IMPORTANT: In applications where the REFNET kits are installed in an environment requiring fire-rated materials to be used, it is necessary for the installer to obtain from a third party supplier and to utilize, for insulation, fire-rated materials that meet all applicable building codes and other requirements.
The factory-provided insulation that is supplied with the REFNET kit should be discarded in a manner meeting all applicatble laws. The following materials should be used for all refrigerant piping.
Use the insulator included in the kit to insulate the header. Joints between insulators included in the kit and those already applied to the field piping should be sealed with the tape which is also included in each kit. Any cap pipes should also be insulated using the insulator provided with each kit and then taped as described above. In case of install this kit observe follow conditions. Install the joint horizontally so that the caution label attached to joint comes to the top.
Do not bend the field piping within this range. Installation 5. After completing the installation, make sure that the unit operates properly during the startup operation. Instruct the customer on how to operate and maintain the unit. Inform customers that they should store this Installation Manual with the Operation Manual for future reference. Always use a licensed installer or contractor to install this product. Improper installation can result in water or refrigerant leakage, electrical shock, fire, or explosion.
Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. It may also be used to alert against unsafe practices.
Indicates situations that may result in equipment or property-damage accidents only. A massive leak can lead to oxygen depletion, especially in basements, and an asphyxiation hazard could occur leading to serious injury or death.
Additionally, grounding to gas pipes could cause a gas leak and potential explosion causing severe injury or death. Refrigerant gas may produce toxic gas if it comes into contact with fire. Exposure to this gas could cause severe injury or death. Packing materials such as nails and other metal or wood parts, including plastic packing materials used for transportation may cause injuries or death by suffocation. Installation must be done in accordance with this installation manual.
Improper installation may result in water leakage, electric shock, or fire. Excessive refrigerant leaks, in the event of an accident in a closed ambient space, can lead to oxygen deficiency.
Failure to use specified parts may result in water leakage, electric shocks, fire, or the unit falling. A foundation of insufficient strength may result in the unit falling and causing injuries. Improper installation may result in the unit falling and causing accidents. An insufficient power supply capacity or improper electrical construction may lead to electric shocks or fire.
Improper connections or installation may result in fire. Improper positioning of the terminal box lid may result in electric shocks, fire, or the terminals overheating.
Any presence of air or other foreign substance in the refrigerant circuit can cause an abnormal pressure rise or rupture, resulting in injury. If the pressure switch, thermal switch, or other protection device is shorted and operated forcibly, or 3PR Touching a switch with wet fingers can cause electric shock. Your hands may suffer burns or frostbite if you touch the refrigerant pipes.
To avoid injury, give the pipes time to return to normal temperature or, if you must touch them, be sure to wear proper gloves. Improper drain piping may result in water leakage and property damage. Always wait for at least 5 minutes before turning off the power. Otherwise, water leakage may occur. Using a charging cylinder may cause the refrigerant to deteriorate. RA can contribute to the greenhouse effect if it is released. Therefore take proper measures to check for the tightness of the refrigerant piping installation.
Read the chapter Refrigerant Piping and follow the procedures. If the refrigerant is charged in a state of gas, its composition can change and the system will not work properly. See the catalog for indoor models that can be connected. Normal operation is not possible when connected to other units. Install the indoor unit far away from fluorescent lamps as much as possible.
Outdoor units can be installed either outdoors or indoors. This unit is for indoor use. Plastic parts may deteriorate and fall off or result in water leakage. Corroding copper pipes or soldered parts may result in refrigerant leakage. Electromagnetic waves may disturb the operation of the control system and cause the unit to malfunction.
Operating the unit in such conditions can cause a fire. Small animals making contact with electrical parts can cause malfunctions, smoke, or fire. Instruct the customer to keep the area around the unit clean. Depending on the radio waves, a distance of 3.
Clean and dry Foreign materials including mineral oils such as SUNISO oil or moisture should be prevented from getting mixed into the system. Tight Take care to keep the system tight when installing. RA can contribute slightly to the greenhouse effect if it is released. If the refrigerant is charged in a state of gas, its composition changes and the system will not work properly. To learn which indoor units are compatible with RA, refer to the product catalogs.
