2) Indoor : Air conditioner(Local supply)
◦ air conditioner, blower
◦ direct-expansion type heat-exchanger
◦ humidifier, cleaner and accessories
3) AHU KIT
◦ PCB, EEV, Thermo sensor(Eva In/Out, Air), EEV Coil, accessories
4
DVM AHU 개요
DVM Air Handling Unit
1-2 Outdoor Part
Combinable outdoor units with DVM AHU are DVM PLUS III/IV
DVM PLUS III
DVM PLUS Ⅳ
Heat-pump
Heat-pump
1-3 Indoor Unit(AHU)
Components of Indoor Unit(AHU) are blower fan, heat-exchanger, casing, motor,
filers and dampers.
R.A.
Damper
Base
Return
Fan
E.A.
Damper
O.A.
Damper
Frame
(Profile)
Coil &
B.P
Casing
Eliminator
Damper
Pre & Medium
Filter
Corner Joint
(Connection Mold)
Motor
Supply Fan
5
DVM AHU 개요
DVM Air Handling Unit
1-4 AHU Air Flow Diagram
The air flow of DVM AHU is below. Combinable outdoors with DVM AHU are DVM
PLUS III, IV residential DVM SLIM/Home/Mini are not combinable.
DUCT
SA
RA
SA
RA
SA
RA
exhaust
DUCT
fresh air
Return Air
air supply
refrigerant pipe
DVM PLUS III
DVM PLUS Ⅳ
6
DVM AHU 개요
DVM Air Handling Unit
1-5 Major Components of Air Conditioner
Class
Fan
Blower
Heat
Exchanger
(Coil)
Image
Specification
- High efficiency AIR FOIL blower.
- Small models are produced by Pittsburgh Lock method
(non-welding method).
- Bigger models are produced by welding method.
- Easy maintenance Taper Bush Pulley.
- FIN : Aluminum hydrophilic 0.14 ㎜t
- Tube : Copper 9.52Φ × 0.7 ㎜t
- Header : Copper
- Frame : galvanized steel sheet 2.0 ㎜t
- Achieve perfect contact between tube and fin with
mechanical expansion method.
- Leakage test: 4.15MPa
Casing
- Effective soundproof, thermal-insulated and flameretardant urethane-foam dual panel
- Inserted middle-mold prevent the air leakage between
panels
- Easy assemble and disassemble because of clamp
assemble
- Elegance look, using the color steel panels
- Outer panel color: Blue(Munsell Number: 4.3PB 3.1/9.6)
Motor
- Totally Enclosed, Fan-Cooled (TEFC) motor .
 Prevent foreign substance larger than 1mm diameter.
 Cooling fan is installed to improve cooling efficiency.
Filter
Damper
-Low pressure drop, easy to maintain
-Pre Filter : AFI 60~80% (flame-retardant)
Medium Filter : NBS 60~80% (compact type)
-
AMCA SEAL certified
Opposed blades create smooth airflow
Low pressure drop, Air Tight Type
Dual AIR FOIL aluminum blade
※ AHU Components depend on the local supply maker’s specification.
7
DVM AHU 개요
DVM Air Handling Unit
1-6 Standard Specification of Air conditioner Components
Parts
Standard
Air Foil Fan
Air Foil Double Suction
Depends on customer’s requirement.
(ex. Plug FAN)
Multi Blade Fan
Sirocco Double Suction
Depends on customer’s requirement.
(ex. Plug FAN)
3Phase
Induction Motor
TEFC(IP: 44, Insulation class: F)
High efficiency, Inverter, etc
Outer Plate
Color Steel Plate 0.5㎜
1.0t~1.6t(SPHC, GAL, STS), etc
Inner Plate
Color Steel Plate 0.5㎜
0.6㎜ GAL, 0.5㎜ STS, etc
Insulation
Urethane Foam 30K, 48±2㎜
GLASS FIBER + CLOTH 50㎜, etc
Frame
AL. Mold Bar
Corner Joint
3-Brench Leg(Strong Plastic)
Channel
SS400([100x50x5.0㎜)
Steel Plate
SPHC 1.6㎜
Drain Pan
STS 304 1.5t(Artilon Base insulation
25㎜)
Drain Socket
40A(Stainless)
TUBE
COPPER(OD 3/8" x 0.7T)
FIN
AL.-FOIL(0.14T)
HEADER
COPPER(AHU SPEC)
FRAME
SPG(2.0㎜)
1.5㎜ STS, 2.0㎜ STS, etc
Depends on customer’s requirement.
Electric Heating Coil, Steam Heating Coil,
Hot Water Coil
Pre Filter
Unit Type 20㎜
Chemical Filter, UV Lamp, etc
Medium Filter
Mini Pleat Type 75㎜
Air Tight
Damper
Opposed Blade
liner Damper
Depends on customer’s requirement.
Electric-electrode, Electric Element Steam,
Steam Injection
Fan Motor Local Panel
Auto control (Damper, Humidity, UV Lamp),
Connect with Disaster Prevention
FAN
Motor
Casing
Base
Coil
Sub
Heating
Coil
Air Filter
Damper
Humidifier
Swich
Box
Nonstandard
Motor Control
Box
SPG SQUARE PIPE(Outdoor), Low-Temp
Mold Bar
1.6㎜ GAL, 1.5㎜ Stainless Steel
Bag Filter, HEPA Filter
※ AHU Components depend on the local supply maker’s specification.
This table is basic guideline of installation.
8
DVM AHU 개요
DVM Air Handling Unit
2. Introduction of DVM AHU KIT
The EEV(pipe)/PCB control KIT which combines System Outdoor Unit(DVM
PLUS III, IV) with AHU.
2-1 Main Components of AHU KIT
The Major components of AHU KIT are EEV and PCB
2-2 Accessory
Accessories are In/Out Pipe Sensor, Sensor Holder, Sensor Clip, EEV Coil,
Aluminum Tape, Rubber Tape, Insulator, Cable-Tie.
(※ Wired Remote Controller is optional)
9
DVM AHU 개요
DVM Air Handling Unit
2-3 Main Operation
1) EEV(Electronic Expansion Valve)
◦ EEV(Electronic Expansion Valve) controls the refrigerant flow rate.
2) PCB(Controller)
◦ PCB can control 2.5~10Hp in individual or combination operation.
◦ PCB controls refrigerant flow rate by EEV and communicate with outdoor unit
and wired remote controller.
◦ PCB generates contact signal to operate AHU fan.
◦ Terminal block 1, 2 generate contact signal(AC 220V).
It turns on the fan in cooling/heating/blowing mode.
The output is contact signal and it cannot be used as power source of fan operation.
