Viessmann BW 35 .AHT PW Series Installation And Service Instructions Manual
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Viessmann BW 35 .AHT PW Series Installation And Service Instructions Manual

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Viesmann
Installation and service instructions
for contractors
Vitocal 350-HT Pro
Type BW 352.AHT058PW to BW 353.AHT147PW
Type BW 352.AHT058SA to BW 353.AHT147SA
Brine/water heat pumps with electric drive, 2 and 3-stage
For applicability, see the last page
VITOCAL 350-HT PRO
Please keep safe.
5801 521 GB
6/2017

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  • Page 1 Viesmann Installation and service instructions for contractors Vitocal 350-HT Pro Type BW 352.AHT058PW to BW 353.AHT147PW Type BW 352.AHT058SA to BW 353.AHT147SA Brine/water heat pumps with electric drive, 2 and 3-stage For applicability, see the last page VITOCAL 350-HT PRO Please keep safe.
  • Page 2 Prior to removing covers from the appliances, Replace faulty components only with genuine wait at least 4 minutes until the voltage has Viessmann spare parts. completely dropped out. Safeguard the system against reconnection. ■ Wear suitable personal protective equipment when ■...

  • Page 3: Safety Instructions

    Installing non-authorised components and making non-approved modifications or con- versions can compromise safety and may inva- lidate our warranty. For replacements, use only original spare parts supplied or approved by Viessmann.
  • Page 4 Index Index 1. Safety and liability Heat pump application limits ..............Occupational safety ................Electrical connections ................. ■ Work on the heat pump ..............■ Work on the refrigerant circuit ............. ■ Work on the casing ................■ 2. Information Disposal of packaging ................
  • Page 5 Index Index (cont.) Overview of electrical components ............53 Overview of internal components ............54 Draining the heat pump on the primary/secondary side ......55 Checking sensors .................. 55 Temperature sensors ................55 ■ Pressure sensors ................56 ■ Checking fuses ..................56 Unlocking the safety high pressure switch ..........

  • Page 6: Heat Pump Application Limits

    Safety and liability Heat pump application limits Intended use Generation of cooling and/or heating ■ For operation in industry, commerce, property development ■ with enclosed boiler room For power supply systems up to 1000 A and 400 V ■ System limit See P&I diagram, connection and wiring diagram Service life Heat pump...

  • Page 7: Safety And Liability

    Safety and liability Occupational safety (cont.) Danger Danger Contact with live components can lead to seri- The absence of component earthing can result ous injury from electric current. Some compo- in serious injury from electrical current and in nents on PCBs remain live even after the power component damage in the event of an electrical supply has been switched off.
  • Page 8 Safety and liability Occupational safety (cont.) Work on the casing Danger Breaking through the knockouts on the back panel leaves behind sharp edges that can lead to life threatening injuries. ■ Finish and seal the edges appropriately before installation. Note Damage to the surfaces of the casing can lead to cor- rosion.

  • Page 9: Disposal Of Packaging

    Please dispose of packaging waste in line with statu- tory regulations. DE: Use the disposal system organised by Viessmann. AT: Use the ARA statutory disposal system (Altstoff Recycling Austria AG, licence number 5766). CH: Packaging waste is disposed of by the HVAC contractor.

  • Page 10: Product Information

    Information Intended use (cont.) Any use that differs from or goes beyond this is consid- Note ered inappropriate. The Vitocal 350-HT Pro must be operated exclusively by authorised and trained personnel. Product information Vitocal 350-HT Pro Heat pump Vitocal 350-HT Pro, type BW Starting system Part winding Soft start...

