Viessmann VITOCAL 242-S Installation And Service Instructions Manual
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Viessmann VITOCAL 242-S Installation And Service Instructions Manual

Compact heat pumps, split version for heating and cooling operation
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VIESMANN
Installation and service
instructions
for contractors
Vitocal 242-S
Type AWT-AC 241.A04 to A13, B10, B13
Compact heat pumps, split version for heating and cooling opera-
tion
For applicability, see the last page
VITOCAL 242-S
Please keep safe.
5546 699 GB
7/2014

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  • Page 1 VIESMANN Installation and service instructions for contractors Vitocal 242-S Type AWT-AC 241.A04 to A13, B10, B13 Compact heat pumps, split version for heating and cooling opera- tion For applicability, see the last page VITOCAL 242-S Please keep safe. 5546 699 GB...
  • Page 2 Safety instructions Safety instructions Please follow these safety instructions closely to prevent accidents and mate- rial losses. Safety instructions explained ■ Codes of practice of the 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 Repairing components that fulfil a safety function can compromise the safe operation of your sys- tem. Defective components must be replaced with genuine Viessmann spare parts. Auxiliary components, spare and wearing parts Please note Spare and wearing parts that have not been tested together with the system can compromise its function.

  • Page 4: Table Of Contents

    Index Index Installation instructions Preparing for installation Intended use......................Requirements regarding on-site connections............Installation sequence Installing the external unit..................10 Installing the internal unit..................15 Connecting refrigerant lines................. 24 Connecting the secondary circuit................. 34 Connecting the DHW side..................37 Connecting the solar circuit.................. 38 Connecting a cooling circuit if required..............
  • Page 5 Index Index (cont.) Parts lists, external unit 230 V~, type AWT-AC 241.A10, A13 Ordering parts...................... 119 Overview of assemblies 230 V~................120 Casing, external unit 230 V~................121 Electrical equipment, external unit 230 V~............123 Hydraulics, external unit 230 V~................125 Parts lists, external unit 400 V~, type AWT-AC 241.B10, B13 Ordering parts......................

  • Page 6: Preparing For Installation

    Preparing for installation Intended use The appliance is only intended to be Commercial or industrial usage for a pur- installed and operated in sealed unven- pose other than central heating/cooling ted heating systems that comply with or DHW heating shall be deemed inap- EN 12828, with due attention paid to the propriate.

  • Page 7: Requirements Regarding On-Site Connections

    Preparing for installation Requirements regarding on-site connections Internal unit A Opening for LV leads < 42 V B DHW...
  • Page 8 Preparing for installation Requirements regarding on-site connections (cont.) C DHW circulation H Heating water flow D Opening for 230 V cables K Heating water return E Cold water L Solar circuit return F Liquid line M Solar circuit flow G Hot gas line Connection sizes for hydraulic connections Pos.
  • Page 9 Preparing for installation Requirements regarding on-site connections (cont.) Cable lengths in the internal/external unit plus wall clearance Cables Internal unit External unit Power cables: ■ Heat pump control unit (230 V~) 2.0 m – ■ Compressor (230 V~/400 V~) – 1.5 m Other connecting cables: ■...

  • Page 10: Installation Sequence

    Installation sequence Installing the external unit Installation information Types of installation: Weather influences: ■ Floorstanding installation with line ■ Observe wind loads when installing entry above ground level the unit on sites exposed to the wind. ■ Floorstanding installation with line ■...
  • Page 11 Installation sequence Installing the external unit (cont.) Weight of external units Type AWT-AC Weight in kg 241.A04 241.A07 241.A10 241.A13 241.B10 241.B13 Installation site ■ Select a site with good air circulation, ■ Never install in interior corners, in so that the cooled air can dissipate and recesses or between walls.
  • Page 12 Installation sequence Installing the external unit (cont.) ■ Never install closer than 3 m to path- ways, downpipes or sealed surfaces. The cooled air in the discharge area creates a risk of ice forming when out- side temperatures are below 10 °C. ■...
  • Page 13 Installation sequence Installing the external unit (cont.) Type AWT-AC Dimensions in mm Cable entry above below ground ground level level 241.B10 ≥ 100 ≥ 200 ≥ 400 ≥ 300 ≥ 1000 241.B13 ≥ 100 ≥ 200 ≥ 400 ≥ 300 ≥...
  • Page 14 Installation sequence Installing the external unit (cont.) Floor mounting A Support for floorstanding installation (accessories)

  • Page 15: Installing The Internal Unit

    Installation sequence Installing the external unit (cont.) B Gravel bed as condensate soak- D Drainage pipe DN 100 (only with away entries below ground level) C Concrete foundations (see technical E Rubber mounts (supplied) guide) Note We recommend letting condensate drain away freely (without condensate pipe).
  • Page 16 Installation sequence Installing the internal unit (cont.) Total weight with filled DHW cylinder Minimum room volume (to EN 378) Type AWT-AC Weight in kg Type AWT-AC Minimum room 241.A04 volume in m 241.A07 241.A04 241.A10 241.A07 241.A13 241.A10 241.B10 241.A13 241.B13 241.B10 241.B13...
  • Page 17 Installation sequence Installing the internal unit (cont.) Removing the cylinder module...
  • Page 18 Installation sequence Installing the internal unit (cont.) 193B 193C P501 P303 P302 P301...
  • Page 19 Installation sequence Installing the internal unit (cont.)
  • Page 20 Installation sequence Installing the internal unit (cont.)
  • Page 21 Installation sequence Installing the internal unit (cont.)
  • Page 22 Installation sequence Installing the internal unit (cont.) Note Do not damage sealing tape A when removing the cylinder module.
  • Page 23 Installation sequence Installing the internal unit (cont.) Assembly and sealing faces to bear in mind 2. Mount the cylinder module in reverse order to the "cylinder module removal" described on page 17. Please note Make tight hydraulic connec- tions between the heat pump module and cylinder module.

