Electra DNC series User manual

DNC series
REFRIGERANT
R22
R4O7C
HEAT PUMP
COOLING ONLY
JULY 2005
Service Manual
Indoor Units Outdoor Units
DNC 35 (955) OU8-33 R22/R407C
DNC 38 (1155) OU10-38 R22/R407C
DNC 44 (1255) OU10-44 R22
OU10-50 R407C

A
LIST OF EFFECTIVE PAGES
Revision Y05-01 Service Manual - DNC 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 ........ July 2005
Total number of pages in this publication is 139 consisting of the following:
Page
No.
Revision
No. #
Page
No.
Revision
No. #
Page
No.
Revision
No. #
Title ....................... 0
A ........................... 0
i............................. 0
1-1 - 1-2 ................ 0
2-1 - 2-10 .............. 0
3-1 ........................ 0
4-1 - 4-2 ................ 0
5-1 - 5-41 .............. 0
6-1 - 6-3 ................ 0
7-1 - 7-5 ................ 0
8-1 - 8-34 .............. 0
9-1 - 9-2 ................ 0
10-1-10-21 ............ 0
•Zero in this column indicates an original pag
*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 Y05-01
Service Manual - DNC Series
Table of Contents
1. FEATURES............................................................................................................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. REFRIGERATION DIAGRAMS.............................................................................6-1
7. WIRING DIAGRAMS .............................................................................................7-1
8. CONTROL SYSTEM .............................................................................................8-1
9. TROUBLESHOOTING ..........................................................................................9-1
10. EXPLODED VIEWS AND SPARE PARTS LISTS.................................................10-1

1-1
FEATURES
Revision Y05-01Service Manual - DNC Series
1. FEATURES
MODES OF OPERATION , FUNCTIONS AND FEATURES
The air conditioner is based on a microcomputer control system with remote wall mounted LCD display
and control unit, programmed for the following modes and functions:
Cools, dehumidifies and filters the room air. Maintains desired site temperature.
COOL
Heats and filters the air. Maintains desired site temperature.
HEAT
Automatically switches from COOLING to HEATING or from HEATING to
COOLING, maintaining the desired temperature according to the room
conditions.
AUTO
Dehumidifies and moderately cools the room. In DRY Mode the air conditioner
operates at an increased dehumidifying power. This function is recommended to
be used when temperature is rather cool but the humidity is high.
DRY
Recalculates and filters the room air. Maintains constant air movement in the
room.
FAN
The air conditioner automatically selects the FAN speed in accordance to the
room temperature. At the start, the unit operates at high fan speed. As the
room air gets closer to the desired temperature, the fan switches on a lower
speed for quieter operation.
AUTO FAN
In HEATING and in AUTO FAN, the fan will be turned off when the compressor
is not in operation and will not be restarted, unless the indoor coil reaches
adequate temperature. This HOT KEEP feature prevents uncomfortable cold air
drafts. AUTO FAN Is therefore, recommended to be used when the air
conditioner is in HEATING mode.
HOT KEEP
Switches the temperature sensing point to the place where the remote control is
located (in normal operation the temperature sensor is located behind the intake
grille of the air conditioner). This function is designed to provide a personalized
environment by transmitting the temperature control information from where the
remote control is placed. The communication between the remote control and
the central control unit is done by infrared signal. When using this function, the
remote control should always be aimed without obstructions at the air
conditioner.
I FEEL
Real time control and display, automatically turns the air conditioner ON or OFF
according to the time of day setting, ensuring comfort conditions before
returning home, without wasting electricity. It turns off the air conditioner
automatically when sleeping.
TIMER
Designed to automatically reset the temperature setting. In COOLING mode the
temperature rises one degree centigrade after each consecutive hour, up to
three hours, from the start of the mode. In HEATING mode, the reverse occurs,
the air conditioner lowers its temperature one degree every hour. When in
SLEEP Mode, the operation will automatically turn off after seven hours. This
function saves energy when the air conditioner is operating during off hours.
SLEEP

