Electra DNG 18 User manual

DNG series
REFRIGERANT
R410A
HEAT PUMP
COOLING ONLY
FEBRUARY 2005
Indoor Units Outdoor Units
DNG 18 GC18
DNG 24 OU7-24
DNG 30 OU8-30
DNG 37 OU10-36
DNG 44 OU10-44
Service Manual

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LIST OF EFFECTIVE PAGES
Revision Y05-01 DATA BOOK - DNG Series
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 ........ 24 February 2005
Total number of pages in this publication is 139 consisting of the following:
Page
No.
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No. #
Page
No.
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No. #
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No.
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No. #
Title ....................... 0
A ........................... 0
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1-1 - 1-4 ................ 0
2-1 - 2-4 ................ 0
3-1 - 3-2 ................ 0
4-1 - 4-2 ................ 0
5-1 - 5-12 .............. 0
6-1 - 6-8 ................ 0
7-1 - 7-2 ................ 0
8-1 - 8-2 ................ 0
9-1 - 9-2 ................ 0
10-1-10-2 .............. 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.

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TABLE OF CONTENTS
Revision Y05-01
Service Manual - DNG Series
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 & PRESSURE CURVES ................................................5-1
6. AIRFLOW CURVES ..............................................................................................6-1
7. SOUND LEVEL CHARACTERISTICS ..................................................................7-1
8. ELECTRICAL DATA..............................................................................................8-1
9. WIRING DIAGRAMS .............................................................................................9-1
10. ELECTRICAL CONNECTIONS.............................................................................10-1
11. REFRIGERATION DIAGRAMS.............................................................................11-1
12. TUBING CONNECTIONS......................................................................................12-1
13. CONTROL SYSTEM .............................................................................................13-1
14. TROUBLESHOOTING ..........................................................................................14-1
15. EXPLODED VIEWS AND SPARE PARTS LISTS.................................................15-1
16. APPENDIX A .........................................................................................................16-1

1-1
INTRODUCTION
Revision Y05-01Service Manual - DNG Series
1. INTRODUCTION
1.1 General
The new DNG ducted split unit range comprises the ST (cooling only) as well as RC
(heat pump) models, it is available at 1PH, 3PH as follow:
• 1PH DNG 18, 24, 30, 37
• 3PH DNG 18, 24, 30, 37, 44
Remote control compatibility
• The DNG unit is compatible with remote controls RC3, RC4, RCW1, RCW2
1.2 Main Features
The DNG series benefits from the most advanced technological innovations, namely:
• R410A refrigerant for all the range.
• The only Single Fan, medium capacity, low silhouette ducted unit
• High Static Pressure in the low silhouette category.
• Low indoor and outdoor sound level
• Low Silhouette 260-300mm height that simplify the false ceiling construction.
• Small volume, easy for installation (require small space for installation)
• Water drainage capability without siphon near the unit.
• Built in over-flow protection against condensate water
• 50 meters pipes installation in charge-less system
• High COP by switching to R 410A and enlarging indoor coil sizes
• Complies with M1 regulations
• Compatible with Saginomya “all season kit” that permits operation in cooling
mode up to -5ºC outdoor temperature.
• Easy service access by removing the drain pan.
• Microprocessor control.
• Infrared remote control with liquid crystal display.
CONTENT

1-2
INTRODUCTION
Revision Y05-01 Service Manual - DNG Series
1.3 Indoor Unit
The indoor unit can fit easily to many types of residential and commercials applications.
It includes:
•High technology plastic fan and fan housing.
•A drain pool that is under the entire unit with internal downward slope.
•An over-flow switch that stops compressor operation in case drainage tube is
blocked.
•A bended coil with treated aluminium fins.
•3-speed fan motor with internal protection with extra speed for higher external
static pressure.
•Advanced electronic control box assembly with 1.8-meter cable to allow
installation at a more accessible area.
•All the tubing connections are in the back of the unit to allow easy outlet to left
or right side of the unit.
•Field options:
(1) Electrical Heaters for 2005
(2) External water pump
(3) Airconet connection
(4) Plenum kit for connection of flexible hoses at air outlet.
1.4 Filtration
•The unit is equipped with pre-filters.
•Easy and versitile access, rear or buttom, can be easily adjusted by the
installer.
1.5 Ioniser (Optional)
A special design Ioniser protected by unique patents integrated into the indoor unit,
generating negative ions to the room providing comfort and upgraded indoor air quality.
1.6 Control
The microprocessor indoor controller, and an infrared remote control, supplied as
standard, provides complete operating function and programming. For further details,
please refer to the Operation Manual,
CONTENT

