Viessmann BWT 241.A Series Installation And Service Instructions Manual
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Viessmann BWT 241.A Series Installation And Service Instructions Manual

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VIESMANN
Installation and service
instructions
for contractors
Vitocal 242-G
Type BWT 241.A06 to A10
Type BWT-M 241.A06 to A10
Compact heat pump, 400 V~ and 230 V~
For applicability, see the last page
VITOCAL 242-G
Please keep safe.
5601 598 GB
4/2011

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Summary of Contents for Viessmann BWT 241.A Series

  • Page 1 VIESMANN Installation and service instructions for contractors Vitocal 242-G Type BWT 241.A06 to A10 Type BWT-M 241.A06 to A10 Compact heat pump, 400 V~ and 230 V~ For applicability, see the last page VITOCAL 242-G Please keep safe. 5601 598 GB 4/2011...

  • Page 2: Safety Instructions

    Safety instructions Safety instructions Please follow these safety instructions closely to prevent accidents and mate- rial losses. Safety instructions explained ■ The Code of Practice of relevant trade associations Danger ■ All current safety regulations as This symbol warns against the defined by DIN, EN, DVGW, VDE and risk of injury.
  • Page 3 Please note Repairing components that fulfil a safety function can compromise the safe operation of your sys- tem. Replace faulty components only with original Viessmann spare parts. Auxiliary components, spare and wearing parts Please note Spare and wearing parts that...
  • Page 4 Index Index Installation instructions Preparing for installation Use........................Requirements concerning on-site connections............ Overview of possible system schemes..............Markings in the system examples................ 10 System example, ID: 4605091_1102_03............. 11 Installation sequence Siting the heat pump.................... 16 Hydraulic connections..................29 Electrical connection.................... 33 Connecting power cables..................
  • Page 5 Index Index (cont.) Cylinder........................ 102 Fitting set......................104 Commissioning/service reports Hydraulic parameters report................. 106 Control parameters report..................106 Specification....................... 111 Declaration of Conformity Declaration of conformity..................117 Keyword index....................118...
  • Page 6 Preparing for installation The compact heat pumps Vitocal 242-G, Any other use is considered inappropri- type BWT 241.A06 to A10, ate. BWT-M 241.A06 to A10, are intended for the following purposes: Note ■ Central heating and cooling via a heat- The Vitocal 242-G is exclusively inten- ing system.
  • Page 7 Preparing for installation Requirements concerning on-site connections < 42 V 230 V~ 400 V~ A DHW D Primary circuit return (heat pump B DHW circulation brine outlet) C Cold water...
  • Page 8 Preparing for installation Requirements concerning on-site connections (cont.) E Primary circuit flow (heat pump G Secondary circuit return (heating brine inlet) water) F Secondary circuit flow (heating H Solar circuit flow K Solar circuit return water) 1. Prepare the connections on the heat- 2.

  • Page 9: Overview Of Possible System Schemes

    Preparing for installation Overview of possible system schemes The following table provides an overview of all possible system schemes. Components System scheme Heating circuit A1 (HC1) — — — M2 (HC2) — — — DHW cylinder — Heating water buffer cylinder —...

  • Page 10: Markings In The System Examples

    Preparing for installation Markings in the system examples -2/145- --2/F14-- --2/F14-- --2/X3.8;3.9-- --2/211.2-- --2/212.3-- -2/211.4- --2/F8-- --A/137--...
  • Page 11 Preparing for installation System example, ID: 4605091_1102_03 Setting system scheme 6 Note ■ Vitocal 242-G with integral DHW cyl- This scheme is a basic example without inder and Vitotronic 200, type WO1B shut-off valves or safety equipment. This ■ Heating circuit distributor with one does not replace the need for local engi- heating circuit without mixer and one neering.

  • Page 12: Equipment Required

    Preparing for installation System example, ID: 4605091_1102_03 (cont.) Equipment required Pos. Designation Heat source Compact heat pump: ■ Integral heat pump control unit ■ Primary pump ■ Secondary pump ■ 3-way diverter valve for "Heating/DHW" ■ Cylinder primary pump ■ DHW cylinder ■...