  • Page 24: Connecting Refrigerant Lines

    Installation sequence Installing the internal unit (cont.) Connecting refrigerant lines ■ The external unit is pre-charged with refrigerant R410A. ■ In the following cases, fit oil lift bends in the rising pipe: – In heating mode, if the internal unit is installed higher than the external unit: See diagram below.
  • Page 25 Installation sequence Connecting refrigerant lines (cont.) Routing refrigerant lines Type AWT-AC 241.A04 241.A07 241.A10 241.A13 241.B10 241.B13 Refrigerant lines Min. line length Max. cable length 20 m 30 m 30 m 30 m Max. height differential internal 10 m 15 m 15 m 15 m unit –...
  • Page 26 Installation sequence Connecting refrigerant lines (cont.) Internal unit below external unit or at same level Heating mode A Internal unit C Liquid line B Hot gas line D External unit...
  • Page 27 Installation sequence Connecting refrigerant lines (cont.) Sound and vibration isolation when line entry is above ground level Note Route connecting cables and refrigerant lines separately. Note Only for 230 Vappliances A Pipe bends for compensating vibra- D Cables/leads between internal – tions external units B Tube clips with EPDM inserts...
  • Page 28 Installation sequence Connecting refrigerant lines (cont.) Connection to the external unit Example type AWT-AC 241.A04 C Liquid line D Hot gas line 1. Type AWT-AC 241.A04 and A07: Please note Undo the side cover: See Ensure that no contamination page 52. (e.g.
  • Page 29 Installation sequence Connecting refrigerant lines (cont.) Type AWT-AC 241.A07 to A13, 3. Flare the pipe ends. B10, B13: Replace nuts with union nuts sup- 4. Secure the pipes. plied (internal unit): ■ ⅝ UNF for liquid line ■ ⅞ UNF for hot gas line Tighten nuts with the following torque: Type AWT-AC Cable...
  • Page 30 Installation sequence Connecting refrigerant lines (cont.) C Liquid line D Hot gas line Please note Note Ensure that no contamination ■ The refrigerant lines of the internal unit (e.g. metal swarf) or moisture are filled with nitrogen; overpressure enters the copper pipes. 2 bar (0.2 MPa).
  • Page 31 Installation sequence Connecting refrigerant lines (cont.) 1. Remove nuts from refrigerant con- nections C and D and slide onto the supplied pipe bends. 2. Flare the pipe ends of the supplied pipe bends on the short side. Note Flare the pipe end of the hot gas line by approx.
  • Page 32 Installation sequence Connecting refrigerant lines (cont.) 5. Flare the pipe bends on their open end and secure connection piece (twin connector) with union nuts. Note ■ Flare the pipe end of the hot gas line by approx. 0.5 mm. ■ Connection pieces must not be positioned diagonally.
  • Page 33 Installation sequence Connecting refrigerant lines (cont.) 6. Type AWT-AC 241.A04: ■ Slide the supplied union nuts (⁷⁄₁₆ UNF for liquid line, ¾ UNF for hot gas line) over the refrigerant lines from the external unit. ■ Flare the refrigerant lines from the external unit.

  • Page 34: Connecting The Secondary Circuit

    Installation sequence Connecting refrigerant lines (cont.) Type AWT-AC Cable Connection Torque in Nm to internal unit 241.A13 Liquid line 7 10 mm ⅝ UNF 33 to 42 Hot gas line 7 16 mm ⅞ UNF 63 to 77 241.B10 Liquid line 7 10 mm ⅝...
  • Page 35 Installation sequence Connecting the secondary circuit (cont.) A Straight pipe sections supplied B Pipe bends from secondary circuit connection set (accessories): See separate installation instructions. Symbol Meaning Connection Heating water return Cu 28 x 1 mm Heating water flow Cu 28 x 1 mm...
  • Page 36 Installation sequence Connecting the secondary circuit (cont.) 2. Fit the safety assembly supplied: Either to an on-site line in the heating water return or to the secondary cir- cuit connection set (accessory). Connection set installation instructions 3. Fill and vent the secondary circuit. 4.

  • Page 37: Connecting The Dhw Side

    Installation sequence Connecting the DHW side For the DHW connection, observe DIN 1988 and DIN 4753 (c: SVGW regulations). P R H M O A DHW H Shut-off valve B DHW circulation pump K Flow regulating valve C Spring-loaded check valve L Pressure gauge connection D Heat pump connecting chamber M Non-return valve/pipe separator...

