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PLEASE READ THE FOLLOWING INSTRUCTIONS CAREFULLY
ADDITIONAL SPECIFIC SAFETY ALERTS APPEAR IN THE FOLLOWING INSTRUCTIONS.
FAILURE TO PROPERLY SEAL THE VALVE CAP 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. With tank empty of water, adjust pre-charge to match cold
water supply pressure.
Failure to follow these instructions could result in damage
to the bladder or diaphragm and void all warranties.
3. Replace and tighten plastic cap on air stem.
4. Therm-X-Trol Deep Drawn(-DD) only: Insert Turbulator
into connector.
5. 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). Mount vertically only.
6. Once the THERM-X-TROL is installed, check the city supply
line for any leakage. Make repairs if necessary.
7. 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).
8. 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.
9. 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.
1400 Division Road, West Warwick, RI USA 02893
T: 800.426.8765 www.amtrol.com
© 2019 Worthington Industries Inc.
One or more features of this product are covered by U.S. patents, visit www.amtrol.com/patents for more information.
IMPORTANT GENERAL SAFETY INFORMATION -
™
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 temperature is not to exceed 200° F or fall below 35° F.
NOTE: Models are listed (ST-5C through ST-210VC) under
ASME Section VIII, Division I.
Warranty
ST-5C through ST-210VC Models
Visit www.amtrol.com for complete warranty details.
Figure 1. Typical Installation
Turbulator
Installation (ST-5C-DD & ST-20VC-DD only)
™
Backflow Preventor, Check Valve
or Pressure Reducing Valve
Cold
Water
Supply
Turbulator
Installation
™
Deep Drawn (DD) Models Only
Turbulator
Press Turbulator fully
into connector prior
Tank Connector
to installing tank.
ST-20VC
BFP, Check or PRV
CWS
THERM-X-TROL
Expansion Tank
: One (1) Year Limited Warranty
Hot Water
In-Line
Models
Thermal
T & P
Expansion
Relief
Tank
Valve
Water
Heater
Stand
Models
Hot Water
T & P
Valve
Water
Heater
LOW-LEAD
Part #: 9017-091 (01/19)
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