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Hitachi Set Free mini-HNRQ1 Series, Installation & Maintenance Manual, Page: 33 / 52

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Hitachi Set Free mini-HNRQ1 Series Installation & Maintenance Manual Download Page 33

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4.7  Additional Refrigerant Charge Calculation

Although this unit has been charged with refrigerant, additional refrigerant charge is required on the site. 

Determine additional quantity of refrigerant required according to the following table, and charge it into the 

system.
(1) Calculating the method of Additional Refrigerant Charge

Model

Item

Contents

Total Additional 

Charge

RAS-

3.0~6.5

HNBRKQ1

For the refrigerant 
pipes

Liquid pipe 

diameter

Symbol

Total length of 

liquid piping

(m)

Refrigerant 

charge per meter

Additional 

charge

(kg)

W=W11+W12

+W13

Φ6.35

W11=

×0.020kg/m=

Φ9.52

W12=

×0.050kg/m=

Φ12.7

W13=

×0.085kg/m=

For the Indoor units

0

RAS-

7.0~12

HNBRMQ1

For the refrigerant 
pipes

Liquid pipe 

diameter

Symbol

Total length of 

liquid piping

(m)

Refrigerant 

charge per meter

Additional 

charge

(kg)

W=W11+W12

+W13+W21
+W22+W23

Φ6.35

W11=

×0.020kg/m=

Φ9.52

W12=

×0.059kg/m=

Φ12.7

W13=

×0.120kg/m=

For the 4-Way 
cassette indoor 
units

Model

Symbol

Numbers

(Q’ty)

Refrigerant 

charge per unit

Additional 

charge

(kg)

RCI-1.0~1.5

W21=

×0.23kg/pcs=

RCI-2.0~2.5

W22=

×0.29kg/pcs=

RCI-3.0~6.5

W23=

×0.47kg/pcs=

For the other indoor 
units

0

NOTE:

Ensure the total additional charge should not be exceeded the max. additional refrigerant charge quantity.

(2) Max. Additional Refrigerant Charge Quantity

Outdoor Unit

RAS-3.0~

3.5HNBRKQ1

RAS-4.0~

5.0HNBRKQ1

RAS-6.0~

6.5HNBRKQ1

RAS-7.0~

8.0HNBRMQ1

RAS-10~

12HNBRMQ1

Max. Additional Refrigerant Charge 
Quantity (kg)

3.9

7.9

8.6

12.9

12.9

(3) Refrigerant Charge Amount of Outdoor Unit before Shipment.

Outdoor Unit

W

0

(kg)

RAS-3.0~3.5HNBRKQ1

3.0

RAS-4.0~5.0HNBRKQ1

4.1

RAS-6.0~6.5HNBRKQ1

4.4

RAS-7.0~8.0HNBRMQ1

5.5

RAS-10~12HNBRMQ1

6.5

NOTE:

W

0

 is outdoor unit refrigerant charge before shipment.

(4) Record of Additional Charge

The total refrigerant charge of the system should be calculated by the following formula:

Total of Refrigerant Charge

=

W

+

W

0

The system

=

+

=

kg

Summary of Contents for Set Free mini-HNRQ1 Series

Page 1: ...ries RAS 3 0HNBRKQ1 RAS 4 0HNBRKQ1 RAS 5 0HNBRKQ1 READ AND UNDERSTAND THIS MANUAL BEFORE USING THIS HEAT PUMP AIR CONDITIONERS KEEP THIS MANUAL FOR FUTURE REFERENCE RAS 3 5HNBRKQ1 RAS 4 5HNBRKQ1 RAS 6 0HNBRKQ1 RAS 6 5HNBRKQ1 RAS 7 0HNBRMQ1 RAS 8 0HNBRMQ1 RAS 10HNBRMQ1 RAS 11HNBRMQ1 RAS 12HNBRMQ1 Outdoor Units Original Instructions ...

