Table of Contents
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Table of Contents
Related Manuals for VOKERA Vision 25C
Summary of Contents for VOKERA Vision 25C
- Page 1 Vision C High efficiency combi boiler Users Instructions Installation & Servicing Instructions THESE INSTRUCTIONS TO BE RETAINED BY USER Vokèra is a licensed member of the Benchmark scheme which aims to improve the standards of installation and commissioning of domestic hot water systems in the UK.
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Page 2: Table Of Contents
Users instructions Things you should know Page Installation Page Gas appliances Delivery Electrical supply Contents Guarantee registration card Unpacking Appliance Log Book (UK only) Preparation for mounting the appliance How does it work? Fitting the flue Dimensions Connecting the gas & water Clearances required Electrical connections Frost protection system... -
Page 3: Users Instructions
1.9 APPLIANCE STATUS INDICATORS 1.6 DIMENSIONS Your boiler is equipped with a large LCD display that indicates the appliance operating status. Vision 25C - 30C HEIGHT 715 mm WIDTH 405 mm... -
Page 4: Pressure Gauge
Fig. 1 DIGITAL WEEKLY CLOCK AND BOILER STATUS DISPLAY HOT WATER TEMPERATURE CLOCK SETTING SELECTOR PRESSURE GAUGE BUTTONS MODE SELECTOR SWITCH HEATING TEMPERATURE SELECTOR HOT WATER TEMPERATURE SELECTOR Move the selector clockwise to increase the hot water outlet temperature, or counter-clockwise to reduce the temperature PRESSURE GAUGE Ensure the system pressure is set correctly (minimum 0.5-bar) MODE SELECTOR SWITCH/HEATING TEMPERATURE SELECTOR... - Page 5 DIGITAL WEEKLY CLOCK Fig. 2 Symbol/Icon Description/Function Button/Icon Main Function Secondary Function Used to show current day of week Used to set/adjust (flashing) time of day, and day of week Displayed when the ADVANCE-ON fun- ction is active Use to “advance” Use to increase values when Displayed when the ADVANCE-OFF fun- the heating to an...
- Page 6 BUILT-IN CLOCK 1.4 CHANGING THE HEATING PATTERN The Vision 25C & 30C incorporate a built-in digital clock and The built-in clock is pre-programmed with a default heating multi-inf mative LCD display. pattern (see Fig.1), however this can be changed to a user defined heating pattern.
- Page 7 NOTE, when the ADVANCE OFF function is enabled, the hea- ting will remain OFF until the next scheduled ON period. 1.6 MODE OF OPERATION To change the mode of operation (AUTO to MAN) momenta- rily press the button; the display will show the following: •...
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Page 8: Getting Started Page
2. GETTING STARTED 2.1 BEFORE SWITCHING ON appliance reaches the CH set temperature, the burner will go Before switching the appliance on, please familiarise yourself off for a minimum period of approximately 3 minutes. with: When the programmer/time clock or external thermostats - how to isolate the appliance from the gas, water, and electricity heating request has been satisfied, the appliance will switch supplies;... -
Page 9: What If
FAULT CODES ALARM CODE CAUSE ALARM TYPE ACTION AUTOSTOP Final Call engineer CALL FOR SERVICE Temporary then Call engineer Final Ignition failure, flame not sensed, Final Reset, check appliance operation internal fault Limit thermostat fault Final Reset, check appliance operation Fan tacho signal fault Final Reset check appliance operation,... -
Page 10: Installation And Servicing Instructions
INSTALLATION AND SERVICING INSTRUCTIONS INTRODUCTION The Vision is approved for use with C13 & C33 type flue ap- The Vision comprises a range of high-efficiency combination plications. boilers with outputs to DHW of 25kW and 29kW respectively. These appliances are designed for use with a sealed system These appliances –... -
Page 11: Principle Components
SECTION 1 - DESIGN PRINCIPLES AND OPERATING SEQUENCE 1.1 PRINCIPLE COMPONENTS 1.5 SAFETY DEVICES • A fully integrated electronic control board featuring electronic temperature control, anti-cycle control, pump over-run, self- When the appliance is in use, safe operation is ensured by: diagnostic fault indicator, full air/gas modulation •... -
Page 12: Central Heating
SECTION 2 - TECHNICAL DATA 2.1 Central Heating Vision 25C Vision 30C Heat input (kW) 20.00 25.00 Maximum heat output (kW) 60/80°C 19.50 24.45 Minimum heat output (kW) 60/80°C 4.91 5.90 Maximum heat output (kW) 30/50°C 20.84 26.23 Minimum heat output (kW) 30/50°C 5.36... -
Page 13: Efficiency
