Airwell HND DCI Series User manual

HND DCI Series
Indoor Units
Outdoor Units
AWSI-HND009-N11
7SP023034
AWAU-YND009-H11
7SP062878
AWSI-HND012-N11
7SP023035
AWAU-YND012-H11
7SP062879
AWSI-HND018-N11
7SP023036
AWAU-YND018-H11
7SP062880
AWSI-HND024-N11
7SP023037
AWAU-YND024-H11
7SP062881
REFRIGERANT
R410A
HEATPUMP
REFRIGERANT
SM HND DCI 1 GB
April - 2016

CONTENTS
1. Precaution................................................................................................................................................. 3
2. Function.................................................................................................................................................... 6
3. Product Specification.............................................................................................................................. 7
4. Dimension................................................................................................................................................11
5. Performance data................................................................................................................................... 17
6. Refrigerant Cycle Diagram.................................................................................................................... 25
7. Wiring diagram....................................................................................................................................... 26
8. Installation Details.................................................................................................................................. 30
9. Operation Characteristics..................................................................................................................... 37
10. Electronic function ................................................................................................................................ 38
11. Troubleshooting..................................................................................................................................... 46
12. Exploded view and spare part list........................................................................................................ 64

PRECAUTION
HND DCI 3 Version - 1
1. Precaution
1.1 Safety Precaution
To prevent injury to the user or other
people and property damage, the following
instructions must be followed.
Incorrect operation due to ignoring
instruction will cause harm or damage.
Before service the unit, be sure to
read this service manual at first.
1.2 Warning
Installation
Do not use a defective or underrated
circuit breaker. Use this appliance on a
dedicated circuit.
There is risk of fire or electric shock.
For electrical work, contact the dealer,
seller, a qualified electrician, or an
authorized service center.
Do not disassemble or repair the product,
there is risk of fire or electric shock.
Always ground the product.
There is risk of fire or electric shock.
Install the panel and the cover of
control box securely.
There is risk of fire of electric shock.
Always install a dedicated circuit and
breaker.
Improper wiring or installation may cause fore
or electric shock.
Use the correctly rated breaker of
fuse.
There is risk of fire or electric shock.
Do not modify or extend the power
cable.
There is risk of fire or electric shock.
Do not install, remove, or reinstall the
unit by yourself (customer).
There is risk of fire, electric shock, explosion,
or injury.
Be caution when unpacking and
installing the product.
Sharp edges could cause injury, be especially
careful of the case edges and the fins on the
condenser and evaporator.
For installation, always contact the
dealer or an authorized service center.
Do not install the product on a
defective installation stand.
Be sure the installation area does not
deteriorate with age.
If the base collapses, the air conditioner could
fall with it, causing property damage, product
failure, and personal injury.
Do not let the air conditioner run for a
long time when the humidity is very high
and a door or a window is left open.
Take care to ensure that power cable
could not be pulled out or damaged during
operation.
There is risk of fire or electric shock.
Do not place anything on the power
cable.
There is risk of fire or electric shock.
Do not plug or unplug the power
supply plug during operation.
There is risk of fire or electric shock.
Do not touch (operation) the product
with wet hands.
Do not place a heater or other
appliance near the power cable.
There is risk of fire and electric shock.
Do not allow water to run into
electrical parts.
It may cause fire, failure of the product, or
electric shock.
Do not store or use flammable gas or
combustible near the product.
There is risk of fire or failure of product.
Do not use the product in a tightly
closed space for a long time.
Oxygen deficiency could occur.
When flammable gas leaks, turn off
the gas and open a window for ventilation
before turn the product on.
If strange sounds or smoke comes
from product, turn the breaker off or
disconnect the power supply cable.

