andrews MAXXflo EVO Lite Installation And Maintenance Manual
  1. Manuals
  2. Brands
  3. andrews Manuals
  4. Water Heater
  5. MAXXflo EVO Lite
  6. Installation and maintenance manual

andrews MAXXflo EVO Lite Installation And Maintenance Manual

High efficiency condensing stainless steel direct storage water heater
Hide thumbs Also See for MAXXflo EVO Lite:
Table of Contents

Advertisement

Quick Links

Download this manual
INSTALLATION AND MAINTENANCE MANUAL
MAXXfl o EVO Lite
High effi ciency condensing stainless steel direct storage water heater
SC15/201, SC25/201, SC35/201, SC45/201
Please read and understand these instructions before commencing installation and leave this manual with the customer for future reference.
Andrews. Built to perform.
M9943

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the MAXXflo EVO Lite and is the answer not in the manual?

Questions and answers

Related Manuals for andrews MAXXflo EVO Lite

Summary of Contents for andrews MAXXflo EVO Lite

  • Page 1 MAXXfl o EVO Lite High effi ciency condensing stainless steel direct storage water heater SC15/201, SC25/201, SC35/201, SC45/201 Please read and understand these instructions before commencing installation and leave this manual with the customer for future reference. Andrews. Built to perform. M9943...
  • Page 2 UK users is drawn to their responsibilities under the Health and Safety Regulations 1993. All installation and service on Andrews Water Heaters must be carried out by properly qualifi ed personnel and, therefore, no liability can be accepted for any damage or malfunction caused as a result of intervention by unauthorised personnel.

  • Page 3: Table Of Contents

    Contents Safety 1.1 General safety instructions ....................1.2 Recommendations ......................1.3 Specifi c safety instructions ....................1.3.1 Additional guidelines ....................1.4 Liabilities ..........................1.4.1 Manufacturer’s liability ....................1.4.2 Installer’s liability ......................1.4.3 User’s liability ......................About this manual 2.1 General ..........................2.2 Additional documentation ....................
  • Page 4 Contents Installation 6.1 General ..........................6.2 Preparation 6.2.1 Front cover removal ....................6.3 Water connections 6.3.1 Connecting the cold water system ................6.3.2 Water systems ......................6.3.3 Anti-vacuum valve ....................6.3.4 Unvented system ..................... 6.3.5 De-stratifi cation pump ....................6.3.6 Pressure relief valves ....................6.3.7 Secondary return system ..................
  • Page 5 Contents Settings 9.1 List of parameters ......................9.2 Setting the parameters ..................... 9.2.1 Logging into Engineer mode ................... 9.2.2 Accessing complete parameter list ................ Maintenance 10.1 General ........................... 10.2 Maintenance message ....................10.2.1 Resetting the maintenance message ..............10.3 Standard inspection and maintenance operations ............10.3.1 Minimum service requirements ................

  • Page 6: Safety

    1 Safety 1.1 General safety instructions Danger If you smell gas: 1. Do not use naked fl ames, do not smoke and do not operate electrical contacts or switches (lighting, motor, lift etc) 2. Shut off the gas supply 3. Open the windows 4.
  • Page 7 Danger Do not store any explosive or highly fl ammable materials close to the heater. Warning Risk of burns! Be careful when using domestic hot water. Depending on the heater settings the temperature of the hot water can rise above To protect from injury, you should install approved mixing valves in the water system to reduce water temperature at the outlet.

  • Page 8: Recommendations

    Damaged or illegible instructions and warning stickers must be replaced immediately. Modifi cations to the heater require the written approval of Andrews Water Heaters. 1 Safety MAXXfl o EVO Lite...

  • Page 9: Specifi C Safety Instructions

    1.3 Specifi c safety instructions 1.3.1 Additional guidelines In addition to the legal requirements and guidelines, the supplemen- tary guidelines in this manual must also be followed. Supplements or subsequent regulations and guidelines that are valid at the time of installation shall apply to all regulations and guidelines specifi...

  • Page 10: About This Manual

    2 About this manual 2.1 General This manual describes the installation, use and maintenance of a MAXXfl o EVO Lite Water Heater. This manual is part of all the docu- mentation supplied with the heater. 2.2 Additional documentation The following documentation is available in addition to this manual: •...

  • Page 11: Technical Specifi Cations

    3 Technical specifi cations 3.1 Homologations 3.1.1 Certifi cations Tab.1 UKCA Product Identifi cation Number 0558DM2335 CE Product Identifi cation Number 0558DM2335 Class NOx Type of fl ue gas connection (1) EN 15502-1 (2) When installing a heater with B fl...

