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Andrews. Built to perform.

Please read and understand these instructions before commencing installation and leave this manual with the customer for future reference.

M8670

MAXXﬂ o EVO

High eﬃ

ciency condensing stainless steel storage water heater

CWH 30/201, CWH30/301, CWH60/201, CWH60/301

INSTALLATION AND MAINTENANCE MANUAL

Содержание MAXXflo EVO CWH 30/201

Страница 1: ...nstructions before commencing installation and leave this manual with the customer for future reference M8670 MAXX o EVO High e ciency condensing stainless steel storage water heater CWH 30 201 CWH30...

Страница 2: ...General 2 MAXX o EVO Blank Page...

Страница 3: ...nner cover 4 3 Cold water supply 4 4 Unvented design 4 5 Secondary return design DHW circulation pump 4 6 Condensate disposal 4 7 Flue systems and ventilation 4 8 Maximum ue lengths 4 9 Gas connection...

Страница 4: ...n range Common combustion air intake manifold takes air from boiler room type B23 ue or directly from out side via a combined ue system C13 C33 C53 C63 The safety and operation functions of the water...

Страница 5: ...rom electricity to personal safety and life WARNING Very hot water can cause severe burns and in extreme cases death CAUTION Indicates a potentially dangerous situation for the heater and the environm...

Страница 6: ...installation adjustment servicing of this heater must be carried out by a competent person and installed in accordance with current standards and regulations Failure to correctly install or maintain t...

Страница 7: ...at work act 1974 Building regulations 2010 Electricity at work regulations 1989 Management of health and safety at work regulations 1998 Manual handling regulations 1992 Model water byelaws 1986 BS 7...

Страница 8: ...on 2016 426 Ecodesign Requirements for Energy Related Products ERP 2009 125 EC Electromagnetic Compatibility EMC Directive 2014 30 EU Low Voltage LVD Directive 2014 35 EU Boiler E ciency BED Directive...

Страница 9: ...rt kWh Weekly electricity consumption with smart controls Q elec week smart kWh Weekly fuel consumption without smart controls Q fuel week kWh Weekly electricity consumption without smart controls Q e...

Страница 10: ...doors dB 53 53 63 63 Ability to off peak hours functioning 3 Yes Yes Yes Yes Enabled smart control settings 4 1 Electricity 2 Fuel 3 If applicable 4 If smart control setting value is 1 the water heati...

Страница 11: ...tions BSP 1 1 2 Water return connection BSP 1 ELECTRICAL Electrical supply voltage Hz V Hz 220 240 50 Fuse rating on mains supply A 5 Insulation protection rating IP IP20 Power consumption standby W 3...

Страница 12: ...300 391 128 CONDENSATE TRAP 41mm 1 x PLUGGED OUTLETS 1 BSP f SECONDARY RETURN 1 BSP m INSPECTION HATCH SENSOR WELL T P VALVE EXIT TANK DRAIN INSIDE UNIT 22mm ISOLATION VALVE 97 LH Side Front Door Inne...

Страница 13: ...718 209 172 300 391 128 91 301 91 DHW 1 5 BSP m SECONDARY RETURN 1 BSP m MCWS 1 5 BSP m INSPECTION HATCH SENSOR WELL CONCENTRIC FLUE AIR 30kW 60kW Models 80mm 125mm 90kW 120kW Models 130mm 200mm REMO...

Страница 14: ...ata 14 MAXX o EVO 3 5 SYSTEM SCHEMATIC EXAMPLES EXAMPLE 1 SINGLE MAXX o EVO SCHEMATIC Model MAXX o EVO 30 MAXX o EVO 60 Flow m3 h 0 6 1 2 EXAMPLE 2 PARALLEL MAXX o EVO SCHEMATIC Maximum circulation ra...

Страница 15: ...irculation setpoint Default set point is 45O C When the B39 sensor is installed the controller will check the DHW return temperature during pump activation time Each time the temperature obtained by t...

Страница 16: ...Technical Data 16 MAXX o EVO EXAMPLE 3 MAXX o EVO BUFFER SS300 10 SCHEMATIC 3 5 SYSTEM SCHEMATIC EXAMPLES CONTINUED...

Страница 17: ...y setting 3 0O C When the temperature of the BUFFER SS300 10 tank is less than 2 0O C below the temperature of the storage tank the K21 pump is switched on 5573 Factory setting DHW sensor B3 5574 Fact...

