Nibe S1256PC Installer Manual
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Nibe S1256PC Installer Manual

Ground source heat pump
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Installer manual
Ground source heat pump
NIBE S1256PC
IHB EN 2305-1
631161

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Summary of Contents for Nibe S1256PC

  • Page 1 Installer manual Ground source heat pump NIBE S1256PC IHB EN 2305-1 631161...
  • Page 2 Here, you can start or stop a temporary increase in the hot water Here, you can find information about product name, the product's temperature. serial number, the version of the software and service. When there is new software to download, you can do it here (provided that S1256PC is connected to myUplink).

  • Page 3: Table Of Contents

    General Item register Connections Settings Contact information 6 Commissioning and adjusting Preparations Filling and venting Start-up and inspection Setting the cooling/heating curve 7 myUplink Specification Connection Range of services 8 Control - Introduction Display unit NIBE S1256PC Table of Contents...

  • Page 4: Important Information

    The serial number can be found at the bottom right on for implementation by specialists. S1256PC, in the display on the home screen "Product over- view" and on the type plate (PZ1). The manual must be left with the customer.

  • Page 5: Inspection Of The Installation

    Shut off valves Circulation pump setting Electricity Connections Main voltage Phase voltage Fuses heat pump Fuses property Outside sensor Room sensor Current sensor Safety breaker Earth circuit-breaker Set emergency mode in menu 7.1.8.2 NIBE S1256PC Chapter 1 | Important information...

  • Page 6: Delivery And Handling

    S1256PC should be transported and stored vertically in a prox. 50 mm free space is required on each side, to allow dry place. When being moved into a building, S1256PC may the side panels to be removed (see image). All service on be leant back 45 °.

  • Page 7: Supplied Components

    The kit of supplied items is placed in packaging on top of the heat pump. Pull the panel's top edge towards you and lift diagonally upwards to remove it from the frame. NIBE S1256PC Chapter 2 | Delivery and handling...
  • Page 8 4. Press the top of the front section against the frame and Hook one bottom corner of the front onto the frame. screw it into place. Hook the other corner in place. 3. Check the display is straight. Adjust if necessary. Chapter 2 | Delivery and handling NIBE S1256PC...

  • Page 9: Removing Insulation

    The insulation can be removed to make installation easier. Remove the screws from the upper and lower edges. Twist the panel slightly outwards. 3. Move the panel outwards and backwards. 4. Assembly takes place in the reverse order. NIBE S1256PC Chapter 2 | Delivery and handling...

  • Page 10: The Heat Pump Design

    Miniature circuit breaker Electrical anode On/off button USB socket Network connection for myUplink 1 S1256PC-8 3x400 V is not equipped with miniature circuit breakers (FC1). 2 Only heat pump with enamelled vessel. MISCELLANEOUS Rating plate Identification plate, cooling module Cable gland Cable gland Designations according to standard EN 81346-2.

  • Page 11: Distribution Boxes

    Input circuit board Capacitor BT11 EB10 Compressor heater BT10 FQ14 Temperature limiter, compressor QA40 Inverter QN18 Choke EMC-filter COOLING COMPONENTS Evaporator Condenser Heat exchanger, cooling GQ10 Compressor Drying filter Expansion valve NIBE S1256PC Chapter 3 | The heat pump design...

  • Page 12: Pipe Connections

    Shut-off valve ature from the heat pump of 70 (65 °C with only the com- pressor). Non-return valve S1256PC is not equipped with external shut off valves; these Mixing valve must be installed to facilitate any future servicing. Circulation pump...

  • Page 13: Dimensions And Pipe Connections

    Dimensions and pipe SYSTEM DIAGRAM S1256PC consists of heat pump, water heater, immersion connections heater, circulation pumps and control system. S1256PC is connected to the brine and heating medium circuits. In the heat pump evaporator, the brine (water mixed with...

  • Page 14: Brine Side

    • shut-off valve Because the temperature of the brine system can fall below Install the shut-off valve as close to S1256PC as possible. 0 °C, it must be protected against freezing down to -15 °C. • enclosed filterball (QZ2) When making the volume calculation, use 1 litres of ready Install the filterball as close to S1256PC as possible.

