resideo TX-12/U 4.4 Gallon Potable Water Thermal Expansion Tank Instruction Manual
- June 1, 2024
- resideo
Table of Contents
resideo TX-12/U 4.4 Gallon Potable Water Thermal Expansion Tank
Product Information
Specifications
- Maximum allowable working pressure: 150 psig/1034 kPa
- Standard Factory Air Charge: 40 psig/276 kPa
- Materials:
- Diaphragm: Butyl Rubber Compound
- Liner: Polypropylene
- Connection: Stainless Steel
- Approvals: NSF61, City of Los Angeles and others. Listed by IAPMO
| Model No. | Total Volume | Max. Acceptance Volume |
|---|---|---|
| TX-5 | 2.0 Gal. | 0.9 Gal. |
| TX-12 | 4.4 Gal. | 3.2 Gal. |
| TX-25V | 10.3 Gal. | 10.3 Gal. |
Product Usage Instructions
Installation
- Connect the Thermal Expansion Absorber tank to the cold water inlet line of the water heater.
- The tank connection must be between the water heater and any valve or backflow preventer.
- Adjust the tank air pressure to the minimum cold water pressure by adding or releasing air from the tank.
- Fill the tank and piping with cold water.
- Open a hot water faucet to allow a small trickle of water.
- Turn on the water heater and allow it to come up to its normal operating temperature.
- Close the hot water faucet.
Water Use Fixtures
Refer to the provided installation diagram (Fig. 1) for proper placement of
the expansion tank and fixtures in your system.
Sizing Chart
Refer to the quick sizing chart (Fig. 2) to determine the appropriate
expansion tank based on water heater capacity and supply pressure.
INSTALLATION INSTRUCTIONS
APPLICATION
The Thermal Expansion Absorber is a pre-pressurized expansion tank with a
butyl diaphragm designed to control excess pressure in potable hot water
systems. Its use for household as well as small commercial hot water heaters
will save energy and reduce operating problems by preventing relief valve
operation due to excess system pressure
INSTALLATION
- Connect the Thermal Expansion Absorber tank to the cold water inlet line of the water heater. The tank connection must be between the water heater and any valve or backflow preventer.
- Adjust the tank air pressure to the minimum cold water pressure by adding or releasing air from the tank. Fill the tank and piping with cold water. Open a hot water faucet to allow a small trickle of water. Turn on water heater and allow it to come up to its normal operating temperature. Close the hot water faucet.
SPECIFICATIONS
-
Maximum allowable working pressure: 150 psig/1034 kPa
-
Maximum allowable working temperature: 200 °F/93 °C
-
Standard Factory Air Charge: 40 psig/276 kPa
NOTE: Relief valve must be set at 150 psig maximum.- Materials: Diaphragm: Butyl Rubber Compound
- Liner: Polypropylene
- Connection : Stainless Steel
- Approvals: NSF61, City of Los Angeles and others. Listed by IAPMO
Fig. 2 Based On:
- Heating water from 70 °F to 140 °F
- Maximum pressure maintained at least 10% below relief valve setting (150 PSIG).
- Tank air charge matched to city supply pressure.
SYMBOLS
V = Any device that turns the domestic water system into a closed system
such as; backflow preventers, check valves or pressure-reducing valves.
NOTE: “V” is optional depending on local codes. If a “V” type valve is
used, a thermal expansion tank must be installed as shown. Otherwise,
dangerously high pressures could result or the water heater safety relief
valve will frequently expel water.
If no “V” device is used, the thermal expansion tank is not required.
PRODUCT INFORMATION
Model No.| Total Volume| Max. Acceptance Volume| Dimensions| NPT
System **Connection***
---|---|---|---|---
Diameter| Length
TX-5| 2.0 Gal.| 0.9 Gal.| 8”| 13”| 3/4” M
TX-12| 4.4 Gal.| 3.2 Gal.| 11”| 15”| 3/4” M
TX-25V| 10.3 Gal.| 10.3 Gal.| 15”| 19”| 3/4” F
Connections: M = Male NPT F = Female NPT
FAQ
- Q: Is the V device required for installation?
- A: The V device is optional depending on local codes. If a V-type valve is used, a thermal expansion tank must be installed as shown in the installation diagram. Otherwise, dangerously high pressures could result or the water heater safety relief valve will frequently expel water.
- Q: What should the relief valve be set at?
- A: The relief valve must be set at a maximum of 150 psig.
- Q: What are the approval standards for the product?
- A: The product is approved by NSF61, the City of Los Angeles, and others. It is also listed by IAPMO.
Contact
Resideo Technologies, Inc.
- 1985 Douglas Drive North, Golden Valley, MN 55422
- 1-800-468-1502
- 33-00531—03 SA Rev. 06-23 | Printed in United States
- www.resideo.com
© 2023 Resideo Technologies, Inc. All rights reserved.
The Honeywell Home trademark is used under license from Honeywell
International, Inc. This product is manufactured by Resideo Technologies, Inc.
and its affiliates.
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