  • Page 11: Preparing For Installation

    See page 45. Unloading and handling Note Viessmann (Switzerland) AG accepts no liability for Before unloading, have the recipient check the con- any damage resulting from incorrect handling. signment for damage. Note down any damage on the delivery note and notify the haulage contractor.
  • Page 12 Preparing for installation Transport and siting requirements (cont.) Handling by crane Fig. 1 Lifting shackle attachment points Belt strap suitable for the weight (see page 13) Edge protection (e.g. 2 or 3 layers of corrugated cardboard) Cross beam to relieve the load on the frame Note Lifting with belt straps is only permitted without the side, front or back panels fitted.

  • Page 13: Installation Room Requirements

    Preparing for installation Transport and siting requirements (cont.) Note Transport by forklift truck is only permitted without the side, front and back panels fitted. Installation room requirements Please note ■ To prevent the transmission of structure-borne noise, Unfavourable ambient conditions can lead to never site the appliance above ceilings with wooden malfunctions and appliance damage.
  • Page 14 The EC safety datasheet for R1234ze can be obtained designing and constructing: from the Technical Services department of Viessmann Only operate the equipment in a room without con- ■ Werke.

  • Page 15: Minimum Clearances

    Preparing for installation Transport and siting requirements (cont.) Minimum clearances Note When siting cascades, observe the relevant minimum clearances. ≥ 850 ≥ 850 Fig. 3 Cable entries On-site strain relief clamps required (wall clear- ance ≥ 80 mm). If using hydraulic connection accessories (connec- tion set and Victaulic flange adaptor set, 2½"...
  • Page 16 Preparing for installation Transport and siting requirements (cont.) Pressure points of the heat pump feet Types BW 352.AHT058, BW 352.AHT071, Types BW 353.AHT126 and BW 353.AHT147 BW 352.AHT084, BW 352.AHT096 and 2800 BW 352.AHT119 2100 Fig. 6 Fig. 5 Pressure point, foot ê...

  • Page 17: Requirements For On-Site Connections

    Preparing for installation Requirements for on-site connections Dimensions Vitocal 350-HT Pro Types BW 352.AHT058, BW 352.AHT071 and BW 352.AHT084 400 V~ 230 V~ 2153 Fig. 7 Air discharge Air intake Primary circuit flow (primary inlet) Primary circuit return (primary outlet) Secondary circuit flow Secondary circuit return...
  • Page 18 Preparing for installation Requirements for on-site connections (cont.) Types BW 352.AHT096 and BW 352.AHT119 400 V~ 230 V~ 2153 Fig. 8 Air outlet (fan diameter: 150 mm) Air intake Primary circuit flow (primary inlet) Primary circuit return (primary outlet) Secondary circuit flow Secondary circuit return...
  • Page 19 Preparing for installation Requirements for on-site connections (cont.) Types BW 353.AHT126 and BW 353.AHT147 400 V~ 230 V~ 2816 Fig. 9 Air outlet (fan diameter: 150 mm) Primary circuit return (primary outlet) Air intake Secondary circuit flow Primary circuit flow (primary inlet) Secondary circuit return Hydraulic connection requirements Make on-site hydraulic connections stress-free.

