heat-timer EPU-D - Heating System Sensor Installation

InstallationInstructions13
059840‐00Rev.AHeat‐TimerCorp.
HeatingSystemSensorInstallation
Considerthefollowingwheninstallingtheheatingsystemsensor:
• Onlyusethesensorprovidedwiththecontrol.
• Theideallocationfortheheatingsystemsensor
isonthefurthestradiatorinthesystem.This
radiatorisusuallythehardesttoheat.
• Thesensormaybelocatedonthefurthest
returnriser.However,thesensorMUSTbeabove
theboilerwaterline(onadryreturn).See
“PipingDiagrams”onpage 38.
• Straptheheatingsystemsensortothepipe
usingthetie‐wrapsprovidedwiththesensor.
Thenwrapinsulationaroundthesensorand
pipetoachievethehighestaccuracy.
• Thesensorwirescanbeextendedupto500feet(152.4meters)usingshielded2‐conductor(#18/2)cable
(HeatTimerp/n703001‐01).
• Donotconnecttheshieldatthesensor.However,connecttheshieldatthecontrol.See“Wiringthe
HeatingSystemSensor”onpage 18.
CAUTION
Determiningtheproperlocationfortheheatingsystemsensorisveryimportant.Iftheheating
systemsensorcannotsensethesystemisfullofsteam,theEPU‐Dwillnotprovidecomfortable
heatlevels.Besuretheheatingsystemsensorislocatedonaproperlyventedpipethatcannot
easilybeisolatedfromthesystem.
NEVERinstalltheheatingsystemsensorbetweenthecondensatereceiverandtheboiler.