Below an opening or window on a pitched roof 2000 mm From a vertical terminal to an adjacent opening (window, air-brick, etc.) (call Vokera technical for advice) From a vertical terminal to an adjacent vertical terminal 300 mm (only if both terminals are the same hight) -
Page 14: Related Documents
SECTION 3 - GENERAL REQUIREMENTS (UK) This appliance must be installed by a competent person in ac- BS 5440 Part 1, when the terminal is 0.5 metres (or less) below cordance with the Gas Safety (Installation & Use) Regulations. plastic guttering or 1 metre (or less) below painted eaves. 3.1 RELATED DOCUMENTS 3.5 AIR SUPPLY The installation of this boiler must be in accordance with the... -
Page 15: Electrical Supply
3.6.8 FREQUENT FILLING 3.11 SHOWERS Frequent filling or venting of the system may be indicative If the appliance is intended for use with a shower, the shower of a leak. Care should be taken during the installation of the must be thermostatically controlled and be suitable for use with appliance to ensure all aspects of the system are capable of a combination boiler. -
Page 16: Air Supply
3A.7 ELECTRICAL SUPPLY the terminal must be protected by a guard of durable material. The guard must be fitted centrally over the terminal. Refer to The appliance is supplied for operation on 230V @ 50Hz electri- I.S. 813, when the terminal is 0.5 metres (or less) below plastic cal supply;... -
Page 17: Delivery
SECTION 4 - INSTALLATION 4.1 DELIVERY 29450127 2000m extension 2000mm 29450128 Telescopic extension 350/730mm Due to the weight of the appliance it may be necessary for Wall bracket pack (5) 208mm two people to lift and attach the appliance to its mounting. The appliance is contained within a heavy-duty cardboard carton. - Page 18 4.5.1.2 FITTING THE REAR FLUE (fig. 15) (rear flue outlet only) Using the template provided, mark and drill a 125mm hole for the passage of the flue pipe. The hole should be drilled LEVEL to ensure any condense fluid that forms, is allowed to drain back to the appliance.
- Page 19 IMPORTANT 4.5.2 CONCENTRIC VERTICAL FLUE The vertical flue terminal is 1.0 metre in length and cannot be The appliance can be used with either the Vokèra condensing cut; therefore it may be necessary to adjust the height of the 60/100mm concentric flue system or the optional 80/125mm appliance to suit or use a suitable extension.
- Page 20 INSTALLATION OF TWIN ADAPTOR KIT (fig. 19 & 20) NOTE • Insert the exhaust connection manifold (A) onto the appliance Seal the flue terminal assembly to the wall using cement or a flue outlet. suitable alternative that will provide satisfactory weatherproof- • Remove the blanking plate (located to the left of the appliance ing.
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Page 21: Connecting The Gas & Water
4.6 CONNECTING THE GAS AND WATER Hot water outlet Fig. 23 The appliance is supplied with an accessory pack that includes cock service valves. The service valves are of the compression type. Cold water inlet The accessory pack contains sealing washers’ etc, for use with stopcock the service valves. -
Page 22: Gas Supply Installation
SECTION 5 - COMMISSIONING 5.1 GAS SUPPLY INSTALLATION • ensure the 3 AMP fuse – supplied with the appliance – has been fitted; Inspect the entire installation including the gas meter, test for • ensure the system has been filled, vented and the pressure tightness and purge. -
Page 23: Regulating The Central Heating System
5.11.2 FLOW-RATE RESTRICTOR the appliance must be serviced annually by a competent person. The boiler is supplied with the following flow restrictor. Vision 25C: 8 - litres flow restrictor IMPORTANT Vision 30C: 10 - litres flow restrictor To validate the appliance warranty, it’s necessary to register the appliance details with us. -
Page 24: Pump Assembly
via the drain valve. Ensure some water absorbent cloths are available to catch any residual water that may drip from the appliance or removed component. Undertake a complete com- missioning check as detailed in section 5, after replacing any component. ALWAYS TEST FOR GAS TIGHTNESS IF ANY GAS CARRYING COMPONENTS HAVE BEEN REMOVED OR DISTURBED. -
Page 25: Gas Valve
from the PCB, locate and remove the PCB securing screws, remove the required PCB. Replace in the reverse order ensur- ing that the position of the 2 control knobs are correctly aligned with the respective potentiometers on the PCB. Ensure that the correct jumper tag configuration has been respected. -
Page 26: Main Heat Exchanger
