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Installation
and
Maintenance
Manual
INVERTER-DRIVEN
MULTI-SPLIT SYSTEM
HEAT PUMP AND
HEAT RECOVERY
AIR CONDITIONERS
Models:
Water Source Units;
AVWW-344FKFW
AVWW-76FKFW
AVWW-360FKFW
AVWW-96FKFW
AVWW-380FKFW
AVWW-114FKFW
AVWW-400FKFW
AVWW-136FKFW
AVWW-418FKFW
AVWW-154FKFW
AVWW-440FKFW
AVWW-170FKFW
AVWW-456FKFW
AVWW-190FKFW
AVWW-476FKFW
AVWW-210FKFW
AVWW-494FKFW
AVWW-228FKFW
AVWW-516FKFW
AVWW-250FKFW
AVWW-534FKFW
AVWW-268FKFW
AVWW-550FKFW
AVWW-286FKFW
AVWW-570FKFW
AVWW-304FKFW
AVWW-326FKFW
IMPORTANT:
READ AND UNDERSTAND
THIS MANUAL BEFORE
INSTALLING THIS HEAT PUMP AND
HEAT RECOVERY AIR CONDITIONER.
KEEP THIS MANUAL FOR
FUTURE REFERENCE.
M00261Q
ORIGINAL INSTRUCTIONS
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Table of Contents
Related Manuals for Hisense AVWW-76FKFW
Summary of Contents for Hisense AVWW-76FKFW
- Page 1 Installation Maintenance Manual INVERTER-DRIVEN MULTI-SPLIT SYSTEM HEAT PUMP AND HEAT RECOVERY AIR CONDITIONERS Models: Water Source Units; AVWW-344FKFW AVWW-76FKFW AVWW-360FKFW AVWW-96FKFW AVWW-380FKFW AVWW-114FKFW AVWW-400FKFW AVWW-136FKFW AVWW-418FKFW AVWW-154FKFW AVWW-440FKFW AVWW-170FKFW AVWW-456FKFW AVWW-190FKFW AVWW-476FKFW AVWW-210FKFW AVWW-494FKFW AVWW-228FKFW AVWW-516FKFW AVWW-250FKFW AVWW-534FKFW AVWW-268FKFW AVWW-550FKFW...
- Page 3 Manufacturing number and manufacturing year: refer to model Nameplate. Notes: This declaration becomes invalid, if technical or operational modifications are introduced without the manufacturers consent. Hisense Italia S.r.l. is authorised to Compile the Technical Construction File. Ad. : Via Montefeltro 6A, 20156 Milano. Name, Surname Position/ Title...
- Page 4 Important Notice ● Hisense pursues a policy of continuing improvement in design and performance in its products. As such, Hisense reserves the right to make changes at any time without prior notice. ● Hisense cannot anticipate every possible circumstance that might involve a potential hazard.
- Page 5 Liability does not cover defects originating from unauthorized modifications performed by a customer without the written consent of Hisense. Performing any mechanical alterations on this product without the consent of the manufacturer will render your warranty null and...
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Page 6: Table Of Contents
TABLE OF CONTENTS 1. Introduction ................................1 2. Important Safety Instructions ..........................1 3. Before Installation ..............................7 3.1 Factory-Supplied Accessories ........................7 3.2 Necessary Tools and Instrument List for Installation ..................8 3.2.1 Heat Pump System ..........................8 3.2.2 Heat Recovery System ........................8 4. - Page 7 TABLE OF CONTENTS 9. Additional Refrigerant Charge ..........................44 9.1 Leak Test ..............................44 9.2 Vacuuming ..............................47 9.3 Charging Work ............................48 9.4 Additional Refrigerant Charge Calculation ....................50 10. Test Run ................................52 10.1 Before Test Run ............................52 10.2 Test Run for Water Piping ...........................
