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Hitachi Primairy Series, Installation & Maintenance Manual, Page: 22 / 24

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Hitachi Primairy Series Installation & Maintenance Manual Download Page 22

  

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Test run

Test run should be performed after refrigerant piping, drain, wiring, etc. have been finished.

!

 CAUTION

The air conditioner is provided with a crankcase heater, check to ensure that the switch on the main power source has been ON for 

more than 6 hours ahead of power on preheating, otherwise it might damage the compressor!

Do not operate the system until all the check points have been cleared.

a. 

Check to ensure that the stop valves of the outdoor unit are fully opened.

b. 

Check to ensure that the electric wires have been fully connected.

c. 

Check to ensure that the electrical resistance is more than 2MΩ, by measuring the resistance between ground and the 
terminal of the electrical parts. If not, do not operate the system until the electrical leakage is 

found and repaired.

Test run function identification

Operate remote controller to turn ON the appliance, and then proceed test run.
Pay attention to the following items while the system is running.
Do not touch any of the parts by hand at the discharge gas side, since the compressor chamber and the pipes at the discharge side 

are heated higher than 90ºC.

•  Turn off the power after test run is finished.

Installation of the appliance is generally finished after the above operations are done. If you still have any trouble, please contact 

local technical service center of our company for further information.

INSTALLATION INSTRUCTIONS

HO2019292HA

18

Summary of Contents for Primairy Series

Page 1: ...HO2019292HA OUTDOOR UNITS RAS 3 0UFESNH1 RAS 3 5UFESNH1 RAS 4 0UFESNH1 RAS 5 0UFESMH1 RAS 6 0UFESMH1 RAS 6 5UFESMH1 LARGE SINGLE SPLIT DC INVERTER SERIES ...

Page 2: ......

Page 3: ...rated within this range Mode Outdoor operation temperature range ºC Maximum Minimum Cooling operation 48 15 Heating operation 24 15 Storage condition Temperature 25 60ºC Humidity 30 80 The numbers in the model represent the cooling capacity HP For example 3 0HP represents RAS 3 0UFESNH1 ...

Page 4: ...ectrical wiring diagram 9 Installation instructions 10 Transportation and handling before installation 10 Installation locations selection 10 Drainage elbow and drain hose installation 11 Outdoor unit installation 11 Refrigerant piping 12 Wiring 16 Test run 18 ...

Page 5: ... electrician All the electric works must be performed in accordance with national wiring regulations and local electrical codes Use the specified type of wire for electrical connections safely Firmly clamp the interconnecting wires so that their terminals receive no external stresses For wiring use a cable long enough to cover the entire distance with no connection and don t connect multiple devic...

Page 6: ...placed by the factory or its service department to avoid danger Servicing shall only be performed as recommended by the equipment manufacturer Maintenance and repair requiring the assistance of other skilled personnel shall be carried out under the supervision of the person competent in the use of flammable refrigerants Means for disconnection which can provide full disconnection in all poles must...

Page 7: ...The maximum number of pieces of equipment permitted to be stored together will be determined by local regulations 6 Information on servicing 6 1 Checking the area Prior to beginning work on systems containing flammable refrigerants safety checks are necessary to ensure that the risk of ignition is minimised To repair the refrigerating system the following precautions should be complied with prior ...

Page 8: ...uitably protected against being so corroded 6 9 Checking electrical devices Repair and maintenance to electrical components shall include initial safety checks and component inspection procedures If a fault exists that could compromise safety then no electrical supply shall be connected to the circuit until it is satisfactorily solved If the fault cannot be corrected immediately but it is necessar...

Page 9: ...ak detection fluids are suitable for use with most refrigerants but the use of detergents containing chlorine shall be avoided as the chlorine may react with the refrigerant and corrode the copper pipe work If a leak is suspected all naked flames shall be removed extinguished If a leakage of refrigerant is found which requires brazing is found all of the refrigerant shall be recovered from the sys...

Page 10: ...um is not possible use the manifolds so that refrigerant can be removed from various parts of the system f Make sure that cylinder is situated on the scales before recovery takes place g Start the recovery machine and operate in accordance with manufacturer s instructions h Do not overfill cylinders No more than 80 volume liquid charge i Do not exceed the maximum working pressure of the cylinder e...

Page 11: ...t might get them wet and may cause damage or malfunction of your property Do not use means to accelerate the defrosting process or to clean other than those recommended by the manufacturer The appliance shall be stored in a room without continuously operating ignition sources for example open flames an operating gas appliance or an operating electric heater Do not pierce or burn Be aware that refr...