  • Page 12: Technical Data

    3.2 Technical data Tab. 3 General performance data Unit SC15 SC25 SC35 SC45 Heat input - gross (min - max) 6.1 - 15.0 10.7 - 25.0 10.7 - 35.0 10.7 - 45.0 Heat input - net (min - max) 5.5 - 13.5 9.6 - 22.5 9.6 - 31.5 9.6 - 40.5...
  • Page 13 Tab. 9 Flue data Unit SC15 SC25 SC35 SC45 Flue connection single Flue connection concentric 80 / 125 Max fl ue equivalent length (single) B23 Max fl ue equivalent length (concentric) C13, C33 Max fl ue equivalent length (twin) C53 Flue gas mass fl...

  • Page 14: Dimensions And Connections

    3.3 Dimensions & connections CHECK VALVE 1.5" BSP (m) GAS INLET SECONDARY 0.75" BSP (f) RETURN (Isolation valve with 1" BSP (m) inlet measuring point supplied loose with unit) TANK INSPECTION HATCH CONCENTRIC FLUE/AIR Ø80mm / Ø125mm 1 x PLUGGED OUTLETS 1"...

  • Page 15: Electrical Diagram

    3.4 Electrical diagram 3 Technical specifi cations MAXXfl o EVO Lite...

  • Page 16: Description Of The Product

    4 Description of the product 4.1 General description This Andrews Water Heater is a gas fi red, low NOx, direct fi red water heater, with an integrated stainless steel tank. Fully automatic electronic controls are integrated into the heater, with a wide range of control strate- gies and sensors 4.2 Operating Principle...

  • Page 17: Main Components

    4.3 Main components 4.3.1 Water heater components 1. Hot water outlet 2. Return water inlet 3. Cold water inlet 4. DHW tank 5. Controller 6. GUI Display 7. Combustion fan 8. Circulation pump 9. Condensate trap 10. Tank sensor well (behind plate) 11.

  • Page 18: Control Panel Description

    4.4 Control panel description 4.4.1 Control panel display The control knob is used to operate the Graphical User Interface. Press the control knob inwards to press ENTER Critical information bar DHW temp 1 58.9 Rotary selection Graphical Press to ENTER display RESET under Back / ESC...

  • Page 19: Standard Delivery

    4.5 Standard delivery 4.5.1 Items included with standard package List of standard items as part of water heater package: • MAXXfl o EVO Lite water heater • Upper gas union (for connection to gas supply) • Gas shutoff valve with pressure tapping point •...

  • Page 20: Accessories And Options

    2 freely confi gured temperature sensor inputs • 1 multipurpose input The module kit (part number 7720070) is available from Andrews Wa- ter Heaters. 4.6.3 Return sensor kit This strap-on temperature sensor kit is designed for mounting onto the DHW return pipe to acquire the temperature of the water fl owing in- side.

  • Page 21: Web Server

    Energy indicators give clear signals when “Green limits” are ex- ceeded The web server kit (part number 7726955) is available from Andrews Water Heaters. 4.6.6 Anti vacuum valve An Anti-vacuum valve must be fi tted to prevent a vacuum forming in installations where there is the potential of the draw off...

  • Page 22: Flue Backfl Ow Prevention Kit

    • 2x Heat exchanger fl ow/return pipe connection O-rings The Maintenance kit (part number 7812351) is available from Andrews Water Heaters. 4.6.12 Paint touch up kit The Paint touch up kit contains four touch up paint pots that have an integral application brush, to suit all colour panels on the water heater.

  • Page 23: Before Installation

    5 Before installation This heater must be installed in accordance with relevant Standard Specifi cations, Codes of Practice and current Build- ing Regulations, together with any special regional requirements of the Local Authorities, Gas undertaking and Insur- ance Regulations for the Electrical Equipment of Buildings. The installation of this heater must be in accordance with the relevant requirements of: 5.1 Installation regulations •...

  • Page 24: Installation Requirements

    150 ppm (7-10 degrees Clark). For this reason, base exchange water treatment is strongly recommended in hard water areas. When installing Andrews Water Heaters in hard water areas we would recommend that a water treatment specialist is consulted 5 Before installation...