  • Page 38: Connecting The Solar Circuit

    Installation sequence Connecting the DHW side (cont.) Recommendation: Install the safety valve higher than the top edge of the cyl- inder. This protects the valve against contamination, scaling and high temper- atures. It also means that the DHW cyl- inder does not need to be drained when working on the safety valve.
  • Page 39 Installation sequence Electrical connection (cont.) ■ Route LV leads < 42 V and This prevents wires from drifting into the > 42 V/230 V~/400 V~ cables sepa- adjacent voltage area in the event of fault rately. (e.g. when a wire comes loose). ■...
  • Page 40 Installation sequence Electrical connection (cont.) Internal unit: Routing cables to the wiring chamber 400/230 V > 42 V < 42 V...
  • Page 41 Installation sequence Electrical connection (cont.) A Power cables to switching module E Type AWT-AC 241.A04 and A07: for instantaneous heating water 43 V BUS cable: Routing in the heater 230 V~/400 V~ 230 V~ voltage range (connection, B Connecting cables for 230 V~ func- see page 53) tion components F Heat pump control unit power cable...
  • Page 42 Installation sequence Electrical connection (cont.) Internal unit: Overview of connections F21 F13 F23 F14 12 V P202 P203 43 V F101...
  • Page 43 Installation sequence Electrical connection (cont.) A Expansion PCB on main PCB: Make no on-site connections B Main PCB: See page 43. F3 Fuse 6.3 A (slow) C Controller and sensor PCB: See page 48. D AVI PCB: See page 51. F101 Fuse 1.0 A (slow) E Luster terminals: See page 46.
  • Page 44 Installation sequence Electrical connection (cont.) Plug sYA Terminals Function Explanation 211.2 Secondary pump ■ In systems without a heating water buffer cylinder, no other heating circuit pump is required (see terminal 212.2). ■ Connect the temperature limiter to restrict the maximum temperature for underfloor heating systems (if installed) in series.
  • Page 45 Installation sequence Electrical connection (cont.) Plug sYS Terminals Function Explanation 212.3 DHW circulation pump Connection values ■ Output: 50 W ■ Voltage: 230 V~ ■ Max. switching current: 4(2) A 212.4 Solar circuit pump with high Connection values limit safety cut-out (up to ■...
  • Page 46 Installation sequence Electrical connection (cont.) Heating circuit without mixer A1/ Connection Circulation pump C A to control unit ■ Without heating water buffer cylin- 211.2 Secondary pump ■ With heating water buffer cylinder 212.2 Heating circuit pump A1/ Connecting the temperature limiter, part no.
  • Page 47 Installation sequence Electrical connection (cont.) Terminals Function Explanation X3.1 Switched phase Via control unit ON/OFF switch Note Observe the total load 1000 W of all con- nected components. X3.3 Flow switch Requires zero volt N/O contact: X3.4 ■ Closed: Heat pump in operation ■...
  • Page 48 Installation sequence Electrical connection (cont.) Terminals Function Explanation X3.8 Frost stat and/or contact Requires zero volt N/C contact: X3.9 humidistat, cooling ■ Closed: Continuous safety chain ■ Open: Safety chain interrupted; heat Jumper pump shut down ■ Breaking capacity 230 V~, 0.15 A Connection: ■...
  • Page 49 — Connection for Viessmann appliances, e.g. Vitovent 300-F Note If further Viessmann appliances are to be con- nected to Modbus 1, plug in the Modbus distrib- utor (accessory) (see "Modbus distributor" instal- lation instructions). Connection for LON communication module (see —...
  • Page 50 Installation sequence Electrical connection (cont.) Swimming pool heating Note ■ Swimming pool heating is controlled via extension EA1 with KM BUS. ■ Make connections to extension EA1 only according to the following dia- gram. ■ A filter circuit pump cannot be control- led via the heat pump control unit.
  • Page 51 Installation sequence Electrical connection (cont.) D Fuses and contactor for circulation G Circulation pump for swimming pool pump for swimming pool heating heating (accessory) H Thermostat for swimming pool tem- (accessories) E Jumper perature control (floating contact: 230 V~, 0.1 A, accessories) F 3-way diverter valve for "Swimming K Connection on controller and sensor pool"...
  • Page 52 Installation sequence Electrical connection (cont.) External unit: Overview of connections Opening the external unit wiring chamber Type AWT-AC 241.A04 241.A07 241.A10/A13, 241.B10/B13 A Wiring chamber: ■ BUS connection to the internal unit Note Do not interchange the BUS con- nection wires between the internal and external units.
  • Page 53 Installation sequence Electrical connection (cont.) Connecting internal and external units 230 V~ Type AWT-AC 241.A04 241.A07 241.A10 and A13 C N L ? C2 C1 ? N L 12VCOM COM43V 12VCOM COM43V 12V COM COM 43V 400 V~ A Wiring chamber, external unit: See Type AWT-AC 241.B10 and B13 page 52.

  • Page 54: Power Supply

    Installation sequence Power supply Isolators for non-earthed conductors Danger ■ The mains isolator (if installed) must Incorrect core allocation can simultaneously isolate from the mains result in serious injury and dam- all non-earthed conductors with a min- age to the appliance. imum contact separation of 3 mm.
  • Page 55 Installation sequence Power supply (cont.) ■ In conjunction with on-site power con- sumption (use of power generated by the PV system to meet own require- ments): During the power-OFF period, it is not possible to operate the compres- sor with power generated on site. ■...
  • Page 56 Installation sequence Power supply (cont.) External unit power supply 230 V~/400 V~ ■ Economy tariff and power-OFF can be Note used. Free terminals for internal use. ■ No parameters need to be set when using economy tariff with power-OFF. The compressor is shut down during the power-OFF period.
  • Page 57 Installation sequence Power supply (cont.) External unit power supply 400 V~ A Wiring chamber, external unit: See page 52. B Power supply 230 V/50 Hz Please note Incorrect phase sequence can cause damage to the appliance. Make the compressor power sup- ply only in the phase sequence specified (see terminals) with a clockwise rotating field.
  • Page 58 Installation sequence Power supply (cont.) Connecting instantaneous heating water heater power cable Internal unit ■ Recommended power cable: 400 V~: 5 x 2.5 mm 1/N/PE 230 V~: 7 x 2.5 mm 230 V/50 Hz ■ Fuse rating max. 16 A ■...
  • Page 59 Installation sequence Power supply (cont.) Power supply with power-OFF Power-OFF without on-site load disconnection The power-OFF signal is connected Note directly to the heat pump control unit. Observe the technical connection condi- The compressor will be "forced" OFF tions of the relevant power supply util- when the power-OFF is active.
  • Page 60 Installation sequence Power supply (cont.) Power-OFF with on-site load disconnection The power-OFF signal is connected to Note the on-site contactor of the economy tar- Observe the technical connection condi- iff power supply and to the heat pump tions of the relevant power supply util- control unit.
  • Page 61 Installation sequence Power supply (cont.) H Economy tariff meter L Mains isolator K Feed: TNC system Mains power supply in conjunction with on-site power consump- tion Without power-OFF E1E2 D /D L1 L1 L2 L2 L3 L3 A Heat pump C Electricity meter B Additional consumers (of power D Inverter...

  • Page 62: Closing The Heat Pump

    Installation sequence Power supply (cont.) G Double-tariff meter (for special tariff K Meter with reverse block: for heat pump) For energy generated by PV sys- Not permissible in conjunction with L Isolator for the domestic power sup- PV systems for on-site power con- sumption ply connection (distribution panel) H Bi-directional meter (for PV systems...

  • Page 63: Commissioning, Inspection, 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..........65 • 2. Compiling reports............65 •...

  • Page 64: Commissioning Steps

    Commissioning, inspection, maintenance Steps - commissioning, inspection and… (cont.) Commissioning steps Inspection steps Maintenance steps Page • 20. Commissioning the system........... 77 • 21. Ticking the heat pump type on the type plate of the internal unit (as per external unit type plate) •...

  • Page 65: Further Details Regarding The Individual Steps

    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 serious injury from installation and commissioning of electric current. the appliance to prevent equip- ■...