PRECAUTION
Version - 1 4 HND DCI
There is risk of electric shock or fire.
Stop operation and close the window
in storm or hurricane. If possible, remove
the product from the window before the
hurricane arrives.
There is risk of property damage, failure of
product, or electric shock.
Do not open the inlet grill of the
product during operation. (Do not touch the
electrostatic filter, if the unit is so equipped.)
There is risk of physical injury, electric shock,
or product failure.
When the product is soaked, contact
an authorized service center.
There is risk of fire or electric shock.
Be caution that water could not enter
the product.
There is risk of fire, electric shock, or product
damage.
Ventilate the product from time to
time when operating it together with a stove
etc.
There is risk of fire or electric shock.
Turn the main power off when
cleaning or maintaining the product.
There is risk of electric shock.
When the product is not be used for a
long time, disconnect the power supply plug
or turn off the breaker.
There is risk of product damage or failure, or
unintended operation.
Take care to ensure that nobody
could step on or fall onto the outdoor unit.
This could result in personal injury and
product damage.
CAUTION
Always check for gas (refrigerant)
leakage after installation or repair of
product.
Low refrigerant levels may cause failure of
product.
Install the drain hose to ensure that
water is drained away properly.
A bad connection may cause water leakage.
Keep level even when installing the
product.
It can avoid vibration of water leakage.
Do not install the product where the
noise or hot air from the outdoor unit could
damage the neighborhoods.
It may cause a problem for your neighbors.
Use two or more people to lift and
transport the product.
Do not install the product where it will
be exposed to sea wind (salt spray) directly.
It may cause corrosion on the product.
Corrosion, particularly on the condenser and
evaporator fins, could cause product
malfunction or inefficient operation.
Operational
Do not expose the skin directly to
cool air for long time. (Do not sit in the
draft).
Do not use the product for special
purposes, such as preserving foods, works
of art etc. It is a consumer air conditioner,
not a precision refrigerant system.
There is risk of damage or loss of property.
Do not block the inlet or outlet of air
flow.
Use a soft cloth to clean. Do not use
harsh detergents, solvents, etc.
There is risk of fire, electric shock, or damage
to the plastic parts of the product.
Do not touch the metal parts of the
product when removing the air filter. They
are very sharp.
Do not step on or put anything on the
product. (outdoor units)
Always insert the filter securely.
Clean the filter every two weeks or more
often if necessary.
A dirty filter reduces the efficiency of the air
conditioner and could cause product
malfunction or damage.
Do not insert hands or other objects
through air inlet or outlet while the product
is operated.

PRECAUTION
HND DCI 5 Version - 1
Do not drink the water drained from
the product.
Use a firm stool or ladder when
cleaning or maintaining the product.
Be careful and avoid personal injury.
Replace the all batteries in the remote
control with new ones of the same type. Do
not mix old and new batteries or different
types of batteries.
There is risk of fire or explosion.
Do not recharge or disassemble the
batteries. Do not dispose of batteries in a
fire.
They may burn of explode.
If the liquid from the batteries gets
onto your skin or clothes, wash it well with
clean water. Do not use the remote of the
batteries have leaked.

FUNCTIONS
Version - 1 6 HND DCI
2. Function
Model Names of Indoor/Outdoor Units
3 D
Inverter
Capacity
Indoor units
Outdoor units
9K
AWSI-HND009-N11
AWAU-YND009-H11
12k
AWSI-HND012-N11
AWAU-YND012-H11
18k
AWSI-HND018-N11
AWAU-YND018-H11
24k
AWSI-HND024-N11
AWAU-YND024-H11
Main Features
The unit benefits from the most advanced technological innovations, namely:
DC inverter technology.
R410A models
1W standby
Microprocessor control and indoor LED display
High SEER/SCOP , A++/A+ level with Average climate.
Cooling operation at outdoor temperature wide range -15 ~ 50ºC.
Heating operation at outdoor temperature down to -15ºC.
Easy installation and service.
Sleep mode from remote control to save energy
ON/OFF timer and clock display
Vertical and horizontal swing louver
Intelligent Deicing
Memory from power failure
Rapid cooling/heating
I-Feel function
Cold air prevention in heating
Clean function
Self diagnosic (Error indications) for ease of maintenance
Plasma