1-3
INTRODUCTION
Revision Y05-01Service Manual - DNG Series
1.7 Outdoor Unit
The DNG 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 paintwork
allowing long life resistance. All outdoor units are pre-charged. For further information,
please refer to the Product Data Sheet, Chapter 2.
It includes:
• Compressor mounted in a soundproofed compartment :
Rotary – for DNG 18, 24, 30, 37
Scroll – for DNG 44
• Improved 3- blades axial fans for noise reduction.
• Outdoor coil with hydrophilic fins for RC units optimised for operation with R
410A refrigerant.
• Fan grill air outlet.
• Service valves” flare” type connection.
• Service ports for high/ low pressure measurement.
• Interconnecting wiring terminal block.
1.8 Tubing Connections
Flare type-interconnecting tubing to be produced on site.
All the units from 7KW and up can be installed with 50-meter pipe length and 25 meter
height difference without oil traps.
For further details, please refer to the Installation Manual.
1.9 Accessories
ASK (All Season Kit):
For low ambient working conditions in cooling, an ASK can be installed inside the
outdoor unit. This kit allows cooling operation down to outdoor temperature of -10 ºC by
gradually controlling the outdoor fan speed motor.
RCW Wall Mounted Remote Control
The RCW remote control is mounted on the wall, and controls the unit either as an
infrared remote control or as a wired controller. The wired controller can control up to
10 Indoor units with the same program settings and adjustments.
For further details, please refer to the Technical Service Manual.
1.10 Inbox Documentation
Each unit includes its own installation and operation manuals.
CONTENT

2-1
PRODUCT DATA SHEET
Revision Y05-01Service Manual - DNG Series
2. PRODUCT DATA SHEET
2.1 R410C
Model Indoor Unit DNG 18
Model Outdoor Unit GC 18 R410A
Installation Method DUCTED
Characteristics Units Cooling Heating
Btu/hr 19100 18000
Capacity(1)
kW 5.6 5.3
Power Input(1) kW 1.8 1.7
COP(1) W/W 3.05 3.12
Energy Efficiency Class B D
Power Supply V/Ph/Hz 230/50/1
Rated Current A 8.2 7.5
Starting Current A 43
Circuit Breaker Rating A 20
Fan Type & Quantity CENTRIFUGAL X1
Fan Speed H/M/L RPM 630 530 425
Airflow(2) H/M/L m3/hr 1150 875 730
External Static Pressure Min-Max Pa 25-60
Sound Power Level(3) H/M/L dB (A) 55 53 50
Sound Pressure Level (4) H/M/L dB (A) 45 42 40
Moisture Removal L/hr 2.0
Condensate Drain Tube I.D. mm 22
Dimensions W/H/D mm 770 260 690
Weight kg 29
Package Dimensions W/H/D mm 959 315 854
Packaged Weight kg 31
Units per Pallet Units 6
INDOOR
Stacking Height Units 6
Refrigerant Control Capillary
Compressor Type, Model Rotary
Fan Type & Quantity Axial & 1
Fan Speeds H/L RPM 815
Airflow H/L m3/hr 2480
Sound Power Level H/L dB (A) 68
Sound Pressure Level (4) H/L dB (A) 58
Dimensions W/H/D mm 846 690 302
Weight kg 56
Package Dimensions W/H/D mm 990 770 430
Packaged Weight kg 61
Units per Pallet Units 9
Stacking Height Units 3
Refrigerant Type R 410A
Refrigerant Chargeless Distance kg/m 1.75/10
Additional Charge Per 1 Meter g/m 25
Liquid Line In 1/4
Suction Line In 1/2
Max. Tubing Length m 25
OUTDOOR
Connections
Between Units
Max. Height Difference m 15
Operation Control Type LCD Remote Control
Heating Elements kW
Others
1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN14511.
(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.
CONTENT

2-2
PRODUCT DATA SHEET
Revision Y05-01 Service Manual - DNG Series
Model Indoor Unit DNG 18
Model Outdoor Unit GC 18 3PH R410A
Installation Method DUCTED
Characteristics Units Cooling Heating
Btu/hr 19100 18000
Capacity(1)
kW 5.6 5.3
Power Input(1) kW 1.8 1.7
COP(1) W/W 3.05 3.12
Energy Efficiency Class B D
Power Supply V/Ph/Hz 400/50/1
Rated Current A 3*3.5 3*3.1
Starting Current A 26
Circuit Breaker Rating A 3*10
Fan Type & Quantity CENTRIFUGAL X1
Fan Speed H/M/L RPM 630 530 425
Airflow(2) H/M/L m3/hr 1150 875 730
External Static Pressure Min-Max Pa 25-60
Sound Power Level(3) H/M/L dB (A) 55 53 50
Sound Pressure Level (4) H/M/L dB (A) 45 42 40
Moisture Removal L/hr 2.0
Condensate Drain Tube I.D. mm 22
Dimensions W/H/D mm 770 260 690
Weight kg 29
Package Dimensions W/H/D mm 959 315 854
Packaged Weight kg 31
Units per Pallet Units 6
INDOOR
Stacking Height Units 6
Refrigerant Control Capillary
Compressor Type, Model Rotary
Fan Type & Quantity Axial & 1
Fan Speeds H/L RPM 815
Airflow H/L m3/hr 2480
Sound Power Level H/L dB (A) 68
Sound Pressure Level (4) H/L dB (A) 58
Dimensions W/H/D mm 846 690 302
Weight kg 56
Package Dimensions W/H/D mm 990 770 430
Packaged Weight kg 61
Units per Pallet Units 9
Stacking Height Units 3
Refrigerant Type R 410A
Refrigerant Chargeless Distance kg/m 1.98/10
Additional Charge Per 1 Meter g/m 25
Liquid Line In 1/4
Suction Line In 1/2
Max. Tubing Length m 25
OUTDOOR
Connections
Between Units
Max. Height Difference m 15
Operation Control Type LCD Remote Control
Heating Elements kW
Others
1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN14511.
(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.
CONTENT

