Hydrobox EHSC series EHPX series ERSC series INSTALLATION MANUAL FOR INSTALLER English (GB) For safe and correct use, read this manual and the outdoor unit installation manual thoroughly before installing the hydrobox. English is the original language. The other language versions are translations of the original. INSTALLATIONSHANDBUCH FÜR INSTALLATEURE Deutsch (D)
Do not position furniture or electrical appliances below the outdoor unit or hydrobox. The discharge pipework from the emergency/safety devices of the hydrobox should be installed according to local law. Only use accessories and replacement parts authorised by Mitsubishi Electric ask a qualified technician to fit the parts. Electrical All electrical work should be performed by a qualified technician according to local regulations and the instructions given in this manual.
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Safety Notices WARNING (SPLIT MODELS ONLY) Do not discharge refrigerant into the atmosphere if refrigerant leaks during installation, ventilate the room. Use appropriate tools for high pressure refrigerant. When pumping down refrigerant , stop the compressor before disconnecting the refrigerant pipes. During installation securely fasten the refrigerant pipes before starting the compressor.
Overview of the System The Mitsubishi Electric Air to Water (ATW) for heat pump system with hydrobox consists of the following components; outdoor heat pump unit and indoor hyd- robox incorporating the main controller.
The room temperature sensor can either be wired or the Mitsubishi Electric wire- less remote controller can be used as it incorporates a temperature sensor. For more information on room temperature sensor options see section ‘Remote Con-...
Technical Information Component Parts (Split model system) Number Component Control and electrical box Main controller Manometer Expansion vessel Expansion vessel charge valve Automatic air vent Booster heater Drain cock Water circulation pump Pressure relief valve Flow switch Plate heat exchanger Strainer valve Inlet from space heating/Indirect DHW tank (pri- mary return)
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Technical Information (Split model system without expansion vessel) Number Component Control and electrical box Main controller Manometer Automatic air vent Booster heater Drain cock Water circulation pump Pressure relief valve Flow switch Plate heat exchanger Strainer valve Inlet from space heating/Indirect DHW tank (pri- mary return) Outlet to space heating/Indirect DHW tank (primary flow)
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Technical Information (Packaged model system) Number Component Control and electrical box Main controller Manometer Expansion vessel Expansion vessel charge valve Automatic air vent Booster heater Drain cock Water circulation pump Pressure relief valve Flow switch Strainer valve Inlet from space heating/Indirect DHW tank (pri- mary return) Inlet from heat pump Outlet to heat pump...
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Technical Information (Split model system for heating and cooling) Number Component Control and electrical box Main controller Manometer Expansion vessel Expansion vessel charge valve Automatic air vent Booster heater Drain cock Water circulation pump Pressure relief valve Flow switch Plate heat exchanger Strainer valve Drain pan...
Technical Information Technical Drawings (Split model system) Automatic air vent Earth leakage circuit breaker Terminal block Pressure relief Main controller valve （233) Letter Pipe description Connection size/type Space heating/Indirect DHW 28 mm/Compression tank (primary) return connection Space heating/Indirect DHW 28 mm/Compression tank (primary) flow connection...
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Technical Information (Split model system) Automatic air vent Earth leakage circuit breaker Terminal block Pressure relief Main controller valve (233) Letter Pipe description Connection size/type Space heating and cooling/ Indirect DHW tank (primary) G nut return connection Space heating and cooling/ Indirect DHW tank (primary) flow...
Technical Information Unit Compatibility Hydrobox EHSC-VM6B EHSC-YM9B EHSC-VM6EB EHSC-YM9EB EHPX-VM2B EHPX-VM6B EHSC-YM9B ERSC-VM2B Outdoor unit PUHZ-W50-85 Packaged-type PUHZ-HW112-140 Split-type PUHZ-RP35-140 PUHZ-HRP71-125 PUHZ-SW40-120 PUHZ-SHW80-140 PUHZ-FRP *1 Not available for connection to PUHZ-FRP
Water circuit diagram (Split model system) Refrigerant pipe Water pipe ...
Technical Information Local system 1-zone temperature control Zone1 Zone1 2-zone temperature control Zone1 Zone2 1-zone temperature control with boiler 2-zone temperature control with boiler Zone1 Zone1 Zone2 1. Z one1heatemitters(e.g.radiator,fancoilunit)(fieldsupply) 2. Mixingtank(fieldsupply) 3. Zone1flowwatertemp.thermistor(THW6)(option) 4. Zone1returnwatertemp.thermistor(THW7)(option) 5. Zone1watercirculationpump(fieldsupply) 6. Zone1flowswitch(fieldsupply) 7.