PRODUCT SPECIFICATION
HND DCI 7 Version - 1
3. Product Specification
3.1 AWSI-HND009-N11 / AWAU-YND009-H11
MODEL INDOOR UNIT
AWSI-HND009-N11
Model Outdoor Unit
AWAU-YND009-H11
Installation Method of Pipe
Flared
Characteristics
Units
Cooling
Heating
Average
Warm
Cold
Capacity (1)
kW
2.65(1.2-3.3)
2.8(0.85-3.7)
Pdesign
kW
2.65
2.4
2.8
2.8
SEER /SCOP (2)
W/W
7.3
4
5.5
3.5
Energy efficiency class
A++
A+
A+++
A
Annual energy consumption
kWh
127
910
713
1680
Tbiv
oC
N/A
-7
2
-15
Tol
oC
N/A
-15
Power supply
V/Ph/Hz
220-240V/Single/50Hz
Circuit breaker rating
A
10
INDOOR
Fan type & quantity
Cross flow fan x1
Fan speeds
H/M/L/VL
RPM
1000/900/680
Air flow (3)
H/M/L/VL
m3/hr
460/400/280
External static pressure
Min-Max
Pa
0
Sound power level (4)
H/M/L
dB(A)
53
Sound pressure level(5)
H/M/L/VL
dB(A)
35/31/25/21
Moisture removal
l/hr
1
Condensate drain tube I.D
mm
16
Dimensions
WxHxD
mm
750x198x280
Weight
kg
7.8
Package dimensions
LxWxH
mm
830x270x355
Packaged weight
kg
9.9
Stacking height
units
8
OUTDOOR
Refrigerant control
EEV
Compressor type, model
Rotary DC Inverter
Fan type & quantity
Axial x 1
Fan speeds
H/L
RPM
810/710/520
Air flow
H/L
m3/hr
1900
Sound power level(4)
H/L
dB(A)
60
Sound pressure level(5)
H/L
dB(A)
50
Dimensions
WxHxD
mm
770x300x555
Weight
kg
26.6
Package dimensions
LxWxH
mm
900x345x585
Packaged weight
kg
29
Stacking height
Units
4
Refrigerant type
R410A
Refrigerant charge (standard connecting tubing length)
kg(5m)
0.8
Additional charge per 1 meter
gr / 1m
15
Connections between units
Liquid line
In.(mm)
1/4’’
Suction line
In.(mm)
3/8’’
Max.tubing length
m.
25
Max.height difference
m.
10
Operation control type
Remote control
Heating elements
kW
NA
Others
(1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units).
(2) SEER / SCOP calculation accordance with EN14825.

PRODUCT SPECIFICATION
Version - 1 8 HND DCI
3.2 AWSI-HND012-N11 / AWAU-YND012-H11
Model Indoor Unit
AWSI-HND012-N11
Model Outdoor Unit
AWAU-YND012-H11
Installation Method of Pipe
Flared
Characteristics
Units
Cooling
Heating
Average
Warm
Cold
Capacity (1)
kW
3.54(1.3-4.4)
3.7(1.2-4.8)
Pdesign
kW
3.54
2.8
3.2
3.5
SEER /SCOP (2)
W/W
6.8
4.4
5.5
3.5
Energy efficiency class
A++
A+
A+++
A
Annual energy consumption
kWh
170
891
815
2100
Tbiv
oC
N/A
-7
2
-15
Tol
oC
N/A
-15
Power supply
V/Ph/Hz
220-240V/Single/50Hz
Circuit breaker rating
A
10
INDOOR
Fan type & quantity
Cross flow fan x1
Fan speeds
H/M/L/VL
RPM
1000/850/700
Air flow (3)
H/M/L/VL
m3/hr
550/460/320
External static pressure
Min-Max
Pa
0
Sound power level (4)
H/M/L
dB(A)
53
Sound pressure level(5)
H/M/L/VL
dB(A)
36/32/26/21
Moisture removal
l/hr
1.2
Condensate drain tube I.D
mm
16
Dimensions
WxHxD
mm
835x198x280
Weight
kg
8.7
Package dimensions
LxWxH
mm
910x270x355
Packaged weight
kg
11.2
Stacking height
units
8
OUTDOOR
Refrigerant control
EEV
Compressor type, model
Rotary DC Inverter
Fan type & quantity
Axial x 1
Fan speeds
H/L
RPM
810/710/520
Air flow
H/L
m3/hr
2000
Sound power level(4)
H/L
dB(A)
60
Sound pressure level(5)
H/L
dB(A)
50
Dimensions
WxHxD
mm
800x333x554
Weight
kg
29.1
Package dimensions
LxWxH
mm
920x390x615
Packaged weight
kg
31.9
Stacking height
Units
4
Refrigerant type
R410A
Refrigerant charge (standard connecting tubing length)
kg(5m)
0.95
Additional charge per 1 meter
gr / 1m
15
Connections between units
Liquid line
In.(mm)
1/4’’
Suction line
In.(mm)
3/8’’
Max.tubing length
m.
25
Max.height difference
m.
10
Operation control type
Remote control
Heating elements
kW
NA
Others
(1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units).
(2) SEER / SCOP calculation accordance with EN14825.