2-4 Components Specification
Component
AHU KIT
EEV
- Capacity : 2.5 ~ 10Hp
PCB
- Capacity : 2.5 ~ 100HP(combination)
Coil length
- EEV : 10m
- Eva In/Out Sensor : 10m
1) Wired remote controller contains temperature sensor.
Room Sensor 2) 4~20mA(DC input)
※ Room temperature sensor is included in AHU KIT.
10
DVM AHU 개요
DVM Air Handling Unit
2-5 AHU KIT Structure Diagram
1) Individual Installation
Communication F1, F2
External Controller
(Field supply)
EEV Kit
Simple BMS
(Field supply)
EEV Control
Evap_in
Sensor
Supply Air
Fresh Air
Exhaust Air
Return Air
Liquid pipe
Room
Sensor
Remote controller
Gas pipe
Evap_out Sensor
• Sensors have to be insulated properly.
• EEV Kit has to be installed in a vertical direction
• Do not install SIMPLE BMS in parallel with external controller(MIM-B14).
• When the controllers (External Controller, simple BMS, Remote Controller) are installed
simultaneously,
AHU-KIT doesn’t have the priority of control and operates according to the final signal.
(SIMPLE BMS may indicate the different condition of AHU, if AHU was controlled by
other controller finally.)
11
DVM AHU 개요
DVM Air Handling Unit
2) Module Installation
External Controller
(Field supply)
Communication F1, F2
Communication F1, F2
EEV
Kits
40HP
Simple BMS
(Field supply)
40HP
Fresh Air
Return Air
Exhaust Air
Liquid pipe
Eva_in Supply Air
Sensor
Room
Sensor
Gas pipe
Eva_out Sensor
Remote controller
• Sensors have to be insulated properly.
• EEV Kit has to be installed in a vertical direction
• Do not install SIMPLE BMS in parallel with external controller(MIM-B14).
• When the controllers (External Controller, simple BMS, Remote Controller) are installed
simultaneously,
AHU-KIT doesn’t have the priority of control and operates according to the final signal.
(SIMPLE BMS may indicate the different condition of AHU, if AHU was controlled by
other controller finally.)
12
DVM AHU 개요
DVM Air Handling Unit
2-6 DVM HR + AHU KIT
Possible Risk
If AHU is designed out of the guideline there will be insufficient capacity, because the
system can miscalculate the operation mode in mixed operation mode.
1
Ex) When AHU is 2.5HP but the components are over 5HP, the system could operate maincooling mode while it have to operate main-heating mode and vise versa. In this case,
discharge pressure cannot reach to sufficient level and it will cause heating capacity drop in
ordinary indoor unit(in the opposite case can cause cooling capacity drop in ordinary indoor
unit)
Incorrect room temperature sensor installation can cause miscalculation of operation
mode(main heat/cool). Consequently, it can cause capacity decline.
2
Ex) In heating operation, room temperature is 25℃, outdoor temperature is 2℃. If the indoor
room temperature sensor is installed inside of the room(measuring 25℃), the real AHU heatexchanger inlet air temperature could be 2℃(under the condition of large fresh air ratio).
DVM PLUS III and IV HR use the room sensor temperature as the calculation factor of
cooling and heating load. Therefore, AHU decides the heat-exchanging temperature as
25℃ and the load is calculated as lower than its actual load.
If AHU's capacity is relatively higher, the outdoor unit's mode can be changed as main
cooling ↔ main heating. This situation can lead frequent compressor 3-minute delay and the
capacity decline of other indoor units.
3
Ex) Outdoor unit is 14HP, AHU is 10HP cooling operation, one 4Way Cassette is 2HP
cooling operation, one 4Way Cassette is 2HP heating operation. Outdoor unit's mode
change is occurred by AHU's thermo on/off(compressor 3-minute delay) and it leads the
other indoor units' capacity drop.
HR's minimum operating temperature is 16℃
4
Ex) If outdoor temperature is 0℃, indoor temperature is 20℃ and fresh air ratio is over 50%,
the actual heat-exchanging temperature will be 10℃. It will be out of guaranteed operation
range.
Design Guide
1
2
3
4
Follow the Hardware choice guide. The guide is same as heat pump but in case of HR the
risk is higher than heat-pump if the guideline is not conformed. It affects not only to the AHU
but also the other ordinary indoor units.
Room sensor must be installed on the path of inlet air(return air + outdoor air).
Indoor temperature dependent on/off should be controlled by separated controller.
If separated on/off controller is installed, the on/off Hysteresis must be more than 2℃(3℃ is
recommended). If AHU and ordinary indoor units are installed together, AHU's capacity must
not exceed 50% of the total capacity
Maintain the heat-exchanger inlet air temperature above 15℃ by adjusting the refresh air
ratio.
Design AHU as the refresh air ratio is below 30%.
13
Process
DVM Air Handling Unit
Ⅱ. Business Process
14
DVM Air Handling Unit
Ⅱ. Business Process
Process
1. Biz process for AHU Kit application
■ Samsung HQ : Supplying AHU Kit to Qualified Distributors
■ Subsidiary or Distributors : Sales / Design (DVM+AHU) / Installation / Service
■ Before starting business process, checking the conformation of the AHU company
is necessary
Design DVM System
· System Layout
· Wiring Method
· Controls & Solution
Biz Boundary
Subsidiary or
Disty
Samsung
[HQ]
(1)
(2)
(3)
Sales
By Disty
Delivery
(7)
SVC
By Installer
· Suwon HQ  Subsidiary 
Qualified Disty
Design HVAC System
· System Layout
· AHU Spec & Maker
· Duct Work
(4)
Design
DVM System
By Disty
(6)
Design AHU
By Local
Consultant
(5)
Install
AHU+DVM
By Installer
Commissioning
By Disty (HQ)
Installation AHU & DVM Disty
. DVM : DVM Installation Manual
. AHU : Guide by Disty
. Monitored by Disty
Commissioning (T.A.B)
· Feed back commissioning result to Subsidiary
· On 1st Site Verification by HQ per each Disty
·Supported by Disty regarding DVM
15
DVM Air Handling Unit
Process
2. On site verification process for 1st job site
■ Target : 1st Job site of new Distributors
■ Check Points : Sales & Design guide / Commissioning check list / S-net data
1st Job site to be
qualified Disty
HQ Marketing / SE
HQ Marketing / SE
SE
NG
Need
Verifying Test
Sales & Design GUIDE
No Need
HQ Marketing / SE
SE
NG
Commission CHECK LIST
OK
S-NET DATA
NG
OK
OK
HQ SE/R&D/QA
Request
Improving
Request
Improving
NG
OK
OK
※ S-Net back up data
NG
HQ SE/R&D/QA
Qualified
Root Cause Analysis
HQ Marketing
SE
OK
Drop AHU Biz
Request Improving
16
DVM Air Handling Unit
Process
3. Warranty & Responsibility
■ DVM AHU Kit is special case in Samsung A/C Business
- Design and application with other company’s products
- Quality problems resulting from wrong design and bad installation
- Too difficult to make the boundary of responsibility
■ All Distributors must submit special contract to sell AHU KIT
1) Distributors has to take whole responsibilities of AHU application
- Any Customer Claim from the poor Cooling/Heating/Dehumidifying performance
(Which are the major Air Conditioning functions) from this application
- Any Fire and electrical accidents caused from this application.
