308-385
15
Installation
Check the Electrical Grounding (See Fig. 10)
FIRE, EXPLOSION, AND
ELECTRIC SHOCK HAZARD
Megohmmeter P/N 218–979 (WW-see
Fig. 10) is not approved for use in a haz-
ardous area. To reduce the risk of spark-
ing, do not use the megohmmeter to
check electrical grounding unless:
All spraying devices in the hazardous
area are turned off.
Ventilation fans in the hazardous
area are operating.
There are no flammable vapors in the area,
such as open solvent containers or fumes from
spraying.
Failure to follow this warning could cause fire,
explosion, electric shock and result in serious injury
and property damage.
WARNING
1. Have a qualified electrician check the electrical
grounding continuity of the spray gun and turbine
air hose.
2. Make sure the
turbine air hose (B) is connected
and the hose ground wire is connected to a true
earth ground.
3. The air and fluid supplies to the gun must be
turned off, and the fluid hose must not have any
fluid in it when checking the continuity.
4. Measure the resistance between the turbine air
inlet fitting (TA) and a true earth ground (N).
a.
If using a black or grey turbine air hose, use a
megohmmeter (WW) to measure the
resistance. Use an applied voltage of 500 mini-
mum to 1000 volts maximum. Resistance
should not exceed 2 megohms.
b.
If you are using a red turbine air hose, use an
ohmmeter to measure the resistance.
Resistance should not exceed 100 ohms.
5. If the resistance is greater than the maximum
reading specified above for your hose, check the
tightness of the ground connections and be sure
the turbine air hose ground wire is connected to a
true earth ground. If the resistance is still too high,
replace the turbine air hose.
03214
Fig. 10
WW
N
B
TA
