Electra WNG 25 DCI Series User manual

Service Manual
WNG/LEX DCI Inverter Series
REFRIGERANT
R410A
HEAT PUMP
MARCH – 2006
Indoor Units Outdoor Units
WNG 25 DCI ONG 25 DCI
WNG 35 DCI ONG 35 DCI
LEX 25 DCI ONG 25 DCI
LEX 35 DCI ONG 35 DCI

A
LIST OF EFFECTIVE PAGES
Revision Y06-01 Service Manual - WNG/LEX DCI
LIST OF EFFECTIVE PAGES
Note: Changes in the pages are indicated by a “Revision#” in the footer of each effected page
(when none indicates no changes in the relevant page). All pages in the following list represent
effected/ non effected pages divided by chapters.
Dates of issue for original and changed pages are:
Original ....... 0 ........ March 2006
Total number of pages in this publication is 76 consisting of the following:
Page
No.
Revision
No. #
Page
No.
Revision
No. #
Page
No.
Revision
No. #
Title....................... 0
A ........................... 0
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1-1 - 1-4................ 0
2-1 - 2-3................ 0
3-1 ........................ 0
4-1 - 4-3................ 0
5-1 - 5-13.............. 0
6-1 - 6-4................ 0
7-1 ........................ 0
8-1-8-2.................. 0
9-1-9-2.................. 0
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11-1-11-19............. 0
12-1-12-6.............. 0
13-1-13-6.............. 0
14-1-14-6.............. 0
15-1-15-10............ 0
Appendix -A...........0
• Zero in this column indicates an original page.
*Due to constant improvements please note that the data on this service manual can be modified
with out notice.
**Photos are not contractual

i
TABLE OF CONTENTS
Revision Y06-01
Service Manual - WNG/LEX DCI
Table of Contents
1. INTRODUCTION ...................................................................................................1-1
2. PRODUCT DATA SHEET .....................................................................................2-1
3. RATING CONDITIONS..........................................................................................3-1
4. OUTLINE DIMENSIONS .......................................................................................4-1
5. PERFORMANCE DATA ........................................................................................5-1
6. PRESSURE CURVES ...........................................................................................6-1
7. ELECTRICAL DATA..............................................................................................7-1
8. WIRING DIAGRAMS .............................................................................................8-1
9. REFRIGERATION DIAGRAMS.............................................................................9-1
10. TUBING CONNECTIONS......................................................................................10-1
11. CONTROL SYSTEM .............................................................................................11-1
12. TROUBLESHOOTING ..........................................................................................12-1
13. EXPLODED VIEWS AND SPARE PARTS LISTS.................................................13-1
14. APPENDIX A .........................................................................................................14-1

1-1
INTRODUCTION
Revision Y06-01
Service Manual - WNG/LEX DCI
1. INTRODUCTION
1.1 General
The new WNG DCI / LEX DCI INVERTER split wall mounted range has expanded,
comprising two additional RC (heat pump) models:
● WNG 25 DCI
● WNG 35 DCI
● LEX 25 DCI
● LEX 35 DCI
The indoor WNG units are available as LED or LCD display types, and the indoor LEX
units are available as LED display type featuring esthetic design, compact dimensions,
and low noise operation.
1.2 Main Features
The WNG DCI INV and LEX DCI INV series benefits from the most advanced
technological innovations, namely:
● DC inverter technology.
● R410A.
● High COP.
● Lego concept.
● Pre-Charged units up to the max’ allowing tubing distance.
● Networking system connectivity.
● A dry contact for clock or power shedding functions (configurable).
● Base heater connection.
● Cooling operation at outdoor temperature down to -10°C.
● Heating operation at outdoor temperature down to -15°C.
● Supports Indoor Air Quality features, such as – Ionizer, Active Electrostatic
Filter.
● Indoor large diameter cross flow fan, allowing low noise level operation.
● Bended indoor coil with treated aluminum fins and coating for improved
efficiency.
● Easy access to the interconnecting tubing and wiring connections, so that
removing the front grill or casing is not necessary.
● Refrigerant pipes can be connected to the indoor unit from 5 different optional
directions.
● Water condensate tray is equipped with two optional drain connections.
● Automatic treated air sweep.
● Low indoor and outdoor noise levels.
● Easy installation and service.