  • Page 15: Climate System

    Climate system A climate system is a system that regulates the indoor temperature with the help of the control system in S1256PC and, for example, radiators, underfloor heating, underfloor cooling, fan coils, etc. CONNECTING THE CLIMATE SYSTEM Installation alternative Install as follows: S1256PC can be installed in several different ways, some of •...
  • Page 16 -EP21-QN25 POOL With the POOL 40 accessory, you can heat the pool with your system. During pool heating, the heating medium circulates between the S1256PC and the pool exchanger using the heat pump’s internal circulation pump. -CL11 -CL11-AA25 -CL11-EP5 -CL11-GP9...

  • Page 17: Electrical Connections

    If the building is equipped with an earth-fault breaker, damage to the heat pump electronics. S1256PC should be equipped with a separate one. • S1256PC must be installed via an isolator switch. The cable NOTE area has to be dimensioned based on the fuse rating used. •...
  • Page 18 89 °C and it is reset manually. Resetting The temperature limiter (FQ10) is accessed behind the front cover. Reset the temperature limiter by pressing its button (FQ10-S2). Chapter 5 | Electrical connections NIBE S1256PC...

  • Page 19: Connections

    If the voltage to the immersion heater and/or compressor and X6-2 (PE). is lost for a period, "Tariff blocking" must be selected at the same time via the selectable inputs, see section "Selectable inputs". NIBE S1256PC Chapter 5 | Electrical connections...
  • Page 20 Closed radiator thermostats can also cause problems. S1256PC operates without room sensor, but if you want to Sensors read the home’s indoor temperature from the display on Outside sensor S1256PC, the room sensor must be fitted.
  • Page 21 7.2.19 -"Pulse energy meter". unit. The multi-core cable between the enclosure and S1256PC must have a cable area of at least 0.5 mm². Load monitor Incoming electricity Integrated load monitor...
  • Page 22 Accessory 1 in series to terminal block X30:1 (GND), X30:2 (+12V), X30:3 AA5-X4 (B) and X30:4 (A) on the base board (AA2). The example shows the connection of several S1256PC . Main unit Heat pump 2 Heat pump 3 Huvudenhet Värmepump 2...
  • Page 23 / pressure switch / flow monitor for brine The output is a potential-free switching relay. (NC). If S1256PC is switched off or in emergency mode, the relay External activation of functions is in C-NC position. An external switch function can be connected to S1256PC AA2-X27 to activate various functions.

  • Page 24: Settings

    • circulation pump for hot water circulation – Blocking (A: Closed, B: Open) • external heating medium pump "SG Ready" is active. The compressor in S1256PC and additional heat are blocked. • ground water pump – • external reversing valve for hot water Normal mode (A: Open, B: Open) "SG Ready"...
  • Page 25 15.6 – 11.5 15.6 To activate when S1256PC is running: press and hold the 11.5 15.6 on/off button (SF1) for 2 seconds and select "emergency 1 Factory setting mode" from the shutdown menu.

  • Page 26: Commissioning And Adjusting

    Check the brine system for leakage. NOTE Connect the filling pump and return line on the brine Do not start S1256PC if there is a risk that the wa- system's filling connection (accessory). ter in the system has frozen. 3. If alternative 1 is used (level vessel), close the valve un- der the level vessel.

  • Page 27: Start-Up And Inspection

    Follow the instructions in the display’s start guide. If the Expansion vessel start guide does not start when you start the S1256PC, If a pressure expansion vessel (CM3) is used you can start it manually in menu 7.7.
  • Page 28 To set the correct flow in the brine system, the brine pump Language must run at the correct speed. S1256PC has a brine pump that is controlled automatically in standard mode. Certain functions and accessories may demand that it be run manually, in which case the correct speed must be set.

  • Page 29: Setting The Cooling/Heating Curve

    (l/s) lower supply temperature for cooling at a certain outdoor Climate system temperature. S1256PC has a heating medium pump that can be controlled Supply temperature Framledningstempereratur (°C) automatically. For manual operation, deactivate "Auto" in menu 7.1.2.2 and then set the speed according to the dia-...
  • Page 30 Caution With underfloor heating systems, the maximum supply temperature is normally set between 35 and 45 °C. Caution Must be restricted with underfloor cooling min. flow line temp. to prevent condensation. Chapter 6 | Commissioning and adjusting NIBE S1256PC...

