Viessmann Vitoradial 300-T Service Instructions Manual
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Viessmann Vitoradial 300-T Service Instructions Manual

Condensing boiler with heat exchanger
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VIESMANN
Service instructions
for contractors
Vitoradial 300-T
Type VR3, 101 to 335 kW
Condensing boiler with heat exchanger
VITORADIAL 300-T
Please keep safe.
5692820 GB
4/2021

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Summary of Contents for Viessmann Vitoradial 300-T

  • Page 1 VIESMANN Service instructions for contractors Vitoradial 300-T Type VR3, 101 to 335 kW Condensing boiler with heat exchanger VITORADIAL 300-T Please keep safe. 5692820 GB 4/2021...
  • Page 2 Safety instructions Safety instructions Please follow these safety instruc- tions closely to prevent accidents and material losses. Safety instructions explained Danger Note This symbol warns against the risk Details identified by the word "Note" of injury. contain additional information. Please note This symbol warns against the risk of material losses and environmen- tal pollution.
  • Page 3 Viessmann. water pipes to discharge static loads. Repair work Please note Repairing components that fulfil a safety function can compromise the safe operation of the system. Replace faulty components only with genuine Viessmann spare parts.
  • Page 4 Safety instructions Safety instructions (cont.) Safety instructions for operating the system If you smell gas Condensate Danger Danger Escaping gas can lead to explo- Contact with condensate can be sions which may result in serious harmful to health. injury. Never let condensate touch your Do not smoke.
  • Page 5 Safety instructions Safety instructions (cont.) Danger The simultaneous operation of the boiler and appliances that exhausts air to the outside can result in life threatening poisoning due to a reverse flow of flue gas. Fit an interlock circuit or take suita- ble steps to ensure an adequate supply of combustion air.
  • Page 6 Index Index Information Symbols ....................Intended use ..................Product information ................System examples .................. Commissioning, inspec- Steps - commissioning, inspection and maintenance ......tion, maintenance Fuel oil Ordering heating oil ................22 Fuel oil additives ................. 22 ■ Combustion improvers ................ 22 ■...
  • Page 7 Information Symbols The steps in connection with commissioning, inspec- Symbol Meaning tion and maintenance are found in the "Commission- Reference to other document containing ing, inspection and maintenance" section and identified further information as follows: Step in a diagram: Symbol Meaning The numbers correspond to the order in Steps required during commissioning...
  • Page 8 Information Product information Vitoradial 300-T, type VR3 ■ Fuels: Fuel oil and natural gas ■ Permissible operating pressure 4 bar (0.4 MPa) ■ Rated heating output 111 to 335 kW System examples Available system examples: See www.viessmann-schemes.com.

  • Page 9: Table Of Contents

    Commissioning, inspection, maintenance Steps - commissioning, inspection and maintenance Commissioning steps Inspection steps Maintenance steps Page • 1. Settings at the boiler control unit..................10 • • • 2. Check the connections to the neutralising system. Filling with neutralising agent..10 •...

  • Page 10: Settings At The Boiler Control Unit

    Commissioning, inspection, maintenance Settings at the boiler control unit Make the settings according to the information in chap- To keep the burner cycle ratio as low as possible, set a ter "Additional information, coding" in the control unit variable switching hysteresis. service instructions.

  • Page 11: Checking The Burner Adjustment

    Commissioning, inspection, maintenance Commissioning the system (cont.) 12. Once the flow temperature has been reached, 14. Check the boiler door and cleaning cover after successively switch on the heat consumers. approx. 50 hours run. Tighten the screws. Switch the burner over to automatic mode. Danger Please note Opening the connections on the heating water...

  • Page 12: Opening The Boiler Door

    Commissioning, inspection, maintenance Opening the boiler door Fig. 1 Cleaning the internal pipes and heating surface Fig. 2 1. Remove internal pipes using internal pipe 3. Remove combustion residues from the flue pipe and the flue outlet through the cleaning aperture in extractor the flue outlet using a vacuum cleaner.

  • Page 13: Checking The Thermal Insulation Components On The Boiler Door

    Commissioning, inspection, maintenance Checking the gaskets and packing cords on the flue gas side Checking the thermal insulation components on the boiler door Danger Fibre dust can be produced if working with high temperature insulation materials that contain zir- conium or aluminium silicate ceramic fibres. This fibre dust can be harmful to health.

  • Page 14: Fitting The Boiler Door

    Commissioning, inspection, maintenance Fitting the boiler door Fig. 4 Close the door: Tighten screws crosswise to 25 Nm. Danger Escaping gas leads to a risk of explosion. Check the boiler door for tightness. Checking connections and sensor well on the heating water side for tight- ness Checking the function of the safety equipment Check the safety valves, water level limiter and pres-...

  • Page 15: Checking The Temperature Controller Setting If A Building Management System Is Used (Dcc System)

    Commissioning, inspection, maintenance Checking the temperature controller setting if a building management system is used (DCC system) Please note Shutting down from full load can result in high material stress and material damage. If a system with a higher ranking building man- agement system takes over the temperature control of the boiler, adjust the settings at the temperature controller TR.

