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Hitachi RAS-3.0HNSKQ, Original Instruction, Page: 38 / 52

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Hitachi RAS-3.0HNSKQ Original Instruction Download Page 38

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4.7 Additional Refrigerant Charge Calculation 

Although this unit has been charged the 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-3.0~6.0 

HNSKQ 

For the 

refrigerant 

pipes

 

Pipe 

diameter 

Symbol

 

Total length of 

liquid piping 

(meter)

 

Refrigerant 

charge per 

meter

 

Additional 

charge 

(kg)

 

W=W11+W12 

+W13

Φ6.35

 

W11=

×0.020kg/m=

Φ9.5

3

 

W12=

×0.050kg/m=

Φ12.7

 

W13=

×0.085kg/m=

For the 

Indoor units

 

0 

RAS-6.5~7.0 

HNSKQ 

For the 

refrigerant 

pipes 

Pipe 

diameter 

Symbol

 

Total length of 

liquid piping 

(meter)

 

Refrigerant 

charge per 

meter

 

Additional 

charge 

(kg)

 

W=W11+W12 

+W13+W21

+W22+W23

Φ6.35

 

W11=

×0.020kg/m=

Φ9.5

3

 

W12=

×0.059kg/m=

Φ12.7

 

W13=

×0.120kg/m=

For the 

round-way 

cassette 

indoor units

 

Model

 

Symbol

 

Numbers 

(Q’ty) 

Refrigerant 

charge per 

unit

 

Additional 

charge 

(kg)

 

28~45 

W21= 

×0.23kg/pcs= 

50~71 

W22= 

×0.29kg/pcs= 

80~160 

W23= 

×0.47kg/pcs= 

For the other 

indoor units 

0 

NOTE: 

Ensure the total additional charge should not exceed the max. additional refrigerant charge quantity.

(2) Max. Additional Refrigerant Charge Quantity

Outdoor Unit

 

RAS-3.0~ 

4.0HNSKQ 

RAS-4.5~ 

6.0HNSKQ 

RAS-6.5~ 

7.0HNSKQ 

Max. Additional Refrigerant 

Charge Quantity (kg)

 

3.1

2.7

7.9

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

Outdoor Unit 

W

0

（

kg

）

 

RAS-3.0HNSKQ 

2.5 

RAS-3.5~4.0HNSKQ 

3.1 

RAS-4.5~6.0HNSKQ 

4.0 

RAS-6.5HNSKQ 

5.5 

RAS-7.0HNSKQ 

5.9 

NOTE: 

W0 is outdoor unit refrigerant charge before shipment.

(4) Record of Additional Charge

Summary of Contents for RAS-3.0HNSKQ

Page 1: ...面材质 100g 双胶纸 说明书内页材质 70g 双胶纸 说明书图幅 A4 是否彩色印刷 否 1 2 2019 1 28 杨远强 BZ KF 1901 190 将方形格栅更换为圆形格栅 俆页ǃ ǃ ǃ ǃ 25 28 34 35 2 3 BZ KF 1906 020 2019 06 04 杨远强 杜永 孙龙 杜永 孙龙 80879469 lipengfei14 hisensehitachi com 3 2 BZ KF 1909 013 2019 09 20 李东哲 宋振兴 孙龙 BZ KF 2007 157 2020 07 15 张凯强 何成军 林文涛 4 2 5 2 BZ KF 2012 064 2021 03 17 张凯强 何成军 林文涛 6 1 BZ KF 2103 282 2021 04 01 张凯强 何成军 林文涛 7 4 BZ KF 2112 117 2021 12 20 李鹏...

Page 2: ...series Models Outdoor Units RAS 3 5HNSKQ RAS 4 5HNSKQ RAS 6 0HNSKQ RAS 7 0HNSKQ RAS 3 0HNSKQ RAS 4 0HNSKQ RAS 5 0HNSKQ RAS 6 5HNSKQ IMPORTANT READ AND UNDERSTAND THIS MANUAL BEFORE USING THIS HEAT PUMP AIR CONDITIONERS KEEP THIS MANUAL FOR FUTURE REFERENCE RAS 3 0 4 0HNSKQ RAS 4 5 6 0HNSKQ RAS 6 5 7 0HNSKQ ...