  • Page 20: Hydraulic Connections

    Preparing for installation Hydraulic connection requirements (cont.) Hydraulic connections General hydraulic scheme Fig. 10 Control extension residual heat (part no. ZK02826) Control extension well circuit/groundwater Control extension DHW heating (part no. ZK02828) (part no. ZK02829) Control extension geothermal probe (part no. ZK02827) Control extension AC/NC cooling (part no.
  • Page 21 Preparing for installation Hydraulic connection requirements (cont.) Pos. Designation Pos. Designation Safety assembly, primary circuit Heat exchanger cooling Pressure switch, primary circuit Cooling water temperature sensor Separating heat exchanger Coolant buffer cylinder Flow switch Cooling water circulation pump Filter Buffer temperature sensor, top Circulation pump Buffer temperature sensor, bottom Room temperature sensor...
  • Page 22 Preparing for installation Hydraulic connection requirements (cont.) Hydraulic connection, groundwater Required equipment Pos. Designation Heat pump Heat pump control unit Primary pump Outside temperature sensor Expansion vessel Safety assembly, primary circuit Pressure switch, primary circuit Separating heat exchanger Flow switch Filter, groundwater Circulation pump Fig.
  • Page 23 Preparing for installation Hydraulic connection requirements (cont.) Hydraulic connection, low temperature maintenance Note Note In order to keep within application limits, low tempera- The maximum line length in the circuit is 10 m. ture maintenance is also required as soon as the flow temperature (primary inlet) exceeds 48 °C.
  • Page 24 Preparing for installation Hydraulic connection requirements (cont.) Hydraulic connection, heat exchanger "natural cooling" and "active cooling" Required equipment Pos. Designation Heat pump Heat pump control unit Primary pump Outside temperature sensor Expansion vessel Safety assembly, primary circuit Pressure switch, primary circuit Fig.
  • Page 25 Preparing for installation Hydraulic connection requirements (cont.) Hydraulic connection, heat exchanger for residual heat Fig. 19 Required equipment Pos. Designation Pos. Designation 3-way diverter valve, residual heat Heat pump Motorised 2-way valve (dry cooler shut-off) Heat pump control unit Motorised 2-way valve (geothermal probe shut- Secondary pump off) Outside temperature sensor...
  • Page 26 Preparing for installation Hydraulic connection requirements (cont.) Required equipment Pos. Designation Heat pump: Heat pump control unit 3-way diverter valve, "central heating/DHW heating" Secondary pump Outside temperature sensor Safety assembly, secondary circuit Expansion vessel DHW cylinder Cylinder temperature sensor Immersion heater Cylinder loading pump Heat exchanger, cylinder loading system Flow limiter...

  • Page 27: Siting The Heat Pump

    Installation sequence Siting the heat pump Remove the top panel See page 53. Levelling the heat pump Fig. 21 Site and level the heat pump horizontally as described on page 13 onwards.

  • Page 28: Removing The Transport Brackets

    Installation sequence Siting the heat pump (cont.) Removing the transport brackets Please note If transport brackets are not removed, they cause vibrations and excessive noise. Remove all 4 transport brackets fully and dis- pose of correctly. Fig. 22 Transport locking screws Fitting the back panel, side panels and kicking plates Note Please note...
  • Page 29 Note To prevent scratches, cover the panels with cardboard and plastic. The cardboard and plastic should be of the required quality to meet requirements. Viessmann accepts no liability for any damage to the heat pump incurred during installation. Fig. 23...
  • Page 30 Installation sequence Making the hydraulic connections Overview of hydraulic connections Fig. 24 Flow, primary circuit (brine inlet) Flow, secondary circuit Return, primary circuit (brine outlet) Return, secondary circuit Connecting the Vitocal 350-HT Pro Installation accessories Technical guide Use of the Victaulic 2½" (DN 65) or 3" (DN 80) flange adaptor set (accessory) Fig.

  • Page 31: Connecting The Secondary Circuit

    2. Ensure adequate thermal and anti-vibration insula- als. tion of all pipes routed through walls. 5. Fill the primary circuit with Viessmann heat transfer medium and vent. Connecting the secondary circuit 1. Equip the secondary circuit on site with an expan- sion vessel and safety assembly (in accordance with DIN 4757).
  • Page 32 Installation sequence Making the hydraulic connections (cont.) 2. Connect the secondary lines to the heat pump. 3. Fill and vent the secondary circuit in line with VDI 2035. Please note Mechanically loaded hydraulic connections 4. Thermally insulate lines inside the building. lead to leaks, vibration and appliance dam- age.

  • Page 33: Electrical Connections

    Installation sequence Casing ventilation (cont.) Position of refrigerant sensor Fig. 27 Refrigerant sensor Electrical connections Routing cables to the heat pump wiring chamber Danger When routing on-site power cables, observe the loca- Damaged cable insulation can cause injury and tion of the cable entries into the appliance through the damage to the appliance.

