ACV WaterMaster 25 Installation, Operation And Maintenance Instructions For The Installer And The User

Also see for WaterMaster 120: Installer's handbook

Contents

ACV WaterMaster 25 Installation, Operation And Maintenance Instructions For The Installer And The User Manual pdf 46 page image

DRAINING THE BOILEREssential recommendations for safety• Before draining the DHW tank, drain the heating (primary) circuit or bring itspressure to 0 bar.• Water flowing out of the drain valve may be extremely hot and could cause severescalding. Keep people away from the hot water discharge.Set-up conditions• Boiler switched off using the ON/OFFmaster switch• External power supply isolated• Fuel/gas supply closedHeating circuit draining procedure1. Close the isolating valves (1).2. Connect the drain valve (2) to the sewerwith a hose.3. Open the drain valve (2) to empty theheating circuit of the boiler.4. Close the drain valve (2) once the heatingcircuit of the boiler is empty.DHW circuit draining procedureBefore draining the DHW tank, make sure that the heating (primary) circuit pressure isnull.1. Open fully a draw-off tap (3) forabout 60 minutes to make sure thatthe DHW tank has cooled down.2. Close the isolating valves (1).3. Connect the drain valve (2) to thesewer with a hose.4. Open the drain valve (2) and drainthe DHW tank water to the sewer.5. Open the draw-off tap (3) toaccelerate the draining process.If it is located lower than the tankconnection, open a draw-off taplocated higher in the system.6. Close the drain valve (2) and thedraw-off tap (3) once the DHWtank of the boiler is empty.Cold waterHot water112123DRAINING THE WATER HEATEREssential recommendations for safety• Before draining the DHW tank, drain the primary circuit or bring its pressure to 0 bar.• Water flowing out of the drain valve may be extremely hot and could cause severescalding. Keep people away from the hot water discharge.Set-up conditions• Water heater switched off using the ON/OFF master switch• External power supply isolated• Gas supply closedPrimary circuit draining procedure1. Make sure the isolating valve (1) is closed.2. Connect the drain valve (2) to the sewer with ahose.3. Open the drain valve (2) to empty the primarycircuit of the water heater.4. Close the drain valve (2) once the primary circuitof the water heater is empty.12The drain valve is located underneath andthe front cover of the base needs to beremoved to get access to it.WaterMaster 25 - 35 - 45 - 70 - 85 - 120 : A1006482 - 664Y7300 • Den44ENFRNLESITDEPLRUMAINTENANCEREMOVAL AND INSTALLATION OF THE BURNERSet-up conditions• Water heater shut down• External power supply isolated• Gas supply closed• Front and top panels removed (refer to “Removal and Installation of the Front and Top Panels” onpage 39).• Electrode removed or electrode grounding cable and ignition cable disconnected (refer to “Removal,Check and Installation of the Burner Electrode” on page 46) .Removal procedure1. Disconnect all plugs from the fan assembly (10) and the gas valve (2) and any grounding cable, asrequired.2. Disconnect the air inlet elbow (3).3. Release the gas connection (1).4. Using a socket wrench, release the burner hood (9) attaching hex. screws and retain them for rein-stallation.5. Lift the burner assembly and pull it out of the exchanger.6. If required, clean the exchanger, see “Cleaning the Exchanger” on page 46.7. If not removed previously, remove, check and reinstall the electrode, refer to “Removal, Check andInstallation of the Burner Electrode” on page 46.Installation procedure1. Reinstall the burner assembly with its insulation block into the exchanger.2. Install the retaining screws of the burner hood (9) and fasten them in a crosswise pattern at therequired tightening torque (refer to “Torque Values” on page 46).3. Reconnect the gas connection (1).When connecting the air inlet, make sure that the check valve (4) is correctly located at theelbow (3) end.4. Reconnect the air inlet elbow (3).5. Reconnect the plugs to the gas valve (2) and the fan assembly (10), and any disconnected ground-ing cable.Follow-on tasks1. Install the electrode, or reconnect the electrode grounding cable and ignition cable, as required.Refer to “Removal, Check and Installation of the Burner Electrode” on page 46.