Metro Therm Microbooster PS Manual
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Metro Therm Microbooster PS Manual

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MICROBOOSTER HEAT PUMP
08:220-1809
Manual
METRO Microbooster P
METRO Microbooster PS
METRO Microbooster V
METRO Microbooster VS

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  • Page 1 MICROBOOSTER HEAT PUMP 08:220-1809 Manual METRO Microbooster P METRO Microbooster PS METRO Microbooster V METRO Microbooster VS...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 About the product .

  • Page 4: Introduction

    INTRODUCTION The aim of this manual is to give information, instructions and warnings on the Micro- booster Domestic Hot Water Heat Pump (MBHP). The manual is to be used by install- ers and plumbers as well as by end users, since it contains important safety information.
  • Page 5 1.2. Technical data 1.2.1. General The unit is composed of a water tank, a refrigerant circuit, a cabinet and a display that is connected to a control board. The main scope of the appliance is to heat water stored in a tank. 1.2.2.
  • Page 6 1.2.3. Refrigerant circuit As depicted in Figure 1 and 2, the heat pump cycle can be divided in four main pro- cesses: compression (1-2), condensation (2-3), expansion (3-4), evaporation (4-1) described below: • At the suction of the compressor (1) the superheated refrigerant gas enters the compressor at low pressure.
  • Page 7 1.2.4. Safety instructions – Refrigerant circuit • Only skilled and trained technicians shall carry out repair and service of the heat pump circuit. • Before opening the refrigerant circuit, discharge the heat source to a level that allows safe working conditions. •...
  • Page 8 Figure 4 – Design of the refrigerant circuit and the main components Refrigerant circuit Water circuit GQ1: Compressor XL1: Water inlet RM1: Check valve XL2: Water outlet EP1: Evaporator XL3: Heat source inlet EP2: Condenser XL4: Heat source outlet HZ1: Filter drier XL5: Water recirculation QN2: Thermostatic XL6: Condensate outlet...
  • Page 9 Figure 5 – Design of tank, condenser and related components Sensors Electric components BT1: Heat source inlet temperature AA1: Main printed circuit board BT2: Heat source outlet temperature AA2: Display circuit board BT3: Tank water temperature GC1: Solar (PV) 0-10V (fig. 13) BP1: High pressure switch QA1: SG-ready port (fig.
  • Page 10 1.2.6. Main Technical Data The main technical data are collected in the following figures and table. Figure 6 – Dimensional data Parameter Unit Dimensional data A – Height 1570 H - Diameter Ø603 I - Max diameter Ø620 Height required for installation 1730 Weight (dry) Nominal insulation thickness...
  • Page 11 Parameter Unit Electrical data Power supply V/Hz 230/50 Fuse 13 (10) Electric connections L1, N, G Electric heater power 1500 Refrigerant and water circuit Refrigerant type R134a Refrigerant quantity 1220 1430 CO2 equivalent Refrigerant circuit Hermetically sealed Protection rating IP21 Water connections ¾...
  • Page 12 Parameter Unit Operating limits Max. compressor power Max. water temperature (heat pump only) °C Max. water temperature (heat pump and °C electric water heater) Min. required heat source flow Max. domestic hot water pressure Max. allowed heat source pressure Max. available pressure difference...

  • Page 13: Transport, Handling And Delivery

    2. TRANSPORT, HANDLING AND DELIVERY Immediately upon receipt, the domestic hot water heater pump must be examined to make sure that it is intact and undamaged. If not, the shipping company must be informed immediately. The recipient has the responsibility for all the shipments unless otherwise agreed.
  • Page 14 2.5. Transport with Trailer The unit must only be transported on the associated transport frame. This also applies to transport on stairs (figure 7). The unit must be secured against sliding on the trailer. Water connections etc. shall not be used for transportation purposes. It should be made sure that the trailer does not damage the cabinet or the various connections.

  • Page 15: Positioning

    3. POSITIONING The installation site should be equipped with a power supply of 220-240V and 50 Hz. The power supply and the hydraulic system must comply with the local regulations. The unit should be placed vertically, with a maximum inclination of 1°. The unit must be well balanced and stable on the ground surface.
  • Page 16 3.1. Set-up sequence Once the unit is placed in a room with characteristics as specified in the previous paragraph, then it can be prepared following the sequence described below: 1. Remove the packaging from the pallet. 2. Remove the transport fittings from the pallet. 3.