  • Page 34: Overview Of Electrical Connections

    Installation sequence Electrical connections (cont.) 400 V~ 230 V~ <50 V Fig. 28 1. Route LV leads through "< 50 V" entry to heat 3. Route power cable for compressor through pump wiring chamber. "400 V~" entry to heat pump wiring chamber. Always secure the power cable with strain relief fit- 2.
  • Page 35 Installation sequence Electrical connections (cont.) Type ... SA (soft start) Fig. 29 Mains isolator Fuse, circulation pump, control extension, residual Load MCB/fuse, compressor 3 heat Load MCB/fuse, compressor 2 Fuse, circulation pump, control extension, DHW heating Load MCB/fuse, compressor 1 Backup fuse, plug-in base system Fuse, circulation pump, control extension, AC/NC Power supply unit 24 V–...
  • Page 36 Installation sequence Electrical connections (cont.) Fig. 30 Power supply powerpack, 3 x 400 V∼/50 Hz Low voltage terminal strip for internal heat pump Terminal strip for external heat pump components components Transformer Control relays for system components Contactors for system components Potential distributor 24 V–...
  • Page 37 Installation sequence Electrical connections (cont.) Type ... PW (part winding) Fig. 31 Mains isolator Fuse, circulation pump, control extension, residual Load fuse, compressor 3 heat Load fuse, compressor 2 Fuse, circulation pump, control extension, DHW heating Load fuse, compressor 1 Fuse, circulation pump, control extension, AC/NC Backup fuse, plug-in base system Power supply unit 24 V–...
  • Page 38 Installation sequence Electrical connections (cont.) Motor overload relay, compressor 2 Motor overload relay, compressor 3 Fig. 32 Power supply powerpack, 3 x 400 V∼/50 Hz Low voltage terminal strip for internal heat pump Terminal strip for external heat pump components components Transformer Control relays for system components...
  • Page 39 Installation sequence Electrical connections (cont.) Terminal strip for external heat pump components Note See position in diagram on page 36 or page 38. Circuit protection from load MCB/fuse 104FC1 (observe the total current of max. 16 A) Terminals Function Explanation 200XD1 Primary pump Connection values...
  • Page 40 Installation sequence Electrical connections (cont.) Circuit protection from load fuse 24 V- 108FC3 (observe the total current of max. 8 A) Terminals Function Explanation 192XD1 Refrigerant sensor Control extension 400XD1 3-way mixing valve, low temperature Connection values maintenance Max. output: 180 VA ■...
  • Page 41 Installation sequence Electrical connections (cont.) Terminals Function Explanation 610XD5 External set value specification, high 0-10 V signal temperature maintenance 630XD1 Messages for BMS, storm ventilation Floating contact Contact closed: Storm ventilation in operation ■ 630XD3 Messages for BMS, heat pump opera- Floating contact tion Contact closed: Heat pump in operation...

  • Page 42: Power Supply

    Installation sequence Electrical connections (cont.) Sensors, external Terminals Analogue inputs and outputs Note 551XD1 Room temperature sensor (plant room) Pt1000 551XD3 Buffer temperature sensor, top Pt1000 551XD5 Buffer temperature sensor, bottom Pt1000 551XD7 Outside temperature sensor Pt1000 807XD1 Return temperature sensor, residual heat (control extension) Pt1000 846XD1...

  • Page 43: Electrical Connection Requirements

    Installation sequence Power supply (cont.) Power supply for control circuit (230 V~) and power circuit (400 V~) Make connection in accordance with the separate "Connection and wiring diagram". Electrical connection requirements Note Note The power connections must be carried out by an ■...
  • Page 44 Installation sequence Power supply (cont.) LED explanation Number of flashes 1 Overload 2 Excess temperature 3 Phase reversal 4 Phase loss / motor not connected 5 Phase asymmetry HOLD TO TEST 6 Short-circuited thyristor 7 Test PUSH TO RESET SMC-3 OVLD SETTING LED STATUS RUN/ON...

