Airwell DNC 955 User manual

CENTRAL AIR CONDITIONER
SPLIT SYSTEM
WITH ELECTRONIC CONTROL
SERIES DNC
INSTALLATION INSTRUCTIONS
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Table of Contents
1. List of accessories provided with the air-conditioner .................................................................. 1
2. General ....................................................................................................................................... 2
2.1 Indoor unit dimensions DNC - all types ......................................................................................3
2.2 Outdoor unit dimensions DNC 955 , DNC 1150..................................................................... 4
2.3 Outdoor unit dimensions: DNC 1255 ......................................................................................... 5
3. Considerations for choosing installation location........................................................................ 6
3.1 Relative positioning between units ............................................................................................. 6
3.2 Considerations in selecting location for installing the outdoor unit ............................................. 6
3.3 Considerations in selecting location for installing the indoor unit ............................................... 7
4. Installation of the indoor unit....................................................................................................... 8
4.1 Hanging the indoor unit............................................................................................................... 9
4.2 Installing DNC return air panel.................................................................................................. 11
4.3 Fresh air supply (optional) ........................................................................................................ 12
4.4 Connecting the drainage tube................................................................................................... 13
5. Installation of flexible ducts....................................................................................................... 14
5.1 Installation instructions ............................................................................................................. 14
6. Installation of the outdoor unit................................................................................................... 16
6.1 Installation on a concrete slab .................................................................................................. 16
6.2 Installation on the wall .............................................................................................................. 16
7. Installation of interconnecting tubing between indoor and outdoor units .................................. 17
7.1 General ..................................................................................................................................... 17
7.2 Gas tubes ................................................................................................................................. 17
7.3 Relative positioning of the indoor and outdoor units................................................................. 18
7.4 Insulating the gas tubes............................................................................................................ 20
7.5 Preparing the flare and connecting the tubes between units.................................................... 20
8. Preparing the air-conditioner for operation ............................................................................... 21
8.1 Performing vacuum in the indoor unit and in tubes .................................................................. 21
8.2 Tightening nuts ......................................................................................................................... 23
9. Electrical and tubes installation ................................................................................................ 24
9.1 1PH units .................................................................................................................................. 25
9.2 3PH units .................................................................................................................................. 25
10. Remote control ......................................................................................................................... 26
11. Tests upon completing installation............................................................................................ 26
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1. List of accessories provided with the air-conditioner
Description Amount Name Use
1 Technician’s installation
manual Installation instructions
Instruction manual for
remote control
Operation instructions for remote
control
1 Instruction manual for the
user Operation instructions
1 Remote control including
batteries Operating the air-conditioner
1 Remote control bracket Hanging the remote control on the
wall
1 Central control display Operating and main working regime
display
2 Carbon filter Air cleaning
4 Rubber mounting pads Padding of the outdoor unit
4 Tie - Wraps Tightening the indoor and the outdoor
units electrical cables
4 Washer for hanging the
indoor unit
Securing the location of the pole in
the ear on which the unit is hanging
1 Mounting plate Hanging the unit
2 Hanging tracks Hanging the unit
6 Machine screws for
hanging tracks Installing hanging tracks
6 Spring washer for
hanging tracks Installing hanging tracks
6 Screws for installing
adapters Securing installment of adapters
4 10” adapter screws Installing 10” adapters
4
4
4
Dibbles
Screws
Washers
Installing bracket for remote control
and central control display
4 8” adapter
Mounting a flexible 8” diameter duct
1 12” adapter Mounting a flexible 12” diameter duct
1 10” adapter Mounting a flexible 10” diameter duct
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2. General
Only a professional technician, who went through an appropriate training by the company, may
install the air-conditioner. Installation must comply with the Company’s specs, according to the law
of electricity, while using the Company’s standard components such as tubes, ducts, electric power
cables and other necessary accessories.
Installation instructions relate to DNC air-conditioners that are comprised of two components: the
indoor unit and the outdoor unit. The two units are interconnected between them by two refrigerant
tubes, electric power cable and a control cable.
Hereby are recommendations to perform a correct installation of DNC air-conditioners:
xThermal load assessment for the structure must be carried - out.
xShort refrigerant tubes with minimal bending.
xCapacity loss of 0.3% for each meter of tubing - beyond the first 7 meters, must take into
account.
xEnsure free flow of return air from the air-conditioned area into the return air grille, as well
as from the return air grille to the inlet of the indoor unit. This route must be free of
obstruction and must not pass through non air-conditioned areas.
xUse only the supplied distribution flaps and return air grilles of correct sizes, according to
the Company’s recommendations.
xIn systems with connecting ducts:
- Use deep adapters only (220 mm - at least) to connect air supply grilles and flaps.
Attention!
Below are listed frequent installation problems. It is highly recommended to relate to them before
planning and performing the installation, in order to prevent them.
A. Lack of appropriate openings for returning air. Returning air via an open door is a bad
solution!