6.16 MAIN HEAT EXCHANGER (fig. 36) Carry out component removal procedure as described in 6.4. Remove the air chamber front cover. Locate and remove the gas pipe locking pin (A1) and swing/rotate the gas pipe away from the fan assembly (B1), (if necessary unscrew the gas pipe from the gas valve G1). -
Page 27: Flue Collector Removal
6.20 FLUE COLLECTOR REMOVAL (fig. 40) Carry out component removal procedure as described in 6.4. Remove the air chamber front cover. Remove the heat exchang- er as per 6.16. Locate and remove the screw (Y1) that secures the flue gas analysis test point cover (Z1). Disconnect the flues thermistor wiring connections. -
Page 28: Checking Appliance Operation
SECTION 7 - CHECKS, ADJUSTMENTS AND FAULT FINDING 7.1 CHECKING APPLIANCE OPERATION temperature will fall whereby fan speed will increase relative to the output required. When the boiler has reached the set point When carrying out any repairs or servicing to the appliance, (+ hysterisis), the burner will switch off. -
Page 29: Combustion Analysis Test
7.3.1 CO FUNCTION SETTINGS Locate the CO button (see 7.3) Select the main selector switch in position FUNCTIONS ACTION ON THE BUTTON DISPLAY combustion analysis mode press once = burner running at maximum heating gas valve maximun setting press twice = burner running at maximum DHW gas valve minimum setting press three time = burner running at minimum NOTE... -
Page 30: Fault Finding
COMPONENT VALUES & CHARACTERIS- the fault. A visual inspection of components may also assist in locating the fault. TICS 7.7.3 POLARITY CHECK COMPONENT VALUE With the appliance connected to the electrical supply and us- 230Vac ing a suitable multimeter, carry out the following voltage tests: Pump 230Vac • connect test leads between the Live &... -
Page 31: Adjustments
GAS (G20) (G31) - turn the heating water temperature selector to set the re- quired value Vision 25C heating - DHW 49 - 61 49 - 61 - press the CO button and then skip to the calibration of the next parameter. - Page 32 Vision 25C The boiler is supplied with the adjustments shown in the table. Depending on plant engineering requirements or regional flue gas emission limits it is, however, possible to modify this value, referring to the graphs below. HTG curve (Qnheating) COs.a.
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Page 33: External Wiring
SECTION 8 - WIRING DIAGRAMS 8.1 EXTERNAL WIRING The appliance comes with a factory fitted (TA) link to allow NOTE: Use contacts free of voltage basic operation of the boiler via the mode selector switch. If external controls are to be added to the system, they must be Room Thermostat (24 Vdc) connected to the appliance as shown in the following diagrams. - Page 34 FUNCTIONAL DIAGRAM Fig. 46...
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Page 35: Related Documents
BS 5546 INSTALLATION OF GAS HOT WATER SUPPLIES FOR DOMESTIC PURPOSES BS 6798 INSTALLATION OF BOILERS OF RATED NOT EXCEEDING 60kW 10.2 TECHNICAL DATA Gas Pressures Vision 25C Vision 29C Inlet pressure 37.0 mbar 37.0 mbar Heating maximum gas rate (kg/hr) 1.55... - Page 36 10.6.2 GAS VALVE MAXIMUM SETTING Set the CO button at maximum (see 10.3.1), once the maximum is obtained check that it corresponds with the appropriate CO value (Maximum) for the respective appliance. If the CO read- ing is correct, proceed to gas valve minimum setting (10.7.2). However, if the CO reading is incorrect, the maximum gas pressure must be adjusted as follows:...
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Page 37: Benchmark
GAS BOILER SYSTEM COMMISSIONING CHECKLIST This Commissioning Checklist is to be completed in full by the competent person who commissioned the boiler as a means of demonstrating compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference. Failure to install and commission this equipment to the manufacturer’s instructions may invalidate the warranty but does not affect statutory rights. -
Page 38: Service Record
SERVICE RECORD It is recommended that your heating system is serviced regularly and that the appropriate Service Record is completed. Service Provider Before completing the appropriate Service Record below, please ensure you have carried out the service as described in the manufacturer’s instructions. - Page 40 Registered address: Vokèra Ltd Borderlake House Unit 7 Riverside Industrial Estate London Colney Herts AL2 1HG enquiries@vokera.co.uk www.vokera.co.uk www.vokera.ie Sales, General Enquires T 0844 391 0999 F 0844 391 0998 Vokèra Ireland West Court, Callan Co Kilkenny T 056 7755057 F 056 7755060 Vokèra Limited reserve the right to change...
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