3 Technical Information Unit Compatibility Outdoor unit Cylinder unit EHST20C- EHST20C- EHST20C- EHST20C- EHST20C- EHST20C- EHST20C- EHST20C- EHST20C- EHPT20X- EHPT20X- EHPT20X- EHPT20X- EHPT20X- EHPT20XVM6HB YM9HB TM9HB VM2B VM6B YM9B VM6EB YM9EB VM6SB VM2HB VM6HB YM9HB TM9HB VM6B YM9B Packaged model PUHZ-W50-85 PUHZ-HW112-140 Split model PUHZ-RP35-140 PUHZ-HRP71-125 PUHZ-SW40-120 PUHZ-SHW80-140 PUHZ-FRP
3 Technical Information UK Packaged model system (UK Packaged model system) B 38 26 10 Cold water 9 DHW 35 Pa 34 26 11 27 28 Drain 12 Drain 17 30 13 26 Drain Local system *1 23 15 31 30 16 Drain 14 8 7 Flexible hose (Temporary connection) 6 1 30 21 4 5 36 3 34 30 20 Mains water supply 19 18 22 Cylinder unit
3 Technical Information (Packaged model system) 26 10 9 Cold water B 37 29 Pa DHW 27 26 34 11 Drain 28 12 Drain 30 13 Local system *1 23 15 16 14 8 25 M 7 6 1 30 21 4 5 GB 3 34 30 20 19 18 Cylinder unit 22 31 30 29 Water supply Drain B. 1. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 18. 19. 20. 21. 22. 23. 25. 26. 27. 28. 29. 30. 31.
3 Technical Information Local system 1-zone temperature control Zone1 Zone1 3 5 4 1 2 2-zone temperature control 1 6 Zone1 3 4 5 6 7 2 1 Zone2 8 GB 9 10 12 11 1-zone temperature control with boiler 2-zone temperature control with boiler 13 13 14 14 15 Zone1 15 Zone1 3 3 5 4 4 2 6 1 2 6 5 1 Zone2 7 8 9 10 11 12 1. Zone1 heat emitters (e.g. radiator, fan coil unit) (field supply) 2. Mixing tank (field supply) 3. Zone1 flow water temp. thermistor (THW6) 4.
4 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. Discharge the capacitor before commencing work involving the electric parts. ● ● ● ● ● Do not perform work involving electric parts with wet hands.
4 Installation 4.2 Water Quality and System Preparation inimum amount of water required in the space M heating circuit General Outdoor heat pump unit Packaged model PUHZ-W50 PUHZ-W85 PUHZ-HW112 PUHZ-HW140 Split model PUHZ-RP35 PUHZ-RP50 PUHZ-RP60 PUHZ-(H)RP71 PUHZ-(H)RP100 PUHZ-(H)RP125 PUHZ-RP140 PUHZ-SW40 PUHZ-SW50 PUHZ-SW75 PUHZ-SW100 PUHZ-SW120 PUHZ-SHW80 PUHZ-SHW112 PUHZ-SHW140 • Water quality should be to European Directive 98/83 EC standards. ► pH value of 6.5-8.0 (Recommended: pH6.5 - 7.
4 Installation 4.3 Water Pipe Work Hot Water Pipework The cylinder unit is UNVENTED. When installing unvented hot water systems building regulations part G3 (England and Wales), P3 (Scotland) and P5 (Northern Ireland) should be adhered to. If outside of the UK please adhere to your own country’s regulations for unvented hot water systems. Connect the flow for the DHW to pipe A (Figure 3.1).
4 Installation Water Circulation Pump Characteristics Pump speed can be selected by main controller setting (see ). Adjust the pump speed setting so that the flow rate in the primary circuit is appropriate for the outdoor unit installed (see Table 4.3.1). It may be necessary to add an additional pump to the system depending on the length and lift of the primary circuit. If a second pump is required for the installation please read the following carefully.
4 Installation Safety Device Connections The expansion relief valve on the secondary hot water side, and the temperature and pressure (T&P) relief valve (*1), situated part way down the DHW tank on the right hand side, both need appropriate discharge pipework. In accordance with Building Regulations a tundish must be fitted into the pipework within 500 mm of the safety device (also see Figure 4.4.1).