  • Page 45: Closing The Heat Pump

    Installation sequence Fitting the shaft and dial for the ON/OFF switch and installing the programming unit Note The shaft and dial for the ON/OFF switch as well as the programming unit are delivered inside the wiring chamber of the heat pump. Only fit the programming unit after all electrical connections have been made.
  • Page 46 Installation sequence Closing the heat pump (cont.) Do all hydraulic connections have airtight sealing Have transport brackets been removed? ■ ■ and insulation with thermal and vapour diffusion- ■ Are the back and side panels securely attached? proof materials? Fig. 35 2.
  • Page 47 Commissioning, inspection, maintenance Steps - commissioning, inspection and maintenance Commissioning steps Inspection steps Maintenance steps Page • • • 1. Opening the heat pump..................... 48 • 2. Compiling reports......................48 • • • 3. Checking the refrigerant circuit for leaks................ 48 •...

  • Page 48: Compiling Reports

    Have your heat pump checked over by a refrigeration engineer. Filling and venting on the primary side Please note 3. Fill the primary circuit with Viessmann heat transfer Commissioning when the primary circuit is medium and vent. empty causes appliance damage.

  • Page 49: Filling And Venting On The Secondary Side

    Commissioning, inspection, maintenance Filling and venting on the secondary side Please note 4. Fill (flush) and vent the secondary circuit. Commissioning when the secondary circuit is empty causes appliance damage. Please note Fill and vent the secondary circuit before con- Leaking hydraulic connections lead to appli- necting the power supply.
  • Page 50 Commissioning, inspection, maintenance Checking the electronic flow switch, type IFM Note The electronic flow switch is only used in the operating mode "water/water with intermediate circuit". The flow switch monitors the minimum flow rate required for operating the heat pump. 1.

  • Page 51: Instructing The System User

    Commissioning, inspection, maintenance Checking the electronic flow switch, type IFM (cont.) Carry out an operating display adjustment (high flow balancing if necessary) High flow balancing establishes the existing (higher) 1. Start the appliance with the existing flow rate. flow rate as the nominal flow rate. For the correspond- 2.

  • Page 52: Excessive Noise

    Troubleshooting Diagnosis Excessive noise Possible causes: Transport bracket not removed ■ ■ Front panel not tightly closed ■ Side panels not securely closed ■ Hydraulic line is touching the heat pump casing (back panel). Hydraulic line not connected free of load and torque ■...

  • Page 53: Overview Of Electrical Components

    Repairs Removing the front panel and top panel Fig. 37 1. Set the ON/OFF switch to OFF or 0. 4. Carefully remove the top panel. 2. Undo both screws on the underside of the front panel. Please note The cables between the programming unit and the wiring chamber can sustain dam- age.
  • Page 54 Repairs Overview of internal components Fig. 38 Example (3-stage heat pump) Internal heat exchanger (IHE) Header Evaporator Compressor 1 safety high pressure switch Low pressure sensor Oil level sight glass, compressor Low pressure test port Oil pressure safety switch, compressor Compressor 3 safety high pressure switch Oil sump heater 3-way solenoid valve, IHE...

  • Page 55: Overview Of Internal Components

    Repairs Overview of internal components (cont.) Fig. 39 Return temperature sensor, secondary circuit Primary circuit return temperature sensor (heat pump brine outlet) Electronic expansion valve (EEV) Flow temperature sensor, secondary circuit Sight glass, liquid line Primary circuit flow temperature sensor (heat pump brine inlet) Draining the heat pump on the primary/secondary side Drain the heat pump at the on-site drain valve on the...