  • Page 13: Electrical Installation Scheme

    Preparing for installation System example, ID: 4605091_1102_03 (cont.) Pos. Designation Heating circuit with mixer M2 Underfloor heating circuit M2 with mixer controlled by the heat pump control unit Vitotrol 200A remote control Flow temperature sensor VTS Temperature limiter to restrict the maximum temperature of underfloor heating systems ■...
  • Page 14 Preparing for installation System example, ID: 4605091_1102_03 (cont.) KM BUS distributor HK M2 HK A1 HK M2 230 V/ 50 Hz 1 / N / PE 100 W UP M2 VTS M2 PT500 PT500 Ni500 PT500 1 / N / PE 3 / PE 230 V, 50 Hz 400 V, 50 Hz...
  • Page 15 Preparing for installation System example, ID: 4605091_1102_03 (cont.) 3 / N / PE 1 / N / PE 400 V/ 50 Hz 230 V/ 50 Hz Instantaneous heating water heater Instantaneous heating water heater power supply 230 V~ power supply 400 V~ Required parameter settings To call up "Coding level 1"...
  • Page 16 Installation sequence Siting the heat pump Installation room requirements Please note Total weight with full DHW cylinder The installation room must be dry Type BWT/BWT- Weight in kg and free from the risk of frost. Ambient temperatures of 0 to 241.A06 35 ºC must be ensured.
  • Page 17 Installation sequence Siting the heat pump (cont.) Minimum clearances Minimum room height h Installation h in mm ■ Without connection set for 2250 pre-installation/DHW (accessory) ■ With connection set for 2350 pre-installation/DHW (accessory) Observe design information. Vitocal technical guide Handling During handling, the cylinder module can Please note be removed (see from page 18).
  • Page 18 Installation sequence Siting the heat pump (cont.) Removing the cylinder module...
  • Page 19 Installation sequence Siting the heat pump (cont.)
  • Page 20 Installation sequence Siting the heat pump (cont.) 193C 224.6...
  • Page 21 Installation sequence Siting the heat pump (cont.)
  • Page 22 Installation sequence Siting the heat pump (cont.)
  • Page 23 Installation sequence Siting the heat pump (cont.)
  • Page 24 Installation sequence Siting the heat pump (cont.) Removing the heat pump module...
  • Page 25 Installation sequence Siting the heat pump (cont.) 9. 4x Note on step 10: Use heat conducting paste when fitting the sensor after transporting the appli- ance to its installation site.
  • Page 26 Installation sequence Siting the heat pump (cont.) Assembly and sealing faces to note 2. Fit the cylinder module in reverse order to that described on page 18. Please note Make tight hydraulic connec- tions between the heat pump and cylinder modules. With pipe outlets, ensure dia- phragm grommets C are seated correctly (see diagram...
  • Page 27 Installation sequence Siting the heat pump (cont.)

  • Page 28: Removing The Transport Brackets

    Installation sequence Siting the heat pump (cont.) Removing the transport brackets Please note Remove the transport brackets. If transport brackets are not removed, they cause vibrations and excessive noise.

  • Page 29: Hydraulic Connections

    Installation sequence Hydraulic connections Connecting the primary/secondary circuits Connecting the pipe sections or pipe With hose outlets, ensure that bends supplied with the connection their diaphragm grommets are set (accessories) seated correctly; seal with seal- ing tape if required (see chapter Please note "Assembly and sealing faces to Ensure hydraulic connections are...
  • Page 30 Installation sequence Hydraulic connections (cont.) Connecting the primary circuit Connecting the secondary circuit Please note The components used must be resistant to the heat transfer medium. Never use zinc-plated pipes. 1. Equip the primary circuit with an expansion vessel and safety valve (in accordance with DIN 4757).

  • Page 31: Connections On The Dhw Side

    Installation sequence Hydraulic connections (cont.) 3. Thermally insulate pipes inside the Note building. ■ For underfloor heating circuits, install a temperature limiter to restrict the maximum temperature in the under- floor heating system (see chapter "Connecting a temperature limiter as a maximum temperature limiter in underfloor heating systems").

  • Page 32: Connecting The Solar Circuit

    Installation sequence Hydraulic connections (cont.) Information on drinking water filter Recommendation: Install the safety According to DIN 1988-2, a drinking valve higher than the top edge of the cyl- water filter should be installed in systems inder. This protects the valve against with metal pipework.