4 Installation 4.5 Safety Device Discharge Arrangements (G3) i. Ideally below a fixed grating and above the water seal in a trapped gully. The following instructions are a requirement of UK Building Regulations and must be adhered to. For other countries please refer to local legislation. If you are in any doubt please seek advice from local building planning office. ii. Downward discharges at low level; i.e. up to 100 mm above external surfaces such as car parks, hard standings, grassed areas etc.
4 Installation 4.6 Electrical Connection The cylinder unit can be powered in two ways. 1. Power cable is run from the outdoor unit to the cylinder unit. 2. Cylinder unit has independent power source All electrical work should be carried out by a suitably qualified technician. Failure to comply with this could lead to electrocution, fire, and death. It will also invalidate product warranty. All wiring should be according to national wiring regulations.
4 Installation Cylinder unit <3 phase> TB1 L Outdoor unit Power supply 3N~ 400 V 50 Hz Earth leakage circuit breaker *1 Wiring circuit breaker or Isolating switch N To control board L1 S1 L2 S2 S2 L3 S3 S3 S1 N ECB1 For Power supply 3~ 400 V 50 Hz (EH*T20*-YM*B) 3~ 230 V 50 Hz (EH*T20*-TM*B) Wiring circuit breaker or Isolating switch Power supply ~/N 230 V 50 Hz Wiring circuit breaker or Isolating switch L1 booster L2 heater (Primary circuit) L3 ECB2 L N For Immersion heater (DHW t
4 Installation N BLACK Black CN01 YELLOW S1 YELLOW • Change the connector connections in the control and electrical box of the cylinder unit (see Figure 4.6.3) • Turn the outdoor unit DIP switch SW8-3 to ON • Turn on the outdoor unit BEFORE the cylinder unit.
4 Installation Cylinder unit <3 phase> TB1 Power supply ~/N 230 V 50 Hz Wiring circuit breaker or Isolating switch Earth leakage circuit breaker *1 L N To control board Outdoor unit Power supply 3N~ 400 V 50 Hz Earth leakage circuit breaker *1 Wiring circuit breaker or Isolating switch L1 S1 S1 L2 S2 S2 L3 S3 S3 N ECB1 Power supply 3~ 400 V 50 Hz (EH*T20*-YM*B) 3~ 230 V 50 Hz (EH*T20*-TM*B) Wiring circuit breaker or Isolating switch L1 L2 L3 ECB2 Wiring circuit breaker or Isolating sw
5 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. To move the switch you will need to use a pin or the corner of a thin metal ruler or similar. SW4 SW1 SW2 Dip switch settings are listed below in Table 5.1.1.
5 System Set Up 5.2 Connecting inputs/outputs CNP1(WHT) １ ２ 1 ３ 3 ４ ５ ６ ７ TBO.1 ８ 1 １０ 5 CNV1 (WHT) ９ １１ CN01 (BLK) 5 CN3C (BLU) 1 When the wires are wired to adjacent terminals use ring terminals and insulate the wires. 1 3 １２ １３ １４ FT C 4 １ ２ ３ ４ ５ ６ ７ ８ TBO.2 LED3 ９ CN105 (RED) １０ １１ １２ １３ 1 5 １４ 1 CNRF (WHT) 5 1 CNBH (WHT) 7 3 3 CNBC (GRY) 1 2 CN108 1 1 1 1 2 SW4 1 LED1 1 2 3 ２ １ ４ ３ ６ ５ ８ ７ １０ １２ １４ ９ 6 SW2 4 １１ １３ ２ １ ４ ３ TBI.
5 System Set Up Outputs Name OUT1 OUT2 OUT3 OUT4 Terminal block TBO.1 3-4 TBO.1 5-6 TBO.1 7-8 TBO.1 9-11 TBO.1 12-13 OUT5 TBO.1 13-14 OUT6 — OUT7 — OUT8 TBO.2 11-12 OUT9 TBO.2 9-10 OUT11 TBO.2 1-2 OUT12 TBO.