Page 3: ......

Page 4: ...trols Inc is authorised to Compile the Technical Construction File Add Westendhof 3 45143 Essen Germany Name Surname Position Title Director Date December 20 2021 Manufacturer s Declaration Qingdao Hisense Hitachi Air conditioning Systems Co Ltd Add No 218 Qianwangang Road Economic and Technological Development Zone Qingdao China declares under its sole responsibility that the air conditioning mod...

Page 5: ......

Page 6: ...lectromagnetic wave such as a radio Do not install the unit in the place where the breeze directly catches the animals and plants It could adversely affect the animals and plants The installation should be in accordance with the local laws and regulations The following standards may be applicable if the local regulations are not available International Organization for Standardization ISO5149 or E...

Page 7: ...to determine if they are in accordance with the purchase order The standard utilization of the unit shall be explained in the instructions Therefore the utilization of the unit other than those indicated in the instructions is not recommended In case of any problem please contact the local dealer as any issues involving installation performance or maintenance arise The company s liability shall no...

Page 8: ... 4 1 Precaution for Refrigerant Piping 19 4 2 Model of Branch Pipe 22 4 3 Refrigerant Piping Size 23 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 Wring 31 5 1 General Check 31 5 2 Electrical Wiring Connection 32 5 3 Electrical...

Page 9: ......

Page 10: ...n which if not avoided will result in death or serious injury WARNING indicates a hazardous situation which if not avoided could result in death or serious injury CAUTION used with the safety alert symbol indicates a hazardous situation which if not avoided could result in minor or moderate injury NOTE NOTE is useful information for operation and or maintenance NOTICE is used to address practices ...

Page 11: ...t which could cause suffocation The installer and system specialist shall secure safety against refrigerant leakage according to local regulations or standards Use an ELB Earth Leakage Breaker In the event of fault there is danger of an electric shock or a fire if it is not used Do not install the outdoor unit where there is high level of oil mist flammable gases salty air or harmful gases such as...

Page 12: ... physical sensory or mental capabilities or lack of experience and knowledge unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety Children should be supervised to ensure that they do not play with the appliance This appliance can be used by children aged from 8 years and above and persons with reduced physical sensory or me...

Page 13: ...d air conditioner may not be operated normally under the following cases In case that electrical power for the packaged air conditioner is supplied from the same power transformer as the device In case that the power source wires for the device and the packaged air conditioner are located close to each other Device Ex Lift container crane rectifier for electric railway inverter power device arc fu...

Page 14: ...llution Blow nitrogen during brazing Prevention from Oxidation during Brazing Lubrication 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 l Refrigerant Charge Refrigerant Cylinder Check refrigerant cylinder color Liquid refrigerant charging is required re...

Page 15: ...tion Absorber 8 High Pressure Sensor 14 Low Pressure Switch 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 21 20 ...

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

Page 17: ...Absorber 8 High Pressure Sensor 14 Check Joint 20 Propeller Fan 3 Crankcase Heater 9 High Pressure Switch 15 Low Pressure Switch 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 18: ...1 21 Solenoid Valve 4 High Pressure Sensor 13 Electronic Expansion Valve 22 Low Pressure Switch 5 Check Valve 14 Filter 2 23 Crankcase Heater 1 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 Refrigerant cooling 2 4 Model of Indoor Unit and Outdoor Unit Table 2 1 ...

Page 19: ...1 8 RAS 4 5HNSKQ 12 5 6 25 15 6 2 5 1 8 RAS 5 0HNSKQ 14 0 7 18 2 2 6 1 8 RAS 6 0HNSKQ 16 0 8 20 8 2 6 1 8 RAS 6 5HNSKQ 18 0 9 23 4 2 9 1 8 RAS 7 0HNSKQ 20 0 10 26 2 10 1 8 NOTE The connectable indoor unit capacity ratio can be calculated as follows Connectable Indoor Unit Capacity Ratio Total Indoor Unit Capacity Total Outdoor Unit Capacity For the same system if the connectable indoor unit capaci...

Page 20: ...ook with the plastic bands If the unit is lifted after unwrapping the package protect the unit with the corner paddings or cloth Do not place or leave any other objects cables tools inside the outdoor unit or control board and verify that nothing remains there prior to installation and test run Ignoring the instructions can lead to damage and fire incidents 2 6 Factory supplied Accessories The acc...

