Bosch Group 35CDi - Orpington Plumbers

1 35 CDi WALL MOUNTED COMBINATION BOILER FOR CENTRAL HEATINGAND MAINS FED DOMESTIC HOT WATERINSTALLATION ANDSERVICING INSTRUCTIONSThis appliance is for use with Natural Gas or LPG (Cat II 2H3P).GC NUMBER 47 311 39 ( ) GC NUMBER 47 311 40 ( )CE 97/0086 APPLIANCE OUTPUTSN atural Gas LPG (Propane) Domestic Central DomesticCentralHot Water Heating Hot Water HeatingMinimum kW kW kWMaximum kW kW kWIMPORTANT.

2 THESE INSTRUCTIONS APPLY IN THE UK ONLYAND MUST BE LEFT WITH THE USER OR AT THE GAS METERRead the instructions before starting work - they have been written tomake the installation easier and prevent Gas Safety (Installation & Use) Regulations 1994 (Amended1996) : It is the law that all gas appliances are installed by acompetent person in accordance with the above to install appliances correctly could lead to prosecution. Itis in your interest, and that of safety, to ensure compliance withthe The manufacturers notes must not be taken, in any way, asoverriding statutory The compliance with a British Standard or European Normdoes not, of itself, confer immunity from legal The installation of the appliance must be in accordance withthe relevant requirements of the Gas Safety Regulations, currentIEE Regulations, Building Regulations, Building Standards(Scotland)

3 And local water The installation should follow the recommendations of thefollowing British Standards unless otherwise indicated:BS6798 - Specification for the installation of gas fired hot waterboilers of rated input not exceeding 60kW (Gross).BS5449 - Central heating for domestic :1 - Installation of gas hot water supplies for :1 - Flues and ventilation for gas appliances of rated inputnot exceeding 60kW (Gross): :2 - Flues and ventilation for gas appliances of rated inputnot greater than 60kW (Gross): Air 5482 - Domestic butane and propane gas burning installations -permanent - Installation of low pressure gas pipework installationsupto 28mm (R1).

4 BS6700 - Domestic water supply in - Water treatment in domestic heating To ensure that the installation will perform to the higheststandards, the system and components should conform to anyother relevant The appliance and/or components conform, whereapplicable, with the Essential Requirements of the Gas ApplianceDirective, the Boiler Efficiency Directive, the EMC Directive and theLow Voltage In accordance with the requirements of COSSH the appliancedoes not contain any substances which are harmful to Product Liability regulations indicate that, in certaincircumstances, the installer can be held responsible, not only formistakes on his part but also for damage resulting from the use offaulty materials.

5 We advise that, to avoid any risk, only qualityapproved branded fittings are LPG Installation. The appliance shall not be installed in aroom or internal space below ground level when it is intended foruse with LPG. This does not preclude the installation into roomswhich are basements with respect to one side of the building butopen to the ground on the opposite The advice and instructions given in this document covers, asfar as possible, the forseeable situations which may arise.

6 ContactWorcester Heat Systems Technical Department, Telephone: 0990266241, for advice on specific The appliance is set to give a maximum output to the domestic hot water and 25kW to the heatingsystem. The hot water flow rate is limited to a nominal at a maximum temperature rise of 40 The sanitary water section of the appliance is suitable forwater mains pressures of upto Conversion kits are available to convert the appliance fromNatural Gas to Propane operation and vice versa.

7 The kits includeconversion Electrical 230V ~50Hz. Load 180 watts. External fuse 3A, Internalfuses F1 - 2A, F2 - (20mm). Gas The appliance requires /h of natural gas (G20) /h of propane (G31). The meter or regulator should deliver 20mbar (G20) or37mbar (G31) at the appliance, which is equivalent to or at the gas valve inlet pressure test The appliance is suitable for indoor installation The appliance is for use with a sealed system The clearances specified for servicing must not be Do not place anything on top of the appliance.

8 It is a room sealed appliance and a separate combustionair supply is not required in any room or compartment in whichthe appliance is If the appliance is fitted in a cupboard or a compartment isbuilt around it after installation, then the structure must conformwith the requirements of BS6798. However, because of the lowcasing losses, there is no need for the cooling ventilationopenings in the compartment. The spaces specified for servicingmust be There is space for the service pipes to pass at the back ofthe The flue can be to the right, left or The flue terminal, on the outside wall, must not beobstructed or A terminal guard, Type K2 - GC 393 553, is available fromTower Flue Components, Vale Rise, Tonbridge TN9 An internal flue fitting kit is available.

9 Fitting instructionsare given in Section Introduction1. Installation Page 811. Installation .. Page .. Page information .. Page and Servicing .. Page of Parts .. Page Parts List .. Page Flow Page Finding .. Page Regulations .. Page Page Data .. Page the Appliance .. Page Terminal Position .. Page Supply .. Page System .. Page Hot Water .. Page supply .. Page 8 Contents332. 6. Control knob for switching the appliance On or Control knobs for adjusting the CH or DHW CH control knob switches the CH off and A programmable room thermostat or a facia mountedprogrammer or clock is A radio frequency room thermostat is A mains voltage room thermostat and/or an externallymounted mains voltage programmer may be connected to All dirt mustbe flushed from the system before connectingthe The connections in the system must withstand a pressureof upto

10 Radiator valves must conform to BS2767:10 Table 3 gives the pump head available for the system andthe required temperature A drain cock must be fitted to the lowest point of An air vent should be fitted to the highest point of Showers, Bidets, Taps and Mixing All taps and mixing valves must be suitable for theavailable mains pressure and temperatures upto 65 C. It may benecessary to fit a pressure reducing Hot and cold mains fed water can be supplied to overrimbidets but is subject to local water company The flow of water from individual outlets varies on allmains fed systems that are not fitted with flow balancing If a pressure equalising valve is fitted then the domestichot water temperature should be set to Thermostatically controlled shower valves give extracomfort and The appliance must not be operated with the inner