- Any labor and component cost from this application for any Samsung non-sealed
or Sealed caused.
2) Distributors has to report the following items below.
- All the information of the site location, usage, purpose of this application.
- All the technical/SVC/Troubleshooting on-going information.
- Technical Feedback (All good and bad aspects)
17
DVM Air Handling Unit
4. Quality Guidance
Item
Drawing
Site
Process
4-1 Quality Guidance Item
Check Point
Responsibility
Combination Table
- Obedience of Standard Combination
AHU Distributor
AHU KIT Quantity
- Purchase Quantity. & Site Quantity
AHU Distributor
Heat Exchanger Spec.
- Standard Heat Exchanger Spec.
AHU Distributor
Sensor
- Sensor install position and method.
AHU Distributor
EEV
- Install Condition
AHU Distributor
Defrosting KIT
- Install Condition
AHU Distributor
Additional Refrigerant
- Mark on AHU / Refrigerant Charge
PCB BOX
- Using proper PCB Box
Installer
AHU Distributor
18
DVM Air Handling Unit
Tech Spec.
Ⅲ. Technical Specification
19
DVM Air Handling Unit
Ⅲ. Technical Specification
1. Line-Up
1-1 Line-Up from 2.5HP to 40HP
Outdoor
5HP
7.5HP
10HP
20HP
30HP
40HP
1EA
1EA
1EA
1EA
2EA
3EA
4EA
Std.
17.5
35
52.5
70
140
210
280
Min
15.8
32
47.3
63
126
189
252
Max
21
42
63
84
168
252
336
Std.
0.14
0.28
0.41
0.55
1.10
1.65
2.20
Min
0.13
0.25
0.38
0.50
1.00
1.50
2.00
No. of
AHU KIT
Air flow
rate
(CMM)
AHU
Facial
area
(㎡)
Tech Spec.
DVM
2.5HP
Capacity
AHU Kit : MXD-A16K1X025A / MXD-A22K1X050A / MXD-A22K2X075A / MXD-A22K2X100A
10HP
Liquid Pipe
AHU
KIT
Gas Pipe
20HP
Liquid Pipe
AHU
KIT
Gas Pipe
20
DVM Air Handling Unit
1-2 Line-Up from 50HP to 100HP
DVM
Capacity
No. of AHU
KIT
Air flow
rate
(CMM)
AHU
Facial
area
(㎡)
50HP
60HP
70HP
80HP
90HP
100HP
DVM
5EA
6EA
8EA
8EA
9EA
10EA
Std.
350
420
490
560
630
700
Min
315
378
441
504
567
630
Max
420
504
588
672
756
840
Std.
2.75
3.30
3.85
4.40
4.95
5.50
Min
2.50
3.00
3.50
4.00
4.50
5.00
Tech Spec.
Outdoor
AHU
Note : Above 60HP, 2 module systems are to be applied like the below
30HP
Liquid Pipe
Gas Pipe
AHU
KIT
AHU
KIT
30HP
Liquid Pipe
Gas Pipe
21
DVM Air Handling Unit
1-3 Applicable AHU Kits
Item
AHU KIT
Tech Spec.
EEV
2.5/5Hp
7.5/10Hp
PCB
※ Capacity: 2.5~100HP(Combination)
Coil Length
- EEV : 10m
- Eva In/Out Sensor : 10m
EEV
PCB
Components
1) Wired remote controller contains temperature sensor.
Room Sensor
2) 4~20mA(DC input)
※ Room temperature sensor is included in AHU KIT.
22
DVM Air Handling Unit
Tech Spec.
2. Capacity Table for AHU & outdoor unit combination
23
DVM Air Handling Unit
3. Heat Exchanger Design Guide
3-1 Heat Exchanger Design
Air Flow Volume
Outdoor Capacity
(HP)
Face
Area
10
20
30
40
50
60
70
80
Std.
(CMM)
35
70
140
210
280
350
420
490
560
Min.
(CMM)
32
63
126
189
252
315
378
441
504
Max.
(CMM)
42
84
168
252
336
420
504
588
672
Std. (㎡)
0.28
0.55
1.10
1.65
2.2
2.75
3.30
3.85
4.40
Min. (㎡)
0.25
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
Tech Spec.
Air
Volume
5
No. of Coil Row
Face Area
Std. 0.55㎡ (Min. 0.50㎡) / 10HP
Std. 4Row (Max 6Row)
Fin Pitch
Face Velocity
2.0 ~ 2.8 m/sec
1.9mm↓ (13FPI↑)
Face Area
Face Velocity
※ Note
- Standard air volume is 70CMM based on 10HP capacity (Cooling : 28kW/h)
- All recommended parameter are based on Φ9 diameter heat exchanger.
24
DVM Air Handling Unit
3-2 Check Point and Recommanded Example
Check Point
5.
6.
No. of rows : Standard 4 , maximum 6
Pressure resistance up to 4.1M Pa
HEX (Split, Inter-winded)
Facial velocity : Around 2.0 m/sec, considering bypass factor based
on its velocity
Evaporating temperature : 11℃ (*Capacity table provided for the
given conditions )
App. 10~15% Heat loss from delivery system such as AHU, Fan and
Duct
Tech Spec.
1.
2.
3.
4.
Recommended Hex spec. for 10HP AHU
1) Tube : 9.52Φ, 0.7t, Bared tube
2) Tube Array : 4row-30step, L 900mm
3) Fin : Waffle Louver, Fin Pitch 1.85
4) Liquid Pipe : 9.52Φ
5) Gas Pipe : 22.7Φ
25
DVM Air Handling Unit
3-3 HEX Manufacturing (Split type vs. Inter-winded)
AHU Kit 1
Air flow
Case.1 Single module is applied to
AHU, then it is possible to design
“split type” heat exchanger. The
best is to design their passes
evenly in terms of heat transfer
Tech Spec.
