Xylem IM244R04 SPD Plus Variable Speed Pump Control User Manual
Page 9
9
SECTION 3: SYSTEM DESIGN
DIAGRAM #2 shows a set-up for an Above Ground booster pump and control system.
FLOW
AIR
4
8
6
3 PHASE OUTPUT
TO MOTOR
5
1
2
SUCTION
3
8
9
7
1 SPD CONTROLLER
6
AIR DIAPHRAGM TANK
2 FUSIBLE DISCONNECT
7
3 PHASE MOTOR
3 CENTRIFUGAL PUMP
8
GATE VALVE (BALL VALVE)
4 CHECK VALVE
9
PRESSURE GAUGE
5 PRESSURE TRANSDUCER (CABLE ASSEMBLY) 10 PRESSURE RELIEF VALVE
9
U2
V2
W2
U1
V1
W1
SUPPLY POWER
GND
GND
10
SECTION 4: PIPING
GENERAL
NOTE
All plumbing work must be performed by a qualified
technician. Always follow all local, state and provincial
codes.
A proper installation requires a pressure relief valve,
a ¼" female N.P.T. threaded fitting for the pressure
sensor, and properly sized pipe. Piping should be
no smaller than the pump discharge and/or suction
connections. Piping should be kept as short as
possible. Avoid the use of unnecessary fittings to
minimize friction losses.
Some pump and motor combinations
controlled by the SPD Plus can create
dangerous pressure. Select pipe
and fittings according to your pipe suppliers’
recommendation. Consult local codes for piping
requirements in your area.
All joints must be airtight. Use PTFE thread seal tape
or another type of pipe sealant to seal threaded
connections. Please be careful when using thread
sealant as any excess that gets inside the pipe may
plug the pressure sensor.
Galvanized fittings or pipe should never be connected
directly to the stainless steel pump discharge or
casing as galvanic corrosion may occur. Barb type
connectors should always be double clamped.
PRESSURE TANK, PRESSURE RELIEF VALVE AND
DISCHARGE PIPING
Use only “pre-charged” tanks on this system. Do not
use galvanized tanks. Select an area that is always
above 34º F (1.1º C) in which to install the tank,
pressure sensor and pressure relief valve. If this is
an area where a water leak or pressure relief valve
blow-off may damage property, connect a drain line
to the pressure relief valve. Run the drain line from the
pressure relief valve to a suitable drain or to an area
where water will not damage property.
Hazardous
Pressure
CAUTION