PRODUCT SPECIFICATION
HND DCI 9 Version - 1
3.3 AWSI-HND018-N11 / AWAU-YND018-H11
Model Indoor Unit
AWSI-HND018-N11
Model Outdoor Unit
AWAU-YND018-H11
Installation Method of Pipe
Flared
Characteristics
Units
Cooling
Heating
Average
Warm
Cold
Capacity (1)
kW
5.3(1.8-6.1)
5.5(1.4-6.7)
Pdesign
kW
5.3
4.4
4.6
5.3
SEER /SCOP (2)
W/W
6.5
4.2
5.1
3.3
Energy efficiency class
A++
A+
A+++
B
Annual energy consumption
kWh
285
1467
1263
3373
Tbiv
oC
N/A
-7
2
-15
Tol
oC
N/A
-15
Power supply
V/Ph/Hz
220-240V/Single/50Hz
Circuit breaker rating
A
16
INDOOR
Fan type & quantity
Cross flow fan x1
Fan speeds
H/M/L/VL
RPM
1000/800/680
Air flow (3)
H/M/L/VL
m3/hr
830/620/490
External static pressure
Min-Max
Pa
0
Sound power level (4)
H/M/L
dB(A)
62
Sound pressure level(5)
H/M/L/VL
dB(A)
42/36/30/23
Moisture removal
l/hr
1.7
Condensate drain tube I.D
mm
16
Dimensions
WxHxD
mm
990x218x315
Weight
kg
11.8
Package dimensions
LxWxH
mm
1065x400x300
Packaged weight
kg
15
Stacking height
units
7
OUTDOOR
Refrigerant control
EEV
Compressor type, model
Rotary DC Inverter
Fan type & quantity
Axial x 1
Fan speeds
H/L
RPM
810/700/550
Air flow
H/L
m3/hr
2100
Sound power level(4)
H/L
dB(A)
63
Sound pressure level(5)
H/L
dB(A)
53
Dimensions
WxHxD
mm
800x333x554
Weight
kg
37.8
Package dimensions
LxWxH
mm
920x390x615
Packaged weight
kg
40.5
Stacking height
Units
4
Refrigerant type
R410A
Refrigerant charge (standard connecting tubing length)
kg(5m)
1.48
Additional charge per 1 meter
gr / 1m
15
Connections between units
Liquid line
In.(mm)
1/4’’
Suction line
In.(mm)
1/2’’
Max.tubing length
m.
30
Max.height difference
m.
20
Operation control type
Remote control
Heating elements
kW
NA
Others
(1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units).
(2) SEER / SCOP calculation accordance with EN14825.

PRODUCT SPECIFICATION
Version - 1 10 HND DCI
3.4 AWSI-HND012-N11 / AWAU-YND012-H11
Model Indoor Unit
AWSI-HND024-N11
Model Outdoor Unit
AWAU-YND024-H11
Installation Method of Pipe
Flared
Characteristics
Units
Cooling
Heating
Average
Warm
Cold
Capacity (1)
kW
7.05(2.7-7.8)
7.3(1.6-8.7)
Pdesign
kW
7.05
5.7
7.1
8.0
SEER /SCOP (2)
W/W
7.0
4
5.1
3.3
Energy efficiency class
A++
A+
A+++
B
Annual energy consumption
kWh
353
1995
1949
5091
Tbiv
oC
N/A
-7
2
-15
Tol
oC
N/A
-15
Power supply
V/Ph/Hz
220-240V/Single/50Hz
Circuit breaker rating
A
25
INDOOR
Fan type & quantity
Cross flow fan x1
Fan speeds
H/M/L/VL
RPM
1000/900/700
Air flow (3)
H/M/L/VL
m3/hr
1050/950/700
External static pressure
Min-Max
Pa
0
Sound power level (4)
H/M/L
dB(A)
64
Sound pressure level(5)
H/M/L/VL
dB(A)
46/41/34/28
Moisture removal
l/hr
2.4
Condensate drain tube I.D
mm
16
Dimensions
WxHxD
mm
1186x258x343
Weight
kg
15.6
Package dimensions
LxWxH
mm
1265x340x420
Packaged weight
kg
20.6
Stacking height
units
7
OUTDOOR
Refrigerant control
EEV
Compressor type, model
Rotary DC Inverter
Fan type & quantity
Axial x 1
Fan speeds
H/L
RPM
810/750/600
Air flow
H/L
m3/hr
2700
Sound power level(4)
H/L
dB(A)
69
Sound pressure level(5)
H/L
dB(A)
59
Dimensions
WxHxD
mm
845x363x702
Weight
kg
48.4
Package dimensions
LxWxH
mm
965x395x755
Packaged weight
kg
51.6
Stacking height
Units
3
Refrigerant type
R410A
Refrigerant charge (standard connecting tubing length)
kg(5m)
2
Additional charge per 1 meter
gr / 1m
30
Connections between units
Liquid line
In.(mm)
3/8"
Suction line
In.(mm)
5/8"
Max.tubing length
m.
50
Max.height difference
m.
25
Operation control type
Remote control
Heating elements
kW
NA
Others
(1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units).
(2) SEER / SCOP calculation accordance with EN14825.

