Piping - General; Priming The Pump - Pentair STA-RITE J Series Owner's Manual

Installation

Piping - General

Support both suction and discharge piping independently
at a point near the pump to avoid putting a strain on the
pump housing. Start all piping at the pump.
Increase pipe diameter at both the suction and discharge
by one (1) standard pipe size (minimum) to obtain
desired pressure and flow rate. Refer to Table I when
sizing pipe for your pumping system.
NOTICE: Do not use pipe with smaller diameter on the
suction side of pump.
Table I - Recommended Pipe Size
Pipe Tapping Size On Pump (in)
Suction Discharge
1-1/4 1
1-1/2 1-1/4
2 1-1/2
Suction Pipe
Increase pipe size from pump tapping as shown in
Table I. Figure 1 depicts a recommended run of pipe and
fittings for the suction side of a centrifugal pump. Please
refer to this illustration when choosing pipe and fittings
for your suction connection.
NOTICE: All connections must be air tight!
Figure 2 depicts conditions that are not desirable on
the suction side of a centrifugal pump and may cause
problems in flow rate and priming. Please look this
illustration over carefully before choosing pipe and
fittings for your suction connection.
Discharge Piping
Increase pipe size from pump tapping as show in Table I.
Figure 1 depicts a recommended run of pipe and fittings
for the discharge. Install tee with priming plug as close to
pump as possible. Figure 2 depicts conditions that should
be avoided. Please examine carefully before making
discharge connection.
Table II - Recommended Fusing And Wiring Data - 50 Cycle, Single Phase, 220 V Motors
Max. Load Branch Fuse*
Motor HP Amperes Rating Amps
1/2 4.4
3/4 6.2
1 7.4
1-1/2 9.6
* Time delay fuse or circuit breakers are recommended in any motor circuit.
Recommended Pipe Size (in)
Suction Discharge
1-1/2 1-1/4
2 1-1/2
3 2
0' to 100' 101' to 200'
15 14
15 14
15 14

Priming The Pump

A pump is primed when all air in the suction line and
pump volute has been evacuated and replaced with water.
To prime pump:
1. Close valve in discharge line.
2. Remove priming plug from tee and fill pump and
suction line with water until water is flowing back
out of tee.
3. Replace priming plug.
4. Start pump and slowly open valve until desired water
flow is achieved.
NOTICE: If water is not being pumped, turn off
pump, close valve, and repeat steps 1 thru 4.
If pump volute is rotated as shown in Figure 1, loosen
vent plug when priming to evacuate air trapped inside
volute. Tighten when volute is filled with water.
Risk of explosion and scalding. Never run
pump against closed discharge. To do so can boil water
inside pump, causing hazardous pressure buildup and
possible explosion.
Risk of burns. Motor normally operates
at high temperature and will be too hot to touch. It is
protected from heat damage during operation by an
automatic internal cutoff switch. Before handling pump
or motor, stop motor and allow it to cool for 20 minutes.
Risk of flooding. Do not run the pump dry.
This will damage mechanical seal and void warranty. It
may cause burns to person handling pump.
Electrical
See Table II for recommended fusing and wiring data.
Distance In Feet From Motor To Fuse/Breaker
201' to 300'
Wire Size
14 14
14 12
5
301' to 400' 401' to 500'
14 12
12 10
10 10