AHU Kit 2
HEX 1
HEX 2
Air flow
AHU Kit A
(AHU 1+2)
AHU Kit B
(AHU 3+4+5)
Case.2 2 modules are applied
to AHU, then it is not
possible to design “split
type” heat exchanger,
instead surely to design
“inter-winded type” heat
exchanger to maximize
heat exchange efficiency
HEX A+B
26
DVM Air Handling Unit
4. Install Guide
4-1 EEV(Electronic Expansion Valve Installation
Tech Spec.
 AHU Kit have 4 types of capacity.(MXD-A16K1X025A / MXD-A22K1X050A /
MXD-A22K2X075A / MXD-A22K2X100A)
Dew could be generated on the EEV and its neighbor. Need to be installed at
drainable place.
 EEV Kits have to be installed in vertical direction within 90+-15’ range
- Specification
. Good application for various range of AHU
. Filter (Assy inside)
. Two EEV for 7.5 / 10HP AHU Kit, One EEV for 2.5 / 5HP AHU Kit
. Eva In / Out sensor
* Need the space for EEV & pipe part in AHU inside
27
DVM Air Handling Unit
Tech Spec.
4-2 PCB(Controller) Installation
1. Control box including PBA should be installed outside of AHU in order to
avoid a possible damage from moisture which is generated by controlled
humid air.
2. Control box should be waterproof and fireproof also avoid direct sunlight
on the PCB.
28
DVM Air Handling Unit
4-3 Sensor Installation
Install the Eva-In sensor on the coolest pipe after the distributer in cooling mode.
Install the Eva-Out sensor on the pipe 200mm far from the Header.
The pipe sensors should have to be insulated in order not to be affected by air-flow.
Install the Room sensor on the way of room air inlet. It must not contact with
moisture or pipe.
5. Room sensor must be installed on the path of inlet air(return air + outdoor air).
In order to apply controller refer to indoor-temperature, use separated controller.
Tech Spec.
1.
2.
3.
4.
1. Braze the sensor-holders at location suggested above and fix the each
sensor with sensor clip.
2. IN/OUT sensor should be installed where temperature of heat exchanger
can be measured accurately.
29
DVM Air Handling Unit
4-4 Example of Sensor Installation
1) Check the sensor and sensor holder.
Sensor
OD(mm)
Sensor holder
ID(mm)
Wire
Color
IN sensor
Φ6
Φ6.8
Red
OUT Sensor
Φ7
Φ7.8
Black
Tech Spec.
Type
2) Braze the sensor holder on the selected location of the pipe.
Sensor attachment method.
• Choose the location where temperature can be
measured correctly.
• Try to attach closely to the contact surface before
brazing.
• Distinguish IN/OUT sensor and attach it.
(IN/OUT sensor size is different.)
3) Insert sensor and the sensor clip in
the sensor holder.
4) Bend end of the sensor clip to
fix the sensor.
5) Attach the insulator around the sensor
Be aware not to cross install the
sensors in module installation
30
DVM Air Handling Unit
4-5 Brazing the Pipe
1) Use Nitrogen gas when brazing the pipes as shown in the picture.
2) If you do not use Nitrogen gas when brazing the pipes, oxide may form inside
the pipe. It can cause the damage of the compressor, valves.
3) Adjust the flow rate of the Nitrogen gas with a pressure regulator to maintain
Tech Spec.
0.05m3/h (0.02Mpa) or less.
•
Make sure that there is no moisture inside the pipe.
•
Make sure that there are no foreign materials and impurities in the pipe.
•
Make sure that there is no leak.
•
Be sure to follow the instruction when brazing the pipe.
31
DVM Air Handling Unit
4-6 Additional Refrigerant Calculation Method
The quantity of additional refrigerant is decided by the size of AHU's heat-exchanger.
A = L * R * S * U * 0.022
A: additional refrigerant [kg]
L: heat exchanger length[m]
R: the number of heat exchanger raw
Tech Spec.
S: the number of heat exchanger step
U: the number of AHU
After the calculation, the label of additional refrigerant quantity has to be attached.
※ The contents on the label
ex) (60HP(30HP×2EA) & additional refrigerant is 14kg
"The additional refrigerant is 14kg. Therefore, charge additional 7kg refrigerant
in each module."
◎ Calculation example
3
2
※ AHU Heat Exchanger Size
◦ Length : 2.2m, ◦ Step : 72, ◦ Rows : 4
▷ Additional Refrigerant
= (Length × Step × Rows) × 0.022
(2.2 × 72 × 4) × 0.022 = 14kg
※ With 1 AHU unit combines with 60HP outdoor. Add 7kg refrigerant in each
30HP outdoor unit.
32
DVM Air Handling Unit
4-7 AHU Fan On/off control & its feedback
Item
Details
 Signal for On / off
- AHU is turned on / off by signal from
fan motor connecter on PBA of AHU kit
Operation
Tech Spec.
- On / Off of AHU system shall be operated by AHU kit
 Monitoring the electrical status of
AHU Fan motor winding
-PBA (at Float switch connector) is checking
the status that the motor winding is powered on or not
Motor
signal feed back
- If electric power is not supplied on the motor winding,
relay 2 will be off and AHU will be in error mode
(float switch open error)
Concept
AHU Blower
(Fan)
Power for AHU motor
relay1
relay2
Feed Back
On/off
signal
EEV
Fan motor connecter
sensors
: 230V 50Hz
AHU Kit (PBA included)
33
DVM Air Handling Unit
Tightening torque
1. Turn off the power before connecting the power terminal.
(kgf•cm)
2. Maximum cable length and the amount of voltage drop for AHU
M4
12.0~14.7
power/communication cables should be under 10%.
3. Consider power usage of the AHU when installing the ELB.
4. Connect V1, V2 on AHU-KIT PBA to the power line (V1, V2) on wired remote
controller.
5. Connect F3, F4 on AHU-KIT to the communication line (F3, F4) on wired
remote controller.
6. Use the appropriate tools for wiring and make sure to connect them tightly
within the
7. tightening torque to withstand the external pressure. Arrange the wires so that
cover
8. or other parts does not get loose. They may cause overheating, electric shock
or fire.
9. Connect the power cable to the ELB.
10. In order not to occur communication noise, make sure the gap between power
and communication cable at least 5mm.
 Power supply for AHU-KIT should be separate from outdoor unit.
 Do not branch communication cables in order to avoid communication noise.
 Do not connect the terminal block power line from one indoor unit to more than
one AHU-KIT.
 When peeling the power cable, use the appropriate tools to prevent damaging
the wire.
 Communication cable should be installed separately from power cable or other
cables.