  • Page 25: Choice Of Location

    (left hand side) CATEGORY: II2H3P FLUE TYPES: B23,C13,C33,C53,C63 0558-22 0063-22 Type approval designation NG ONLY ADJUSTED FOR G20 @ 20mbar Gas type and pressure MAXXflo EVO Lite 7800598 MODEL: SC 15/201 Model Name HEAT INPUT (GROSS) Q(Hs)= 15.0kW Heat, gas fl...
  • Page 26 The location selected for the installation of this heater must allow the provision of a satisfactory fl ue, an adequate, clean air supply, a drain and be well illuminated. The fl oor on which the heater is located must be level and of suffi...

  • Page 27: Transportation & Unpacking

    5.4 Transportation & unpacking Inspect packaging for any signs of damage. Any damage or shortage must be notifi ed with Andrews Water Heaters immediately, as detailed on the warranty card. Pry off the crate top and sides but keep it on the pallet base until the heater is moved into its permanent position.

  • Page 28: Connection Diagrams

    5.6.1 Secondary return pump Q4 To enable this function in the MAXXfl o EVO Lite controls, it is fi rst (PUMP supplied (PUMP supplied necessary to purchase from Andrews Water Heaters the Expansion by others) by others) module kit (7720070).
  • Page 29 Q4 OFF during the legionella function, or consider using the DHW Nominal setpoint and DHW reduced setpoint with the time clock to create brief daily operation periods at 70ᵒC (contact Andrews Water Heaters for further advice) 5 Before installation...

  • Page 30: Two Heaters Fi Tted In Parallel

    K21 Buff er tank transfer pump (supplied by others) ST1 Buff er tank temperature sensor (pre-fi tted to Buff er tank) Full fi tting instructions are supplied with the SS300-10 buff er tank, avail- able from Andrews Water Heaters (7735728). MAXXfl o EVO BUFFER Lite...

  • Page 31: Installation

    6 Installation 6.1 General Caution High centre of gravity - When manoeuvring, be careful to avoid tipping the heater more than 10 Caution Installation of the appliance must be done by a qualifi ed engi- neer in accordance with prevailing local and national regulations 6.2 Preparation 6.2.1 Front cover removal Once the water heater is in position remove the outer cover to gain ac-...

  • Page 32: Water Connections

    The MAXXfl o EVO Lite range of storage water heaters are designed to operate from a mains fed unvented water supply. An unvented system kit is available from Andrews Water Heaters. However, the heater may be connected to an open vent supply provided minimum supply pressures are satisfi...

  • Page 33: Unvented System

    When using the heater on an unvented hot water storage system, the Un- vented System Kit, available from Andrews Water heaters (part number 7799195) must be fi tted. When used in an unvented system, the Heater will supply hot water at a maximum of 3.5 bar or at the pressure available at the mains feed if this is lower.

  • Page 34: Stratifi Cation Pump

    6.3.5 De-stratifi cation pump By virtue of its design, an internal DHW tank de-stratifi cation pump is not required. 6.3.6 Pressure relief valves The relief valves fi tted to this heater must not be used for any other pur- pose. No fi tting should be installed between the expansion valve and the cylinder.

  • Page 35: Condensate Connection

    6.3.8 Condensate connection Condensation is formed in the normal operation of the heater and this must be continuously discharged into a drain. Given the acidity level of condense discharge (pH 3.5 - 4.5) only plastic material can be used for the discharge pipe work.

  • Page 36: Gas Connections

    The installer is responsible for ensuring that the right type of fl ue system is used and that the diameter and length are correct. For optimal installa- tion, the accessories supplied by Andrews Water Heaters should ensure that the correct system components are used.

  • Page 37: Material

    70kW (net) 6.5.2 Material When using a fl ue system that has not been supplied by Andrews Water Heaters, make sure that they are certifi ed for the type and use. Check the text string printed on the fl...

  • Page 38: B 23 General Ventilation Requirements

    6.5.3 B Ventilation general requirements DANGER Flue type B - Is an open fl ue appliance where air is drawn from the room or compartment in which the heater is installed and therefore the room or compartment must be ventilated to outside air.

  • Page 39: Ventilation In A Room Or Space

    6.5.4 B Ventilation in a room or space Installations in a room or space with ventilation direct to outside air re- quire the following minimum free area of permanently open vent: Tab. 19 Heater Model Minimum vent free area SC 15 65 cm SC 25 110 cm...

