Viessmann Vitocal 222-A Installation And Service Instructions Manual
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Viessmann Vitocal 222-A Installation And Service Instructions Manual

Type awot(-m)-e/awot(-m)-e-ac 221.a04 to a16 heat pump compact appliance, monoblock version
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VIESMANN
Installation and service instructions
for contractors
Vitocal 222-A
Type AWOT(-M)-E/AWOT(-M)-E-AC 221.A04 to A16
Heat pump compact appliance, monoblock version
VITOCAL 222-A
Please keep safe.
5831412 GB
3/2018

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Summary of Contents for Viessmann Vitocal 222-A

  • Page 1 VIESMANN Installation and service instructions for contractors Vitocal 222-A Type AWOT(-M)-E/AWOT(-M)-E-AC 221.A04 to A16 Heat pump compact appliance, monoblock version VITOCAL 222-A Please keep safe. 5831412 GB 3/2018...
  • Page 2 Prior to removing covers from the appliances, Replace faulty components only with genuine wait at least 4 minutes until the voltage has Viessmann spare parts. completely dropped out. Safeguard the system against reconnection. ■ Wear suitable personal protective equipment when ■...
  • Page 3 Installing non-authorised components and making non-approved modifications or con- versions can compromise safety and may inva- lidate our warranty. For replacements, use only original spare parts supplied or approved by Viessmann.
  • Page 4 Index Index 1. Information Disposal of packaging ................Symbols ....................Intended use ..................Product information ................2. Preparing for installation Requirements for on-site connections ........... Indoor unit ................... ■ Outdoor unit ..................10 ■ 3. Installation sequence Installing the outdoor unit ............... 12 Installation information ................
  • Page 5 Ω ■ Indoor unit: Viessmann NTC 20 k (orange marking) ......88 Ω ■ Indoor unit: Viessmann Pt500A (green marking) ........ 89 ■ Outdoor unit: Viessmann NTC 10 k (no marking) ......90 Ω ■ Checking the fuses ................90 6.
  • Page 6 Please dispose of packaging waste in line with statu- DE: Use the disposal system organised by tory regulations. Viessmann. AT: Use the ARA statutory disposal system (Altstoff Recycling Austria AG, licence number 5766). CH: Packaging waste is disposed of by the HVAC contractor.
  • Page 7 Product information Layout In conjunction with installation kit with mixer (accessories) The Vitocal 222-A is a monoblock compact heat pump ■ Central heating appliance, comprising 1 indoor unit with integral DHW The heat pump heats 1 heating/cooling circuit with- cylinder and 1 outdoor unit.
  • Page 8 Indoor unit Outdoor unit AWOT-E 221.A 230 V~ 400 V~ – AWOT-M-E 221.A 230 V~ 230 V~ – AWOT-E-AC 221.A 230 V~ 400 V~ AWOT-M-E-AC 221.A 230 V~ 230 V~ System examples For available system examples, see www.viessmann- schemes.com...
  • Page 9 Preparing for installation Requirements for on-site connections Indoor unit A BC D E C D E Fig. 1 Heating water return G 1 (female thread) Return, outdoor unit (heating water outlet) G 1 ¼ ¼ Cold water G (female thread) (union nut DN 32, female thread) ¾...
  • Page 10 Preparing for installation Requirements for on-site connections (cont.) Flow, outdoor unit (heating water outlet) G 1 ¼ (union nut DN 32, female thread) Cable entry for electrical cables on the back of the appliance: ■ LV leads < 42 V Power cables 400 V~/230 V~ ■...
  • Page 11 Preparing for installation Requirements for on-site connections (cont.) Outdoor units, types 221.A10 to A16 1109 Fig. 3 Outdoor unit flow (heating water outlet) G 1 Power cable inlet ¼ (union nut supplied, female thread) Modbus cable inlet for indoor/outdoor unit Outdoor unit return (heating water outlet) G 1 ¼...
  • Page 12 Installation sequence Installing the outdoor unit Installation information Types of installation: Condensate: Floorstanding installation with line entry above Ensure that condensate can drain freely. ■ ■ ground level Create a permanent gravel bed under the outdoor ■ Floorstanding installation with line entry below unit as a soakaway.
  • Page 13 Installation sequence Installing the outdoor unit (cont.) Weight of outdoor units Vitocal 200-A Type Weight in kg 230 V appliances AWOT-M-E 221.A04 ■ AWOT-M-E-AC ■ 221.A06 221.A08 221.A10 221.A13 221.A16 400 V appliances AWOT-E 221.A10 ■ AWOT-E-AC ■ 221.A13 221.A16 Installation location Select a site with good air circulation, so that the Select an installation location where the evaporator...
  • Page 14 Installation sequence Installing the outdoor unit (cont.) Outdoor unit minimum clearances Types 221.A04 to A08 1000 Fig. 4 Air intake Air discharge ■ Line entry above ground level: 200 mm ≥ Line entry below ground level: ■ 900 mm ≥...
  • Page 15 Installation sequence Installing the outdoor unit (cont.) Types 221.A10 to A16, 230 V~ and 400 V~ 1000 Fig. 5 Air intake Air discharge ■ Line entry above ground level: 200 mm ≥ Line entry below ground level: ■ 900 mm ≥...
  • Page 16 Installation sequence Installing the outdoor unit (cont.) 1100 Fig. 6 Frost protection for foundations (compacted Fixing points for floorstanding installation supports crushed stone, e.g. 0 to 32/56 mm); thickness of Only for line entry below ground level: Hydraulic layer subject to local requirements and building connection set (accessories) regulations Foundation strip...
  • Page 17 Installation sequence Installing the outdoor unit (cont.) Floorstanding installation with support; line entry Support for floorstanding installation (accessories) above ground level Foundation strip Frost protection for foundations (compacted crushed stone, e.g. 0 to 32/56 mm); thickness of layer subject to local requirements and building regulations Flexible separating layer between the foundations and the building...
  • Page 18 Installation sequence Installing the outdoor unit (cont.) Floorstanding installation with support; line entry below ground level 3000 1100 Fig. 8 Ground Floorstanding installation connection set (accesso- Pathway, patio ries) Support for floorstanding installation (accessories) Hydraulic connection set (accessories) Openings in the base plate for free drainage of Foundation strip condensate: Frost protection for foundations (compacted...