Description
Type of cable
Maximum length(m)
Specifications
TR/TR
Thermistor Room
2 x 0.75mm2
accessory, 10 m
12V DC
TEI/TEI
Thermistor In (Liquid pipe)
2 x 0.75mm2
accessory, 10 m
12V DC
TEO/TEO
Thermistor Out (Gas pipe)
2 x 0.75mm2
accessory, 10 m
12V DC
V1/V2
Remote Controller (Optional)
2 x 0.75mm2
-
Remote Controller Power (12V DC)
F3/F4
Communication to Remote Controller
2 x 0.75mm2
-
-
COM/HP/CO
Simple BMS
-
-
-
AV/0V
Simple BMS (Temperature)
2 x 0.75mm2
-
Simple BMS Power
F1/F2
Communication to Outdoor unit
2 x 0.75mm2
-
-
L/N
Power supply
3 x over 1.5mm2
-
1 phase/220~240V/50Hz
1/2
Fan on
2 x 0.75mm2
-
-
3/4
Fan check
2 x 0.75mm2
-
-
34
Tech Spec.
4-8 Connecting Power/Communication cable
DVM Air Handling Unit
1) Ensure that Control-KIT is correctly installed.
• You can choose the built-in type or auxiliary type depending on installation
environment.
• Ensure that the Control-KIT cables are correctly connected.
• Control-KIT should be fireproofed and avoid direct sunlight upon installation.
(Especially for individual type)
• Avoid installing the unit in a location exposed to direct sunlight or rain.
• Do not install the Control-KIT in or on the outdoor unit.
2) Ensure that EEV-KIT is correctly installed.
• Ensure that EEV-KIT can be installed inside or outside, but do not install the
EEV-KIT in residential areas.
• When EEV-KIT is installed separately outside of the AHU, insulate the pipe to
prevent the dew condensate.
• Ensure that IN/OUT pipes are correctly connected.
• Ensure that the body of EEV-KIT is installed in level.
• Make sure that EEV-KIT is installed where condensation can be drained well.
• Do not install the EEV-KIT in or on the outdoor unit.
3) Ensure that IN/OUT sensor is correctly attached.
• IN sensor should be attached after the distributor, on the coldest part of the heat
exchanger piping.
Ensure that the sensor is insulated.
• OUT sensor should be installed approximately 200mm behind the header of
AHU heat exchanger.
35
Tech Spec.
4-9 AHU Kit Installation Check
DVM Air Handling Unit
4-10 Test Operation
1) Before turning the power on, use DC 500V insulation tester to check the power
terminal (L,N) and the earth on AHU-KIT.
◦ Resistance value should be over 30MΩ.
◦ Insulation tester may damage the communication circuit.
◦ Communication terminal should be tested with ordinary circuit tester to check
the short circuit.
Tech Spec.
2) Test the voltage of power(L, N) before turning on the power.
3) Check the list below after installation and make sure the AHU-KIT units are properly
operating.
◦ Installation environment (resistance level etc.)
◦ Refrigerant leak test
◦ Power cable
◦ Insulation on refrigerant pipe.
◦ Drainage
◦ Circuit breaker connection and earth
◦ Normal system operation
36
DVM Air Handling Unit
5. Install Example
1) 00 Golf Course(Good)
Name
00 Golf Course
Location
An-Sung Korea
Usage
Club House in the Golf Course
Utility
Outdoor Unit: DVM PLUS II 120HP
DVM AHU
: 657CMM
Large space & Ceiling height is 8m.
Carbon Filter installed to remove food smell
UVC LAMP installed for air sterilization
Electric-electrode Humidifier installed
Tech Spec.
Distinction
-
AHU
CONTROL PANEL
S-NET mini
EHP
COIL & Humidifier
37
DVM Air Handling Unit
2) Kwangju 00 meeting Hall(Good)
Location
Kwangju 00 meeting Hall
Kwangju Korea
Usage
Large space for education or seminar
Utility
Outdoor Unit : DVM PLUS II 60HP
DVM AHU 1 Set
Fresh Air Duct 1 Set
Distinction
Tech Spec.
Name
-
Large space & Ceiling height is 7m.
Intermittent usage only in specific period.
Electric-electrode Humidifier installed.
Re-modeling site
: Installed duct reused
- Plate-Heat-Exchanger installed for Fresh-Air-Duct
38
DVM Air Handling Unit
3) 00 University Chunan Campus(Good)
Name
Location
00 University Chunan Campus
Chunan Korea
Usage
Cafeteria, Concert Hall
Utility
Outdoor Unit : DVM PLUS III 330HP
DVM AHU 4Sets
DAMPER CO2 Control
Touch Screen Control
Electric Element Steam Humidifier
Re-modeling site
: Installed duct reused
- DMS for DVM and DVM AHU
Tech Spec.
Distinction
-
39
DVM Air Handling Unit
4) Concert Hall in Everland(Good)
Location
Concert Hall in Everland
Yongin Korea
Usage
Large Concert Hall
Utility
Outdoor unit: DVM PLUS III 136HP
DVM AHU 4sets
Distinction
-Noise of airflow is the most important factor(Jet Type)
: Equipped Bunker nozzle for uniform distribution(reach to 30m)
-Controlled by DMS system
Tech Spec.
Name
40
DVM Air Handling Unit
5) Fateh Prakash Palace(Bad)
Name
Fateh Prakash Palace
Udaipur India
Usage
Hotel
Utility
Outdoor unit: DVM PLUS III 32HP
Local AHU + AHU-Kit
Distinction
-
Long pipe installed(224m)
Insufficient refrigerant (62kg  81kg)
Insufficient insulation on pipes.
Installation error caused the cooling capacity problem
Tech Spec.
Location
EVA IN/OUT sensor Installation Error
Insufficient Insulation
41
DVM Air Handling Unit
Tech Spec.
Insufficient Insulation on EEV Kit
Wire installation without Ring-Connector
Improvement
EVA IN
EVA OUT
42
DVM Air Handling Unit
Control Solution
Ⅳ. Control Solution
43
DVM Air Handling Unit
Ⅳ. Control Solution
1. Line-Up
1-1 Control System Line-Up
Model
Product
Picture
Model
Wired
Remote
Control
MWR-WE10
DMS
MIM-D00A
Interface
Module
MIM-B13B
S-Net mini
MST-S3W
Centralized
Controller
MCM-A202B
Scheduler
MWR-BS00
Picture
Control Solution
Product
1-2 Capability Table
AHU Control
Additional
Devices
Control
Additional
Devices
Monitoring
Layout Supply
Wired Remote
Control
O
X
X
X
DMS
O
△(Only DO)
△(Both DI, DO)
X
DMS + DDC
O
O
O
X
S-Net mini
O
X
X
X
Product
1) Additional Devices: Connecting devices which are Sensors(CO2, Humidity), Humidifier
or Damper.