  • Page 33: Electrical Connection

    Installation sequence Electrical connection Routing cables to the connection area Danger Cables: Damaged cable insulation can ■ Required pipe length inside the appli- cause injury and damage to the ance plus wall clearance appliance. 2.25 m Route cables so that they cannot ■...
  • Page 34 Installation sequence Electrical connection (cont.) 400/230 V < 42 V < 4 0 / 2 Overview of the heat pump control unit electrical connections Note ■ Route 230 V~ cables and LV cables separately and bundle them tightly together at the terminals. This ensures that, in case of failure, for example when detaching a wire, the wires can- not drift into the adjacent voltage area.
  • Page 35 Installation sequence Electrical connection (cont.) 400 V / 230 V / 50 Hz 50 Hz A Expansion PCB on main PCB...
  • Page 36 Installation sequence Electrical connection (cont.) B Main PCB E Luster terminals F3 Fuse 6.3A (slow) F1 Fuse 6.3A (slow) C Controller and sensor PCB F Control module for instantaneous D Mains terminals heating water heater Main PCB Information regarding the connection Set the required parameters during com- values missioning;...
  • Page 37 Installation sequence Electrical connection (cont.) Function components 230 V~ Plug sYA Terminals Function Explanation 211.1 Primary pump Connection values ■ Output: 200 W ■ Voltage: 230 V~ ■ Max. switching current: 4(2) A Connected at the factory. 211.2 Secondary pump ■...
  • Page 38 Installation sequence Electrical connection (cont.) Plug sYS Terminals Function Explanation 212.2 Heating circuit pump, heat- ■ This pump is connected in addition to ing circuit without mixer the secondary pump if a heating water (A1) buffer cylinder is installed. ■ Connect temperature limiter as maxi- mum temperature limiter for underfloor heating circuit (if installed) in series (see the following chapter)
  • Page 39 Installation sequence Electrical connection (cont.) Connecting a temperature limiter as a maximum temperature limiter for under- floor heating Connecting a general temperature Connecting the temperature limiter, limiter B part no. 7151 728, 7151 729 B X2.N X2.N sÖ Heating circuit without mixer A1/ Connection Circulation pump C A to control...
  • Page 40 Installation sequence Electrical connection (cont.) Connecting the temperature limiter, part no. 7151 728, 7151 729 B to mixer extension kit sÖ sÖ A Connect plug sÖ to mixer extension B Temperature limiter C Heating circuit pump for heating cir- cuit with mixer Expansion PCB on main PCB Make no on-site connections.
  • Page 41 Installation sequence Electrical connection (cont.) Message and safety connections Terminals Function Explanation Heat pump control unit 6.3 A (slow) fuse X3.1 Phase switched. Via control unit ON/OFF switch. Note Observe the total load (1000 W) of all con- nected components. X3.3 Flow limiter, well circuit.
  • Page 42 Installation sequence Electrical connection (cont.) Terminals Function Explanation X3.8 Pressure switch, primary Floating contact required: X3.9 circuit ■ Closed: Safety chain has continuity and/or ■ Open: Safety chain interrupted; heat pump shut down ■ Breaking capacity 230 V~, 0.15 A On-site connection: ■...

  • Page 43: Connecting Power Cables

    Installation sequence Electrical connection (cont.) Plug Sensor Type KM BUS Connection of the components on site (interchangeable wires). If several of the following devices are to be con- nected, use a KM BUS distributor (accessory). ■ Extension kit for one heating circuit with mixer M2 ■...
  • Page 44 Installation sequence Connecting power cables (cont.) Danger ■ The allocation of the power-OFF (for An absence of component earth- compressor and/or instantaneous ing in the system can lead to seri- heating water heater) is made via the ous injury from electrical current type of connection and by setting if an electrical fault occurs.
  • Page 45 Installation sequence Connecting power cables (cont.) Heat pump control unit power supply (230 V~) ■ Max. fuse rating 16 A max.16 A ■ Standard tariff (no optional economy X3.18 1/N/PE tariff with power-OFF for the heat X2.1 230 V / 50 Hz pump control unit) X1.1 ■...

  • Page 46: Instantaneous Heating Water Heater Power Supply

    Installation sequence Connecting power cables (cont.) Instantaneous heating water heater power supply 400 V~ 400 V / 50 Hz ■ Max. fuse rating 16 A (see specifica- 3/N/PE tion). ■ Low tariff and power-OFF can be used. ■ Recommended power cable: 5 x 2.5 mm Max.
  • Page 47 Installation sequence Connecting power cables (cont.) Note Observe the technical connection condi- tions of the relevant power supply util- ity. X3.7 X3.6 X3.18/X2.1/X1.1 (400 V~) 7 (230 V~) ≈ Diagram excluding fuses and RCD. A Heat pump control unit F Backup fuse ripple control receiver B Instantaneous heating water heater G Ripple control receiver (contact open: power-OFF enabled)
  • Page 48 Installation sequence Connecting power cables (cont.) Note Observe the technical connection condi- tions of the relevant power supply util- ity. X3.7 X3.6 X3.18/X2.1/X1.1 5 (400 V~) (230 V~) ≈ Diagram excluding fuses and RCD A Heat pump control unit G Ripple control receiver (contact B Instantaneous heating water heater open: power-OFF enabled) with C Compressor...
  • Page 49 Installation sequence Connecting power cables (cont.) Version 1 A Over/undervoltage in % B Phase asymmetry in % <>U <>U C Switching delay in s D Contact used in safety chain (N/O) E ON/OFF indicator ("Rel") F Fault display phase failure/phase sequence ("Ph") G Fault display asymmetry ("Asy") H Fault display over/undervoltage...
  • Page 50 Installation sequence Connecting power cables (cont.) Version 2 N 11 21 LEDs explained A Voltage "U": Illuminates green if voltage is L1 L2 L3 applied. B Relay "R": Illuminates yellow if the phase sequence is correct. Does not illuminate if the phase sequence is incorrect.