  • Page 19 Installation sequence Installing the outdoor unit (cont.) Installing an outdoor unit on foundations Note We recommend letting condensate drain away freely (no condensate pipe). Fig. 9 Support for floorstanding installation (accessories) Gravel bed as condensate soakaway Concrete foundations (see technical guide) Only for line entry below ground level: Hydraulic connection set (accessories) Wall mounting...
  • Page 20 Installation sequence Installing the outdoor unit (cont.) Wall mounting with bracket set Fig. 10 Gravel bed as condensate soakaway Anti-vibration mounts (standard delivery of bracket) Hydraulic connection lines, indoor/outdoor unit Indoor/outdoor unit Modbus cable and outdoor unit power cable: Route the cables so they are not stressed. Connection set, wall mounting (accessories) Openings in the base plate for free drainage of condensate:...
  • Page 21 Installation sequence Installing the outdoor unit (cont.) Opening the wiring chamber Opening the outdoor unit wiring chamber: Types Opening the outdoor unit wiring chamber: Types 221.A04 to 221.A08 221.A10 to 221.A16 Fig. 11 Compressor power supply Modbus connection (connection to the indoor unit) Fig.
  • Page 22 Installation sequence Installing the outdoor unit (cont.) Removing the transport brackets 1. 2x Fig. 13...
  • Page 23 Installation sequence Installing the outdoor unit (cont.) Connecting the supplied hoses Fig. 14 Outdoor unit return (heating water inlet) Outdoor unit flow (heating water outlet) Installing the indoor unit Transport Please note Impacts, compression and tensile loads can cause damage to the outside panels of the appliance.
  • Page 24 Installation sequence Installing the indoor unit (cont.) Requirements for the installation room Please note Please note Unfavourable ambient conditions can lead to Overloading the floor can result in damage to malfunctions and appliance damage. the building structure. ■ The installation room must be dry and free Observe the permissible floor load.
  • Page 25 Installation sequence Installing the indoor unit (cont.) Minimum room height Minimum room height a depends on the hydraulic con- nection set used. Hydraulic connection set Minimum room height a in mm For installation on finished walls, for 2200 ■ upward connection For installation to the left or right on 2000 ■...
  • Page 26 Recommendation: Install safety valve above top edge Viessmann also recommends the installation of a of cylinder. This means the DHW cylinder will not need drinking water filter when using plastic pipes to to be drained when working on the safety valve.
  • Page 27 Installation sequence Connecting the secondary circuit (cont.) This also particularly applies when connecting solar thermal systems. Connecting the secondary side 1. Connect the "hydraulic connection set, heating cir- cuit for installation on finished walls" (required accessories) to the heat pump. Separate installation instructions Note If the DHW circulation pipe is not required, tightly...
  • Page 28 Ensure the minimum volume and minimum flow rate in wards. the secondary circuit: See following table. Observe additional information regarding filling and venting: See "Filling and venting on the secondary side". Vitocal 222-A Type Minimum heating Minimum flow rate Secondary circuit system volume...
  • Page 29 Installation sequence Aligning the indoor unit SW17 Fig. 21 Type AWOT(-M)-E-AC only: Connecting the cooling circuit For area cooling systems (e.g. underfloor heating cir- cuit, chilled ceiling), a contact humidistat (accessories) is required.
  • Page 30 Installation sequence Type AWOT(-M)-E-AC only: Connecting the cooling circuit (cont.) Requirements for the contact humidistat: ■ Electrical connection, subject to the type of contact humidistat: – 24 V (recommended): Connection to F11 on the controller and sensor 230 V~, 0.5 A: –...
  • Page 31 Installation sequence Electrical connection Preparing the electrical connections Cables Danger For cable lengths and cable cross-sections, see the Incorrect wiring can lead to serious injury from ■ following tables. electrical current and result in appliance dam- ■ For accessories: age. Cables with the required number of cores for exter- Take the following measures to prevent drifting nal connections.
  • Page 32 Installation sequence Electrical connection (cont.) Outdoor units Vitocal 222-A Type Cable Max. cable length 230 V appliances AWOT-M-E 221.A04 29 m 3 x 2.5 mm ■ AWOT-M-E-AC ■ 221.A06 29 m 3 x 2.5 mm 221.A08 29 m 3 x 2.5 mm 221.A10...
  • Page 33 Installation sequence Electrical connection (cont.) Connecting the Vitoconnect (accessories) Fig. 24 Fig. 25...
  • Page 34 Installation sequence Electrical connection (cont.) Fig. 28 Fig. 26 Fig. 29 Fig. 27...
  • Page 35 Installation sequence Electrical connection (cont.) Indoor unit: Overview of connections F16F14 145 F0 193A Fig. 30 Power supply 230 V~: See page 47. Main PCB: See page 36. F1 Fuse 6.3 A (slow) F3 Fuse 6.3 A (slow) Luster terminals: See page 40. If available: X1 Terminals for earth conductors of all associ- Control module and power supply for instantane-...
  • Page 36 Installation sequence Electrical connection (cont.) Indoor unit: Main PCB (230 V~ components) Information regarding the connection values Set the required parameters during commissioning: The specified output is the recommended connected See page 68 onwards. ■ load. ■ Total output of all components connected directly to the heat pump control unit (e.g.
  • Page 37 Installation sequence Electrical connection (cont.) Connecting a temperature limiter as a maximum temperature limiter for underfloor heating Connecting a general temperature limiter Connecting the temperature limiter, part no. 7151728, X2.N 7151729 X2.N sÖ Fig. 31 Fig. 32 Connection to con- Circulation pump trol unit Heating circuit without mixer A1/HC1...
  • Page 38 Installation sequence Electrical connection (cont.) Terminals Function Explanation 214.3 External hook-up, heating/cooling cir- 230 V~ digital input: cuits: 230 V~: Central heating demand for heating circuit ■ Central heating demand, heating cir- M3/HC3 active cuit M3/HC3 0 V: No demand ■...