1-2
FEATURES
Revision Y05-01 Service Manual - DNC Series
Measures and displays room temperature.
ROOM TEMP.
Filter indicator on the indoor unit display is turned on when the filter requires
cleaning. After cleaning and reinstalling the filter, the system should be reset.
FILTER
INDICATION
A soft buzzer will sound from the indoor unit display to indicate that a
command sent by the remote control has been accepted and stored in the
unit’s memory. This feature may be easily canceled by the user from the
display panel.
BUZZER
The air conditioner can be turned ON for COOLING or HEATING or be
turned OFF directly from the indoor unit display panel without the use of the
remote control.
ON UNIT
OPERATION
The compressor is protected by a three minute delayed restart.
3-MIN
DELAYED
RUN
The microprocessor retains the last data entry whether or not the unit is
plugged in. Therefore, when the unit restarts after a power disruption or power
failure, it will resume operation in the same mode as before the power
disruption.
MEMORY
Freezes the last operation setting on the remote control. When LOCK is
activated, the remote control will not be able to control the air conditioner.
LOCK

2-1
PRODUCT DATA SHEET
Revision Y05-01Service Manual - DNC Series
2. PRODUCT DATA SHEET
2.1 R22 / R407C
DNC 955 R22
Model
Ceiling Mounted
Installation method
HeatingCoolingUnits
Characteristic 3200031060Btu/hr
93809100W
Capacity
28403370WTotal input
3.302.7W/WCOP
230V/50Hz/1Power supply (voltage, cycle, No of phases)
12.314.6ARated current
20ACircuit breaker rating
Plug Fan x 1Fan type & qty. 500550700RPMFan speed (HI-M-LO) 120013301700m³/hr 7057801000CFM
Airflow (LO-M-HI)
20-80PaStatic Pressure
51.354.857.2dBANoise Power**
44.647.551.8dBANoise Pressure*
3.1l/hDehumidification
16mmCondensate drain tube I.D
1025mmWDimensions
760mmD
300mmH
43KgWeight
1125x975x360(Unit)+1180x870x180(Frame)mmPackage dimensions
I
N
D
O
O
R
U
N
I
T
7unitsStacking height
7unitsUnits per palet
Capillary TubeRefrigerant control
SCROLL LG SQ040PACompressor type & model
AxialFan type & qty.
850RPMFan speeds
3100m³/hr 1820CFM Airflow (std. conditions)
62/69dBANoise Pressure*/ Noise Power
900mmWDimensions
340mmD
860860
mm
H
82KgWeight
903x985x406mmPacking dimensions
2unitsStacking height
6unitsUnits per palet
R22Refrigerant
O
U
T
D
O
O
R
U
N
I
T
16mmCondensate drain tube I.D
3/8”in.liquid
5/8”in.suction
10mheight differenceConnection between units
30mmtubing length
T
U
B
E
S
LCD Remote ControlOperation control type
2x750WHeating elements
8”,10”,12”Ducts Crankcase heater 60WOthers
A
C
C.
* Noise pressure tested at 1m distance from unit
** Noise power for ducted units measured at air outlet side
860
Charge for 7.5 meter pipes length Grams
2450

2-2
PRODUCT DATA SHEET
Revision Y05-01 Service Manual - DNC Series
DNC 955 3PH
Model
Ceiling Mounted
Installation method
HeatingCoolingUnits
Characteristic 3200031060Btu/hr
93809100W
Capacity
27603320WTotal input
3.402.74W/WCOP 400V/50Hz/3Power supply (voltage, cycle, No of phases) 3x7.33x8.7ARated current
20ACircuit breaker rating
Plug Fan x 1Fan type & qty. 500550700RPMFan speed (HI-M-LO)
120013301700m³/hr 7057801000CFM
Airflow (LO-M-HI)
20-80PaStatic Pressure
51.354.857.2dBANoise Power**
44.647.551.8dBANoise Pressure*
3.1l/hDehumidification
16mmCondensate drain tube I.D
1025mmWDimensions
760mmD
300mmH
43KgWeight
1125x975x360(Unit)+1180x870x180(Frame)mmPackage dimensions
I
N
D
O
O
R
U
N
I
T
7unitsStacking height
7unitsUnits per palet
Capillary TubeRefrigerant control
SCROLL LG SQ040YACompressor type & model
AxialFan type & qty.
850RPMFan speeds
3100m³/hr 1820CFM Airflow (std. conditions)
62/69dBANoise Pressure*/ Noise Power
900mmWDimensions
340mmD
mmH
82KgWeight
903x985x406mmPacking dimensions
2unitsStacking height
6unitsUnits per palet
R22Refrigerant
Charge for 7.5 meter pipes length
O
U
T
D
O
O
R
U
N
I
T
16mmCondensate drain tube I.D
3/8”in.liquid
5/8”in.suction
10mheight differenceConnection between units
30mmtubing length
T
U
B
E
S
LCD Remote ControlOperation control type
2x750WHeating elements
8”,10”,12”Ducts Crankcase heater 60W,3PH ProtectorOthers
A
C
C.
* Noise pressure tested at 1m distance from unit
** Noise power for ducted units measured at air outlet side
Grams
2450
860