5 System Set Up 5.4 Remote Controller Options Factory supplied standard The cylinder unit comes factory fitted with a main controller. This incorporates a thermistor for temperature monitoring and a graphical user interface to enable set-up, view current status and input scheduling functions. The main controller is also used for servicing purposes. This facility is accessed via password protected service menus.
5 System Set Up 2-zone temperature control Control option A This option features the main controller, the Mitsubishi Electric wireless remote controller and a locally supplied thermostat. The wireless remote controller is used to monitor the Zone1 room temperature and the thermostat is used to monitor the Zone2 room temperature. The thermostat can be also allocated to Zone1 and the wireless remote controller to Zone2. Wireless receiver (option) Wireless remote controller (option) 20.
5 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 Main controller cover 1. Open front panel of cylinder unit. (See Section 4.2.) 2. Remove the four screws from the metal back plate of main controller using a screwdriver. (Figure 5.4.1.) 3. Lift off the metal back plate. 4.
5 System Set Up 5.5 Using SD memory card The cylinder unit is equipped with an SD memory card interface in FTC4. Using an SD memory card can simplify main controller settings and can store operating logs. *1 (a) F or insertion, push on the SD memory card until it clicks into place. (b) F or ejection, push on the SD memory card until it clicks. Note: To avoid cutting fingers, do not touch sharp edges of the SD memory card connector (CN108) on the FTC4 control board.
5 System Set Up 5.6 Main Controller A F1 F3 F2 C Name Function A B Screen Menu C D E Back Confirm Power/Holiday F1-4 Function keys Screen in which all information is displayed Access to system settings for initial set up and modifications. Return to previous menu. Used to select or save. (Enter key) If system is switched off pressing once will turn system on. Pressing again when system is switched on will enable Holiday Mode.
5 System Set Up Initial Main screen Unrestricted access Installer only F1 Information Option F4 F1 F2 F3 F4 Main menu Forced DHW DHW Heating Holiday ON/OFF ON/Prohibited/Timer ON/Prohibited/Timer Active/Non active Set time DHW Normal/Eco Edit DHW max. temp. DHW max. temp. drop DHW max. operation time DHW mode restriction Legionella Active/Non active GB Edit Hot water temp. Frequency Start time Max. operation time Duration of max. temp.
5 System Set Up Initial Unrestricted access Installer only Main screen Main menu Service (Password protected) Manual operation Function settings Thermistor adjustment Auxiliary settings Economy settings for pump Electric heater (Heating) Electric heater (DHW) Mixing valve control ON/OFF Delay ON/OFF Delay ON/OFF Delay Running Interval Heat source setting Pump speed Standard (Heat pump & electric heater)/Heater (Electric heater only)/ Boiler/Hybrid (Heat pump & heater/Boi
5 System Set Up Setting the Main Controller After the power has been connected to the outdoor and cylinder units (See chapter 4.6) the initial system settings can be entered via the main controller. 1. Check all breakers and other safety devices are correctly installed and turn on power to the system. 2. When the main controller switched on for the first time, the screen automatically goes to Initial settings menu, Language setting screen and Date/Time setting screen in order. 3.
5 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 Zone1 and Zone2 separately.
5 System Set Up Explanation of DHW operation • When the DHW tank temperature drops from “DHW max. temp” by more than the “DHW max. temperature drop” (set by installer), DHW mode operates and the flow from the primary heating circuit is diverted to heat the water in the DHW tank. • When the temperature of the stored water reaches the ‘DHW max. temp.’ set by the installer or if the ‘DHW max. operation time’ set by the installer is exceeded DHW mode ceases to operate.
5 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 temperature or for the maximum DHW time, whichever occurs first. However should there be a high demand for hot water ‘Forced DHW’ function can be used to prevent the system from routinely switching to space heating and continue to provide DHW tank heating.
5 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. Option 2. From the main menu screen press button F4. The current settings screen will be displayed. Press button F4 again to access the holiday mode activation screen.
5 System Set Up 1. 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 F1 to check or uncheck the box. 4. When you have selected the days press CONFIRM. GB Day of week select screen 5. The time bar edit screen will be displayed. 6. Use buttons F2/F3 to move to the point at which you do not want the selected mode to be active press CONFIRM to start. 7.
