Table of Contents
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Installation
&
Maintenance
Manual
INVERTER-DRIVEN
SPLIT SYSTEM
HEAT PUMP
AIR CONDITIONERS
- DC INVERTER UTOPIA -
Models:
Outdoor Units;
RAS-3HVRNM2
RAS-4HVRNM2
RAS-5HVRNM2
RAS-6HVRNM2
RAS-7HVRNM2
IMPORTANT:
READ AND UNDERSTAND
THIS MANUAL BEFORE
USING THIS HEAT-PUMP
AIR CONDITIONERS.
KEEP THIS MANUAL FOR
FUTURE REFERENCE.
TC-12001
OUTDOOR UNIT
P5414950
2-73
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Table of Contents
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Summary of Contents for Hitachi RAS-3HVRNM2
- Page 1 Installation & Maintenance Manual INVERTER-DRIVEN SPLIT SYSTEM HEAT PUMP AIR CONDITIONERS - DC INVERTER UTOPIA - Models: Outdoor Units; RAS-3HVRNM2 RAS-4HVRNM2 RAS-5HVRNM2 RAS-6HVRNM2 RAS-7HVRNM2 IMPORTANT: READ AND UNDERSTAND THIS MANUAL BEFORE USING THIS HEAT-PUMP AIR CONDITIONERS. KEEP THIS MANUAL FOR FUTURE REFERENCE.
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Page 2: Important Notice
OUTDOOR UNIT IMPORTANT NOTICE HITACHI pursues a policy of continuing improvement in design and performance of products. HITACHI cannot anticipate every possible circumstance that might involve a potential hazard. This heat pump air conditioner is designed for standard air conditioning only. Do not use this heat pump air conditioner for other purpose such as drying clothes, refrigerating foods or for any other cooling or heating process. -
Page 3: Checking Product Received
Therefore, the utilization of the unit other than those indicated in these instructions is not recommended. Please contact your local agent, as the occasion arises. HITACHI’s liability shall not cover defects arising from the alteration performed by a customer without HITACHI’s consent in a written form. -
Page 4: Table Of Contents
OUTDOOR UNIT TABLE OF CONTENTS 1. Safety Summary .............................1 2. Structure .................................5 2.1 Name of Parts ............................5 2.2 Necessary Tools and Instrument List for Installation ................7 3. Before Installation ............................9 3.1 Selection of Unit Model ..........................9 3.2 Indoor Unit Selection for Multiple Connected Installation...............9 3.3 Standard Combination of Outdoor Unit and Indoor Unit...............10 3.4 Enhanced Combination of Outdoor Unit and Indoor Unit .............. -
Page 5: Safety Summary
OUTDOOR UNIT Safety Summary < Signal Words > Signal words are used to identify levels of hazard seriousness. DANGER will result in death or serious injury. WARNING CAUTION NOTICE NOTE P5414950-rev.1 2-77 TC-12001... - Page 6 OUTDOOR UNIT DANGER Do not perform the installation work, refrigerant piping work, drain pump, drain piping and electrical wiring connection without referring to our installation manual. If the instructions are not followed, it may result in Do not pour water into the indoor or outdoor unit. These products are equipped with electrical parts. If poured, it will cause a serious electrical shock.
- Page 7 OUTDOOR UNIT WARNING CAUTION P5414950-rev.1 2-79 TC-12001...
- Page 8 OUTDOOR UNIT NOTICE Do not install the indoor unit, outdoor unit, remote control switch and cable within approximately 3 meters from strong electromagnetic wave radiators such as medical equipments. Supply electrical power to the system to energize the crankcase heater for 12 hours before startup after a long shutdown.
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Page 9: Structure
OUTDOOR UNIT Structure Name of Parts < 3HP > CN5A PCN9 PCN8 PCN14 PCN13 PCN7 PCN6 PCN10 PCN5 DSW5 SEG1 LED3 LED2 DSW1 RSW1 DSW2 DSW4 REG1 LED4 PCN100 R195 PCN1 AS4755 DRM1 CAUTION Do not connect power supply or transmission wiring to DRM1 and SC terminals. - Page 10 OUTDOOR UNIT < 4 to 7HP > CN5A PCN9 PCN8 PCN14 PCN13 PCN7 PCN6 PCN10 PCN5 DSW5 SEG1 LED3 LED2 DSW1 RSW1 DSW2 DSW4 REG1 LED4 PCN100 R195 PCN1 AS4755 DRM1 CAUTION Do not connect power supply or transmission wiring to DRM1 and SC terminals.
