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& Maintenance Manual INVERTER-DRIVEN SPLIT SYSTEM HEAT PUMP AIR CONDITIONERS - DC INVERTER UTOPIA IVX - Model: Outdoor Unit; RAS-8FSNM RAS-10FSNM RAS-12FSNM IMPORTANT: READ AND UNDERSTAND THIS MANUAL BEFORE USING THIS HEAT-PUMP AIR CONDITIONERS. KEEP THIS MANUAL FOR FUTURE REFERENCE.
IMPORTANT NOTICE G HITACHI pursues a policy of continuing improvement in design and performance of products. The right is therefore reserved to vary specifications without notice. G HITACHI cannot anticipate every possible circumstance that might involve a potential hazard. G This heat pump air conditioner is designed for standard air conditioning only. Do not use this heat pump air conditioner for other purposes such as drying clothes, refrigerating foods or for any other cooling or heating process.
SAFETY SUMMARY G Use refrigerant R410A in the refrigerant cycle. Do not charge oxygen, acetylene or other flammable and poisonous gases into the refrigerant cycle when performing a leakage test or an air-tight test. These types of gases are extremely dangerous and can cause an explosion.
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SAFETY SUMMARY G 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 equipment. G Supply electrical power to the system to energize the oil heater for 12 hours before start-up after a long shutdown.
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.
TABLE OF CONTENTS 1. Safety Summary ........................1 2. Structure ........................... 1 Outdoor Unit & Refrigerant Cycle ..................1 Necessary Tools and Instrument List for Installation ............3 3. Transportation and Handling ....................4 Transportation ......................... 4 Handling of Outdoor Unit ....................4 4.
1. Safety Summary G Do not perform installation work, refrigerant Do not install the indoor unit, outdoor unit, piping work, drain piping and electrical remote control switch and cable within wiring connection without referring to the approximately 3 meters from strong installation manual.
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<Refrigerant Cycle> <Outdoor Unit> Ambient Thermistor Discharge Gas Thermistor Discharge Gas Thermistor Thermistor Compressor Heat Exchanger Sensor for Regrigerant Pressure Oil Separator Accumulator Strainer(3/8) Strainer(1/2) Strainer(3/4) Distributor Reversing Valve Capillary Tube Electronic Expansion Valve Check Valve Solenoid Valve Solenoid Valve Check Joint Stop Valve for Liquid Line Stop Valve for Gas Line...
Base base as shown. Fig. 3.1 Hanging Work for Transportation (kg) Model Unit Gross Weight RAS-8FSNM(Q) RAS-10FSNM(Q) RAS-12FSNM(Q) G Lift the outdoor unit in its factory packaging with 2 wire ropes. Fig. 3.2 Handling of Outdoor Unit G For safety reasons ensure that the outdoor unit is lifted smoothly and does not lean.
4. Outdoor Unit Installation Factory-Supplied Accessories • Do not install the outdoor unit in a space where a seasonal wind directly blows to the outdoor Check to ensure that the following accessories heat exchanger or a wind from a building space are packed with the outdoor unit.
Service Space Install the outdoor unit with a sufficient space around the outdoor unit for operation and maintenance as shown below. (1) Obstacles on Inlet Side (a) Upper Side is Open. (mm) Single Installation Multiple Installation * Around sides * Around sides are open.
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(2) Obstacles on Discharge Side (a) Upper Side is Open. (mm) Single Installation Multiple Installation Min. Front Side Min. 700 Min.100 Min.50 Fit positions " " with unit front side. NOTE: NOTE: Mount the airflow guide and Mount the airflow guide and open both open right end or left end.
Installation Work (1) Secure the outdoor unit with the anchor (4) Multi-Row and Multiple Installations bolts. Air Flow Direction Base of Outdoor Unit Special Washer Anchor Bolt Concrete Filled Mortar Fig. 4.5 Installation Space (5) Fig. 4.6 Installation of Anchor Bolts Keep a distance of more than 15mm between other units and do not put obstacles on the right Fix the outdoor unit to the anchor bolts by...
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(4) Fix the outdoor unit firmly so that declining, making noise, and falling down by strong Incorrect wind or earthquake is avoided. Base Width of Outdoor Unit 100mm Fixing Plate (Field-Supplied) Both sides on the unit fixing Outdoor Unit can be possible. is Unstable.
Refrigerant Piping Work G Flaring Dimension Perform the flaring work as shown below. Use refrigerant R410A in the refrigerant cycle. (mm) Do not charge oxygen, acetylene or other Diameter -0.4 flammable and poisonous gases into the R410A refrigerant cycle when performing a leakage 6.35 test or an air-tight test.
