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For the use of a gas cylinder without siphon inside, turn it upside down and use it.
(We recommend manifold with sight glass.)
Caution
Do not use a “CHARGE CYLINDER”.
Caution
As a rule, please collect all existing refrigerants in the system outside the system when the refrigerant leakage occurs by the
system.
After that, please fill new refrigerant of a regulated amount again.
system.
After that, please fill new refrigerant of a regulated amount again.
DRY VACUUMING
• If vacuum pump possible vacuuming until less than -100.7kpa.
1. Running vacuum pump at both liquid and gas side for more than 1 hour and vacuuming until -100.7kpa.
2. After that keep the pressure -100.7kpa for 1 hour and confirm the vacuum gauge value not increasing.
3. If vacuum gauge value is increase, there is possibility of water inside the unit or there is any leakage.
10.5.3. Regarding handling
Handling the unit by hold the handle at compressor side and hold the basepan bottom at fan side.
10.5.4. Selecting the outdoor unit installation locations
• Select location which satisfies the following condition, and then confirm with the customer that such a place is satisfactory
before installing the outdoor unit.
1.
There should be sufficient ventilation.
2.
The outdoor unit should be sheltered as much as possible from rain and direct sunlight, and the air should be able to move around so
that hot and cold air do not build up.
that hot and cold air do not build up.
3.
There should not be animals or plants near the air outlet which could be
adversely affected by hot or cold air coming out from the unit.
adversely affected by hot or cold air coming out from the unit.
4.
The outlet air and operating noise should not be a nuisance to other occupants
nearby.
nearby.
5.
The location should be able to withstand the full weight and vibration of the
outdoor unit, and it should also be level and safe for the unit to be installed.
outdoor unit, and it should also be level and safe for the unit to be installed.
6.
The intake and outlet should not be covered.
7.
There should not be danger of flammable gas or corrosive gas leaks.
8.
There should be as little back-ventilation (air blowing directly onto the fan) as
possible.
(If strong wind blows directly onto the fan, it may cause problems with normal
operation.)
possible.
(If strong wind blows directly onto the fan, it may cause problems with normal
operation.)
• If you know which direction the prevailing wind comes from during the
operating season, set the outdoor unit at a right-angle to this wind direction,
or so that air outlet faces toward a wall or fence.
or so that air outlet faces toward a wall or fence.
• If there are obstructions near the outdoor unit and the wind direction is not
constant, install an optional air guider.
9.
Do not allow any obstacles near the outdoor unit which will interfere with air flow around the air intake and air outlet.
10. If installing in a location which is prone to snowfall, place the installation base as high as possible, and be sure to install a roof or
enclosure which does not allow snow to accumulate.
11. Avoid installing the unit in places where petroleum products (such as machine oil), salinity, sulphurous, gases or high-frequency noise are
present.
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12. Be sure to leave enough space around the outdoor unit to maintain proper performance and to allow access for routine maintenance.
• Allow enough space from any obstacles as shown in Fig. 1.2 below in order to prevent short-circuits from occurring.
(If installing more than one outdoor unit, make the necessary space available as outlined in 13.)
However, there should be at least 1 meter of free space above the unit.
• The height of any obstacles at the air intake and outlet sides should not be greater than the height of the outdoor unit.
13. If installing more than one outdoor unit, allow enough space around each unit as shown below.
Maintain sufficient space above the unit.
Values inside brackets indicate distances when installing the 4HP - 6HP.
• The distance given above are the minimum distance required in order to maintain proper performance.
Allow as much space as possible in order to get the best performance from the units.
10.5.5. Transporting and installing the outdoor unit
• Transporting
1. The outdoor unit should be transported in its original packaging as close to the installation location as possible.
2. If suspending the outdoor unit, use a rope or belt, and use cloth or wood as padding in order to avoid damaging the unit.
• Installation
1. Read the “Selecting the outdoor unit installation location” section thoroughly before installing the outdoor unit.
2. If installing the unit to a concrete base or other solid base, use M10 or W3/8 bolts and nuts to secure the unit, and ensure
that the unit is fully upright and level.
(The anchor bolt positions are shown in the diagram at the right side.)
In particular, install the unit at a distance from the neighbouring building which conforms to regulations specified by local
noise emission regulation standards.
noise emission regulation standards.
3. Do not install the outdoor unit to the building’s roof.
4. If there is a possibility that vibration may be transmitted to the rooms of the building, place rubber insulation between the unit
and the installation surface.
5. Drain water will be discharged from the outdoor unit when operating the system in heating or defrosting modes. Select an
installation location which will allow the water to drain away properly, or provide a drainage channel so that the water can
drain away.
drain away.
(If this is not done, the drain water may freeze during winter, or the water may spill down to areas underneath the installation
location.)
location.)
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• If a drain pipe needs to be installed, insert the accessory drain elbow into the mounting hole at the bottom of the outdoor unit,
and connect a hose with an inside diameter of 15mm to this drain elbow.