  • Page 51: Closing The Heat Pump

    Installation sequence Closing the heat pump Please note Seal the appliance so it is sound- proof and diffusion-proof. Check tightness of internal hydraulic connections. Please note To prevent the formation of con- densate and the excessive devel- opment of noise, tightly seal the shield.

  • Page 52: Steps - Commissioning, Inspection And Maintenance

    Commissioning, inspection, maintenance Steps - commissioning, inspection and maintenance For further information regarding the individual steps, see the page indicated Commissioning steps Inspection steps Maintenance steps Page • • • 1. Opening the heat pump..........53 • 2. Writing reports..............53 •...

  • Page 53: Writing Reports

    Commissioning, inspection, maintenance Further details regarding the individual steps Opening the heat pump Danger Please note Contact with 'live' components Wait at least 30 min between the can lead to severe injury from installation and commissioning of electric current. the appliance to prevent equip- Never touch terminal areas ment damage.

  • Page 54: Checking The Refrigerant Circuit For Leaks

    Filling and venting on the primary side Please note 2. Fill the primary circuit with To prevent equipment damage, Viessmann heat transfer medium fill the primary circuit before con- and vent. necting the power supply. 1. Check the pre-charge pressure of the...

  • Page 55: Filling And Venting On The Secondary Side

    The system must be protected pump against frost down to –15 °C. Temperature differential between the Viessmann heat transfer medium is a primary flow and primary return: ready-mixed ethylene glycol-based 3 K to 5 K. medium, for down to –15 °C, contain-...

  • Page 56: Filling And Venting The Solar Circuit

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) 3. Fill (flush) and vent secondary cir- 5. Check the system pressure and top cuit: up with water if required. ■ Open air vent valve (for positions of Minimum system pressure: 0.8 bar air vent valves, drain &...

  • Page 57: Checking The Expansion Vessel And Heating Circuit Pressure

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Checking the expansion vessel and heating circuit pressure Observe design information. Vitocal technical guide Cleaning the DHW cylinder Danger Please note Uncontrolled escape of DHW or Pointed or sharp cleaning heat transfer medium can cause objects scalding and building damage.
  • Page 58 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Please note A short circuit between the mag- nesium anode and internal indi- rect coil increases the protective effect of the magnesium anode and leads to corrosion damage on the DHW cylinder. Before inserting the electrical cables, measure the resistance between terminals A and B.

  • Page 59: Replacing The Magnesium Anode

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Replacing the magnesium anode Note Please note If the magnesium anode needs to be A short circuit between the mag- replaced, a maintenance-free impressed nesium anode and internal indi- current anode (accessory) can be used. rect coil increases the protective effect of the magnesium anode For removal of the magnesium anode,...
  • Page 60 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Switch on the ON/OFF switch on the heat pump control unit. ■ The enquiry "Commissioning Start?" appears automatically on first commissioning. Note The commissioning assistant can also be started manually: For this, hold down the when switching on the heat pump control...
  • Page 61 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Language Date Time Date / time Start commissioning? Parameter group Parameter Programming level 1 select Sensor values Temperature sensors display Signal inputs Signal inputs display Actuator test Actuator test carry out Subscriber check Subscriber check LON carry out...
  • Page 62 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Commissioning without the commissioning assistant Enabling the service menu Service menu: 1. Press OK + å simultaneously for The service menu can be enabled from approx. 4 s any menu. 2.
  • Page 63 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Pumps and other components Pump/component Parameter Setting Heating circuit pump A1/ "System definition" Ó With heating circuit A1 (for HC1 (in conjunction with heating circuit without mixer "System scheme 7000" heating water buffer cyl- A1/HC1) inder in addition to the...
  • Page 64 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) External functions External functions Parameter Setting External demand "Internal hydraulics", if Set flow temperature applicable Ó for external demand "Flow temperature for external demand 730C" External starting of the com- "System definition"...
  • Page 65 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Solar Solar parameters Setting "Solar" Ó "4" "Type solar control unit 7A00" "Solar" Ó Specify the value calculated from "Flow rate solar circuit for calculating solar the set pump rate of the solar cir- yield 7A07"...

  • Page 66: Instructing The System User

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Checking the system function (e.g. actuators, temperatures, poss. heat meter) Please note If the heat pump is subjected to temperatures below –15 °C, for example during storage or trans- port, the high limit safety cut-out of the instantaneous heating water heater may respond.

