AMTROL EXTROL Expansion Tanks for Hydronic Heating and Chilled Water System Installation Guide
- June 3, 2024
- AMTROL
Table of Contents
AMTROL EXTROL Expansion Tanks for Hydronic Heating and Chilled Water System
Installation Guide
NOTE: Inspect for shipping damage. Notify freight carrier or store where purchased immediately if damage is present. To avoid risk of personal injury and property damage, if the product appears to be malfunctioning or shows signs of corrosion, call a qualified professional immediately. Current copies of the product manual can be viewed at www.amtrol.com. Use proper safety equipment when installing.
THIS IS THE SAFETY ALERT SYMBOL. IT IS USED TO ALERT YOU TO POTENTIAL PERSONAL INJURY AND OTHER HAZARDS. OBEY ALL SAFETY MESSAGES THAT FOLLOW THIS SYMBOL TO REDUCE THE RISK OF PERSONAL INJURY AS WELL AS PROPERTY DAMAGE.
Warning
USE ONLY IN RESIDENTIAL CLOSED HYDRONIC SYSTEMS. Do not install on domestic
water systems, or in open heating systems. Corrosion and tank failure may
result. Use a Therm-X-Trol® or Therm-X-Span® for domestic water systems. Use a
Radiant EXTROL® for radiant heating systems where air elimination equipment or
barrier tubing is not used.
Warning
READ CAREFULLY THE PRODUCT INSTALLATION, OPERATING AND MAINTENANCE MANUAL.
FAILURE TO FOLLOW THE INSTRUCTIONS AND WARNINGS IN THE MANUAL MAY RESULT IN
SERIOUS OR FATAL INJURY AND/OR PROPERTY DAMAGE, AND
WILL VOID THE PRODUCT WARRANTY. THIS PRODUCT MUST BE INSTALLED BY A LICENSED
PROFESSIONAL. FOLLOW ALL APPLICABLE LOCAL AND STATE CODES AND REGULATIONS, IN
THE ABSENCE OF SUCH CODES, FOLLOW THE CURRENT EDITIONS OF THE NATIONAL
PLUMBING CODE AND NATIONAL ELECTRIC CODE, AS APPLICABLE.
Warning
This Product, like most Products under pressure, may over time corrode, weaken
and burst or explode, causing serious or fatal injury, leaking or flooding
and/or property damage. To minimize risk, a licensed professional must install
and periodically inspect and service the Product. A drip pan connected to an
adequate drain must be installed if leaking or flooding could cause property
damage. Do not locate in an area where leaking could cause property damage to
the area adjacent to the appliance or to lower floors of the structure.
Warning
RUPTURE OR EXPLOSION HAZARD. Do not expose product to freezing temperatures or
temperatures in excess of 240°F. Do not adjust the pre-charge or re-charge
this Product except during installation or regular inspection. Replace the
Product and do not adjust the pre-charge if corroded, damaged or with
diminished integrity. Adjustments to pre-charge must be done at ambient
temperature only. Failure to properly size the Product or follow these
instructions may result in excessive strain on the system and may lead to
Product failure, serious or fatal personal injury, leakage, and/or property
damage.
Warning
A relief valve must be installed to prevent pressure in excess of local code
requirement or maximum working pressure designated in the Product Manual,
whichever is less. At least once every 3 years or if discharge is present, a
licensed professional should inspect the pressure relief valve and replace if
corrosion is evident or the valve does not function. FAILURE TO INSPECT THIS
VALVE AS DIRECTED COULD RESULT IN UNSAFE PRESSURE BUILD-UP WHICH CAN RESULT IN
PRODUCT FAILURE, SERIOUS INJURY OR DEATH AND/OR SEVERE PROPERTY DAMAGE AND
VOID THE PRODUCT WARRANTY.
Warning
Chlorine & Aggressive Water: The water quality can significantly influence the
life of this Product. You should test for corrosive elements, acidity, total
solids and other relevant contaminants, including chlorine and treat your
water appropriately to insure satisfactory performance and prevent premature
failure.
Warning
This product can expose you to chemicals including lead, which is known to the
State of California to
cause cancer and birth defects or other reproductive harm. For more
information go to www.P65Warnings.ca.gov.
PLEASE READ THE FOLLOWING INSTRUCTIONS CAREFULLY FOR IMPORTANT GENERAL
SAFETY INFORMATION AND ADDITIONAL SPECIFIC SAFETY ALERTS.
VISIT www.amtrol.com TO VIEW HELPFUL VIDEOS.
Pre-Installation
- Visually inspect for any damage. Ensure expansion tank is sized properly for the application (Figure 1).
- With tank empty of water, remove plastic cap from air stem (Figure 2).
- Check precharge pressure and adjust if necessary, charging with air to match boiler fill valve setting.
- Replace cap and tighten snugly, ensuring the cap is flush against the tank surface.
Figure 1.
Sizing based on: 12 psig Fill; 30 psig Relief Valve; 180°F Average
Temperature.
Figure 2.
Warning
FAILURE TO PROPERLY SEAL CAP WILL RESULT IN LOSS OF PRECHARGE CAUSING PRODUCT
TO FAIL.
Warning
Mount tank vertically in downward position only.
Ensure the piping can support the entire weight of the tank when full of
water.
Warning
Models SX-30V through SX-160V are floor standing and may not be hung from the
piping.
Warning
Do not install the EXTROL on a dead-end pipe or wherever air can collect. This
can cause corrosion and possible leakage.
Installation
- Drain the boiler system or isolate the area where the EXTROL will be installed.
- Install the EXTROL on the supply side of the boiler, on the suction-side of the heating circulator(s) (Figure 3).
- Pressurize the system and check for leaks. Repair as necessary.
- Restart the boiler system and check for relief valve discharge. If the relief valve drips, the tank may be improperly charged or undersized.
Figure 3.
Maintenance
A professional plumber should check the complete system, including the expansion tank, yearly and more frequently as the system ages. Checking the precharge allows a small quantity of air to escape and can result in an insufficient air charge. Always check the precharge while the tank is isolated and empty of water, and be sure to maintain the proper precharge whenever the tank is inspected. Monitor the tip of the inspection cap for discoloration (Figure 4) in addition to regular product inspection. Contact the installer or a plumbing professional if inspection cap is discolored; tank replacement required. Do not rely on cap as sole indication of tank condition.
Figure 4.
Warranty
EX Models: Seven (7) Year Limited Warranty
SX Models: One (1) Year Limited Warranty
Visit www.amtrol.com for complete warranty
details.
Support
1400 Division Road, West Warwick, RI USA 02893
T: 800.426.8765 www.amtrol.com
© 2021 Worthington Industries Inc. Part #: 9015-941 (05/21)
One or more features of this product are covered by U.S. patents, visit
www.amtrol.com/patents for more information.