2-3
PRODUCT DATA SHEET
Revision Y05-01Service Manual - DNC Series
DNC 955 R407C
Model
Ceiling Mounted
Installation method
HeatingCoolingUnits
Characteristic 3120031060Btu/hr
91409100W
Capacity
31503580WTotal input
2.92.54W/WCOP
230V/50Hz/1Power supply (voltage, cycle, No of phases) 13.715.7ARated current
20ACircuit breaker rating
Plug Fan x 1Fan type & qty. 500550700RPMFan speed (HI-M-LO) 120013301700m³/hr 7057801000CFM
Airflow (LO-M-HI)
20-80PaStatic Pressure
51.354.857.2dBANoise Power**
44.647.551.8dBANoise Pressure*
3.1l/hDehumidification
16mmCondensate drain tube I.D
1025mmWDimensions
760mmD
300mmH
43KgWeight
1125x975x360(Unit)+1180x870x180(Frame)mmPackage dimensions
I
N
D
O
O
R
U
N
I
T
7unitsStacking height
7unitsUnits per palet
Capillary TubeRefrigerant control
SCROLL HQ040PACompressor type & model
AxialFan type & qty.
850RPMFan speeds
3100m³/hr 1820CFM Airflow (std. conditions)
62/69dBANoise Pressure*/ Noise Power
900mmWDimensions
340mmD
8860860
mmH
82KgWeight
903x985x406mmPacking dimensions
2unitsStacking height
6unitsUnits per palet
R407CRefrigerant
GramsCharge for 7.5 meter pipes length
O
U
T
D
O
O
R
U
N
I
T
16mmCondensate drain tube I.D
3/8”in.liquid
5/8”in.suction
10mheight differenceConnection between units
30mmtubing length
T
U
B
E
S
LCD Remote ControlOperation control type
2x750WHeating elements
8”,10”,12”Ducts Crankcase heater 60WOthers
A
C
C.
* Noise pressure tested at 1m distance from unit
** Noise power for ducted units measured at air outlet side
2520

2-4
PRODUCT DATA SHEET
Revision Y05-01 Service Manual - DNC Series
DNC 955-3PH R407C
Model
Ceiling Mounted
Installation method
HeatingCoolingUnits
Characteristic 3000030000Btu/hr
87908790W
Capacity
30303370WTotal input
2.92.61W/WCOP 400V/50Hz/3Power supply (voltage, cycle, No of phases) 3x8.03x8.9ARated current
3x10ACircuit breaker rating
Plug Fan x 1Fan type & qty. 500550700RPMFan speed (HI-M-LO)
120013301700m³/hr 7057801000CFM Airflow (LO-M-HI)
20-80PaStatic Pressure
51.354.857.2dBANoise Power**
44.647.551.8dBANoise Pressure*
3.1l/hDehumidification
16mmCondensate drain tube I.D
1025mmWDimensions
760mmD
300mmH
43KgWeight
1125x975x360(Unit)+1180x870x180(Frame)mmPackage dimensions
I
N
D
O
O
R
U
N
I
T
7unitsStacking height
7unitsUnits per palet
Capillary TubeRefrigerant control
SCROLL HQ040YCompressor type & model
AxialFan type & qty.
850RPMFan speeds
3100m³/hr 1820CFM
Airflow (std. conditions)
62/69dBANoise Pressure*/ Noise Power
900mmWDimensions
340mmD
860860
mmH
82KgWeight
903x985x406mmPacking dimensions
2unitsStacking height
6unitsUnits per palet
R407CRefrigerant
Charge for 7.5 meter pipes length
O
U
T
D
O
O
R
U
N
I
T
16mmCondensate drain tube I.D
3/8”in.liquid
5/8”in.suction
10mheight differenceConnection between units
30mmtubing length
T
U
B
E
S
LCD Remote ControlOperation control type
2x750WHeating elements
8”,10”,12”Ducts Crankcase heater 60W,3PH ProtectorOthers
A
C
C.
* Noise pressure tested at 1m distance from unit
** Noise power for ducted units measured at air outlet side
Grams
2530

