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Summary of Contents for andrews NEOflo SC25/200
- Page 1 March 2010 NEOflo Condensing Water Heaters Operating, Installation and Servicing Instructions Working towards a cleaner future...
- Page 2 Serial No: WARNING: If the information in these instructions are not followed exactly, a fire or explosion may result causing property damage, personal injury or death. Do not store or use gasoline or other flammable vapours and liquids in the vicinity of this or any other appliance.
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Page 3: Technical Data
TECHNICAL DATA Gas Category, Type and Supply pressure G20 @ 20 mbar Permitted Flue Systems B23, C13, C33 Flue Connection 80 mm Maximum Flue Equivalent Lengths Concentric 80/125 mm 20m FEL Twin (combined length) 80 mm 40m FEL Maximum Flue Temperature 75 °C Gross Input 26.3 kW... - Page 4 These instructions apply in the UK and must be followed except for any statutory obligation. All installation and service work on the Andrews Water Heater must be carried out by a competent person, failure to install correctly could lead to prosecution.
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Page 5: Table Of Contents
List of Figures & Tables Page CONTENTS Section Page Fig 1.1 User Control TECHNICAL DATA Inside cover Fig 2.1 General Dimensions Fig 3.1 Open Vent Example User Instructions Fig 3.2 Re-Circulation Design GENERAL & SAFETY INFORMATION 5 Fig 3.3 De-Stratification Design Gas Safety Standards Fig 4.1 Unvented Design... -
Page 6: User Instructions
NEOflo USER'S OPERATING INSTRUCTIONS FOR YOUR SAFETY - READ BEFORE OPERATING This appliance is equipped with an ignition device WARNING which automatically lights the burner. * Do not remove or adjust any component part of this water heater; contact the installer. BEFORE OPERATING after a prolonged time off, * If this heater developes a fault, such as hot smell all around the appliance area for gas. - Page 7 De-Stratification If your installation has been equipped with a de- stratification pump wired from the Heater, a Pump symbol will show on the display when it is running. Other symbols If the wrong buttons are pressed it is possible that an engineering mode might be accidentally en- tered and different symbols will be displayed.
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Page 8: General & Safety Information
GENERAL & SAFETY INFORMATION BS 7206: Specification for unvented hot water The NEOflo range features a stainless steel tank storage units and packages. with a stainless steel integrated heat exchanger and a fully automatic electronic control. It also The following could be relevant dependant provides mains outputs for Standby, Running and upon the installation: Lockout, for remote use. -
Page 9: Cold Water Supply Systems
(20ºC to 45ºC) and the accumulation of debris, scale and corrosion in the base of tanks and calorifiers. Andrews Water Heaters has commissioned an independent evaluation of their products to investi- gate their resistance to build-up of Legionella bacteria. - Page 10 GENERAL DIMENSIONS Fig 2.1 Height Depth Service Clearance all models mm Left & Right Above In Front Model Width Depth Height 25/200 1570 25/300 1545 25/400 1900 NEOflo Water Heater 11/08/09...
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Page 11: Installation Of Heater
The cold water feed cistern must have an actual Water Quality and Treatment capacity greater than the hourly recovery rate of the When installing an Andrews Water Heaters in hard heater or heaters to which it is fitted, the minimum water areas we would recommend that a water actual capacity allowed for a feed cistern being 227 treatment specialist is consulted. - Page 12 NEOflo OPEN VENT EXAMPLE Service Valve Outlets Fig 3.1 Drain NEOflo SECONDARY RETURN DESIGN NEOflo DE-STRATIFICATION DESIGN 1. Pressure Reducing Valve 2. Non Return Valve 3. Expansion Vessel Pump 4. Pressure Relief Valve 5. Temp & Pressure Relief Valve Pump 6.
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Page 13: Unvented Water Supply
100 mm of pipework. A trap is supplied which storage system, the Unvented System Kit, part should be connected into a drain via a tundish or air number B314, available from Andrews Water Heaters break. must be fitted. See Parts List Page 25. - Page 14 NEOflo UNVENTED SYSTEM DESIGN Expansion Vessel Temperature/Pressure Hot Water Relief Valve Wall Bracket Assembly Hose Assembly Cold Water Inlet of Water Heater Pressure Reducing Check Valve Valve/Strainer Expansion Valve Tundish CONDENSATE DISPOSAL METHODS Cold Water Feed Balanced Cold Water Fig 4.1 Take-off (if required) CONDENSATE DISPOSAL METHODS HEATER...
- Page 15 Flue Systems Examples: Concentric flue system that uses one straight The appliance can be installed using a number of length and one 90° bend. alternative arrangements depending upon the 1 x 1m straight length installation requirements It is delivered with its two 1 x 90°...