  • Page 39 Installation sequence Electrical connection (cont.) Plug Terminals Function Explanation 225.1 Heating circuit pump of the heating Connect a temperature limiter to restrict the maximum circuit with mixer M2/HC2 temperature for underfloor heating circuits (if installed) in series. Connection values: Output: 100 W ■...
  • Page 40 Installation sequence Electrical connection (cont.) Indoor unit: Luster terminals (signal and safety connections) Set the required parameters during commissioning: See page 68 onwards. Terminals Function Explanation X3.1 Switched phase Via control unit ON/OFF switch Note Observe the total load 1000 W of all connected compo- nents.
  • Page 41 Installation sequence Electrical connection (cont.) Indoor unit: Controller and sensor PCB (LV connections) Set the required parameters during commissioning: See page 68 onwards. Sensors Plug Sensor Type Outside temperature sensor NTC 10 k Ω Buffer temperature sensor NTC 10 k Ω...
  • Page 42 Installation sequence Electrical connection (cont.) Swimming pool heating Note ■ Swimming pool heating is controlled via EA1 exten- sion with KM-BUS. Make connections to EA1 extension only in accord- ■ ance with Fig. 34. A filter circuit pump cannot be controlled via the heat ■...
  • Page 43 Installation sequence Electrical connection (cont.) Outdoor unit: Routing cables to the wiring chamber Modbus 230 V/50 Hz Fig. 35 Example: AWOT-M 221.A10...
  • Page 44 Installation sequence Electrical connection (cont.) Outdoor unit: Overview of electrical connections Types 221.A04 to 221.A08, 230 V~ Types 221.A10 to 221.A16, 230 V~ Fig. 36 EEV PCB (refrigerant circuit controller) Fan fuse 6.3 A (slow) Refrigerant circuit controller fuse 6.3 A (slow) Inverter Mains terminals 230 V/50 Hz: See page 48.
  • Page 45 Installation sequence Electrical connection (cont.) Types 221.A10 to 221.A16, 400 V~ Fig. 38 EEV PCB (refrigerant circuit controller) Fan fuse 6.3 A (slow) Refrigerant circuit controller fuse 6.3 A (slow) Inverter Mains terminals 230 V/50 Hz: See page 48. Terminal for Modbus cable between indoor/outdoor unit: See next chapter.
  • Page 46 Installation sequence Electrical connection (cont.) Rx/Tx- Rx/Tx+ Modbus 230 V/ 50 Hz Fig. 39 Power supply Isolators for non-earthed conductors Danger ■ Install an isolator in the power cable to provide The absence of system component earthing can omnipolar separation from the mains for all active lead to serious injury from electrical current and conductors, corresponding to overvoltage category component damage in the event of an electrical...
  • Page 47 Installation sequence Power supply (cont.) The assignment of the power-OFF (for compressor For accessories and external components that will ■ ■ and/or instantaneous heating water heater) is made not be connected to the heat pump control unit, pro- via the type of connection and by setting parameters vide the power supply via the same MCB/fuse, or at in the heat pump control unit.
  • Page 48 Serious injury can be caused by electric current and appliance damage can result if wires drift into the adjacent voltage area. It is essential to insert the separator supplied. Max. cable length Vitocal 222-A Type Cable Max. cable length 230 V appliances AWOT-M-E 221.A04...
  • Page 49 Serious injury can be caused by electric current and appliance damage can result if wires drift into the adjacent voltage area. It is essential to insert the separator supplied. Max. cable length Vitocal 222-A Type Cable Max. cable length 400 V appliances AWOT-E 221.A10...
  • Page 50 Installation sequence Power supply (cont.) Instantaneous heating water heater power supply 1/N/PE 230 V/50 Hz Fig. 43 Mains terminals, switching module, instantaneous heating water heater Jumpers Remove both jumpers in the case of a 1/N/PE 230 V/50 Hz power supply. ■...
  • Page 51 Installation sequence Power supply (cont.) 3/N/PE 400 V/50 Hz Fig. 44 Mains terminals, switching module, instantaneous heating water heater Jumpers Do not remove jumpers in the case of a 3/N/PE 400 V/50 Hz power supply. ■ Recommended power cable: 5 x 2.5 mm Max.
  • Page 52 Installation sequence Power supply (cont.) X3.7 X3.6 (400 V~) 7 (230 V~) ≈ Fig. 45 Diagram excluding fuses and RCD Heat pump control unit (indoor unit, luster termi- nals: See chapter "Indoor unit: Overview of con- nections") Instantaneous heating water heater (if installed) Heat pump compressor (outdoor unit) Heat pump control unit power supply: See chapter "Heat pump control unit power supply 230 V~"...
  • Page 53 Installation sequence Power supply (cont.) X3.7 X3.6 5 (400 V~) (230 V~) ≈ Fig. 46 Diagram excluding fuses and RCD Heat pump control unit (indoor unit, luster termi- nals: See chapter "Indoor unit: Overview of con- nections") Instantaneous heating water heater (if installed) Heat pump compressor (outdoor unit) Heat pump control unit power supply: See chapter "Heat pump control unit power supply 230 V~"...
  • Page 54 Installation sequence Power supply (cont.) Mains power supply in conjunction with on-site power consumption Without power-OFF E1E2 D /D L1 L1 L2 L2 L3 L3 Fig. 47 Heat pump Bi-directional meter (for PV systems to consume Additional consumers (of power generated on site) power on site): in the household Energy taken from power supply utility and energy...
  • Page 55 Installation sequence Power supply (cont.) Connection to EA1 extension Condition: "Enable Smart Grid 7E80" must be at "1". [{{] 0-10V Fig. 48 EA1 extension Floating N/O contact 2: The agreement of the Connection to controller and sensor PCB power supply utility may be required Floating N/O contact 1: The agreement of the Power supply 1/N/PE 230 V/50 Hz power supply utility may be required...
  • Page 56 Installation sequence Closing the heat pump Please note Danger If a casing door is not securely closed this can The absence of system component earthing can lead to damage from condensation, vibrations lead to serious injury from electrical current and and excessive noise.
  • Page 57 Installation sequence Closing the heat pump (cont.) Fitting the side cover for the outdoor unit In reverse order to "Opening the outdoor unit wiring chamber": See page 21.