2-5
PRODUCT DATA SHEET
Revision Y05-01Service Manual - DNC Series
DNC 1155 R22
Model
Ceiling Mounted
Installation method
HeatingCoolingUnits
Characteristic 3822537500Btu/hr 1120011000W
Capacity
39004010WTotal input
3.22.8W/WCOP 230V/50Hz/1Power supply (voltage, cycle,No of phases) 17.017.4ARated current
25ACircuit breaker rating
Plug Fan x 1Fan type & qty.
500550700RPMFan speed (HI-M-LO)
120013301700m³/hr 7057801000CFM Airflow (LO-M-HI)
20-80PaStatic Pressure
54.85657.2dBANoise Power**
47.549.751.8dBANoise Pressure*
3.5l/hDehumidification
16mmCondensate drain tube I.D
1025mmWDimensions
760mmD
300mmH
44KgWeight 1125x975x360(Unit)+1180x870x180(Frame)mmPackage dimensions
7unitsStacking height
7unitsUnits per palet
I
N
D
O
O
R
U
N
I
T
Capillary TubeRefrigerant control
SCROLL ZR47K3-PFJCompressor type & model
Axialx2Fan type & qty.
1125RPMFan speeds
4150m³/hr
2440CFM
Airflow (std. conditions)
57/65dBANoise Pressure*/ Noise Power
900mmWDimensions
340mmD
970mmH
95KgWeight
1020x985x406mmPacking dimensions
2unitsStacking height
6unitsUnits per palet
R22Refrigerant
GramsCharge for 7.5 meter pipes length
O
U
T
D
O
O
R
U
N
I
T
16mmCondensate drain tube I.D
3/8”in.liquid
3/4”in.suction
25mheight differenceConnection between units
50mtubing length
T
U
B
E
S
LCD Remote ControlOperation control type
2x1500WHeating elements
8”,10”,12”Ducts Crankcase heater 33WOthers
A
C
C.
* Noise pressure tested at 1m distance from unit
** Noise power for ducted units measured at air outlet side
2650

2-6
PRODUCT DATA SHEET
Revision Y05-01 Service Manual - DNC Series
DNrtDNC 1155-3PH R2215hgddffgtdf5-3
Model
Ceiling Mounted
Installation method
HeatingCoolingUnits
Characteristic 3750037200Btu/hr 1100010900W
Capacity
34403900WTotal input
3.152.74W/WCOP 400V/50Hz/3Power supply (voltage, cycle,No of phases) 3x9.13x10.3ARated current
3x16ACircuit breaker rating
Plug Fan x 1Fan type & qty.
500550700RPMFan speed (HI-M-LO)
120013301700m³/hr 7057801000CFM Airflow (LO-M-HI)
20-80PaStatic Pressure
54.85657.2dBANoise Power**
47.549.751.8dBANoise Pressure*
3.5l/hDehumidification
16mmCondensate drain tube I.D
1025mmWDimensions
760mmD
300mmH
44KgWeight 1125x975x360(Unit)+1180x870x180(Frame)mmPackage dimensions
7unitsStacking height
7unitsUnits per palet
I
N
D
O
O
R
U
N
I
T
Capillary TubeRefrigerant control
SCROLL ZR45KC-TDFCompressor type & model
Axialx2Fan type & qty.
1125RPMFan speeds
4150m³/hr
2440CFM
Airflow (std. conditions)
57/65dBANoise Pressure*/ Noise Power
900mmWDimensions
340mmD
970mmH
95KgWeight
1020x985x406mmPacking dimensions
2unitsStacking height
6unitsUnits per palet
R22Refrigerant
Charge for 7.5 meter pipes length
O
U
T
D
O
O
R
U
N
I
T
16mmCondensate drain tube I.D
3/8”in.liquid
3/4”in.suction
25mheight differenceConnection between units
50mtubing length
T
U
B
E
S
LCD Remote ControlOperation control type
2x1500WHeating elements
8”,10”,12”Ducts Crankcase heater 33W,3PH ProtectorOthers
A
C
C.
* Noise pressure tested at 1m distance from unit
** Noise power for ducted units measured at air outlet side
Grams 2650