  • Page 40: B 23 Flue Terminal Positions

    6.5.7 B Flue terminal positions Terminals should be so positioned as to avoid products of combustion entering openings into buildings or other fl ues or vents Minimum clearance Tab. 22 Code Description Directly below an opening, air brick, opening window etc Above an opening, air brick, opening window etc Horizontally to an opening, air brick, opening window etc Below gutters, soil pipes or drainpipes...

  • Page 41: C 13 C 33 C 53 C 63 General Requirements

    6.5.8 C General requirements Flue and air ducts are supplied to a concentric design and are 80/125mm fl ue size. See section 6.5.11 for component choices. Terminal positions must comply with the requirements detailed in section 6.5.10 • Flue type C - Any terminal used must comply with the requirements of BS EN 1856-1 •...

  • Page 42: C 13 C 33 C 53 C 63 Flue Terminal Positions

    6.5.10 C Flue terminal positions Terminals should be so positioned as to avoid products of combustion entering openings into buildings or other fl ues or vents Minimum clearance Tab. 25 Code Description Directly below an opening, air brick, opening window etc Above an opening, air brick, opening window etc Horizontally to an opening, air brick, opening window, door Below gutters, soil pipes or drainpipes...

  • Page 43: Flue Parts Available

    6.5.11 Flue parts available Tab. 26 Part number: Flue Kits - Description 5103917 VERT FLUE KIT PP 80/125 INC. SUPPORT BRACK- ET CLAMP & SEAL 7726957 HORIZ FLUE KIT HORIZ FLUE KIT PP 80/125 INC. ELBOW & WALL COVER PLATES Part number: Optional Flue Parts - Description 5136148 80/125 1 METER CUTABLE EXT.

  • Page 44: Horizontal Fl Ue Set Up

    Flat roof fl ashing E065 Angled roof fl ashing E066 For maximum fl ue lengths see section 6.4.15 6.5.13 Horizontal fl ue set up Standard length cut to suit wall thickness Standard length cut to suit wall thickness Wall Sealing Sealing plates clamps...

  • Page 45: 80/125 Concentric Fl Ue Dimensions

    6.5.14 80/125mm concentric fl ue dimensions Vertical fl ue terminal Flue condensate trap Condensate trap inc. Clamp Part no 7726982 Part no E211 Part no 5103917 Ø32 Ø125 Ø40 Ø80 Ø123/124 1344 Elbow inc. Clamp Elbow inc. Clamp Part no 5136151 Part no 5136150 Ø125 Ø125...

  • Page 46: Maximum Fl Ue Lengths

    6.5.15 Maximum fl ue lengths Flue Equivalent Length (FEL) for type B fl ue = 40 m Flue Equivalent Length (FEL) for type C fl ue = 20 m Flue Equivalent Length (FEL) for type C fl ue = 35 m Maximum number of 45 or 90 bends...

  • Page 47: Electrical Connections

    6.6 Electrical connections 6.6.1 General requirements External wiring to the heater must be installed in accordance with current Regulations for the wiring of buildings and to any Local Regulations that may apply. This heater is designed to operate from a 230V, single phase supply fused at 5 amps.
  • Page 48 Inside the electrical enclosure at the top is the location for the fused ter- minal strip (c) for installer wiring. For cable entry to the heater there are 4x plain holes (c) located on the top of the heater which can be used for DN20 cable glands (not sup- plied).

  • Page 49: Bms Connections - Basic

    6.6.3 BMS connections - Basic This heater has communication connections, which can be used for a Building Management System, web server or expansion of inputs/out- puts. Basic BMS connection (Fault, Operation signal & remote enable) Clip the Expansion module into the 3 chassis holes provided and connect the ribbon cable to the bottom left (see section 6.6.2 for location illustra- tion).

  • Page 50: Bms Connections - Modbus

    (if fi tted) and can be used by the optional Siemens OZW672 Web Server, to provide access to the heater via the Internet or mobile phone app. Please contact Andrews Water Heaters for further advice. 6 Installation MAXXfl o EVO Lite...

  • Page 51: Filling The Installation

    6.7 Filling the installation 6.7.1 Filling the condensate trap Once the heater is in its fi nal location and connected up to the conden- sate drain. It is important before commencing commissioning to fi ll up the condensate trap. Carefully pull the blue elbow from the top of the condensate trap and fi ll the trap with water until water fl...

  • Page 52: Commissioning

    7 Commissioning 7.1 General Danger Commissioning should only be carried out by an approved in- staller. Failure to correctly install this heater could cause injury to persons or damage to property. Caution The gas mixture and burner off -set gas rate (minimum load rate) is preset by the manufacturer.

