Ransburg RMA Direct A12867 - Manual (Page 40)

RMA-303 Direct Charge - Installation
37 LN-9266-11.3
clamp (properly secured), by brazing or by
piercing the structural component enough to
assure connection. All ground connections
should be made to the most conductive metal-
lic structural ground available.
To be sure that everything is properly ground-
ed, the following steps should be undertaken
at least daily:
1. Inspect all ground wires. Look for good,
firm joints at all points of connection. Look
for breaks in the ground wire. Repair all
defects IMMEDIATELY!
2. Inspect the floor or grates for excessive
accumulation of dried coating material or
other residue. If there is any, remove it!
SAFE GROUNDING IS A MATTER OF
PROPER EQUIPMENT MAINTENANCE
AND INSTALLATION, CORRECT OPERA-
TION AND GOOD HOUSEKEEPING.
Daily
inspection of grounding apparatus and condi-
tions, however, will help prevent hazards that
are cause by normal operations.
BE SURE THAT:
1. All objects in the spray area are grounded.
2. Personnel in the spray area are properly
grounded. (Conductive safety shoes and
coveralls.)
3. That the target object is properly grounded
(less than 1 megohm resistance).
4. That the high voltage is off except during
normal application.
5. That the high voltage is off and applicators
are grounded during maintenance opera-
tions.
6. The spray area is kept free of accumulat-
ed coating deposits.
7. All combustible liquids in the spray area
(outside of automatic delivery systems)
are kept to minimum and are kept in fire
safe, grounded containers. (See NFPA-30
and chapter 6 of NFPA-33.)
8. Proper ventilation is provided.
9. Personnel must thoroughly understand the
equipment, its operation and maintenance,
and all safety precautions.
AIR HEATER REQUIREMENTS
Turbine drive air expands as it moves through
the turbine wheel cavity and as it exits the tur-
bine from the exhaust port. This expansion will
cause cooling of the exhaust air and the sur-
faces it contacts. This same expansion cool-
ing car occur across the shaping air exit ports.
This cooling affect can cause surface tempera-
tures to fall below the dew point of the booth,
which will result in condensation on the interior
and exterior of the atomizer, machine, and its
components. It is even possible that the tem-
perature of the supply air may be below the
booth dew point, even without additional ex-
pansion cooling.
Condensation is especially probable in water-
borne applications when booth temperature
and relative humidity levels are typically main-
tained very high. This condensation will allow
sufficient conductivity of the surfaces such that
they act as an erratic ground source potential.
This can cause damage to the equipment.
It is therefore, a requirement that turbine ex-
haust air temperature be maintained above the
booth dew point to prevent condensation from
forming on atomizer surfaces. Doing so will