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Page 11: Necessary Tools And Instrument List For Installation
OUTDOOR UNIT Necessary Tools and Instrument List for Installation Tool Tool Tool Handsaw Plier Cutter for Wires Phillips Screwdriver Pipe Cutter Gas Leak Detector Vacuum Pump Brazing Kit Leveller Refrigerant Gas Hose Hexagon Wrench Clamper for Solderless Terminals Megohmmeter Spanner Hoist (for Indoor Unit) Copper Pipe Bender Weigher... - Page 12 OUTDOOR UNIT : Interchangeability is available with current R22 : only for Refrigerant R410A (No Interchangeability with R22) : Prohibited : only for Refrigerant R407C (No Interchangeability with R22) Interchangeability Reason of Non-Interchangeability and Attention with R22 Measuring Instrument and Tool ( : Strictly Required) R410A R407C...
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Page 13: Before Installation
OUTDOOR UNIT Before Installation Selection of Unit Model Calculate Heating Load for each Room Select Indoor Unit Capacity Select Outdoor Unit Capacity Check Unit Capacity Rated Capacity of Outdoor Unit > Total Heating Load Calculate Capacity of each Indoor Unit (1) Selecting Indoor Unit Capacity Set temporarily the indoor unit capacity in each room as following. -
Page 14: Standard Combination Of Outdoor Unit And Indoor Unit
OUTDOOR UNIT Standard Combination of Outdoor Unit and Indoor Unit Outdoor Unit Indoor Unit Single Combination Twin Combination Triple Combination Quad Combination RAS-3HVRNM2 In-the-Ceiling Type RPI-3.0FSN2SQ (RPI-*FSN2SQ) 4-Way Cassette Type RCI-3.0FSN3 RCI-1.5FSN3 x 2 (RCI-*FSN3) In-the-Ceiling Type RPI-1.5FSN2 x 2... -
Page 15: Enhanced Combination Of Outdoor Unit And Indoor Unit
OUTDOOR UNIT Enhanced Combination of Outdoor Unit and Indoor Unit (1) The combination is available with the range of the following conditions. Less than the recommended number of indoor unit should be connected in order to prevent the cold draft during the heating operation with the system that all the indoor units are operated simultaneously. -
Page 16: Transportation And Handling
(a) Do not remove the wooden base during the transportation work. (b) The center of gravity is shown above. (c) Handle the unit to move by more than two people. Gross Weight Model (kg) (mm) (mm) RAS-3HVRNM2 RAS-4HVRNM2 RAS-5HVRNM2 RAS-6HVRNM2 RAS-7HVRNM2 P5414950-rev.1 2-88 TC-12001... -
Page 17: Outdoor Unit Installation
OUTDOOR UNIT Outdoor Unit Installation Factory-Supplied Accessories NOTE Check to ensure that the following accessories are If any of these accessories are not packed with packed with the outdoor unit. the unit, please contact your contractor. Table 5.1 Factory-Supplied Accessories Accessory Q’ty Purpose... - Page 18 OUTDOOR UNIT < Installation in Place where Strong Wind Blows to In Case of Installing Snow Protection Hood Unit > The snow protection hood shall be utilized to protect from mal-defrost in low ambient Install the outdoor unit as followings in the case temperature (below -5 that a strong wind blows to the unit.
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Page 19: Service Space
OUTDOOR UNIT Service Space shown below. (1) Obstacles on Inlet Side (a) Upper Side is Open. (mm) Single Installation Multiple Installation * Around sides * Around sides are open. are closed. Min.200 (3HP) Min.300 (4-7HP) Min.200 (3HP) Min.200 Min.300 (4-7HP) Front Side Front Side Front... - Page 20 OUTDOOR UNIT (2) Obstacles on Discharge Side (a) Upper Side is Open. (mm) Single Installation Multiple Installation Front Side NOTE: Min.100 Min.50 Open both right and left sides. No more than 2 units for multiple installation NOTE: Open both right and NOTE: left sides.