  • Page 67: Overview Of Electrical Connections

    Troubleshooting Repairs Overview of electrical connections Type BWT (400 V~)
  • Page 68 Troubleshooting Repairs (cont.) Compressor contactor Type BWT 241.A08, A10: Full wave soft starter Cable channel Motor overload relay 3 rows of luster terminals Plug, secondary pump Controller and sensor PCB Plug, primary pump Programming unit Plug, compressor Main PCB Plug, 3-way diverter valve Expansion PCB on main PCB aYH Plug, pressure switch Compressor power supply...
  • Page 69 Troubleshooting Repairs (cont.) Type BWT-M (230 V~)
  • Page 70 Troubleshooting Repairs (cont.) Compressor contactor Motor overload relay Cable channel Run capacitor 3 rows of luster terminals Start capacitor Controller and sensor PCB Plug, secondary pump Programming unit Plug, primary pump Main PCB Plug, compressor Expansion PCB on main PCB Plug, 3-way diverter valve Compressor power supply aYH Plug, pressure switch...
  • Page 71 Troubleshooting Repairs (cont.) Opening programming unit...
  • Page 72 Troubleshooting Repairs (cont.) Removing cover from programming unit, if necessary...

  • Page 73: Overview Of Internal Components

    Troubleshooting Repairs (cont.) Overview of internal components 193C 116.1 116.2 116.5 116.3 116.6 116.4...
  • Page 74 Troubleshooting Repairs (cont.) Flow temperature sensor, secon- a:DC Cylinder primary pump dary circuit Primary circuit air vent valve Cylinder temperature sensor Condenser drain valve Return temperature sensor, solar Schrader high pressure valve circuit Primary pump drain valve Flow temperature sensor, pri- Drain valve on the secondary mary circuit (heat pump brine side...

  • Page 75: Checking Sensors

    Troubleshooting Repairs (cont.) Cylinder drain & fill valve positions A Cylinder drain & fill valve closed C Cylinder drain & fill valve open to B Cylinder drain & fill valve open to drain or fill the cylinder drain the internal DHW line Draining the heat pump on the secondary side 1.

  • Page 76: Checking The Fuses

    Troubleshooting Repairs (cont.) Sensor Capturing ele- ment ■ Outside temperature sensor (F0) Ni 500 ■ Flow temperature sensor, cooling circuit (direct heating circuit A1/HC1 or separate cooling circuit SKK) (F14) ■ Room temperature sensors ■ Buffer temperature sensor (F4) Pt 500 ■...
  • Page 77 Troubleshooting Repairs (cont.) Danger Removing the fuse does not Contact with 'live' components switch the power circuit to zero can lead to severe injury from volt. electric current. Before working on the equip- ment, always ensure that the power circuit is also at zero volt.
  • Page 78 Parts lists type BWT (400 V~) Parts lists type BWT (400 V~) Ordering individual parts The following information is required: Standard parts are available from your ■ Serial no. (see type plate A) local dealer. ■ Assembly (from this parts list) ■...
  • Page 79 Parts lists type BWT (400 V~) Overview of the assemblies A Type plate D Assembly, heat pump module B Assembly, casing E Assembly, hydraulics C Assembly, electrical equipment F Assembly, cylinder...

  • Page 80: Parts Not Shown

    0001 Front panel, top 0006 Top panel, back 0002 Front panel, bottom 0007 Support, heat pump control unit 0003 Side panel, left 0008 Viessmann logo 0004 Side panel, right 0009 Screws (set) 0005 Top panel, front 0010 Fixing parts (set)
  • Page 81 Parts lists type BWT (400 V~) Casing (cont.) 0003 0006 0005 0001 0008 0004 0007 0009 0002 0010...

  • Page 82: Electrical Equipment

    Parts lists type BWT (400 V~) Electrical equipment Type BWT 241.A06 0001 Programming unit 0046 Control module for instantaneous 0002 Controller/sensor PCB with cover heating water heater (CU401) 0048 Expansion PCB with cover 0003 Main PCB with cover (MB761) (SA135) 0004 Coding card 0007 Main support, controller/sensor Parts not shown...
  • Page 83 Parts lists type BWT (400 V~) Electrical equipment (cont.) 0016 0015 0017 0001 0040 0039 0004 0048 0003 0008 0002 0007 0041 0025 0009 0036 0046 0029 0031 0030 0026 0023 0024 0022 0023 0024 0025 0026 0042 0044 0043...
  • Page 84 Parts lists type BWT (400 V~) Electrical equipment (cont.) Type BWT 241.A08, A10 0001 Programming unit 0047 Service instructions 0002 Controller/sensor PCB with cover Vitotronic 200, type WO1B (CU401) 0048 Operating instructions 0003 Main PCB with cover (MB761) Vitotronic 200, type WO1B 0004 Coding card 0007 Main support, controller/sensor Parts not shown...
  • Page 85 Parts lists type BWT (400 V~) Electrical equipment (cont.) 0016 0015 0017 0001 0041 0040 0004 0044 0003 0008 0002 0007 0042 0034 0009 0037 0046 0029 0031 0022 0030 0026 0025 0024 0023 0024 0025 0034 0043 0048 0047...