Page 21: ...can accumulate such as near a hot tub or hot spring Where dense salt laden airflow is heavy such as in coastal regions Where the air quality is of high acidity Where harmful gases can be generated from decomposition Do not install the indoor unit where such dripping can cause moisture damage or uneven locations Use a raised concrete pad or concrete blocks to provide a solid and level foundation fo...

Page 22: ...vide sufficient space around the outdoor unit for operation and maintenance NOTE If strong wind blows direct to the air outlet the needed airflow volume cannot be maintained and the outdoor unit may be difficult to operate normally If excessively strong wind blows to the air outlet consecutively it may cause the propeller fan or the fan motor breakage by high speed rotation or overload ...

Page 23: ...t 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 24: ...15 2 Obstacles on the outlet side and no obstacle in the upper side Unit mm Single Installation Multiple Installation ...

Page 25: ... upper 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 26: ...ndoor by the base of 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 Model RAS 3 0 7 0HNSKQ 2 Installation positions of feet air inlet and drain holes are shown in the following figures Model RAS 3 0 7 0HNSKQ Unit mm ...

Page 27: ...e of concrete or metal frame When the rubber gaskets 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 Incorrect Correct Recommended Metal Plate Size Field Supplied Material Hot Rolled Mild Steel Plate SPHC Plate Thickness 4 5mm A...

Page 28: ...trogen or dry compressed air into the pipes to remove any dust or foreign materials before connecting them Do not use any cutting tools such as a grinder 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...

Page 29: ... pressure reducing valve Do not use field supplied antioxidant B Use a type of flux with a low chlorine concentration C Washing the weld joints to remove all flux completely after completing brazing work NOTE 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 joi...

Page 30: ... at the flared end before 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...

Page 31: ...22 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 7 0HNSKQ outdoor unit Unit mm Model E 102SN for RAS 3 0 7 0HNSKQ Gas Pipe Liquid Pipe ...

Page 32: ... branch pipe straight and the length of the straight pipe is no less than 0 5 meter 4 3 Refrigerant Piping Size Example of connection connection of 4 indoor units Table 4 1 Piping Size of Main Pipe Model Stop Valve mm Pipe between the outdoor unit and the 1st branch pipe The pipes between the branch pipes Gas Liquid Gas Liquid Marks RAS 3 0 7 0HNSKQ Φ15 88 Φ9 53 Φ15 88 Φ9 53 a b c ...

Page 33: ... 4 0HNSKQ 25 meters RAS 4 5 6 0HNSKQ 60 meters RAS 6 5 7 0HNSKQ 75 meters Total liquid pipe length a b c d L1 L2 L3 RAS 3 0HNSKQ 30 meters RAS 3 5 4 0HNSKQ 40 meters RAS 4 5 6 0HNSKQ 70 meters RAS 6 5 7 0HNSKQ 120 meters Between the 1st branch pipe and the farthest indoor unit b c d 30 meters Between branch pipes and connected indoor units L1 L2 L3 d 10 meters Allowable Height Difference Outdoor u...

Page 34: ...nd the first branch Front Hole for Refrigerant Piping Knockout Hole Right Hole for Refrigerant Piping Knockout Hole Bottom Hole for Refrigerant Piping Knockout Hole Rear Side Piping Cover Stop valves Refrigerant Piping Rear Hole for Refrigerant Piping Knockout Hole Front Side Piping Cover Front Hole for Refrigerant Piping Knockout Hole Right Hole for Refrigerant Piping Knockout Hole Bottom Hole fo...

Page 35: ...AS 3 0 7 0HNSKQ 11 14 N m 7 9 N m 3 If the direction of the refrigerant piping has been chosen please remove the piping 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 Prot...

Page 36: ...e the piping may be damaged 4 Securely insulate the gas piping and liquid piping separately 5 Connect the manifold gauge and the charging hoses to the check joints of the stop valves with a nitrogen tank Perform the air tight test at 4 15 MPa for the test pressure 6 For the air tight test please use a leak detector or forming agent to detect the joints and stop valves for the piping connection If ...