To combine with other refrigerant indoor unit will cause malfunction. See the capacity table in the Engineering Data Book for details. The storage location of the accessories is shown in figure 1. NOTE Do not throw away any of the accessories until installation is complete.
They are needed for installation work. Clamps, Manuals, etc. Accessory pipes Option accessory To install the outdoor units, the following optional parts are also required. Select the location of the unit in such a way that neither the discharged air nor the sound generated by the unit disturb anyone. The foundation is strong enough to support the weight of the unit and the floor is flat to prevent vibration and noise generation.
The piping length between the outdoor unit and the indoor unit may not exceed the allowable piping length. If necessary, install some kind of obstruction to block the wind.
The space around the unit is adequate for servicing and the minimum space for air inlet and air outlet is available. Refer to figure 2 1. Front side 2. No limit to wall height 3. Service space of front side 4. A massive leak could lead to oxygen depletion, especially in basements, and an asphyxiation hazard could occur leading to serious injury or death. NOTE 1. An inverter air conditioner may cause electronic noise generated from AM broadcasting. Examine where to install the main air conditioner and electric wires, keeping proper distances away from stereo equipment, personal computers, etc.
Particularly for locations with weak reception, ensure there is a distance of at least 10 ft for indoor remote controllers, place power wiring and transmission wiring in conduits, and ground the conduits. Refer to figure 3 1. Indoor unit 2. Branch switch, overcurrent breaker 3. Remote controller 4. Personal computer or radio 2. When installing in locations where there is heavy snowfall, implement the following snow measures.
Fragile, handle the unit with care. Keep the unit upright in order to avoid compressor damage. Decide on the transportation route. If a forklift is to be used, pass the forklift arms through the large openings on the bottom of the unit. Clamp 3 Clamp 1 9 pcs. Vinyl tube 2 pcs. Conduit mounting plate Quantity Name Manuals, etc. If hanging the unit, use a cloth sling to prevent damaging the unit.
Keeping the following points in mind, hang the unit following the procedure shown in figure 5. After installation, remove the transportation brackets yellow attached to the large openings.
Refer to figure 4 Refer to figure 4 1. Packaging material 2. Forklift 3. Removal of shipping brackets 4. Shipping bracket Remove the brackets by pushing the hook. Refer to figure 5 1. Belt sling 2. Wear plate 5. If protective rubber is to be attached, attach it to the whole face of the base. Use four commercially available Mtype foundation bolts, nuts, and washers.
Refer to figure 6 1. Independent base four corner type 2. Independent base with center support type 3. Beam base Horizontal 4. Beam base Vertical 5. Center of the product Refer to figure 7 1. Depth of product 3. Inner dimension of the base 4. Drain water is sometimes discharged from the outdoor unit when it is running.
If the paint on nut connections comes off, the anti-corrosion effect may decrease. Flux has extremely negative effect on refrigerant piping systems. For instance, if the chlorine based flux is used, it will cause pipe corrosion or, in particular, if the flux contains fluorine, it will damage the refrigerant oil.
Foreign materials inside pipes including oils for fabrication must be 0. Thickness : Select a thickness for the refrigerant piping which complies with national and local laws.
NOTE Exercise special caution to prevent dirt or dust when passing piping through holes in walls and when passing pipe edges to the exterior. Refer to figure 8 Brazing without performing nitrogen permutation or nitrogen blow into the piping will create large quantities of oxidized film on the inside of the pipes, adversely affecting valves and compressors in the refrigerating system and preventing normal operation.
Refer to figure 8 1. Refrigerant pipe 2. Location to be brazed 3. Nitrogen 4. Taping 5. Handy valve 6. Regulator Model A in. NOTE Do not use anti-oxidants when brazing the pipe joints.
Residue can clog pipes and break equipment. Direction to bring out the pipes The local inter unit piping can be connected either forward or to the sides taken out through the bottom as shown in the figure 9. When passing out through the bottom, use the knock hole in the bottom frame.