  • Page 66: Evacuating The Refrigerant Lines And Internal Unit

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Evacuating the refrigerant lines and internal unit Please note Please note Commissioning is weather- Before evacuating the refrigerant dependent. lines and the internal unit, check all connections for tightness with In the case of high relative humid- leak detection spray.
  • Page 67 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Example type AWT-AC 241.A07 A Internal unit E Fill valve B Hot gas line F Shut-off valve C External unit G Liquid line D Service valve (Schrader valve) H Fill hose between pressure gauge In type AWT-AC 241.A07 the serv- set and external unit K Pressure gauge set...
  • Page 68 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) L Connection hose between pressure P Valve for vacuum gauge gauge set and vacuum pump Q Vacuum gauge M Vacuum pump N Connection hose between pressure gauge set and vacuum gauge Please note 4.

  • Page 69: Charging The Refrigerant Lines And Internal Unit

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Charging the refrigerant lines and internal unit Note 2. Undo the caps from the fill valves of ■ The external unit is pre-charged with the external unit. Open both fill valves refrigerant R410A.

  • Page 70: Checking The Refrigerant Circuit For Tightness

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) 4. Undo the caps from the fill valves of Refrigerant charge per metre line the external unit. Open both fill valves length (for line lengths from 12 to and refit the caps. 30 m) Type AWT-AC R410A in g/m...

  • Page 71: Filling And Venting The Secondary Side

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Check the connections for refrigerant Note leaks: Work on the refrigerant circuit may only ■ All swaged connections of the refrig- by carried out by certified personnel erant lines between the internal and (according to EC Directives 842/2006 the external unit and 303/2008).
  • Page 72 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) 3. Fill (flush) and vent the secondary cir- cuit: ■ Slightly open the quick-action air vent valve (see safety assembly, chapter "Connecting the secon- dary circuit"); it remains open. ■ For venting, use lever to move the 3-way diverter valve for "Heating/ DHW heating"...

  • Page 73: Filling And Venting The Solar Circuit

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Filling and venting the solar circuit Danger Please note Overheated collector areas and Avoid appliance damage. overheated heat transfer medium only fill the solar circuit with can cause burns/scalding and Tyfocor LS.
  • Page 74 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 75: 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 76: Checking Electrical Connections Of The External Unit

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Please note 3. Check the aluminium fins of the heat Excessive air pressure from exchanger for deformation and the front and sides can result scratches; if necessary, repair with a in the deformation of the alu- suitable tool (e.g.

  • Page 77: Starting The Heat Pump

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Starting the heat pump Please note Follow the sequence shown Operating the appliance with insufficient refrigerant results in 1. Switch ON external unit voltage. appliance damage. ■ Before switching on the appli- 2.
  • Page 78 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Please note ■ When the unit is first commissioned, Incorrect operation at "Coding the display is in German. level 1" may result in damage to the appliance and the heating Sprache system.
  • Page 79 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Language Date Time Date/time Start commissioning? Parameter group Parameter Coding 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 Function check...
  • Page 80 7. Set system scheme: "6" to each parameter. Required heat pump parameters "Output compressor stage 5030" During commissioning, the heating out- put of the heat pump must be set subject to type. Vitocal 242-S, type AWT-AC 241.A04 241.A07 241.A10 241.A13 241.B10 241.B13 "Output compressor stage...
  • Page 81 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Required parameters for components connected on site Detailed explanations on parameters "Vitotronic 200" heat pump con- trol unit service instructions System scheme Overview of all available system schemes Component System scheme Heating circuit A1/HC1 —...
  • Page 82 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Pumps and other components Pump/component Parameter Setting Heating circuit pump "System definition" Ó ■ With heating circuit A1/ HC1 (for heating circuit "System scheme 7000" without mixer) ■ With heating circuit M2/ HC2 (for heating circuit with mixer) DHW circulation pump...
  • Page 83 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Pump/component Parameter Setting Vitocom 100, type GSM "System definition" Ó "1" "Vitocom 100 7017" External extension "System definition" Ó "1" EA1 "2" AM1 "External extension 7010" "3" EA1 and AM1 Note For parameters for external functions, see the following...
  • Page 84 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) External functions Parameter Setting External blocking of compres- "System definition" Ó "0" to "31" sor and pumps "Effect of external block- ing on pumps/compressor 701A" External blocking of the com- "System definition"...
  • Page 85 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Instantaneous heating water heater Parameters for Setting Instantaneous heating water heater "Electr booster heater" Ó "1" "Enable instantaneous heating water heater 7900" "Electr booster heater", if applicable Ó "1" "Enable instant. heating water heater for cen- tral heating 7902"...
  • Page 86 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Ventilation unit parameters Setting ■ "Flow rate nominal ventilation 7D0B" "7D0A" minus 10 m /h up to "7D0C" minus 10 m ■ "Flow rate intensive ventilation 7D0C" "7D0B" plus 10 m /h up to "280"...
  • Page 87 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Checking the system function (e.g. actuators, temperatures, heat meter if applicable) Please note If the heat pump is exposed to temperatures below –15 °C, e.g. during storage or transport, the high limit safety cut-out of the instantaneous heating water heater may respond.

