Viessmann Vitocal 222-S Installation And Service Instructions Manual
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Viessmann Vitocal 222-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 222-S
Type AWT-AC 221.A04 to A13, B10, B13
Compact heat pumps, split version for heating and cooling opera-
tion
For applicability, see the last page
VITOCAL 222-S
Please keep safe.
5546 713 GB
7/2014

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Summary of Contents for Viessmann Vitocal 222-S

  • Page 1 VIESMANN Installation and service instructions for contractors Vitocal 222-S Type AWT-AC 221.A04 to A13, B10, B13 Compact heat pumps, split version for heating and cooling opera- tion For applicability, see the last page VITOCAL 222-S Please keep safe. 5546 713 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 the refrigerant lines................24 Connecting the secondary circuit................. 34 Connecting the DHW side..................37 Connecting a cooling circuit if required..............
  • Page 5 Index Index (cont.) Parts lists, external unit 230 V~, type AWT-AC 221.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 221.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 G Hot gas line D Opening for 230 V cables H Heating water flow E Cold water K Heating water return F Liquid 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 221.A04 221.A07 221.A10 221.A13 221.B10 221.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 221.B10 ≥ 100 ≥ 200 ≥ 400 ≥ 300 ≥ 1000 221.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 221.A04 volume in m 221.A07 221.A04 221.A10 221.A07 221.A13 221.A10 221.B10 221.A13 221.B13 221.B10 221.B13...
  • Page 17 Installation sequence Installing the internal unit (cont.) Removing the cylinder module...
  • Page 18 Installation sequence Installing the internal unit (cont.) 193B 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. Fit 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 The Refrigerant Lines

    Installation sequence Installing the internal unit (cont.) Connecting the 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 the refrigerant lines (cont.) Routing refrigerant lines Type AWT-AC 221.A04 221.A07 221.A10 221.A13 221.B10 221.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...
  • Page 26 Installation sequence Connecting the 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 the 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 the refrigerant lines (cont.) Connection to the external unit Example: type AWT-AC 221.A04 C Liquid line D Hot gas line 1. Type AWT-AC 221.A04 and A07: Please note Remove the side cover: See Ensure that no contamination page 52.
  • Page 29 Installation sequence Connecting the refrigerant lines (cont.) Type AWT-AC 221.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 the 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 the 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 the 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. ■...
  • Page 33 Installation sequence Connecting the refrigerant lines (cont.) 6. Type AWT-AC 221.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 the refrigerant lines (cont.) Type AWT-AC Cable Connection Torque in Nm to internal unit 221.A13 Liquid line 7 10 mm ⅝ UNF 33 to 42 Hot gas line 7 16 mm ⅞ UNF 63 to 77 221.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 A Cooling Circuit If Required

    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.) Please note The BUS cable must be routed In terms of safety, the BUS cable together with the 230 V cables. for the internal/external unit (12 V or 43 V) does not count as a LV lead.
  • Page 40 Installation sequence Electrical connection (cont.) Internal unit: Routing the 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 221.A04 and for instantaneous heating water 221.A07: heater 230 V~/400 V~ 43 V BUS cable: Routing in the B Connecting cables for 230 V~ func- 230 V~ voltage range (connection, tion components see page 53) C LV connecting leads (sensors, KM...
  • Page 42 Installation sequence Electrical connection (cont.) Internal unit: Overview of connections 12 V P202 P203 43 V F101...
  • Page 43 Installation sequence Electrical connection (cont.) A Expansion PCB on main PCB: Make F Switching module and power supply no on-site connections for instantaneous heating water B Main PCB: See page 43. heater: See page 58. F3 Fuse 6.3 A (slow) C Controller and sensor PCB: See page 48.
  • 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 3-way diverter valve for Connection values heating water buffer cylin- ■...
  • Page 46 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 Internal unit: Expansion PCB on main PCB (function compo- nents 230 V~) Make no on-site connections.
  • 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 (accessories) (see "Modbus distributor" in- stallation 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 221.A04 221.A07 221.A10/A13, 221.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 221.A04 221.A07 221.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 221.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. Ticking the heat pump type on the type plate of the internal unit (as per external unit type plate) • • • 21.

  • 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 221.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: Filling The Refrigerant Lines And Internal Unit

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Filling the refrigerant lines and internal unit Note 2. Undo the caps from the fill valves of ■ The external unit is pre-filled 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 filling capacity per metre the external unit. Open both fill valves line 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. ■ Open DHW heating air vent valve (see following chapter);...

  • Page 73: Checking Expansion Vessel And Heating Circuit Pressure

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Opening the air vent valve for DHW heating Checking expansion vessel and heating circuit pressure Observe engineering informa- tion. Heat pump technical guide...