Page 2: ...the place where the breeze directly blows to the animals and plants It could adversely affect the animals and plants The installation and service engineering should be in accordance with the local laws and regulations If you have any questions contact your distributor or dealer The installation of this air conditioner can only be carried out by dealers or specialists If the user installs the air c...

Page 3: ...y voltage and frequency and accessories to determine if they are correct The standard utilization of the unit shall be explained in these instructions Therefore the utilization of the unit other than those indicated in these instructions is not recommended Please contact your local agent as the occasion arises The company s liability shall not cover defects arising from the alteration performed by...

Page 4: ...tion for Refrigerant Piping 19 4 2 Model of Branch Pipe 22 4 3 Refrigerant Piping Size 24 4 4 Refrigerant Piping Work for Outdoor Unit 25 4 5 Air Tight Test 27 4 6 Vacuuming 28 4 7 Additional Refrigerant Charge Calculation 29 4 8 Additional Refrigerant Charge Work 30 4 9 Pressure Measurement 30 5 Electrical Wiring 31 5 1 General Check 31 5 2 Electrical Wiring Connection 32 5 3 Electrical Wiring fo...

Page 5: ...rant leakage can cause difficulty with breathing due to insufficient air If a refrigerant leakage is found immediately turn OFF the main power supply extinguish any open flame and then contact the service dealer Make sure to perform air tight testing The refrigerant R410A used in this product fluorocarbon is not flammable non toxic and odourless If there is refrigerant leakage exposure to open fla...

Page 6: ...wise it will cause an electrical malfunction or fire Make sure that the terminals are tightened with the specified torque Otherwise it will cause a fire or electrical fault at the terminal block If the supply cord is damaged it must be replaced by the manufacturer its service agent or similarly qualified persons in order to avoid a hazard If there is fire please cut off the power supply immediatel...

Page 7: ...er Power supply for high power equipment is too close to the power wire of the air conditioner Device Ex Lift container crane rectifier for electric railway inverter power device arc furnace electric furnace large sized induction motor and large sized switch It consumes a large quantity of electrical power In the case mentioned above the power wire of the air conditioner generates a large induced ...

Page 8: ...Cylinder 4 Refrigerant Gas Hose 15 Gauge Manifold 5 Megohmmeter 16 Wire Cutters 6 Copper Pipe Bender 17 Gas Leak Detector 7 Manual Water Pump for Indoor Unit 18 Leveller 8 Pliers 19 Crimper for Solderless Terminals 9 Pipe Cutter 20 Hoist for Indoor Unit 10 Brazing Kit 21 Ammeter 11 Hexagon Wrench 22 Voltage Meter It is recommended to use specially designated tools for handling R410A refrigerant ...

Page 9: ...ollution Blow nitrogen during brazing Prevention from Oxidation during Brazing Lubricating Oil For Flare Surface Use a synthetic oil which is equivalent to the oil used in the refrigeration cycle Synthetic oil absorbs moisture quickly Applying Oil to the Flared Surface Vacuum Drying Refrigerant Charge Refrigerant Cylinder Check refrigerant cylinder color Liquid refrigerant charging is required reg...

Page 10: ...ibration Absorber 8 High Pressure Sensor 14 Low Pressure Sensor 20 Air Outlet 3 Crankcase Heater 9 High Pressure Switch 15 4 Way Valve 21 Propeller Fan 4 Compressor 10 Oil Separator 16 Check Joint 22 Fan Motor 5 Liquid Stop Valve 11 Electronic Expansion Valve 17 Check Valve 23 Air Inlet 6 Gas Stop Valve 12 Electrical Box 18 Filter 24 Heat Exchanger ...

Page 11: ...ation Absorber 8 High Pressure Sensor 14 Check Joint 20 Propeller Fan 3 Crankcase Heater 9 High Pressure Switch 15 Low Pressure Sensor 21 Fan Motor 4 Compressor 10 Filter 16 4 Way Valve 22 Air Inlet 5 Liquid Stop Valve 11 Check Valve 17 Accumulator 23 Heat Exchanger 6 Gas Stop Valve 12 Solenoid Valve 18 Electronic Expansion Valve 24 Oil Separator ...

