TURBOmax VUW 282 E - Heatingspares247.com

3.7.2 Filling and make upThe system should be filled with watervia a separate filling point fitted at aconvenient position on the heatingcircuit. Where local Water AuthorityRegulation allows, a temporaryconnection to the mains may be used(fig. 6). The connection must beremoved when filling is completed.Where local Water AuthorityRegulation does not allow temporaryconnection, a sealed system fillerpump with break tank must be used.The heating system will not be filledautomatically from the domestic hotwater side.(Alternative methods of filling sealedsystems are given in BS 5449).fig. 6HeatingcircuitreturnStopvalveDouble checkvalve assemblyTestvalveHoseunionsTemporaryHoseMainswatersupplyGW 400/03.7.3 Pressure relief valveA pressure relief valve is providedready assembled within the boiler(5, fig. 7). This safety device isrequired on all sealed C.H. systemsand is pre-set at 3 bar and providedwith a 3/4 in. BSP connection for adischarge pipe, which must be of noless than 15mm diameter.3.7.4 Pressure and temperature gaugeThis is factory fitted to the boiler andindicates the primary circuit pressureto facilitate filling and testing, as wellas showing the temperature of thecentral heating system water.fig. 7GW 609/011