Table of Contents
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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-NP13ATS
RUA-NP15ATS
RUA-NP20ATS
RUA-NP25ATS
RUA-NP30ATS
65MP3179
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Summary of Contents for Hitachi RUA-NP13ATS
- Page 1 SELF-CONTAINED AIR CONDITIONERS Models： ： ： ： RUA-NP13ATS RUA-NP15ATS RUA-NP20ATS Installation, Operation and Maintenance RUA-NP25ATS RUA-NP30ATS INSTRUCTIONS MANUAL REFRIGERANT:R410A IMPORTANT: READ AND UNDERSTAND THIS INSTRUCTION MANUAL BEFORE USING THIS AIR CONDITIONER. KEEP THIS MANUAL FOR FUTURE REFERENCE. 65MP3179...
- 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-NP13ATS RUA-NP15ATS RUA-NP20ATS RUA-NP25ATS RUA-NP30ATS Starting Procedures Troubleshooting Maintenance 1. Switch ON the main power source to the unit. Unit Does Not Start 1. Clean or replace the filter. 2. Set the operation switch of the room thermostat 1. -
Page 5: Preparation
3,000 1,910 1,000 1,000 1,000 1,000 1,400 1,910 Fig. 1. Installation 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
RUA-NP25ATS 2,858 1,968 RUA-NP30ATS 2,858 2,068 For Models RUA-NP13ATS and RUA-NP15ATS For Models RUA-NP20ATS through RUA-NP30ATS Fig. 3. Recommended Concrete Curbs 1.3 Placing the Unit Tools and Instruments – Pincers, Wrenches, Lifting by Forklift – Insert the forks under the Facilities to Transport and Place the Unit. -
Page 7: Installation
INSTALLATION For Models RUA-NP13ATS through RUA-NP20ATS For Models RUA-NP25ATS and RUA-NP30ATS Dimensions (mm) Weight Model (kg) RUA-NP13ATS 1,180 RUA-NP15ATS 1,180 RUA-NP20ATS 1,000 1,325 1,125 RUA-NP25ATS 1,000 1,650 1,350 1,150 RUA-NP30ATS 1,650 1,350 1,055 Fig. 4. Center of Gravity 2. INSTALLATION 2.1 Ducting Arrangement... -
Page 8: Electrical Wiring
A scroll compressor is equipped. Because that the rotation direction of the orbiting scroll of the HITACHI scroll type compressor is fixed, therefore a reverse & single phase sequence protection relay is equipped in this unit. If each... -
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 Settings Capacity 13HP 15HP 20HP 25HP 30HP Setting Position 1 3 4 1 3 4 1 3 4 1 3 4 1 3 4 DSW2: DSW3: DSW4: Optional Function Setting(1) Optional Function Setting(2) Optional Function Setting(3) Function...
- 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) ： (3) 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. CT for Compressor3 Disconnected. Check the Connection for CT3. CT for Compressor4 Disconnected. Check the Connection for CT4. Check the Discharge Pressure for High Pressure Switch PS(H)1 Acted.
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Page 13: Fan Speed Adjustment
For Model RUA-NP13ATS and RUA-NP15ATS 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 For Model RUA-NP20ATS For Models RUA-NP25ATS and RUA-NP30ATS Fig. 7-2. Adjustable Motor Pulley Table 1-2. Fan Speed Adjustment X：Regulation Space of Motor Pulley (mm) Factory Set PD：Pitch Diameter of Motor Pulley (mm) Point Models RPM/Turn X RPM PD 132.0 128.7 125.2 122.2 118.9 115.7 112.4 109.1 105.8... -
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
TEST RUNNING 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 : ON : OFF Main Power Switch(*1) Operation Equipments AUTO AUTO COOL COOLING CALL Room Thermostat(*1) - Page 17 TEST RUNNING For Compressor Model E856DH For Compressor Model E506DH Fig. 10-1 Nominal Operation Pressures for Model RUA-NP13ATS Fig. 10-2 Nominal Operation Pressures for Model RUA-NP15ATS...
- Page 18 TEST RUNNING For Compressor Model E856DH For Compressor Model E506DH Fig. 10-3 Nominal Operation Pressures for Model RUA-NP20ATS Note: Half dotted lines (– - –) marked for models RUA-NP20ATS and RUA-NP25ATS indicate the imaginary line for non-fan cycling control. Add the following values for obtaining the pressures under the fan cycling control.
- Page 19 TEST RUNNING Fig. 10-5 Nominal Operation Pressures for Model RUA-NP30ATS...
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Page 20: Safety And Control Device Setting
TEST RUNNING 6.5 Safety and Control Device Setting Table 3. Safety and Control Device Setting Models RUA-NP13ATS RUA-NP15ATS RUA-NP20ATS RUA-NP25ATS RUA-NP30ATS For Compressor E856DH/ E856DH / E856DH E856DH E856DH E506DH/ E856DH E506DH High Pressure Switch Automatic Reset, Non-Adjustable Cut-Out 4.15 4.15... -
Page 21: 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 22: 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 23 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 24: 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... - Page 25 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 26 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 27 65MP3179...
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