  • Page 74: Cleaning The Dhw Cylinder

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) 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. may damage the DHW cylinder. Only open DHW and heating water connections with a depres- Please note...
  • Page 75 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 76: 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 77: 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 78: 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 79 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 80 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Language Date Date/time Time Start commissioning? Coding Parameter group Parameter 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 81 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 222-S, type AWT-AC 221.A04 221.A07 221.A10 221.A13 221.B10 221.B13 "Output compressor stage...
  • Page 82 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 83 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 84 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 "3" EA1 and AM1 7010" Note For parameters for external functions, see the following...
  • Page 85 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 86 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Swimming pool water heating Parameters for swimming pool heating Setting "System definition" Ó "1" or "3" "External extension 7010" "System definition" Ó "1" "Swimming pool 7008" Ventilation Ventilation unit parameters Setting "Ventilation"...
  • Page 87 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Energy meter Electricity meter parameters Setting "Photovoltaics" Ó "1" "Enable own energy consumption PV 7E00" "Photovoltaics" Ó "0" to "300" "Threshold for electrical power 7E04" (≙ 0 to 30 kW) Extended menu: "PV ctrl strategy"...
  • Page 88 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 89: Troubleshooting

    Troubleshooting Repairs Overview of electrical components See from page 42. Opening programming unit...
  • Page 90 Troubleshooting Repairs (cont.) Removing cover from programming unit, if necessary...
  • Page 91 Troubleshooting Repairs (cont.) Overview of internal components: Internal unit a:C]...
  • Page 92 Troubleshooting Repairs (cont.) Flow temperature sensor, sec- Service valve, internal unit: ondary circuit (alternative posi- Schrader valve, can be used in tions) place of the external unit service Cylinder temperature sensor valve for pressure checks and Secondary circuit return tem- evacuating the refrigerant cir- perature sensor cuit;...
  • Page 93 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 94 Troubleshooting Repairs (cont.) External unit 4 kW, type AWT-AC 221.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) L Liquid separator (OMT)
  • Page 95 Troubleshooting Repairs (cont.) External unit 7 kW, type AWT-AC 221.A07 A Fan G Compressor head temperature sen- B Heat exchanger (evaporator) sor (CTT) C Temperature sensor, air intake, H High pressure switch (pHi) K Liquid separator evaporator (OAT) D Evaporator temperature sensor L Temperature sensor, refrigerant (OMT) inlet, evaporator (OCT)
  • Page 96 Troubleshooting Repairs (cont.) External unit 10/13 kW, type AWT-AC 221.A10, 221.A13, 221.B10, 221.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 97 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 98 Troubleshooting Repairs (cont.) Temperature sensors in the internal unit (with ID label) Viessmann NTC 10 kΩ (blue ID label) Outside temperature sensor Further sensors -20 -10 10 20 30 Temperature in °C 10 30 50 70 90 110 Temperature in °C...
  • Page 99 Troubleshooting Repairs (cont.) Temperature sensors in the external unit (without ID label) 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 222-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...
  • 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 Angle profile, lower casing, left 0004 Angle profile, lower casing, right 0005 Top panel, lower casing 0006 Retaining rail 0007 Insulation, bottom panel 0008 Connection line, heating water flow/return 0009...
  • Page 109 Parts lists, internal unit Hydraulics, internal unit (cont.) Pos. Component 0041 Screws (set) 0042 Gasket A 21 x 30 x 2.0 mm 0043 Spring clips (set) 0044 Solder connections (set) 0045 Reducers (set) 0046 Liquid line 7 10 mm 0047 Hot gas line 7 15 mm Parts not shown Pos.
  • Page 110 Parts lists, internal unit Hydraulics, internal unit (cont.) 0037 0005 0038 0031 0032 0027 0043 0030 0023 0008 0030 0044 0031 0041 0034 0023 0032 0023 0043 0036 0037 0045 0038 0035 0036 0020 0042 0047 0031 0043 0035 0016 0028 0046 0035...

  • Page 111: Cylinder, Internal Unit

    Parts lists, internal unit Cylinder, internal unit Pos. Component 0001 DHW cylinder with internal indirect coil 170 l 0002 Back panel, casing top 0003 Retaining plate for connection hoses 0004 Retaining bracket, DHW cylinder 0005 Return hose, DHW heating 0006 Flow hose, DHW heating 0007 Connector, DHW line...
  • Page 112 Parts lists, internal unit Cylinder, internal unit (cont.) 0007 0019 0029 0012 0027 0029 0008 0016 0015 0019 0014 0029 0029 0029 0013 0004 0001 0028 0015 0002 0014 0018 0026 0017 0029 0010 0025 0029 0026 0026 0029 0020 0016 0009 0011...

