Maintenance start up, Operation 3 – Gast 0740 Series Oilless Vacuum Pumps and Comressors User Manual
Page 3
MAINTENANCE
Start Up
If motor fails to start or slows down significantly under
load, shut off and disconnect from power supply. Check
that the voltage is correct for motor and that motor is
turning in the proper direction. Vane life will be drastical-
ly reduced if motor is not operating properly. Vanes can
break or be damaged if motor/pump runs in the wrong
direction.
OPERATION
3
Check with a qualified electrician or serviceman if the
grounding instructions are not completely understood,
or if you are not sure whether the product is properly
grounded. Do not modify the plug provided. If it will not
fit the outlet, have the proper outlet installed by a quali-
fied electrician.
Model that is permanently wired:
This product must be connected to a grounded, metal-
lic, permanent wiring system, or an equipment ground-
ing terminal or lead on the product.
Power supply wiring must conform to all required safety
codes and be installed by a qualified person. Check
that supply voltage agrees with that listed on product
nameplate.
Be sure the 3-phase motor turns in the proper direction
of rotation after installation. Turning in the wrong direc-
tion will drastically reduce vane life.
Extension cords:
Use only a 3-wire extension cord that has a 3-blade
grounding plug. Connect extension cord plug to a
matching 3-slot receptacle. Do not use an adapter.
Make sure your extension cord is in good condition.
Check that the gage wire of the extension cord is the
correct size wire to carry the current this product will
draw.
Minimum gage for extension cords
Amps
Volts
Length of cord in feet
120v
25 50
100 150 200 250 300 400 500
240v
50 100 200 300 400 500 600 800 1000
0-2
18 18
18
16
16
14
14
12
12
2-3
18 18
16
14
14
12
12
10
10
3-4
18 18
16
14
12
12
10
10
8
4-5
18 18
14
12
12
10
10
8
8
5-6
18 16
14
12
10
10
8
8
8
6-8
18 16
12
10
10
8
6
6
6
8-10
18 14
12
10
8
8
6
6
4
10-12
16 14
10
8
8
6
6
4
4
12-14
16 12
10
8
6
6
6
4
2
14-16
16 12
10
8
6
6
4
4
2
16-18
14 12
8
8
6
4
4
2
2
18-20
14 12
8
6
6
4
4
2
2
It is your responsibility to operate this product at recom-
mended pressures or vacuum duties and room ambient
temperatures. Do Not start against a vacuum or pres-
sure load.