Service.procedures; Important - DESA Heating Products BLP170VTA El Manual Del Propietario

OBSERVED PROBLEM
Heater. shuts. down. while.
running
WARNING: Use
only in areas free of
high dust content.
WARNING: Never service
heater while it is plugged in,
connected to propane supply,
operating or hot. Severe burns
and electrical shock can occur.
MOTOR
1.. With. heater. on. its. side,. remove. access.
panel.
2.. Access.ground.screw.through.underside.
of. heater. base.. Remove. ground. screw..
Disconnect.the.green.motor.wire.and.the.
green.power.cord.wire.from.underside.of.
shell.(see.Figure.5).
3.. Remove. two. black. wires. from. motor. to.
terminal.board.
4.. Carefully.push.motor.wires.through.hole.
in.bottom.of.shell.
5.. Remove.screws.holding.motor.mount.to.
shell..Use.nut-driver.(see.Figure.5).
6.. Carefully.pull.motor.and.fan.out.of.shell..
IMPORTANT:.Be.careful.not.to.damage.
fan..Do.not.set.motor.and.fan.down.with.
the.weight.resting.on.fan..This.could.dam-
age.fan.pitch..
7.. Use.hex.wrench.to.loosen.setscrew.which.
holds.fan.to.motor.shaft.
8.. Remove. fan.. Be. careful. not. to. damage.
the.fan.blade.pitch.
9.. Use. nut. driver. to. remove. two. nuts. that.
attach.motor.to.motor.mount.
10..Discard.old.motor.
8
trouBLesHooting
Continued
POSSIBLE CAUSE
1..Propane. supply. may. be.
inadequate
2..High. surrounding. air. tem-
perature. causing. thermal.
limit. device. to. shut. down.
heater
3. Restricted air flow
4..Damaged.fan
5..Excessive.dust.or.debris.in.
surrounding.area
serViCe ProCedures
www.desatech.com
REMEDY
1. A) Refill tank
. B).Provide.additional.and/or.
larger.tanks..See.Propane
Supply,.page.4
2..This.can.happen.when.running.
heater.in.temperatures.above.
85°.F.(29°.C)..Run.heater.in.
cooler.temperatures
3..Check.heater.inlet.and.outlet..
Remove.any.obstructions
4..Replace. fan.. See. Fan,.
page.9
5..Clean.heater..See.Mainte-
nance,.page.7
11..Attach. motor. to. motor. mount. with. two.
nuts. Tighten nuts firmly.
12..Replace. fan. on. motor. shaft.. Make. sure.
set screw contacts flat surface on motor
shaft.
13. Tighten set screw firmly (40-50 inch-
pounds.[46.08-57.60.kg-cm]).
14..Carefully.route.motor.wires.through.hole.in.
shell..Place.motor,.motor.mount..and.fan.
guard.into.rear.of.heater.shell,.as.shown.
in.Figure.5..
15..Insert. screws. through. heater. shell. and.
into motor mount. Tighten screws firmly.
16..Turn.heater.on.its.side.to.access.opening.
in.bottom.of.base..Connect.green.wires.
from.motor,.transformer..and.power.cord.
to.heater.shell.using.ground.nut.
17..Attach.two.black.wires.from.motor.to.ter-
minal.board.(see. Wiring Diagram,. page.
10,.for.correct.locations).
18..Replace.access.panel.
Figure 5 - Removing Motor and Fan
Guard from Heater (Heater may vary
from illustration)
Motor.and.
Fan.Guard
Screw
Screw
121232-01A