4. Installation Installation ● Prepare the proper tools. ● Prepare the proper protection. ● Allow parts to cool before attempting any maintenance. ● Provide adequate ventilation. ● After stopping the operation of the system, turn off the power-supply breaker and remove the power plug. ●...
Installation Mounting procedure . Install the included back plate accessory. * When installing the back plate, use field-supplied screws and compatible fixing plugs. Notch Back plate Back plate Wall Screw mounting holes ● Ensure that the notch is positioned at the TOP of the back plate. ...
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Installation ) Each of the right and left side panels has a mark indication. Lift up the unit so that the marks are positioned above the top edge of the back plate as shown below. Unit mark Wall Hook...
Installation 4.2 Water Quality and System Preparation Minimum amount of water required in the space heating/cooling circuit General • Water quality should be to European Directive 98/83 EC standards. Outdoor heat pump unit Minimum water quantity [L] ► pH value of 6.5-8.0 (Recommended: pH6.5 - 7.5) Packaged model PUHZ-W50 ►...
Installation 4.3 Water Pipe Work Pipework Connections Note: Prevent the field piping from straining the piping on the hydrobox by Connections to the hydrobox should be made using the 28 mm compression as fixing it to a wall or applying other methods. appropriate.
Installation sizing Expansion Vessels Expansion vessel sizing Expansion vessel volume must fit the local system water volume. To size an expansion vessel both for the heating and cooling circuits the following formula and graph can be used. When the necessary expansion vessel volume exceeds the volume of an built-in expansion vessel, install an additional expansion vessel so that the sum of the volumes of the expansion vessels exceeds the necessary expansion vessel volume.
Installation 4.4 Refrigerant Pipework (Split Model Systems only) 45 2 Installation of refrigerant pipework MUST only be done by a technician with rele- vant qualifications. Installation requirements may differ depending on the outdoor unit selected. Please also refer to outdoor unit installation manual when connect- ing refrigerant pipework.
Installation 4.5 Electrical Connection The hydrobox can be powered in two ways. . Power cable is run from the outdoor unit to the hydrobox. All electrical work should be carried out by a suitably qualified technician. Failure 2. Hydrobox has independent power source. to comply with this could lead to electrocution, fire, and death.
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Installation Option 1: Hydrobox powered via outdoor unit <1 phase> Hydrobox Outdoor unit To control board Power Wiring Earth supply circuit leakage breaker or circuit 230V Isolating 50Hz breaker switch ECB1 Power booster Wiring supply heater circuit (Primary circuit) breaker or 230V Isolating 50Hz...
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Installation <3 phase> Hydrobox Outdoor unit To control board Power supply Earth Wiring leakage circuit 400V circuit breaker or 50Hz breaker Isolating switch ECB1 Power booster supply heater Wiring (Primary circuit) circuit 400V breaker or 50Hz Isolating switch *1 If the installed earth leakage circuit breaker does not have an over-current protection function, install a breaker with that function along the same power line.
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Installation Option2: Hydrobox powered by independent source If the hydrobox and outdoor units have separate power supplies, the following requirements MUST be carried out: Black Initial settings CN01 • Change connector connections in hydrobox control and electrical box (Power supplied Hydrobox (see Figure 4.5.7).
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Installation <3 phase> Hydrobox Power supply Earth Wiring leakage circuit 230V breaker or circuit 50Hz breaker Isolating switch Outdoor unit To control board Power supply Wiring Earth circuit leakage 400V breaker or circuit 50Hz Isolating breaker switch ECB1 booster Power Wiring heater supply...
5. System Set UP System Set Up 5.1 Dip Switch Functions Located on the FTC4 printed circuit board are 4 sets of small white switches known as Dip switches. The Dip switch number is printed on the circuit board next to the relevant switches. The word ON is printed on the circuit board and on the Dip switch block itself.
System Set Up 5.2 Connecting inputs/outputs CNP1(WHT) １ ２ CN01 When the wires are wired to adjacent terminals use ring terminals and insu- ３ (BLK) ４ late the wires. ５ TBO.1 ６ CN3C ７ ８ (BLU) CNV1 ９ (WHT) １０ １１...
System Set Up Outputs Name Terminal block Connector Item Signal/Max current Max. total current OUT TBO. 3-4 CNP Water circulation pump 1 output (Space heating & DHW) 230V AC 1.0 A Max 3.0 A (a) OUT2 TBO. 5-6 — Water circulation pump 2 output (Space heating for Zone1) OFF 230V AC 1.0 A Max OUT3 TBO. 7-8...