DIMENSION
HND DCI 11 Version - 1
4. Dimension
4.1 Indoor Unit
W D
Model
W
D
H
AWSI-HND009-N11
750
198
280
AWSI-HND012-N11
835
198
280
AWSI-HND018-N11
990
218
315
AWSI-HND024-N11
1186
258
343

DIMENSIONS
Version - 1 12 HND DCI
For AWSI-HND009-N11
For AWSI-HND012-N11

DIMENSION
HND DCI 13 Version - 1
For AWSI-HND018-N11
For AWSI-HND024-N11

DIMENSIONS
Version - 1 14 HND DCI
4.2 Outdoor Unit
More than 30cm
More than 60cm
More than 200cm
More than 30cm
More than 60cm
(Service space)
Fence or
obstacles
For AWAU-YND009-H11
487 W1
70 W2
298
555
300 D
H
12
60
93
H1
H2
D1
770 W
779 W3
322
D2
25 B1
90 B2
61.5 A2
12 A1
R6
286
D3

DIMENSION
HND DCI 15 Version - 1
For AWAU-YND012-H11, AWAU-YND018-H11
800 W
514 W1
554
60
85.5
340
12.0
311
815 W3
365
333 D
70 W2
H
H1
H2
D1
D2 D3
62 B1
106 B2
20 A1
R20
R6
61.6 A2

DIMENSIONS
Version - 1 16 HND DCI
For AWAU-YND024-H11

PERFORMANCEDATA
HND DCI 17 Version - 1
5. Performance data
5.1 AWSI-HND009-N11 / AWAU-YND009-H11
1) Cooling
ID COIL ENTERING AIR DB/WB TEMPERATURE [C0]
OD COIL ENTERING
AIR DB
TEMPERATURE [C0]
DATA
22/15
24/17
27/19
29/21
32/23
-10 -20
(protection range)
TC
80 - 110 % of nominal
SC
80 - 105 % of nominal
PI
25 - 50 % of nominal
25
TC
2.55
2.72
2.89
3.05
3.22
SC
2.13
2.18
2.22
2.26
2.31
PI
0.52
0.53
0.54
0.55
0.56
30
TC
2.43
2.60
2.76
2.93
3.10
SC
2.08
2.12
2.17
2.21
2.25
PI
0.58
0.59
0.60
0.61
0.62
35
TC
2.31
2.47
2.70
2.81
2.97
SC
2.02
2.07
2.11
2.16
2.20
PI
0.64
0.65
0.69
0.67
0.68
40
TC
2.18
2.35
2.52
2.68
2.85
SC
1.97
2.01
2.06
2.10
2.15
PI
0.70
0.71
0.72
0.73
0.74
46
TC
2.04
2.20
2.37
2.54
2.70
SC
1.91
1.95
1.99
2.04
2.08
PI
0.77
0.78
0.79
0.80
0.81
Legend:
TC -Total Cooling Capacity [kW] SC - Sensible Capacity [kW]
PI - Power Input [kW] WB - Wet Bulb Temperature
DB - Dry Bulb Temperature ID - Indoor
OD - Outdoor

