Harman Accentra Pellet Insert - Motor & Component Locations; Key Component Locations; Accentra Pellet Insert Safety Devices

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3-90-00674R28_12/13
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.
Accentra Insert Motor & Component Locations
Accentra Pellet Insert Safety Devices
Distribution Blower (under unit) See Fig. 10, Page 9.
Motor & Component Locations
The Hopper Lid Position Switchisfound
intherearcornerofthehopperopening.
If the hopper lid is not fully closed, the
switch opens, interrupting the power to
thefeedmotorandtheignitercircuits.This
preventspossibleinjuryfromreachinginto
thefeedermechanismduringoperation.
Hopper Lid Position Switch
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 MotorCombustion Motor
Silicone sponge docking gasket