5 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. GB rom the main setting menu use F2 and F3 to highlight the service icon then 1. F press CONFIRM. 2. You will be prompted to enter a password. THE FACTORY DEFAULT PASSWORD IS “0000”. 3. Press CONFIRM. (It takes approx.
5 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. This is to prevent accidental permanent override of the FTC4. rom the service menu use F1 and F2 buttons to scroll through list until 1. F Manual Operation is highlighted. 2.
5 System Set Up 1. From the Auxiliary settings menu highlight Mixing valve control. 2. Press CONFIRM. 3. The Mixing valve control screen is displayed. 4. 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%). Note: S et the Runing time according to the specifications of the actuator of each mixing valve. 1. 2. 3.
5 System Set Up Operation settings 1. T o access the Operation settings menu use F1 and F2 buttons to scroll through the service menu until Operation settings is highlighted. 2. Press CONFIRM. 3. Operation settings menu is displayed. Operation settings menu screen 1. From the Auxiliary settings menu highlight Freeze Stat Function. 2. Press CONFIRM. 3. The freeze stat function screen will be displayed. 4.
5 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 adaptation mode. rom the Operation settings menu use F1 and F2 buttons to scroll through the list 1. F until Room temp. control (HEATING) is highlighted. 2. Press CONFIRM. 3. Use F1 and F2 keys to scroll through the menu selecting each subtitle in turn by pressing CONFIRM.
5 System Set Up External input settings From the service menu use F1 and F2 buttons to highlight External input settings then press CONFIRM. 1. From the External input settings menu highlight Demand control (IN4). 2. Press CONFIRM. 3. The Demand control screen is displayed. External input settings menu screen 4. Press F3 button to select Heat source OFF or Boiler. 5. Press CONFIRM.
5 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 default settings. rom the service menu use F1 and F2 buttons to scroll through list until Manual 1. F Reset is highlighted. 2. Press CONFIRM. 3. The Manual reset screen is displayed. 4. Choose either Manual Reset for FTC4 or Main Controller. GB 5. Press F3 button to confirm manual reset of chosen device.
6 Commissioning Pre-commissioning exercises- potable/DHW circuit Initial fill procedure: Ensure all pipe joints and fittings are tight and secure. Open the most distant DHW tap/outlet. Slowly/gradually open the mains water supply to begin filling unit and DHW pipework. Allow most distant tap to run free and release/purge residual air from installation. Close tap/outlet to retain fully charged system. Note: When an immersion heater is fitted, do NOT energise the heater until the DHW tank is full of water.
7 Service and Maintenance The indoor cylinder unit is UNVENTED. Under UK law* the system must be serviced once a year by a qualified individual. Servicing and maintenance of the outdoor unit should only be done by a Mitsubishi Electric trained technician with relevant qualifications and experience. Any electrical work should be done by a tradesperson with the appropriate electrical qualifications.
7 Service and Maintenance Error Codes Code Error Action Flow rate may be reduced check for; • Water leakage • Strainer blockage • Water circulation pump function (Error code may display during filling of primary circuit, complete filling and reset error code.) Check the immersion heater and it’s contactor.
7 Service and Maintenance Annual Maintenance It is essential that the cylinder unit is serviced at least once a year by a qualified individual any spare parts required should be purchased from Mitsubishi Electric. Never bypass safety devices or operate the unit without them being fully operational. Use the Annual Maintenance Log Book as a guide to carrying out the necessary checks on the cylinder unit and outdoor unit.
7 Service and Maintenance Engineers Forms 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.
7 Service and Maintenance Engineers Forms Commissioning/Field settings record sheet (continued from the previous page) Main controller screen Service menu Standard/Heater/Boiler/Hybrid *3 Outdoor ambient temp. (3 - 20°C) Default setting Standard 5°C On/Off *4 Off Outdoor ambient temp. (−15 - +10°C) −15°C Parameters Heat source setting Operation settings Freeze stat function Simultaneous operation (DHW/ Heating) Cold weather function On/Off *4 Outdoor ambient temp.
GB 50