Page 12: ...ration Absorber 8 High Pressure Sensor 14 Low Pressure Sensor 20 Air Outlet 3 Crankcase Heater 9 High Pressure Switch 15 4 Way Valve 21 Propeller Fan 4 Compressor 10 Oil Separator 16 Check Joint 22 Fan Motor 5 Liquid Stop Valve 11 Electronic Expansion Valve 17 Check Valve 23 Air Inlet 6 Gas Stop Valve 12 Electrical Box 18 Filter 24 Heat Exchanger ...

Page 13: ...ributor 20 Filter 4 3 High Pressure Switch 12 Filter 1 21 Solenoid Valve 4 High Pressure Sensor 13 Electronic Expansion Valve 22 Low Pressure Sensor 5 Check Valve 14 Filter 2 23 Crankcase Heater 6 4 Way Valve 15 Liquid Stop Valve 24 Filter 5 7 Check Joint 16 Gas Stop Valve 25 Bypass Capillary Tube 8 Gas Collector 17 Filter 3 26 Heat Exchanger 9 Propeller Fan 18 Accumulator 27 Y shaped Joint ...

Page 14: ...ated as follows Connectable Indoor Unit Capacity Ratio Total Indoor Unit Capacity Total Outdoor Unit Capacity For the same system if the connectable indoor unit capacity ratio is over than 100 and which all the indoor units operate simultaneously the capacity of every indoor unit should be less than its rated capacity Combination capacity is 50 130 When the number of indoor units which are connect...

Page 15: ...e followed the next figure NOTES Make sure the unit is in horizontal while lifting Do not hook with the plastic bands If the unit is lifted after unwrapping the package protect the unit with the corner paddings or cloth Attach corner padding or cloth here The weight of outdoor units is shown in the following table Model Net Weight kg Gross Weight kg RAS 3 0HNBRKQ1 RAS 3 5HNBRKQ1 75 85 RAS 4 0HNBRK...

Page 16: ...r metal frame to provide added support A room Properly insulate any refrigerant tubing run inside a room to prevent sweating that can cause dripping and water damage to wall and floors Damp or uneven areas Use a raised concrete pad or concrete blocks to provide a solid and level foundation for the unit to prevent water damage and abnormal vibration An area with high winds Securely anchor the outdo...

Page 17: ...ps or bits of wiring have been left behind inside the unit being installed After installation work for the system has been completed explain the Safety Precautions the proper use and maintenance of the unit to the customer according to the information in all manuals that came with the system All manuals and warranty information must be given to the user or be left near the Indoor Unit Select a dir...

Page 18: ...ult in a performance drop off and mechanical issues due to insufficient air intake Additionally adequate service space is required for service maintenance access 1 Obstacles on the inlet side a There is no obstacle in the upper side Unit mm Single Installation Multiple Installation b There are obstacles in the upper side Unit mm Single Installation Multiple Installation ...

Page 19: ...15 2 Obstacles on the outlet side and no obstacle in the upper side Unit mm Single Installation Multiple Installation ...

Page 20: ...pper side Unit mm 4 Multi row and multiple installations Unit mm NOTE If L is larger than H mount the units on a base so that H is greater or equal to L Be sure to seal up every surface of the base If the base allows the airflow to go it may cause a short circuit L A mm B mm 0 L 1 2H 600 or more 300 or more 1 2H L H 1400 or more 350 or more ...

Page 21: ... the unit the 5 10mm thickness of rubber gaskets field supplied should be placed under the feet of the outdoor unit which could decrease the vibration into the room a Model RAS 3 0 6 5HNBRKQ1 b Model RAS 7 0 12HNBRMQ1 2 Installation positions of feet air inlet and drain holes are shown in the following figures Model RAS 3 0 6 5HNBRKQ1 Unit mm Concrete ...

