Xylem RJ Enduro Tank IOM 3 languages Tri-lingual - Manual (Page 5)

5
Underground
Pressure
Tanks Buried model water system tanks are
designed for direct burial and can be
installed in the horizontal or vertical position.
To eliminate the danger of freezing, tank
must be buried below frost line.
The following steps should be taken when
installing the water system tank.
1. Make sure that tank will be buried below
frost line and above water table.
2. Use galvanized or plastic pipe
for section of pipe buried in the ground.
3. Check tank precharge. Tank precharge
must be adjusted to the pressure required
by the pressure switch setting (see section
on Operation).
4. Install tank on firm rock-free earth.
5. The water line from the pump to the
tank and from the tank to the pressure
switch location should be the same size.
6. Check system for performance
and inspect for leaks.
7. Backfill hole with sand or rock-free dirt.
Firmly tamp fill to prevent settling.
8. Make note of tank location so that it
can be easily located at a later time.
Operation
THESE WATER TANKS ARE DESIGNED FOR OPERATION ON AMBIENT TEMPERATURE WATER SYSTEMS
LIMITED TO A MAXIMUM WORKING PRESSURE OF 125 POUNDS PER SQUARE INCH GAUGE (PSIG). IF YOUR
SYSTEM HAS THE ABILITY TO EXCEED 125 PSIG WORKING PRESSURE (100 PSIG IF THIS IS A PUMP MOUNTED
UNIT), A SUITABLE SAFETY DEVICE MUST BE INSTALLED. THIS CAN BE EITHER A HIGH PRESSURE ELECTRICAL
CUT-OFF SWITCH AND/OR A PRESSURE RELIEF VALVE. FAILURE TO FOLLOW THESE INSTRUCTIONS CAN
CAUSE TANK RUPTURE AND RESULT IN PERSONAL INJURY AND/OR PROPERTY DAMAGE.
Before you operate the system you must check your water system tank and system to ensure proper operation.
All water system tanks are precharged at the factory. All 8 and 11 inch diameter tanks are precharged at 18 psig. The 15
inch diameter tanks are precharged at 28 psig while the 22 and 26 inch diameter tanks are precharged to 38 psig. The
final precharge pressure should always be 2 to 3 psig below the cut-in (pump turns on) pressure of the pressure switch.
Release air or add air as required using the following procedure.
1. Determine the pump cut-in pressure setting. The pressure switch should have this information located on/in the
cover.
2. With no water in the tank, measure the precharge of the water system tank using an accurate pressure gauge at the
air valve (similar to an auto tire gauge).
3. Release air or add air to the tank to make the pressure in the tank 2 to 3 psig LESS than the pump cut-in pressure
setting.
4. It will be necessary to expel air from the piping system on new installations. To do this open all faucets and turn on the
pump. Observe that a mixture of water and air will sputter from the faucet. Run the system until a steady flow of
water exists. Open and close the faucets several times to assure that all air has been removed. If streams do not
become steady, an air leak may exist. Check for leaks on suction side piping.
5. It may be necessary to make final adjustments on the system pressure switch setting because at times the actual
pressure switch setting will vary from what is stated on the cover. Such variation, though not harmful, could cause a
momentary lag of water delivery. To make this adjustment the following steps should be followed:
a. Fill the system until the pump shuts off.
b. Open a faucet and drain the water system tank until the pump starts.
c. If there is a pause in the water flow from the time the water system tank is emptied and the pump starts up
again, decrease the air pressure in the tank until it is 2 to 3 psig below the cut-in pressure setting. (See
Trouble Shooting section 3(a-b) for procedure)
d. Close the faucets and refill the water system tank. Repeat steps (b) and (c) if necessary until there no
longer is a pause in water flow.
WARNING