  • Page 56: Pressure Sensors

    Repairs Checking sensors (cont.) Curve, Pt1000 1600 1500 1400 1300 1200 1100 1000 Temperature in °C Fig. 40 Pressure sensors Pressure sensors for soldering or with threaded fittings are used. Sensor R1234ze refrigerant Low pressure sensor Up to 9 bar (0.9 MPa) High pressure sensor Up to 40 bar (4 MPa) Curves...
  • Page 57 Repairs Unlocking the safety high pressure switch Stage 1 of the safety high pressure switch can be unlocked by the system user when a corresponding fault message appears. "Overview of fault messages" in the service instructions for the "Vitocal 350-HT Pro PLC" Note Stage 2 can only be unlocked by a service engineer.
  • Page 58 Repairs Unlocking the safety high pressure switch (cont.)

  • Page 59: Ordering Parts

    Parts lists Ordering parts The following details are required when ordering parts: ■ Serial no. (see type plate) ■ Position number of the part (from this parts list)
  • Page 60 Parts lists Parts, section 1 0011 0010 0019 0010 0010 0006 0013 0014 0015 0011 0011 0012 0009 0020 0009 0014 0009 0005 0007 0016 0017 0008 0025 0024 0023 0004 0002 0015 0012 0003 0015 0012 0018 0015 0015 0021 0022 0001...
  • Page 61 Parts lists Parts, section 1 (cont.) Pos. Part 0001 Compressor 0002 Plate heat exchanger 0003 Plate heat exchanger 0004 Plate heat exchanger 0005 Sight glass for soldering 0006 Pressure transmitter, high pressure 0007 Pressure transmitter, low pressure 0008 Pressure transmitter, oil pressure, compressor 0009 Safety high pressure switch 0010...

  • Page 62: Parts Section

    Parts lists Parts, section 2 0026 0027 0027 0027 0029 0031 0032 0033 0050, 0051, 0052 0028 0030 0049 0047 0047 0047 0046 0044 0042 0039 0038 0037 0036 0035 0034 0050, 0052 0026 0048 0027 0027 0027 0045 0043 0041 0040 0050...
  • Page 63 Parts lists Parts, section 2 (cont.) Pos. Part 0026 Terminal cover 0027 Terminal cover, NH element 0028 Initiator terminal 0029 CPU extension module 0030 Connector 0031 CPU base module 0032 Transformer 0033 Small contactor 0034 Bolt connection terminals 0035 Transfer module 0036 Logical base 0037...
  • Page 64 Parts lists Parts, section 3 (type...PW) 0053 0061 0054 0055 0056 0055 0057 0055 0064 0056 0055 0056 0055 0056 0055 0058 0060 0059 Fig. 45...
  • Page 65 Parts lists Parts, section 3 (type...PW) (cont.) Pos. Part 0053 Motor overload relay 0054 Circuit breaker 0055 Neutral conductor isolator 0056 Circuit breaker 0057 Circuit breaker 0058 Installation terminal 0059 Earth conductor terminal 0060 Contactors 0061 Earth conductor terminal 0064 RC element...
  • Page 66 Parts lists Parts, section 3 (type...SA) 0063 0054 0055 0056 0055 0057 0055 0056 0055 0056 0055 0056 0055 0058 0062 0059 Fig. 46...
  • Page 67 Parts lists Parts, section 3 (type...SA) (cont.) Pos. Part 0054 Circuit breaker 0055 Neutral conductor isolator 0057 Circuit breaker 0058 Installation terminal 0059 Earth conductor terminal 0062 Soft start 0063 Earth conductor terminal...
  • Page 68 Specification Specification, Vitocal 350-HT Pro Operation: Brine/water, 2-stage (B0/W35) Type BW 352.AHT058 352.AHT071 352.AHT084 352.AHT096 352.AHT119 Performance data to EN 14511 (B0/W35, 5 K spread) Rated heating output 56.6 72.4 83.2 96.6 116.8 Cooling capacity 43.4 55.4 63.6 73.4 88.4 Power consumption 13.2 17.0...