Page 22: ...askets have been adopted they should also be positioned under the feet of the outdoor unit 6 When the outdoor unit is installed on a metal frame the metal plates should be used to adjust the frame width for stable installation Recommended Metal Plate Size Field Supplied Material Hot Rolled Mild Steel Plate SPHC Plate Thickness 4 5mm NOTICE Aluminum fins have very sharp edges handle them carefully ...

Page 23: ...er or saw which could produce metal particles 3 Take special care to prevent pollution or moisture settling from going into the interior pipe during piping work 4 Avoid performing the piping connection work for outdoor unit in the rain 5 Refrigerant pipe ends 6 Piping Thickness and Material The thickness of refrigerant pipe differs depending on design pressure For copper tube pay attention to pipe...

Page 24: ...OTE To avoid oxidation and scaling perform brazing at the appropriate temperature D To prevent gas leakage at the brazing connection refer to the table for the insertion depth and the gap for joint pipe Unit mm Diameter ΦD Min Insertion Depth B Gap A D 5 D 8 6 0 05 0 35 8 D 12 7 12 D 16 8 0 05 0 45 16 D 25 10 8 Cautions for Flaring Work A Perform the flaring work as shown below Unit mm Diameter Φd...

Page 25: ...ore making connections to the system D Apply refrigerant oil field supplied slightly on the flare surface of the pipe and flare nut before performing flaring work Tighten the flare nut with the specified torque settings using two wrenches Perform flaring work to the liquid piping side before treating the gas piping side Verify that no gas leakage has occurred after completing flaring work E Be sur...

Page 26: ...0 80 14 18 7 94 5 16 0 80 33 42 8 0 80 33 42 9 52 3 8 0 80 33 42 10 0 80 33 42 12 0 80 50 62 12 7 1 2 0 80 50 62 15 0 80 63 77 15 88 5 8 0 95 63 77 18 1 00 90 110 19 06 3 4 1 00 90 110 4 2 Model of Branch Pipe 1 E 102SN The model of E 102SN branch pipe is used for the model of RAS 3 0 6 5HNBRKQ1 and RAS 7 0 12HNBRMQ1 outdoor unit Unit mm Model E 102SN forRAS 3 0 6 5HNBRKQ1 and RAS 7 0 12HNBRMQ1 Ga...

Page 27: ...nch Connection To Outdoor Unit Keep Vertical Secure the Branch Pipe to the surface of Pillar or Wall Keep K e e p Horizontal H o r i z o n t a l Secure the Branch Pipe to Ceiling surface or Beam Upper side Upper side Upper side Upper side Branch Pipe Branch Pipe Branch connection Bending Main Pipe Radius Main Pipe Branch Pipe Branch Connection Straight Length Main Pipe Min 0 5m Branch Connection B...

Page 28: ...BRMQ1 The piping size L1 L2 L3 d of indoor units differ with indoor unit model please refer to Installation and Maintenance Manual attached to each indoor unit Table 4 2 Piping Work Conditions Item Marks Allowable Piping Length Maximum Piping Length Liquid Pipe Between the outdoor unit and the farthest indoor unit a b c d RAS 3 0 3 5HNBRKQ1 65 meters RAS 4 0 5 0HNBRKQ1 70 meters RAS 6 0 6 5HNBRKQ1...

Page 29: ...iping Work for Outdoor Unit 1 The refrigerant piping can be installed in four directions front right bottom or rear side as shown in the following figures Model RAS 3 0 3 5HNBRKQ1 Model RAS 4 0 6 5HNBRKQ1 RAS 7 0 12HNBRMQ1 ...

Page 30: ...cover from the unit punch out the holes following the guide line with a screwdriver and a hammer Then deburr the holes and attach insulation field supplied for protection of cables and pipes a Front and Right Side Piping Work b Bottom Side Piping Work c Rear Side Piping Work NOTICE Protect cables and refrigerant pipes from the edges of the holes with insulations etc Field supplied Prevent the cabl...