Страница 18: ...chnical Data 18 MAXX o EVO EXAMPLE 4 BMS CONNECTIONS GBS A B REF Enable Flame Fault Modbus L N PE L N 1 2 3 4 9 Black Relay 5 6 7 8 White Relay CO NO NC CO NO NC 3 5 SYSTEM SCHEMATIC EXAMPLES CONTINUE...

Страница 19: ...s L N PE L N Remote enable volt free Flame indicator 230V 50Hz 5A Q4 DHW pump Fault indicator BSB A B REF DB CL MB CL Live Neutral Live Earth Neutral 1 2 3 4 9 B39 DHW sensor kit Black Relay 5 6 7 8 W...

Страница 20: ...t be installed under the Heater The drain tray must be no deeper than 38mm and must be 100mm wider and longer than the heater It should be piped to an adequate drain using 20mm 0 75in diameter pipe an...

Страница 21: ...ve the four screws either side of the GUI display unit at high level Loosen the two screws at low level inside the case to remove the case retaining bracket Pull the inner cover forwards and remove co...

Страница 22: ...alling Andrews Water Heaters in hard water areas we would recommend that a water treatment specialist is consulted In hard water areas scale formation can occur in all hot water systems and the higher...

Страница 23: ...y a 24 litre expansion vessel is suitable for the stored volume of all models and an average pipework system For systems with larger pipe volumes or additional storage expansion vessels with greater c...

Страница 24: ...rate An excessive ow in the secondary circuit could result in a temperature mixing e ect in the heater storage vessel resulting in a stored water temperature less than set temperature See table below...

Страница 25: ...gh a wall to the outside should be run in a minimum of 40mm diam eter External pipework should be insulated to protect against frost and freezing temperatures The condensate trap must be filled with w...

Страница 26: ...m salty air e g Coastal installations Refer to the following standards and guidance notes before installing the ue system BS5440 Flues and ventilation for gas appliances of rated input not exceeding 7...

Страница 27: ...tion is provided The internal space should not be part of a dwelling The ventilation system including mechanical ventilation shall be designed such as not to cause the installation space to be under s...

Страница 28: ...ent ventilated directly to outside air must be ventilated at high and low level The minimum free area of permanently open vents must be as follows 4 7 6 OPEN FLUE APPLIANCE IN A COMPARTMENT VENTILATED...

Страница 29: ...es 75 E Below eaves 200 F Below a balcony or car port roof 200 G Above ground roof or balcony level 300 H From vertical drain or soil pipe 150 J From an internal or external corner to an alongside bou...

Страница 30: ...small quantity of petroleum jelly is used to lubricate each ue seal before tting ue sections together Any terminal must be tted with a guard if less than 2m above ground level or if it is in a positio...

Страница 31: ...its Description 5103917 VERT FLUE KIT CWH EVO 30 60 PP 80 125 INC SUPPORT BRACKET CLAMP SEAL 7726957 HORIZ FLUE KIT CWH EVO 30 60 HORIZ FLUE KIT PP 80 125 INC ELBOW WALL COVER PLATES Part number Optio...

Страница 32: ...mum ue lengths see section 4 8 Minimum clearance between vertical terminals see item L section 4 7 13 Over 5 0m use ue condense trap Condense trap For maximum ue lengths see section 4 8 FLAT ROOF FLAS...

Страница 33: ...ELBOW PART No 7726957 90 ELBOW C W CLAMP PART No 5136151 45 ELBOW C W CLAMP PART No 5136150 FLUE CONDENSE TRAP PART No 7726982 80 1344 125 10 VERTICAL FLUE TERMINAL C W CLAMP PART No 5103917 135 590 2...

Страница 34: ...vel 300 H From vertical drain or soil pipe 150 J From an internal or external corner to an alongside boundary 300 K From a terminal facing a terminal 1 200 L Vertically from a terminal on the same wal...

Страница 35: ...exact values FLUE PARTS 80 125mm F E L C13 C33 TYPE 1 0 m Concentric Length 1 0 m 0 5 m Concentric Length 0 5 m Concentric 90 Bend 1 2 m Concentric 45 Bend 0 8 m Vertical Terminal kit 1 6 m Horizontal...

Страница 36: ...cted to the same gas supply operating at maximum load Note when replacing a MAXX o with a MAXX o EVO and reusing the existing gas isolation valve and t tings remove the new Gas Union MxF from the MAXX...

Страница 37: ...cal con nections inside see illustration below 4 10 2 VOLT FREE CONNECTIONS This heater has volt free connections which can be used for a Building Management System or a remote indica tor panel These...

