Owner's manual

6
Installation
Tightening Threaded Fasteners Before
First Use
After unpacking the pump, and before using it for the first
time, check and retorque all external fasteners. See the
Service section for torque specifications. After the first day
of operation, retorque the fasteners again. Although pump
use varies, a general guideline is to retorque fasteners every
two months.
Use a compatible thread sealant on all male threads.
Tighten all connections firmly to avoid air or fluid leaks.
CAUTION
To avoid pump damage, do not overtighten the fittings
to the pump.
Grounding
WARNING
FIRE AND EXPLOSION HAZARD
This pump must be grounded when using
flammables. Before operating the pump,
ground the system as explained below. Also
read the section Fire and Explosion
Hazard on page 3.
When pumping conductive flammable fluids, always
ground the entire fluid system by making sure the fluid
system has an electrical path to a true earth ground (see
Fig. 2). Never use a polypropylene pump with non-con-
ductive flammable fluids as specified by your local fire
protection code.
US Code (NFPA 77 Static Electricity) recommends a
conductivity greater than 50 x 10
–12
Siemans/meter
(mhos/meter) over your operating temperature range to
reduce the hazard of fire. Consult your fluid supplier to
determine the conductivity or resistivity of your fluid.
The resistivity must be less than 2 x 10
12
ohm-centime-
ters.
To reduce the risk of static sparking, ground the pump and
all other equipment used or located in the pumping area.
Check your local electrical code for detailed grounding
instructions for your area and type of equipment.
KEY
APump
H Fluid drain valve (required)
S Dispense valve
T Fluid drain line
Y Fluid section grounding via grounding strip or grounding
screw (required for metal and acetal pumps)
Z Container ground wire (required)
Figure 2
GROUNDING A PUMP
Dispense valve nozzle must be in contact with container.
A
H
S
T
Z
Hose must be conductive.
Y
Y
Attaching the ground wire to the grounding screw (106)
grounds the wetted parts. See grounding screw on page 16.
Fig. 2 shows a recommended method of grounding flam-
mable fluid containers during filling. Ground all of this
equipment:
Pump: Connect the non–clamp end of the ground wire
to the grounding strip or grounding screw, and connect
the clamp end of the ground wire to a true earth ground.
To order a ground wire and clamp, order Part No.
790–100835.
Air and fluid hoses: Use only electrically conductive
hoses.
Air compressor: Follow manufacturer’s recommenda-
tions.
Solvent pails used when flushing: Follow the local
code. Use only grounded metal pails, which are conduc-
tive. Do not place the pail on a non–conductive surface,
such as paper or cardboard, which interrupts the
grounding continuity.
Fluid supply container: Follow the local code. Dis-
pense valve nozzle must be in contact with container.