Page 31: ...to detect the joints and stop valves for the piping connection If there is leakage please repair it and repeat the air tight test operation 7 If there is no leakage the nitrogen gas should be discharged from the refrigerant pipes and the air tight test is finished 8 Make sure to insulate the joints for the piping connection as well Seal the gap between the piping cover and pipes with the field sup...

Page 32: ...e than one hour 3 After that turn off the vacuum pump and then observe the pressure for more than two hours 4 If the pressure is over than 0 1MPa obviously a gas leak is suspected Please check the leak position and eliminate it Then repeat the vacuuming work again NOTICE The vacuuming should be performed on the gas stop valve and the liquid stop valve simultaneously Otherwise air may be left in th...

Page 33: ...1 0 020kg m Φ9 52 W12 0 059kg m Φ12 7 W13 0 120kg m For the 4 Way cassette indoor units Model Symbol Numbers Q ty Refrigerant charge per unit Additional charge kg RCI 1 0 1 5 W21 0 23kg pcs RCI 2 0 2 5 W22 0 29kg pcs RCI 3 0 6 5 W23 0 47kg pcs For the other indoor units 0 NOTE Ensure the total additional charge should not be exceeded the max additional refrigerant charge quantity 2 Max Additional ...

Page 34: ...lve and the gas stop valve D Carefully calculate any additional refrigerant quantity for charging If the quantity of additional refrigerant is not correct it might cause the system in an abnormal condition The additional refrigerant must be charged as liquid Do not apply excessive force to the stop valves after fully opening the valves At the test run fully open the gas and liquid stop valves 4 9 ...

Page 35: ... within 10 of the rated voltage If the power supply voltage is too low the system cannot start due to the voltage drop 3 Check the size of the electrical wires 4 Ensure that the ground wiring for the outdoor unit and indoor unit are connected If not it will be cause of fire or an electrical shock 5 Communication cabling shall be a minimum of 0 75mm2 2 Conductor Stranded Copper Shielded cable must ...

Page 36: ...rical Wiring Connection Connect the electrical wiring according to the following figures Figure 5 1 Electrical Wiring Connection for RAS 3 0 6 5HNBRKQ1 Figure 5 2 Electrical Wiring Connection for RAS 7 0 12HNBRMQ1 ...

Page 37: ...als A and B on the terminal block 5 The transmission cable is required to be separated from the power supply wiring Keep at least 5cm distance between the transmission cable and the power supply wiring and also min 1 5m distance between the transmission cable and power supply wiring for other electrical device If the above is not secured put the power supply wiring into the metal conduit tube to s...

Page 38: ... Outdoor Unit Avoid the wirings touching the refrigerant pipes plate edges and electrical parts inside the unit If not the wires will be damaged and at the worst a fire will occur Figure 5 3 Electrical Wiring for RAS 3 0 6 5HNBRKQ1 ...

Page 39: ...ld be chosen according to the following table Total Ampacity A Power Supply Wiring mm2 1 If the total ampacity is over than 63A the power supply wires must not be connected in series I 6 2 5 6 I 10 2 5 10 I 16 2 5 16 I 25 4 25 I 32 6 32 I 40 10 40 I 63 16 63 I 1 The power supply wire should be stranded copper with shielding by neoprene The transmission cables must be made up of the shielded twist ...

Page 40: ...Function Setting DSW1 Test Run DSW5 End Terminal Resistance Setting Figure 6 2 DIP Switches of RAS 7 0 12HNBRMQ1 1 The mark of indicates the position of DIP switches Set the DIP switches according to the introduction of DIP switches inside the outdoor unit 2 Setting for Transmitting It is required to set the refrigerant cycle No of outdoor unit 3 Setting End Terminal Resistance Before shipment No ...

