Installing The Expansion Tank - Utilitech LET2 Mode D'emploi

3. The expansion tank is designed to be supported by the system piping in the vertical position.
If, however, the expansion tank must be installed horizontally, as shown in Figure 2, it must be
supported by adequate strapping (not supplied).
4. The expansion tank, pipes, and your connections may, in time, leak. Put the expansion tank in
a place where a water leak will not damage anything. The expansion tank should be located in
an area where water leakage from the tank or connections will not result in damage to the area
around the expansion tank or to the lower floors of the structure.

INSTALLING THE EXPANSION TANK

WATER PIPING
This expansion tank is designed for operation on the inlet cold water line and is limited to a
maximum working pressure of 150 pounds per square inch (psi).
Figures 1 and 2 above show the correct valves and fittings that you will need to install your
expansion tank. A threaded (3/4 in.) water connection is supplied on the tank bottom.
FOLLOW THE INSTALLATION INSTRUCTIONS FOUND IN THE PACKAGING OF THE PRESSURE
REDUCING VALVE AND PRESSURE GAUGE.
1. The water supply and power (electricity or gas) must be shut off during the installation of
the valves and expansion tank. Follow the instructions found on the water heater and in the
owner's manual.
2. Install expansion tank, pressure gauge, and pressure reducing valve, if required, as shown
above in Figures 1 and 2.
3. After installing the expansion tank, pressure gauge, and pressure reducing valve, it will be
necessary to expel all air from the piping. Turn the cold water inlet shut-off valve "ON." To purge
the air, open a faucet and wait until a steady stream of water is coming from the faucet. At this
time, close the faucet.
ADJUSTING WATER PRESSURE
1. Recommended inlet water pressure is 60 psi or less.
2. Refer to the pressure gauge. Using the adjusting screw on the pressure reducing valve, increase
or decrease the pressure as indicated on the valve.
(1)
WATER HEATER
EXPANSION
COLD WATER INLET
TANK
FITTING
HOT COLD
RECOMMENDED INSTALLATION - VERTICAL MOUNTING
FIGURE 2.
FLOOR, CEILING,
JOINT, ETC.
STRAPPING
(3)
PRESSURE
REDUCING
VALVE WITH
BY-PASS
(2)
INLET
PRESSURE
COLD WATER
GUAGE
SHUT-OFF
6