  • Page 88: Troubleshooting

    Troubleshooting Repairs Overview of electrical components See from page 42. Opening programming unit...
  • Page 89 Troubleshooting Repairs (cont.) Removing cover from programming unit, if necessary...
  • Page 90 Troubleshooting Repairs (cont.) Overview of internal components: Internal unit a:C] a:C]...
  • Page 91 Troubleshooting Repairs (cont.) Secondary circuit flow tempera- Secondary circuit drain & fill ture sensor (alternative posi- valve tions) Service valve, internal unit: Solar circuit return temperature Schrader valve, can be used in sensor place of the external unit service Secondary circuit return tem- valve for pressure checks and perature sensor evacuating the refrigerant cir-...
  • Page 92 Troubleshooting Repairs (cont.) DHW cylinder drain & fill valve positions A Closed C Open to drain or fill the cylinder B Open to drain the internal DHW line Overview of internal components: External unit Danger Contact with 'live' components can result in severe injuries. Capacitors remain 'live' after the power supply has been switched OFF.
  • Page 93 Troubleshooting Repairs (cont.) External unit 4 kW, type AWT-AC 241.A04 A Fan G Compressor head temperature sen- B Heat exchanger (evaporator) sor (CTT) C Temperature sensor, air intake, H Electronic expansion valve (EEV) evaporator (OAT) K Temperature sensor, refrigerant D Evaporator temperature sensor inlet, evaporator (OCT) (OMT) L Liquid separator...
  • Page 94 Troubleshooting Repairs (cont.) External unit 7 kW, type AWT-AC 241.A07 A Fan G Compressor head temperature sen- B Heat exchanger (evaporator) sor (CTT) C Temperature sensor, air intake, H High pressure switch (pHi) evaporator (OAT) K Liquid separator D Evaporator temperature sensor L Temperature sensor, refrigerant (OMT) inlet, evaporator (OCT)
  • Page 95 Troubleshooting Repairs (cont.) External unit 10/13 kW, type AWT-AC 241.A10, 241.A13, 241.B10, 241.B13 A Fan G Compressor head temperature sen- B Heat exchanger (evaporator) sor (CTT) C Temperature sensor, air intake, H Liquid separator evaporator (OAT) K Temperature sensor, refrigerant D Evaporator temperature sensor inlet, evaporator (OCT) (OMT)
  • Page 96 Troubleshooting Repairs (cont.) Draining secondary side heat pump 1. Close the on-site boiler drain & fill 2. Drain the heat pump at the secondary valve. circuit fill & drain valve (see chapter "Overview of internal components: Internal unit"). Checking the sensors Sensor Test el- Installed loca-...
  • Page 97 50 kΩ (see page 92) controller (ob- serve label on the external unit) Temperature sensors in the internal unit (with ID) Viessmann NTC 10 kΩ (marked blue) Outside temperature sensor Other sensors -20 -10 10 20 30 Temperature in °C 10 30 50 70 90 110 Temperature in °C...
  • Page 98 Troubleshooting Repairs (cont.) Viessmann NTC 20 kΩ (marked orange) Temperature in °C Viessmann Pt500A (marked green) 140 180 Temperature in °C...
  • Page 99 Troubleshooting Repairs (cont.) Temperature sensors in the external unit (without ID) Type NTC 10 kΩ 1000 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 Temperature in °C Type NTC 50 kΩ 1000 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 Temperature in °C Checking fuses Position of the fuses: See from...
  • Page 100 Troubleshooting Repairs (cont.) Danger Removing the fuse does not switch the power circuit to zero volt. Contact with 'live' compo- nents can lead to serious injury from electric current. Before working on the equip- ment, always ensure that the power circuit is also at zero volt.

  • Page 101: Parts Lists, Internal Unit

    Parts lists, internal unit Ordering parts The following information is required: ■ Serial no. (see type plate A) ■ Assembly (from the parts list) ■ Position number of the individual part within the assembly (from this parts list)

  • Page 102: Overview Of Assemblies, Internal Unit

    Parts lists, internal unit Overview of assemblies, internal unit A Type plate C Electrical equipment assembly, B Casing assembly, internal unit internal unit...

  • Page 103: Parts Not Shown, Internal Unit

    F Cylinder assembly, internal unit Parts not shown, internal unit Pos. Component 0004 Touch-up spray paint, white 0005 Touch-up paint stick, white 0007 Vitocal 242-S installation and service instructions Casing, internal unit Pos. Component 0001 Front panel, top 0002 Front panel, bottom 0003...
  • Page 104 Parts lists, internal unit Casing, internal unit (cont.) 0003 0006 0005 0001 0007 0004 0008 0009 0002 0010...

  • Page 105: Electrical Equipment, Internal Unit

    Parts lists, internal unit Electrical equipment, internal unit Pos. Component 0001 Programming unit 0002 Controller and sensor PCB with cover (CU401) 0005 Main PCB with cover (MB761) 0006 Expansion PCB with cover (SA135) 0007 Coding card 0008 AVI PCB (IU122-A10) 0009 Base support, controller and sensor PCB 0010...
  • Page 106 Parts lists, internal unit Electrical equipment, internal unit (cont.) Pos. Component 0029 Cable harness, low voltage, for AVI PCB 0031 Fuses 6.3 A (slow) (set) 0036 Cylinder temperature sensor NTC 10 kΩ 0038 Return temperature sensor, solar circuit NTC 10 kΩ...
  • Page 107 Parts lists, internal unit Electrical equipment, internal unit (cont.) 0018 0020 0033 0017 0019 0001 0032 0007 0006 0005 0010 0002 0009 0037 0011 0008 0030 0013 0023 0025 0024 0034 0035 0039 0040...

  • Page 108: Hydraulics, Internal Unit

    Parts lists, internal unit Hydraulics, internal unit Pos. Component 0001 Back panel, lower casing 0002 Bottom panel 0003 Top panel, lower casing 0004 Angle profile, lower casing, left 0005 Angle profile, lower casing, right 0006 Retaining rail 0007 Retainer, evaporator/condenser 0008 Insulation, bottom panel 0009...
  • Page 109 Parts lists, internal unit Hydraulics, internal unit (cont.) Pos. Component 0041 Gaskets A 23 x 30 x 2.0 mm (set) 0042 Screws (set) 0043 Gasket A 21 x 30 x 2.0 mm 0044 Spring clips (set) 0045 Solder connections (set) 0046 Reducers (set) 0047...
  • Page 110 Parts lists, internal unit Hydraulics, internal unit (cont.) 0038 0003 0034 0035 0027 0042 0028 0014 0026 0041 0026 0027 0039 0041 0028 0038 0015 0044 0030 0030 0029 0033 0030 0044 0039 0034 0027 0041 0009 0035 0044 0028 0039 0048 0029...

  • Page 111: Cylinder, Internal Unit

    Parts lists, internal unit Cylinder, internal unit Pos. Component 0001 Loading cylinder 220 l 0002 Back panel, casing top 0003 Retaining bracket, loading cylinder 0004 Connection line, cylinder loading pump – check valve 0005 Return line, solar 0006 Flow line, solar 0007 Connector, DHW line 0008...
  • Page 112 Parts lists, internal unit Cylinder, internal unit (cont.) 0007 0017 0035 0034 0035 0011 0008 0032 0015 0017 0035 0013 0035 0035 0014 0012 0028 0003 0001 0030 0014 0026 0029 0002 0013 0021 0016 0033 0035 0018 0035 0035 0009 0035 0027...