  • Page 17: Water Circuit

    4. INSTALLATION OF WATER CIRCUIT The water circuit must be installed in accordance with local norms and standards. The water used in the hot water- and heat source systems must fulfill the following requirements: • The domestic hot water circuit and tank must only contain drinking water. •...
  • Page 18 4.1. Domestic water connections Dirt in the pipe work must be avoided. After installation of the external pipes flush if required before connection of the domestic hot water heat pump. If no circulation of water is needed, make sure that the circulation connection is properly sealed.
  • Page 19 4.3. Pump and valve configuration The unit has two modes of operating; using a pump to regulate the water flow, and using a valve. When to use which mode is explained in paragraph 4.3.1 and 4.3.2. 4.3.1 Pump When the unit is serially connected to a water source, water flow is likely to be insuffi- cient and a pump is needed to generate the necessary water flow.
  • Page 20 4.4. S Coil connection (optional) In the unit there can be an extra heat exchanger installed. In the sensor pocket for the thermostat sensor, there can also be placed a sensor to control the external connec- tion e.g. oil burner, wood burner etc. The maximum inlet temperature of the heating coil is 89 °C.
  • Page 21 4.6. Leak test After installation it is necessary to check that the entire water installation is tight. This is accomplished by performing a water leak test. 4.7. Commissioning of the domestic water circuit IMPORTANT! Before commisioning the water circuit please read chapter 6 “Optimal Operation”. Fill the water tank via the cold water connecting branch.

  • Page 22: Electric Connections

    5. ELECTRIC CONNECTIONS The unit must be supplied with current at 220-240V and 50 Hz. The unit is supplied with a standard Schuko plug. If local regulations dictates fixed installation or if the supplied plug does not ensure correct earthing, cut off the Schuko plug from the power supply cable.

  • Page 23: Optimal Operation

    6. OPTIMAL OPERATION Only when the unit is connected heat source supply and domestic water supply it is safe to connect the electrical circuit to a power supply. Once the heat pump is con- nected to the power supply it will start in AUTO mode. Follow the steps in paragraph 7.1 and 7.2 for optimal operation of the Microbooster Domestic Hot Water Heat Pump.
  • Page 24 6.2. Step two: Control operating water flow Once the unit is running in AUTO mode it is important to control whether the water flow is sufficient. After approximately 10 minutes of operation “E7” will occur if the water flow is insufficient. If “E7”...

  • Page 25: Control And Operation

    7. CONTROL AND OPERATION 7.1. Home view The unit can be controlled from the control panel described in Figure 16. From the home view, all the main operational modes, functions, set points and information on the unit can be accessed. Figure 16 –...
  • Page 26 The top part of the screen gives information about the unit operation, time and tem- perature set point. This part is passive and it is changed automatically. The bottom part of the screen is active, meaning that the icon on the screen contains other menu items.
  • Page 27 Class Code Menu Item Description T s i The heat source inlet temperature. T s o The heat source outlet temperature (evaporator temp.). T tank The domestic hot water temperature in the storage tank. Flow % The actual flow of the heat source in percentage. Input V* The actual input signal in GC1 (0-10V) from the PV in Volts.
  • Page 28 Class Code Menu Item Description T1 Error The temperature sensor T1 is out of range. If this error occurs, the unit does not heat the water in any way. T2 Error The temperature sensor T2 is out of range. If this error occurs, the unit does not heat the water in any way.
  • Page 29 Code Set point name Description AUTO The heat pump heats the water when required using the heat pump operation. Under normal conditions, the compressor works until A1 T AUTO set point is reached. If the source temperature is below D7 Source T min, the electric heater starts and the heat pump shuts- off.
  • Page 30 7.4. Main Menu Entering this menu requires a good understanding of the unit operation. It is highly recommended to read and understand the descriptions of the following menu items. Changing some of these set points can have large effects on how the appliance operate and performs.
  • Page 31 7.4.2. Functions The functions are similar to the modes of operation but they cannot be accessed directly from the home view and they can vary from unit to unit. Factory Code point Description Range setting name The heat source flow is automatically adjusted in order to meet a predefined temperature difference between heat source inlet and outlet, as described in Figure 19.
  • Page 32 Factory Code point Description Range setting name The low tariff allows the electric heater and the heat pump to run only during periods with low electricity prices, according to the menu item that regulate the program of the low tariff D17/D18 (Low tariff weekday/ Standard weekends).
  • Page 33 7.4.3. General The general section collects all the standard settings that have little or no effect on the heat pump operation, exept for the menu item Reset. Activating the Reset function brings all the set points to the factory settings value. The set points of the General menu are described in the table below.
  • Page 34 7.4.4. Installer menu The installer menu should only be accessed by qualified personnel. Some of the set points that can be regulated from this menu can have large effects on the unit perfor- mance depending on the type of commissioning and installation. There should be a proper match between installer set points and type of installation in order to optimize the performance and lifetime of the unit.
  • Page 35 Set point Factory Code Description Range name setting The minimum heat source temperature allowed dur- ing the operation of the heat pump can be regulated Source T here. If inlet heat source temperature T1 is below 0 - 30 D7 Source T min, the heat pump stops and the elec- tric heater runs until the water set point is reached.
  • Page 36 Set point Factory Code Description Range name setting The forced operation of the heat pump can be activated here. The heat pump starts even if there Forced is not need for hot water. When the maximum OFF/ON operation temperature allowed by the heat pump is reached the unit will stop.
  • Page 37 Set point Factory Code Description Range name setting The SG ready function can be activated by the installer here. Three possible modes can be select- ed. This function allows the start of the heat pump from an external access. SG ready is not active if there is not external input (SG1 OFF, SG2 OFF).
  • Page 38 Set point Factory Code Description Range name setting The Preheat operation can be activated here. In Preheat Preheat operation, the water in the tank can be OFF/ON (coil) diirectly heated by the heat source through the coil, without the use of the heat pump. The Interim operation can be activated here.
  • Page 39 7.5. Photovoltaic Function The domestic hot water heat pump (DHWHP) can be controlled by a signal from a solar photovoltaic (PV) converter or an energy meter, either as simple start/stop via a poten- tial free contact or by a variable signal. Figure 20 represents possible installation configurations with or without energy meter.
  • Page 40 7.6. Safety features 7.6.1. High pressure switch In order to ensure that the compressor does not run beyond its operating envelope there is a built-in high pressure switch which shuts down the compressor when the pressure in the refrigerant circuit becomes too high. The pressure switch shuts down the compressor if the pressure gets higher than 25 bar.