Page 41: ... range of refrigerant cycle No is between 0 and 63 Refrigerant Cycle No The value of the DSW4 System Address Setting Double Digit The value of the RSW1 System Address Setting Single Digit DSW4 System Address Setting Double Digit RSW1 System Address Setting Single Digit DIP Switch Setting Value DIP Switch Setting Value 0 0 10 1 20 2 30 3 40 4 50 5 60 6 7 8 9 ...

Page 42: ...uch any electrical components otherwise it may cause an electrical shock 3 Turn off the main power switch to the indoor unit and the outdoor unit and wait for more than 10 minutes before electrical wiring work or a periodical check is performed 7 2 Test Run by DIP Switch of Outdoor Unit 1 Turn on the power supply of the outdoor and indoor units for more than 12 hours the 7 segment display is light...

Page 43: ...of indoor units connected is indicated on the LCD Liquid crystal display The twin combination one 1 set with two 2 indoor units is indicated as 2 units and the triple combination one 1 set with three 3 indoor units is indicated as 3 units NOTE When 00 unit is indicated the auto address function may be performing Cancel Test Run mode and set it again If the indicated number is not equal to the actu...

Page 44: ... auto swing operation e Though the temperature detections by the thermistors are invalid the protection devices are valid during the test run If an alarm occurs refer to Table 7 2 Alarm Code and perform troubleshooting Then perform the test run again f To finish the test run wait for 2 hours as default setting or press On Off switch again Flashing the operation lamp for 2 seconds ON and 2 seconds ...

Page 45: ... C Outlet DB C WB C 7 Check Refrigerant Temperature Liquid Temperature C Discharge Temperature C 8 Check Pressure Discharge Pressure MPa Suction Pressure MPa 9 Check Voltage Rated Voltage V Operating Voltage L N V Starting Voltage V 10 Check the Input Running Current of the Compressor Running Current A 11 Is the refrigerant charge correct 12 Do the operation control devices operate correctly 13 Do...

Page 46: ...istor Incorrect Wiring Incorrect Piping Connection Expansion Valve Locking at Closed Position Disconnect Connector 11 Abnormality of Inlet Air Thermistor Incorrect Wiring Disconnecting Wiring Breaking Wire Short Circuit 12 Abnormality of Outlet Air Thermistor 13 Freeze Protection Thermistor 14 Abnormality of Gas Piping Thermistor 16 Abnormality of Remote Sensor DOAS 17 Abnormality of Thermistor Bu...

Page 47: ...rmistor Heat Exchanger Clogging Fan Motor Failure 55 Inverter Failure Inverter PCB Failure 57 Activation of Fan Controller Protection Driver IC Error Signal Detection Protection for Overcurrent Low Voltage Short Circuit Instantaneous Overcurrent 5A Abnormality of Fan Controller Fin Temperature Fin Thermistor Failure Heat Exchanger Clogging Fan Motor Failure 5b Activation of Fan Controller Overcurr...

Page 48: ...uring cold starting as it is energized while the compressor is stopped Model RAS 3 0 3 5HNBRKQ1 RAS 4 0 6 5HNBRKQ1 RAS 7 0 8 0HNBRMQ1 RAS 10 12HNBRMQ1 High Pressure Switch Automatic Reset Non Adjustable Automatic Reset Non Adjustable Cut Out MPa 4 15 0 05 0 2 4 15 0 05 0 2 4 15 0 05 0 2 4 15 0 05 0 2 Cut In MPa 3 2 0 15 0 2 3 2 0 15 0 2 3 2 0 15 0 2 3 2 0 15 0 2 Breaker A 32 40 25 40 Crankcase Hea...

Page 49: ...DEMO ...

Page 50: ...DEMO ...

Page 51: ...DEMO ...

Page 52: ...sense Information Industry Park 218 Qianwangang Road Qingdao Economic Development Zone China P01627Q 2019 04 V02 Specifications in this catalogue are subject to change without notice in order that Hisense may bring the latest innovations to their customers 1114326 ...

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