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Page 8: Introduction
Never bypass or jump-out any safety device or switch. ● Hisense will not assume any liability for injuries or damage caused by not following steps outlined or described in this manual. Unauthorized modifications to Hisense products are prohibited as they…... - Page 9 Take the following precautions to reduce the risk of property damage. ● Be careful that moisture, dust, or variant refrigerant compounds not enter the refrigerant cycle during installation work. Foreign matter could damage internal components or cause blockages. ● If air filters are required on this unit, do not operate the unit without the air filter set in place. If the air filter is not installed, dust may accumulate and breakdown may result.
- Page 10 ● Before performing any brazing work, be sure that there are no flammable materials or open flame nearby. ● Perform a test run to ensure normal operation. Safety guards, shields, barriers, covers, and protective devices must be in place while the compressor/unit is operating. During the test run, keep fingers and clothing away from any moving parts.
- Page 11 Hisense distributors similarly are only authorized to provide refrigerants that have been approved for use in the countries or markets they serve. The refrigerant used in this unit is identified on the unit’s faceplate and/or in the associated manuals.
- Page 12 When shielded cable is applied, secure properly and terminate cable shield as required per Hisense guidelines. Plenum and riser ratings for communication cables must be considered per application and local code requirements.
- Page 13 ● After ceasing operation, be sure to wait at least five minutes before turning of the main power switch. Otherwise, water leakage or electrical breakdown may result. Disconnect the power supply completely before attempting any maintenance for electrical parts. Check to ensure that no residual voltage is present after disconnecting the power supply.
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Page 14: Before Installation
3. Before Installation Factory-Supplied Accessories Check to ensure that the following accessories are packed with the water source unit. Accessories Adapters at HP gas side Φ19.05→Φ15.88 Pipe Adapters at LP Access- gas side ories Φ25.4→Φ28.6 Φ25.4→Φ28.6 Φ25.4→Φ28.6 Φ19.05→Φ22.2 Adapter at liquid side Φ15.88→Φ12.7 ID: Inner Diameter... -
Page 15: Necessary Tools And Instrument List For Installation
Line-Up of Water Source Units This water source unit series consists of models 76-190. The water source unit can be used as either heat pump system or heat recovery system. 3.2.1 Heat Pump System Capacity Model AVWW-76FKFW AVWW-96FKFW AVWW-114FKFW AVWW-136FKFW Capacity Model... -
Page 16: Water Source Unit Installation
4. Water Source Unit Installation Installation Location and Precautions Install the water source unit to indoors. It is recommended that the water source unit be installed in a mechanical room, to prevent weather damage. To reduce the risk of serious injury or death, the following installation precautions must be followed. -
Page 17: Service And Installation Space
Service and Installation Space Install the water source unit with sufficient space around it for operation and maintenance access as shown in the following figures. ● Service and Installation Spaces Secure the service space when replacing parts or service maintenance access. Single installation with refrigerant pipes from front side piping cover and drain pipe from front side of unit. - Page 18 Multiple installation with drain pipe from front side of unit. Unit: mm Top View * Provide minimum of 500mm space for drain pipe from rear side of unit. Unit: mm Model 76, 96, 114 and 136 154, 170 and 190 1040...
- Page 19 Suspending Method (1) Suspend the unit (with wooden skid base) in its packing with two sling belts as shown in Figure 5.1. (2) Do not use banding wire. (3) Ensure that the unit is balanced. (4) Ensure safety while hoisting the unit gently to prevent the unit from tipping over. Angle of sling belts is more than 60°.
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Page 20: Transportation And Installation Work
5. Transportation and Installation Work Handling of Water Source Unit Do not place or leave any foreign objects: (cables, tools), inside the water source unit or control module and verify that nothing remains there prior to installation and test run. Damage and fire can result due to carelessness. Installation Work 5.2.1 Concrete Foundations (1) The height of the foundation should be more than 150mm above the ground. (2) Provide adequate drainage around the foundation. Unit: mm Details of Installing Anchor Bolt Min. - Page 21 (3) Install the water source unit in the front-rear and right-left direction horizontally. (Use a level.) Verify that the gradient slope in all four directions (front, rear, right, and left) falls within 10mm. The unit should be installed so that the front (or back) side of the unit is slightly (0 to 5mm) lower than the back (or front) side to allow and promote condensate drainage.
