Related Manuals for Hitachi YUTAKI M RASM-3WF2E
Summary of Contents for Hitachi YUTAKI M RASM-3WF2E
- Page 1 – INSTALLATION AND OPERATION MANUAL – YUTAKI M R32 SERIES MODELS MONOBLOC SYSTEM RASM-(3/4)WF2E PMEN0657 rev.0 - 02/2024...
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Page 2: Table Of Contents
Contents General Information .....................6 Name of parts and dimensional data ..............10 Electrical data .....................12 Working range ....................14 Drain and water piping ..................19 Electrical and control settings ................37 Commissioning ....................59 Maintenance.......................66 PMEN0657 rev.0 - 02/2024... - Page 3 General Index 1. General Information ....................6 1.1 General information ..................7 1.2 Applied Symbols ....................7 1.3 Product guide ....................8 1.3.1 Classification of the units ................8 1.4 Product list ......................9 1.4.1 Unit Controller Accessory ................9 2. Name of parts and dimensional data ...............10 2.1 RASM-(3/4)WF2E .....................11 3. Electrical data ......................12 3.1 Considerations ....................13...
- Page 4 5.2 Hydraulic Connections ..................20 5.3 Space heating and DHW .................22 5.3.1 Additional hydraulic necessary elements for space heating ....22 5.3.2 Additional hydraulic necessary elements for DHW ......23 5.3.3 Additional hydraulic optional elements (for DHW) .......25 5.3.4 Requirements and recommendations for the hydraulic circuit ....26 5.3.5 Anti-freezing protection for water circuit ..........27 5.3.6 Glycol as anti-freezing protection ............27 5.3.7 Insulation ....................29...
- Page 5 6.2.1.5 DSW5 ..................53 6.2.1.6 DSW6 ..................53 6.2.1.7 DSW7 ..................53 6.2.1.8 LED indication ................53 6.2.2 Water cycle PCB ..................54 6.2.2.1 DSW1 ..................54 6.2.2.2 DSW2 ..................54 6.2.2.3 DSW3 ..................54 6.2.2.4 DSW4 ..................55 6.2.2.5 DSW5 ..................56 6.2.2.6 DSW6 (only if available) ............56 6.2.2.7 DSW7 ..................57 6.2.2.8 DSW15 & RSW2 ................57 6.2.2.9 DSW16 & RSW1 ................57 6.2.2.10 DSW18 ..................57 6.2.2.11 SSW1 ..................58 6.2.2.12 SSW2 ..................58 6.2.2.13 LED indication .................58...
- Page 6 7.3 Commissioning procedure ................62 7.4 Test run / air purge ..................63 8. Maintenance ......................66 8.1 Removing the service cover ................67 8.2 Removing the upper cover ................68 8.3 Removing the rear cover .................69 PMEN0657 rev.0 - 02/2024...
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Page 7: General Information
General Information 1.1 General information ..................7 1.2 Applied Symbols ....................7 1.3 Product guide ....................8 1.3.1 Classification of the units ................8 1.4 Product list ......................9 1.4.1 Unit Controller Accessory ................9 PMEN0657 rev.0 - 02/2024... -
Page 8: General Information
This document may therefore have been subject to amendments during the life of the product. Hitachi makes every effort to offer correct, up-to-date documentation. Despite this, printing errors cannot be controlled by Hitachi and are not its responsibility. -
Page 9: Product Guide
In the texts following the danger symbol you can also find information on safety procedures during unit installation. CAUTION • The text following this symbol contains information and instructions relating directly to your safety, in addition to hazards or unsafe practices which could result in minor personal injury or product or property damage. -
Page 10: Product List
1.4 Product list Icons between brackets mean possible extra operations to the factory-supplied operations (additional accessories, field supplied accessories or systems can be needed). Heating operation Cooling operation Additional heater (electrical heater accessory or boiler) Domestic Hot Water (DHW) Swimming pool application Solar combination ‹... -
Page 11: Name Of Parts And Dimensional Data
