Discharge Pipe And Pressure Tank Connections - Pentair MYERS MFL Serie Manual Del Usuario

Discharge Pipe and Pressure Tank Connections

Pressure Gauge
and Priming
Plug
Pressure
Switch
Figure 6: Pre-charged Tank
Connections
To Household
Water System
Air Volume
Control
Air Volume
Control Tube
Priming Tee
and Plug
Relief Valve
Pressure
Switch
Figure 7: Standard Tank Connections
To Household
Pre-Charge Tank Connection (Figure 6)
Water System
If your system uses a pre-charged tank, it should be connected to the pump
as shown in Figure 6. The relief valve must be capable of passing the entire
Relief
pump capacity at 100 PSI pressure.
Valve
Check the pre-charge of air in the tank with an ordinary tire gauge. the pre-
charge is measured when there is no water pressure in the tank. Disconnect
power to the pump and drain the tank before checking the pre-charge.
From
Well Your pump has a 30/50 PSI switch, so the tank pre-charge pressure should
be 28 PSI (that is, it should be 2 PSI lower than the cut-in pressure of the
pressure switch.
No AVC is required for a pre-charged tank; the 1/8" NPT AVC port on the
pump body should be plugged.
Standard Tank Connection (Figure 7)
If your system uses a standard tank, connect it to the pump as shown in
Figure 7. The relief valve used with a standard tank must be capable of
passing the entire pump capacity at 75 PSI pressure.
Connect the Air Volume Control (AVC) tube to the 1/8" NPT AVC port
on the pump body. Run the tubing from the pump's AVC port to the AVC
mounted on the tank. See the instructions provided with tank and AVC
for details.
268 0395
Use only PTFE pipe thread sealant tape for making all threaded
connections to the pump itself. Do not use pipe joint compounds on
plastic pumps: they can react with the plastic in pump components.
Make sure that all pipe joints in the suction pipe are air tight as well as
water tight. If the suction pipe can suck air, the pump will not be able to
pull water from the well.
From
Well
276 0395
Sealing Pipe Joints
5