Refer to figure 9 1. Left-side connection 2. Front connection 3. Refer to figure 10 Refer to figure 10 1. Knock hole for liquid pipe and gas pipe 2. Drill 3. Any gas remaining inside may blow off the pinch piping when you dissolve the brazing, causing damage. Refer to figure 11 1. Pinch piping 2 pieces 2. Do not remove. Pinch piping 4.
Procedure 1 : Confirm the shutoff valve is closed. Procedure 2 : Connect a charge hose to the service port of shutoff valve and remove the gas in the pinch piping. Procedure 3 : After removing the gas in the pinch piping, dissolve the brazing using a burner and remove the pinch piping. If connected to the front 2. When connected at lateral side bottom 3. Remove the shutoff valve cover to connect. Remove the knock hole on the bottom frame and route the piping under the bottom frame.
Gas side shutoff valve 6. Liquid side shutoff valve 7. Refrigerant charge port 8. Brazing 9. Liquid side accessory pipe 1 Gas side accessory pipe 1 Gas side accessory pipe 2 Liquid side accessory pipe 2 Knockout hole Punch the knock hole.
Gas side piping field supply When connected to the front 2. Liquid pipe shutoff valve 6. Gas pipe shutoff valve 7. Brazing 8. Liquid side accessory pipe 1 9. L type accessory joint Precautions when connecting piping between outdoor units The Outdoor unit multi connection piping kit sold separately is needed to connect piping between outdoor units in multi system. Refer to figure Do not install vertically.
Refer to figure Refer to figure 13 1. Warning label 2. Horizontal surface 3. Ground 5. C-arrow view 8. D-arrow view 3PR Otherwise oil may pool in the pipes. Branching the refrigerant piping Heed the restrictions below when installing the refrigerant branching kit and read the installation instruction manual with the kit. Improper installation could lead to malfunctioning or breakdown of the outdoor unit.
Refer to figure 14 1. Horizontal 2. A-arrow view 3. Horizontal surface 4. Refer to figure 15 1. Horizontal surface 2. Change to pattern 1 or pattern 2 Front connections Side bottom connections to indoor unit to indoor unit Oil remains in the unit A when system stops.
Change as shown in the figure below. Rising height : 8 in. Connect straightly Put rising to indoor unit to indoor unit If less than 80 in. If 80 in. Pipingbetweenoutdoorunitmulticonnectionpipingkitandoutdoorunit partB Choosefromthefollowingtableinaccordancewiththecapacitytype oftheoutdoorunitconnected.
Howtoselecttheoutdoorunitmulticonnectionpipingkit Thisisrequiredwhenthesystemismultioutdoorunitsystem. Foranoutdoorunitinstallation,make thesettingsinaccordancewiththe followingfigure. Pipingsize O. Itisnecessarytoincreasethepipesizeifthepipelengthbetween thefirstbranchkitandthefinalbranchkitisoverthanft. Reducersmustbeprocuredonsite Iftheincreasedpipesizeislargerthanmainpipesize,then increasethemainpipesizetothesamepipesize.
ForcalculationofTotalextensionlength,theactuallengthof abovepipesmustbedoubled. Thermistor M1C discharge R3T Thermistor suction 1 Before obtaining access to terminal devices, all supply circuits R4T Thermistor heat exchanger must be interrupted.
Use only copper wires. Thermistor subcool Do not turn on the main switch until all the wiring is completed. Connecting power wire and transmission wires Power circuit and cable requirements Let the power wire including ground wire go through the power A power circuit see table below must be provided for connection of outlet port on either the front, side or back of the outdoor unit.
For details, see the installation manual attached to the When none are available, follow the instructions below. Page Before Operation Touch a metal part by hand such as the stop valve in Service precautions order to eliminate static electricity and to protect the PCB before performing service.
Page Test Operation 3. Page Checks In Normal Operation Checks in normal operation Indoor units cannot be checked individually. The led indication changes during this operation, but In case of wired remote controllers that is not abnormal. Page Service Mode Operation Print page 1 Print document 28 pages. Rename the bookmark. Delete bookmark? Cancel Delete.
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