Graco PR70 Operation & Maintenance Manual page 8

Installation
4. Ground the System.
The equipment must be grounded to reduce the risk of
static sparking and electric 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.
Control enclosure and Pump: grounded through power
cord. See Connect Electrical Cord.
Fluid supply container: follow local code.
Solvent pails used when flushing: follow local code. Use
only conductive metal pails, placed on a grounded sur-
face. Do not place the pail on a nonconductive surface,
such as paper or cardboard, which interrupts grounding
continuity.
To maintain grounding continuity when flushing or
relieving pressure: hold metal part of the spray gun/dis-
pense valve firmly to the side of a grounded metal pail,
then trigger the gun/valve.
5. Connect Air (if applicable for MD2 valve).
If the system requires air to open and close a dispense
valve, connect a compressed airline to the inlet found in
the rear of machine.
8
6. Connect the Dispense hoses.
Connect the heated hoses to the outlets of the pumps.
Plug the heater connections into the proper outlets on
the control panel.
NOTE: The non-drip valves on the ends of the hoses
are different diameters and only plug into the over /
under block in one location.
11/16 Dia. Non
Drip Valve
02/0707-00/50
5/8 Dia. Non Drip
Valve
U81744
Flush Hookup
1/4 NPT male
7. Connect the Over / Under Block, U81923 Only.
Connect the other ends of the heated hoses with the
non-drip valve fittings into the over / under block. Plug
the over / under block heater with probe and mixer
heater with probe into the proper outlets on the panel.
Connect the pressure transducer and mixed material
temperature probe connections into the proper outlets
on the panel.
8. Flush the System.
The machine is tested at the factory with mineral oil.
Flush the machine before the first use.
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