Name of parts and dimensional data 2.1 RASM-(3/4)WF2E .....................11 PMEN0657 rev.0 - 02/2024... -
Page 12: Rasm-(3/4)Wf2E
2.1 RASM-(3/4)WF2E Compressor Safety valve Water side heat exchanger Expansion vessel Air side heat exchanger Switch for DHW “emergency” Economizer operation Electrical box Sensor for refrigerant pressure Fan (x2) (Pd) Expansion valve (x3) Sensor for refrigerant pressure Reversing valve (Ps) Solenoid valve (SVA) Ambient thermistor Solenoid valve (SVC) -
Page 13: Electrical Data
Electrical data 3.1 Considerations ....................13 PMEN0657 rev.0 - 02/2024... -
Page 14: Considerations
• The compressor data shown in the tables below are based on a combined capacity of 100% of the power supplied. • Specifications in these tables are subject to change without notice in order that Hitachi may bring the latest innovations to their customers. -
Page 15: Working Range
Working range 4.1 Power supply working range ................15 4.2 Temperature working range ................15 4.2.1 Space heating ..................15 4.2.2 DHW .......................16 4.2.3 Swimming pool heating .................16 4.2.4 Space cooling ..................17 4.3 Hydraulic working range ..................17 4.3.1 Hydraulic data ..................17 4.3.2 Pump performance curves ..............18 PMEN0657 rev.0 - 02/2024... -
Page 16: Power Supply Working Range
4.1 Power supply working range ◆ Nominal power supply ~ 230V 60Hz ◆ Operating voltage Between 90 and 110% of the nominal voltage. ◆ Starting voltage Always higher than 85% of the nominal voltage. ◆ Relative humidity limit ... -
Page 17: Dhw
4.2.2 DHW 167(75) 149(65) Continuous working range 131(55) 116.6 (47) 113 (45) Tank heater only 95(35) 86(30) 77(25) (-25) (35) (40) (50) (-30) (-20) (-10) (10) (20) (25) (30) Ambient temperature °F (°C) NOTE Area marked with only available if DHW tank back-up heater is enabled. 4.2.3 Swimming pool heating Continuous working range 104 (40) -
Page 18: Space Cooling
4.2.4 Space cooling Continuous working range 77 (25) 71.6 (22) 68 (20) Refreshing floor working area 60.8 (16) 59 (15) Fan coil 50 (10) working area 41 (5) 32 (0) 114.8 (46) (10) (30) (35) (45) (55) (25) (15) Ambient temperature °F (°C) 4.3 Hydraulic working range 4.3.1 Hydraulic data MODEL... -
Page 19: Pump Performance Curves
4.3.2 Pump performance curves NOTE If a water flow rate is selected out of the working range of the unit, it can cause malfunction on the unit. Please, try to operate the pump within the minimum and maximum water flow. 3 RT 4 RT 26.2 (8) 26.2 (8) -
Page 20: Drain And Water Piping
Drain and water piping 5.1 Outdoor Unit Draining Operation ..............20 5.2 Hydraulic Connections ..................20 5.3 Space heating and DHW .................22 5.3.1 A dditional hydraulic necessary elements for space heating ....22 5.3.2 A dditional hydraulic necessary elements for DHW ......23 5.3.3 A dditional hydraulic optional elements (for DHW) .......25 5.3.4 Requirements and recommendations for the hydraulic circuit ....26 5.3.5 Anti-freezing protection for water circuit ..........27 5.3.6 Glycol as anti-freezing protection ............27 5.3.7 Insulation ....................29 5.3.8 Water filling ...................30 5.3.9 Water quality ..................32 5.4 Minimum water volume description ...............33 5.5 Water piping ....................35 5.5.1 Water piping length .................35 5.5.2 Water piping size ...................36... -
Page 21: Outdoor Unit Draining Operation
5.1 Outdoor Unit Draining Operation YUTAKI M has no drain port factory supplied. It is highly recommended to install a drain port valve attached to the water outlet of the YUTAKI M unit in order to ease the operation of draining. When the drain port is installed the draining procedure for the YUTAKI M follows the next steps: 1 Switch OFF the main power of the unit. - Page 22 Item Nature Part Name Field supplied Shut-off valve Field supplied Water check valve Field supplied Pressure relief valve Field supplied Draining Field supplied Shut-off valve Field supplied Water check valve Field supplied Water pump Field supplied Shut-off valve Field supplied Shut-off valve Field supplied Shut-off valve...
