Pressure test
Allfusionjointsmustcooloffcompletelybeforethe
pressuretestcommences.Asarule,awaiting
periodofat least 1 hourshouldbeobservedafter
completionofthelastfusionjointingoperation.
Operation of the HWSG-3 electrofusion unit
Thefollowingconditionsmustbefulfilledfor
faultfreeoperationofthefusionjointingunit:
mainsvoltage min.185 V max. 264 V
mainsfrequency min.47 Hzmax.65 Hz
temperature min.–15°Cmax.40°C
Theselevelsareverifiedcontinuouslybythefusion
unitduringthefusionjointingoperation.Inthe
eventofvariationsthefusionprocessisinterrupted
and the Faultpilotlampflashes.
Fusion check
Avisualcheckthatfusionhastakenplaceis
providedbytheemergenceofapinofmaterial.
Connectthefusionunittothemainspowersupply.
Insertfusioncableinfittingorfittings.
Startthefusionoperationbypressingthe
STARTbutton.
Pipeoutside FusiontimeCoolingtime
diameter
d t t1
mm Sekunden Minuten
16 37 2
20 47 2
25 55 2
32 70 4
40 120 4
50 145 4
63 180 6
75 185 6
90 200 6
110 210 6
Duringthefusionjointingoperationthecomponents
beingjoined–thefittingandthepipe–mustonly
besubjectedtotheloadsarisingduringnormal
installationaccordingtoinstructions(linefixing).
Cooling time:
Thefusionjointedcomponents(fittingandpipe)
mustnotbesubjectedtothestrainoffurther
installationworkuntilthecoolingtimehasexpired.