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Page 22: Water Piping Work
6. Water Piping Work Piping Connection Example of basic water piping connection to the water source unit is shown below. Recommendation Water Flow Automatic Air (Not Mandatory) Service Port Switch Discharge Valve (For cleaning heat exchanger) Thermometer Flexible Connection Gate Valve Water Source Gate Valve... - Page 23 ● It is recommended to install thermometer and pressure gauge at the water inlet and outlet side of water source unit for easy service. ● It is recommended to utilize flexible connections to the water inlet and outlet side of water piping, so that vibration is not transmitted and prevent piping crack.
- Page 24 ● Water pressure resistance of the water piping of this water source unit is 1.96 MPa. ● Water piping size to the unit should not be less than that of pipe joint on the unit. ● Select the water piping according to local or national regulation. ●...
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Page 25: Water Flow Rate And Pressure Drop
Water Flow Rate and Pressure Drop Water Flow Rate and Pressure Drop Select the water pump (field-supplied) according to the following table Model Rated Water Flow Rate 4.60 5.76 6.90 8.30 9.20 10.00 11.60 Maximum Allowable Water 3.04 3.80 4.55 5.48 6.07 6.60... -
Page 26: Water Flow Control
Water Flow Control Water source unit is damaged if it is operated with no water circulating through the water piping. It is necessary to provide the water flow switch (field-supplied) on water outlet side of water piping within approximately 1~2m from each water source unit to realize stop protection. If water flow switch is open while the water source unit is operating, “A2”... -
Page 27: Water Quality Requirements
Water Quality Requirements • Water source unit must be used with closed type cooling tower. Open type cooling tower will face poor quality-water, corrosion and sediment. Be sure to check the water pipeline construction, water quality monitoring and water treatment. •... -
Page 28: Maintenance Of Water Circuit
Maintenance of Water Circuit If the water pressure difference at the water inlet and outlet sides of the plate heat exchanger is higher compared to during Test Run, the water strainer may be clogged. Be sure to regularly clean the water strainer according to the clogging degree and check the water flow rate (or pressure drop). -
Page 29: Refrigerant Piping Work
7. Refrigerant Piping Work • The pressure for this product is 4.15MPa. The pressure required for refrigerant R410A is 1.4 times higher than the refrigerant R22. Therefore, the refrigerant pipes for R410A must be thicker than that for R22. Make sure to use specified refrigerant pipes. Otherwise, the refrigerant pipes may rupture due to an excessive refrigerant pressure. Pay close attention to the pipes thickness when using copper refrigerant pipes. - Page 30 Brazing Work (1) Brazing work must be performed by an authorized installer. (2) For refrigerant pipe connections, perform non-oxidation brazing with a nitrogen purge. If refrigerant piping is brazed without nitrogen, a large amount of oxidized scaling is generated in the piping. This oxidized scaling will cause clogging inside the expansion valve, solenoid valve, accumulator, and compressor, which will prevent the unit from operating properly.
- Page 31 (4) When the temperature and humidity inside the ceiling exceed 27 C/RH80%, apply additional insulation of approximately 10mm in thickness to the existing insulation. The insulation prevents the formation of condensation on the surface of the insulation (refrigerant pipe only). (5) Perform a leak test at 4.15MPa.
- Page 32 Table 7.1 Piping Sizes of Water Source Unit Model: AVWW-FKFW (2 Pipes) Model Liquid 76/96 9.53 19.05 114/136 22.20 12.70 22.20 15.88 154-190 Model: AVWW-FKFW (3 Pipes) Liquid Model Low Pressure High/Low Pressure 76/96 19.05 19.05 9.53 114/136 22.20 12.70 25.40 25.40 22.20...
