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Installation, Operation and Maintenance
INSTRUCTIONS MANUAL
REFRIGERANT:R410A
IMPORTANT:
READ AND UNDERSTAND THIS
INSTRUCTION MANUAL BEFORE
USING THIS AIR CONDITIONER.
KEEP THIS MANUAL FOR FUTURE
REFERENCE.
SELF-CONTAINED
AIR CONDITIONERS
Models： ： ： ：
RUA-NP4ATS
RUA-NP5ATS
RUA-NP6ATS
RUA-NP8ATS
RUA-NP9ATS
RUA-NP10ATS
65MP3197
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Related Manuals for Hitachi RUA-NP4ATS
Summary of Contents for Hitachi RUA-NP4ATS
- Page 1 SELF-CONTAINED AIR CONDITIONERS Models： ： ： ： RUA-NP4ATS RUA-NP5ATS RUA-NP6ATS Installation, Operation and Maintenance RUA-NP8ATS RUA-NP9ATS INSTRUCTIONS MANUAL RUA-NP10ATS REFRIGERANT:R410A IMPORTANT: READ AND UNDERSTAND THIS INSTRUCTION MANUAL BEFORE USING THIS AIR CONDITIONER. KEEP THIS MANUAL FOR FUTURE REFERENCE. 65MP3197...
- Page 2 The types of charging refrigerants are indicated in the Installation and Maintenance Manuals, Technical Catalogs, Service Manuals and the specification label in the each unit. Be aware that Hitachi does not take any responsibility for unit failure, troubles of malfunction, and any accidents caused by charging the...
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Page 3: Table Of Contents
— CONTENTS — No. Item ....................Page Operation Instructions ................Ⅰ PREPARATION ..................1 1.1 Initial Check ......................1.2 Transportation ......................1.3 Placing the Unit ......................INSTALLATION ..................3 2.1 Ducting Arrangement ....................2.2 Condensate Drain Piping ..................ELECTRICAL WIRING ................4 3.1 Main Power Wiring Procedures ................ -
Page 4: Operation Instructions
HITACHI SELF-CONTAINED AIR CONDITIONERS OPERATION INSTRUCTIONS Models： ： ： ： RUA-NP4ATS RUA-NP5ATS RUA-NP6ATS RUA-NP8ATS RUA-NP9ATS RUA-NP10ATS Starting Procedures Troubleshooting Maintenance 1. Switch ON the main power source to the unit. Unit Does Not Start 1. Clean or replace the filter. -
Page 5: Preparation
2,105 1,070 1,000 1,000 1,000 1,000 1,200 1,070 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
PREPARATION Dimensions Model deg. deg. RUA-NP4ATS RUA-NP5ATS RUA-NP6ATS RUA-NP8ATS RUA-NP9ATS RUA-NP10ATS Fig. 2. Foundation Gradient Dimension (mm) Model 1,435 RUA-NP4ATS RUA-NP5ATS 1,435 RUA-NP6ATS 1,300 1,709 RUA-NP8ATS 1,300 1,709 RUA-NP9ATS 1,370 2,102 1,370 2,102 RUA-NP10ATS Fig. 3. Recommended Concrete Curbs 1.3 Placing the Unit Tools and Instruments –... -
Page 7: Installation
INSTALLATION Dimensions (mm) Weight Model (kg) RUA-NP4ATS RUA-NP5ATS RUA-NP6ATS 1000 RUA-NP8ATS 1000 RUA-NP9ATS 1200 RUA-NP10ATS 1300 Fig. 4. Center of Gravity 2. INSTALLATION 2.1 Ducting Arrangement 2.2 Condensate Drain Piping Tools and Instruments – General tools for Tools and Instruments – General piping tools. -
Page 8: Electrical Wiring
RUA-NP4ATS through RUA-NP8ATS Connectors A D F RUA-NP9ATS and RUA-NP10ATS Connectors A D E F Fig. 6. Field Wiring Connection... -
Page 9: Printed Circuit Board (Pcb) Layout
ELECTRICAL WIRING 3.3 Printed Circuit Board (PCB) Layout 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 4 types of DIP switches. - Page 10 ELECTRICAL WIRING 3.3.3 Factory Setting of Dip Switch (DSW) DSW1: Capacity Setting 10HP Capacity Setting Position DSW2: DSW3: DSW4: Optional Function Setting(1) Optional Function Setting(2) Optional Function Setting(3) Function 4~10HP Function 4~10HP Function 4~10HP Setting Setting Setting Position Position Position 1 3 4 1 3 4 3.3.4 Optional Function Settings of Dip Switch (DSW2)
- Page 11 ELECTRICAL WIRING 3.3.6 Alarm Detect Function (1) Each alarm code is composed of 2 digits for 1 set, or 4 digits for 2 sets. (2) If the alarm code is composed of 1 set(2 digits)： (2) If the alarm code is composed of 2 sets(4 digits)： (4) If the system is operated under abnormal conditions, the alarm code will be showed as digits by the indicator.
