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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3A5416E
