Heatcraft Refrigeration Products H-IM-77D - Manual (Page 2)

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Inspection
When.the.equipment.is.received,.all.items.should.be.carefully.checked.against.
the.bill.of.lading.to.make.sure.all.crates.and.cartons.have.been.received...All.
units.should.be.carefully.inspected.for.hidden.damage.when.received...If.any.
damage.is.found,.it.should.be.reported.to.the.carrier.immediately.and.a.claim.
should.be.filed...The.unit.nameplate.should.be.checked.to.make.sure.that.the.
voltage.agrees.with.the.power.supply.available.
Expansion Valve
Install.expansion.valve.and.feeler.bulb.inside.cabinet.of.the.unit..
Recommended.valve.sizes.are.given.for.each.product.family.
Installation
Installation.and.service.of.this.equipment.should.be.performed.only.by.
qualified.and.experienced.commercial.refrigeration.mechanics..Correct.
application.and.installation.of.this.equipment.is.necessary.to.obtain.
optimum.performance.and.customer.satisfaction..Install.all.equipment,.
piping.and.electrical.in.accordance.with.local.and.national.codes.and.
in.conformance.with.good.practice.required.for.proper.operation..Work.
safely!.Prevent.accidents!
The.final.step.in.any.installation.is.to.instruct.the.customer.or.user.in.the.
operation.of.the.equipment..The.customer.should.be.shown.how.the.
equipment.can.be.made.to.operate.properly.and.efficiently..Maintenance.
requirements.should.be.explained.
Drain Line
After.installing.the.fan.panel.assembly,.connect.the.drain.line.to.the.fitting.
provided.on.the.unit..A.plastic.hose.or.metal.drain.line.can.be.used.
The.drain.line.should.be.pitched.sharply.and.exit.the.cabinet.as.quickly.as.
possible..Traps.in.the.drain.line.should.be.located.in.a.warm.ambient.to.
prevent.freeze-up.
If.only.a.small.portion.of.the.drain.line.is.located.in.the.refrigerated.area,.
a.drain.line.heater.will.not.be.required...If.a.drain.line.heater.is.required,.
use.approximately.15.watts.per.foot.of.pipe...Connect.the.heater.wire.to.
the.terminals.of.the.heater.circuit.(N.and.3).at.the.terminal.block.in.the.
junction.box...The.heater.will.then.operate.during.the.defrost.cycle.
All.condensate.water.must.be.disposed.of.properly.and.should.not.be.
allowed.to.accumulate.or.cause.a.safety.hazard.
General Information
Motors
Motors.are.lifetime.lubricated.and.thermally.protected..Check.an.
inoperative.motor.by.disconnecting.and.applying.correct.voltage.across.
leads...If.test.fails,.replace.the.motor.
Wiring
The.nameplate.on.the.unit.is.marked.with.the.electrical.characteristics.to.
be.used.for.wiring.the.unit...The.unit.must.be.grounded..All.wiring.should.
be.done.in.accordance.with.applicable.national.and.local.codes.
Maintenance
Periodically.inspect.unit.for.grease.and.soil.accumulation...Clean.with.
warm.water.and.soap...Do.not.use.cleaners.containing.ammonia..Inspect.
the.drain.pan/fan.panel.occasionally.for.proper.condensate.drainage...
Keep.the.drain.opening.clean.
Timer
If.the.system.does.not.go.through.its.proper.sequence.,.check.timer.
operation.through.a.defrost.cycle..Check.for.loose.wires.or..terminals..
Before.replacing.timer,.check.other.components.
Operation of Paragon Timer
To.set.time.of.day.grasp.knob.which.is.in.the.center.of.the.inner.(fail-safe).
dial.and.rotate.it.in.a.counter-clockwise.direction...This.will.cause.the.
outer.(24.hour).dial.to.revolve...Line.up.the.correct.time.of.day.on.the.
outer.dial.with.the.time.pointer...Do.not.try.to.set.the.time.control.by.
grasping.the.other.(24.hour).dial...Place.pins.in.the.outer.dial.at.the.time.of.
day.that.defrost.is.required.
Operation of Grasslin Timer
To.set.the.time,.turn.the.minute.hand.clockwise.until.the.time.of.day.(and.
AM.or.PM).on.the.outer.dial.is.aligned.with.the.triangle.marker.on.the.
inner.dial..Do.not.rotate.minute.hand.counter-clockwise..Move.the.white.
tab.(tripper).on.the.outer.dial.outward.at.each.desired.initiation.time..