- Page 33 Piping Connection Work Comply with the restrictions for refrigerant piping (permissible length, height difference) in “Piping Work Conditions” and “Piping Branch Restriction” under Section 7.4 or the water source unit can become damaged or fail. The stop valves are closed (factory-setting) when refrigerant piping connections are performed. Do not open these stop valves until all the refrigerant pipes are connected, pressure tested, and evacuated.
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Page 34: Piping Connection Method
7.2.2 Piping Connection Method Perform the refrigerant piping connection work for each water source unit. NOTICE: Ensure that the refrigerant pipe is connected to the same refrigerant system. ● Firmly secure the pipe in order to avoid vibration, excessive force on the valve and noise. (1) Piping can be installed from the front side cover. - Page 35 ● Details of Stop Valve Piping Connections Be sure to remove first the closing pipe (piping cap) of the gas and liquid stop valves. Refer to Section 3. “Factory-Supplied Accessories” for the details of the accessory pipes. Heat Pump System with refrigerant pipes from front side Accessory Direct Connection Pipe...
- Page 36 Heat Recovery System with refrigerant pipes from front side Direct Connection Accessory Pipe (for Low Pressure Gas Line) (for Low Pressure Gas Line) Accessory Pipe Direct Connection (for High/Low Pressure Gas (for High/Low Pressure Gas Line) Line) Stop Valve Stop Valve (for Low Pressure Gas) (for Low Pressure Gas) Stop Valve...
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Page 37: Piping Sizes From Water Source Units
Piping Sizes from Water Source Units Install the water source unit and piping connections in accordance to whatever is applicable to your situation. Refer to the table for the water source unit model, the piping connection kit model, and the pipe diameter. 7.3.1 Heat Pump System (mm) Water Source Unit... -
Page 38: Electrical Wiring
When shielded cable is applied, secure properly and terminate cable shield as required per Hisense guidelines. Plenum and riser ratings for communication cables must be considered per application and local code requirements. -
Page 39: General Check
When shielded cable is applied, secure properly and terminate cable shield as required per Hisense guidelines. Plenum and riser ratings for communication cables must be considered per application and local codes where: •... - Page 40 (1) Power Supply Wiring Supply power supplies to each water source unit and indoor unit group respectively. Using this method is a basic principle of power supply wiring. Heat Pump System ELB(Earth Leakage Breaker) S (Main Switch and Fuse) Water Source Unit Power Supply Power Supply Wiring (W.S.) AC 3N~ 380-415V 50/60Hz Ground Wiring (W.S.)
- Page 41 EMI and other sources of potentially excessive electrical noise to reduce the potential for communication errors. When shielded cable is applied, secure properly and terminate cable shield as required per Hisense guidelines. Plenum and riser ratings for communication cables must be considered per application and local code requirements.
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Page 42: Electrical Wiring For Water Flow Control
Install a multi-pole main switch with a space of 1/8 inch (3.5mm) or more between each phase. ATTENTION: 1. When the power supply wiring is longer, select the minimum wiring size that has a voltage drop within 2%. 2. Power supply voltage should be satisfied with the followings. Supply Voltage: Rated Voltage within +10% Starting Voltage: Rated Voltage within -15% Operating Voltage: Rated Voltage within +10%... -
Page 43: Connection For Water Pump
8.3.2 Connection for Water Pump If “Valve/Pump Operation Request” output signal is used for water pump, separate external power supply to operate water pump is required. NOTE: Do not use terminal block 3 (TB3) terminals No.5-6 to supply power for the water pump. Otherwise, serious accident and malfunction of the water source unit may result. -
Page 44: Connection For Water Flow Switch
TB2 terminals 3 and 4 on the PCB1. When shielded cable is applied (M4), secure properly and terminate cable shield as required per Hisense guidelines. Plenum and riser ratings for communication cables must be considered per application and local code. - Page 45 Above figure illustrate the example of a small cabinet. (1) Detail of Terminal Block for Power Supply Wiring (TB1)
- Page 46 (2) Detail of Terminal Block for Communication Cable (TB2) ˜ Do not connect the main power supply wiring to the communication line (Terminals 1, 2, 3 and 4 of TB2). If these are connected, the PCB1 will be destroyed. PCB1 Screw (M3.5) For W .S.Combination F H INK...
