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IMPORTANT:

READ AND UNDERSTAND THIS

INSTRUCTION MANUAL BEFORE

USING THIS AIR CONDITIONER.

KEEP THIS MANUAL FOR FUTURE

REFERENCE.

65MP3156

SELF-CONTAINED

AIR CONDITIONERS

Models:
RUA-13AT3S
RUA-15AT3S
RUA-20AT3S
RUA-30AT3S

Installation, Operation and Maintenance

INSTRUCTIONS MANUAL

Содержание RUA-13AT3S

Страница 1: ...STRUCTION MANUAL BEFORE USING THIS AIR CONDITIONER KEEP THIS MANUAL FOR FUTURE REFERENCE 65MP3156 SELF CONTAINED AIR CONDITIONERS Models RUA 13AT3S RUA 15AT3S RUA 20AT3S RUA 30AT3S Installation Operation and Maintenance INSTRUCTIONS MANUAL ...

Страница 2: ...afe practices which COULD result in minor personal injury or product or property damage Useful information for this operation and or maintenance If you have any questions contact your contractor or dealer of HITACHI This manual gives a common description and information for this air conditioner which you operate as well as for other models This air conditioner has been designed for the following t...

Страница 3: ...ECTRICAL WIRING 4 3 1 Main Power Wiring Procedures 4 3 2 Control Wiring 4 3 3 Printed Circuit Board PCB Layout 5 4 FAN SPEED ADJUSTMENT 7 5 REMOVING SHIPPING WASHERS 8 6 TEST RUNNING 9 6 1 Final Installation Check 9 6 2 Preparation 9 6 3 Test Running 9 6 4 Test Running Record 10 6 5 Safety and Control Device Setting 11 7 MAINTENANCE 12 8 WINTER SHUTDOWN 13 9 REPLACEMENT OF PARTS 13 10 TROUBLESHOOT...

Страница 4: ...oes Not Start 1 Is the main power source switch to the unit ON 2 Is the main fuse normal 3 Is the phase of main power source right Poor Cooling Operation 1 Are there any obstacles which hamper sufficient air to the condenser 2 Check to ensure that the thermostat is set at the desired position 3 Check the air filter for clogging 4 Are there any obstacles which hamper free air flow to the remote con...

Страница 5: ...ground installation provide a gravel or concrete space around the condenser air intake in order to avoid airflow obstruction due to grass or other vegetation Unit Check to ensure that the unit has been transported without damage File a damage claim with the transportation companies if mishandling due to transportation company negligence is suspected 1 2 Transportation Secure the route to the final...

Страница 6: ...e unit upright When transporting the unit after unpacking has been performed take note of the following Rolling Place three equal sized rollers under the base frames Each roller must carry both of the outer frames and must be situated to balance the unit refer to the center of gravity in Fig 4 Lifting by Forklift Insert the forks under the base frames from the indicated direction in Fig 4 Lift the...

Страница 7: ...ons A field supplied or optional filter box with filter must be installed at a proper location in the return air duct It is recommended that flexible duct connections be installed to minimize sound and vibration transmission All ducts running outside must be sufficiently insulated and weatherproofed 2 2 Condensate Drain Piping Tools and Instruments General piping tools Drain Trap A female piping t...

Страница 8: ...ACHI scroll type compressor is fixed therefore a reverse single phase sequence protection relay is equipped in this unit If each phase R S or T of the power source is incorrectly connected the compressor does not start due to the activation of the reverse single phase sequence protection relay Therefore in order to check the correct wiring connection the utilization of a phase sequence indicator i...

Страница 9: ...s Mark Name of Parts CT1 Current Transformer for NO 1 Compressor DSW1 Dip Switch for Capacity Setting CT2 Current Transformer for NO 2 Compressor DSW2 Dip Switch for Optional Function Setting 1 CT3 Current Transformer for NO 3 Compressor DSW3 Dip Switch for Optional Function Setting 2 CN6 Connector for Transformer Input L M Terminal for Different Main Power Supply CN7 Connector for Transformer Out...

Страница 10: ...res Twice Incorrect Wiring Connection of Room Thermostat 1 Check wiring and connections between unit and thermostat Refer to 3 2 Control Wiring 3 Times Trip Detected of Safety Device 1 Check the current for indoor fan motor 2 Check the current for outdoor fan motor 3 Check the pressure of discharge and suction line Refer to 16 Troubleshooting 4 Check the internal thermostat of compressor 4 Times O...