  • Page 53: Activate Chimney Sweep Function

    7.2.2 Activate chimney sweep function Using the control screen situated on the front face of the heater, perform the following actions to operate the burner: 1. Rotate thumb wheel clockwise to scroll down to the “setup” screen. Regional settings Special operations 2.

  • Page 54: Adjusting The Co Rate

    SC45 1m 25s (+/- 4s) Chimney sweep function Off Contact Andrews Water Heaters for advice if the gas input rating is outside the values given in the table above. Turn off “chimney Sweep” function when testing is complete. 7 Commissioning...

  • Page 55: Gas Settings

    7.3 Gas settings 7.3.1 Conversion from Natural gas (G20) to Propane (G31) This water heater is supplied from the factory already set up for G20 Natural Gas, but each heater can be converted on site to operate on Liquefi ed Propane Gas (G31). CAUTION This conversion must be carried out by a competent qualifi...
  • Page 56 LPG ONLY ADJUSTED FOR G31 @ 37mbar CATEGORY: II2H3P FLUE TYPES: B23,C13,C33,C53,C63 may need purging before gas is available for ignition at the 0558-22 MAXXflo EVO Lite 0063-22 MODEL: 7800598 SC 15/201 NG ONLY ADJUSTED FOR G20 @ 20mbar...

  • Page 57: Final Instructions

    7.4 Final Instructions 7.4.1 Setting the time clock and DHW program The DHW time clock is factory programmed to optimise this heaters ef- fi ciency at the declared load profi le under Ecodesign Regulations. It is essential that the time / date is set correctly and the DHW operation times have been programmed according to the require- ments of the end user.

  • Page 58: Operation

    8 Operation 8.1 General All access to functions and information for the operation of the heater is made via a Graphical User Interface (GUI). Input is made using the rotary control and selection / entering is made by pushing the rotary control inwards.

  • Page 59: Information Bar Symbols

    8.2.2 Information bar symbols The information bar displays the operational status of the heater and the four symbols that can be displayed are described below: Standby - Heater is in standby mode. Only frost protec- tion is active. Burner active - The burner is in operation and a fl ame is present.

  • Page 60: Anti-Legionella Function

    8.3 Anti-Legionella function 8.3.1 General information Legionella bacteria is commonly found in water. The bacteria mul- tiply where temperatures are between 20 - 45°C and nutrients are available. The bacteria are dormant below 20°C and do not survive above 60°C. Legionnaires’...

  • Page 61: Anti-Legionella Settings

    8.3.2 Anti-Legionella settings 1 B39 Return sensor 2 Q4 Return pump 3 B3 DHW Tank sensor When activated via the heater controls, the anti-legionella function will be satisfi ed when the DHW tank temperature sensor (B3) has detected that the anti-legionella setpoint has been reached for the length of time set (1646 Legionella function duration).