2) Layout: Function that illustrates AHU and other sensors.
3) Be aware, in case of direct DI/DO connection with DMS, there is length limitation.
(Maximum 100m - Depends on the site's condition)
44
DVM Air Handling Unit
2. Basic Control
Drawing can be proceed with local control vender and cooperate with the vender depends
on the chosen devices.
2-1 AHU KIT
AHU
KIT
Control Solution
1) Outdoor unit ↔ AHU KIT Communication wire connection
◦ Connect Outdoor unit's F1, F2 to AHU's F1, F2.
◦ All communication cable spec. is same as system air conditioner's.
(VCTF 2P 0.75㎟/1.5㎟)
◦ The maximum communication cable length is 1,000m.
F1
F2
2) Main PCB Option
3
1
2
11
10
13
4
12
9
5
8
7
6
①Address Setting ②Option Setting ③Status Display
④External Contact ⑤Fan Out, Defrost V/V
Control
⑥Communication ⑦External
/Remocon Power Contact(Option)
⑧CT Sensor,
PT1000 sensor,
FAN F/B
⑨EEV
⑪Down Load
⑬Main Power
⑫Down Load
⑩EVA In/Out Sensor(L)
Duct Receiver(R)
45
DVM Air Handling Unit
3) Miscellaneous PBA Settings
▶ Option S/W
4
5
1
2
3
Control Solution
Fan control(defrost)
1. Main address : Unique address necessary for each AHU Kit
2. RMC address : The same address necessary for any AHU Kit that is connected to the
identical wired controller
3. Function : Refer to Option Switch
4. Sensor connections, one for Eva-In and Room and the other for Eva-Out
5. EEV connection : 2.5HP(MXD-A16K1X025A) / 5HP (MXD-A22K1X050A ) :
Connect EEV to CN62 Only
7.5HP(MXD-A22K2X075A) / 10HP (MXD-A22K2X100A) :
Connect EEV to CN62 /CN60
(Match the color of EEV connector and the socket)
• Try not to touch other parts of the PBA with your hands when setting the
address. Part may get damaged due to static electricity.
46
DVM Air Handling Unit
3) Miscellaneous PBA Settings
▶ how to set Option S/W(K1 ~ K12)
Control Solution
Fan control(defrost)
1. K1 Off : Use external room sensor - (same logic with general indoor unit)
In heating mode, Setting temperature compensation value=0℃, thermo off → fan off
2. K3/K4 : Setting up AHU Capacity. – (See above table)
3. K6 Off : Dry contact signal input. (See page 33 in detail)
Fan signal is on(next page no. 8) but there’s no fan feedback signal. Then happen to E154
4. K7 : Cold draft prevention in heating mode (during thermo on)
ON : Fan signal is On when EVA In/Out sensor is hot.
OFF : Fan signal always On(when thermo on, except defrost mode)
5. K8 : Fan signal output in heating mode (during defrost)
See page 33 in detail
ON : Fan signal stops (turns OFF)
OFF : Fan signal stays output
Power
[AC]
Fan On
[AC]
Fan Check
6. K9 : In heating mode (Same logic with general indoor unit)
off -indoor unit’s EEV step
7. K10 : Master/Slave setting. – (Same logic with general indoor unit)
Priority of indoor unit display on wired remote controller
• Try not to touch other parts of the PBA with your hands when setting the
address. Part may get damaged due to static electricity.
47
DVM Air Handling Unit
4) Miscellaneous PBA Settings
1
2
3
4
5
34
1
6
12
30
27
7
16
15
19
17
31
20
13
18
9 26
Room
Sensor
29
25
Eva IN
Sensor
24 23
11
Eva out Wired Remocon
Sensor
1. SIMPLE BMS
2. AHU FAN CHECK
3. ROOM & EVAP IN SENSOR
4. EVAP OUT SENSOR
5. External contact ON/OFF Signal
6. External contact ERROR / COMP Signal
7. DEFROST [AC]
8. FAN ON [AC]
9. TRANS POWER 220V IN
10.TRANS POWER 5V OUT
11. AHU KIT MAIN POWER [AC]
12. Wired remote control power
13. Outdoor unit communication
14. Wired remote control communication
15. EEV1
16. EEV2
17. S/W DOWNLOAD
33
22
10
32
Simple BMS
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
Comm.
Control Solution
28
8
14
32
21
Power
[AC]
Fan On Fan Check
[AC]
DIP SWITCH
AHU ADDRESS Setting
Wired remote control ADDRESS Setting
REGULATOR (12V)
REGULATOR (5V)
VARISTOR
FILM CAPACITOR
EMI COIL
FILM CAPACITOR
Defrost RELAY
AHU FAN RELAY
FUSE
MICOM
Communication RELAY
CAPACITOR
BUZZER
DISPLAY
48
DVM Air Handling Unit
5) MIM-B14 interface module on AHU Kit
 To control AHU and make synchronous control with other
devices through the external contact input/output signal
Connectors provided
Control Solution
ON/OFF
External input
Short : Indoor unit ON
Open : indoor unit OFF
Contact Output
(Error state)
Close : No Error
Open : Error
Contact Output
(Operation state)
Close : Indoor unit ON
Open : Indoor unit OFF
 Indoor unit option switch K11 – ON : external control enabled, OFF : disabled
 Input load – 5V, 5mA, Output load - 220VAC, 3A
49
DVM Air Handling Unit
6) Controller Address(RMC) Setting
In order to use group controller upper level than central controller, set the group with
Controller Address(RMC). (※Same RMC Addresses include same group.)
1) In case of group control with wired remote controller, connect the same
polarity only the communication wire.
2) Source power of wired remote controller(12V) is supplied only the Master
AHU KIT.
3) Simultaneous control is possible on the group connected AHU by wired
remote controller.
Control Solution
Case Ⅰ.
RMC Address is 0, 4 AHU KITs are set as a group.
With DMS and/or Wired Remote Controller, simultaneous control is possible.
Case Ⅱ.
With Address 0 and 1 AHU KITs are set as 2 groups.
DMS can control each 2 groups; each 2 AHU KITs.
Wired Remote Controller can control all 4 AHU KITs at once.
50
DVM Air Handling Unit
3. Communication Wire Connection
3-1 Wired Remote Controller
 In case of group connection, the lowest level main address will be displayed
on the Wired Remote Controller. In order to display specific AHU's condition,
AHU KIT's option switch K10(Master Indoor unit setting) should be set as off.