Страница 38: ...alue 2000 2099 100 199 Month 1 January 12 December Time program Time value is in periods of 10 minutes Example Switch on time of 06 10 H Byte value 37 Switch o time of 22 00 L Byte value 132 Comments...

Страница 39: ...ch hot water draw o tap in succession and check that all the air is vented from the system 7 Check for leaks inside and outside of the heater 8 Turn on power to heater and operate the Q1 circulation p...

Страница 40: ...nsure that all the numbered points included in section 5 1 Commissioning General have been completed successfully before proceeding with the following NOTE A flue sample point is provided in the flue...

Страница 41: ...the heat engine to warm up fully before checking the combustion Ensure the Water heater temperature remains below 70O C during the commissioning process see above illustration if necessary open water...

Страница 42: ...temperature below 70O C by opening water outlets Check the total gas consumption gure using the following table The gas consumption must be within 5 of the gross kW input value of the data plate When...

Страница 43: ...he spring clip holding the black air intake hose onto the venturi and remove the hose Undo and remove the 5 screws securing the venturi to the gas valve and fan Remove the venturi completely and if yo...

Страница 44: ...ustment is complete A x the new LPG serial number data label supplied with the heater over the top of the existing natural gas data plate Fit LPG warning label to heater cover 1 7 25 8 7 3 6 867 25 PE...

Страница 45: ...signed to minimise the formation of Legionella bacteria The pumped tank charging process ensures that the water at the bottom of the tank reaches the same temperature as in the rest of the tank and al...

Страница 46: ...ructed on the safe use and operation of the heater and in particular detail Hand over this manual and any other literature supplied Explain the importance of air vents and the ue outlet system and tha...

Страница 47: ...9 The heat engine will continue to operate until DHW demand has been met the control timer has turned o the demand or the controls detect a fault condition 5 6 2 FAULTS AND LOCKOUTS If the heat engine...

Страница 48: ...ersonnel 6 1 1 RECOMMENDED MINIMUM SERVICING REQUIREMENTS ANNUALLY OR EVERY 4 000 HOURS Does not exclude annual gas safety checks required under Gas Safety Installation and Use Regulations 1998 1 Insp...

Страница 49: ...heater from the electrical supply Open the outer heater cover door by removing the screws on the left hand side and opening the door of the heater Disconnect the electrical connections to the fan Disc...

Страница 50: ...any signs of damage and in any case replacement of the silicone gasket every two years is recommended Inspect the burner tube for signs of damage Replace if any damage or burnt areas are found Inspect...

Страница 51: ...er until the condense pipe runs clear At the end of the cleaning process unscrew the condense trap bowl clean out and re t Inspect the Ionisation and spark electrode assemblies for damage and wear Rea...

Страница 52: ...aining the spark electrode in position and carefully withdraw Inspect for dam age and correct spark gap see illustration below 5 0mm 0 5mm Undo the two screws retaining the ame sensing electrode Withd...

Страница 53: ...exchanger and pipework for leaks 6 1 1 5 GAS RATE COMBUSTION The gas rate and combustion ue analysis must be carried out when the heater is operating at maximum loading See Section 5 2 for full detail...

Страница 54: ...lace by the nut Remove the bolt and clamp and while holding the threaded shaft allow the hatch to drop down and then angle the hatch and remove it through the opening With the use of a torch it should...

Страница 55: ...at thermostat Gas valve Electrode removal Back ow prevention ue valve The following items require isolation of water before removal and bleeding air afterwards Heat exchanger Circulation pump See the...

Страница 56: ...Remove sensor by unscrewing anti clockwise Replacement is the reverse 6 2 3 AVS37 GUI DISPLAY This is located in the centre of the heater inside the front cover Switch o electrical supply to heater R...

Страница 57: ...eplacement PCB Carefully push o all the connectors on the PCB be careful not to pull on the wires Release in turn all seven PCB support posts by squeezing the barb together at the end of the support a...

Страница 58: ...the fan Remove the four bolts securing the fan to the air arm Slide fan o venturi and remove Inspect both the venturi gasket and air arm gasket and replace if damaged Replacement is the reverse Please...

Страница 59: ...e heat engine and check for gas leaks After ve minutes check the rate and combustion is correct to the Data table page 11 Adjust using the throttle adjustment screw on the gas valve if necessary Turn...

Страница 60: ...nsor kit tted close o the shut o valves either side of the pump Drain o water from the DHW tank approximately 30 litres or if the optional pressure sensor kit is tted use the drain points between the...

