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PLEASE READ THE FOLLOWING INSTRUCTIONS CAREFULLY FOR
IMPORTANT GENERAL SAFETY INFORMATION AND ADDITIONAL SPECIFIC SAFETY ALERTS.
EXTROL PRO
is designed for closed, low temperature systems with a
®
maximum operating temperature of 200° F. The product can be used
in glycol applications and features a plastic liner that is compatible with
barrier and non-barrier tubing.
Pre-Installation
1. Visually inspect for any damage. Ensure expansion tank is sized
properly for the intended application (Figure 1: Boiler Application,
Figure 2: Radiant Application).
2. With tank empty of water, remove plastic cap from air stem (Figure 3).
3. Check precharge pressure and adjust if necessary, charging with air
to match boiler fill valve setting.
4. Replace cap and tighten snugly, ensuring the cap is flush against the
tank surface.
FAILURE TO PROPERLY SEAL CAP WILL
RESULT IN LOSS OF PRECHARGE CAUSING
PRODUCT TO FAIL.
Figure 1. Boiler Application
Boiler
Net Output
Finned Tube
in 1000'S
Baseboard or
of BTU/Hr.
Radiant Panel
25
EX-15PRO
50
EX-15PRO
75
EX-30PRO
100
EX-30PRO
125
EX-60PRO
150
EX-60PRO
175
EX-60PRO
200
EX-60PRO
250
*
300
*
Sizi ng based on: 15 psig Fill; 30 psig Relief Valve; 180°F Average Temperature.
* See Extrol EX and SX Sizing.
Figure 2. Radiant Application
Feet of
Tubing
3/8"
1/2"
1,000
EX-15PRO
EX-15PRO
5,000
EX-15PRO
EX-15PRO
7,500
EX-15PRO
EX-15PRO
10,000
EX-15PRO
EX-30PRO
14,000
EX-15PRO
EX-30PRO
18,000
EX-30PRO
EX-60PRO
22,000
EX-30PRO
EX-60PRO
30,000
EX-60PRO
Sizing based on: 15 PSIG fill; 30 PSIG relief valve; 120° F average temperature.
System filled with water. For glycol and solar applications, consult AMTROL Technical Support.
* Contact AMTROL Technical Support.
Figure 3.
Precharge Adjustment
Remove cap and
charge to system
fill pressure.
1400 Division Road, West Warwick, RI USA 02893
T: 800.426.8765 www.amtrol.com
© 2022 Worthington Industries Inc.
One or more features of this product are covered by U.S. patents, visit www.amtrol.com/patents for more information.
VISIT www.amtrol.com TO VIEW HELPFUL VIDEOS
Type of Radiation
Convectors
Radiators
Baseboard
or Unit
Cast Iron
Cast Iron
Heaters
EX-15PRO
EX-15PRO
EX-15PRO
EX-15PRO
EX-30PRO
EX-30PRO
EX-30PRO
EX-60PRO
EX-60PRO
EX-60PRO
EX-60PRO
EX-60PRO
EX-60PRO
*
EX-60PRO
*
EX-60PRO
*
*
*
*
*
*
*
Nominal Pex Tubing Size
5/8"
3/4"
EX-15PRO
EX-15PRO
EX-15PRO
EX-30PRO
EX-30PRO
EX-60PRO
EX-60PRO
EX-60PRO
EX-60PRO
*
*
*
*
*
*
*
*
Replace cap and
tighten until flush
with tank.
Installation
1. Drain the boiler system or isolate the area where the EXTROL PRO will
be installed.
2. Install the EXTROL PRO on the supply side of the boiler, on the
suction-side of the heating circulator(s) (Figure 4).
weight of the tank when full of water.
corrosion and possible leakage.
3. Pressurize the system and check for leaks. Repair as necessary.
4. Restart the boiler system and check for relief valve discharge. If the
relief valve drips, the tank may be improperly charged or undersized.
NOTE: Although the EXTROL-PRO does not have to be installed at the
base of an air purger, this installation is recommended to reduce air
in the system and provide a compact installation. Some method of air
elimination is required to ensure an oxygen-free system.
Figure 4.
Flow-Check
Valve
System
Supply
*
*
*
*
*
*
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
1"
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
EX-15PRO
proper precharge whenever the tank is inspected. Monitor the tip of the
EX-60PRO
inspection cap for discoloration (Figure 5) 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 5.
*
*
InSight
Service Indicator Cap
®
Normal
Operation
Clear / White
Warranty
EX-PRO Models: Seven (7) Year Limited Warranty
Visit www.amtrol.com for complete warranty details.
.
Mount tank vertically in downward position
only. Ensure the piping can support the entire
Do not install the EXTROL PRO on a dead-end
pipe or wherever air can collect. This can cause
Air Vent
Circulator
Air Purger
Fill Valve Assembly
EXTROL
Inspection
Cap
System
Return
Relief
Valve
Boiler
Drain Valve
Replace
Tank
Discolored
Part #: 9015-968 (02/22)
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