  • Page 113: Parts Lists, External Unit 230 V~, Type Awt-Ac 241.A04

    Parts lists, external unit 230 V~, type AWT-AC 241.A04 Ordering parts The following information is required: ■ Serial no. (see type plate) ■ Assembly (from the parts list) ■ Position number of the individual part within the assembly (from this parts list) External unit 230 V~ Type AWT-AC 241.A04...

  • Page 114: External Unit 230 V

    Parts lists, external unit 230 V~, type AWT-AC 241.A04 External unit 230 V~ (cont.) Pos. Component 0028 Terminal strip, 4-pole 0029 Electronic expansion valve 0030 Temperature sensor NTC 10 kΩ (OCT) 0031 Temperature sensor NTC 10 kΩ (OAT/OMT) 0032 Temperature sensor NTC 10 kΩ (CTT) Parts not shown Pos.

  • Page 115: External Unit 230 V

    Parts lists, external unit 230 V~, type AWT-AC 241.A04 External unit 230 V~ (cont.) 0024 0022 0026 0010 0021 0020 0031 0028 0023 0027 0009 0014 0006 0005 0004 0030 0025 0002 0008 0019 0015 0017 0016 0001 0003 0032 0018 0013 0029...

  • Page 116: Ordering Parts

    Parts lists, external unit 230 V~, type AWT-AC 241.A07 Ordering parts The following information is required: ■ Serial no. (see type plate) ■ Assembly (from the parts list) ■ Position number of the individual part within the assembly (from this parts list) External unit 230 V~ Type AWT-AC 241.A07...
  • Page 117 Parts lists, external unit 230 V~, type AWT-AC 241.A07 External unit 230 V~ (cont.) Pos. Component 0030 Partition 0031 Control unit 0032 Motor support 0033 Top panel 0034 Transport handle 0035 Cover 0036 Temperature sensor NTC 10 kΩ (OAT/OMT) 0037 Temperature sensor NTC 10 kΩ...
  • Page 118 Parts lists, external unit 230 V~, type AWT-AC 241.A07 External unit 230 V~ (cont.) 0033 0032 0031 0036 0027 0036 0028 0030 0026 0035 0029 0004 0007 0034 0038 0003 0012 0020 0022 0021 0043 0005 0006 0042 0037 0023 0013 0014 0011...
  • Page 119 Parts lists, external unit 230 V~, type AWT-AC 241.A10, A13 Ordering parts The following information is required: ■ Serial no. (see type plate A) ■ Assembly (from the parts list) ■ Position number of the individual part within the assembly (from this parts list)
  • Page 120 Parts lists, external unit 230 V~, type AWT-AC 241.A10, A13 Overview of assemblies 230 V~ Type AWT-AC 241.A10, A13...

  • Page 121: Overview Of Assemblies 230 V

    Parts lists, external unit 230 V~, type AWT-AC 241.A10, A13 Overview of assemblies 230 V~ (cont.) A Type plate B Casing assembly, external unit C Electrical equipment assembly, external unit D Hydraulic assembly, external unit Casing, external unit 230 V~ Type AWT-AC 241.A10, A13 Pos.

  • Page 122: Casing, External Unit 230 V

    Parts lists, external unit 230 V~, type AWT-AC 241.A10, A13 Casing, external unit 230 V~ (cont.) 0001 0021 0022 0023 0014 0017 0018 0019 0020 0013 0011 0009 0010 0012 0015 0008 0005 0011 0007 0010 0002 0003 0015 0007 0004 0006 0016...
  • Page 123 Parts lists, external unit 230 V~, type AWT-AC 241.A10, A13 Electrical equipment, external unit 230 V~ Type AWT-AC 241.A10, A13 Pos. Component 0001 Main PCB 0002 Driver PCB 0003 Capacitor PCB 0004 PCB, mains filter 0005 Choke coil 0006 Coil, electronic expansion valve 0007 Coil, 4-way diverter valve 0008...

  • Page 124: Electrical Equipment, External Unit 230 V

    Parts lists, external unit 230 V~, type AWT-AC 241.A10, A13 Electrical equipment, external unit 230 V~ (cont.) 0005 0002 0003 0004 0001 0010 0011 0006 0013 0008 0007 0012 0009...
  • Page 125 Parts lists, external unit 230 V~, type AWT-AC 241.A10, A13 Hydraulics, external unit 230 V~ Type AWT-AC 241.A10, A13 Pos. Component 0001 Compressor 0002 Compressor power supply cover 0003 Liquid separator 0004 High pressure switch 0005 Shut-off valve, hot gas line 0006 Oil separator 0007...

  • Page 126: Hydraulics, External Unit 230 V

    Parts lists, external unit 230 V~, type AWT-AC 241.A10, A13 Hydraulics, external unit 230 V~ (cont.) 0007 0004 0008 0003 0002 0006 0001 0010 0005...

  • Page 127: Parts Lists, External Unit 400 V~, Type Awt-Ac 241.B10, B13

    Parts lists, external unit 400 V~, type AWT-AC 241.B10, B13 Ordering parts The following information is required: ■ Serial no. (see type plate A) ■ Assembly (from the parts list) ■ Position number of the individual part within the assembly (from this parts list)
  • Page 128 Parts lists, external unit 400 V~, type AWT-AC 241.B10, B13 Overview of assemblies 400 V~ Type AWT-AC 241.B10, B13...

  • Page 129: Overview Of Assemblies 400 V

    Parts lists, external unit 400 V~, type AWT-AC 241.B10, B13 Overview of assemblies 400 V~ (cont.) A Type plate B Casing assembly, external unit C Electrical equipment assembly, external unit D Hydraulic assembly, external unit Casing, external unit 400 V~ Type AWT-AC 241.B10, B13 Pos.

  • Page 130: Casing, External Unit 400 V

    Parts lists, external unit 400 V~, type AWT-AC 241.B10, B13 Casing, external unit 400 V~ (cont.) 0001 0022 0021 0012 0017 0023 0014 0018 0009 0019 0013 0011 0010 0015 0005 0008 0007 0011 0002 0003 0020 0010 0015 0004 0007 0016 0006...
  • Page 131 Parts lists, external unit 400 V~, type AWT-AC 241.B10, B13 Electrical equipment, external unit 400 V~ Type AWT-AC 241.B10, B13 Pos. Component 0001 Main PCB 0002 Driver PCB 0003 Capacitor PCB 0004 PCB, mains filter 0005 Choke coil 0006 Coil, electronic expansion valve 0007 Coil, 4-way diverter valve 0008...

