HM7000 and HU2000
Operation (Cont.)
Before each start-up operating procedure
1.Turn regulator knob fully counter clockwise (to the left) to close air flow.
2.Connect air hose to outlet of regulator.
3.Turn On/Off switch to OFF position.
4.Plug in power cord.
5.Turn On/Off switch to ON position and let compressor run until it reaches automatic shutoff pressure.
6.Attach tire chuck or tool to end of hose.
7.Turn regulator knob clockwise (to the right) to desired pressure of tool being used.
On/Off cycling of compressor
In the ON position, the compressor pumps air into the tank. When a
If the compressor is left in the ON position and air is depleted from the tank by use of a tire chuck, tool, etc., the compressor will restart automatically at its preset
In the OFF position, the pressure switch cannot function and the compressor will not operate. Make sure switch
is in OFF position when connecting or disconnecting power cord from electrical outlet.
ASME Safety Valve
Do not remove or attempt to adjust
the safety valve!
Check the safety valve by performing the following steps:
1.Plug the compressor in and run until shut off pressure is reached (see Operating Procedure).
2.Wearing safety glasses, pull the ring on the safety valve (see Figure 6) to release pressure from compressor tank. Use your other hand to deflect
Figure 6
3.The safety valve should automatically close at approximately
Safety valve must be replaced if it
cannot be actuated or it leaks air after ring is released.
pressure gaugeS
Gauge attached to regulator indicates air pressure going to hose (and any tool attached to end of hose).
Gauge attached to pressure switch indicates air pressure in tank.
Maintenance
Release all pressure and disconnect
power before making any repair.
1.Check compressor for any visible problems, especially check air filter to be sure it is clean.
2.Pull ring on safety valve and allow it to snap back to normal position (Figure 6).
Safety valve must be replaced if it
cannot be actuated or it leaks air after ring is released.
3.Daily with compressor shut off: Depressurize system prior to draining tank. Drain moisture from tanks by opening drain cocks on the side or underneath end of tank.
NOTE: Drain cup should be emptied regularly.
Do not remove drain plug with tank under pressure.
Figure 7
4.Turn power OFF and clean dust and dirt from motor, tank, air lines and pump cooling fins.
NOTE: The air filter in the filter housing on the side of the head must be checked and cleaned periodically, more often if used under very dusty conditions or when a great deal of fog from spraying is allowed to circulate near unit.
Important: Unit should be located as far from spraying area as hose will allow to prevent
Filter removal, inspection and replacement
To change a filter, pull off the filter housing cover. If filter element is dirty, rotate filter cover so the holes line up with clean element material and snap cover onto housing. If filter element has no clean areas, replace element or entire filter.
Lubrication
This is an oilless type compressor requiring no lubrication.
Thermal overload protector
Turn off the pressure switch or unplug compressor for 20 minutes and allow it to cool. Reset the unit. Switch unit to OFF and turn ON again to resume work.
This compressor is equipped with a
manual reset thermal overload protector which will shut off motor if it becomes overheated.
If thermal overload protector shuts motor off frequently look for the following causes.
1.Low voltage.
2.Wrong gauge wire or length of extension cord.
3.Clogged air filter.
4.Lack of proper ventilation.
The motor must be allowed to cool
down before
Storage
1.When not in use, hose and compressor should be stored in a cool dry place.
2.Tank should be drained of moisture.
3.Hose should be disconnected and hung open ends down to allow any moisture to drain.
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