2-7
PRODUCT DATA SHEET
Revision Y05-01Service Manual - DNC Series
DNC 1155 R407C
Model
Ceiling Mounted
Installation method
HeatingCoolingUnits
Characteristic 3800035000Btu/hr 1110010300W
Capacity
39853950WTotal input
2.762.6W/WCOP 230V/50Hz/1Power supply (voltage, cycle,No of phases) 17.317.2ARated current
25ACircuit breaker rating
Plug Fan x 1Fan type & qty.
500550700RPMFan speed (HI-M-LO)
120013301700m³/hr 7057801000CFM Airflow (LO-M-HI)
20-80PaStatic Pressure
54.85657.2dBANoise Power**
47.549.751.8dBANoise Pressure*
3.5l/hDehumidification
16mmCondensate drain tube I.D
1025mmWDimensions
760mmD
300mmH
44KgWeight 1125x975x360(Unit)+1180x870x180(Frame)mmPackage dimensions
7unitsStacking height
7unitsUnits per palet
I
N
D
O
O
R
U
N
I
T
Capillary TubeRefrigerant control
SCROLL ZR47KCE-PFJCompressor type & model
Axialx2Fan type & qty.
1125RPMFan speeds
4150m³/hr
2440CFM
Airflow (std. conditions)
57/65dBANoise Pressure*/ Noise Power
900mmWDimensions
340mmD
970mmH
95KgWeight
1020x985x406mmPacking dimensions
2unitsStacking height
6unitsUnits per palet
R407CRefrigerant
Charge for 7.5 meter pipes length
O
U
T
D
O
O
R
U
N
I
T
16mmCondensate drain tube I.D
3/8”in.liquid
3/4”in.suction
25mheight differenceConnection between units
50mtubing length
T
U
B
E
S
LCD Remote ControlOperation control type
2x1500WHeating elements
8”,10”,12”Ducts Crankcase heater 33WOthers
A
C
C.
* Noise pressure tested at 1m distance from unit
** Noise power for ducted units measured at air outlet side
Grams 2400

2-8
PRODUCT DATA SHEET
Revision Y05-01 Service Manual - DNC Series
DNrtDNC 1155-3PH R407C15hgddffgtd
f
Model
Ceiling Mounted
Installation method
HeatingCoolingUnits
Characteristic 3790035500Btu/hr 1110010400W
Capacity
39403850WTotal input
3.822.7W/WCOP 400V/50Hz/3Power supply (voltage, cycle,No of phases) 3x10.43x10.1ARated current
3x16ACircuit breaker rating
Plug Fan x 1Fan type & qty.
500550700RPMFan speed (HI-M-LO)
120013301700m³/hr 7057801000CFM Airflow (LO-M-HI)
20-80PaStatic Pressure
54.85657.2dBANoise Power**
47.549.751.8dBANoise Pressure*
3.5l/hDehumidification
16mmCondensate drain tube I.D
1025mmWDimensions
760mmD
300mmH
44KgWeight 1125x975x360(Unit)+1180x870x180(Frame)mmPackage dimensions
7unitsStacking height
7unitsUnits per palet
I
N
D
O
O
R
U
N
I
T
Capillary TubeRefrigerant control
SCROLL ZR47K3E-TDFCompressor type & model
Axialx2Fan type & qty.
1125RPMFan speeds
4150m³/hr
2440CFM
Airflow (std. conditions)
57/65dBANoise Pressure*/ Noise Power
900mmWDimensions
340mmD
970mmH
95KgWeight
1020x985x406mmPacking dimensions
2unitsStacking height
6unitsUnits per palet
R407CRefrigerant
Charge for 7.5 meter pipes length
O
U
T
D
O
O
R
U
N
I
T
16mmCondensate drain tube I.D
3/8”in.liquid
3/4”in.suction
25mheight differenceConnection between units
50mtubing length
T
U
B
E
S
LCD Remote ControlOperation control type
2x1500WHeating elements
8”,10”,12”Ducts Crankcase heater 33W,3PH ProtectorOthers
A
C
C.
* Noise pressure tested at 1m distance from unit
** Noise power for ducted units measured at air outlet side
Grams 2800

