Harman P43 - Service Parts

Harman® • P-Series Owner’s Manual_R1 • 03/1427 3-90-436168c
The Low Draft Pressure Switchisadifferentialpressureswitch
that monitors the negative pressure (Draft) in the rebox. If the
draftbecomestoo low forpropercombustion,the switch opens,
cuttingpowertothefeedmotorandtheignitercircuits.Thisswitch
isconnectedintotheAC(highvoltage)wiring.
The Control Board/ESP combination is responsible for all high
limitsafetycontrol.Thereare2highlimits,onenormaloperation
highlimitandonebackuphighlimit.Thecontrolhasanautomatic
diagnosticcircuitthatcontinuouslymonitorstheESPand Room
Sensorforfaults.Ifafaultshouldoccur,thecontrolsendsastatus
alertandatthesametimetheunitgoesdowntominimumfeed/
minimumburnasasafetycondition.
Backdraft Damper Assembly
Always check to see if the damper
plate swings freely inward and that
the seating edges are not covered
withdirtorlint.
LowDraftPressureSwitch
FeedMotor
CombustionMotor
B. Motor and Component Location
P-Series Pellet Stove Safety Devices
DistributionBlower