1-2
INTRODUCTION
Revision Y06-01 Service Manual - WNG/LEX DCI
1.3 Indoor Unit
The indoor unit is wall mounted, and can be easily fitted to many types of residential
and commercials applications.
● WNG 25, 35
New design is available in LCD and LED versions.
Old design is available in LED version only.
● LEX 25, 35
New design is available in LED version.
Indoor Unit features:
Feature WNG 25, 35 LEX 25, 35
Display LCD or LED LED
Ionizer YES
ESF YES
Fresh air Optional
Indoor fan motor Variable speed (PG)
Horizontal motorized louver YES
Vertical motorized louver Optional
Heating element NO
M2L Cable port YES
Dry contact Presence detector or (jumper selected) power shedding
1.4 Filtration
The WNG DCI INV/LEX DCI series presents several types of air filters:
● Easily accessible, and re-usable pre-filters (mesh)
● Pre-charged electrostatic filter (disposable)
● Active carbon filter (disposable)
● ESF. Active Electro Static re-usable filter (optional)
1.5 Ionizer (Optional)
A special design Ionizer protected by unique patents integrated into the indoor unit,
generating negative ions to the room providing comfort and upgraded indoor air quality.

1-3
INTRODUCTION
Revision Y06-01
Service Manual - WNG/LEX DCI
1.6 Control
The microprocessor indoor controller, and an infrared remote control, supplied as
standard, provide complete operating function and programming.
Remote controllers: RC-2/3/4/5/7, RC-4i-1, RCW, μBMS.
Networking system Airconet version 4.2 and up, MIU SW version H8 and up.
For further details please refer to the Operational Manual, Appendix A.
1.7 Outdoor Unit
The WNG DCI INV / LEX DCI INV outdoor units can be installed as floor or wall
mounted units by using a wall supporting bracket. The metal sheets are protected
by anti- corrosion paint work allowing long life resistance. All outdoor units are pre-
charged. For further information please refer to the Product Data Sheet, Chapter 2.
● ONG 25 DCI
● ONG 35 DCI
Outdoor Unit Feature
Feature ONG 25, 35 DCI
Display 3 LED’s
Base Heater Optional
Outdoor Fan Variable speed DC Inverter
M2L cable Port No
1.8 Tubing Connections
Flare type interconnecting tubing to be produced on site.
For further details please refer to the Installation Manual, Chapter 9.
1.9 Accessories
Item Description
MIU (WNG/LEX) MODBUS interface unit
MIU (K) MODBUS interface unit
RS485 Adapter
To be used as an interface
with RCW or μBMS remote
controllers
Base Heater
M2L cable Port
For further details please refer to Optional Accessories, Chapter 17.
1.10 Inbox Documentation
Each unit is supplied with its own installation and operation manuals.

1-4
INTRODUCTION
Revision Y06-01 Service Manual - WNG/LEX DCI
1.11 Matching Table
1.11.1 R410A
OUTDOOR
UNITS
INDOOR UNITS
MODEL REFR” WNG25
DCI
WNG35
DCI K25DCI K35DCI LEX 25DCI
LEX
35DCI
ONG25
DCI R410A √√√
ONG35
DCI R410A √√√
The above table lists outdoor units and WNG/LEX indoor units which can be matched together. In
addition the listed outdoor units can be matched with other types of indoor units such as
cassettes.
For further information please refer to the relevant Service Manual.