  • Page 58: Table Of Contents

    Commissioning, inspection, maintenance Steps - commissioning, inspection and maintenance Commissioning steps Inspection steps Maintenance steps Page • • • 1. Opening the heat pump..................... 59 • 2. Compiling reports......................59 • • 3. Checking the refrigerant circuit for leaks................ 59 •...

  • Page 59: Opening The Heat Pump

    Commissioning, inspection, maintenance Opening the heat pump Danger Please note Contact with live components can lead to seri- Commissioning immediately after siting the ous injury from electric current. Some compo- appliance can lead to appliance damage. nents on PCBs remain live even after the power Wait at least 30 min between siting and com- supply has been switched off.
  • Page 60 Commissioning, inspection, maintenance Filling and venting on the secondary side (cont.) Note ■ Moving the control unit panel into the service posi- tion: See page 80. ■ Opening the programming unit: See page 79. 02. Check the pre-charge pressure of the expansion vessel.

  • Page 61: Filling And Venting The Dhw Cylinder On The Dhw Side

    Commissioning, inspection, maintenance Filling and venting on the secondary side (cont.) 10. If necessary, vent the indirect coil in the DHW cyl- 12. Turn the 3-way diverter valve clockwise to the inder using air vent valve for the DHW cylinder. "AUTO"...

  • Page 62: Testing The Anode Connection

    Commissioning, inspection, maintenance Testing the anode connection A B C Fig. 53 1. Remove thermal insulation 2. Insert thermal insulation . Check that earth , ensuring it is imper- cable is connected to protective magnesium meable. anode Measuring the anode earth current with an anode tester A B C Fig.

  • Page 63: Testing The Protective Magnesium Anode

    Commissioning, inspection, maintenance Measuring the anode earth current with an anode… (cont.) 2. Connect the tester (measuring range up to 5 mA) 3. Insert thermal insulation , ensuring it is imper- in series across tab of protective magnesium meable. anode and earth cable Anode earth Protective magnesium anode current...

  • Page 64: Draining The Appliance On The Dhw Side

    Commissioning, inspection, maintenance Draining the appliance on the DHW side 1. Connect the hose to the drain valve and route it into a suitable container or drain outlet. Note Ensure adequate ventilation in the DHW pipework. 2. Turn drain valve from lever position to lever position as required.

  • Page 65: Checking The Indoor Unit Electrical Connections For Firm Seating

    Commissioning, inspection, maintenance Cleaning the DHW cylinder (cont.) 1. Remove the protective magnesium anode. 6. Flush the DHW cylinder thoroughly after cleaning. Danger 7. Fit the protective magnesium anode. The uncontrolled escape of DHW can cause scalding and building damage. Please note Only open DHW and heating water connec- A short circuit between the protective mag-...

  • Page 66: Cleaning The Outdoor Unit Heat Exchanger (Evaporator)

    Commissioning, inspection, maintenance Checking that the fan in the outdoor unit can… (cont.) Types 221.A04 to 221.A08 2. Turn the fan by hand. Fig. 57 Types 221.A10 to 221.A16 3. Turn the fans by hand. Fig. 58 Cleaning the outdoor unit heat exchanger (evaporator) Danger Danger If you touch live components or they come into...

  • Page 67: Checking The Outdoor Unit Electrical Connections For Firm Seating

    Commissioning, inspection, maintenance Cleaning the outdoor unit heat exchanger… (cont.) Cleaning with compressed air 3. Check the aluminium fins of the heat exchanger for deformation and scratches. If necessary, repair 1. Open the outdoor unit casing. with a suitable tool. Danger 4.

  • Page 68: Commissioning The System

    Commissioning, inspection, maintenance Commissioning the system Commissioning (configuration, parameter settings and Note function check) can be carried out with or without the The type and extent of the parameters depend on the commissioning wizard (see following chapter and serv- appliance type, on the selected system scheme and ice instructions for the heat pump control unit).
  • Page 69 Commissioning, inspection, maintenance Commissioning the system (cont.) Language Date/Time Time Date Start commissioning? Coding Parameter group Parameters level 1 select Temperature Sensor values sensors display Signal inputs Signal inputs display Actuator test Actuator test carry out Subscriber check (LON) Subscriber check carry out Function check Function...
  • Page 70 — — — — M3/HC3 — — — — — — — — Sep. cooling circuit SKK — Energy meter — Ventilation unit — X Component is selected. For detailed information on system examples: See Component may be added. www.viessmann-schemes.com.
  • Page 71 Commissioning, inspection, maintenance Commissioning the system (cont.) Parameters for circulation pumps and other components Heating circuit pump Parameter Setting "System definition" Ó "System scheme 7000" With heating circuit HC1 without mix- ■ With heating circuit HC2 with mixer ■ With heating circuit HC3 with mixer ■...
  • Page 72 Commissioning, inspection, maintenance Commissioning the system (cont.) External extension Parameter Setting "System definition" Ó "External extension 7010" "1" EA1 extension "2" AM1 extension "3" EA1 and AM1 extensions Note For parameters for external functions, see the following table. Parameters for external functions External demand Parameter Setting...
  • Page 73 Commissioning, inspection, maintenance Commissioning the system (cont.) External hook-up for heating/cooling circuits Parameter Setting "Heating circuit 1"/"Heating circuit 2"/"Heating circuit 3" Ó "Remote control 2003" "2" "Remote control 3003" "Remote control 4003" Type AWOT(-M)-E-AC: Cooling function parameters Cooling function on systems without buffer cylinder Parameter Setting "Cooling"...
  • Page 74 Commissioning, inspection, maintenance Commissioning the system (cont.) Room temperature sensor for separate cooling circuit Parameter Setting "Cooling" Ó "Ranking room temp sensor separate cooling circuit 7106" "0" Connection F16 "1" Heating circuit HC1 "2" Heating circuit HC2 "3" Heating circuit HC3 "4"...
  • Page 75 Commissioning, inspection, maintenance Commissioning the system (cont.) Parameters for swimming pool water heating Parameter Setting "System definition" Ó "External extension 7010" "1" or "3" "Swimming pool 7008" "1" Parameters for ventilation with Vitovent 200-C Parameter Setting "Ventilation" Ó "Vitovent enable 7D00" "2"...
  • Page 76 Commissioning, inspection, maintenance Commissioning the system (cont.) Adjust values for Vitovent 200-W/300-C/300-W if necessary Parameter Setting "Ventilation" Ó "Set room temperature C108" Max. 4 K higher or lower than "Stand- ard room temperature 2000" (adjust- ≙ ment value: 1 0.1 °C) "Background ventilation C109"...
  • Page 77 Commissioning, inspection, maintenance Commissioning the system (cont.) Parameters for utilisation of power generated on site Parameter Setting "Photovoltaics" Ó "Enable own energy consumption PV 7E00" "1" ≙ "Threshold for electrical power 7E04" "0" to "300" ( 0 to 30 kW) Enable required functions for utilisation of power generated on site Parameter Setting...