  • Page 62: Settings

    9 Settings 9.1 List of parameters Tab. 37 PARAMETER DESCRIPTION FACTORY NOTES DEFAULT Time of day and date Time & Date Current time and date settings. These settings can be changed. Start of summertime Date of start for British Summer Time. An automatic one hour adjustment will be made at 01:00 on this date.
  • Page 63 PARAMETER DESCRIPTION FACTORY NOTES DEFAULT DHW (continued) 1620 DHW release Time Programme Defi nes when the heater is released for DHW heating 24h / day When this setting is used, DHW heating is continu- ously released as long as it is switched on. Time program 4/DHW When using this setting, a specifi...
  • Page 64 PARAMETER DESCRIPTION FACTORY NOTES DEFAULT DHW (continued) 1660 Pump release Time pro- Set desired option for activation of the DHW circulation pump gramme 5 (see below) DHW release Time program 5 Time program 4/DHW With this parameterization, the circulating The circulating pump is released accord- The circulating pump is released accord- pump is released when DHW heating ing to independent time program 5.
  • Page 65 PARAMETER DESCRIPTION FACTORY NOTES DEFAULT DHW Storage tank 5050 Charging temp max Maximum temperature that can be charged by the burner(s) 5060 DHW electric immersion Substitute In place of the gas burner , DHW can also be heated with an heater operating mode electric immersion heater.
  • Page 66 PARAMETER DESCRIPTION FACTORY NOTES DEFAULT DHW storage tank (continued) 5101 Pump speed minimum SC15 = 72% Limitation of minimum pump speed set using parameter 2322 SC25 = 55% SC35 = 72% SC45 = 100% General functions (used for controlling the optional BUFFER SS300-10 5570 Temp diff...
  • Page 67 PARAMETER DESCRIPTION FACTORY NOTES DEFAULT Confi guration (continued) 6046 Function input H2 None Defi nes purpose of H2 multi-use input on a AGU2.550 expan- module 1 sion module 6047 Contact type H2 Normally Closed Defi ne whether the input is NO or NC (for 0 - 10 Volt setup module 1 this value is ignored) 6049...
  • Page 68 PARAMETER DESCRIPTION FACTORY NOTES DEFAULT Error / Fault 6700 - 6999 Fault history Fault history for last 20 reported faults. Time, date , phase no, error codes and sub codes. Service/special operation 7040 Burner hours run mainte- Burner run hours that must be exceeded before a mainte- nance interval nance message is displayed 7041...
  • Page 69 PARAMETER DESCRIPTION FACTORY NOTES DEFAULT Input/output test 7700 Relay test No test Used to test the outputs of the heater control PCB (QX2 is the internal heat exchanger pump) or the outputs of the AGU2.5 expansion module 7713 Output test P1 Used to test internal pump speed control.
  • Page 70 PARAMETER DESCRIPTION FACTORY NOTES DEFAULT Diagnostics producer 8304 Boiler pump Q1 Status of Primary system pump 8308 Boiler pump speed Internal pump speed 8310 Boiler temp Current primary fl ow temperature 8311 Boiler set point System calculated fl ow temperature set point 8312 Boiler switch point Indicates next fl...
  • Page 71 PARAMETER DESCRIPTION FACTORY NOTES DEFAULT Burner control 9500 Prepurge time The length of time to purge the fl ue system on startup of the burner can be increased up to 51 seconds if required 9501 Prepurge time min Minimum possible pre-purge time, beyond which it is not possible to reduce parameter 9500 9512 Required speed at ignition...

  • Page 72: Setting The Parameters

    9.2 Setting the parameters In order to be able to access any of the parameters listed in section 9.1 it will be necessary fi rst to log into the controls as an engineer. 9.2.1 Logging into engineer mode 1. Using the Graphical User Interface (GUI), screen, move the con- trol knob to select “Setup”...

  • Page 73: Accessing Complete Parameter List

    9.2.2 Accessing complete parameter list Complete parameter list Comple 1. After logging into engineer mode. Use the control knob to select the adjustment page tab and press ENTER. 2. Select “Complete parameter list” and press ENTER. You now have access to all available parameters for viewing and adjustment starting from “Time of day and date”...

  • Page 74: Maintenance

    10 Maintenance 10.1 General To ensure continued effi cient operation of the heater it is recommended that it is checked and serviced at regular intervals. The frequency of serv- icing will depend upon the particular installation and usage but in every case a maximum of twelve months should be allowed between service inspections.

  • Page 75: Standard Inspection And Maintenance Operations

    10.3 Standard inspection and maintenance operations 10.3.1 Minimum service requirements It is recommended that the heater is inspected annually or every 4000 hours of operation. Any maintenance work found during the inspection should be done according to need. This maintenance work should include: 1.

  • Page 76: Inspect And Clean Burner Assembly

    10.3.2 Inspect and clean burner assembly Important For a complete inspection of the burner and the inside of the heat exchanger it is recommended that the burner assembly is removed from the front of the heat exchanger complete with the fan, venturi and gas valve.
  • Page 77 9. Inspect the black silicone moisture seal (b). Replace seal if it is hard to the touch, cracked or is damaged. In any case, replacement of the silicone gasket every two years is recom- mended. a a a 10. Inspect the thermal rope gasket (c). Replace if there are gaps in the rope or it is damaged.

  • Page 78: Cleaning Out Condensate Trap

    10.3.3 Clean out condensate trap Remove the condensate trap bowl (f), unscrew by hand. Rinse out and refi t. 10.3.4 Ionisation and spark electrode inspection (burner assembly removed) With the burner removed 1. Inspect the Ionisation (h) and spark electrode (g) assemblies. Re- place any electrode where cracks or metal defects are visible.

  • Page 79: Ionisation And Spark Electrode Inspection (Burner Not Removed)

    10.3.6 Ionisation and spark electrode inspection In order to maintain optimum reliability, it is recommended that both sets of electrodes are replaced every three years regardless of their condition. Both of these electrodes are best inspected when they are still in place and the entire heat exchanger door has been removed (see 10.3.2), but can also be inspected by carrying out the following : 1.