  • Page 31: Myuplink

    Visit myuplink.com for more information. Specification You need the following in order for myUplink to be able to communicate with your S1256PC: • wireless network or network cable • Internet connection •...

  • Page 32: Control - Introduction

    For hard switch off: press and hold the on/off button for 5 seconds. To activate emergency mode when S1256PC is switched off: press and hold the on/off button (SF1) for 5 seconds. THE STATUS LAMP (Deactivate the emergency mode by pressing once.) The status lamp indicates current operating status.

  • Page 33: Navigation

    Navigation FACTORY SETTING Factory set values are marked with *. S1256PC has a touchscreen where you simply navigate by pressing and dragging with your finger. SELECT Most options and functions are activated by lightly pressing on the display with your finger.
  • Page 34 Current temperature The drop-down menu shows the current status for S1256PC, Set temperature what is in operation and what S1256PC is doing at the mo- Works to set temperature ment. The functions that are in operation are highlighted with a frame.

  • Page 35: Climate Systems And Zones

    This example shows a property with two climate systems (1 and 2, two separate floors) divided into four zones (1-4, four My system different rooms). Temperature and demand-controlled Connection ventilation can be controlled individually for each zone (ac- cessory required). NIBE S1256PC Chapter 8 | Control - Introduction...

  • Page 36: Control - Menus

    If multiple zones in a climate system do not have activated room sensors, these will have the same curve offset. Chapter 9 | Control - Menus NIBE S1256PC...
  • Page 37 Setting range: on/off an even indoor temperature, regardless of the outdoor temperature. It is from this heating curve that S1256PC de- Here, you select the zone to which a sensor will belong. It is termines the temperature of the water to the climate system, possible to connect multiple room sensors to each zone.
  • Page 38 Wait 24 hours before making a new setting, so that Set the minimum temperature on the supply temperature the room temperature has time to stabilise. to the climate system. This means that S1256PC never cal- culates a temperature lower than that set here. MENU 1.30.2 - CURVE, COOLING If there is more than one climate system the setting can be made separately for each system.
  • Page 39 Here, you set the highest supply temperature for the climate system. This means that S1256PC never calculates a tem- perature higher than the one set here. If it feels cold in the house at e.g. -2°C, "outdoor temp. point" is set to "-2" and "change in curve" is...

  • Page 40: Menu 2 - Hot Water

    1 and 90 days. Tick/untick "Activated" to start/switch off the function. When the time has run out, S1256PC returns to the set de- mand mode. Select "Off" to switch off "More hot water". MENU 2.2 - HOT WATER DEMAND...
  • Page 41 "Period" Here, you set the period of time during which the hot water circulation pump will run, by selecting Active days, Start time and Stop time. NOTE Hot water circulation is activated in menu 7.4 "Selectable in/outputs" or via accessory. NIBE S1256PC Chapter 9 | Control - Menus...

  • Page 42: Menu 3 - Info

    Setting range: 1 – 5 years Here, you can see a diagram showing how much energy S1256PC supplies and consumes. You can select which parts of the installation will be included in the log. It is also possible to activate display of indoor and/or outdoor temperature.

  • Page 43: Menu 4 - My System

    You can deselect this function when you do not Setting options: Heating wish to have the cooling running. The operating mode for S1256PC is normally set to "Auto". Caution It is also possible to select operating mode "Add. heat only".
  • Page 44 Setting range: on/off Factor Setting range: 0 – 10 You can select whether you want S1256PC to adjust the in- door climate based on the weather forecast here. You can set factor for outdoor temperature. The higher the value, the greater the effect from the weather forecast.
  • Page 45 Setting options: Price per kWh / CO2 MENU 4.11 - TOOLS If Smart Energy Source™ is activated, S1256PC prioritises how/to what extent each docked energy source will be used. Here, you can find tools for use.
  • Page 46 All settings that are available to the user (including advanced menus) can be reset to default values here. Caution After the factory setting, personal settings such as the heating curve must be reset. Chapter 9 | Control - Menus NIBE S1256PC...