System Set Up 5.4 Installation procedure for DHW tank • Power supply: 230V AC • Current: 0.1A Max (If over 0.1A you must use a relay) Note: • Type: Normally closed • Be aware that the respective DHW operations are greatly effected by the Installation Electrical connection Output signal...
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System Set Up Recommended DHW system Where system involves a DHW tank: Immersion Booster DHW tank BH function System diagram Thermistor heater heater Present Absent Present For space THW: Flow water temp. heating/ THW2: Return water temp. DHW tank cooling and THW5: Tank water temp.
Room controller installation manual.) Control option B This option features the main controller and the Mitsubishi Electric thermistor wired to FTC4. The thermistor is used to monitor room temperature but can not make any FTC4 changes in control operation. Any changes to DHW (*1) must be made using the main controller mounted on the hydrobox.
The thermostat is wired to IN6 on FTC4. (If the thermostat is allocated to Zone1, it is wired to IN1 on TBI.1.) (Refer to 5.2.) Control option B This option features the main controller, the Mitsubishi Electric thermistor and a locally supplied thermostat that are wired to FTC4. Room temperature...
System Set Up Remote Installation of Main Controller The following instructions are related to a system controlled as in Control option C. Metal back plate 1. Open front panel of hydrobox. (See section 4.2.) 2.
(9) FTC4 supports FAT file system but not NTFS file system. (10) Mitsubishi Electric is not liable for any damages, in whole or in part, including failure of writing to an SD memory card, and corruption and loss of the saved data, or the like.
System Set Up 5.7 Main Controller Letter Name Function Screen Screen in which all information is displayed Menu Access to system settings for initial set up and modifications. Back Return to previous menu. Confirm Used to select or save. (Enter key) Power/Holiday If system is switched off pressing once will turn system on.
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System Set Up Unrestricted access Initial Installer only Main screen Shaded items relate Information to DHW functions. Option These are only avail- Forced DHW ON/OFF able if the system ON/Prohibited/Timer includes a DHW tank. Heating/Cooling ON/Prohibited/Timer Holiday Active/Non active Set time...
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System Set Up Unrestricted access Initial Installer only Main screen Shaded items relate to DHW functions. Main menu Service These are only avail- (Password protected) able if the system Manual operation includes a DHW tank. Function settings Thermistor adjustment Auxiliary settings Economy setting for pump...
System Set Up Setting the Main Controller After the power has been connected to the outdoor unit and hydrobox (See chap- ter 4.5) the initial system settings can be entered via the main controller. . Check all breakers and other safety devices are correctly installed and turn on power to the system.
System Set Up 2. When 2-zone temperature control is active or wireless remote controllers are available, from Room RC zone select screen, select zone no. to assign to each remote controller. 3. From Sensor setting screen, select a room sensor to be used for monitoring the room temperature from Zone and Zone2 separately.
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System Set Up Explanation of DHW operation • When the DHW tank temperature drops from “DHW max. temp” by more than DHW tank temp. the “DHW max. temperature drop” (set by installer), DHW mode operates and Stop the flow from the primary heating/cooling circuit is diverted to heat the water in DHW max.
System Set Up Forced DHW The forced DHW function is used to force the system to operate in DHW mode. In normal operation the water in the DHW tank will be heated either to the set tem- perature or for the maximum DHW time, whichever occurs first. However should there be a high demand for hot water ‘Forced DHW’...
System Set Up Holiday mode Holiday mode can be activated in 2 ways. Both methods will result in the Holiday Mode activation screen being shown. Option 1. From the main menu screen button E should be pressed. Be careful not to hold down button E for too long as this will turn off the controller and system.
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System Set Up . In the preview menu screen press F4 button. Preview screen 2. First select the days of the week you wish to schedule. 3. Press F2/F3 buttons to move between days and F to check or uncheck the box.
System Set Up Service Menu The service menu provides functions for use by installer or service engineer. It is NOT intended the home owner alters settings within this menu. It is for this reason password protection is required to prevent unauthorised access to the service settings.
System Set Up Manual operation During the filling of the system the water circulation pump and 3-way valve can be manually overridden using manual operation mode. When manual operation is selected a small timer icon appears in the screen. The function selected will only remain in manual operation for a maximum of 2 hours.