  • Page 80: Condensate Pipework And Syphon Trap

    20 minutes of burner operation. Check that you have followed instructions correctly (see 7.2.4) and check that your gas analyser is functioning correctly. Contact Andrews Water Heaters on the customer support number given on the rear cover of this manual, for advice.

  • Page 81: Inspect And Fl Ush Dhw Storage Tank

    10.3.10 Inspect and fl ush DHW storage tank The storage tank should be inspected annually and cleaned if required. To gain access for inspection please carry out the following procedure: 1. Turn off the electrical supply to the heater. 2. Shut of the cold water supply to the tank. 3.

  • Page 82: General

    10.4 Specifi c maintenance operations 10.4.1 General CAUTION None of the controls are repairable. If they are not functioning they must be replaced. CAUTION In all cases, before any work commences TURN OFF the mains electricity and gas supply to the heater The majority of component items do not require isolating from the water system before removal.

  • Page 83: Dhw Tank Temperature Sensor (B3)

    10.4.3 DHW tank temperature sensor (B3) Perform the following tasks to remove the Tank sensor B3: 1. Remove tank sensor access panel located at the bottom left hand side of the heater, to reveal the tank (a) 2. Loosen the screw (c) securing the sensor in the sensor well 3.

  • Page 84: Gui Screen

    10.4.5 Graphical User Interface 1. Keeping hold of the GUI, remove the four retaining screws (e). 2. Remove the electrical connector from the back of the GUI, by pushing the connector off (f). Do not pull on the wires when removing. 3.

  • Page 85: Fan

    10.4.8 Fan The combustion fan is best removed when the whole burner assembly The combustion fan is best removed when the whole burner assembly has been detached from the heat exchanger (see 10.3.2 for details), but has been detached from the heat exchanger (see 10.3.2 for details), but can also be removed individually if these steps are followed: can also be removed individually if these steps are followed: 1.

  • Page 86: Electrodes

    10.4.10 Electrodes These are located on the front of the heat exchanger. 1. Pull off the connector from the Ignition electrode (h) or Ionisation electrode (i). 2. Undo the two screws retaining each electrode bracket and with- draw. 3. Replacement is the reverse ensuring that the gasket seal is placed correctly and is in good condition.

  • Page 87: Heat Exchanger

    10.4.12 Heat exchanger CAUTION Changing the following components will require a partial drain- ing of the water system. Once completed it is essential that all the air is removed from the heat exchanger before the heater is operated. To not do so may damage the heat exchanger and invalidate the warranty.
  • Page 88 • Loosen the fl ue clamp (k) and push the fl ue section (l) upwards so that it clears the heat exchanger. • Isolate the cold water supply, hot water outlet and return system to the heater. • Remove the lower left hand side panel by loosening two screws (m) and removing two screws (n).

  • Page 89: Troubleshooting

    11 Troubleshooting 11.1 Error codes Tab. 38 Error Error Code De- Diag. Notes Code scription Code Boiler temperature 1, Other Water heater fl ow sensor (B2) is outside normal limits sensor error Water heater fl ow sensor (B2) is short-circuit. Check connection for possible contamination or faulty sensor.
  • Page 90 Error Error Code De- Diag. Notes Code scription Code SLT Lockout 306 431 Electronic temperature limits exceeded. General overheating issue. Check 432 433 for pump operation, trapped air and heat exchanger blockages. Monitor 434 435 temperatures of system to establish problem area. 436 756 429 818 Safe reset of the error sub code 433 (see above) has not been met.
  • Page 91 Error Error Code De- Diag. Notes Code scription Code Loss of fl ame during Count of loss-of-fl ame incidents exceeded (a maximum of 15 loss of fl ame operation incidents are permitted in a 24 hour period ) Flame lost in operation during safety time, before the start of the modulation phase.
  • Page 92 Error Error Code De- Diag. Notes Code scription Code Grid frequency out- The frequency (Hz) of the electrical supply is outside permitted tolerance. side permitted range Check electrical supply to heater. Input BX, same sen- BX sensor duplicated - Two sensor inputs have been defi ned twice with the sors same sensor type (e.g.

  • Page 93: Error Memory

    11.2 Error memory 11.2.1 Accessing error history The GUI screen can display information about the last 20 errors or main- tenance messages recorded by the controls. Each of the 20 recorded entries contains the time and date that the incident was logged, software diagnostic code and burner control phase.

