TURBOmax VUW 282 E - Heatingspares247.com

5.9 Adjusting the centralheating output(range rating)The TURBOmax is fully modulating forcentral heating, and it is therefore notnecessary to range rate the centralheating. However, if desired, it ispossible to range rate the boiler, asfollows:• Remove screw (1, fig. 38) andlower control panel.• Slacken the sealing screw andattach one arm of a U gauge tothe burner pressure test point (1,fig.37). Remove plastic sealingplug and connect the other arm tothe combustion chamber sensingtube (2, fig.37).• Remove screw (1, fig. 39) andremove terminal box cover toaccess the range ratingpotentiometer (2, fig. 40) beneath.• Operate the central heating byturning the central heating controlto the 'Heating and Hot Water'position () ensuring that theexternal controls are calling forheat and the maximum radiatortemperature control is set to 9.• The central heating output can nowbe altered by inserting anelectricians screwdriver into thepotentiometer (2, fig. 40)• Turn the potentiometer fullyanticlockwise to the stop.• Slowly turn the potentiometerclockwise, whilst observing the Ugauge.• Stop turning the potentiometer whenthe burner pressure is at the correctsetting for the output required (seetable 5).• Turn the boiler off.• Remove U gauge. Tighten thesealing screw, (1, fig. 36) and testfor soundness.• Refit plastic plug in chambersensing tube.• After setting, refit cover screw (1,fig. 39) and re-secure control panel(1, fig. 38).fig. 38T a b l e 5 : C e n t r a l H e aOutput toRange rating mbarcentral Heatingmbar VUW 242 VUW 28228.0 (95,560) - 10,624.0 (81,900) 10,0 8,021.0 (71,700) 8,0 6,318.0 (61,500) 6,1 4,815.0 (51,200) 4,5 3,412.0 (41,000) 3,1 2,2min. 9,6 (32,800) 2,0 -min. 11,2 (38,240) - 2,0GW 603/0fig. 39fig. 40GW 614/0GW 638/0-B26