2-9
PRODUCT DATA SHEET
Revision Y05-01Service Manual - DNC Series
DNC 1255
Model
Ceiling Mounted
Installation method
HeatingCoolingUnits
Characteristic
4470042500Btu/hr
1309612460W
Capacity
39704390WTotal input
3.32.84W/WCOP
400V/50Hz/3Power supply (voltage, cycle, No of phases)
3 x 10.43 x 11.6ARated current
3 x 16ACircuit breaker rating
Plug Fan x 1Fan type & qty.
500550830RPMFan speed (HI-M-LO)
123013502000m³/hr 7207951176CFM Airflow (HI-M-LO)
20-80PaStatic Pressure
54.85659.3dBANoise Power** (HI-M-LO)
47.549.753.3dBANoise Pressure* (HI-M-LO)
4.7l/hDehumidification
16mmCondensate drain tube I.D
1025mmWDimensions
760mmD
300mmH
44KgWeight 1125x975x360(Unit)+1180x870x180(Frame)mmPackage dimensions
7unitsStacking height
7unitsUnits per palet
I
N
D
O
O
R
U
N
I
T
Capillary TubeRefrigerant control
SCROLL ZR54Compressor type & model
Axial x 2Fan type & qty.
1125RPMFan speeds
4150m³/hr
2440CFM
Airflow (std. conditions)
57/65dBANoise Pressure*/ Noise Power
900mmWDimensions
350mmD
970mmH
95KgWeight
1020x985x406mmPacking dimensions
2unitsStacking height
6unitsUnits per palet
R22Refrigerant
Charge for 7.5 meter pipes length
O
U
T
D
O
O
R
U
N
I
T
16mmCondensate drain tube I.D
3/8”in.liquid
3/4”in.suction
25mheight differenceConnection between units
50mtubing length
T
U
B
E
S
LCD Remote ControlOperation control type
2x1500WHeating elements
8”,10”,12”Ducts Crankcase heater 60W,3PH ProtectorOthers
A
C
C.
* Noise pressure tested at 1m distance from unit
** Noise power for ducted units measured at air outlet side
Grams 2660