(The hose is not supplied.)
If using the drain elbow, install the outdoor unit on a base which is at least 5cm high.
NOTE
In cold regions (where the outdoor air temperature can drop to 0°C or below continuously for 2-3 days), the drain water may freeze,
and this may prevent the fan from operating. Do not use the drain elbow in such cases.
and this may prevent the fan from operating. Do not use the drain elbow in such cases.
10.5.6. Connecting the pipes
• Use a clean pipe which does not include water or dust for inside of piping.
• When cutting the refrigerant pipes, a piping cutter must be used. Before connecting the refrigerant pipes, blow nitrogen and
• When cutting the refrigerant pipes, a piping cutter must be used. Before connecting the refrigerant pipes, blow nitrogen and
blow off dust in the pipes.
(Never use tools which cause a lot of dust such as a saw and a magnet.)
• When waxing replace nitrogen inside the piping after removing dirt and dust. (In order to prevent oxidation scale from forming
inside the piping).
• The refrigerant pipes are of particular importance.
The installation work for refrigerant cycles in separate-type air conditioners must be carried out perfectly.
1. Refer to the table below for the pipe diameters equivalent lengths and indoor/outdoor unit difference of elevation.
Pipe diameter (mm)
Equivalent length (m)
Difference of elevation (m)
Liquid-side pipes
Gas-side pipes
ø9.52 x 0.8
ø15.88 x 1.0
50
30
2. Local pipes can project in any of four directions.
• Make holes in the pipe panels for the pipes to pass through.
• Be sure to install the pipe panels to prevent rain from getting inside the outdoor unit.
• Be sure to install the pipe panels to prevent rain from getting inside the outdoor unit.
[Removing the service panel].
(1)
(2)
(2)
Remove the two mounting screws.
Slide the service panel downward to release the pawls. After this, pull the
service panel toward you to remove it.
Slide the service panel downward to release the pawls. After this, pull the
service panel toward you to remove it.
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Caution
Use a material with good heat-resistant properties as the
heat insulation for the pipes. Be sure to insulate both the
gas-side and liquid-side pipes. If the pipes are not
adequately insulated, condensation or water leakages
may occur.
heat insulation for the pipes. Be sure to insulate both the
gas-side and liquid-side pipes. If the pipes are not
adequately insulated, condensation or water leakages
may occur.
Liquid-side pipes
Material that can withstand
Gas-side pipes
120°C or higher
3. Notes when connecting the refrigerant pipes.
• Use clean copper, pipes with no water or dust on the insides.
• Use phosphorus-free, unjointed copper pipes for the refrigerant pipes.
• If it is necessary to cut the refrigerant pipes, be sure to use a pipe cutter, and use compressed nitrogen or an air blower to
• Use phosphorus-free, unjointed copper pipes for the refrigerant pipes.
• If it is necessary to cut the refrigerant pipes, be sure to use a pipe cutter, and use compressed nitrogen or an air blower to
clean out any foreign particles from inside the pipe.
• Be careful not to let any dust, foreign materials or water get inside the pipes during connection.
• If bending the pipes, allow as large a bending radius as possible. Do not flex the pipes any more than necessary.
• If joining pipe ends, do so before tightening the flare nut.
• Always blow the pipe end with nitrogen while joining pipe ends.
• If bending the pipes, allow as large a bending radius as possible. Do not flex the pipes any more than necessary.
• If joining pipe ends, do so before tightening the flare nut.
• Always blow the pipe end with nitrogen while joining pipe ends.
(This will prevent any oxide scaling from occurring inside the pipe.)
• If using long pipe lengths with several joined pipe ends, insert strainers inside the pipes. (Strainers are not supplied.)
• When tightening the flare nuts, coat the flare (both inside surfaces) with a small amount of refrigerator oil, and screw in
• When tightening the flare nuts, coat the flare (both inside surfaces) with a small amount of refrigerator oil, and screw in
about 3-4 turns at first by hand.
• Refer to the following table for the tightening torques. Be sure to use two spanners to tighten.
(If the nuts are overtightened, it may cause the flares to break or leak.)
4. After piping connection has been completed, make sure that the joint areas of the indoor and outdoor units are free from gas
leakage by the use of nitrogen, etc.
5. Air purge within connection piping shall be carried out by evacuation.
6. Close the tube joining area with putty heat insulator (local supply) without any gap as shown in below figure.
(To prevent insects or small animal entering)
10.5.7. Heat insulation
10.5.8. Charging with refrigerant
• At the time of shipment from the factory, this unit is charged with enough refrigerant for an equivalent pipe length of 30m. If the
equivalent pipe length used will be 30m or less, no additional charging will be necessary.
• If the equivalent pipe length will be between 30 and 50m, charge with additional refrigerant according to the equivalent length
given in the table below.
− For standard type
Additional charging amount
Equivalent length
0.05 kg/m
50m
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