  • Page 78: Checking The Heat Pump For Noise

    Commissioning, inspection, maintenance Checking the heat pump for noise Checking the appliance for unusual noises, e.g. oper- ating noise of fan, compressor and pumps. Venting again if required. Checking the system function ■ Check the function of all system components, e.g. Please note circulation pumps, 3-way diverter valves.
  • Page 79 Maintenance Overview of electrical components Indoor unit: ■ See page 35 onwards. ■ Outdoor unit: See page 44 onwards. Indoor unit: Opening the programming unit Fig. 62 Removing the cover from the programming unit if necessary Fig. 63...
  • Page 80 Maintenance Indoor unit: Placing the control unit panel in its service position Fig. 64...
  • Page 81 Maintenance Overview of internal components: Indoor unit Flow switch Secondary pump DHW cylinder air vent valve Secondary circuit drain and fill valve Additionally, in conjunction with solar indirect coil set: Cylinder temperature sensor Drain and fill valve, DHW side High limit safety cut-out (STB), instantaneous heating water heater Secondary circuit return temperature sensor (F9) Fig.
  • Page 82 Maintenance Overview of internal components: Outdoor unit Danger Contact with live components can lead to seri- ous injury from electric current. Some compo- nents on PCBs remain live even after the power supply has been switched off. When working on the outdoor unit, isolate the ■...
  • Page 83 Maintenance Overview of internal components: Outdoor unit (cont.) Outdoor units, types 221.A04 to A08 Fig. 66 Reversible suction gas temperature sensor (T3) Air intake temperature sensor (T5) Schrader valve, low pressure side Heat exchanger (evaporator) Compressor Electronic expansion valve Schrader valve, high pressure side 4-way diverter valve Hot gas temperature sensor (T6) Secondary circuit air vent valve...
  • Page 84 Maintenance Overview of internal components: Outdoor unit (cont.) Outdoor units, types 221.A10 to A16 Fig. 67 Air intake temperature sensor (T5) Heat exchanger (evaporator)
  • Page 85 Maintenance Overview of internal components: Outdoor unit (cont.) Electronic expansion valve Hot gas temperature sensor (T6) 4-way diverter valve Compressor suction gas temperature sensor (T4) Secondary circuit flow temperature sensor Schrader valve, high pressure side upstream of instantaneous heating water heater Compressor (T1) Refrigerant receiver...
  • Page 86 Maintenance Checking the temperature sensors (cont.) Connection to the outdoor unit Temperature sensors are connected to the refrigerant circuit controller in the outdoor unit (see label in the outdoor unit): See page 83. Temperature sensor Test element Refrigerant circuit controller temperature sensor (T2) NTC 10 k Ω...
  • Page 87 Maintenance Checking the temperature sensors (cont.) Indoor unit: Viessmann NTC 10 k (blue marking) Ω / °C R / k / °C R / k / °C R / k / °C R / k / °C R / k / °C R / k...
  • Page 88 Maintenance Checking the temperature sensors (cont.) Indoor unit: Viessmann NTC 20 k (orange marking) Ω / °C R / k / °C R / k / °C R / k / °C R / k / °C R / k / °C R / k...
  • Page 89 Maintenance Checking the temperature sensors (cont.) Indoor unit: Viessmann Pt500A (green marking) / °C / °C R / / °C R / / °C R / / °C R / / °C R / ϑ Ω ϑ Ω ϑ Ω...
  • Page 90 Maintenance Checking the temperature sensors (cont.) Outdoor unit: Viessmann NTC 10 k (no marking) Ω / °C R / k / °C R / k / °C R / k / °C R / k / °C R / k / °C R / k...
  • Page 91 Maintenance Checking the fuses (cont.) 3. Check fuses. Replace if necessary. Danger Removing the fuse does not switch the power Danger circuit to zero volt. Contact with 'live' compo- Incorrect or improperly fitted fuses can lead nents can lead to serious injury from electric cur- to an increased risk of fire.
  • Page 92 Maintenance Checking the fuses (cont.)
  • Page 93 Indoor unit parts lists Overview of indoor unit assemblies The following details are required when ordering parts: ■ Serial no. (see type plate ■ Assembly (from this parts list) ■ Position number of the individual part within the assembly (from this parts list) Fig.
  • Page 94 Indoor unit parts lists Indoor unit casing 0005 0017 0004 0006 0018 0007 0008 0016 0011 0012 0012 0009 0001 0003 0013 0010 0002 0014 Fig. 70 Pos. Part 0001 Front panel, top 0002 Front panel, bottom...
  • Page 95 Indoor unit parts lists Indoor unit casing (cont.) Pos. Part 0003 Side panel, right 0004 Side panel, left 0005 Top panel 0006 Inner top panel 0007 Control unit panel fixing 0008 Pipe clip retaining bracket 0009 Control unit panel, bottom 0010 Logos 0011...
  • Page 96 Indoor unit parts lists Indoor unit electrical equipment 0036 0035 0041 0040 0042 0022 0039 0006 0005 0004 0038 0070 0003 0014 0002 0007 0001 0012 0017 0010 0044 0032 0011 0050 0037 0046 Fig. 71...
  • Page 97 Indoor unit parts lists Indoor unit electrical equipment (cont.) Pos. Part 0001 Programming unit 0002 Controller and sensor PCB with cover (CU401) 0003 Base support, controller and sensor PCB 0004 Main PCB with cover (MB761) 0005 Base support, main PCB 0006 Expansion PCB with cover (SA135) 0007...
  • Page 98 Indoor unit parts lists Hydraulics, indoor unit 0028 0026 0017 0010 0020 0029 0018 0031 0023 0023 0014 0018 0019 0001 0008 0016 0017 0018 0020 0016 0021 0023 0004 0031 0027 0023 0021 0018 0018 0024 0008 0023 0023 0021 0030 0018...