2-1
PRODUCT DATA SHEET
Revision Y06-01Service Manual - WNG/LEX DCI
(1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN 14511.
(2) Airflow in ducted units; at nominal external static pressure.
(3) Sound power in ducted units is measured at air discharge.
(4) Sound pressure level measured at 1 meter distance from unit.
2. PRODUCT DATA SHEET
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2-2
PRODUCT DATA SHEET
Revision Y06-01 Service Manual - WNG/LEX DCI
(1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN 14511.
(2) Airflow in ducted units; at nominal external static pressure.
(3) Sound power in ducted units is measured at air discharge.
(4) Sound pressure level measured at 1 meter distance from unit.
2.2 WNG 35 DCI
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2-3
PRODUCT DATA SHEET
Revision Y06-01Service Manual - WNG/LEX DCI
2.3 LEX 25 DCI
Units
Btu/hr
kW
kW
W/W
V/Ph/Hz
A
A
A
H/M/L RPM
H/M/L m3/hr
Min-Max Pa
H/M/L dB(A)
H/M/L dB(A)
l/hr
mm
WxHxD mm
kg
WxHxD mm
kg
units
units
H/L RPM
H/L m3/hr
H/L dB(A)
H/L dB(A)
WxHxD mm
kg
WxHxD mm
kg
Units
units
kg/m
g/m
In.(mm)
In.(mm)
m.
m.
kW
(1)Airflow in ducted units;at nominal external static pressure.
(2)Sound power in ducted units is measured at air discharge.
(3)Sound pressure level measured at 1-meter distance from unit.
(4)Rating conditions in accordance to ISO 5151 and ISO 13253 (for ducted units).
0
50/39
38/26
51/39
39/26
Others
Max.10
Operation control type Remote control
Heating elements
OUTDOOR
Refrigerant control Electronical Expansion Valve
Additional charge No need
Refrigerant type R410A
Refrigerant chargless distance 1.1kg/7.5m
Connections
between units
Liquid line 1/4"(6.35)
Suction line 3/8"(9.53)
Max.tubing length Max.20
Max.height difference
Stacking height 3 levels
Package dimensions 945*395*655
Packaged weight 42
Units per pallet 9
Dimensions 795*290*610
Weight 38
Sound pressure level(3)
60
50
61
51
Fan speeds 830/550
1780
Sound power level
Air flow
Stacking height 9levels
Fan type & quantity Propeller x 1
Compressor type,model Single Rotary DC Inverter,Panasonic 5RS102XAB
Packaged weight 14
Units per pallet 36
Weight 11.5
Package dimensions 870*285*355
1
Condenstate drain tube I.D 16
Dimensions 810*210*285
Sound power level (2)
Sound pressure level(3)
Circuit breaker rating 15
INDOOR
Fan type & quantity Crossflow x 1
Fan speeds
Air flow (1)
Moisture removal
External static pressure
Rated current
Starting current 10.5
2.7 3.8
1050/900/800 1100/950/800
530/430/330 570/460/350
4.20
Energy efficiency class
Power supply 220-240V/Single/50Hz
AA
0.81(0.39-1.6)
4.20
Capacity (4) 8530(4780-12280) 11600(5120-17060)
2.5(1.4-3.6) 3.4(1.5-5.0)
Power input (4)
EER (Cooling) or COP(Heating) (4)
0.595(0.42-1.0)
Installation Method of Pipe Flared
Characteristics Cooling Heating
Model Indoor Unit LEX 25 DCI
Model Outdoor Unit DCI 25 R410A

2-4
PRODUCT DATA SHEET
Revision Y06-01 Service Manual - WNG/LEX DCI
Units
Btu/hr
kW
kW
W/W
V/Ph/Hz
A
A
A
H/M/L RPM
H/M/L m3/hr
Min-Max Pa
H/M/L dB(A)
H/M/L dB(A)
l/hr
mm
WxHxD mm
kg
WxHxD mm
kg
units
units
H/L RPM
H/L m3/hr
H/L dB(A)
H/L dB(A)
WxHxD mm
kg
WxHxD mm
kg
Units
units
kg/m
g/m
In.(mm)
In.(mm)
m.
m.
kW
(1)Airflow in ducted units;at nominal external static pressure.
(2)Sound power in ducted units is measured at air discharge.
(3)Sound pressure level measured at 1-meter distance from unit.
(4)Rating conditions in accordance to ISO 5151 and ISO 13253 (for ducted units).
Model Indoor Unit LEX 35 DCI
Model Outdoor Unit DCI 35 R410A
Installation Method of Pipe Flared
Characteristics Cooling Heating
1.125(0.39-1.75)
3.82
Capacity (4) 11940(4780-14670) 14670(5100-19790)
3.5(1.4-4.3) 4.3(1.5-5.8)
Power input (4)
EER (Cooling) or COP(Heating) (4)
0.99(0.42-1.25)
3.54
Energy efficiency class
Power supply 220-240V/Single/50Hz
AA
Rated current
Starting current 10.5
4.6 5.2
Circuit breaker rating 15
INDOOR
Fan type & quantity Crossflow x 1
Fan speeds
Air flow (1)
External static pressure
Sound power level (2)
Sound pressure level(3)
1100/950/800 1150/1000/850
Moisture removal 1.5
550/450/350 580/480/370
52/39
39/26
52/39
40/26
Condenstate drain tube I.D 16
Dimensions 810*210*285
Weight 11.5
Package dimensions 870*285*355
Packaged weight 14
Units per pallet 36
Stacking height 9levels
Fan type & quantity Propeller x 1
Single Rotary DC Inverter,Panasonic 5RS102XAB
Fan speeds 830/550
1780
Sound power level
Air flow
Sound pressure level(3)
62
52
62
52
Dimensions 795*290*610
Weight 38.5
Package dimensions 945*395*655
Packaged weight 42.5
Max.tubing length Max.20
Max.height difference
Refrigerant type R410A
Refrigerant chargless distance 1.2kg/7.5m
Additional charge No need
Connections
between units
Electronical Expansion Valve
Compressor type,model
Suction line 3/8"(9.53)
Liquid line 1/4"(6.35)
Units per pallet 9
Stacking height 3 levels
0
Others
Max.10
Operation control type Remote control
Heating elements
OUTDOOR
Refrigerant control
2.4 LEX 35 DCI

