Typical Pressure Booster System - Pentair PRO SHALLOW SN Series Owner's Manual

TYPICAL PRESSURE BOOSTER SYSTEM

Figure 6: Model SNCP42
Figure 7: Model SNCP15
USER SUPPLIED COMPONENTS
Low Pressure
Cutoff Switch (1)
Check Valves (2)
Gate Valves (2)
Relief Valve (1)
P15001 (11-01-22)
Pressure Gauge (1)
Unions (3)
Elbow (1)
Tees (2)
Piping
INSTALLATION
HAZARDOUS PRESSURE.
shown capable of passing entire pump flow at 75 PSI. Pump body
may explode if internal pressure exceeds 75 PSI.
NEVER RUN PUMP AGAINST CLOSED DISCHARGE.
do so can boil water inside pump, causing hazardous pressure
in unit, risk of explosion and possibly scalding persons handling
pump.
The incoming flow rate must equal or exceed the minimum

pump flow requirement of 6 Gallons per Minute or the pump
will fail. As a rule, the pump will not increase the flow rate in
the system.
A low pressure safety cutoff switch is recommended

to shut off power to the pump in case of low discharge
pressure caused by plugged nozzle, interruption to the
incoming water supply, etc.
For pressure switch adjustment instructions, refer to the

label inside the cover of the pressure switch.
The system can be located indoors or outdoors. Make sure

that the site is level, solid, well drained, and protected from
the weather and from freezing.
1. Turn off city water to house.
2. Install pipe as shown (Figures 6 & 7). Be sure to include
unions and stop valves so pressure booster unit can be
removed for service without interrupting household water
supply.
A spring loaded check valve ahead of the booster system
and a low pressure cutoff switch after it are recommended
You may wish to replace the standard pressure switch with
a pressure switch that includes a low pressure cutoff.
3. Use PTFE pipe thread sealant tape on all piping joints to
prevent leaks.
4. Proceed to the Electrical section for hookup information.
TABLE I: PRESSURE SWITCH SETTING FOR BOOSTER SYSTEM
USE PRESSURE
IF MINIMUM INCOMING
SWITCH RATED
SYSTEM PRESSURE IS
20/40; set cut-
Below 20 PSI
in to 20 PSI
30/50; set cut-
20- 30 PSI
in to 30 PSI
40/60; set cut-
30- 40 PSI
in to 40 PSI
Install a relief valve as
SET TANK PRECHARGE
AT
AT
18 PSI
28 PSI
38 PSI
To
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