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System Set Up From the Auxiliary settings menu highlight Mixing valve control. Press CONFIRM. The Mixing valve control screen is displayed. Use F1 and F2 buttons to set Running time between 30 to 240 seconds. The Running time equals to a period from full open of the valve (at a hot water mixing ratio of 100%) to full close (at a cold water mixing ratio of 100%).
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System Set Up Operation settings To access the Operation settings menu use F and F2 buttons to scroll through the service menu until Operation settings is highlighted. Press CONFIRM. Operation settings menu is displayed. Operation settings menu screen From the Auxiliary settings menu highlight Freeze Stat Function.
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System Set Up This function allows operational setting of flow temperature range from the Ecodan and also the time interval at which the FTC4 collects and processes data for the auto adap- tation mode. From the Operation settings menu use F1 and F2 buttons to scroll through the list until Room temp.
System Set Up External input settings From the service menu use F and F2 buttons to highlight External input settings then press CONFIRM. From the External input settings menu highlight Demand control (IN4). Press CONFIRM. The Demand control screen is displayed. External input settings menu screen Press F3 button to select Heat source OFF or Boiler.
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System Set Up Manual reset Should you wish to restore the factory settings at any time you should use the manual reset function. Please note this will reset ALL functions to the factory de- fault settings. From the service menu use F1 and F2 buttons to scroll through list until Manual Reset is highlighted.
6. Commissioning Commissioning Commissioning Pre-commissioning Checklist Before commissioning the hydrobox system complete the following table to ensure the necessary checks are carried out. System commissioning checklist Notes Installation location Air flow around the unit Outdoor unit Good/Poor Maintenance access Hydrobox Good/Poor Outdoor unit Good/Poor...
7. Service and Maintenance Service and Maintenance Service and Maintenance The indoor hydrobox must be serviced once a year by a qualified individual. qualifications. Any maintenance or ‘DIY’ fixes done by a non-accredited person Servicing and maintenance of the outdoor unit should only be done by a Mitsubi- could invalidate the Warranty and/or result in damage to the hydrobox and injury shi Electric trained technician with relevant qualifications and experience.
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Contact your Mitsubishi Electric dealer. 7. Immersion heater cut-out tripped. 7. Check immersion heater thermostat and press reset button, located on immersion heater boss, if safe.
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Contact your Mitsubishi Electric dealer. 5. Immersion heater cut-out has been triggered. 5. Check immersion heater thermostat and press reset button located on immersion heater boss, if safe.
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Service and Maintenance Fault symptom Possible cause Explanation - Solution In 2-zone tempera- When Zone and Zone2 are both in heating Normal action no action necessary. ture control, only mode, the hot water temperature in Zone2 Zone2 does not does not exceed that in Zone. reach the set tem- Faulty wiring of motorized mixing valve Refer to "5.3 Wiring for 2-zone temperature control".
Annual Maintenance It is essential that the hydrobox is serviced at least once a year by a qualified individual any spare parts required MUST be purchased from Mitsubishi Electric (safety matter). NEVER bypass safety devices or operate the unit without them being fully operational.
Service and Maintenance Error Codes Code Error Action Flow rate may be reduced check for; • Water leakage Circulation water temperature overheat protection • Strainer blockage • Water circulation pump function (Error code may display during filling of primary circuit, complete filling and reset error code.) DHW tank water temperature overheat protection Check the immersion heater and it’s contactor.
Service and Maintenance Engineers Forms (1/2) Should settings be changed from default, please enter and record new setting in ‘Field Setting’ column. This will ease resetting in the future should the system use change or the circuit board need to be replaced. Commissioning/Field settings record sheet Default setting Field Main controller screen...
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Service and Maintenance Engineers Forms (2/2) Commissioning/Field settings record sheet (continued from the previous page) Default Field Main controller screen Parameters Notes setting setting Service menu Heat source setting Standard/Heater/Boiler/Hybrid *5 Standard Operation settings Freeze stat function Outdoor ambient temp. (3 - 20°C) 5°C Simultaneous On/Off *6...
Service and Maintenance Annual Maintenance Log Book Contractor name Engineer name Site name Site number Hydrobox maintenance record sheet Warranty number Model number Serial number Mechanical Frequency Notes Isolate and drain hydrobox, remove mesh from internal strainer clean and replace. Open the pressure relief valve, check for unrestricted discharge to the tundish and that the valve reseats correctly.
Supplementary information Refrigerant collecting (pumpdown) for split model systems only Refer to “Refrigerant collection” in the outdoor unit installation manual or service manual. Back-up operation of boiler Heating operation is backed up by boiler. For more details, refer to the installation manual of PAC-TH011HT-E.
