Gast R7100R-50 - Manual (Page 3)

3
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CAUTION Outlet piping can burn skin. Guard or
limit access. Mark “CAUTION Hot
Surface. Can Cause Burns.”
Air temperature increases when passing through the
blower. When run at duties above 50 in. H
2
0, metal
pipe may be required for hot exhaust air. The blower
must not be operated above the limits for continuous
duty. Only models R3105N-50, R4110N-50 and
R4310P-50 can be operated continuously with no air
flowing through the blower. Other units can only be run
at the rating shown on the model number label. Do not
close off inlet (for vacuum) to reduce extra air flow. This
will cause added heat and motor load. Blower exhaust
air in excess of 230
0 F indicates operation in excess of
rating which can cause the blower to fail.
____________________________________________
ACCESSORIES
Gast pressure gauge AJ496 and vacuum gauges AJ497 or
AE134 show blower duty. The Gast pressure/vacuum relief
valve, AG258 will limit the operating duty by admitting or
relieving air. It also allows full flow through the blower
when the relief valve closes.
SERVICING
ƽ
WARNING To retain their sealed construction
they should be serviced by Gast
authorized service centers ONLY.
These models are sealed at the
factory for very low leakage.
ƽ
WARNING Turn off electric power before
removing blower from service. Be
sure rotating parts have stopped.
Electric shock or severe cuts can
result.
Inlet and exhaust filters attached to the blower may
need cleaning or replacement of the elements.
Failure to do so will result in more pressure drop,
reduced air flow and hotter operation of the blower.
The outside of the unit requires cleaning of dust
and dirt. The inside of the blower also may need
cleaning to remove foreign material coating the
impeller and housing. This should be done at a
Gast Authorized Service Center. This buildup can
cause vibration, failure of the motor to operate or
reduced flow.
Motor Wiring Diaphragm for R4110N-50 & R3105N-50
>>* WARNING
This motor is thermally protected and will
automatically restart when protector resets.
Always disconnect power supply before
servicing.
Motor Wiring Diaphragm for R4310P-50
>>* WARNING
This motor is thermally protected and will
automatically restart when protector resets.
Always disconnect power supply before
servicing.
To reverse rotation, interchange
the external connections to any
two leads.
Motor Wiring Diaphragm for R5325R-50, R6340R-50, R6P355R-50 & R7100R-50
To reverse rotation, interchange
the external connections to any
two leads.