  • Page 69: Specification

    Specification Specification, Vitocal 350-HT Pro (cont.) Type BW 353.AHT126 353.AHT147 Heating water (secondary circuit) Heat exchanger capacity Nominal flow rate dT 5 K 21.6 25.1 Pressure drop Max. flow temperature at primary inlet = 0 °C °C Min. flow temperature secondary circuit °C Minimum flow rate 15.5...
  • Page 70 Note Note Other output data than that described above may Parameters need to be adjusted in connection with require recalculation, such as flow rates among other external demand. Viessmann must be consulted. things. Operation: Brine/water, 2-stage (B10/W35) Type BW 352.AHT058 352.AHT071...
  • Page 71 Specification Specification, Vitocal 350-HT Pro (cont.) Type BW 352.AHT058 352.AHT071 352.AHT084 352.AHT096 352.AHT119 Heating water (secondary circuit) Heat exchanger capacity Nominal flow rate (spread 14.6 18.6 21.3 21.3 29.8 5 K) Pressure drop Max. flow temperature at °C primary inlet = 10 °C Min.
  • Page 72 Specification Specification, Vitocal 350-HT Pro (cont.) 2-stage (B0/W35) Type BW 352.AHT058 352.AHT071 352.AHT084 352.AHT096 352.AHT119 Electrical values, heat pump Rated voltage, compres- 3/PE 400 V/50 Hz Compressor starting cur- 125 each 165 each 165 each 219 each 226 each rent (part winding) Compressor starting cur- 132 each 160 each...
  • Page 73 Oil quantity 16.3 16.3 Scop LT 3.92 3.86 etas LT Scop HT 3.14 3.11 etas HT Information on refrigerant The EC safety datasheet for R1234ze can be obtained from the Technical Services department of Viessmann Werke. See type plate...
  • Page 74 Geothermal probes/well and connection lines fully installed, filled and vented Frost protection taken into consideration Components for cooling mode fully installed, filled and vented Preferred appointment: Date Time Date Time The work requested from Viessmann will be billed to me/us in accordance with the latest Viessmann pricelist. Place/date Signature...

  • Page 75: Final Decommissioning

    Final decommissioning Dismantling/disposal Once the appliance reaches the end of its service life, or when replacing components, observe the statutory regulations on dismantling, recovery and disposal. Refrigerants may only be recovered and replaced by professionals who are qualified and certified for this. Used refrigerant must be recycled by correct and veri- fied means.
  • Page 76 BW 352.AHT119SA, BW 353.AHT126PW, BW 353.AHT126SA, BW 353.AHT147PW and BW 353.AHT147SA, including PLC control unit We, Viessmann (Switzerland) AG, CH-3076 Worb SBB, declare as sole responsible body that the named product complies with the provisions of the following directives and regulations:...
  • Page 77 Keyword index Keyword index Active cooling Geothermal probe – Hydraulic connection..........24 – Hydraulic connection..........21 Adjusting operating display........51 Groundwater Ambient temperatures..........13 – Hydraulic connection..........22 Appliance fuses............56 Appliance too noisy............ 52 Heating water buffer cylinder – Hydraulic connection..........23 Base................15 Heat pump, closing..........45, 51 Heat pump, draining...........55 Heat pump, opening...........48 Casing ventilation............32...
  • Page 78 Keyword index Keyword index (cont.) Permissible operating pressure........49 Safety high pressure switch........57 Power cable routing........... 34 Seal ring replacement.......... 48, 49 Power-OFF..............43 Secondary circuit, filling..........49 Power supply............11, 42 Secondary circuit, filling and venting......49 Pressure, checking.............49 Secondary circuit connection........31 Pressure points of the feet.........
  • Page 80 7570452 7570453 7570473 7570474 7570475 7570476 7570477 7570478 7570479 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:

Bw 35 .aht sa seriesVitocal 350-ht proBw 352.aht058pwBw 353.aht147pwBw 352.aht058saBw 353.aht147sa

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