  • Page 99 Indoor unit parts lists Hydraulics, indoor unit (cont.) Pos. Part 0001 Hydraulic block 0003 High efficiency circulation pump with PWM control 0004 Safety valve 3 bar (0.3 MPa) 0005 Servomotor, 3-way diverter valve 0006 Drain hose safety valve 0007 Pressure gauge 0008 Valve insert, 3-way diverter valve 0010...
  • Page 100 Indoor unit parts lists Indoor unit DHW cylinder 0007 0013 0021 0009 0010 0014 0023 0021 0021 0008 0002 0021 0021 0021 0020 0021 0019 0008 0010 0021 0009 0023 0023 0006 0019 0020 0021 0014 0001 0021 0017 0021 0022 0022 0016...
  • Page 101 Indoor unit parts lists Indoor unit DHW cylinder (cont.) Pos. Part 0001 220 l DHW cylinder with internal indirect coil 0002 DHW line 0003 Cold water line 0004 Pipe bend, DHW cylinder flow 0005 DHW cylinder flow line 0006 DHW cylinder return line 0007 DHW circulation pipe 0008...
  • Page 102 Indoor unit parts lists Miscellaneous 0001 0004 0002 0005 0006 0003 0007 Fig. 74...
  • Page 103 Indoor unit parts lists Miscellaneous (cont.) Pos. Part 0001 Special grease 0002 Touch-up spray paint, white 0003 Touch-up paint stick, white 0004 Installation and service instructions 0005 Vitotronic 200, type WO1C operating instructions 0006 Connection and wiring diagram 0007 Vitotronic 200, type WO1C service instructions...
  • Page 104 Indoor unit parts lists Miscellaneous (cont.)
  • Page 105 Outdoor unit parts list 230 V~, types 221.A04 to A08 Overview of assemblies, outdoor unit 230 V~ The following details are required when ordering parts: ■ Serial no. (see type plate ■ Assembly (from this parts list) ■ Position number of the individual part within the assembly (from this parts list) Fig.
  • Page 106 Outdoor unit parts list 230 V~, types 221.A04 to A08 Outdoor unit casing 230 V~ 0006 0033 0031 0032 0001 0007 0034 0022 0018 0003 0014 0012 0009 0008 0024 0011 0010 0034 0019 0002 0026 0020 0005 0015 0021 0027 0004 0024...
  • Page 107 Outdoor unit parts list 230 V~, types 221.A04 to A08 Outdoor unit casing 230 V~ (cont.) Pos. Part 0001 Cover with gasket 0002 Side panel, right with sound insulation 0003 Side panel, left with sound insulation 0004 Front panel with sound insulation 0005 Fan grille 0006...
  • Page 108 Outdoor unit parts list 230 V~, types 221.A04 to A08 Outdoor unit refrigerant circuit 230 V~ 0015 0028 0033 0017 0018 0019 0020 0011 0034 0010 0012 0005 0015 0013 0015 0023 0055 0014 0018 0019 0019 0020 0020 0035 0053 0018 0017...
  • Page 109 Outdoor unit parts list 230 V~, types 221.A04 to A08 Outdoor unit refrigerant circuit 230 V~ (cont.) Pos. Part 0001 Compressor 0002 Refrigerant receiver 0003 Refrigerant receiver base fixing 0004 Oil separator 0005 4-way diverter valve 0006 Compressor base plate 0007 Anti-vibration mounts 0008...
  • Page 110 Outdoor unit parts list 230 V~, types 221.A04 to A08 Outdoor unit electrical equipment 230 V~ 0043 0084 0051 0008 0064 0009 0030 0067 0066 0022 0049 0070 0085 0063 Fig. 78...
  • Page 111 Outdoor unit parts list 230 V~, types 221.A04 to A08 Outdoor unit electrical equipment 230 V~ (cont.) Pos. Part 0008 EEV PCB (refrigerant circuit controller) 0009 Inverter 0022 230 V~ cable harness 0030 Mains terminals 0043 Connecting cable, compressor 0049 Temperature sensor cable harness 0051 Adaptor for safety high pressure switch...
  • Page 112 Outdoor unit parts list 230 V~, types 221.A04 to A08 Outdoor unit electrical equipment 230 V~ (cont.)
  • Page 113 Outdoor unit parts list 230 V~, types 221.A10 to .A16 Overview of assemblies, outdoor unit 230 V~ The following details are required when ordering parts: ■ Serial no. (see type plate ■ Assembly (from this parts list) ■ Position number of the individual part within the assembly (from this parts list) Fig.
  • Page 114 Outdoor unit parts list 230 V~, types 221.A10 to .A16 Outdoor unit casing 230 V~ 0034 0001 0032 0006 0033 0027 0018 0006 0031 0003 0028 0007 0029 0030 0022 0008 0025 0014 0011 0010 0023 0012 0024 0034 0019 0026 0011 0009...
  • Page 115 Outdoor unit parts list 230 V~, types 221.A10 to .A16 Outdoor unit casing 230 V~ (cont.) Pos. Part 0001 Cover with gasket 0002 Side panel, right with sound insulation 0003 Side panel, left with sound insulation 0004 Front panel with sound insulation 0005 Fan grille 0006...
  • Page 116 Outdoor unit parts list 230 V~, types 221.A10 to .A16 Outdoor unit refrigerant circuit 230 V~ 0020 0019 0018 0017 0016 0005 0027 0009 0011 0008 0010 0012 0033 0034 0015 0023 0015 0028 0017 0018 0019 0013 0020 0055 0018 0019 0014...
  • Page 117 Outdoor unit parts list 230 V~, types 221.A10 to .A16 Outdoor unit refrigerant circuit 230 V~ (cont.) Pos. Part 0001 Compressor 0002 Refrigerant receiver 0003 Refrigerant receiver base fixing 0004 Oil separator 0005 4-way diverter valve 0006 Compressor base plate 0007 Anti-vibration mounts 0008...
  • Page 118 Outdoor unit parts list 230 V~, types 221.A10 to .A16 Outdoor unit electrical equipment 230 V~ 0043 0084 0051 0008 0064 0009 0030 0066 0067 0022 0049 0085 0070 0063 Fig. 82...
  • Page 119 Outdoor unit parts list 230 V~, types 221.A10 to .A16 Outdoor unit electrical equipment 230 V~ (cont.) Pos. Part 0008 EEV PCB (refrigerant circuit controller) 0009 Inverter 0022 230 V~ cable harness 0030 Mains terminals 0043 Connecting cable, compressor 0049 Temperature sensor cable harness 0051 Adaptor for safety high pressure switch...
  • Page 120 Outdoor unit parts list 230 V~, types 221.A10 to .A16 Outdoor unit electrical equipment 230 V~ (cont.)