- Page 23 5.3 Space heating and DHW DANGER Do not connect the power supply to the unit prior to filling the space heating circuit (and DHW circuit if it were the case) with water and checking water pressure and the total absence of any water leakage.
- Page 24 5.3.2 Additional hydraulic necessary elements for DHW Nature Nº Part name Water inlet (Space heating) Water outlet (Space heating) Heating coil inlet Piping connections Heating coil outlet Water inlet (DHW) Water outlet (DHW) Shut-off valve Domestic hot water tank Field supplied 3-way valve T-branch Heating coil pipes...
- Page 25 ◆ Elements to install in the DHW tank Additionally, the following elements are required for the DHW circuit: Nature Nº Part name Water inlet (DHW) Piping connections Water outlet (DHW) Pressure and temperature relief valve Shut-off valve Water check valve Field supplied Pressure relief valve Shut-off valve...
- Page 26 5.3.3 Additional hydraulic optional elements (for DHW) In case of a recirculation circuit for the DHW circuit: Nature Nº Part name Water inlet (DHW) Piping connections Water outlet (DHW) Water check valve Field supplied Water pump Shut-down valve PMEN0657 rev.0 - 02/2024...
- Page 27 5.3.4 Requirements and recommendations for the hydraulic circuit • The maximum piping length depends on the maximum pressure availability in the water outlet pipe. Please check the pump curves “4.3.2 Pump performance curves”. • The units are equipped with a manual air purger (factory supplied) at the highest location of the unit.
- Page 28 5.3.5 Anti-freezing protection for water circuit ◆ Anti-freezing protection Frost can damage the system. To prevent components from freezing, software has been designed with special frost protection functions, that include the activation of pump & heater in case of low temperatures (see Service Manual Water pump control).
- Page 29 On graphic below, required concentration depending on outside temperature is shown. Frost protection 32(0) 23(-5) 14(-10) 5(-15) -4(-20) -13(-25) -22(-30) -31(-35) -40(-40) -49(-45) -58(-50) % Volume propylene glycol coolant Burst point acc. to DIN51583 Frost protection Freezing point according to ASTM D1177 Frost protection 32(0) 23(-5)
- Page 30 be still frozen). CAUTION • Do not add glycol that has been exposed to air as glycol absorbs water from the environment. Final glycol concentration can be lower than expected, allowing system to freeze up. • Corrosion, that can damage gravely the system, is possible when glycol is added. Uninhibited glycol with oxygen can become acidic &...
- Page 31 5.3.8 Water filling 1 Check that a water check valve (field supplied) with a shut-off valve (field supplied) is connected to the water filling point (water inlet connection) for filling the space heating hydraulic circuit (see “5.1 Outdoor Unit Draining Operation”). 2 Make sure all the valves are open (water inlet/outlet shut-off valves and the rest of valves of the space heating installation components).
- Page 32 NOTE • The unit is equipped with a manual air purger (factory supplied) at the highest location of the unit. Anyway, if there are higher points in the water installation, air might be trapped inside water pipes, which could cause system malfunction. In that case, additional air purgers (field supplied) should be installed to ensure no air enters into the water circuit.
- Page 33 Using filling water that does not meet the stated quality requirements can cause a considerably reduce in service life. The responsibility will be out of Hitachi warranties. The following water quality minimum requirement:...
- Page 34 As DHW Tank water is being used for storing drinking water, this water has to be in accordance with national regulations and Hitachi’s quality minimum requirements. The use of softeners, active anodes or other protective systems will not bring a derogation from Hitachi’s provided warranty. 5.4 Minimum water volume description The following part shows how to calculate the minimum water volume in the system for product protection (anti-hunting) and temperature drop at defrosting.
- Page 35 1 Minimum required water volume during defrosting The following formula is used to make the calculation: Where: V = Required water volume (m 360 x Q ΔT = Permissible water temperature drop (°C) ΔT x 4168.8 = Heat loss during defrosting (kW) = Heat demand from the installation (kW) = Cooling load on the YUTAKI M (kW) V = Required water volume(ft...