  • Page 132: Electrical Equipment, External Unit 400 V

    Parts lists, external unit 400 V~, type AWT-AC 241.B10, B13 Electrical equipment, external unit 400 V~ (cont.) 0005 0002 0004 0003 0010 0001 0011 0017 0006 0008 0007 0009 0012...
  • Page 133 Parts lists, external unit 400 V~, type AWT-AC 241.B10, B13 Hydraulics, external unit 400 V~ Type AWT-AC 241.B10, B13 Pos. Component 0001 Compressor 0002 Module, 4-way diverter valve 0003 Liquid separator 0004 High pressure switch 0005 Shut-off valve, hot gas line 0006 Oil separator 0007...

  • Page 134: Hydraulics, External Unit 400 V

    Parts lists, external unit 400 V~, type AWT-AC 241.B10, B13 Hydraulics, external unit 400 V~ (cont.) 0007 0004 0003 0002 0008 0006 0011 0010 0001 0009 0005 0008...

  • Page 135: Commissioning/Service Reports

    Commissioning/service reports Hydraulic parameter report Setting and test values Setpoint Commis- Mainte- sioning nance/Serv- Testing the external heating circuit pumps Circulation pump type Circulation pump stage Overflow valve setting Commissioning, primary circuit Air intake temperature °C ("Diagnosis" Ó "System over- view") Air discharge temperature °C...
  • Page 136 Commissioning/service reports Control parameters report (cont.) System definition Parameter Code Delivered Commis- Mainte- condition sioning nance/ Service "System scheme" (see chapter 7000 "System scheme") "Temperature differential for 7003 40 (≙ 4 K) calculating the heating limit" "Temperature differential for 7004 40 (≙...
  • Page 137 Commissioning/service reports Control parameters report (cont.) Parameter Code Delivered Commis- Mainte- condition sioning nance/ Service "Set DHW temperature" 6000 500 (≙ 50 °C) "Min. DHW temperature" 6005 100 (≙ 10 °C) "Max. DHW temperature" 6006 600 (≙ 60 °C) "Hysteresis DHW temperature 6007 50 (≙...
  • Page 138 Commissioning/service reports Control parameters report (cont.) Solar Parameter Code Delivered Commis- Mainte- condition sioning nance/ Service "Type solar control unit" 7A00 "Max. collector temperature" 7A01 1300 (≙ 130 °C) "Start hysteresis solar circuit 7A02 70 (≙ 7 K) pump" "Stop hysteresis solar circuit 7A03 30 (≙...
  • Page 139 Commissioning/service reports Control parameters report (cont.) Internal hydraulics Parameter Code Delivered Commis- Mainte- condition sioning nance/ Service "Heat pump for drying a build- 7300 ing" "Time program for screed dry- 7303 ing" "Flow temperature for external 730C 500 (≙ 50 °C) demand"...
  • Page 140 Commissioning/service reports Control parameters report (cont.) Heating circuit 1 Parameter Code Delivered Commis- Mainte- condition sioning nance/ Service "Standard room temperature" 2000 200 (≙ 20 °C) "Reduced room temperature" 2001 160 (≙ 16 °C) "Remote control" 2003 "Heating curve level" 2006 0 (≙...
  • Page 141 Commissioning/service reports Control parameters report (cont.) Cooling Parameter Code Delivered Commis- Mainte- condition sioning nance/ Service "Cooling function" 7100 "Cooling circuit" 7101 "Set room temperature sepa- 7102 200 (≙ 20 °C) rate cooling circuit" "Min. flow temperature cool- 7103 50 (≙ 5 °C) ing"...
  • Page 142 Commissioning/service reports Control parameters report (cont.) Parameter Code Delivered Commis- Mainte- condition sioning nance/ Service "Humidity value for raising the 7D19 65 % flow rate" "Interval time frost protection 7D1A 15 min ventilation" "Intensive ventilation dura- 7D1B 120 min tion" "Actual source room tempera- 7D1D ture"...
  • Page 143 Commissioning/service reports Control parameters report (cont.) Parameter Code Delivered Commis- Mainte- condition sioning nance/ Service "Raise set DHW cylinder tem- 7E21 0 (≙ 0 K) perature PV" "Raise set heating water buffer 7E22 0 (≙ 0 K) cylinder temp PV" "Raise set room temperature 7E23 0 (≙...
  • Page 144 Commissioning/service reports Control parameters report (cont.) Control Parameter Code Delivered Commis- Mainte- condition sioning nance/ Service "Lock out controls" 8800...