  • Page 121 Outdoor unit parts list 400 V~, types 221.A10 to .A16 Overview of assemblies, outdoor unit 400 V~ The following details are required when ordering parts: ■ Serial no. (see type plate ■ Assembly (from this parts list) ■ Position number of the individual part within the assembly (from this parts list) Fig.
  • Page 122 Outdoor unit parts list 400 V~, types 221.A10 to .A16 Outdoor unit casing 400 V~ 0001 0034 0028 0006 0029 0018 0003 0031 0030 0014 0007 0032 0024 0011 0006 0027 0033 0012 0034 0025 0010 0022 0016 0023 0011 0026 0020 0017...
  • Page 123 Outdoor unit parts list 400 V~, types 221.A10 to .A16 Outdoor unit casing 400 V~ (cont.) Pos. Part 0001 Cover with gasket 0002 Side panel, right with sound insulation 0003 Side panel, left with sound insulation 0004 Front panel with sound insulation 0005 Fan grille 0006...
  • Page 124 Outdoor unit parts list 400 V~, types 221.A10 to .A16 Outdoor unit refrigerant circuit 400 V~ 0020 0019 0018 0017 0016 0005 0027 0009 0011 0008 0010 0012 0033 0034 0015 0023 0015 0028 0017 0018 0019 0013 0020 0055 0018 0019 0014...
  • Page 125 Outdoor unit parts list 400 V~, types 221.A10 to .A16 Outdoor unit refrigerant circuit 400 V~ (cont.) Pos. Part 0001 Compressor 0002 Refrigerant receiver 0003 Refrigerant receiver base fixing 0004 Oil separator 0005 4-way diverter valve 0006 Compressor base plate 0007 Anti-vibration mounts 0008...
  • Page 126 Outdoor unit parts list 400 V~, types 221.A10 to .A16 Outdoor unit electrical equipment 400 V~ 0043 0084 0051 0008 0009 0064 0064 0064 0030 0066 0067 0022 0049 0070 0085 0063 Fig. 86...
  • Page 127 Outdoor unit parts list 400 V~, types 221.A10 to .A16 Outdoor unit electrical equipment 400 V~ (cont.) Pos. Part 0008 EEV PCB (refrigerant circuit controller) 0009 Inverter 0022 230 V~ cable harness 0030 Mains terminals 0043 Connecting cable, compressor 0049 Temperature sensor cable harness 0051 Adaptor for safety high pressure switch...
  • Page 128 Commissioning/service reports Hydraulic parameter report Settings and test values Set value Commissioning Maintenance/ service Checking external heating circuit pumps Circulation pump type Circulation pump stage Overflow valve setting Commissioning, primary circuit Air intake temperature °C ("Diagnosis" "System overview") Ó Air discharge temperature °C ("Diagnosis"...
  • Page 129 Commissioning/service reports Control parameter report (cont.) Parameter Code Delivered condition Commission- Maintenance/ service Temperature range input 0...10 V, cooling 700E Do not adjust. mode External extension 7010 System components for external change- 7011 over Operating status for external changeover 7012 Duration of external changeover 7013 Effect of external demand on heat pump/...
  • Page 130 Commissioning/service reports Control parameter report (cont.) Parameter Code Delivered condition Commission- Maintenance/ service ≙ Set DHW temperature 6000 500 ( 50 °C) ≙ Min. DHW temperature 6005 100 ( 10 °C) ≙ Max. DHW temperature 6006 600 ( 60 °C) ≙...
  • Page 131 Commissioning/service reports Control parameter report (cont.) Electric booster heater Parameter Code Delivered condition Commission- Maintenance/ service "Enable instantaneous heating water 7900 heater" "Enable electric heaters for DHW heat- 7901 ing" "Enable instant. heating water heater for 7902 central heating" "Start delay instantaneous heating water 7905 30 min heater"...
  • Page 132 Commissioning/service reports Control parameter report (cont.) Buffer cylinder Parameter Code Delivered condition Commission- Maintenance/ service Enable buffer cylinder/low loss header 7200 ≙ Temp in operating status fixed value for buf- 7202 500 ( 50 °C) fer cyl ≙ Hysteresis temperature heating buffer cylin- 7203 50 ( 5 K)
  • Page 133 Commissioning/service reports Control parameter report (cont.) Heating circuit 2 Parameter Code Factory setting Commission- Maintenance/ service ≙ Standard room temperature 3000 200 ( 20 °C) ≙ Reduced room temperature 3001 160 ( 16 °C) Remote control 3003 Room temperature control 3005 ≙...
  • Page 134 Commissioning/service reports Control parameter report (cont.) Cooling Parameter Code Delivered condition Commission- Maintenance/ service Cooling function 7100 Cooling circuit 7101 ≙ Set room temperature separate cooling cir- 7102 200 ( 20 °C) cuit ≙ Min. flow temperature cooling 7103 200 ( 20 °C) Influence room temperature hook-up cooling 7104...
  • Page 135 Commissioning/service reports Control parameter report (cont.) Parameter Code Delivered condition Commission- Maintenance/ service ≙ Control voltage matching 7D27 0 V) Fan for control voltage matching 7D28 Strategy, passive frost protection 7D2C Type of heat exchanger 7D2E Installation position 7D2F Function, external 230 V input, ventilation 7D3A Duration, bathroom vent.
  • Page 136 Commissioning/service reports Control parameter report (cont.) Parameter Code Delivered condition Commission- Maintenance/ service Intensive ventilation C10C Vitovent 200-W: ■ 75 % Vitovent 300-C: ■ 125 m Vitovent 300-W: ■ 225 m Background ventilation, second fan duct C189 15 % Reduced ventilation, second fan duct C18A 25 % Standard ventilation, second fan duct...
  • Page 137 Commissioning/service reports Control parameter report (cont.) Photovoltaics Parameter Code Delivered condition Commission- Maintenance/ service Enable own energy consumption PV 7E00 ≙ Prop. of external current 7E02 10 ( 10 %) Threshold for electrical power 7E04 Types 221.A04 to ■ 221.A08: ≙...