- Page 36 The following table shows the minimum water volume needed in each unit. 3 RT 4 RT Water temperature drop Volume gal (L) 9 °F (5 °C) 92 (350) 109 (414) 18 °F (10 °C) 46 (175) 54 (207) 27 °F (15 °C) 30 (117) 36 (138) 36 °F (20 °C)
- Page 37 5.5.2 Water piping size ◆ Piping location The unit is factory supplied with two unions to be connected to the water inlet/outlet pipe. Refer to the next figure detailing the location of the water pipes location. Water inlet Water outlet 1.29 (33) 5.90 3.93...
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Page 38: Electrical And Control Settings
Electrical and control settings 6.1 Optional unit wiring for accessories ..............39 6.1.1 Summary of the terminal board connections ........39 6.1.2 Input terminals (Default input functions) ..........41 6.2 Setting of DIP switches and RSW switches ............50 6.2.1 Refrigerant cycle PCB ................51 6.2.1.1 DSW1 ..................51 6.2.1.2 DSW2 ..................52 6.2.1.3 DSW3 ..................52 6.2.1.4 D SW4 / RSW1 ................52 6.2.1.5 D SW5 ..................53 6.2.1.6 DSW6 ..................53 6.2.1.7 DSW7 ..................53 6.2.1.8 LED indication ................53 6.2.2 Water cycle PCB ..................54 6.2.2.1 DSW1 ..................54 6.2.2.2 DSW2 ..................54 6.2.2.3 DSW3 ..................54 6.2.2.4 DSW4 ..................55... - Page 39 6.2.2.11 SSW1 ..................58 6.2.2.12 SSW2 ..................58 6.2.2.13 LED indication .................58 PMEN0657 rev.0 - 02/2024...
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Page 40: Optional Unit Wiring For Accessories
6.1 Optional unit wiring for accessories 6.1.1 Summary of the terminal board connections < > Mark Part name Description TERMINAL BOARD 1 (TB1) ~ 230V 60Hz Main power supply connection TERMINAL BOARD 2 (TB2) H-LINK communication The H-LINK transmission for service purpose H-LINK communication for Terminals for the connection of the YUTAKI unit controller. - Page 41 Mark Part name Description Available input for an instantaneous heating of the domestic hot water of Input 6 (DHW boost) (*) the tank. The measuring of the real power consumption can be done connecting an external power meter. The number of pulses of the power meter is Input 7 (Power meter) a variable which must be set.
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Page 42: Input Terminals (Default Input Functions)
6.1.2 Input terminals (Default input functions) ◆ Room thermostat communication cables Optional wireless ON/OFF room thermostat The heat pump system has been designed to allow the connection of a remote ON/OFF thermostat to effectively control the home temperature. Depending on the room temperature, the thermostat will turn the system to ON or OFF. - Page 43 ◆ Unit controller connection In those cases where the unit controller is ordered as a required accessory, or those cases where another unit controller must be connected as a second thermostat, the connections between unit controller and the indoor unit must be done in terminals 3 and 4, as it is shown in the next picture: RCS H-LINK ◆...
- Page 44 ◆ Water outlet thermistor for circuit 2 (TWO2) When the installation is configured with a second circuit the thermistor for the water outlet temperature have to be connected between terminals 6 and 7 of the terminal board 2. Circuit 2 ◆...
- Page 45 ◆ Second ambient temperature thermistor (TAMB2) To control the second ambient temperature. The thermistor should be positioned outdoors and have to be connected between terminals 9 and 11 of the terminal board 2. AMB2 AuxSensor3 ◆ ECO (Default for input 2) ...
- Page 46 ◆ Solar (Default for input 4) This input comes from a solar panel sensor. The solar combination by input demand allows HSW to be heated by solar system when there is enough solar energy available. The connection of this input signal has to be done between terminals 16 and 18 at TB2.
- Page 47 ◆ Power Meter (Default for input 7) This function is used to monitor real consumption of the system by means an external power meter device connected at this input. The calculation method is done by measuring real consumption of the whole installation with one power meter device or 2 separate power meter (one for indoor unit and another one for outdoor unit).
- Page 48 Output terminals (Default output functions) ◆ Mixing valve for Circuit 2 The mixing valve is controlled to maintain the second heating temperature at the second heating temperature set point. The control system decides how much to open or close the mixing valve to achieve the desired position of the valve.