2-3
PRODUCT DATA SHEET
Revision Y05-01Service Manual - DNG Series
Model Indoor Unit DNG 24
Model Outdoor Unit OU7-24 R410A
Installation Method DUCTED
Characteristics Units Cooling Heating
Btu/hr 23500 23850
Capacity(1)
kW 6.9 7.0
Power Input(1) kW 2.4 2.3
COP(1) W/W 2.9 3.04
Energy Efficiency Class C D
Power Supply V/Ph/Hz 230/50/1
Rated Current A 10.8 10.5
Starting Current A 66
Circuit Breaker Rating A 20
Fan Type & Quantity CENTRIFUGAL X1
Fan Speed H/M/L RPM 680 630 530
Airflow(2) H/M/L m3/hr 1210 1100 840
External Static Pressure Min-Max Pa 25-60
Sound Power Level(3) H/M/L dB (A) 60 58 55
Sound Pressure Level (4) H/M/L dB (A) 48 45 43
Moisture Removal L/hr 2.3
Condensate Drain Tube I.D. mm 22
Dimensions W/H/D mm 770 260 690
Weight kg 29
Package Dimensions W/H/D mm 959 315 854
Packaged Weight kg 31
Units per Pallet Units 6
INDOOR
Stacking Height Units 6
Refrigerant Control Capillary
Compressor Type, Model Rotary
Fan Type & Quantity Axial & 1
Fan Speeds H/L RPM 850
Airflow H/L m3/hr 3100
Sound Power Level H/L dB (A) 67
Sound Pressure Level (4) H/L dB (A) 58
Dimensions W/H/D mm 900 680 340
Weight kg 78
Package Dimensions W/H/D mm 985 730 435
Packaged Weight kg 82
Units per Pallet Units 6
Stacking Height Units 2
Refrigerant Type R 410A
Refrigerant Chargeless Distance kg/m 2,16/ 12.5
Additional Charge Per 1 Meter g/m 25
Liquid Line In 3/8
Suction Line In 5/8
Max. Tubing Length m 50
OUTDOOR
Connections
Between Units
Max. Height Difference m 25
Operation Control Type LCD Remote Control
Heating Elements kW
Others Crankcase heater (50W)
1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN14511.
(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.
CONTENT

2-4
PRODUCT DATA SHEET
Revision Y05-01 Service Manual - DNG Series
Model Indoor Unit DNG 24
Model Outdoor Unit OU7-24T R410A
Installation Method DUCTED
Characteristics Units Cooling Heating
Btu/hr 23500 23850
Capacity(1)
kW 6.9 7.0
Power Input(1) kW 2.4 2.3
COP(1) W/W 2.9 3.03
Energy Efficiency Class C D
Power Supply V/Ph/Hz 400/50/3
Rated Current A 3*6.0 3*5.4
Starting Current A
Circuit Breaker Rating A 3*10
Fan Type & Quantity CENTRIFUGAL X1
Fan Speed H/M/L RPM 680 630 530
Airflow(2) H/M/L m3/hr 1210 1100 840
External Static Pressure Min-Max Pa 25-60
Sound Power Level(3) H/M/L dB (A) 60 58 55
Sound Pressure Level (4) H/M/L dB (A) 48 45 43
Moisture Removal L/hr 2.3
Condensate Drain Tube I.D. mm 22
Dimensions W/H/D mm 770 260 690
Weight kg 29
Package Dimensions W/H/D mm 959 315 854
Packaged Weight kg 31
Units per Pallet Units 6
INDOOR
Stacking Height Units 6
Refrigerant Control Capillary
Compressor Type, Model Rotary
Fan Type & Quantity Axial & 1
Fan Speeds H/L RPM 850
Airflow H/L m3/hr 3100
Sound Power Level H/L dB (A) 67
Sound Pressure Level (4) H/L dB (A) 58
Dimensions W/H/D mm 900 680 340
Weight kg 78
Package Dimensions W/H/D mm 985 730 435
Packaged Weight kg 82
Units per Pallet Units 6
Stacking Height Units 2
Refrigerant Type R 410A
Refrigerant Chargeless Distance kg/m 2,16/ 12.5
Additional Charge Per 1 Meter g/m 25
Liquid Line In 3/8
Suction Line In 5/8
Max. Tubing Length m 50
OUTDOOR
Connections
Between Units
Max. Height Difference m 25
Operation Control Type LCD Remote Control
Heating Elements kW
Others Crankcase heater (50W), 3 Phase Protector
1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN14511.
(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.
CONTENT