51
Control Solution
1) AHU KIT ↔ Wired Remote Controller
◦ Connect AHU KIT's F3, F4 with Wired Remote Controller's F3, F4.
◦ Connect AHU KIT's V1, V2 with Wired Remote Controller's V1, V2.
2) Group Connection
◦ On 1 Wired Remote Controller, maximum 16 AHU KITs can be connected regardless of
capacity.
◦ Wired Remote Controller must be installed in order to share indoor temperature sensor
data.
DVM Air Handling Unit
3-2 DMS
1) Interface Module ↔ DMS
◦ Connect R1, R2 on the Interface Module to 485 port on DMS.(polarity)
◦ The maximum length is 1,000m.
◦ The maximum number of connectable Interface Module is 16.
R2
Control Solution
DMS
R1
R1
R2
2) Interface Module ↔ Centralized Controller ↔ DMS
◦ Connect Interface Module → Centralized Controller → DMS.
◦ Connect R1, R2 on the Interface Module to Centralized Controller's R1, R2, and
Controller's R1, R2 to DMS
DMS
R2
R1
C1
C2
R1
R2
52
DVM Air Handling Unit
3-3 Simple BMS analog interface
Control Solution
Purpose : Temperature setting with simple control rotary switches
• Hysteresis is applied to the end of voltage range in order to stabilize the analog
input.
• The amount of Hysteresis : 0.15V
53
DVM Air Handling Unit
3-4 Analog voltage interface
1) Before installation, make sure the input voltage must be DC power.
AHU-KIT Controller
V1
VCC_CIRCLE
2
1
O
47K-F
47K-F
BMS_Temp.Set
O
AHU-KIT Controller
V2
VCC_CIRCLE
47K-F
47K-F
BMS_Temp.Set
AHU-KIT Controller
X
2
1
O
VCC_CIRCLE
47K-F
1
R2
1k
VCC_CIRCLE
2
DC10V
AHU-KIT Controller
DC0V~DC10V
V1
1
R1
1k
2
DC10V
Control Solution
2) How to set the temperature
-. The maximum allowable input voltage is 10VDC±0.2VDC.
-. In case of the use of a simple variable resistor (or resistor array voltage divider), its
maximum total resistance must be lower than 1㏀ to avoid the electric loading effect.
-. A simple variable resistor (or voltage divider) must be interfaced with only one AHU Kit.
-. A direct voltage output device like a PLC can be interfaced with multiple AHU Kits (No
loading effect).
47K-F
47K-F
47K-F
BMS_Temp.Set
Available
DC10V
Available
AHU-KIT Controller
V1
R1
1k
VCC_CIRCLE
2
47K-F
1
47K-F
BMS_Temp.Set
X
AHU-KIT Controller
X
VCC_CIRCLE
2
47K-F
1
47K-F
Not Available
54
DVM Air Handling Unit
4. Control Connection
4-1 DVM AHU Individual System
Control Panel
F3,F4
Control Solution
F1,F2
R1, R2
S-NET Mini
C1,C2
R1,R2
DVM AHU ON/OFF
Cool/Heat Change
Wired Remote Controller
Indoor Temp. Setting
Schedule Control
Failure Data management
Operation History Back Up
User level restriction
S-NET Mini
55
DVM Air Handling Unit
4-2 System Air Conditioner + DVM AHU + Building Automation
BAS Control
System Air Conditioner + DVM AHU
PC Control
PIM
DMS
S-NET mini
Control Solution
Gateway
Centralize
Gateway
W/hr meter
I/M
DVM AHU Control
Building Automation
DDC
Power supply
DDC
Utilities
56
DVM Air Handling Unit
4-3 BAS Interlock
1) DDC + MMI
DDC
(Automation Vender)
DMS
BACnet
Control Solution
Master Controller
I/M
MMI
2) DDC + DMS
DDC
(Automation Vender)
I/M
DMS
※ DDC, MIMI should be provided by local controller companies.
57
DVM Air Handling Unit
3) Local Automation Vender
DDC
(Automation Vender)
Control Solution
I/M
Protocol open
DMS
Automation Vender
I/M
Automation Vender
58
DVM Air Handling Unit
Attention
Ⅴ. Trouble Shooting
59
DVM Air Handling Unit
Ⅴ. Trouble Shooting
1. AHU-KIT temperature sensor OPEN/SHORT error
Is the temperature sensor connector
properly connected to PBA socket?
NO
Connect the temperature
sensor connector to the PBA
socket and restart the system
YES
Attention
Check the resistance value of
temperature sensor connector and
the PBA after disconnecting them
Is the resistance value larger than the
number shown in the table on the right?
NO
Change the
temperature sensor
YES
Temperature sensor
Change the Control-KIT PBA
60
DVM Air Handling Unit
2. Fan Error
Connect the temperature sensor
connector to the PBA socket and
restart the system
NO
NO
Do you need fan feedback?
Attention
Did you set up the system
to receive the fan feedback?
Connect feedback signal to fan
check terminal on Control-KIT.
Ensure that DIP switch K12, on
Control-KIT, is OFF.
YES
NO
Is fan working?
Check the AHU fan control
YES
When the AHU fan is operating,
does fan feedback cable
offer SHORT signal?
NO
Re-arrange the Control-KIT circuit
again to output the appropriate fan
feedback signal depending on the
fan operation status
YES
Change the Control-KIT PBA
61
DVM Air Handling Unit
3. Error between AHU-KIT and outdoor unit at the
beginning of operation
Check the number of AHU-KIT set up on
outdoor unit PBA is equal to actual number of
AHU-KIT installed
Do numbers match?
NO
Set the correct number of AHU-KIT on outdoor unit
PBA and press the reset key(k3) to restart the
tracking
YES
Is there no response on the display intracking?
Attention
Press the reset key(K3) on the outdoor unit PBA
and check the responding numbers of AHU-KIT
on the display.
NO
YES
Disconnect the two communication cable from
outdoor unit to AHU-KIT and check the both
cables with oscilloscope
Wait for 2 minutes and find the AHU-KIT with the
communication error. Check if the address on PBA
is same with any others.
- Communication error occurs when the address is
assigned to more than one AHU-KIT. In this case, all
the AHU-KIT sharing one address will show error
message.
If the address is correct, check the communication
cable and change the AHU-KIT PBA
NO
Check the communication cable and the connector
on outdoor unit and change the PBA
YES
Are the voltage between the cables
verified as square wave over DC±0.7?
YES
-Check the communication cables between the
AHU-KIT and outdoor/indoor units.
-When there is no error, connect just one AHU-KIT
to check them individually.