  • Page 47: Menu 5 - Connection

    All settings made since opening the menu can be reset by selecting "Reset". MENU 5.4 – WIRELESS UNITS In this menu you connect wireless units, and manage set- tings for connected units. NIBE S1256PC Chapter 9 | Control - Menus...

  • Page 48: Menu 6 - Scheduling

    If a room sensor is not activated, the desired offset of the heating curve is set. One step is usually enough to change the room temperature by one degree, but in some cases several steps may be required. Chapter 9 | Control - Menus NIBE S1256PC...

  • Page 49: Menu 7 - Installer Settings

    7.9.1 - Change log 7.9.2 - Extended alarm log 7.9.3 - Black box 1 This menu is also shown in any installed subordinate heat pump’s limited menu system. 2 Consult the accessory’s Installer Manual. NIBE S1256PC Chapter 9 | Control - Menus...
  • Page 50 Auto: The heating medium pump runs according to the Heating current operating mode for S1256PC. Auto: Here, you set whether the heating medium pump is Intermittent: The heating medium pump starts approx. 20 to be regulated automatically or manually.
  • Page 51 MENU 7.1.2.7 - PUMP SPEED BRINE Block freq 1 and 2 Make settings for the brine pump's speed here. Setting range start S1256PC-8 start: 25 – 101 Hz Setting range stop S1256PC-8 stop: 30 – 106 Hz Operating mode Setting range: Fixed delta, Auto, Manual...
  • Page 52 1. The compressor in the heat pump Select how you want the S1256PC to alert you that there is stops, if there is only a heating demand.
  • Page 53 Time betw. cooling and heating: Here, you can set how long demand. S1256PC will wait before it returns to heating mode when the cooling demand has ceased or vice versa. If 0 minutes are selected, this means that the demand is not...
  • Page 54 In systems with only one heat Caution pump, S1256PC will be the main unit. If there is another main Higher value on "Start compressor" gives more unit in the installation, you enter the ID that S1256PC will compressor starts, which increase wear on the have.
  • Page 55 Hot water charging with subordinate heat pump NOTE in multi-installation. During active underfloor drying, the heating medi- um pump runs at 100 %, regardless of the setting in menu 7.1.2.2. Pool 1 Pool 2 NIBE S1256PC Chapter 9 | Control - Menus...
  • Page 56 When resetting, the start guide is displayed the next time S1256PC restarts. MENU 7.7 - START GUIDE When S1256PC is started for the first time, the start guide is automatically activated. From this menu, you can start it manually. Chapter 9 | Control - Menus...

  • Page 57: Service

    You can activate the emergency mode both when S1256PC is running and when it is switched off. EP14-QM31 EP14-QM33 To activate when S1256PC is running: press and hold the EP14-QM34 EP14-QM32 on/off button (SF1) for 2 seconds and select "emergency mode"...
  • Page 58 To let in air, slacken off the connection Draining the climate system in the heat pump slightly at the shut-off valve (EP14-QM33) that joins the If S1256PC requires servicing, drain the climate system as heat pump with the cooling module. follows:...
  • Page 59 3. Press in the screw for start help using a screwdriver as illustrated. 4. With the screw pressed in, turn the screwdriver in any direction. 5. Start S1256PC and check that the circulation pump is working. Remove the insulation. 3. Remove the locking plate.
  • Page 60 Menu 8.2 - Logging Setting range: 1 s – 60 min Here you can choose how current measurement values from S1256PC should be saved onto a log file on the USB memory. Set the desired interval between loggings. Select “Start logging".
  • Page 61 Save settings: Here, you save menu settings in order to re- Available registers are shown in the display for the currect store them later or to copy the settings to another S1256PC. product and its installed and activated accessories. Display backup: Here, you save both menu settings and Export register measurement values, e.g.

  • Page 62: Disturbances In Comfort

    "Stop additional heat" function has occurred in menu 7.1.10.2 - "Auto mode setting". that S1256PC cannot remedy itself. On the display, you can – If mode "Manual" is selected, select "Additional heat". see what type of alarm it is and reset it.
  • Page 63 Enter menu 4.1 - "Operating mode". If "Auto" mode is selected, select a higher value for "Stop heating" in – S1256PC does not call on heating, hot water or cooling. menu 7.1.10.2 - "Auto mode setting". • Compressor blocked due to the temperature conditions.