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Page 47: Electrical Wiring Connections Of Indoor Unit, Water Source Unit And Switch Box
When shielded cabling is applied, secure properly and terminate cable shield as required per Hisense guidelines. Plenum and riser ratings for communication cables must be considered per application and local code requirements. - Page 48 (8) Connect the following communication cables to the terminals 1 and 2 on terminal block (TB2) in the water source unit A (main unit). • between water source unit and indoor unit • between water source unit and switch box •...
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Page 49: Piping Size And Multi-Kit Selection
Water Source Unit A (Main) L1 L2 L3 1 2 3 4 Ground Main Switch TB : Terminal Block PCB : Printed Circuit Board : Field Wiring : Communication Line DC5V (Non-Pole Communication HI-NET System) : Optional Part (Field Supplied) : Optional Accessory 380-415V 50/60Hz... -
Page 50: Function Setting
8.6 Function Setting External Input/Output and Function Setting Make sure to perform external input/output and function setting while Water Source Unit is stopped. It cannot be set while Water Source Unit is operating or check mode. [ External Input/Output Setting ] [ Function Setting ] Start of Setting Start of Setting... -
Page 51: Additional Refrigerant Charge
9. Additional Refrigerant Charge Leak Test (1) Check to ensure that the stop valves for high/low pressure gas, low pressure gas and liquid pipes are closed completely before leak testing. (2) The refrigerant used for this water source unit is R410A. Use the manifold gauge and the charging hose for exclusive use of R410A. - Page 52 Airtight Test Method (1) Connect the manifold gauge to the access port of the liquid line and the gas line stop valves using charging hoses with a vacuum pump or a nitrogen cylinder. Perform the airtight test. Do not open the stop valves. Apply nitrogen gas pressure of 4.15MPa. For checking gas leakage, use the leak detector or foaming agent.
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Page 53: Heat Recovery System
Insulation Work for Refrigerant Piping (1) Securely insulate the high/low pressure and low pressure (for heat recovery system only) gas piping side and liquid piping side individually. Make sure to insulate the union flare nut for the piping connection as well. (2) Seal the gap between the bottom base or front piping cover and pipes with the insulation. -
Page 54: Vacuuming
Vacuuming Connecting Connect a manifold gauge, vacuum gauge and vacuum pump to the following access ports. High/Low Pressure Gas Stop Valve Heat Pump System Liquid Stop Valve High/Low Pressure Gas Stop Valve Heat Recovery System Low Pressure Gas Stop Valve Liquid Stop Valve Triple Evacuation Method According to the following <... -
Page 55: Charging Work
Charging Work (1) An additional refrigerant charge is required according to total piping length. Refer to Table 9.1. (2) After vacuum pumping work, check that the high/low pressure gas valve (low pressure gas valve is for heat recovery system only), and liquid stop valve are fully closed. Charge the additional refrigerant from the access port of liquid stop valve (acceptable error must be within 0.5 kg). - Page 56 Heat Pump System Water Source Unit Nitrogen Tank (for Nitrogen Blow during Brazing and Airtight Test) Stop Valve (Gas Line) Manifold Gauge Stop Valve (Liquid Line) Siphon Refrigerant Cylinder (R410A) Vacuum Pump Scale Liquid Line Gas Line Indoor Unit Multi-Kit Insulation [Cover the gas and liquid pipe with insulation.] Heat Recovery System...
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Page 57: Additional Refrigerant Charge Calculation
Additional Refrigerant Charge Calculation Table 9.1 Additional Refrigerant Charge Calculation Although this unit has been charged with refrigerant, an additional refrigerant charge is required. Determine what additional charge of refrigerant according to the following procedures, and charge it into the system. - Page 58 Maximum Additional Refrigerant Charge Quantity Allowed [kg] Water Source Unit Capacity 76, 96 136, 154, 170 Maximum Additional Refrigerant Charge [kg] 28.0 36.0 40.0 48.0 Initial Refrigerant Charge Amount of W.S. (Before Shipment) W0 [kg] Water Source Unit Capacity 76, 96 114, 136 170, 190 W0 Water Source Unit Refrigerant Charge [kg]...