Page 12: ...n external ignition source there is a risk of fire CAUTION This symbol shows that the operation manual should be read carefully CAUTION This symbol shows that a service personnel should handle this equipment with reference to the installation manual CAUTION This symbol shows that information is available such as the operating manual or installation manual SAFETY PRECAUTIONS HO2019292HA 8 ...

Page 13: ...ng Service valve Heating cycle Cooling cycle Electrical wiring diagram 4 SI 4 SI 1 L 1 L 2 N 2 N N L Outdoor unit Terminals Indoor unit Terminals Transmission cable Power supply 4 SI 4 SI 1 L 1 L 2 N 2 N N W U V Outdoor unit Terminals Indoor unit Terminals Transmission cable Power supply 3 0 3 5 4 0HP 5 0 6 0 6 5HP REFRIGERANT FLOW DIAGRAM HO2019292HA 9 EN ...

Page 14: ...is at least 3m away from the antenna of TV set or radio An amplifier may be required for the affected device Install the unit horizontally Please install it in an area not affected by snowfall or blowing snow In areas with heavy snow please install a canopy a pedestal and or some baffle boards CAUTION Avoid the following places for installation where air conditioner trouble is liable to occur Wher...

Page 15: ... the outdoor unit with the foundation bolts the fasten holes position is shown at the Fig 1 3 Fasten the outdoor unit as the Fig 2 4 Make sure to fasten the outdoor unit tight and horizontal to prevent noise when the machine is oblique or inclined by strong breeze or earthquake 5 Do not drain off water to public places to avoid to skidding 6 A strong base made of concrete etc should be made The ap...

Page 16: ... trap When the indoor unit is lower than outdoor unit and height is larger than 5m set an oil trap every 5m height difference on suction piping NOTE To avoid storing too much oil in the oil trap the oil trap should be as short as possible The horizontal piping should be slope down along the refrigerant flow direction to bring the oil back to compressor the slope is about 1 200 to1 250 In order to ...

Page 17: ...g nut on Remove flare nuts attached to indoor and outdoor units then put them on burrs removed pipe Not possible to put them on after flaring work Flare nut for pipe depends on the diameter of pipe 4 Flaring work Perform flaring work with flaring tool as shown below 5 Check Compare the flared work with the figure below If flare is noted to be defective cut off the flared section and perform flarin...

Page 18: ...outdoor unit side surely insulate every piping including valves Cover piping joints with pipe cover Using piping tape apply taping starting from the entry of outdoor unit Fix the end of piping tape with adhesive tape When piping has to be arranged through above ceiling closet or area where temperature and humidity are high use wind additional commercially sold insulation for prevention of condensa...

Page 19: ...onia NH3 in the reaction Fig 9 2 Indoor unit Pressure gauge Outdoor unit Manifold valve Charge hose for R32 Vacuum pump CAUTION An excess or a shortage of refrigerant is the main cause of trouble to the unit Charge the correct quantity of refrigerant according to the description in the manual Check refrigerant leakage in detail If a large refrigerant leakage occurs it will cause difficulty in brea...

Page 20: ...Nm M6 4 0 to 5 0 Nm M8 9 0 to 11 0 Nm M10 18 0 to 23 0 Nm Keep the above tightening torque during wiring work CAUTION Use tape material to wrap the wire and seal wiring holes to prevent the condensed water and insects Tightly secure the power source wiring by using the cord clamp inside the unit NOTE Fix the rubber bushes with adhesive when conduit tubes to the outdoor unit are not used General Ch...

Page 21: ...han 15 meters a larger wire size should be selected 5 Install main switch and ELB for each system separately Select the high response type ELB that is acted within 0 1second 6 In the case that power cables are connected in series add each unit maximum current and select wires below Selection According to EN60335 1 Current i A Wire Size mm2 i 6 0 75 6 i 10 1 10 i 16 1 5 16 i 25 2 5 25 i 32 4 32 i 4...

Page 22: ...than 2MΩ by measuring the resistance between ground and the terminal of the electrical parts If not do not operate the system until the electrical leakage is found and repaired Test run function identification Operate remote controller to turn ON the appliance and then proceed test run Pay attention to the following items while the system is running Do not touch any of the parts by hand at the dis...

Page 23: ......

Page 24: ...sources To return your used device please use the return and collection systems or contact the retailer where the product was purchased They can take this product for environmental safe recycling Specifications in this document are subject to change without notice in order that Hitachi Johnson Controls Air Conditioning Inc may bring the latest innovations to their customers Hitachi Johnson Control...

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