  • Page 86: Heat Pump Module

    Parts lists type BWT (400 V~) Heat pump module 0001 Compressor 0025 Primary return hose 0002 Evaporator 0026 Primary flow line 0003 Condenser 0027 Primary flow hose 0004 Thermal expansion valve TEV 0028 Secondary return hose 0005 Filter drier DML 0029 Line filter drier –...
  • Page 87 Parts lists type BWT (400 V~) Heat pump module (cont.) 0045 0028 0024 0003 0039 0039 0016 0039 0034 0039 0006 0032 0023 0016 0014 0035 0012 0025 0034 0038 0011 0036 0043 0014 0013 0017 0042 0010 0005 0016 0043 0018 0026...
  • Page 88 Parts lists type BWT (400 V~) Hydraulics 0001 Back panel, lower casing 0023 Heat exchanger for primary store 0002 Bottom panel system 0003 Anti-vibration mount 0024 Line, instantaneous heating water 0004 Top panel, lower casing heater – secondary pump 0005 Angle profile, lower casing, left 0025 Pipe bend, DHW flow 0006 Angle profile, lower casing, right 0026 Connection line, heating water...
  • Page 89 Parts lists type BWT (400 V~) Hydraulics (cont.) 0039 0004 0021 0039 0036 0035 0014 0034 0035 0023 0034 0041 0026 0034 0034 0036 0036 0026 0010 0034 0037 0037 0008 0015 0036 0036 0034 0028 0015 0025 0036 0036 0034 0037 0034...
  • Page 90 Parts lists type BWT (400 V~) Cylinder 0001 Primary store, 220 litre 0019 Cap G¾ with retaining loop 0002 Back panel, upper casing 0020 Magnesium chain anode 0003 Retaining bracket, cylinder 0021 Safety equipment block 0004 Cold water line 0022 Non-return valve 30 mbar, con- 0005 Connector, DHW line nection G1 0006 Connection line, check valve –...
  • Page 91 Parts lists type BWT (400 V~) Cylinder (cont.) 0005 0011 0032 0017 0012 0032 0013 0015 0036 0021 0014 0004 0032 0017 0014 0032 0032 0031 0034 0003 0029 0013 0002 0030 0035 0028 0001 0027 0032 0033 0035 0032 0018 0016 0006...

  • Page 92: Parts Lists Type Bwt-M (230 V~)

    Parts lists type BWT-M (230 V~) Parts lists type BWT-M (230 V~) Ordering individual parts The following information is required: Standard parts are available from your ■ Serial no. (see type plate A) local dealer. ■ Assembly (from this parts list) ■...
  • Page 93 Parts lists type BWT-M (230 V~) Overview of the assemblies A Type plate D Assembly, heat pump module B Assembly, casing E Assembly, hydraulics C Assembly, electrical equipment...