  • Page 113: Parts Lists, External Unit 230 V~, Type Awt-Ac 221.A04

    Parts lists, external unit 230 V~, type AWT-AC 221.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 221.A04...

  • Page 114: External Unit 230 V

    Parts lists, external unit 230 V~, type AWT-AC 221.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 221.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 221.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 221.A07...
  • Page 117 Parts lists, external unit 230 V~, type AWT-AC 221.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 221.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 221.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 221.A10, A13 Overview of assemblies 230 V~ Type AWT-AC 221.A10, A13...

  • Page 121: Overview Of Assemblies 230 V

    Parts lists, external unit 230 V~, type AWT-AC 221.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 221.A10, A13 Pos.

  • Page 122: Casing, External Unit 230 V

    Parts lists, external unit 230 V~, type AWT-AC 221.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 221.A10, A13 Electrical equipment, external unit 230 V~ Type AWT-AC 221.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 221.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 221.A10, A13 Hydraulics, external unit 230 V~ Type AWT-AC 221.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 221.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 221.B10, B13

    Parts lists, external unit 400 V~, type AWT-AC 221.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 221.B10, B13 Overview of assemblies 400 V~ Type AWT-AC 221.B10, B13...

  • Page 129: Overview Of Assemblies 400 V

    Parts lists, external unit 400 V~, type AWT-AC 221.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 221.B10, B13 Pos.

  • Page 130: Casing, External Unit 400 V

    Parts lists, external unit 400 V~, type AWT-AC 221.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 221.B10, B13 Electrical equipment, external unit 400 V~ Type AWT-AC 221.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 221.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 221.B10, B13 Hydraulics, external unit 400 V~ Type AWT-AC 221.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 221.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.) Electric booster heater Parameter Code Delivered Commis- Mainte- condition sioning nance/ Service "Enable instantaneous heat- 7900 ing water heater" "Enable electric heaters for 7901 DHW heating" "Enable instant. heating water 7902 heater for central heating" "Max.
  • Page 139 Commissioning/service reports Control parameters report (cont.) Heating water buffer cylinder Parameter Code Delivered Commis- Mainte- condition sioning nance/ Service "Enable buffer cylinder/low 7200 loss header" "Temp in operating status 7202 500 (≙ 50 °C) fixed value for buffer cyl" "Hysteresis temperature heat- 7203 50 (≙...
  • Page 140 Commissioning/service reports Control parameters report (cont.) Heating circuit 2 Parameter Code Delivered Commis- Mainte- condition sioning nance/ Service "Standard room temperature" 3000 200 (≙ 20 °C) "Reduced room temperature" 3001 160 (≙ 16 °C) "Remote control" 3003 "Heating curve level" 3006 0 (≙...
  • Page 141 Commissioning/service reports Control parameters report (cont.) Ventilation Parameter Code Delivered Commis- Mainte- condition sioning nance/ Service "Vitovent enable" 7D00 "Enable preheater bank elec- 7D01 tric" "Enable reheater bank hy- 7D02 draulic" "Enable humidity sensor" 7D05 "Enable CO2 sensor" 7D06 "Set extract air temperature" 7D08 200 (≙...
  • Page 142 Commissioning/service reports Control parameters report (cont.) Photovoltaics Parameter Code Delivered Commis- Mainte- condition sioning nance/ Service "Enable own energy con- 7E00 sumption PV" "Prop. of external current" 7E02 10 (≙ 10 %) "Threshold for electrical pow- 7E04 0 (≙ 0 W) er"...
  • Page 143 Commissioning/service reports Control parameters report (cont.) Communication Parameter Code Delivered Commis- Mainte- condition sioning nance/ Service "Enable LON communication 7710 module" "LON subscriber number" 7777 "LON fault manager" 7779 "LON system number" 7798 "Interval for data transfer via 779C 20 min LON"...

  • Page 144: Specification

    Specification Specification 230 V appliances Type AWT-AC 221.A04 221.A07 221.A10 221.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 145 Specification Specification (cont.) Type AWT-AC 221.A04 221.A07 221.A10 221.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 16.7 16.7 17.7 17.7 Minimum volume Minimum flow rate (must be...
  • Page 146 Specification Specification (cont.) Type AWT-AC 221.A04 221.A07 221.A10 221.A13 Internal unit electrical val- Heat pump control unit/PCB ■ Rated voltage, control 1/N/PE 230 V/50 Hz unit/PCB ■ MCB/fuse protection, 1 x B16A power supply ■ Internal fuse 6.3 A (slow)/250 V Instantaneous heating water heater ■...
  • Page 147 Specification Specification (cont.) Type AWT-AC 221.A04 221.A07 221.A10 221.A13 Integral DHW 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 14.3 14.8 15.9 16.5 specified performance factor and DHW heating from 10 to 45 °C Max.
  • Page 148 Specification Specification (cont.) Type AWT-AC 221.A04 221.A07 221.A10 221.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 149 Specification Specification (cont.) Type AWT-AC 221.B10 221.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 150 Specification Specification (cont.) Type AWT-AC 221.B10 221.B13 Heating water (secondary circuit) Contents 17.7 17.7 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 151 Specification Specification (cont.) Type AWT-AC 221.B10 221.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 152 Specification Specification (cont.) Type AWT-AC 221.B10 221.B13 Internal unit dimensions Total length Total width Total height 1829 1829 Total weight External unit Internal unit Permissible operating pressure, secondary side Connections Heating water flow Cu 28 x 1 Cu 28 x 1 Heating water return Cu 28 x 1 Cu 28 x 1...

