Instructions / Assembly
3
TER MO
WATER ENHANCEMENT
ADJUSTING TANK PRE-CHARGE
Correct pre-charge is required for proper tank performance. Any adjustments to the factory pre-charge must be done prior to
initial tank installation and with zero pressure on the system.
WARNING: PROPER PLACEMENT OF TANK This pressure tank should be installed in a covered, dry area. This tank must not be
installed in a location that is subject to freezing or where it can rub or vibrate against a hard surface. The tank must be installed
in a suitable location to prevent water damage due to leaks and have means for adequate drainage. The manufacturer of
this product is not liable or responsible for any water damage associated with the installation and/or failure of this product.
Failure to follow these instructions may result in serious injury, death and/or property damage.
WARNING: FOR POTABLE WATER USE ONLY
This pressure tank is intended for use with potable water systems only. Use
with non-potable water or any other fluid may be dangerous and will void the warranty. This product’s performance and
lifespan can significantly be impacted by aggressive water conditions. A water test should be conducted specifically looking
for corrosive water, acids and other relevant water contaminants which, if present, must be treated appropriately. The
system piping must be properly grounded to earth. A dielectric union may be required in the system. Failure to follow these
instructions may result in serious injury, death and/or property damage.
WARNING: Do not adjust the tank air pressure if there are any visible signs of corrosion on the tank. If this pressure tank shows
any visible signs of corrosion or rusting, the tank must be replaced immediately. Failure to follow these instructions may result in
serious injury, death and/or property damage.
DO NOT ADJUST THE PRE-CHARGE OF THE PRESSURE TANK WITH THE SYSTEM UNDER PRESSURE.
This pressure tank is shipped from the factory with a pre-charge of 38 psi.
1. For tanks installed with a fixed speed pumping system with a dierential pressure set up to 30 psi, the pre-charge should be set
to 2 psi below the cut-in pressure. (Example: In a 20/40 pressure switch, the tank is set to 18 psi; a 30/50 pressure switch, tank is
set to 28 psi; and a 40/60 pressure switch, tank is set to 38 psi.)
2. For tanks installed with a pump controlled by a pressure switch with a pressure dierential greater than 30 psi, electronic controls
or variable speed controls, the pre-charge should be set to 65% of the maximum system pressure.
3. For tanks installed on mains pressure, the tank pre-charge should be set equal to the system pressure. If the system pressure
exceeds 88 psi then a suitable pressure reducing valve should be installed.
WARNING: In no event should the tank pre-charge exceed 80 psi.
TO ADJUST TANK PRE-CHARGE PRIOR TO INSTALLATION
• Remove the protective cap from the air valve.
• Check the tank pre-charge pressure using a suitable pressure gauge.
• If required, add air at ambient temperature to the tank using a manual pump or air compressor until the proper pre-charge
pressure is reached.
• Replace the protective cap on the air valve.