  • Page 94: Fault Fi Nding

    11.3 Fault fi nding 11.3.1 Burner control phase As well as the details of the error it is also useful to know the burner control phase in which the error has occurred. The control phase will detail what operation mode the controls were active in, at the time of the error.

  • Page 95: Decommissioning, Removal Recycling

    12 Decommissioning, removal & recycling 12.1 Decommissioning & recommissioning If the heater is to be left unused for an extended period of time (three months or more) it is recommended that the heater is isolated and drained, until the heater is required to be brought back into use once again.

  • Page 96: Spare Parts

    13 Spare parts 13.1 Tank & sundry spares 111a 15-25kW 111b 35-45kW 115a 15-25kW 115b 35-45kW Item No. Description Part Number Option - Return sensor kit 7720071 Option - Anti vac valve 7799189 3/4” Check valve assembly 7805932 Inspection hatch c/w bridge, nut & o-ring G175 Access hatch o-ring 5142675...

  • Page 97: Cover Spares

    13.2 Cover spares Item No. Description Part Number Duct plate gasket Set 7805886 Cover white (c/w gaskets and logo) 7805887 Cover fi xings set 7805930 Cover gasket set 7805931 13 Spare parts MAXXfl o EVO Lite...

  • Page 98: General Component Spares

    13.3 General components spares SC 15kW SC 25-35-45kW Item No. Description Part Number Spark generator 7709314 Ionisation lead 5142139 Lead for spark electrode 7709313 Flow and return temperature sensors 7805933 Pump 7709310 Pump Gasket 7720039 Spare drain valve 22mm 7727903 13 Spare parts MAXXfl...

  • Page 99: Drain & Fl Ue Spares

    13.4 Drain & fl ue spares Item No. Description Part Number Condensate pipe assembly 7805934 Flue seal set S102186 Flue pipe 7805935 Flue bung 5142574 13 Spare parts MAXXfl o EVO Lite...

  • Page 100: Heat Engine Spares

    13.5 Heat engine spares 506a 506b 507a 507b 513a 513b 13 Spare parts MAXXfl o EVO Lite...
  • Page 101 13.5 Heat engine spares (continued) 15kW 25-45kW HEAT EXCHANGER HEAT EXCHANGER Item No. Description Part Number Flue outlet gasket 7805936 Temp sensor fl ue B8 5139798 Thermal fuse Not replaceable H/E Silicone door seal 5139774 H/E Burner door insulation 7805937 H/E Nut set for burner door 7817002 506a...

  • Page 102: Wiring Centre Spares

    13.6 Wiring centre spares 603a 603c 603d 603e Item Description Part Number Cable Gland 7709386 Option - Modbus clip-in module kit 7720069 Option - Expansion module kit 7720070 603a Control PCB SC15 7805951 603c Control PCB SC25 7805952 603d Control PCB SC35 7805953 603e Control PCB SC45...

  • Page 103: Copper Spares

    13.7 Copper spares - 15kW models SC15 with cover removed SC15 with components & panels removed for clarity Item No. Description Part Number Pipe 15kW tank connection fl ow 7805956 Pipe 15kW Gas 7805957 Pipe 15kW H/E Return 7805958 Pipe 15kW H/E Flow 7805959 Pipe 15kW 200L Bulk head return 7805960...
  • Page 104 13.7 Copper spares - 25-35-45kW models SC 25-35-45 with cover removed SC25-35-45 with components & panels removed for clarity Item No. Description Part Number Pipe 25+35+45kW tank connection fl ow 7805963 Pipe 25+35+45kW H/E Flow 7805964 Pipe 25+35+45kW gas 7805965 Pipe 25+35+45kW H/E Return 7805966 Pipe 25+35+45kW 200L Bulk head return...
  • Page 105 BLANK PAGE Appendix MAXXfl o EVO Lite...

  • Page 106: Erp Technical Data

    ErP technical data Appendix MAXXfl o EVO Lite...

  • Page 107: Product Fiche

    Fiche Appendix MAXXfl o EVO Lite...
  • Page 108 FM00866 EMS514880 13755 Sales 0345 070 1055 Technical 0345 070 1057 Web andrewswaterheaters.co.uk April 2022 June 2019 Andrews. Built to perform. ALL TOGETHER BETTER BAXI HEATING COMMERCIAL BRANDS...

This manual is also suitable for:

Sc15/201Sc25/201Sc35/201Sc45/201

Table of Contents