3-1
RATING CONDITIONS
Revision Y06-01
Service Manual - WNG/LEX DCI
3. RATING CONDITIONS
Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units).
Cooling:
Indoor: 27oC DB 19oC WB
Outdoor: 35 oC DB
Heating:
Indoor: 20oC DB
Outdoor: 7oC DB 6oC WB
3.1 Operating Limits
3.1.1 R410A
Indoor Outdoor
Cooling Upper limit 32oC DB 23oC WB 46oC DB
Lower limit 21oC DB 15oC WB -10oC DB
Heating Upper limit 27oC DB 24oC DB 18oC WB
Lower limit 10oC DB -15oC DB -16oC WB
Voltage 198 – 264 V

4-1
OUTLINE DIMENSIONS
Revision Y06-01
Service Manual - WNG/LEX DCI
4. OUTLINE DIMENSIONS
4.1 Indoor Unit: WNG 25, 35 DCI
4.2 Indoor Unit: LEX 25, 35 DCI

4-2
OUTLINE DIMENSIONS
Revision Y06-01 Service Manual - WNG/LEX DCI
4.3 Outdoor Unit: ONG 25,35 DCI

5-1
PERFORMANCE DATA
Revision Y06-01
Service Manual - WNG/LEX DCI
5. PERFORMANCE DATA
5.1 WNG 25/LEX 25 DCI
5.1.1 Cooling Capacity (kW) - Run Mode
ID COIL ENTERING AIR DB/WB TEMPERATURE [ºC]
OD COIL
ENTERING AIR DB
TEMPERATURE
[C0]
DATA 22/15 24/17 27/19 29/21 32/23
TC 80 - 110 % of nominal
SC 80 - 105 % of nominal
-10 - 20
(protection range)
PI 25 - 50 % of nominal
TC 2.42 2.57 2.73 2.89 3.05
SC 1.64 1.67 1.71 1.74 1.77
25
PI 0.47 0.48 0.49 0.49 0.50
TC 2.30 2.46 2.62 2.77 2.93
SC 1.60 1.63 1.67 1.70 1.73
30
PI 0.52 0.53 0.54 0.55 0.56
TC 2.18 2.34 2.50 2.66 2.82
SC 1.56 1.59 1.63 1.66 1.69
35
PI 0.58 0.59
0.60 0.60 0.61
TC 2.07 2.23 2.38 2.54 2.70
SC 1.52 1.55 1.58 1.62 1.65
40
PI 0.63 0.64 0.65 0.66 0.67
TC 1.93 2.09 2.24 2.40 2.56
SC 1.47 1.50 1.53 1.57 1.60
46
PI 0.70 0.71 0.72 0.72 0.73
LEGEND
TC – Total Cooling Capacity, kW
SC – Sensible Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (oC)
DB – Dry Bulb Temp., (oC)
ID – Indoor
OU - Outdoor
5.1.2 Capacity Correction Factors
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
20 25 30 35 40 45
Outdoor Temperature [deg C]
Capacity Ratio

5-2
PERFORMANCE DATA
Revision Y06-01 Service Manual - WNG/LEX DCI
5.1.3 Heating Capacity (kW) - Run Mode)
ID COIL ENTERING AIR DB TEMPERATURE [ºC]
OD COIL
ENTERING AIR
DB/WB
TEMPERATURE
[ºC]
DATA 15 20 25
TC 2.16 2.01 1.86
-15/-16 PI 0.49 0.54 0.58
TC 2.41 2.26 2.11
-10/-12 PI 0.59 0.64 0.68
TC 2.59 2.44 2.29
-7/-8 PI 0.66 0.71 0.76
TC 2.68 2.53 2.38
-1/-2 PI 0.70 0.75 0.80
TC 2.75 2.59 2.44
2/1 PI 0.72 0.77 0.82
TC 3.55 3.40 3.25
7/6
PI 0.76 0.81 0.86
TC 3.75 3.60 3.44
10/9 PI 0.81 0.86 0.90
TC 3.94 3.79 3.64
15/12 PI 0.85 0.90 0.95
15-24 TC 85 - 105 % of nominal
(Protection Range) PI 80 - 120 % of nominal
LEGEND
TH – Total Heating Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (oC)
DB – Dry Bulb Temp., (oC)
ID – Indoor
OU - Outdoor
5.1.4 Capacity Correction Factors
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
-15 -10 -5 0 5 10 15
Outdoor WB Temperature [deg C]
Capacity Ratio
TC