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Page 21: Installation Work
When vibration measures are necessary, (mm) Anchor Bolt add vibration proof rubber. (M10) (Field-Supplied) (mm) Dim. Model RAS-3HVRNM2 RAS-4HVRNM2 RAS-5HVRNM2 1109 Anchor Bolt RAS-6HVRNM2 Front (Air Outlet Side) (M10) RAS-7HVRNM2 Fig. 5.8 Additional Fixing Arrangement Fig. 5.6 Position of Anchor Bolts... - Page 22 OUTDOOR UNIT (5) The drain water is discharged during the (8) The whole of the base of the outdoor unit should be installed on a foundation. When heating and defrosting operation. Choose using vibration-proof mat, it should also be a place where well drainage is available, or positioned the same way.
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Page 23: Refrigerant Piping Work
OUTDOOR UNIT Refrigerant Piping Work permissible concentration of the refrigerant gas in the room. Consult with distributor for countermeasure such a ventilation system, etc. suffocation. Remove the refrigerant piping after the compressor is stopped when repairing, replacing or If the refrigerant piping is not installed completely, the stop valve is opened and the compressor is occur by being abnormally high pressure in the refrigerant cycle. -
Page 24: Piping Materials
OUTDOOR UNIT Piping Materials (1) Prepare locally-supplied copper pipes. (2) Select the piping size from the Table 6.1 and Table 6.2. (3) Select clean copper pipes. Make sure there is no dust and moisture inside of the pipes. Blow the inside of the pipes with nitrogen or dry air, to remove any dust or foreign materials before connecting pipes. -
Page 25: Flaring And Joint
OUTDOOR UNIT Table 6.1 Piping Size of Outdoor Unit Max Lift between Outdoor Unit Outdoor Unit HP Liquid Max. Piping Length and Indoor Unit Actual Length < 50m O.U is Higher than I.U < 30m 15.88 9.52 Equivalent Length < 70m I.U is Higher than O.U <... -
Page 26: Pipe Selection
OUTDOOR UNIT Pipe Selection (1) Select the piping as followings according to the combination of the outdoor unit and the indoor unit(s). In the case that more than 5 indoor units are connected to the outdoor unit, select the line branch. (Refer to “Piping Work for Line Branch”... - Page 27 OUTDOOR UNIT Piping Work for Line Branch Line Branch Piping Length and Branch Piping Selection Outdoor Unit Actual Length Refrigerant Piping Length: L1 Equivalent Length Piping Length from 1st Branch to each Indoor Unit: L2 Piping Length from Branch to Indoor Unit: L3 Height Difference Outdoor / Indoor 30 / 20...
- Page 28 OUTDOOR UNIT (2) Use the branch pipe kit surely to the distributing pipe. Do not use the T-Joint. Fix the branch pipes horizontally to the pillar, wall or ceiling. NOTE: Keep Horizontal To Indoor Unit To Indoor Unit NOTE: piping insulation above by Keep Vertical Branch Connection the cushioning between the...
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Page 29: Piping Connection
OUTDOOR UNIT Piping Connection Stop Valves Position < 3HP > Bottom Piping Hole (Knockout-Hole) (mm) NOTE: The stop valves are inside of the cabinet. Refrigerant Liquid Piping Connection ( 9.52 Flare Nut) Refrigerant Gas Piping Connection ( 15.88 Flare Nut) Rear Side Piping Hole (Knockout-Hole) Refrigerant Piping and... - Page 30 OUTDOOR UNIT (1) Pipes can be connected from 4 directions as (b) Bottom Side Piping Work shown Fig. 6.1. Make a knock-out hole in After removing bottom of the piping cover, the front pipe cover or bottom base to pass perform piping and wiring works.
- Page 31 OUTDOOR UNIT < Operation of Stop Valves > < Charge Port Cap Shaft (Stem) Spindle Valve (Do not apply any torque to rotating direction.) Flare Nut Charge Port Flare Nut Check Joint for Spindle Valve Service Port Outdoor Unit 9-11 68-82 34-42 33-42...