  • Page 16: Checking The Heat Exchanger Gasket

    Commissioning, inspection, maintenance Checking the firm seating of electrical plug-in connections and cable grommets Checking the heat exchanger gasket Removing the cover panel 4,8 x 9,5 Fig. 5 Cover plate...
  • Page 17 Commissioning, inspection, maintenance Checking the heat exchanger gasket (cont.) Removing the top panels Fig. 6 Removing the back panel 3,9 x 9,5 Fig. 7 Back panel Removing the heat exchanger cover Fig. 8 1. Cut fabric lining around the return pipe.

  • Page 18: Cleaning The Flue Outlet And Heat Exchanger

    Commissioning, inspection, maintenance Checking the heat exchanger gasket (cont.) 2. Remove retaining springs 4. Remove gasket . Remove fabric lin- and clean the sealing face. ing. Assembly 3. Remove heat exchanger cover by undoing the 4 hexagon nuts. Assemble in reverse order. Tighten cleaning cover to 5 Nm.

  • Page 19: Checking The Water Quality

    Commissioning, inspection, maintenance Checking the water quality Observe the instructions in chapter "Water quality Enter the amount of top-up water and the total hard- requirements" on page 23. ness of the feed and boiler water into the table in the appendix on page 25.

  • Page 20: Restarting The System

    Commissioning, inspection, maintenance Restarting the system Adjusting the burner Burner service instructions or separate docu- Rated combus- Pressure drop on the hot gas mentation by the burner manufacturer tion heating out- side put Q Adjust the maximum oil throughput of the burner to the mbar rated boiler heating output.

  • Page 21: Instructing The System User

    Commissioning, inspection, maintenance Adjusting the burner (cont.) Operation with burner load 40 % and < 60 % ≥ The minimum system temperatures (flow/return) are 50/35 °C for oil operation and 60/45 °C for gas opera- tion. Operation with burner load < 40 % The minimum system temperatures (flow/return) are 55/45 °C for oil operation and 65/55 °C for gas opera- tion.
  • Page 22 Note ing fuel oil quality. Your heating contractor or the burner manufacturer Depending on the burner selected, the Vitoradial 300-T can answer any questions on the use of fuel oil. is suitable for the combustion of commercially availa- ble EL fuel oils to DIN 51603-1. Also for fuel oil DIN 51603-6-EL A Bio 10 (low sulphur blend with up 10 % bio-components).
  • Page 23 Water quality Water quality requirements Note Observing the following requirements is necessary to safeguard your warranty rights. The warranty excludes damage due to corrosion and scaling. Prevention of damage due to scaling Prevent excessive scale build-up (calcium carbonate) on the heating surfaces. For heating systems with operating temperatures up to 100 °C, VDI Guideline 2035 Part 1 "Prevention of damage in water heating installations - Scale formation in domestic hot water...
  • Page 24 Water quality Water quality requirements (cont.) Failure to observe the requirements of VDI Guideline This measure must be carried out by a qualified con- 2035 can result in damaging limescale deposits. In tractor. Inspect the heating system for possible dam- such cases, the service life of the installed boilers will, age prior to returning it into use.
  • Page 25 Commissioning/service reports Water quality Meter Fill and top- Total water Total hardness pH value Water treatment Date reading up water volume Feedwater Boiler wa- Medium Metering volume Maintenance/service Commissioning Maintenance/service Maintenance/service Date: Maintenance/service Maintenance/service Maintenance/service Date: Maintenance/service Maintenance/service Maintenance/service Date:...
  • Page 26 Commissioning/service reports Maintenance/service (cont.) Maintenance/service Maintenance/service Maintenance/service Date: Maintenance/service Maintenance/service Maintenance/service Date:...
  • Page 27 Specification Specification Rated heating output = 50/30 °C = 80/60 °C Rated heat input CE designation CE-0035BU104 Permissible flow temperature °C (= safety temperature) Permiss. operating pressure Weight boiler body Total weight Boiler incl. thermal insulation, burner and boiler control unit Total weight —...
  • Page 28 Decommissioning and disposal Final decommissioning and disposal Viessmann products can be recycled. Components For decommissioning, isolate the system from the and substances from the system are not part of ordi- power supply and allow components to cool down nary domestic waste.
  • Page 29 Manufacturer's certificate Vitoradial 300, type VR3 We, Viessmann Werke GmbH & Co. KG, D-35107 Allendorf, confirm that this product meets the following required conditions: In accordance with the 1st German Immissions Ordinance (BImSchV) limits according to paragraph 6 (1) ■...
  • Page 30 Keyword index Keyword index Additives, fuel oil............22 Maintenance/service report........25 Manufacturer's certificate........... 29 Mixer, checking for ease of operation and tightness.. 19 Biofuels..............22 Boiler door – Fitting..............14 Neutralising system............10 – Opening..............12 Boiler water requirements.......... 23 Burner adjustment............20 Operating and service documents......21 Operation, partial load..........20 Operation with burner load.........20 Combustion improvers..........
  • Page 32 Viessmann Climate Solutions SE Viessmann Limited 35108 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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