  • Page 145: Specification

    Specification Specification 230 V appliances Type AWT-AC 241.A04 241.A07 241.A10 241.A13 Heating output data to EN 14511 (A2/W35) Rated heating output 10.6 Fan speed Power consumption 0.91 1.73 2.20 3.25 Coefficient of performance ε 3.27 3.24 3.50 3.26 (COP) in heating mode Output control 1.1 to 3.8 1.3 to 7.7 4.4 to 9.9 5.0 to...
  • Page 146 Specification Specification (cont.) Type AWT-AC 241.A04 241.A07 241.A10 241.A13 Air intake temperature Cooling mode ■ Min. °C ■ Max. °C Heating mode ■ Min. °C –15 –15 –15 –15 ■ Max. °C Heating water (secondary circuit) Contents Minimum volume Minimum flow rate (must be 1000 1600 1600...
  • Page 147 Specification Specification (cont.) Type AWT-AC 241.A04 241.A07 241.A10 241.A13 Internal unit electrical val- Heat pump control unit/PCB ■ Rated voltage, control 1/N/PE 230 V/50 Hz unit/PCB ■ Fuse protection, power 1 x B16A supply ■ Internal fuse 6.3 A (slow)/250 V Instantaneous heating water heater ■...
  • Page 148 Specification Specification (cont.) Type AWT-AC 241.A04 241.A07 241.A10 241.A13 Integral loading cylinder Contents Continuous output for DHW heating from 10 to 60 °C Performance factor N DIN 4708 Max. draw-off rate at the l/min 16.8 16.8 17.3 17.3 specified performance factor and DHW heating from 10 to 45 °C Max.
  • Page 149 Specification Specification (cont.) Type AWT-AC 241.A04 241.A07 241.A10 241.A13 Connections Heating water flow Cu 28 x Cu 28 x Cu 28 x Cu 28 x 1 Heating water return Cu 28 x Cu 28 x Cu 28 x Cu 28 x 1 Cold water ¾...
  • Page 150 Specification Specification (cont.) Type AWT-AC 241.B10 241.B13 Heating output data to EN 14511 (A7/W35, 5 K spread) Rated heating output 10.16 12.07 Fan speed Air flow rate 3456 4217 Power consumption 2.00 2.57 Coefficient of performance ε 5.08 4.69 (COP) in heating mode Output control 5.2 to 15.0 6.2 to 16.5...
  • Page 151 Specification Specification (cont.) Type AWT-AC 241.B10 241.B13 Heating water (secondary circuit) Contents Minimum volume Minimum flow rate (must be 1600 1600 maintained) Max. external pressure drop mbar (RFH) at minimum flow rate Max. flow temperature °C External unit electrical val- ■...
  • Page 152 Specification Specification (cont.) Type AWT-AC 241.B10 241.B13 Electrical power con- sumption ■ Fan (max.) ■ External unit (max.) ■ Secondary pump (PWM) 3 to 50 3 to 50 ■ Control unit/PCB, external unit (max.) ■ Control unit/PCB, internal unit (max.) ■...
  • Page 153 Specification Specification (cont.) Type AWT-AC 241.B10 241.B13 External unit dimensions Total length Total width Total height 1255 1255 Internal unit dimensions Total length Total width Total height 2075 2075 Total weight External unit Internal unit Permissible operating pressure, secondary side Connections Heating water flow Cu 28 x 1...

  • Page 154: Appendix

    Components for ventilation fully installed (optional) Components for PV system fully installed (optional) Preferred appointment: Date Time Date Time The work that is requested to be carried out by Viessmann will be billed in accordance with the latest Viessmann pricelist. Place/date Signature...

  • Page 155: Declaration Of Conformity

    A The product characteristics determined as system values for the product Vitocal 242-S (see technical guide) can be utilised to assess the energy consumption of heating and ventilation systems to DIN V 4701-10 specified by the EnEV [Ger- many].

  • Page 156: Keyword Index

    Keyword index Keyword index Adjustable feet........15 Cable cross-section......9 Air discharge........12 – Instantaneous heating water heater Air discharge grille removal....75 power cable........58 Air intake..........12 – Power cable, external unit..56, 57 Air short circuit........11 – Power cable, heat pump control unit55 Air vent valve, secondary circuit..91 Cable length.........9 Aligning the appliance......15 Cable lengths........9...
  • Page 157 Keyword index Keyword index (cont.) Compensating vibrations....27 Cover of external unit, mounting..62 Compressor......93, 94, 95 Curve Compressor max. tilting angle...13 – Temperature sensor, type Pt500A..98 Concrete foundations......15 – Temperature sensor type NTC 10 Condensate drain......10, 15 kΩ..........97, 99 Condensate pan.........10 –...
  • Page 158 Keyword index Keyword index (cont.) External unit EA1 extension........49 – Cable lengths........9 Economy tariff......55, 56, 58 – Checking electrical connections..76 Economy tariff meter....59, 61 – Cleaning.........75 Electrical connection – Closing..........62 – Circulation pumps.....43, 46 – Dimensions......148, 153 – External unit........52 –...
  • Page 159 Keyword index Keyword index (cont.) Flow temperature sensor, system48, 96 High pressure fault......11 Free running of the fan, check for..75 High pressure switch....93, 94 Freestanding siting......10 Hot gas line..8, 28, 30, 67, 149, 153 Frost stat connection......48 – Internal unit........33 Function check........87 –...
  • Page 160 Keyword index Keyword index (cont.) Internal unit Minimum clearances – Cable lengths........9 – External unit........12 – Dimensions.......7, 148, 153 – Internal unit........16 – Electrical connection.......42 Minimum flow rate......36 – Electrical values....147, 151 Minimum room volume.......16 – Internal components.......90 Minimum system pressure...72, 73 –...
  • Page 161 Keyword index Keyword index (cont.) Parts, hydraulics Parameters – External unit, type AWT-AC 241.A10, – Cooling function......84 A13..........125 – Electric booster heater....85 – External unit, type AWT-AC 241.B10, – External functions......83 B13..........133 – For on-site components....81 Parts, internal unit......102 – For the heat pump......80 Parts lists, external unit....127 –...
  • Page 162 Keyword index Keyword index (cont.) Power supply Refrigerant lines........8 – Compressor........52 – Fitting oil lift bends......24 – External unit........56 – Line lengths......25, 69 – General information......54 – Mounting nuts.........28 – Heating water heat pump control – Nuts, mounting.......33 unit..........48 – Nuts, removing.......31 –...
  • Page 163 Keyword index Keyword index (cont.) Sealing the appliance......23 Solar circuit return temperature sen- Seal washers........72 sor..........49, 91 Secondary circuit Solar thermal system – Filling and venting......71 – Parameter settings......84 Secondary circuit, connecting....34 Sound insulation........15 Secondary circuit, filling.....36 Sound insulation mat......62 Secondary circuit, filling and venting..72 Sound power......149, 153 Secondary circuit, venting....36...
  • Page 164 Keyword index Keyword index (cont.) Starting sequence for heat pump..77 TNC system.........59, 61 Starting the appliance......77 Top-up water........71 Starting the heat pump.......77 Torque Start sequence of the heat pump..77 – Refrigerant lines.......29, 33 Support for floorstanding installa- – Service valve union nut....69, 70 tion..........10, 14 Total weight......15, 148, 153 Swimming pool........50...
  • Page 168 Serial No.: 7502081 7502082 7513685 7513686 7514941 7514942 7552198 7552199 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:

Awt-ac 241.a04Awt-ac 241.a07Awt-ac 241.a10Awt-ac 241.a13Awt-ac 241.b10Awt-ac 241.b13

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