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Page 16: Fig 6.1
Open Flue. Balanced Flue. NB Do not include the Twin Adapter NB Do not include the Twin Adapter nor the Terminal 1m length 1m length 45° bend 45° bend 90° bend 90° bend Horizontal Terminal Vertical Terminal Flue Parts Part Number Flue Parts Part Number Twin to Concentic Kit, 200/300... -
Page 17: Fig 6.2
OPEN FLUE EXAMPLE Vertical Terminal Debris Guard 125mm length Horizontal Terminal 80mm Air duct connection Incline 3° back to Heater 80mm Flue duct connection Fig 6.2 HORIZONTAL FLUE EXAMPLE Concentric 90 deg. bend Horizontal Terminal SC 25/200: 375mm 90 deg. x 80mm SC 25/300: 500mm SC 25/400: 500mm bend... -
Page 18: Fig 6.4
VERTICAL FLUE EXAMPLE Vertical Terminal Concentric 90 deg. bend 90 deg. x 80mm bend 80mm Air duct extension Twin Adapter 80mm Air duct connection Fig 6.4 FLUE TERMINAL DIMENSIONS 1000mm Clip pipes every 1000mm L= 0.052 x (G+56) (tan3°=0.052) G (150 min.) min. -
Page 19: Fig 6.6
FLUE TERMINAL POSITIONS The flue discharge position for any flue type must conform to the following requirements Fig 6.6 Minimum Distance A Directly below an opening, air brick, opening window etc. B Above an opening, air brick, opening window etc. C Horizontally to an opening, air brick, opening window etc. - Page 20 Ventilation Requirements Natural Gas The gas meter, regulator and supply pipework Refer to BS 6798 and BS 5440:2 for additional must be sized so as to provide an adequate information supply to the Heater in addition to any other appliances connected to the supply. (See Techni- Open Flue Type B cal Data on the inside cover for Pressure and The room in which an appliance is installed must...
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Page 21: Fig 7.1
Electrical Connections Access to the terminal connections (Fig. 7.1) Remove the Lower Front Panel, the Connection Box IMPORTANT, this appliance must be earthed is facing you on the left hand side. See Fig 7.1. The CAUTION: Isolate the mains electrical supply Connection Box can be completely removed by before starting any work and observe all relevant loosening its fixing screws in its keyhole slots. -
Page 22: Fig 7.2
WIRING DIAGRAM Fig 7.2 NEOflo Water Heater 30/04/09... -
Page 23: Fig 8.1
COMMISSIONING After installation of the water system, open the main water supply valve, flush the system and fill the heater. Filling With Water 1. Check that the tank drain connection is fitted and closed. 2. If the appliance is connected to a hot water recirculation system, open the isolation valve immediately before the connection point to the tank. -
Page 24: Controls & Lockouts
Lockouts No Flame established. If the Heater is unable to light or detects a safety False Flame detected condition the control will lockout and the Heater will Overheat sensor > 95C or short circuit. stop firing. The display will show RESET and a Incorrect Fan speed detected number referring to the type of error. - Page 25 Diagnostics The Display can provide additional information whilst Running, In Standby and In Error, when the buttons are pressed. The table below details the sub-sections available. Pressing Service A, Service B and Reset together will, test all the segments of the LCD display. Buttons MODE Service A...
- Page 26 SERVICING Spark & Sense Electrode Health and Safety Statement : „ Turn off the Heater. This Heater contains no asbestos. „ Pull off the HT and Earth leads. „ Remove the cover over the Ignition Control In all cases, before work commences turn off connections and pull it off the Gas Valve.
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Page 27: Fig 9.1
„ Unclip the Sensor Retainer and withdraw the Throttle Sensor. Adjustment „ Trace the sensor cable back to its in-line two way connector, de-latch and disconnect. „ Replacement is the reverse. Flue Thermostat (Fig. 9.4) This is located on the Sump Flue Connection. „... - Page 28 Venturi (See Fig. 9.4) (Fig. 9.4) „ „ Remove the Lower Front Panel. Remove the Lower Front Panel. „ „ Remove the electrical connector on the Fan. Pull off the Air Tube (Fig. 9.4) „ „ Remove the two screws holding the Venturi to Undo the three screws holding the Venturi to the Fan.
- Page 29 HEATER COMPONENTS EXTERNAL Tank Inspection Hatch Temperature & Pressure Relief High Limit Valve Sensor Removable Cover (To access Control Sensor) Display Panel Control Sensor Door Fig 9.3 NEOflo Water Heater 15/06/09...
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Page 30: Heater Components Internal
HEATER COMPONENTS INTERNAL Combustion Test Point Flue Thermostat Spark & Sense Electrode Ignition Lead Fan Mounting Spacer Fan Gasket Wiring Connection Ignition Control Flue Elbow Gas Cock Release Condensate Pipe 41mm Gas Valve Air Duct Cylinder Drain Pipe 22mm Fig 9.4 Condensate Trap Venturi Air Tube... - Page 31 INSTALLATION & SERVICE HISTORY Tick appropriate: Model SC25/200 SC25/300 SC25/400 Commissioning Installer Registration No Date: Working pressure mbar Instructed User in operation? Yes/No Service Record Date Cleaned ? Pressure Date Cleaned ? Pressure Date Cleaned ? Pressure NEOflo 02/02/09...
- Page 32 Sales: Baxi Commercial Division 0845 070 1056 Wood Lane, Erdington, Birmingham B24 9QP Technical: Email: andrews@baxigroup.com 0845 070 1057 www.andrewswaterheaters.co.uk...
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