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Page 59: Test Run
10. Test Run Test Run should be performed in accordance with Sections 10.2 and 10.3. Use Table 10.1 for recording the Test Run. An electrical shock will occur if there is residual voltage. Turn OFF power at the power supply completely before attempting any electrical maintenance work. Verify that no residual voltage exists after turning OFF the power at the power supply. -
Page 60: Multi-Kit Connection
Caution for Insulation Resistance If the total unit insulation resistance is lower than one megaohm, the compressor insulation resistance may be lower, due to refrigerant being retained in the compressor. This can occur if the unit has not been used over prolonged periods of time. 1. -
Page 61: Test Run For Water Source Unit
10.3 Test Run for Water Source Unit This test run method is for the wired controller. As for other controllers, refer to Installation and Maintenance Manual attached to each controller. (1) For heat pump system, check to ensure that stop valves for high/low pressure gas and liquid of the water source units are fully opened. - Page 62 (f) According to the label “Checking Method by Seven-Segment Display” attached to the back side of the service cover of the water source unit, check the temperature, the pressure and the operation frequency of the specified portions, and check the number of the connected indoor units on 7-segment displays.
- Page 63 DIP Switch Setting Operation Remarks 1. Setting of Operation Mode 1. The indoor unit automatically * Note that indoor units operate in starts operating when the test run conjunction with the test run operation Cooling: Set No.2 pin of DSW4 OFF. of the water source unit is set.
- Page 64 Table 10.1 Test Run and Maintenance Record MODEL: SERIAL. No. COMPRESSOR MFG. No. CUSTOMER'S NAME AND ADDRESS: DATE: THE RESULT OF ALL PERIODIC ROUTINE TESTS: 1. Is the rotation direction of the indoor fan correct? 2. Is the water source unit inlet and outlet water pipe connection correct? 3.
- Page 65 Table 10.2 Alarm Code Code Category Content of Abnormality Leading Cause Activation of Protection Device Activation of Float Switch (High Water Level in Drain Pan, Indoor Unit (Float Switch) Abnormality of Drain Pipe, Float Switch, or Drain Pan) Water Source Activation of Protection Device Activation of PSH (Pipe Clogging, Excessive Refrigerant, Unit...
- Page 66 Code Category Content of Abnormality Leading Cause Abnormality of Water Source Unit Water Source Unit Capacity > 190 Capacity Incorrect setting of outdoor unit (model Difference of voltage setting between master unit and slave unit combination or voltage) Water Source In the case where the communication with sub unit is unavailable Unit Abnormal transmission between main...
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Page 67: Safety And Control Device Setting
(1) High Pressure Switch: This switch cuts out the operation of the compressor when the discharge pressure exceeds the setting. (2) Oil Heater: This band type heater protects against oil foaming during cold starting, as it is energized while the compressor is stopped. Model AVWW-76FKFW AVWW-96FKFW AVWW-114FKFW AVWW-136FKFW AVWW-154FKFW... - Page 68 The above performance data is obtained on the basis of the performance of this outdoor unit, Note with a 100%-combination of ceiling ducted type indoor units. Qingdao Hisense Hitachi Air-conditioning Systems Co., Ltd. Contact details 218,Qianwangang Road, Economic and Technological Development Zone, Qingdao, P.R. China...
- Page 69 Pipe Accessories Bag: 1 pc Water Flow Switch: 1 pc Operation Installation & Maintenance Manual: 1 pc 1110154 Qingdao Hisense Hitachi Air-conditioning Systems Co., Ltd. Add: 218, Qianwangang Road, Economic & Technical Development Zone, Qingdao, P.R. China http://www.hisense-vrf.com E-mail：export@hisensehitachi.com M00261Q 2018.09...