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Page 32: Connecting Refrigerant Pipings
OUTDOOR UNIT Connecting Refrigerant Pipings (1) The stop valve has been closed before shipment, however, make sure that the stop valves are closed completely. (2) Connect the indoor unit and the outdoor unit Suspend the refrigerant piping at certain points and prevent the refrigerant piping from touching the weak part of the building such as wall, ceiling, etc. -
Page 33: Electrical Wiring
OUTDOOR UNIT Electrical Wiring The electrical wiring work must be performed by authorized installers. If not performing the electrical work completely or a capacity shortage of the power circuit, it may cause an electric Perform the electrical work according to each regulation of region and “Installation & Maintenance Manual”... -
Page 34: General Check
OUTDOOR UNIT General Check • • • • P5414950-rev.1 2-106 TC-12001... -
Page 35: Wiring Connection
OUTDOOR UNIT Wiring Connection The wiring connection of the indoor unit should be performed according to “Installation & Maintenance Manual” of the indoor unit. The wiring connection of the outdoor unit is shown in Fig.7.1. NOTICE Do not use a solderless terminal when a single wire is used. If used, it causes abnormal heating at the caulking portion of the terminal. - Page 36 OUTDOOR UNIT (1) Connect the power source cables (L1 and L2 (N) phases) to the terminal board correctly. Connect correctly the power source line phases. 3-Phase 4 Wires: L1, N 3-Phase 3 Wires: L1, L2 In the case of 3-Phases 4 Wires type The power source must be applied from L1 line and N line.
- Page 37 OUTDOOR UNIT Use CASE B method wiring for Australia. The control cable length between the outdoor unit and the indoor unit shall be less than 75m. < CASE A > Power Source Type: 3 Phase 4 Wires Power Source Type: 3 Phase 3 Wires Remote Remote Remote Control...
- Page 38 OUTDOOR UNIT Power Source Type: 3 Phase 4 Wires 220V / 50Hz 220V / 50Hz 240V / 50Hz 240V / 50Hz 220V / 60Hz 220V / 60Hz Remote *3 ELB *2 ELB Control Switch (Option) *5, *8 *6, *9 Main Main Switch Switch...
- Page 39 OUTDOOR UNIT Remote Control Switch Connecting Diagram (a) Installing Remote Control Switch to each (b) Installing One Remote Control Switch with Unit with Individual Operation Setting Individual Operation Setting Indoor Unit Indoor Unit Indoor Unit Indoor Unit Outdoor Unit Outdoor Unit DSW6 DSW6 Remote...
- Page 40 OUTDOOR UNIT (6) The recommended breaker sizes etc. are shown in Table 7.1. Table 7.1 Recommended Electrical Parts Intermediate Wiring Intermediate Wiring Power Main Switch between between Supply Earth I.U. and O.U. I.U. and I.U. Wiring Connection Wiring Wiring Normal Fuse Power Control...
- Page 41 CASE B Control CASE A CASE A CASE A CASE A Source Indoor Outdoor Indoor Outdoor Indoor Outdoor Indoor Outdoor Cable Cable Model RAS-3HVRNM2 0.75 0.75 0.75 RAS-4HVRNM2 0.75 0.75 0.75 RAS-5HVRNM2 0.75 0.75 0.75 RAS-6HVRNM2 0.75 0.75 0.75 RAS-7HVRNM2 0.75 0.75...
- Page 42 IEC 60335-1 MLFC IEC 60335-1 MLFC Current 240V/1 220-240V/1 220V/1 RAS-3HVRNM2 RAS-4HVRNM2 220-240V/1 RAS-5HVRNM2 220V/1 RAS-6HVRNM2 RAS-7HVRNM2 NOTES: 2) The wire sizes marked with *1 in the table above are selected at the maximum current of the unit according to the...
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Page 43: Setting Of Dip Switch
DSW3 Ref. Piping Length / Test Operation Capacity Setting Optional Function Setting 1 2 3 4 Factory Setting Factory Setting RAS-3HVRNM2 1 2 3 4 Cooling Piping Length < 5m RAS-4HVRNM2 1 2 3 4 Heating Piping Length > 30m... - Page 44 OUTDOOR UNIT Setting for Transmitting It is required to set the outdoor unit Nos., refrigerant cycle Nos. and end terminal resistance for this H-LINK or H-LINK II system. Setting of Refrigerant Cycle No. In the same refrigerant cycle, set the same refrigerant cycle No. for the outdoor unit and the indoor units as shown below.