  • Page 138 Commissioning/service reports Control parameter report (cont.) Time Parameter Code Delivered condition Commission- Maintenance/ Service "Automatic changeover summertime - 7C00 wintertime" "Start summertime - month" 7C01 "Start summertime - week" 7C02 "Start summertime - day" 7C03 "Start wintertime - month" 7C04 "Start wintertime - week"...
  • Page 139 Specification Specification 230 V appliances Type AWOT-M-E/AWOT-M-E-AC 221.A04 221.A06 221.A08 221.A10 221.A13 221.A16 Heating performance data to EN 14511 (A2/W35) Rated heating output 2.61 3.11 4.04 5.01 5.92 6.47 Fan speed Power consumption 0.73 0.82 1.02 1.27 1.48 1.79 Coefficient of performance 3.57 3.78 3.96...
  • Page 140 Specification Specification (cont.) Type AWOT-M-E/AWOT-M-E-AC 221.A04 221.A06 221.A08 221.A10 221.A13 221.A16 Air intake temperature Cooling mode (type AWOT-M-E-AC only) Min. °C ■ Max. °C ■ Heating mode Min. °C – – – – – – ■ Max. °C ■ Heating water (secondary cir- cuit) Minimum flow rate 1400...
  • Page 141 Specification Specification (cont.) Type AWOT-M-E/AWOT-M-E-AC 221.A04 221.A06 221.A08 221.A10 221.A13 221.A16 Refrigerant circuit Refrigerant R410A R410A R410A R410A R410A R410A Refrigerant charge 1.40 1.40 1.40 2.40 2.40 2.40 ■ Global warming potential 2088 2088 2088 2088 2088 2088 ■ (GWP) equivalent ■...
  • Page 142 Specification Specification (cont.) Type AWOT-M-E/AWOT-M-E-AC 221.A04 221.A06 221.A08 221.A10 221.A13 221.A16 Secondary circuit connec- tions (with connection accesso- ries, female thread) Heating water flow ¼ ¼ ¼ ¼ ¼ ¼ Heating water return ¼ ¼ ¼ ¼ ¼ ¼ ¾ ¾...
  • Page 143 Specification Specification (cont.) Type AWOT-M-E/AWOT-M-E-AC 221.A04 221.A06 221.A08 221.A10 221.A13 221.A16 Sound power level to ErP Sound power level, outdoor unit dB(A) 400 V appliances Type AWOT-E/AWOT-E-AC 221.A10 221.A13 221.A16 Heating performance data to EN 14511 (A2/W35) Rated heating output 6.10 6.67 7.02...
  • Page 144 Specification Specification (cont.) Type AWOT-E/AWOT-E-AC 221.A10 221.A13 221.A16 Heating water (secondary circuit) Minimum flow rate 1400 1400 1400 Minimum volume in the heating system, can- 50/40 50/40 50/40 not be fitted with shut-off devices Max. external pressure drop (RFH) at mini- mbar mum flow rate Max.
  • Page 145 Specification Specification (cont.) Type AWOT-E/AWOT-E-AC 221.A10 221.A13 221.A16 Integral DHW cylinder Capacity Max. draw-off volume at DHW temperature 40 °C, storage temperature 53 °C and draw-off rate 10 l/min Performance factor N to DIN 4708 Max. draw-off rate at the specified perform- l/min 17.3 17.3...
  • Page 146 Specification Specification (cont.) Type AWOT-E/AWOT-E-AC 221.A10 221.A13 221.A16 Performance data as per EU Regulation no. 813/2013 (average climatic conditions) Low temperature applications (W35) Energy efficiency η ■ Rated heating output P 9.75 10.99 11.65 ■ rated Seasonal coefficient of performance (SCOP) 4.58 4.64 4.62...
  • Page 147 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 Final decommissioning and disposal Viessmann products can be recycled. Components...
  • Page 148 The product characteristics determined as system values for the product Vitocal 222-A (see technical guide) can be utilised to assess the energy consumption of heating and ventilation systems to DIN V 4701-10 specified...
  • Page 149 Keyword index Keyword index Connection Air discharge............14, 15 – Cooling circuit............29 Air intake.............. 14, 15 – Electric..............31 Air short circuit............13 – Electrical components..........31 Air vent valve, secondary circuit......83, 85 – Heating water side..........26, 27 Alignment..............29 –...
  • Page 150 Keyword index Keyword index (cont.) Electrical values Heat pump – Indoor unit............. 140, 144 – Checking for noise..........78 – Outdoor unit..........140, 144 – Closing.............. 56, 67 Electric booster heater..........74 – Opening..............59 Electric cables............17, 20 – Starting..............67 Electric heater............
  • Page 151 Keyword index Keyword index (cont.) Main MCB/fuse, switching on........67 Mains isolator..........53, 67, 82 Parameter group selection......... 69 Maintenance...............59 Parameters Max. cable length..........142, 145 – Cooling function............73 Maximum temperature limiter........37 – DHW circulation pump..........71 Minimum clearances – Electric booster heater..........74 –...
  • Page 152 Keyword index Keyword index (cont.) Product information............7 Siting................15 Programming unit, opening........79 – Between walls............13 Protective anode, testing..........62 – Conditions............... 12 Protective gloves............59 – Freestanding............12 Pumps............36, 81, 82 – Indoor unit............... 24 – In recesses..............13 Smart Grid..............77 Quick-action air vent valve.........
  • Page 153 Keyword index Keyword index (cont.) Weatherproofing............12 Wall mounting.............20 Weight................ 13 – Bracket set.............. 19 Wind direction............12 – Outdoor unit............19 Wind loads..............12 Warranty..............68 Water quality.............. 59...
  • Page 156 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 E-mail: info-uk@viessmann.com...

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