- Page 12 ELECTRICAL WIRING (Continued) Alarm Code Description Check Item CT for Compressor1 Disconnected. Check the Connection for CT1. CT for Compressor2 Disconnected. Check the Connection for CT2. Check the Discharge Pressure for High Pressure Switch PS(H)1 Acted. Compressor1.(Refer to 10.Troubleshooting) Check the Discharge Pressure for High Pressure Switch PS(H)2 Acted.
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Page 13: Fan Speed Adjustment
21.5 For Model RUA-NP4ATS & RUA-NP5ATS For Model RUA-NP6ATS Fig. 7-1. Adjustable Motor Pulley Table 1-1. Fan Speed Adjustment X：Regulation Space of Motor Pulley (mm) Factory Set Point PD：Pitch Diameter of Motor Pulley (mm) -
Page 14: Removing Shipping Washers
FAN SPEED ADJUSTMENT REMOVING SHIPPING WASHERS Models RUA-NP8ATS 21.5 RUA-NP9ATS RUA-NP10ATS For Models RUA-NP8ATS through RUA-NP10ATS Fig. 7-2. Adjustable Motor Pulley Table 1-2. Fan Speed Adjustment X：Regulation Space of Motor Pulley (mm) Factory Set Point PD：Pitch Diameter of Motor Pulley (mm) Models RPM/Turn 112.0 108.8 105.7 102.6 99.4 96.3 93.1 90.0... -
Page 15: Test Running
TEST RUNNING 6. TEST RUNNING 6.1 Final Installation Check Inspect the installation work according to all documents and drawings. Table 2 shows the minimum checkpoints. Table 2. Installation Work Check List INSTALLATION WORK CHECK LIST 1.Is the unit solidly mounted and leveled? 2.Is the installation location adequate? Space for Condenser Air Flow Space for Maintenance Work... -
Page 16: Test Running Record
6.4 Test Running Record Compile test running records according to Table 4. Utilize these records for periodic operation checks, as well as for troubleshooting. Operational Sequence Chart For models: RUA-NP4ATS through RUA-NP8ATS : ON : OFF Main Power Switch(*1) Operation... - Page 17 TEST RUNNING Fig. 10-1 Nominal Operation Pressures Fig. 10-2 Nominal Operation Pressures for Model RUA-NP4ATS for Model RUA-NP5ATS Fig. 10-3 Nominal Operation Pressures Fig. 10-4 Nominal Operation Pressures for Model RUA-NP6ATS for Model RUA-NP8ATS...
- Page 18 TEST RUNNING For Compressor Model E506DH For Compressor Model E406DH Fig. 10-5 Nominal Operation Pressures for Model RUA-NP9ATS Fig. 10-6 Nominal Operation Pressures for Model RUA-NP10ATS...
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Page 19: Safety And Control Device Setting
TEST RUNNING 6.5 Safety and Control Device Setting Table 3. Safety and Control Device Setting RUA- RUA- RUA- RUA- RUA- RUA- Models NP4ATS NP5ATS NP6ATS NP8ATS NP9ATS NP10ATS For Compressor E506DH / E406DH E506DH E626DH E856DH E506DH E406DH High Pressure Switch Automatic Reset, Non-Adjustable Cut-Out 4.15... -
Page 20: Maintenance
MAINTENANCE 7. MAINTENANCE unit should periodically inspected Refrigerant Cycle according to the same items as those described in the paragraph entitled "Test Running". In order to Strainer – Check for clogging after the time ensure dependable operation and long life, the when the cycle is opened. -
Page 21: Winter Shutdown
9. REPLACEMENT OF PARTS Propane or etc. ● Oxygen, Flammable Gases such as Replacement of parts should be performed by ordering from the HITACHI Parts List. The Form A Acetylene or etc. HITACHI Recommended Spare Parts List is ● Poisonous Gases. - Page 22 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.
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Page 23: 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 ------------------------------- Obtain the Correct Voltage No Voltage or Low Voltage Operating Faulty Unit Power Supply... - Page 24 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 25 TROUBLESHOOTING High Suction Pressure High Suction Pressure ----------------------------- Reduce the Fresh Air Intake Excessive Fresh Air Intake High Evaporator Air Inlet Temperature ----------------------------- Reinforce the Duct Insulation Insufficient Duct Insulation ----------------------------- Replace or Repair the Compressor Defective Compressor Valve ----------------------------- Charge Correct Refrigerant Quantity Overcharged Refrigerant ----------------------------- See ”High Discharge Pressure”...
- Page 26 65MP3197...