- Page 49 ◆ 3 Way valve for DHW tank output YUTAKI units can be used to heat DHW. The signal is used on a 3-way motorized diverting valve and to provide control of supply water flow (water flow for space heating when there is no signal, and water flow for DHW when signal is ON) (L1) (L2)
- Page 50 ◆ Auxiliary boiler or heater (Default for Output 3) The auxiliary boiler or heater can be used when the heat pump cannot achieve the require temperature by itself. Auxiliary Heat (Output 3) ◆ Solar (Default for output 4) This output is used when solar mode is enabled (from Unit controller) and the temperature in the solar panel rises above the water temperature in the domestic hot water tank (DHWT).
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Page 51: Setting Of Dip Switches And Rsw Switches
6.2 Setting of DIP switches and RSW switches NOTE • The mark “■” indicates the DIP switches positions. • No mark “■” indicates pin position is not affected. • The figures show the settings before shipment or after selection. • “Not used” means that the pin must not be changed. A malfunction might occur if changed. CAUTION Before setting DIP switches, first turn the power supply OFF and then set the position of DIP switches. -
Page 52: Refrigerant Cycle Pcb
6.2.1 Refrigerant cycle PCB 6.2.1.1 DSW1 ◆ Cancellation of electric current detection DSW1 RASM-(3/4)WF2E Factory setting When set pin to ON, the electric current detection is cancelled. Pin should be set back to OFF after electrical work. ◆ Test run mode ... -
Page 53: Dsw2
6.2.1.2 DSW2 ◆ Optional Function setting DSW2 RASM-(3/4)WF2E Factory setting Function selection setting mode External input, output setting mode ◆ Not used DSW2 RASM-(3/4)WF2E Factory setting 6.2.1.3 DSW3 ◆ Capacity Setting (No setting is required) DSW3 Factory setting RASM-3WF2E RASM-4WF2E 6.2.1.4 ... -
Page 54: Dsw5
6.2.1.5 DSW5 ◆ Terminal resistance DSW5 RASM-(3/4)WF2E Factory setting Fuse recovery Not applicable 6.2.1.6 DSW6 ◆ No setting is required DSW6 RASM-(3/4)WF2E Factory setting 6.2.1.7 DSW7 ◆ Function selection DSW7 RASM-(3/4)WF2E Factory setting Open valves (when DSW1 for test run pin 4 is switched ON) 6.2.1.8 LED indication Name Colour... -
Page 55: Water Cycle Pcb
6.2.2 Water cycle PCB 6.2.2.1 DSW1 ◆ Additional setting 1 DSW1 RASM-(3/4)WF2E Factory setting Cooling mode available 6.2.2.2 DSW2 ◆ Unit capacity setting DSW2 Factory setting RASM-3WF2E RASM-4WF2E 6.2.2.3 DSW3 ◆ Additional setting 1 DSW3 RASM-(3/4)WF2E Factory setting PMEN0657 rev.0 - 02/2024... -
Page 56: Dsw4
6.2.2.4 DSW4 ◆ Additional setting 2 DSW4 RASM-(3/4)WF2E Factory setting DHW defrost Heater forced OFF Unit and installation pipes antifreeze protection Standard / ECO water pump operation Electric heater or boiler emergency mode DHW tank’s heater operation DHW 3-way valve forced ON CAUTION •... -
Page 57: Dsw5
6.2.2.5 DSW5 ◆ Additional setting 3 DSW5 RASM-(3/4)WF2E Factory setting Outdoor unit sensor for circuits 1 and 2. Outdoor unit sensor for circuit 1; Auxiliary sensor for circuit 2. Auxiliary sensor for circuit 1; Outdoor unit sensor for circuit 2. Auxiliary sensor instead of outdoor unit sensor for both circuits. -
Page 58: Dsw7
6.2.2.7 DSW7 ◆ Not used DSW7 RASM-(3/4)WF2E Factory setting 6.2.2.8 DSW15 & RSW2 ◆ Refrigerant cycle address DSW15 & RSW2 RASM-(3/4)WF2E Factory setting 6.2.2.9 DSW16 & RSW1 ◆ Not used DSW16 & RSW1 RASM-(3/4)WF2E Factory setting (Do not change) 6.2.2.10 DSW18 ◆... - Page 59 6.2.2.11 SSW1 ◆ Remote/Local SSW1 RASM-(3/4)WF2E Remote Factory setting Local 6.2.2.12 SSW2 ◆ Heat/Cool SSW2 RASM-(3/4)WF2E Heat Factory setting (Heat operation in case of Local) Cool Heat Cool operation in case of Local Cool 6.2.2.13 LED indication Name Colour Indication LED1 Green Power indication LED2...
