Harman P43 - Motor and Component Location

Harman® • P-Series Owner’s Manual_R10 • 2014 - ___ • 11/1525 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