-When the error still occurs, change the AHU-KIT
PBA
62
DVM Air Handling Unit
4. Error between AHU-KIT and outdoor unit during
operation(after tracking)
Press the reset KEY(K3) on the outdoor unit
PBA and check the display
Is there any response on the display
from the AHU-KIT when tracking?
NO
Attention
YES
Wait for 2 minutes and find the AHU-KIT with the
communication error. Check if the address on PBA
is same with any others.
- Communication error occurs when the address is
assigned to more than one AHU-KIT. In this case, all
the AHU-KIT sharing one address will show error
message.
Disconnect two communication cables from
outdoor unit to AHU-KIT and check the both
cables with oscilloscope
If the address is correct, check the communication
cable and change the AHU-KIT PBA
YES
Are the voltage between the cables
verified as square wave over DC±0.7?
(as shown in thebelow graph)
NO
Check the communication cable and the connector
on outdoor unit and change the PBA
YES
-Check the communication cables between the
AHU-KIT and outdoor/indoor units.
-When there is no error, connect just one AHU-KIT
to check them individually.
-When the error still occurs, change the AHU-KIT
PBA
63
DVM Air Handling Unit
5. How to inspect just in case the below condition is satisfied
Is EVA IN sensor in appropriate
location?
NO
Attach the IN sensor between the distributor
and the heat exchanger.
Check the attachment of the sensor.
Is EVA OUT sensor in appropriate
location?
NO
Attach the OUT sensor behind the heat exchanger
Header.
Check the attachment of the sensor.
YES
Is EEV coil connected to PBA?
NO
7.5/10 HP unit has 2 EEVs connected to 2 different
sockets in PBA.
2.5/5 HP unit has single EEV connected to single
socket in PBA.
YES
Is EEV coil correctly installed?
NO
Ensure that EEV coil is correctly installed in body of
EEV. It may operate in opposite direction when
installed in reversed position.
YES
Did you add adequate amount of
additional refrigerant?
NO
Add adequate amount of refrigerant.
(Refer to Outdoor Technical Data Book)
YES
Change the Control-KIT PBA.
64
Attention
YES
DVM Air Handling Unit
Attention
Ⅵ. Notice
65
DVM Air Handling Unit
Ⅵ. Notice
1. Sensor Installation
1-1 Install Position
Check the proper attaching position of sensor.
After
Before
Eva In Sensor
Move to Eva In
Attention
Eva In Sensor
: Installed on Before EEV
1-2 Wrong Connection of Sensor
Check proper installation of Pipe, Sensor and EEV
Pipe
Sensor and EEV Wire
Pipe
Sensor and EEV wires are cross connected
Sensor and EEV Wire
66
DVM Air Handling Unit
2. Communication Wire Installation
2-1 Wrong Connection of Communication Wire
Check proper installation of Communication Wire
Comm.
Pipe
Attention
Comm.
Pipe
67
DVM Air Handling Unit
3. Caution about Installation
3-1 Caution
1. Before installation, service, and cleaning, all power must be turned off.
2. Installation is allowable only to the installer or dealer.
◦ Leakage, electric shock or fire can be occurred by non-specialist's installation.
3. Installation process has to be follow this manual.
◦ Leakage, electric shock or fire can be occurred by improper installation.
4. AHU KIT manufacturer do not responsible for accidents occurred by improper
installation or non-specialist's installation.
5. Install only with provided devices, allowed specified devices and allowed tools.
◦ The usage of unspecified tools can be cause of Fall, Leakage, electric shock or
fire.
6. Must use R410A.
◦ Usage of other refrigerant can cause explosion.
7. Do not use pipe for R22 or flare type devices.
8. Must ventilate in case of refrigerant leakage.
◦ When refrigerant contact with flame, it can generate toxic gas.
9. When power cable is damaged, only qualified specialist can manage it.
10. Electric installation is allowed only to certified installer and the installation should
be proceed in accordance with this manual.
◦ Using unspecified electric devices causes voltage-drop, insufficient-voltage,
electric shock or fire.
11. Arrange wire in order not to open the cover and structure and fasten the cover of
the electric part.
◦ Insufficient installation of the electric part's cover can be the cause of electric
shock or fire.
12. When supply the main power installation of Earth Leakage Breaker(ELB) is necessary.
◦ Installation without ELB causes electric shock or fire, because it cannot protect
over-current and leakage current.
13. Wire should be connected by specific cable and firmly fasten in order not to apply
stress on the terminal block.
◦ Incomplete fix of wire causes electric shock or fire.
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Attention
Obey following Warning for the safety of installer and user
DVM Air Handling Unit
14. Be aware not to supply power lower than minimum voltage or higher than
maximum voltage.
◦ It can be the cause of the damage of electronic devices or decline of
performance.
15. All electric wires must be used certified products.
16. After the installation, check the leakage of refrigerant.
◦ When refrigerant contact with flame, it can generate toxic gas.
Attention
Use only R410A refrigerant.
◦ Inflow of impurities(moisture, dust) causes serious defect in performance and
reliability.
◦ Be sure of liquefied charge in case of additional refrigerant charge. When the
component of refrigerant mixtures is changed, there will be performance and
reliability problems.
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DVM Air Handling Unit
3-2 Warning
1. Make sure of a earth
2. Do not connect the earth wire to the gas pipe, water pipe, lighting rod or telephone wire.
◦ If earth is incomplete, electric shock or fire may occur.
3. Follow the instructions in this manual to make sure that the condensed water dripping
from the drain hose runs out properly and insulate the drain pipe so that dew
condensate does not generate.
◦ Household goods may get wet if the drain pipe is not properly installed.
4. Install the power cable and communication cable of the AHU-KIT at least 1m away from
electric appliances.
◦ Noise may heard depending on the electric wave though the cables are installed away
from electric appliances.
◦ Keep the space in front of AHU-KIT for maintenance.
5. Do not install the air conditioner in following places.
◦ The place where there is mineral oil or arsenic acid.
- There is a chance that parts may get damaged due to burned resin.
◦ The place where corrosive gas such as sulfurous acid gas generates from the vent
pipe or air outlet.
- The copper pipe or connection pipe may corrode and refrigerant may leak.
◦ The place where there is a machine that generates electromagnetic waves.
- The air conditioner may not operate normally due to control system.
◦ The place where there is a danger of existing combustible gas, thinner or gasoline is
handled.
- The place where carbon fiber or flammable dust is.
◦ The place where like spa and shore.
◦ The place with direct contact of outdoor humidity, dust and temperature.
※ The manufacturer is not responsible for the damage occurred by not keeping standard of
the installation.
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Attention
Obey following Warning for the safety of installer and user
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