Harman PB105 - Low Water Cut-Off Control Tip Connection (Lwco)

22
3-90-07205R26_10/14
Lowwatercut-offcontrolLWCOWiringInstructions
TO BE USED WHERE REQUIRED BY LOCAL CODES
Read and follow the instructions provided with the specic LWCO Control selected.
TheLWCOControlwillprovideasetofcontactsthatareclosedwhenwaterispresentatthesensor.Itwillopenthefeed
motorcircuitwhenalowwaterconditionexist.
Dependingonthemodelselected,amanualresetofthecontrolmayberequiredafteralowwaterconditionhasexisted.
• WARNING: To prevent electrical shock or equipment damage, make sure power is turned off to the boiler.
• Locatetheblackwirefromthewiringharnessthatconnectstothefeedmotor.Fig.1
• Separatetheblackwiresatthe¼”pushonconnectorsforthefeedmotor.Fig.2&Fig.3
• Themaleconnectorwillbeonthewiringharnessandthefemaleconnectorwillbeonthefeedmotorwire.Fig.3&
 Fig.4.
Fig. 1 Fig. 2 Fig. 3
• WiretheLWCOcontrolcontactsinserieswiththefeedmotoronthepelletboiler.Fig.4
• Aseparatepower sourcemay berequiredfor theLWCOcontrol.Read andfollowthe instructionsprovidedwith the
specicLWCOcontrolselected.
• ConsiderationmustbegiventoalllocalcodesandregulationsregardingtheproperinstallationoftheLWCOcontrol
deviceandassociatedwiring.
Note: Always verify proper operation of control after installation
Fig. 4
LWCO Control Contacts. (Open contact circuit
when low water condition exists.)