  • Page 94: Overview Of The Assemblies

    0001 Front panel, top 0006 Top panel, back 0002 Front panel, bottom 0007 Support, heat pump control unit 0003 Side panel, left 0008 Viessmann logo 0004 Side panel, right 0009 Screws (set) 0005 Top panel, front 0010 Fixing parts (set)
  • Page 95 Parts lists type BWT-M (230 V~) Casing (cont.) 0003 0006 0005 0001 0008 0004 0007 0009 0002 0010...
  • Page 96 Parts lists type BWT-M (230 V~) Electrical equipment 0001 Programming unit 0048 Control module for instantaneous 0002 Controller/sensor PCB with cover heating water heater (CU401) 0052 Expansion PCB with cover 0003 Main PCB with cover (MB761) (SA135) 0004 Coding card 0007 Main support, controller/sensor Parts not shown 0005 PCB with connection adaptor...
  • Page 97 Parts lists type BWT-M (230 V~) Electrical equipment (cont.) 0016 0015 0017 0001 0043 0042 0004 0052 0003 0008 0002 0007 0044 0028 0009 0039 0048 0031 0022 0033 0032 0024 0037 0023 0027 0026 0025 0026 0027 0028 0045 0047 0046...
  • Page 98 Parts lists type BWT-M (230 V~) Heat pump module 0001 Compressor 0025 Primary return hose 0002 Evaporator 0026 Primary flow line 0003 Condenser 0027 Primary flow hose 0004 Thermal expansion valve TEV 0028 Secondary return hose 0005 Filter drier DML 0029 Line filter drier –...
  • Page 99 Parts lists type BWT-M (230 V~) Heat pump module (cont.) 0045 0028 0024 0003 0039 0039 0016 0039 0034 0039 0006 0032 0023 0016 0014 0035 0012 0025 0034 0038 0011 0036 0043 0014 0013 0017 0042 0010 0005 0016 0043 0018 0026...
  • Page 100 Parts lists type BWT-M (230 V~) Hydraulics 0001 Back panel, lower casing 0023 Heat exchanger for primary store 0002 Bottom panel system 0003 Anti-vibration mount 0024 Line, instantaneous heating water 0004 Top panel, lower casing heater – secondary pump 0005 Angle profile, lower casing, left 0025 Pipe bend, DHW flow 0006 Angle profile, lower casing, right 0026 Connection line, heating water...
  • Page 101 Parts lists type BWT-M (230 V~) Hydraulics (cont.) 0039 0004 0021 0039 0036 0035 0014 0034 0035 0023 0034 0041 0026 0034 0034 0036 0036 0026 0010 0034 0037 0037 0008 0015 0036 0036 0034 0028 0015 0025 0036 0036 0034 0037 0034...
  • Page 102 Parts lists type BWT-M (230 V~) Cylinder 0001 Primary store, 220 litre 0019 Cap G¾ with retaining loop 0002 Back panel, upper casing 0020 Magnesium chain anode 0003 Retaining bracket, cylinder 0021 Safety equipment block 0004 Cold water line 0022 Non-return valve 30 mbar, con- 0005 Connector, DHW line nection G1 0006 Connection line, check valve –...
  • Page 103 Parts lists type BWT-M (230 V~) Cylinder (cont.) 0005 0011 0032 0017 0012 0032 0013 0015 0036 0021 0014 0004 0032 0017 0014 0032 0032 0031 0034 0003 0029 0013 0002 0030 0035 0028 0001 0027 0032 0033 0035 0032 0018 0016 0006...

  • Page 104: Fitting Set

    Parts lists type BWT-M (230 V~) Fitting set 0001 Flange for magnesium anode 0004 T&P valve 0002 Magnesium anode 0005 Extension R½ x 30 0003 Flange gasket 0006 Flange insulation...
  • Page 105 Parts lists type BWT-M (230 V~) Fitting set (cont.) 0004 0005 0006 0001 0002 0003 0003 0002...

  • Page 106: Hydraulic Parameters Report

    Commissioning/service reports Hydraulic parameters report Setting and test values Set value Commission- Frost protection (brine medium) °C – 15 Testing the external heating circuit pumps Circulation pump type Circulation pump stage Overflow valve setting Primary circuit commissioning Primary circuit flow temperature °C Primary circuit return temperature °C...
  • Page 107 Commissioning/service reports Control parameters report (cont.) Parameter Code Delivered condi- Commis- tion sioning System definition System scheme (see chapter "Overview 7000 of possible system schemes") Temperature differential for calculating 7003 40 (≙ 4 K) the heating limit Temperature differential for calculating 7004 40 (≙...
  • Page 108 Commissioning/service reports Control parameters report (cont.) Parameter Code Delivered condi- Commis- tion sioning Enable compressor 5100 Set DHW temperature 6000 500 (≙ 50 °C) Min. DHW temperature 6005 100 (≙ 10 °C) Max. DHW temperature 6006 600 (≙ 60 °C) Hysteresis DHW temperature heat pump 6007 70 (≙...
  • Page 109 Commissioning/service reports Control parameters report (cont.) Parameter Code Delivered condi- Commis- tion sioning Internal hydraulics Heat pump for drying a building 7300 Time program for screed drying 7303 Set flow temperature, external demand 730C 500 (≙ 50 °C) Operating mode primary pump 7320 Do not adjust Operating mode secondary pump...
  • Page 110 Commissioning/service reports Control parameters report (cont.) Parameter Code Delivered condi- Commis- tion sioning Cooling Cooling function 7100 Cooling circuit 7101 Set room temperature separate cooling 7102 200 (≙ 20 °C) circuit Min. flow temperature cooling 7103 100 (≙ 10 °C) Influence room temperature hook-up 7104 cooling circuit...

