FAILURE TO PROPERLY SEAL WILL RESULT IN LOSS
OF PRECHARGE CAUSING PRODUCT TO FAIL
.
Installation
THIS PRODUCT MUST BE INSTALLED BY A
LICENSED PROFESSIONAL.
1. Visually inspect THERM-X-TROL
for any damage. If damage
exists return product for replacement.
2. Adjust pre-charge to equal incoming pressure.
IMPORTANT
: If increasing pre-charge pressure above
55 psig the following steps must be followed:
a. Tank must be connected to the system with isolation
valve open.
b. System must be pressurized to 55-60 psig or slightly
higher than the pre-charge setting of the tank.
c. Isolation valve needs to be shut.
d. Pre-charge pressure of tank can now be increased to
the recommended high pressure setting.
e. Bring system up to pressure, and then open the
isolation valve to the tank.
Failure to follow these steps could result in damage to
the bladder and void all warranties.
3. Replace and tighten plastic cap on air fitting.
4. Install the THERM-X-TROL
on the city supply line to the
water heater at a point between the water heater and
backflow preventer, check valve or pressure reducing valve
(see Figure 1).
5. Once the THERM-X-TROL
is installed, check the city supply
line for any leakage. Make repairs if necessary.
6. Before the initial firing of the water heater, open any hot
water fixture and draw water until all air is removed from the
system. Turn the water heater temperature control to desired
ending temperature level, (see water heater instructions).
7. To relieve initial thermal expansion, slightly open a hot water
faucet. Continue until water heater aquastat temperature is
satisfied. Once heater is at its operating range, no further
bleeding of expanded water is required.
8. The system water heater and THERM-X-TROL
will now
be operational. The THERM-X-TROL
will control pressure
increases caused by thermal expansion to a level well below
the water heater relief valve setting.
Maintenance
1. A licensed professional should check the complete heating
system, including the THERM-X-TROL, yearly and more
frequently as the system ages.
Operation
1. The THERM-X-TROL
is installed in the supply line between
the backflow preventer and the water heater. Its sealed-in air
pre-charge prevents water from entering it until the system
pressure exceeds the pre-charge pressure.
2. As the water temperature rises, expanded water enters
the THERM-X-TROL’s non-corrosive water reservoir. The
pre-charged air chamber absorbs the pressure increase,
keeping system pressures below the relief valve setting.
3. As hot water is used, the pressure in the air chamber forces
water back into the system until the THERM-X-TROL is
empty. At this point, the pressure in the air chamber once
again equals the supply pressure.
4. Water treatment is not to exceed 200° F or fall below 35° F.
Warranty
ST-35L(CL) through ST-600L(CL) Models:
One (1) Year Limited Warranty
Visit www.amtrol.com for complete warranty details.
PLEASE READ THE FOLLOWING INSTRUCTIONS CAREFULLY
IMPORTANT GENERAL SAFETY INFORMATION -
ADDITIONAL SPECIFIC SAFETY ALERTS APPEAR IN THE FOLLOWING INSTRUCTIONS.
Hot Water
CWS
Water
Heater
Back Flow Preventer
Check Valve or
Pressure Reducing Valve
Air Valve
System
Connection
bladder
THERM-X-TROL
Lifting
Ring
Figure 1.
© 2019 Worthington Industries Inc.
Part #: 9017-118 (06/19)
One or more features of this product are covered by U.S. patents, visit www.amtrol.com/patents for more information.
1400 Division Road, West Warwick, RI USA 02893
T: 800.426.8765
www.amtrol.com
