Harman Stove Company P61A-2 P61A-2!!Low!!Draft!!Voltage!!Adjustment

17
P61A!Pellet!Stove
These!units!are!pre-tested!at!the!factory!with!exactly
120!Volts!A.C.,!60!Hz.!They!are!checked!and!adjusted!!for
firebox!tightness,!gasket!leakage,!motor!operation!and!ignitor
operation.!!The!P61A!is!then!factory!set!at!a!mid-point
adjustment!and!in!most!cases!will!not!need!any!adjustments.
NOTE:!The!factory!low!draft!setting!may!not!be!correct
for!the!units!permanent!installation!conditions.
The!control!board!on!the!P61A!is!equipped!with!a
low!draft!adjustment!port.!!Located!on!the!control!face!just
to!the!right!of!the!igniter!light.!This!voltage!adjustment!is
provided!to!allow!the!unit!to!be!adjusted!for!the!household
voltage!where!the!unit!is!going!to!be!in!permaneant!operation.
NOTE:!The!line!voltage!varies!from!area!to!area!and!often
home!to!home.
The!low!draft!voltage!should!be!adjusted!to!achieve
the!most!efficient!burn!on!low!burn!or!"maintenance".!This
voltage!adjustment!allows!the!installer!to!change!the!low
voltage!set!point!approximately!10!volts.!!This!adjustment
should!be!done!by!the!installer!during!set!up!because!a!draft
meter!reading!is!required!to!insure!proper!set!up.
If!the!unit!is!not!!adjusted!properly,!it!does!not!cause
a!safety!concern.!If!the!unit!is!adjusted!too!high,!only!effiency
is!lost.!If!the!unit!is!adjusted!too!low,!the!low!draft!pressure
switch!will!not!allow!the!feeder!motor!or!the!igniter!to!operate.
Fig.1
Combustion
Motor!Speed
Control
Low!draft!only
set!point.
The!small!straight
screwdriver!slot!is
plastic;!therefore,
the!unit!can!be
adjusted!while!in
operation.
Fig.22 Fig.!23
A!simple!draft!test!should!be!performed!after
completing!the!flue!pipe!installation.!To!record!the!results!for
future!reference:
1.!!Plug!unit!into!a!120VAC,!60!HZ!outlet.
2.!!Close!the!hopper!lid,!front!view!door,!and!the!ash!pan.
Neither!pellets!or!a!fire!are!required!for!this!test.
3.!!With!the!mode!selector!in!the!"OFF"!position,!turn!the
feed!adjuster!to!"TEST".
4.!!Record!the!high!draft_____in!W.C.!(Normal!is!-.50!to!-
.60)!The!control!will!be!on!the!High!Draft!for!a!total!of!2
minutes.
5.!!After!2!minutes!is!up,!the!combustion!motor!will!go!down
to!low!draft!and!the!distribution!blower!will!go!on!high.!Allow
approximately!15!seconds!to!pass!for!the!combustion!motor
to!slow!before!checking!the!low!draft.
6.!!If!the!low!draft!is!between!-.35!and!-.45,!record!the
reading!_____!in!W.C.!!If!the!reading!is!higher,!slowly!turn
the!set!screw!counter-clockwise!until!the!draft!lowers.!If!the
reading!is!lower,!very!slowly!turn!the!set!screw!clockwise
until!the!draft!increases.
NOTE:!The!test!mode!alternates!from!high!to!low!draft
every!60!seconds.!If!more!time!is!needed!for!draft
adjustment,!wait!until!the!next!low!draft!cycle.
NOTE:!In!some!cases,!the!draft!may!not!go!as!low!as
-.35!to!-.45!even!with!the!set!screw!completely!counter-
clockwise.
Low!!Draft!!Voltage!!Adjustment
Draft!Meter!bolt
hole!location
On!a!P61A
the!draft!hole!is!under
the!left!rear!corner!of
the!firebox.
P61A-2!!Low!!Draft!!Voltage!!Adjustment