- Page 45 VCTF, VCT, CVV, MVVS, VVR or VVF, size: 0.75mm to 1.25mm (manufactured by HITACHI Cable Co. Ltd.)) or 2 core twist pair cable (equivalent to following cables: KPEV or KPEV-S (manufactured by HITACHI Cable Co. Ltd.)) for the control cable between the outdoor unit and the indoor unit.
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Page 46: Additional Refrigerant Charge
OUTDOOR UNIT Additional Refrigerant Charge Air-Tight Test Vacuum Pump and Refrigerant Charge (1) Check to ensure that the stop valves are (1) Connect a manifold gauge to the check joints closed completely before air-tight test. at the both sides. Continue the vacuum pumping work until the <... - Page 47 OUTDOOR UNIT The gas stayed at the screw part of O-ring is opened and may make sound when removing the cap. However, it is not gas leakage. Use a charging hose because the check joint can (R410A) to the outdoor unit. Do not charge material other than R410A into the unit.
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Page 48: Refrigerant Charging Quantity
OUTDOOR UNIT Refrigerant Charging Quantity Although the refrigerant has been charged into this Calculate the additional refrigerant charge unit, the additional charge is required according to quantity according to the table below. the piping length. In the case of the actual piping Correction Max. - Page 49 OUTDOOR UNIT Dip Switch Setting The dip switch of DSW2 is required according to the piping length as shown below. Check for refrigerant leakage in detail. If a large refrigerant leakage occurs, it will cause SEG1 room. DSW5 LED3 LED2 GAS R410A PSW1 PSW2 PSW3 DSW6 DSW3...
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Page 50: Test Run
OUTDOOR UNIT 10. Test Run Pay attention to the following items while the 10.1 Before Test Run system is running. (A) Do not touch any of the parts by hand at the discharge gas side, since the compressor chamber and the pipes at the discharge side An electrical shock will occur by residual are heated higher than 90 voltage. - Page 51 OUTDOOR UNIT Table 10.1 Test Run and Maintenance Record MODEL: SERIAL. No. COMPRESSOR MFG. No. CUSTOMER'S NAME AND ADDRESS: DATE: 1. Is the rotation direction of the indoor coil fan correct? 2. Is the rotation direction of the outdoor coil fan correct? 3.
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Page 52: Test Run
OUTDOOR UNIT 10.2 Test Run This test run method is for the wired remote control If the indicated number is not equal to the switch (Model: PC-ARF.) The details for the actual connected number of indoor units, operating PC-ARF should be referred to “Installation the auto-address function is not performed &... - Page 53 OUTDOOR UNIT (f) According to the label “Checking Method by 7-Segment Display” attached to the rear side of the service cover of the outdoor unit, check the temperature, the pressure portions, and check the connected indoor unit numbers by 7-segment displays. default setting) or press “...
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Page 54: Optional Function Setting
OUTDOOR UNIT 10.3 Optional Function Setting < Function Setting Method > The function setting should be performed during the outdoor unit stoppage. This setting is not available during External Input / Output Setting. The setting before shipment is “0” Start (Not Available). - Page 55 OUTDOOR UNIT < External Input / Output Setting Method > The setting should be performed during the outdoor unit stoppage. This setting is not available during the operation, the check mode and Input Setting 1 Setting Before Shipment the function setting. Press PSW1 No.
- Page 56 OUTDOOR UNIT Table 10.2 Alarm Code Code Category Content of Abnormality Leading Cause Activation of Float Switch Activation of Protection Device Indoor Unit (High Water Level in Drain Pan, Abnormality of (Float Switch) Drain Pipe, Float Switch or Drain Pan Activation of PSH (Pipe Clogging, Excessive Activation of Protection Device Outdoor Unit...
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Page 57: Safety And Control Device Setting
The other way, when the temperature becomes lower, limitation is cancelled. Model RAS-3HVRNM2 RAS-4HVRNM2 RAS-5HVRNM2 RAS-6HVRNM2 RAS-7HVRNM2 For Compressor Automatic Reset, Non-Adjustable Pressure Switch (each one for each compressor) -0.05 -0.05... - Page 58 2-130 TC-12001...
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