Page 37: ...re 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 higher than 0 1MPa obviously the gas leak is suspected Please check the leak position and eliminate it Then repeat the vacuuming work again The vacuuming should be performed on the gas stop valve and the liquid stop valve simultaneously Otherwise air may be left in the ...

Page 38: ... of liquid piping meter Refrigerant charge per meter Additional charge kg W W11 W12 W13 W21 W22 W23 Φ6 35 W11 0 020kg m Φ9 53 W12 0 059kg m Φ12 7 W13 0 120kg m For the round way cassette indoor units Model Symbol Numbers Q ty Refrigerant charge per unit Additional charge kg 28 45 W21 0 23kg pcs 50 71 W22 0 29kg pcs 80 160 W23 0 47kg pcs For the other indoor units 0 NOTE Ensure the total additional...

Page 39: ...htly open C After the refrigerant is charged fully open the liquid stop valve 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...

Page 40: ...y voltage is 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 cause a fire or an electrical shock 5 Communication cabling shall be a minimum of 0 75mm2 2 Conductor Stranded Copper Shielded cab...

Page 41: ...ed Ampacity A Power Supply Wiring Cores mm2 Transmission cable Cores mm2 ELB Rated Ampacity A Rated Sensitive Ampacity mA RAS 3 0 4 0HNSKQ 220 240V 1Ph 50Hz 25 3 4 0 2 0 75 32 30 RAS 4 5HNSKQ 220 240V 1Ph 50Hz 30 3 6 0 2 0 75 40 30 RAS 5 0HNSKQ 220 240V 1Ph 50Hz 31 3 6 0 2 0 75 40 30 RAS 6 0HNSKQ 220 240V 1Ph 50Hz 33 3 10 0 2 0 75 40 30 RAS 6 5HNSKQ RAS 7 0HNSKQ 220 240V 1Ph 50Hz 220 240V 1Ph 50Hz...

Page 42: ...ansmission cable and power supply wiring for other electrical devices If it is not secured put the power supply wiring into the metal conduit tube to separate from other wirings 6 Do not connect the power supply wiring to the terminals 1 and 2 on the terminal block for transmission wiring Otherwise printed circuit board may be damaged 7 Connect the ground wire for the outdoor indoor units The grou...

Page 43: ...irings touching the refrigerant pipes plate edges and electrical parts inside the unit If not the wirings will be damaged and a f re may be happened Figure 5 3 Electrical Wiring for RAS 4 5 6 0HNSKQ 34 Figure 5 2 Electrical Wiring for RAS 3 0 4 0HNSKQ ...

Page 44: ...osen 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 4 The power supply wire should be stranded copper with shielding by neoprene 5 The transmission cables must be made up of the shielded twist pair...

Page 45: ...Set the DIP switches according to the introduction of DIP switches inside of 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 1 pin of DSW5 is set at the ON side If there are 2 or more units in the same communication system set No 1 pin of DSW5 at the OFF side from the 2nd refrigerant gro...

Page 46: ...t Cycle No In the same refrigerant cycle set the same refrigerant cycle No for the outdoor unit and the indoor units as shown below The range of refrigerant cycle No is between 0 and 63 62 63 0 1 2 3 4 OFF ON 2 1 4 5 6 DSW4 3 ...

Page 47: ...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 units and indoor units for more than 12 hours the 7 segment display is lighting 2 Check the 7 segment display of the ...

Page 48: ... 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 49: ...ion 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 Built in Wired Controller 18 Activation of Protection Devic...

Page 50: ... 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 Overcurrent Protection Fan Motor Failure 5C Probl...

Page 51: ...ge pressure exceeds the setting 2 Crankcase Heater This band type heater protects against oil foaming during cold starting as it is energized while the compressor is stopped Model RAS 3 0 4 0HNSKQ RAS 4 5 7 0HNSKQ High Pressure Switch Automatic Reset Non Adjustable Cut Out MPa 4 15 4 15 Cut In MPa 3 2 3 2 Breaker A 40 50 Crankcase Heater W 24 28 CCP Timer Setting Time Min Non Adjustable 3 Non Adju...

Page 52: ...P01604Q 2021 12 V08 1111317 Qingdao Hisense Hitachi Air conditioning Systems Co Ltd No 218 Qianwangang Road Economic and Technological Development Zone Qingdao China ...

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