Honeywell TX-5, TX-12 Installation Manual
Instruction Sheet
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IS 5-TX TX-12
EFFECTIVE
May 2003
The Honeywell Thermal Expansion Absorber is a pre-pressurized Expansion tank with a butyl diaphragm designed to
control excess pressure in potable hot water systems. It’s use for household as well as small commercial hot water
heaters will save energy and operating problems by preventing relief valve operation due to excessive system pressure.
Installation
Connect the Honeywell Thermal Expansion Absorbe
tank to the cold water inlet line to the water heater. The
Honeywell tank connection must be between the wate
heater and any valve or backflow preventer. Adjust the
Honeywell tank air pressure to the minimum cold wate
pressure by adding or releasing air from the tank. Fill
tank and piping with cold water, open hot water fauce
to allow a small trickle of water. Turn on water heate
and allow it to come up to normal operating
tem
erature. Close hot water faucet.
Product Information And Specifications
Maximum allowable working pressure 150 psig/1034 kPa
Maximum allowable working temperature 200 °F/93 °C
Standard Factory Air Charge is 40 psig/276 kPa
NOTE: Relief valve must be set to 150 psig maximum
Materials: Diaphragm: Butyl Rubber
Liner: Polypropylene
Approvals: NSF61, City of Los Angeles and others.
Listed by IAPMO
Connection: Brass
Model
No.
TX-5 2.0 gal. .09 gal. 8” 12 5/8” ¾” male
TX-12 4.4 gal. 3.2 gal. 11” 15” ¾” male
20 30 40 50 60 70 80 90 100 110 120
20
30
40
50
80
Water Heater U.S Gallons
100
120
Thermal Expansion Absorber For Potable Water
Total
Volume
QUICK SIZING CHART
Supply pressure (PSIG)
TX Residential Series Tanks
SYMBOLS
V = Any device which turns the domestic water system into a
closed system such as; backflow preventers, check valves or
pressure reducing valves.
NOTES:
• “V”’ is optional depending on local codes. If a “V” type valve is
used, it is mandatory that a thermal expansion tank be installed
as shown. Otherwise, dangerously high pressures could result
or water heater safety relief valve will frequently expel water. If
Max. Acceptable
Volume
TX 5
TX 12
no “V” device is used, the thermal expansion tank is not
required.
Dia. Dimensions
Length
Based on:
• Heating water from 70° to 140° F.
• Maximum pressure maintained at least
10% below relief valve setting (150 psig)
• Factory pre-charge of 40 PSIG- no need to
change when selected according to this
chart.
NPT System
Conn.
Automation Control Solutions-Water Control Products
Warranty Policy
Honeywell Water Controls warrants this product to be free from defects due to workmanship or materials,
under normal use and service, for twelve (12) months from date of installation.
If a product is defective due to workmanship or materials, is removed within the applicable warranty
period, and is returned to Honeywell in accordance with the procedure described below, Honeywell will, at
its option, either repair, replace or credit the customer for the purchase price of the product, in a
accordance with the procedure described below.
The express warranty above constitutes the entire warranty of Honeywell with respect to the products in
this catalog and IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING ANY
WARRANTY OF MERCHATABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE, IN
NO EVENT SHALL HONEYWELL WATER CONTROLS BE RESPONSIBLE FOR ANY
CONSEQUENTIAL DAMAGES OF ANY NATURE WHATSOEVER.
If you have any questions, need additional information or would like to comment on Honeywell’s products
or services, please write or phone:
Honeywell Water Controls
Customer Service
65 Access Road
Warwick, Rhode Island 02886
(401) 738-4290
• 65 Access Road • Warwick, RI 02886 USA • 800-247-2919 • FAX: 800-777-2726
Web Address: www.honeywellwatercontrols.com
Copyright Honeywell 2003• All Rights Reserved
IS TX-5TX-12 (05/03)
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