  • Page 41: Maintenance

    8. MAINTENANCE Please observe local rules and regulations regarding potential periodically inspection of the heat pump by skilled personnel. 8.1. Environmental requirements When repairing or dismantling the Microbooster Domestic Hot Water Heat Pump please follow the environmental regulations and legal requirements in relation to recycling and disposal of materials.
  • Page 42 It is recommended to inspect the anode every year. 1) Disconnect the electrical power supply or pull out the power plug. 2) Remove the plastic front cover. This allows access to the anode. 3) Disconnect the wire connection between the anode and the tank (figure 21). 4) Insert a multimeter (range mA) between the anode and the tank.

  • Page 43: Disassembly & Decommissioning

    9. DISASSEMBLY & DECOMMISSIONING The following must be done during decommissioning: • Disconnected the unit from the power mains - i.e. the electrical cables are removed. • Close the heat source inlet and outlet and drain the fluid out of the source pipes located at the top of the heat pump.
  • Page 44 10. ALARMS AND TROUBLESHOOTING 10.1. Alarms Alarm Meaning Possible reasons Possible solutions E1, E2, Temperature The temperature sensor T1, T2 or T3 Check that the sensor is sensors out is defective or not connected to the connected to the PCB of range Substitute the temperature sensor...

  • Page 45: Troubleshooting

    10.2. Troubleshooting In addition check out the following questions before contacting an installer: • Is the cold water supply open? • Has any of the safety features disengaged the heat pump/electrical emersion heater? • Has external short-circuiting of terminals disengaged the heat pump? •...

  • Page 46: Warranty

    11. WARRANTY METRO THERM offers a warranty period for all products of 2 years from the docu- mented date of delivery. For tanks: METRO THERM offers a warranty period of 5 years with respect to internally developed corrosion of the internal tank.
  • Page 47 • If the Product has been positioned in such a way as to impede immediate servicing. Where the Product is difficult to access, METRO THERM disclaims any liability for any extra expenses that may be incurred as a result.

  • Page 48: Declaration Of Conformity

    12. DECLARATION OF CONFORMITY The Declaration of Conformity can be downloaded at www.METROTHERM.dk...

  • Page 49: Product And Installer Information

    13. PRODUCT AND INSTALLER INFORMATION Installed model: Serial number: Accessories: Installers Pipe installation Date: Company: Name: Phone number: Electrical installation Date: Company: Name: Phone number: Commissioning Date: Company: Name: Phone number:...
  • Page 50 NOTES...
  • Page 52 M ET R O THER M A/S INFO@ METR OT H E RM. D K R U N DINS VE J 55 WW W.MET R OTH E RM. D K 3 20 0 HE LS INGE...

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