Installation
Installation
Installation
All electrical wiring must be done by a
qualified electrician and comply with all local
codes and regulations.
General
General
General Information
Information
Information
Reference letters in the text—for example,
(A)—refer to the callouts in the figures.
The STU System consists of stationary parts
and parts attached to the air cylinder center
shafts. The parts, such as the pumps and plate,
attached to the air cylinder center shafts will
raise and lower (move) during normal operation.
These moving parts comprise the ram.
Installation will involve attaching air lines
between various system components. Refer to
Controls and Connections, page 17
for details
regarding those air line connections from the
control panel.
Ground
Ground
Ground the
the
the System
System
System
The equipment must be grounded to reduce
the risk of static sparking and electrical shock.
Electric or static sparking can cause fumes to
ignite or explode. Improper grounding can
cause electric shock. Grounding provides an
escape wire for the electric current.
Before operating the pump, ground the system
as explained below.
• Electro-pneumatic
Electro-pneumatic
Electro-pneumatic control
control
control panel:
panel:
panel: If installed,
it is grounded through the grounding
conductor of the incoming power wiring.
• Pump:
Pump:
Pump: The pumps are grounded by the metal
components being attached to the STU.
• Air
Air
Air and
and
and fluid
fluid
fluid hoses:
hoses:
hoses: Use only grounded hoses
with a maximum of 500 ft (150 m) combined
hose length to ensure grounding continuity.
Check electrical resistance of hoses. If total
resistance to ground exceeds 29 megohms,
replace hose immediately.
• Dispense
Dispense
Dispense valve:
valve:
valve: ground through connection to
a properly grounded fluid hose and pump.
• Fluid
Fluid
Fluid supply
supply
supply container:
container:
container: Follow local code.
• Solvent
Solvent
Solvent containers
containers
containers used
used
used when
when
when flushing:
flushing:
flushing:
Follow local code. Use only conductive metal
containers, placed on a grounded surface. Do
not place the container on a non-conductive
surface, such as paper or cardboard, which
interrupts grounding continuity.
• STU:
STU:
STU: If using the electro-pneumatic control
panel, the STU is grounded by the ground
wire in the electrical connection to the panel.
If using the pneumatic control panel, the user
must attach a ground wire between the STU
and earth ground. Ground wire 237686 is
available separately.
Check your system electrical continuity after
the initial installation, and then set up a regular
schedule for checking continuity to be sure
proper grounding is maintained. The resistance
should not exceed 1 ohm.
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3A5416L