  • Page 111: Specification

    Specification Specification Vitocal 242-G, 400 V Type BWT 241.A06 241.A08 241.A10 Heating output data at 5 K spread (to EN 14511, B0/W35 °C) Rated heating output 10.0 Cooling capacity Power consumption 1.40 1.87 2.35 Coefficient of performance ∊ (COP) Heating output data at 10 K spread (to EN 255, B0/W35 °C) Rated heating output 10.4...
  • Page 112 Specification Specification (cont.) Type BWT 241.A06 241.A08 241.A10 Electrical values, heat pump Rated voltage, compressor 3/PE 400 V/50 Hz Rated current, compressor Starting current, compressor 25.0 14.0 20.0 Starting current, compressor (with 26.0 35.0 48.0 stalled armature) Compressor fuse 1×C16A 1×B16A 1×B16A 3-pole...
  • Page 113 Specification Specification (cont.) Type BWT 241.A06 241.A08 241.A10 Dimensions ■ Total length ■ Total width ■ Total height 2075 2075 2075 Total weight Permiss. operating pressure Primary circuit (brine) Secondary circuit heating water Secondary circuit DHW 10.0 10.0 10.0 Solar circuit Connections Primary flow and return (brine) Cu 28 x 1...
  • Page 114 Specification Specification (cont.) Type BWT-M 241.A06 241.A08 241.A10 Primary circuit (brine) Capacity Minimum flow rate at a spread of 1120 1450 5 K (always maintain) Maximum external pressure drop mbar (RFH) at minimum flow rate Max. inlet temperature °C Min. inlet temperature °C –5 –5...
  • Page 115 Specification Specification (cont.) Type BWT-M 241.A06 241.A08 241.A10 Power consumption ■ Primary pump at stage 1/2/3 81/113/151 ■ Secondary pump at stage 1/2/3 62/92/132 ■ Cylinder primary pump PWM 31 – 88 Max. power consumption, control 1000 1000 1000 unit Rated output, control unit/PCB Refrigerant circuit Refrigerant...
  • Page 116 Specification Specification (cont.) Type BWT-M 241.A06 241.A08 241.A10 Connections Primary flow and return (brine) Cu 28 x 1 Heating flow and return Cu 28 x 1 Cold water, DHW ¾ DHW circulation Solar flow and return 20 (multi connect system) Sound power level (Test with reference to DIN EN 12102/ DIN EN ISO 9614-2)

  • Page 117: Declaration Of Conformity

    Declaration of Conformity Declaration of conformity We, Viessmann Werke GmbH & Co KG, D-35107 Allendorf, declare as sole respon- sible body that the product Vitocal 242-G, incl. Vitotronic 200, type WO1B heat pump control unit complies with the following standards: DIN 7003 EN 61 000-3-2;...
  • Page 118 Keyword index Keyword index Connection Adjustable feet........16 ■ At control unit........34 Aligning the appliance......16 ■ Cooling circuit.........32 Ambient temperatures......16 ■ DHW..........31 Appliance fuse........76 ■ Electrical.........33 Appliance too noisy......77 ■ Hydraulic.........29 Assembly.......26, 78, 92 ■ Overview...........7 ■ Primary circuit.........29 ■ Secondary circuit......29, 30 Brine pressure switch......50 ■...

  • Page 119: Keyword Index

    Keyword index Keyword index (cont.) Cylinder module External changeover in operating status ■ Fitting..........26 ■ Parameter settings......64 ■ Removing........18 External demand Cylinder temperature sensor....76 ■ Parameter settings......64 External extension H1......63 External functions......64 Declaration of Conformity....117 External starting of the compressor DHW circulation pump....31, 63 ■...
  • Page 120 Keyword index Keyword index (cont.) Hydraulic connections......29 Hydraulic parameters.......106 Off signal..........47 ON/OFF switch........60 On-site connections......7 Impressed current anode....59 Opening programming unit....71 Inspection...........53 Opening the heat pump....18, 53 Installation room.........16 Operator's log........53 Installation room requirements...16 Outside temperature sensor....76 Instantaneous heating water Overflow valve........31 heater 47, 48...
  • Page 121 Keyword index Keyword index (cont.) Power-OFF Reports ■ Floating contact connection....41 ■ Control parameters.......106 ■ Power supply with load disconnec- ■ Writing commissioning reports..53 tion..........47 Required parameter settings ■ Power supply without on-site load dis- ■ For system schemes......15 connection........46 Reset button Power-OFF signal......46 ■...
  • Page 122 Keyword index Keyword index (cont.) Standard tariff meter....47, 48 System flow temperature sensor..76 Underfloor heating......39 System schemes Underfloor heating circuit....39 ■ Markings.........10 Use............6 ■ Overview...........9 ■ Parameter settings......15 ■ System example......11 Venting ■ Primary side........54 ■ Secondary side.......55 Temperature differential, primary cir- ■...
  • Page 124 Applicability Serial No.: 7452150 7452151 7452152 7452154 7452155 7452156 Viessmann Werke GmbH&Co KG Viessmann Limited D-35107 Allendorf Hortonwood 30, Telford Telephone: +49 6452 70-0 Shropshire, TF1 7YP, GB Fax: +49 6452 70-2780 Telephone: +44 1952 675000 www.viessmann.com Fax: +44 1952 675040...

This manual is also suitable for:

Bwt-m 241.a seriesVitocal 242-gBwt 241.a06Bwt 241.a10Bwt-m 241.a06Bwt-m 241.a10

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