Equivalent Length ≤ 125m Indoor Unit is higher than Outdoor Unit: ≤ 40m q12.7 RAS-12FSNM(Q) 25.4 (*1): The accessory pipe with flange is attached. (*2): Select the liquid piping size of q12.7 when the piping length is more than 70m. only for RAS-8FSNM(Q)
FSNM(Q) FSNM(Q) FSNM(Q) 0.8 1.5 2.5 5.0 10.0 8FSNM(Q) 10FSNM(Q) 12FSNM(Q) Piping Connection Pipes can be connected from 4 directions. Hold down the cover slowly. Rear Side Rear Cover Piping Cover Rear Side Piping Work (Knock-Out Hole) Rear Side Piping Cover Right Side Piping Work Front Side (Knock-Out Hole)
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(1) Confirm that the valve is closed. Right Side Piping Hole (2) Prepare a field-supplied bend pipe for liquid line. Connect it to the liquid valve by flare nut through the square hole of bottom base. For Piping Connection When tightening the flare nut, use two spanners.
(c) Rear Piping Work (4) Stop Valve After removing rear piping cover, punch Operation of the stop valve should be out the “C” holes along the guide line. performed according to the below. <Gas Valve> Rear Cover NOTE: To avoid damage protect cables and pipes with adequate insulation (Field- Supplied).
(5) Connect the gauge mani-fold using (4) This system is not necessary to charge charging hoses with a nitrogen cylinder to refrigeration less than 30m of the actual the check joints of the liquid line and the piping length. If the total piping length is gas line stop valves.
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φ9.53x5m φ6.35x10m <Example> RAS-12FSNM(Q) <Table 1> No. 0 No. 2 Outdoor Unit Outdoor Unit φ9.53x5m Ref. Charge (kg) RAS-8FSNM(Q) No. 1 No. 3 RAS-10FSNM(Q) φ9.53x5m RAS-12FSNM(Q) NOTE: is outdoor unit ref. charge before shipment. φ12.7x10m φ9.53x5m φ6.35x10m See Example for Model RAS-12FSNM(Q), and fill in the following table.
Caution of the Pressure by Check Joint When the pressure is measured, use the check joint of gas stop valve ((A) in the figure below) and use the check joint of liquid piping ((B) in the figure below). At that time, connect the pressure gauge according to the following table because of high pressure side and low pressure side changes by operation mode.
Electrical Wiring Collecting Refrigerant When the refrigerant should be collected into the outdoor unit due to indoor/outdoor unit relocation, collect the refrigerant as follows. G Turn OFF the main power switch to the (1) Attach the manifold gauge to the gas stop indoor unit and the outdoor unit and wait for valve and the liquid stop valve.
6.2 Electrical Wiring Connection 6.2. For Outdoor Unit and the outdoor unit coincide correctly. If not, some component will be damaged. The electrical wiring connection for the outdoor unit is shown in Fig. 6. () Use shielded wires (>0.75mm ) for (1) Connect the power supply wires to L1, L2, intermediate wiring to protect electrically L3, and N (for 380-415V), to R, S and T (for...
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Outdoor Unit / Power Supply Line No. 0 System No. 1 System No. 3 System Outdoor Unit Outdoor Unit Outdoor Unit L1 L2 L3 N L1 L2 L3 N L1 L2 L3 N Operating Line (Shielded Twist Pair Cable) DC5V (Non-Pole Transmission H-LINK II System) Distribution Box or Pull Box Distribution Box or Pull Box FUSE...
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3) The wire sizes marked with *2 in the table of this page are selected at the maximum current of the unit according to the wire, MLFC (Flame Retardant Polyflex Wire) manufactured by Hitachi Cable Ltd., Japan. 4) Use a shielded cable for the transmitting circuit and connect it to ground.
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Power Source of Power Source Line Power Source Line Indoor Unit Remote Distribution Box Remote Distribution Box Remote Distribution Box Control Line or Pull Box Control Line or Pull Box Control Line or Pull Box (Field-Supplied) It is need for China and (Field-Supplied) It is need for China and (Field-Supplied)
Test Run Test run should be performed according to the Table 7.2 on page 26. And use the Table 7.1 on page 25 for recording test run. G Do not operate the system until all the check points have been cleared. (A) Check to ensure that the electrical resistance is more than 1 megohm, by measuring the resistance between...
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Table 7.1 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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Table 7.2 Checking of Wire Connection by Test Run NOTE: "TEST RUN" shall be performed with each refrigerant cycle (each outdoor unit). (1) Turn ON the power source of the units. Setting Temperature (2) Procedure for "TEST RUN" mode of remote control switch. HIGH SET TEMP.
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Table 7.3 Alarm Code Code Category Content of Abnormality Leading Cause Indoor Unit Activation of Protection Device Activation of Float Switch, High Level in Drain Pan Activation of PSH, Pipe Clogging, Excessive Outdoor Unit Activation of Protection Device Refrigerant, Inert Gas Mixing Abnormality between Indoor and Incorrect Wiring, Loose Terminals, Disconnect Wire, Transmission...
The other way, when the temperature becomes lower, limitation is cancelled. Model RAS-8FSNM(Q) RAS-10FSNM(Q) RAS-12FSNM(Q) For Compressor Pressure Switch Automatic Reset, Non-Adjustable High Cut-Out -0.05...