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Page 60: Commissioning
Commissioning 7.1 Before operation ....................60 7.2 Preliminary check ....................60 7.2.1 Checking the unit ...................60 7.2.2 Electrical checking .................60 7.2.3 Hydraulic circuit checking (space heating and DHW) ......61 7.2.4 Checking the refrigerant circuit .............61 7.2.5 Test and check ..................62 7.3 Commissioning procedure ................62 7.4 Test run / air purge ..................63 PMEN0657 rev.0 - 02/2024... -
Page 61: Before Operation
7.1 Before operation CAUTION • Supply electrical power to the system for approximately 12 hours before start-up after a long shut-off. Do not start the system immediately after power supply, it may cause compressor failure because the compressor is not well-heated. •... -
Page 62: Hydraulic Circuit Checking (Space Heating And Dhw)
specifications given in this document, and check that the components comply with national and local standards. • Do not touch any electrical components for more than three minutes after turning OFF the main switch. • Check the DIP switch settings of the unit are connected as shown in the chapter “6.2 Setting of DIP switches and RSW switches”. -
Page 63: Test And Check
7.2.5 Test and check Finally, test and check the following items: • Water leakage • Refrigerant leakage • Electrical connection NOTE Please refer to the chapters of “5.4.8 Water filling” “7.3 Commissioning procedure” in this document and refer the Outdoor unit Installation and Operation manual for the specific details about refrigerant charge tasks. -
Page 64: Test Run / Air Purge
• In case of Heater Forced OFF (by optional DIP switch setting) these condition is not performed and heating is performed by Heat Pump. Hitachi is not responsible for its operation when defrosting or starting at low water temperature conditions. - Page 65 This menu shows the following test to be launched: • Unit Test Run • Air Purge • Screed Drying • Pump down procedure After “Test Run”, “Air Purge” or “Pump down procedure” option is selected, the YUTAKI user controller asks for the duration of the test. Example for PC-ARFH2E2 PMEN0657 rev.0 - 02/2024...
- Page 66 In case of test run, user can also select the mode of the test (cooling or heating). When user confirms the test run or the air purge, the YUTAKI user controller sends the order to the indoor. During the execution of this test, the following screen is shown: When the test starts, the user controller will exit from the installer mode.
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Page 67: Maintenance
Maintenance 8.1 Removing the service cover ................67 8.2 Removing the upper cover ................68 8.3 Removing the rear cover .................69 PMEN0657 rev.0 - 02/2024... - Page 68 DANGER • Turn OFF the power source before the maintenance work. If not, it may cause a fire or an electric shock. • Perform the maintenance work with stable footing. If not, it may cause falling or injury. CAUTION Do not make service or inspections tasks by yourself. This works must be performed by qualified service person.
- Page 69 8.2 Removing the upper cover 1 Remove the 13 screws fixing the upper cover. 2 Pull the upper cover upwards and remove it. CAUTION Pay attention of no falling off the upper cover. PMEN0657 rev.0 - 02/2024...
- Page 70 8.3 Removing the rear cover 1 Remove the 11 screws fixing the rear cover. 2 Slide the Rear cover slightly downwards and remove it pulling it backwards. CAUTION Pay attention of no falling off the rear cover. PMEN0657 rev.0 - 02/2024...
- Page 71 Johnson Controls-Hitachi Air Conditioning Spain, S.A.U. Ronda Shimizu, 1 - Políg. Ind. Can Torrella 08233 Vacarisses (Barcelona) Spain © Copyright 2024 Johnson Controls-Hitachi Air Conditioning Spain, S.A.U. – All rights reserved. PMEN0657 rev.0 - 02/2024...