5-3
PERFORMANCE DATA
Revision Y06-01
Service Manual - WNG/LEX DCI
5.2 Capacity Correction Factor Due to Tubing Length
5.2.1 Cooling
0.91
0.92
0.93
0.94
0.95
0.96
0.97
0.98
0.99
1.00
1.01
3 4 5 6 7 8 9 1011121314151617181920
Tubing Length [m]
Capacity Ratio
5.2.2 Heating
0.90
0.92
0.94
0.96
0.98
1.00
1.02
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Tubing Length [m]
Capacity Ratio

5-4
PERFORMANCE DATA
Revision Y06-01 Service Manual - WNG/LEX DCI
5.3 WNG 35/LEX 35 DCI
5.3.1 Cooling Capacity (kW) - Run Mode
ID COIL ENTERING AIR DB/WB TEMPERATURE [ºC]
OD COIL
ENTERING AIR DB
TEMPERATURE
[ºC]
DATA 22/15 24/17 27/19 29/21 32/23
TC 80 - 110 % of nominal
SC 80 - 105 % of nominal
-10 - 20
(protection range)
PI 25 - 50 % of nominal
TC 3.38 3.60 3.83 4.05 4.27
SC 2.40 2.45 2.50 2.55 2.60
25
PI 0.78 0.79 0.81 0.82 0.84
TC 3.22 3.44 3.66 3.88 4.11
SC 2.34 2.39 2.44 2.49 2.54
30
PI 0.87 0.88 0.90 0.91 0.93
TC 3.06 3.28 3.50 3.72 3.94
SC 2.28 2.33 2.38 2.43 2.48
35
PI 0.96 0.98
0.99 1.00 1.02
TC 2.89 3.12 3.34 3.56 3.78
SC 2.22 2.27 2.32 2.37 2.42
40
PI 1.05 1.07 1.08 1.10 1.11
TC 2.70 2.92 3.14 3.36 3.58
SC 2.15 2.20 2.25 2.30 2.34
46
PI 1.16 1.18 1.19 1.21 1.22
LEGEND
TC – Total Cooling Capacity, kW
SC – Sensible Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (oC)
DB – Dry Bulb Temp., (oC)
ID – Indoor
OU - Outdoor
5.3.2 Capacity Correction Factors
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
20 25 30 35 40 45
Outdoor Temperature [deg C]
Capacity Ratio

5-5
PERFORMANCE DATA
Revision Y06-01
Service Manual - WNG/LEX DCI
5.3.3 Heating Capacity (kW) - Run Mode
ID COIL ENTERING AIR DB TEMPERATURE [ºC]
OD COIL
ENTERING AIR
DB/WB
TEMPERATURE
[ºC]
DATA 15 20 25
TC 2.74 2.55 2.35
-15/-16 PI 0.68 0.74 0.81
TC 3.05 2.86 2.66
-10/-12 PI 0.81 0.88 0.95
TC 3.28 3.09 2.90
-7/-8 PI 0.92 0.99 1.06
TC 3.39 3.20 3.01
-1/-2 PI 0.97 1.04 1.11
TC 3.47 3.28 3.09
2/1 PI 1.00 1.07 1.14
TC 4.49 4.30 4.11
7/6 PI 1.06 1.13 1.19
TC 4.74 4.55 4.36
10/9 PI 1.12 1.19 1.26
TC 4.99 4.80 4.60
15/12 PI 1.18 1.25 1.32
15-24 TC 85 - 105 % of nominal
(Protection Range) PI 80 - 120 % of nominal
LEGEND
TH – Total Heating Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (oC)
DB – Dry Bulb Temp., (oC)
ID – Indoor
OU - Outdoor
5.3.4 Capacity Correction Factors
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
-15 -10 -5 0 5 10 15
Outdoor WB Temperature [deg C]
Capacity Ratio
TC

5-6
PERFORMANCE DATA
Revision Y06-01 Service Manual - WNG/LEX DCI
5.4 Capacity Correction Factor Due to TUbing Length
5.4.1 Cooling
0.91
0.92
0.93
0.94
0.95
0.96
0.97
0.98
0.99
1.00
1.01
3 4 5 6 7 8 9 1011121314151617181920
Tubing Length [m]
Capacity Ratio
5.4.2 Heating
0.90
0.92
0.94
0.96
0.98
1.00
1.02
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Tubing Length [m]
Capacity Ratio