  • Page 153: 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 154: Declaration Of Conformity

    A The product characteristics determined as system values for the product Vitocal 222-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 155: Keyword Index

    Keyword index Keyword index Assembly, hydraulic Adjustable feet........15 – External unit, type AWT-AC 221.A10, Air discharge........12 A13..........125 Air discharge grille removal....76 – External unit, type AWT-AC 221.B10, Air intake..........12 B13..........133 Air short circuit........11 – Internal unit........108 Air vent valve, DHW cylinder.....92 AVI PCB.........43, 51, 53 Air vent valve, secondary circuit..92 Aligning the appliance......15...
  • Page 156 Keyword index Keyword index (cont.) Cold water connection..8, 148, 152 Cooling water flow......38 Commissioning....65, 79, 153 Copper seal ring.........33 Commissioning order.......153 Corrosion damage.......75, 76 Commissioning report......65 Cover of external unit, fitting....62 Commissioning wizard.......78 Curve Communication interface....49 – Temperature sensor, type Pt500A..98 Compensating vibrations....27 –...
  • Page 157 Keyword index Keyword index (cont.) External functions......84 EA1 extension........49 External unit Economy tariff......55, 56, 58 – Cable lengths........9 Economy tariff meter....59, 61 – Checking electrical connections..77 Electrical connection – Cleaning.........76 – Circulation pumps.....43, 46 – Closing..........62 – External unit........52 – Dimensions......147, 151 –...
  • Page 158 Keyword index Keyword index (cont.) Free running of fan, checking....76 Hot gas line..8, 28, 30, 67, 148, 152 Freestanding siting......10 – Internal unit........33 Frost stat connection......48 – Torque..........29 Function check........88 Hydraulic connecting chamber...37 Function components 230 V~....41 Hydraulic connections......8 Function components 230 V~..43, 46 Hydraulic parameters.......135 Fuse –...
  • Page 159 Keyword index Keyword index (cont.) Internal unit Minimum clearances – Cable lengths........9 – External unit........12 – Dimensions.......7, 147, 152 – Internal unit........16 – Electrical connection.......42 Minimum flow rate......36 – Electrical values....146, 150 Minimum room volume.......16 – Installation........15 Minimum system pressure....72 –...
  • Page 160 Keyword index Keyword index (cont.) Parts, hydraulic Parameters – External unit, type AWT-AC 221.A10, – Cooling function......85 A13..........125 – Electric booster heater....85 – External unit, type AWT-AC 221.B10, – External functions......84 B13..........133 – Heat pump........81 – Internal unit........108 – Instantaneous heating water heater85 Parts, internal unit......102 –...
  • Page 161 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 – Nuts, mounting.......33 – Heating water heat pump control – Nuts, removing.......31 unit..........48 – Union nuts, mounting......28 –...
  • Page 162 Keyword index Keyword index (cont.) Secondary circuit Spare parts – Filling and venting......71 – External unit, type AWT-AC Secondary circuit, connecting....34 221.A04........113 Secondary circuit, filling.....36 – External unit, type AWT-AC Secondary circuit, filling and venting..72 221.A07........116 Secondary circuit, venting....36 – External unit, type AWT-AC 221.A10, Secondary circuit connection set.
  • Page 163 Keyword index Keyword index (cont.) System pressure check......72 Transport........13, 15 System user, instructing.....88 Tube clip with EPDM insert....27 Type-dependent heating output..81 Temperature limiter......45 Temperature sensor......97 Underfloor heating......45 – Air intake, evaporator (OAT)94, 95, 96 Underfloor heating circuit....45 – Compressor head (CTT)..94, 95, 96 Union nuts, replacing......33 –...
  • Page 164 Serial No.: 7502079 7502080 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 221.a04Awt-ac 221.a07Awt-ac 221.a10Awt-ac 221.a13Awt-ac 221.b10Awt-ac 221.b13

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