Xylem GSSERVICE R2 Service Manual Submersible Pumps & Jet Pumps - Manual (Page 58)

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1. To check: Shut off power supply and drain
system to “0” pressure.
2. Air pre-charge in tank should be 2 psi
less than the cut-in pressure of the pressure
switch.
Example: If pressure switch setting is
30-50 psi, tank should be pre-charged with
28 lbs. air.
3. If water at valve, replace tank.
RULE OF THUMB
Improper tank sizing may cause
motor damage.
½ to 1½ HP pumps – Tank draw down
should be equal to the pump capacity in
GPM or greater.
Example: ¾ HP pump; capacity 12 GPM;
pressure switch setting 30/50 PSI; correct
tank – V140.
2 HP and larger pumps – tank
drawdown should be double the
pump capacity in GPM.
Example: 3 HP pump; capacity 30 GPM;
pressure switch setting 40/60 PSI; correct
tank selection: 2 – V350 tanks.
PRESSURE
TANK
CHECK
OUT
PROCEDURE