7
H5-991-406A
Before Initial Start-Up
Before.you.start.the.pump,.be.sure.that:
•.. All.shut-off.valves.are.open,.and.the.pump.has.an.adequate.
supply.of.fluid.
•.. All.connections.are.tight.
•.. The.oil.level.is.approximately.1.in..(.5.cm).from.the.top.of.
the.fill.port.—.so.that.the.floor.of.the.upper.reservoir.within.
the.pump.housing.is.flooded.and.the.chamber.itself.is.about.
1/4.full,.allowing.for.oil.expansion.as.the.pump.runs.and.heats.
up.
•.. The.relief.valve.on.the.outlet.of.the.pump.is.adjusted.so.the.
pump.starts.under.minimum.pressure.
•.. All. pulleys. and. belts. are. properly. aligned,. and. belts. are.
tensioned.according.to.specification.
•.. ll.pulleys.and.belts.have.adequate.safety.guards.
Initial Start-Up Procedure
1... Turn.on.power.to.the.pump.motor.
...Check.the.inlet.pressure.or.vacuum..Inlet.vacuum.must.not.
exceed.7.in..Hg.at.70°.F.(180.mm.Hg.at.1°.C)..Inlet.pressure.
must.not.exceed.50.psi.(3.5.bar).
3.. .If.you.hear.any.erratic.noise.or.if.the.flow.is.unsteady,.refer.
to.the.Troubleshooting.Section.
4...If.the.system.has.an.air.lock.and.the.pump.fails.to.prime:
.
a..Turn.off.the.power.
.
b..Remove.the.drain.plug.(4).on.the.bottom.center.of.the.
manifold.
.
Note: Fluid may come out of this port when the plug
is removed. Provide an adequate catch basin for fluid
spillage, if required. Fluid will come out of this port
when the pump is started, so we recommend that you
attach adequate plumbing from this port so fluid will
not be sprayed or lost. Use high-pressure-rated hose
and fittings from this port. Take all safety precautions
to assure safe handling of the fluid being pumped.
.
c..Jog.the.system.on.and.off.until.the.fluid.coming.from.this.
port.is.air-free.
.
d..Turn.off.the.power.
.
e..Remove.the.plumbing.that.was.temporarily.installed,.and.
reinstall.the.drain.plug.(4).
5...Adjust. the. discharge. pressure. regulator. to. the. desired.
operating.and.bypass.pressures.
6...After.the.pressure.regulator.is.adjusted,.set.the.“pop-off”.
safety. relief. valve. at. 100. psi. (6.9. bar). higher. than. the.
desired.operating.pressure..To.verify.this.setting,.adjust.the.
discharge.pressure.regulator.upward.until.the.relief.valve.
opens.. Follow. the. recommendations. in. the. above. Note.
(Step.4b).for.handling.the.fluid.that.will.come.from.the.relief.
valve.
7... Reset.the.discharge.pressure.regulator.to.the.desired.system.
pressure.
8...Provide.a.return.line.from.the.relief.valve.to.the.supply.tank,.
similar.to.the.bypass.line.from.the.pressure.regulator.
H/G-25-SD Installation
The.smallest.permissible.discharge.hose.size.is:
1.to.10.gpm................................................ 11/16.(0.687).in..I.D.
11.to.0.gpm................................................................. 1.in..I.D.
1.to.38.liters/min....................................................... 17.mm.I.D.
39.to.76.liters/min.....................................................5.mm.I.D.
Use.flexible.hose.between.the.pump.and.hard.piping,.to.absorb.
vibration,.expansion,.or.contraction.
Never.install.a.shutoff.valve.in.the.discharge.line.between.the.
pump.and.the.regulator,.or.in.the.bypass.line.
Select.pipe.or.hose.with.a.working.pressure.rating.of.at.least.
1.5.times.the.maximum.system.pressure..Example:.Select.a.
300-psi.W.P.-rated.hose.for.systems.to.be.operated.at.00-
psi-gauge.pressure.
Support.the.pump.and.piping.independently.
These supports
are essential, because the manifold and inlet/outlet
adapters are plastic and more susceptible to damage.
Pressure Regulation
IInstall a pressure regulator or unloader in the discharge
line.
.Bypass.pressure.must.not.exceed.the.pressure.limit.of.
the.pump.
Size.the.regulator.so.that,.when.fully.open,.it.will.be.large.enough.
to.relieve.the.full.capacity.of.the.pump.without.overpressurizing.
the.system.
Locate.the.valve.as.close.to.the.pump.as.possible.and.ahead.
of.any.other.valves.
Adjust.the.pressure.regulating.valve.to.no.more.than.10%.over.
the.maximum.working.pressure.of.the.system..Do.not.exceed.
the.manufacturer’s.pressure.rating.for.the.pump.or.regulator.
Route.the.bypass.line.to.the.supply.tank,.or.to.the.suction.line.
as. far. as. possible. from. the. pump. (to. reduce. the. chance. of.
turbulence).
If.the.pump.will.be.operating.for.a.long.time.with.the.discharge.
closed.and.fluid.bypassing,.install.a.thermal.protector.set.to.
trip.at.10°.F.(49°.C).in.the.bypass.line.—.to.prevent.severe.
temperature.buildup.in.the.bypassed.fluid.
Caution: Never install shutoff valves in the bypass line or
between the pump and pressure regulator or relief valve.
Provide.for.permanent.or.temporary.installation.of.a.pressure.
gauge.to.monitor.the.discharge.pressure.at.the.pump.
For.additional.system.protection,.install.a.“pop-off”.safety.relief.
valve. in. the. discharge. line,. downstream. from. the. pressure.
regulator.
Always.tighten.all.piping.connections,.gauges,.and.regulators.
before.installing.the.piping.cluster.into.the.pump.manifold.