Страница 61: ...ain point s to ensure the heat exchanger is as empty as possible Disconnect all electrical connections to the ue ow and return sensors Disconnect the ue from the top of the heat exchanger by pushing t...

Страница 62: ...lling the pipe o Remove the 6 screws of the heat exchanger retaining clamps and remove the clamps Warning this item is heavy Before releasing the brackets ensure support is available Carefully lift ou...

Страница 63: ...20063 104b 300 LITRE ACCESS HATCH ASSY INC O RING 7720064 105 TEMP SENSOR DHW TANK B3 7709329 106a 200 LITRE TANK 7617080 106b 300 LITRE TANK 7617079 107 28MM OBTUSE COMP ELBOW 7709372 108 OPTION CAST...

Страница 64: ...art Number 200a DOOR FOR MAXX o EVO 200L 7725796 200b DOOR FOR MAXX o EVO 300L 7725797 201 DOOR CLOSING LATCH SET 7709375 202 DOOR HINGE SET 7709376 203a DOOR GASKET MAXX o EVO 200L 7709377 203b DOOR...

Страница 65: ...R 7709314 302 LEAD FOR SPARK ELECTRODE 7709313 303 PRESS SENSOR WATER H3 7709328 304 22MM RIGID FAN GAS COCK 7709371 305 NON RETURN VALVE ASSY 7709287 306 PUMP FOR MAXX o EVO 7709310 307 PUMP NRV GASK...

Страница 66: ...TS ILLUSTRATIONS CONTINUED DRAIN COMPONENTS FLUE COMPONENTS 402 404 400 Item No Description Part Number 400 CONDENSATE SYSTEM SINGLE H E 7709358 402 FLUE SYSTEM SINGLE H E MAXX o EVO 7709360 404 FLUE...

Страница 67: ...ce 67 MAXX o EVO HEAT ENGINE SPARES 500 501 502 503 504 505 506a 506b 507 508 509a 509b 509c 510 511 512 513 514 515 516a 516b 517 518 519 520a 520b 520c 521 522 523 524 6 3 COMPONENTS ILLUSTRATIONS C...

Страница 68: ...2 BSPM STRAIGHT CONN 7709369 511 H E BURNER DOOR INSULATION 7709296 512 IONIS ELECTRIC INC GASKET SCREWS 7709311 513 1 2 GAS COCK C W O RING 7709370 514 SPARKELECTR INC GASKET SCREWS 7709312 515 GAS...

Страница 69: ...EVO 60 7709320 604 CONTROL PCB FUSES 2 PACK 7709324 605a WIRING LOOM 30 60 MAXX o EVO 7727904 606 DIN RAIL TERMINAL BLOCK 7709334 607 TEMP LIMIT THERMOSTAT 90 C 7709331 608 ON OFF SWITCH 7709332 609...

Страница 70: ...o Description Part Number 700 PIPE TANK CONN FLOW ASSY 28 7709351 701 PIPE SING H E GAS MANIFOLD 22 7709356 702 PIPE ALL UP H E CO RE AS 22 7709342 703a PIPE UP 30 45KW H E GAS 22MM 7709352 703b PIPE...

Страница 71: ...id repair Once a component is used it must be replaced at the earliest possible opportunity to ensure rapid breakdown recovery abilities are retained Essential First Aid kit contents to maintain the h...

Страница 72: ...of all control PCBs via parameter 6600 83 BSB short circuit Any No BSB communication or wires shorted Check operation of GUI or OZW672 if tted 84 BSB address collision Any Two appliances connected th...

Страница 73: ...ck for overheating is sues and return sensor B7 performance 424 811 Return temperature reading error Temperature reading less than 0O C or greater than 124O C Check ow sensor B7 and replace if necessa...

Страница 74: ...the reset for more than 10 seconds will also produce this lockout 848 849 Parameter update nished Press reset to apply changes 160 Fan speed threshold not reached Any Fan does not reach required spee...

Страница 75: ...ensor connected to the AGU2 5 extension module 353 Cascade ow sensor B10 missing Any Check connections and con guration of common ow tempera ture sensor B10 which is located at the feed into the tank...

Страница 76: ...uilt to perform BAXI HEATING COMMERCIAL BRANDS ALL TOGETHER BETTER 5HJLVWHUHG RI FH DGGUHVV D L HDWLQJ 8 URRNV RXVH RYHQWU 5RDG DUZLFN 9 June 2019 Sales 0345 070 1055 Technical 0345 070 1057 Web andre...

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