  • Page 64: Accessories

    Part no. 067 538 The room unit is an accessory with a built-in room sensor, which allows the control and monitoring of S1256PC to be carried out in a different part of your home to where it is located. EXHAUST AIR MODULE FLM S45 Part no.

  • Page 65: Technical Data

    Technical data Dimensions * This dimension applies at 90° angle on the brine pipes (side connection). The dimension can vary approx. ±100 mm vertically as the brine pipes consist in part of flexible pipes. NIBE S1256PC Chapter 13 | Technical data...

  • Page 66: Electrical Data

    400V 3N ~ 50Hz Max operating current including 0 kW immersion heater (Recommended fuse rating). 12(16) Max operating current including 0.5 – 6.5 kW immersion heater (Recommended fuse rating). 16(16) Additional power 0.5/1/1.5/2/2.5/3 /3.5/4/4.5/5/5.5/6/6.5 Chapter 13 | Technical data NIBE S1256PC...

  • Page 67: Technical Specifications

    4.2 (42) / 0.3 (3) (bar) Brine circuit Min/max system pressure brine 0.05 (0.5) / 0.45 (4.5) (bar) Flow at Pdesignh 0.43 Max external available press at Pdesignh Min/Max incoming Brine temp °C see diagram NIBE S1256PC Chapter 13 | Technical data...
  • Page 68 2 Scale for the system’s efficiency class room heating: A+++ to G. Reported efficiency for the system takes the product’s temperature regulator into account. 3 Scale for efficiency class hot water: A+ to F. 4 At Delta T=3° 5 Rf: stainless steel, E: enamel 6 With feet removed, the height is approx. 1,950 mm. Chapter 13 | Technical data NIBE S1256PC...
  • Page 69 6 kW nominellt flöde Köldbärare in, temperatur 8 kW, nominal flow 6 kW nominellt flöde 6 kW 2 x nominellt flöde 8 kW, 2 x nominal flow 6 kW 2 x nominellt flöde NIBE S1256PC Chapter 13 | Technical data...

  • Page 70: Energy Labelling

    Seasonal space heating energy efficiency, cold cli- 230 / 169 mate Water heating energy efficiency, cold climate Seasonal space heating energy efficiency, warm 219 / 163 climate Water heating energy efficiency, warm climate Sound power level L outdoors Chapter 13 | Technical data NIBE S1256PC...
  • Page 71 The reported efficiency of the package also takes the controller into account. If an external supplementary boiler or solar heating is added to the package, the overall efficiency of the package should be recalculated. NIBE S1256PC Chapter 13 | Technical data...
  • Page 72 Daily energy consumption 6.329 Daily fuel consumption elec fuel Annual energy consumption 1,331 Annual fuel consumption Contact information NIBE Energy Systems – Box 14 – Hannabadsvägen 5 – 285 21 Markaryd – Sweden Chapter 13 | Technical data NIBE S1256PC...

  • Page 73: Item Register

    Disturbances in comfort, 62 Installation alternative Alarm, 62 Buffer vessel UKV, 16 Manage alarm, 62 Connecting hot water circulation, 15 Troubleshooting, 62 Water heater with immersion heater, 15 Docking alternatives Installation area, 6 Ground water system, 16 Pool, 16 NIBE S1256PC Item register...
  • Page 74 Draining the climate system, 57 Draining the hot water heater, 57 Drawing out the cooling module, 59 Emptying the brine system, 58 Helping the circulation pump to start, 59 Modbus TCP/IP, 61 Temperature sensor data, 59 Item register NIBE S1256PC...

  • Page 75: Contact Information

    Tel: +48 (0)85 66 28 490 Hannabadsvägen 5, 285 21 Markaryd Tel. +41 (0)58 252 21 00 biawar.com.pl Tel: +46 (0)433-27 30 00 info@nibe.ch info@nibe.se nibe.ch nibe.se For countries not mentioned in this list, contact NIBE Sweden or check nibe.eu for more information.
  • Page 76 WS release date: 2023-02-02 17:28 Publish date: 2023-02-15 09:57 This is a publication from NIBE Energy Systems. All product illustrations, facts and data are based on the available information at the time of the publication’s approval. NIBE Energy Systems makes reservations for any factual or printing errors in this publication.

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