PERFORAMCNE DATA
Version - 1 18 HND DCI
2) Heating
ID COIL ENTERING AIR DB TEMPERATURE [C0]
OD COIL ENTERING
AIR DB/WB
TEMPERATURE [C0]
DATA
15
20
25
-15/-16
TC
1.78
1.66
1.53
PI
0.42
0.46
0.51
-10/-12
TC
1.98
1.86
1.73
PI
0.51
0.55
0.59
-7/-8
TC
2.14
2.01
1.89
PI
0.57
0.61
0.66
-1/-2
TC
2.21
2.09
1.96
PI
0.60
0.65
0.69
2/1
TC
2.26
2.14
2.01
PI
0.62
0.67
0.71
7/6
TC
2.92
2.80
2.68
PI
0.66
0.70
0.74
10/9
TC
3.09
2.96
2.84
PI
0.70
0.74
0.78
15/12
TC
3.25
3.12
3.00
PI
0.74
0.78
0.82
15-24
TC
85 - 105 % of nominal
(Protection Range)
PI
80 - 120 % of nominal
Legend
TC -Total Capacity [kW] PI - Power Input [kW]
WB -Wet Bulb Temperature DB -Dry Bulb Temperature
ID - Indoor OD –Outdoor

PERFORMANCEDATA
HND DCI 19 Version - 1
5.2 AWSI-HND012-N11 / AWAU-YND012-H11
1) Cooling
ID COIL ENTERING AIR DB/WB TEMPERATURE [C0]
OD COIL ENTERING
AIR DB
TEMPERATURE [C0]
DATA
22/15
24/17
27/19
29/21
32/23
-10 - 20
(protection range)
TC
80 - 110 % of nominal
SC
80 - 105 % of nominal
PI
25 - 50 % of nominal
25
TC
3.42
3.65
3.87
4.09
4.32
SC
2.72
2.77
2.83
2.88
2.94
PI
0.86
0.88
0.89
0.91
0.93
30
TC
3.26
3.48
3.70
3.93
4.15
SC
2.65
2.70
2.76
2.81
2.87
PI
0.96
0.98
0.99
1.01
1.03
35
TC
3.09
3.32
3.54
3.76
3.99
SC
2.58
2.63
2.69
2.75
2.80
PI
1.06
1.08
1.10
1.11
1.13
40
TC
2.93
3.15
3.38
3.60
3.82
SC
2.51
2.57
2.62
2.68
2.73
PI
1.16
1.18
1.20
1.21
1.23
46
TC
2.73
2.95
3.18
3.40
3.63
SC
2.43
2.48
2.54
2.59
2.65
PI
1.28
1.30
1.32
1.33
1.35
Legend:
TC -Total Cooling Capacity [kW] SC - Sensible Capacity [kW]
PI - Power Input [kW] WB - Wet Bulb Temperature
DB - Dry Bulb Temperature ID - Indoor
OD - Outdoor

PERFORAMCNE DATA
Version - 1 20 HND DCI
2) Heating
ID COIL ENTERING AIR DB TEMPERATURE [C0]
OD COIL ENTERING
AIR DB/WB
TEMPERATURE [C0]
DATA
15
20
25
-15/-16
TC
2.36
2.19
2.03
PI
0.53
0.58
0.64
-10/-12
TC
2.62
2.46
2.29
PI
0.64
0.69
0.74
-7/-8
TC
2.82
2.66
2.49
PI
0.72
0.77
0.83
-1/-2
TC
2.92
2.76
2.59
PI
0.76
0.81
0.87
2/1
TC
2.99
2.82
2.66
PI
0.79
0.84
0.89
7/6
TC
3.86
3.70
3.54
PI
0.83
0.88
0.93
10/9
TC
4.08
3.91
3.75
PI
0.88
0.93
0.98
15/12
TC
4.29
4.13
3.96
PI
0.93
0.98
1.03
15-24
TC
85 - 105 % of nominal
(Protection Range)
PI
80 - 120 % of nominal
Legend
TC -Total Capacity [kW] PI - Power Input [kW]
WB -Wet Bulb Temperature DB -Dry Bulb Temperature
ID - Indoor OD –Outdoor