Each.white.tab.(tripper).is.a.15.minute.interval.and.provides.15.minutes.
of.defrost..For.longer.defrost.duration,.move.additional.tabs.(following.in.
time).from.the.initiation.tab..For.example,.if.a.45.minute.defrost.is.to.start.
at.7:00.AM,.move.the.tabs.outward.that.lie.between.7:00.-.7:15,.7:15.-.7:30.
and.7:30.-.7:45.on.the.AM.side.of.the.dial..The.defrost.will.initiate.at.7:00.
AM.and.time.terminate.at.7:45.AM.(if.temperature.termination.does.not.
occur.first).
Fan Motor
If.the.motor.does.not.operate.or.it.cycles.on.thermal.overload,.remove.
motor.leads.from.terminal.block.and.apply.correct.voltage.across.the.
leads...If.motor.still.does.not.operate.satisfactorily,.it.must.be.replaced...
Before.starting.the.unit,.rotate.fan.blades.to.make.sure.they.turn.freely.
and.have.sufficient.clearance.
Fan Delay & Defrost Termination Control
This.control.is.a.single.pole.double.throw.switch...The.red.lead.wire.
is.wired.to.common...The.black.wire.is.wired.in.series.with.the.fan.
motors...The.brown.wire.is.wired.in.series.with.the.defrost.termination.
solenoid.in.the.timer...The.brown.and.red.contacts.close.and.the.black.
and.red.contacts.open.when.the.temperature.is.above.55 º F...The.black.
and.red.contacts.close.and.the.brown.and.red.contacts.open.when.the.
temperature.is.below.35 º F.
On.initial.“pull.down”.of.a.warm.box.the.fan.will.not.start.until.the.coil.
temperature.reaches.approximately.35 º F...If.the.box.is.still.comparatively.
warm.(60 º F).when.the.fan.starts,.then.blowing.this.warm.air.over.the.coil.
may.cause.it.to.warm.up.to.55 º F.and.thus.stop.the.fan...Therefore,.the.fan.
may.recycle.on.initial.“pull.down.”..This.control.cannot.be.adjusted.
If.the.fan.motor.fails.to.start.when.the.control.is.below.35 º F,.disconnect.
the.fan.motor.leads.and.check.the.motor.as.described.for.fan.motors...Also.
check.whether.current.is.being.supplied.at.“N”.and.“4”.from.the.timer...The.
fan.delay.control.must.be.below.35 º F.when.checking.for.a.closed.circuit.
Defrost Heater
If.unit.shows.very.little.or.no.defrosting.and.does.not.heat,.disconnect.
heater.and.check.to.find.if.it.is.burned.out...To.test,.apply.correct.voltage.
across.heater.or.use.continuity.flashlight.battery.tester.
Drain Pan
If.drain.pan.has.an.ice.build-up,.drain.line.may.be.frozen...The.drain.
line.should.be.pitched.sharply.and.exit.cabinet.as.quickly.as.possible...
Sometimes.location.and.ambient.at.the.drain.outside.of.cabinet.may.
cause.freeze-up...A.drain.line.heater.may.be.required.to.correct.the.freeze-
up...Any.traps.in.the.drain.line.must.be.located.in.a.warm.ambient.
ELECTRIC DEFROST TROUBLESHOOTING
NOTE: .. Installation.and.maintenance.are.to.be.performed.only.by.
qualified.personnel.who.are.familiar.with.local.codes.and.regulations,.
and.experienced.with.this.type.of.equipment.
CAUTION: ..
Sharp.edges.and.coil.surfaces.are.a.potential.injury.
hazard..Avoid.contact..with.them.
WARNING:..
..Refrigerant.can.be.harmful.if.it.is.inhaled..Refrigerant.
must.be.used.and.recovered.responsibly..Failure.to.follow.this.warning.
may.result.in.personal.injury.or.death.
WARNING:.
.All.power.must.be.disconnected.before.cleaning.
drain.pan/fan.panel..It.serves.as.a.cover.of.hazardous.moving.parts..
Operation.of.unit.without.pan.in.place.constitutes.a.hazard.
NOTE:
After.correcting.faulty.condition.it.is.essential.that.the.coil.
and.unit.be.free.of.ice.before.placing.unit.back.on.automatic.operation.