2-10
PRODUCT DATA SHEET
Revision Y05-01 Service Manual - DNC Series
DNC 1255-3PH R 407C
Model
Ceiling Mounted
Installation method
HeatingCoolingUnits
Characteristic
4950043000Btu/hr
1450012600W
Capacity
51805185WTotal input
2.802.43W/WCOP
400V/50Hz/3Power supply (voltage, cycle, No of phases)
3 x 13.63 x 13.6ARated current
3 x 16ACircuit breaker rating
Plug Fan x 1Fan type & qty.
500550830RPMFan speed (HI-M-LO)
123013502000m³/hr 7207951176CFM Airflow (HI-M-LO)
20-80PaStatic Pressure
54.85659.3dBANoise Power** (HI-M-LO)
47.549.753.3dBANoise Pressure* (HI-M-LO)
4.7l/hDehumidification
16mmCondensate drain tube I.D
1025mmWDimensions
760mmD
300mmH
44KgWeight 1125x975x360(Unit)+1180x870x180(Frame)mmPackage dimensions
7unitsStacking height
7unitsUnits per palet
I
N
D
O
O
R
U
N
I
T
Capillary TubeRefrigerant control
SCROLL HR61YACompressor type & model
Axial x 2Fan type & qty.
1125RPMFan speeds
4150m³/hr
2440CFM
Airflow (std. conditions)
62/69dBANoise Pressure*/ Noise Power
900mmWDimensions
350mmD
970mmH
95KgWeight
1020x985x406mmPacking dimensions
2unitsStacking height
6unitsUnits per palet
R407cRefrigerant
Charge for 7.5 meter pipes length
O
U
T
D
O
O
R
U
N
I
T
16mmCondensate drain tube I.D
3/8”in.liquid
3/4”in.suction
25mheight differenceConnection between units
50mtubing length
T
U
B
E
S
LCD Remote ControlOperation control type
2x1500WHeating elements
8”,10”,12”Ducts Crankcase heater 60W,3PH ProtectorOthers
A
C
C.
* Noise pressure tested at 1m distance from unit
** Noise power for ducted units measured at air outlet side
Grams 3900

3-1
RATING CONDITIONS
Revision Y05-01Service Manual - DNC Series
3. RATING CONDITIONS
NOTES:
1. Rating conditions ISO/CD 13253R
Cooling: indoor: 27°C (80°F) DB 19°C (66°F) WB
Outdoor: 35°C (95°F) DB
Heating: indoor: 20°C (68°F) DB
Outdoor: 7°C (45°F) DB 6°C (43°F) WB
Refrigerant tubing length (one way) 7.5m (24.6 ft)
2. Guaranteed operating range:
Indoor Outdoor
Upper limit 32°C DB, 23°C WB 46°C DB
Cooling Lower limit 21°C DB, 15°C WB 21°C DB
Upper limit 27°C DB 24°C DB, 18°C WB
Heating Lower limit 20°C DB -9°C DB, -10°C WB
1 PH 198 – 242 V
Voltage 3 PH 360 – 440 V

4-1
OUTLINE DIMENSIONS
Revision Y05-01Service Manual - DNC Series
4. OUTLINE DIMENSIONS
4.1 Indoor Unit: DNC 35 (955)
4.2 Indoor Unit: DNC 38 (1155), DNC 44 (1255)

4-2
OUTLINE DIMENSIONS
Revision Y05-01 Service Manual - DNC Series
4.3 Outdoor Unit: OU8-33
4.4 Outdoor Unit: OU10-38, OU10-44, OU10-50

5-1
PERFORMANCE DATA & PRESSURE CURVES
Revision Y05-01Service Manual - DNC Series
DNC 955 - R22 COOLING CAPACITY
7,000
8,000
9,000
10,000
11,000
12,000
13,000
10 15 20 25 30 35 40 45
Outdoor Temp. (C DB)
CAPACITY [W)
30 C DB/50%RH
27 C DB/50%RH
23 C DB/50%RH
Indoor Temp.
DNC 955T - R22 HEATING CAPACITY
6,000
7,000
8,000
9,000
10,000
11,000
12,000
-10 -5 0 5 10 15
Outdoor Temp. (C DB)
CAPACITY [W)
20 C DB
18 C DB
15 C DB
5. PERFORMANCE DATA & PRESSURE CURVES

5-2
PERFORMANCE DATA & PRESSURE CURVES
Revision Y05-01 Service Manual - DNC Series
DNC 955 - R22 COOLING TOTAL INPUT
1,500
2,000
2,500
3,000
3,500
4,000
4,500
10 15 20 25 30 35 40 45
Outdoor Temp. (C DB)
TOTAL INPUT (W)
30 C DB/50%RH
27 C DB/50%RH
23 C W B /50% RH
Indoor Temp.
DNC 955T - R22 HEATING TOTAL INPUT
1,500
1,700
1,900
2,100
2,300
2,500
2,700
2,900
3,100
3,300
3,500
-10 -5 0 5 10 15
Outdoor Temp. (C DB)
TOTAL INPUT (W
)
20 C DB
18 C DB
15 C DB