Vitocrossal 300
cu3a series 26 to 57
floor mounted, gas-fired condensing boiler with matrix gas burner and lambda pro control
for operation with natural gas and liquid propane gas
heating input 19 to 199 mbh
5.6 to 58 kw (56 pages)
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VIESMANN Service instructions for contractors Vitocrossal 300 Type CR3B, 787 to 1400 kW Gas condensing boiler VITOCROSSAL 300 Please keep safe. 5692910 GB 9/2018...
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Danger system. Hot surfaces and fluids can lead to burns or Replace faulty components only with genuine scalding. Viessmann spare parts. Before maintenance and service work, switch ■ OFF the appliance and let it cool down. ■ Never touch hot surfaces on the boiler, burner,...
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For replacements, use only original spare parts supplied or approved by Viessmann. Safety instructions for operating the system If you smell gas Condensate Danger...
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Index Index Information Symbols ....................Intended use ..................Product information ................Commissioning, inspec- Steps - commissioning, inspection and maintenance ......tion, maintenance Parts lists Ordering parts ..................19 Parts ...................... 20 Casing ....................22 Thermal insulation ................. 24 Miscellaneous ..................26 Water quality Water quality requirements ..............
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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...
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Information Product information Vitocrossal 300, type CR3B ■ Fuel: Natural gas E and natural gas LL ■ Rated heating output 787 kW and 1400 kW ■ Permissible operating pressure 6 bar (0.6 MPa)
Commissioning, inspection, maintenance Steps - commissioning, inspection and maintenance Commissioning steps Inspection steps Maintenance steps Page • 1. Checking the high limit safety cut-out setting..............• 2. Filling the heating system with water and venting............• 3. Fully opening the rotary damper in the flue outlet and securing it....... •...
Commissioning, inspection, maintenance Checking the high limit safety cut-out setting The high limit safety cut-out must not be set higher Control unit installation and service instructions than 110 °C. If required, set it to a maximum of 110 °C. Filling the heating system with water and venting Record the volume filled, water hardness and pH value Please note on page 30.
Commissioning, inspection, maintenance Minimising pulsation noise Whatever the make of boiler, burner or flue system, 1. Undo M 5 screw on lever of the damper gas-tight flue systems can still create pulsation noise. lock. A change of resonance may be affected by rotating the damper fitted into the flue outlet.
Commissioning, inspection, maintenance Separating the neutralising system from the heat exchanger module and connecting the drain hose 1. Separate hose or pipework to the neutralising system from siphon 2. Undo siphon from condensate drain 3. Clean condensate drain on the inside using a plastic brush.
Commissioning, inspection, maintenance Checking gaskets and thermal insulation… (cont.) Ø = Ø B -10 Fig. 3 Boiler door Burner plate Flame tube Thermal insulation block Thermal insulation mat Check the thermal insulation mat at the flame tube. The blue side of the thermal insulation mat has to face the combustion chamber.
Commissioning, inspection, maintenance Checking all connections and the sensor well on… (cont.) Fig. 4 1. Undo the fixing screws in top panels . Remove 4. Close the thermal insulation of the heat exchanger the panels. module. 2. Open the thermal insulation of the heat exchanger 5.
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.
Commissioning, inspection, maintenance Cleaning the sight glass in the boiler door Check gaskets and hose connection for leaks. Danger Leaks can result in a risk of poisoning through escaping flue gas. Check gaskets carefully. Fig. 5 Closing the boiler door 1.
Commissioning, inspection, maintenance Cleaning and reconnecting the condensate drain… (cont.) Fig. 6 1. Disconnect drain or cleaning hose 6. Clean the inside of the pipes of the condensate drain system and the neutralising system. 2. Clean condensate drain again from the inside using a plastic brush.
Commissioning, inspection, maintenance Checking the flue gas side tightness Fig. 7 1. Check flue gas collector and the boiler body for 2. If required, tighten flue gas collector with a tor- tightness. que of 7 Nm or replace the gasket. Note In full load operation, the gaskets can be checked with an inspection mirror.
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Commissioning, inspection, maintenance Operating and service documents (cont.) 2. File all parts lists, operating and service instruc- tions in the folder and hand this over to the system user. The installation instructions are no longer required after the installation and, therefore, do not need to be retained.
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Commissioning, inspection, maintenance Operating and service documents (cont.)
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Trim strip (1 roll = 10 m) 0302 Touch-up spray paint, Vitosilver, 150 ml can 0303 Touch-up paint stick, Vitosilver 0304 Vitocrossal 300 installation instructions 0305 Vitocrossal 300 service instructions 0308 Spring clip, short (10 pce) 0310 Flue system collar...
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Back panel, top 0224 Top panel, centre back 0225 Top panel, back 0226 Top panel, centre 0227 Top panel, left 0228 Top panel, centre, connector 0229 Top panel, right 0241 Corner rail, right 0306 Vitocrossal 300 logo 0307 Viessmann logo...
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Parts lists Thermal insulation Fig. 10 Type plate, either right or left Boiler control unit (see parts list in the service instructions of the boiler control unit) Burner cable (see parts list in the service instruc- tions of the boiler control unit)
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Parts lists Thermal insulation (cont.) Pos. Part 0019 Coding card 0200 Top front r.h. rail 0201 Top back r.h. rail 0204 Bottom front r.h. rail 0205 Bottom back r.h. rail 0211 Support plate 0212 Side panel, right front 0213 Side panel, control unit 0214 Side panel, centre 0215...
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Parts lists Miscellaneous (cont.) Pos. Part 0001 Flue gas cover with gasket and rotary damper 0002 Gasket set comprising 0003 Gasket DN 125 PN 6 0004 Gasket DN 100 PN 6, 1100/1280 kW only 0017 Stench trap...
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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...
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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.
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Commissioning/service reports Water quality Meter reading Fill and top-up water Total water volume Total hardness pH value Date Feedwater Boiler water Maintenance/service Commissioning Maintenance/service Maintenance/service Date: Commissioning Maintenance/service Maintenance/service Date: Commissioning Maintenance/service Maintenance/service Date: Commissioning Maintenance/service Maintenance/service Date:...
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Specification Specification Rated heating output = 50/30 °C 1100 1400 = 80/60 °C 1006 1280 Rated heat input 1038 1320 Product ID CE-0085AU0315 Product parameters (according to EnEV) Standard seasonal efficiency [to DIN] At heating system temperature 40/30 Up to 98 (H ) [gross cv] °C At heating system temperature 75/60...
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Final decommissioning and disposal Final decommissioning and disposal Viessmann products can be recycled. Components For decommissioning the system, isolate the system and substances from the system are not part of ordi- from the power supply and allow components to cool nary household waste.
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Manufacturer's certificate We, Viessmann Werke GmbH & Co. KG, D-35107 Allendorf, confirm that the product Vitocrossal 300, type CR3B, complies with the following conditions stipulated by the 1st German Immissions Order (BImSchV): ■ limits according to paragraph 6 (1).
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Keyword index Keyword index Boiler door Operating and service documents......16 – Closing..............14 Ordering parts............19 – Opening..............9 – Sight glass, cleaning..........14 Boiler water requirements.......... 28 Parts..............19, 20 Burner adjustment............15 Pressure maintaining system........13 Pressure switch function, checking......12 Product information............