PA SERIES OM-06704
PAGE B - 5INSTALLATION
DISCHARGE LINES
Siphoning
Do not terminate the discharge line at a level lower
than that of the liquid being pumped unless a si
phon breaker is used in the line. Otherwise, a si
phoning action causing damage to the pump
could result.
Valves
This pump is designed with a check valve in the
discharge line.
If a throttling valve is desired in the discharge line,
use a valve as large as the largest pipe to minimize
friction losses. Never install a throttling valve in a
suction line.
With high discharge heads, it is recommended that
a throttling valve be installed in the discharge line
to protect the pump from excessive shock pres
sure and reverse rotation when it is stopped.
If the application involves a high discharge
head, gradually close the discharge
throttling valve before stopping the pump.
ELECTRICAL CONNECTIONS
Obtain the services of a qualified elec
trician to make all electrical connec
tions and to service the control box.
The electrical power used in this control
box is high enough to cause injury or
death. Make certain that the control box
is properly grounded after installation.
Make certain that the power source
phase and voltage matches the data on
the control box. Complete all electrical
connections before connecting the
power supply to the control box. Make
certain to ground the appropriate lead
of the power source before connecting
power to the control. Make certain that
the control box is properly grounded af
ter installation.
Grounding Methods
Electrically ground the installation before connect
ing the field wiring to the control box. Install a
grounding terminal to the enclosure and connect it
to a properly embedded electrode.
The material used for the electrode must be an ex
cellent conductor of electricity, such as copper. If
iron or steel is used, it must be galvanized or other
wise metal plated to resist corrosion. Do not coat
the electrode with any material of poor conductiv
ity, such as paint or plastic.
The electrode must conform to the recommenda
tions of N.E.C. ARTICLE 250. Follow all installation
requirements of the N.E.C., and all applicable
codes. See Figure 3 for some suggested ground
ing methods.
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