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Summary of Contents for Hitachi RUA-13AT3S
- Page 1 Models: RUA-13AT3S SELF-CONTAINED RUA-15AT3S RUA-20AT3S AIR CONDITIONERS Installation, Operation and Maintenance RUA-30AT3S INSTRUCTIONS MANUAL IMPORTANT: READ AND UNDERSTAND THIS INSTRUCTION MANUAL BEFORE USING THIS AIR CONDITIONER. KEEP THIS MANUAL FOR FUTURE REFERENCE. 65MP3156...
- Page 2 IMPORTANT NOTICE ● HITACHI pursues a policy of continuing improvement in design and performance of products. The right is therefore reserved to vary specification without notice. ● HITACHI cannot anticipate every possible circumstance that might involve a potential hazard. ● No part of this manual may be reproduced without written permission.
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Page 3: Table Of Contents
— CONTENTS — Item .................... Page Operation Instructions ..............Ⅰ PREPARATION ................1 Initial Check ......................Transportation ..................... Placing the unit ....................INSTALLATION ................3 Ducting Arrangement ..................Condensate Drain Piping ..................ELECTRICAL WIRING ..............4 Main Power Wiring Procedures ................Control Wiring ..................... -
Page 5: Preparation
1,000 1,000 1,000 1,000 1,400 2,425 1,500 1,500 Fig. 1. Operation Space NOTE: When the unit is installed at a location, which is encircled with walls and obstruction to free air circulation is suspected, consult HITACHI regarding the operation space. -
Page 6: Placing The Unit
Model RUA-20AT3S 1,836 RUA-30AT3S 2,316 For Models RUA-13AT3S and RUA-15AT3S For Models RUA-20AT3S through RUA-30AT3S Fig. 3. Recommended Concrete Curbs 1.3 Placing the Unit Tools and Instruments – Pincers, Wrenches, Lifting by Forklift – Insert the forks under the base Facilities to Transport and Place the Unit. -
Page 7: Installation
INSTALLATION For Models RUA-13AT3S and RUA-15AT3S For Models RUA-20AT3S through RUA-30AT3S Dimensions (mm) Weight Model (kg) RUA-13AT3S 1,150 RUA-15AT3S 1,220 RUA-20AT3S 1,000 1,035 RUA-30AT3S 1,330 1,070 Fig. 4. Rolling,Lifitng and Rigging 2. INSTALLATION 2.1 Ducting Arrangement 2.2 Condensate Drain Piping Tools and Instruments –... -
Page 8: Electrical Wiring
Fig. 6 or the wiring label. A scroll compressor is equipped. Because that the rotation direction of the orbiting scroll of the Room Thermostat (Field Supplied) HITACHI scroll type compressor fixed, Earth Terminal therefore a reverse &... -
Page 9: Printed Circuit Board (Pcb) Layout
ELECTRICAL WIRING 3.3 Printed Circuit Board (PCB) Layout (RUA-30AT3S only) All DSW were set correctly at factory, do not change settings of DSW. The following figures are only for reference in installation. After installation, make sure all DSW were set as factory setting. 3.3.1 PCB Drawing The PCB in the Unit is operating with 3 types of DIP switches. - Page 10 ELECTRICAL WIRING 3.3.3 Optional Function Settings of Dip Switch (DSW2,3) Before setting DSW, firstly turn off power source and set the position of the DSW. If the switches are set without turning off the power source, the contents of the setting are invalid. Mark of “■” indicates the position of dip switch.
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Page 11: Fan Speed Adjustment
To change the speed, adjust the motor decrease the fan speed by 45 rpm for (models pulley as follows (refer to Fig. 7). RUA-13AT3S and RUA-15AT3S) and 32 rpm for (models RUA-20AT3S and RUA-30AT3S). 1. Loosen the two bolts on the adjusting bracket for the fan belt tension and loosen the belt by 4. -
Page 12: Removing Shipping Washers
REMOVING SHIPPING WASHERS 5. REMOVING SHIPPING WASHERS The compressor Model 500DH is mounted on The compressor Models 750EL and 1000EL are rubber isolators, and is held rigid during shipment mounted on rubber isolators, and have no by two sets of shipping washers (refer to Fig. 8-1). shipping bracket (refer to Fig. -
Page 13: Test Running
– Test running should be performed as follows, Tools and Instruments High and Low when the unit is wired according to the HITACHI Pressure Compound Gauge(s), An Electric Tester, standard wiring label. and General Tools. 1. Set the operation switch to the FAN position –... -
Page 14: Test Running Record
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. -
Page 15: Safety And Control Device Setting
TEST RUNNING 6.5 Safety and Control Device Setting Table 3. Safety and Control Device Setting Models RUA-13AT3S RUA-15AT3S RUA-20AT3S RUA-30AT3S For Compressor Models 500DH/750EL 750EL 1000EL 1000EL High Pressure Switch Automatic Reset, Non-Adjustable Cut-Out kg/cm 3,040 3,040 3,040 3,040 Cut-In... -
Page 16: Maintenance
MAINTENANCE 7. MAINTENANCE Refrigerant Cycle unit should periodically inspected according to the same items as those described in Strainer – Check for clogging after the time when the paragraph entitled "Test Running". In order to the cycle is opened. ensure dependable operation and long life, the Refrigerant Re-Charge –... -
Page 17: Winter Shutdown
Replacement of parts should be performed by because explosion can occur. It ordering from the HITACHI Parts List. The Form A is recommended that HITACHI Recommended Spare Parts List is advisable. When replacement of parts becomes... - Page 18 MAINTENANCE Table 4. Test Running and Maintenance Record MODEL: RUA-_____________ MFG. NO._________________COMPRESSOR MFG. NO.:____________ CUSTOMER'S NAME AND ADDRESS:___________________________________DATE: ____________ 1. Is the rotation direction of the evaporator fan correct? 2. Is the rotation direction of the condenser fan correct? 3. Are there any abnormal sounds? 4.
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Page 19: Troubleshooting
TROUBLESHOOTING 10.TROUBLESHOOTING Troubleshooting Charts The following charts show efficient checking procedures for trouble. ：Fault ：Check ：Cause No Brackets：Remedy No Cooling No Cooling (Compressor Does Not Start) Stopped Evaporator Fan Motor No Voltage or Low Voltage ---------------------------------- Obtain the Correct Voltage Operating Faulty Unit Power Supply... - Page 20 TROUBLESHOOTING Insufficient Cooling Insufficient Cooling Cycling ON Compressor Cycling High Discharge Pressure or ---------------------------- See ”High Discharge Pressure” or Operating Low Suction Pressure ”Low Suction Pressure” Tripped High or Low Clogged Capillary of Pressure Switch ---------------------------- Repair the Clogging and Pressure Switch Replace the Switch if Required Faulty Switch...
- Page 21 TROUBLESHOOTING High Suction Pressure High Suction Pressure Excessive Fresh Air Intake -----------------------------Reduce the Fresh Air Intake High Evaporator Air Inlet Temperature Insufficient Duct Insulation -----------------------------Reinforce the Duct Insulation Defective Compressor Valve -----------------------------Replace or Repair the Compressor Overcharged Refrigerant -----------------------------Charge Correct Refrigerant Quantity -----------------------------See ”High Discharge Pressure”...
- Page 24 65MP3156 Printed in Philippines.
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Hitachi package unit RUA-30AD3S fault code