Installation Manual and Operating Instructions
Gas Heaters
miniMAXX
WRD 11 -2 .B..WRD 14 -2 .B..WRD 18 -2 .B..
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Page 1: ...Installation Manual and Operating Instructions Gas Heaters miniMAXX WRD 11 2 B WRD 14 2 B WRD 18 2 B WRDB GB PT 05 06 JS ...
Page 2: ...nventional hea ters due to the possibility of power adjustment and no permanent pilot flame Natural gas LPG burner Semi permanent pilot burner which only functions during the period between the opening of the water valve and the ignition of the main burner Heat exchanger without tin lead covering Water automatic in fibreglass reinforced polyamide 100 recyclable Automatic adjustment of the water fl...
Page 3: ...urner status check 35 Switch LED Battery status check 36 Front 37 Opening for mounting on the wall 38 Connection collar to the combustion gases pipe 39 Flue with non return device 40 Gas automatic 42 Digital display Dimensions mm A B C D E F G H Ø Natural gas LPG WRD11B 310 580 228 110 463 60 25 3 4 1 2 WRD14B 350 655 228 130 510 95 30 3 4 1 2 WRD18B 425 655 334 130 540 65 30 3 4 1 2 Tab 3 Dimensi...
Page 4: ...ion valve 9 Venturi 10 Temperature volume selector 11 Water automatic 12 Command cone 13 Water flow regulator 14 Water filter 15 Micro switch 16 Cold water pipe 17 Diaphragm 18 Main gas valve 19 Maximum gas adjusting screw 20 Gas supply pipe 21 Gas filter 22 Hot water pipe 23 Ignition unit 24 Battery compartment 25 Servo valve 26 Power selector 27 Gas valve 28 Pilot valve 29 Pilot injector 30 Pilo...
Page 5: ...ies its operation B To do so just turn on the switch Fig 9 After this procedure automatic ignition occurs whenever a hot water tap is opened First the pilot burner is lit and approximately four seconds afterwards the main burner The pilot burner flame is then extinguished after a short period of time This is a way of saving a great amount of energy as the pilot burner only operates for the minimum...
Page 6: ...aximum permissible pressure pw bar 12 12 12 Temperature selector in fully clockwise position Temperature rise C 50 50 50 Flow range l min 2 5 5 2 7 2 8 8 Minimum operating pressure pwmin bar 0 1 0 1 0 2 Minimum pressure for maximum flow bar 0 25 0 35 0 5 Temperature selector in fully anti clockwise position Temperature rise C 25 25 25 Flow range l min 4 11 4 14 4 17 6 Minimum operating pressure ba...
Page 7: ...ation pipe for combustion gases The gas heater must not be installed over a heat source To avoid corrosion the combustion air must be free from harmful substances Examples of particularly corrosive substances halogenated hydrocarbons contained in solvents paints glues engine gases and various domestic detergents If necessary take adequate measures Respect the minimum installation clearances indica...
Page 8: ...allation beforehand because the presence of dirt may reduce the flow and in extreme cases cause a blockage B Identify the cold water pipe Fig 5 item A and the hot water pipe Fig 5 item B so as to avoid any possible mis connection B Connect the water pipes to the water automatic using the provided connection accessories Fig 5 Water connection 3 5 Gas connection Any local by laws and regulations per...
Page 9: ...places for recycling Do not insert flat batteries Only use the type of batteries indicated 4 3 Before starting up the heater B Check if the gas indicated on the rating plate is the same as the one used at the location B Open the gas valve B Open the water valve 4 4 Turning the heater on and off Turning on B Press the switch position Fig 9 Green light on Main burner on i Open all water and gas bloc...
Page 10: ...Turn anti clockwise Increases flow and decreases water temperature Fig 13 B Turn clockwise Decreases flow and increases water temperature Regulating the temperature to the minimum required value reduces energy consumption as well as the pos sibility of limescale deposits in the heat exchanger Caution The temperature on the dis play is not precise always check before bathing children or elderly peo...
Page 11: ...rew B Open various hot water taps B Using the adjusting screw Fig 15 regulate the pressure until achieving the values indicated in the table 6 B Seal the adjusting screw once again Minimum gas flow adjustment 5 3 Conversion to a different type of gas Only use the original conversion kits The conversion must only be performed by a qualified technician The original conversion kits are supplied with ...
Page 12: ...he pilot burner B Remove and clean the pilot injector 6 2 Startup after maintenance work B Tighten all connections once more B Read chapter 4 Use and chapter 5 Adjustments 6 3 Heater purge In case of a frost risk proceed as follows B Remove the fixing lock from the filter screw cap no 1 situated in the water automatic B Remove the filter screw cap no 2 from the water automatic B Empty all the wate...
Page 13: ...e combustion gas probe proceed in the following manner B Remove the combustion gases evacuation pipe B Replace it with a pipe approximately 50 cm long blocked at one end B The pipe must be routed vertically B Turn on the heater at nominal power and with the temperature selector adjusted to maximum tempera ture In these conditions the heater must turn off two minutes afterwards at most Remove the p...
Page 14: ...chnician Vent the area Wait 10 minutes and restart the heater If the problem persists call a qualified technician Incorrect temperature informa tion in the appliance digital display Insuficient contact of the temperature sensor Check and correct the temperature sensor assembling Digital display shows E1 Water temperature sensor has tripped outlet water temperature above 85 C Reduce the water tempe...