B. Openings and passages to non-air-conditioned floors, or even to places open outdoor
air.
C. Incorrect allocation of air quantities among rooms.
D. Using incorrect air supply grilles - there is no possibility to direct the distribution of air as
required.
E. De-icing of the thermostat is inactive - no telephone line was installed between the
outdoor and the indoor units.
F. Lack of fresh air in a public place.
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2.1 Indoor unit dimensions DNC - all types
1. Suction tube connector (flared)
2. Liquid tube connector (flared)
3. Pump outlet 16 mm
4. Drain pool plug (for servicing purposes only)
5. 8” air supply opening
6. Hanging bracket
7. Electrical box
8. Fresh air opening
Fig. 1. General dimensions of DNC indoor unit
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2.2 Outdoor unit dimensions DNC 955, DNC 1150
Fig. 2. General dimensions of DNC 955, DNC 1150 outdoor unit
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2.3 Outdoor unit dimensions: DNC 1255
1. Wiring connections
2. Suction tube connector (flared)
3. Liquid tube connector (flared)
4. Service valves
5. Service taps
6. Air inlet
7. Air outlet
Fig. 3. General dimensions of DNC 1255 outdoor units
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3. Considerations for choosing installation location
3.1 Relative positioning between units
The outdoor unit must be installed as close as possible to the indoor unit, in order not to harm
capacity. For determining the maximal distance allowed between them, see table No. 1 in
paragraph 7.2. In case where there is a necessity to exceed that distance over described in table 1
- the Company’s representative must be consulted.
3.2 Considerations in selecting location for installing the outdoor unit
xConvenient access option for service technician for handling the outdoor unit, as well as
free airflow.
xPreventing direct sun radiation on the coil.
xOutdoor unit location will not disturb neighbors and the user.
xThe outdoor unit will be located at the distance of at least 200 mm from the wall.
xIn installation in enclosed space (porch, laundry room etc.), make sure there are sufficient
ventilation openings ensuring release of hot air outside and preventing its return into the
outdoor unit.
xIn case of installing the outdoor units in a group, make sure that the hot air exiting from
one outdoor unit will not flow into another.
xThe outdoor unit must be installed on the wall by means of a special suspension that was
hot - galvanized, or to put it on the floor or a platform, best installed at a height of not less
than 100 mm.
xMake sure that the wall, on which the outdoor unit is installed, has a thickness of at least
200 mm, and has the capacity to carry the unit’s weight. Abstain from mounting on a
flimsy structure that might be subject to rattles and resonance.
xWhen the outdoor unit is installed on a level lower than the indoor unit, make sure the
height difference between the units is according to the explanation that appears in table
No. 1, paragraph 7.
xWhen the outdoor unit is installed above the level of the indoor unit, an oil trap must be
incorporated into the suction line, every 5 meters of elevation.
xWhen installing the outdoor unit on a second floor, on a porch, or on a higher floor, make
sure that the level of the outdoor unit upper casing is at the height of the railing. Still, if the
outdoor unit was installed lower - take care that it is installed in such way to enable easy
access and the possibility to remove the outdoor unit cover, during service operation.
xWhen the outdoor unit is installed in a place that has no free access - longer than regular
tubes must be installed. These longer tubes must include a number of loops that will
enable moving the unit during service operation.
xConsider the possibility of water dripping, during heating operation; if this dripping may
disturb the neighbors, one must take care of drainage.
xAbstain from hanging the outdoor unit on bedroom walls.
xOutdoor unit must not be installed in places, to which access requires stepping on light
roofs such as shingles and asbestos. No service shall ever be provided to outdoor units
installed in such a manner.
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3.3 Considerations in selecting location for installing the indoor unit
xEnable maximal air dispersion, to the largest possible distance, within space that must be
air - conditioned.
xEnable free passage for the return air.
xEnsure appropriate drainage of condensing water, which may be created within the unit.
xMake sure that the roof is strong enough to carry the weight of the unit.
xThe unit must not be installed in an environment exposed to oil vapors or to other
flammable materials.
xEither, the unit, and the remote control, must be installed at a distance of at least 3 m from
any source of electromagnetic field.
xTo ensure good performance in heating operation - the indoor unit must not be installed
with its lower surface higher than 4 meters from the floor.
xIn case of too high ceilings, the Company must be consulted.
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4. Installation of the indoor unit
There are two typical indoor unit installations:
A. Installing the unit with DNC return air panel, and lowering the ceiling to the unit’s height.
1. Lowered ceiling
2. Return air panel frame
3. Filter access panel
Fig. 4. Installing the unit with DNC return air panel
B. Installing the unit with service panel and conventional return air grille and lowering the
ceiling to the distance of 80 mm, at least, below the unit.
1. Lowered ceiling
2. Service panel including acoustic isolation
3. Conventional return air grille
Fig. 5. Installing the unit with service panel and conventional return air grille
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