Страница 11: ...urfaces of the fixed pulley 5 Adjust the belt tension approximately 20 mm deflection with one finger by pushing the motor downward and tightening the bolts on the adjusting bracket For Models RUA 13AT3S and RUA 15AT3S For Models RUA 20AT3S through RUA 30AT3S Fig 7 Adjustable Motor Pulley Table 1 Fan Speed Adjustment Model Regulation Space X of Motor Pulley mm Factory Set Point RPM Turn 17 18 19 20...

Страница 12: ...f shipping washers refer to Fig 8 1 Before compressor starting remove the yellow painted shipping washers the compressor should float freely on the rubber isolators Fig 8 1 For Compressor Model 500DH The compressor Models 750EL and 1000EL are mounted on rubber isolators and have no shipping bracket refer to Fig 8 2 Fig 8 2 For Compressor Models 750EL and 1000EL ...

Страница 13: ...r and General Tools Preparation Confirm that the system switch on the room thermostat is at the OFF position Pressure Gauges Equip high and low pressure compound gauges according to Fig 11 Thermostat Set the thermostat at a lower temperature than the room temperature 6 3 Test Running Test running should be performed as follows when the unit is wired according to the HITACHI standard wiring label 1...

Страница 14: ...rt Delay Time Safety Devices Close Close Close Close Close Close Close Close Open Fig 9 1 Standard Operation Sequence NOTES 1 Field Supplied 2 For models RUA 13AT3S and RUA 15AT3S the No 1 condenser fan starts and stops at the same period at which the No 1 compressor starts and stops and No 2 condenser fan operates together the No 2 compressor 3 For models RUA 20AT3S and RUA 30AT3S non cycling con...

Страница 15: ...y Automatic Reset Non Adjustable 220V 60Hz A 32 41 41 52 60 Discharge Gas Thermostat Cut Out C 130 130 130 130 Cut In C 100 100 100 100 Crankcase Heater Capacity W 40 60 60 60 CCP Timer Non Adjustable For Compressor min 3 3 3 3 3 5 min 4 4 4 4 For Evaporator Fan Motor Manual Reset Adjustable Overcurrent Relay 220V 60Hz A 9 9 14 21 For Condenser Fan Motor Internal Thermostat Automatic Reset Non Adj...

Страница 16: ...ange or clean the filter if required The inspection interval may be determined by the operating conditions for each installation site Condensate Drain Pan and Drain Line Inspect and or clean the condensate drain line at least twice a year Evaporator Fan Check for a loosened fan belt and abnormal sounds Lubrication Compressor The compressors are charged at the factory with the correct oil and the c...

Страница 17: ... air nitrogen or refrigerant be charged for these types of tests 8 WINTER SHUTDOWN Winter shutdown When shutting down the unit for winter clean the inside and the outside of the cabinet and dry the unit especially the drain pan and the drain lines This unit shall be preferably covered during shutdown in order to protect it from dust and environmental conditions Spring Start Up After any extended s...

Страница 18: ... suction line Temperature and superheat Suction line Temperature C Superheat C 8 Check Pressures Discharge Pressure kg cm2G Suction Pressure kg cm2G 9 Check Voltage Rated Voltage V Operation Voltage R S V S T V T R V Starting Voltage V Phase Imbalance 1 V Vm 10 Check Compressor input and running current Input kW Running Current A 11 Do the control devices function properly 12 Do the protective dev...

Страница 19: ...place the Contactor Repair the Contacts Replace the Compressor Correct the Wiring No Voltage or Low Voltage Single Phase Shorted Components Loose Connections High Voltage or Low Voltage Single Phase or Phase Imbalance Faulty Fan Bearing Excessive Fan Belt Tension Excessive Fan Load Burned Coil Faulty Contact Defective Operation Switch High Voltage or Low Voltage Single Phase or Phase Imbalance Bur...

Страница 20: ... Suction Pressure Low Discharge Pressure Add Refrigerant See Unit Working Range Operating High Discharge Pressure or Low Suction Pressure Clogged Capillary of Pressure Switch High or Low Pressure Switch Tripped Overcurrent Relay for Compressor Compressor Cycling Insufficient Cooling High Discharge Pressure and High Suction Pressure Loose Connections High Suction Pressure High Discharge Pressure or...

Страница 21: ...Fixed Screws See the Installation Guide Clean the Flexible Ducts Evaporator Air Inlet Temperature High Suction Pressure High Excessive Fresh Air Intake Insufficient Duct Insulation Defective Compressor Valve Overcharged Refrigerant High Discharge Pressure Evaporator Air Flow Low Suction Pressure Restricted Clogged Air Filter Slipping Fan Belt Restricted Duct Low Fan Speed Faulty Fan Motor Short Cy...

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Страница 24: ...65MP3156 Printed in Philippines ...

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