Extrol SX-60V - Water heaters and boilers Amtrol - Free user manual and instructions

Product Type	Expansion tank for closed hydronic heating systems
Brand	Amtrol
Model	Extrol SX-60V
Capacity	6.6 gallons (25 liters)
Max Working Pressure	30 psig (2.1 bar)
Max Temperature	240°F (115°C)
Pre-Charge Pressure	12 psig (adjustable)
Connection Size	1 inch NPT (female)
Mounting	Floor standing (vertical)
Dimensions (approx.)	14" diameter x 24" height
Weight (approx.)	28 lbs (12.7 kg)
Material	Steel with epoxy lining
Features	InSight™ service indicator cap, pre-charge valve, floor stand
Application	Residential closed hydronic heating systems with boilers up to 1500 kBTU/hr
Warranty	1 year limited warranty
Maintenance	Annual pre-charge check by professional; inspect indicator cap for discoloration
Safety	Relief valve required (not included); do not expose to freezing or above 240°F
Compliance	Meets applicable ASME standards; lead warning per California Prop 65

Frequently Asked Questions - Extrol SX-60V Amtrol

What is the Extrol SX-60V used for?

The Extrol SX-60V is an expansion tank designed for closed hydronic heating systems, primarily residential boilers. It accommodates thermal expansion of water to prevent pressure buildup.

How do I size the expansion tank for my boiler?

Refer to the sizing chart in the manual based on boiler output (BTU/hr) and type of radiation. For example, a 350 kBTU/hr boiler with finned tube baseboard requires an SX-30V; for 700 kBTU/hr with cast iron radiators, use SX-60V. Consult a professional for exact sizing.

What is the correct pre-charge pressure for the SX-60V?

The factory pre-charge is typically 12 psig. Adjust it to match the boiler fill valve pressure (usually 12 psig) when the tank is empty of water. Always check and adjust before installation.

How do I install the Extrol SX-60V?

Install on the supply side of the boiler, on the suction side of the circulator. Mount vertically on the floor (it is not designed to be hung). Ensure piping supports the tank. Do not install on a dead-end pipe or where air can collect.

Can I install the SX-60V on a domestic water system?

No. This product is for closed hydronic systems only. For domestic water, use a Therm-X-Trol or Therm-X-Span expansion tank.

How often should I check the pre-charge?

Annually by a professional. Check only when the tank is isolated and empty of water. A small loss of air during checking is normal, so recharge to the proper pressure.

What does the InSight indicator cap show?

The cap is clear/white during normal operation. If it becomes discolored (e.g., brown), it indicates internal corrosion and the tank must be replaced. Do not rely solely on the cap; inspect the entire tank.

What safety precautions should I take?

Install a relief valve rated for the system pressure. Do not expose the tank to freezing temperatures or above 240°F. Use proper safety equipment. Have a licensed professional install and inspect annually.

What is the warranty on the SX-60V?

The SX-60V has a 1-year limited warranty. EX models have 7 years. See www.amtrol.com for full details.

Why is my relief valve dripping after installation?

Possible causes: the expansion tank is undersized, pre-charge pressure is incorrect, or the tank is not properly charged. Check the pre-charge and sizing. If the problem persists, consult a professional.

USER MANUAL Extrol SX-60V Amtrol

Models EX-15 through EX-90

Models SX-30V through SX-160V

Exterior view of two AMTROL EXTROL water pressure vessels (no signage or text beyond branding)

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

1. Visually inspect for any damage. Ensure expansion tank is sized properly for the application (Figure 1).
2. With tank empty of water, remove plastic cap from air stem (Figure 2).
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.

Figure 1.

Boiler Net Output in 1000'S of BTU/Hr.	Type of Radiation
	Finned Tube Baseboard or Radiant Panel	Convectors or Unit Heaters	Radiators Cast Iron	Baseboard Cast Iron
25 EX-15	EX-15 EX-15 EX-15
50 EX-15	EX-15 EX-30 EX-30
75 EX-30	EX-30 EX-30 EX-60
100 EX-30	EX-30 EX-60 EX-60
125 EX-30	EX-60 EX-60 EX-90
150 EX-30	EX-60 EX-90 EX-90
175 EX-60	EX-60 SX-30V SX-30V
200 EX-60	EX-90 SX-30V SX-30V
250 EX-90	EX-90 SX-30V SX-40V
300 EX-90	SX-30V SX-40V SX-40V
350 SX-30V	SX-30V SX-40V SX-60V
400 SX-30V	SX-40V SX-60V SX-60V
450 SX-40V	SX-40V SX-60V SX-90V
500 SX-40V	SX-40V SX-60V SX-90V
550 SX-40V	SX-60V SX-60V SX-90V
600 SX-40V	SX-60V SX-90V SX-90V
650 SX-60V	SX-60V SX-90V SX-90V
700 SX-60V	SX-60V SX-90V SX-90V
750 SX-60V	SX-60V SX-90V SX-110V
800 SX-60V	SX-90V SX-90V SX-110V
850 SX-60V	SX-90V SX-90V SX-110V
900 SX-60V	SX-90V SX-110V	SX-110V
950 SX-90V	SX-90V SX-110V	SX-110V
1,000	SX-90V SX-90V SX-110V		SX-110V
1,100	SX-90V SX-90V SX-110V		SX-130V
1,200	SX-90V SX-90V SX-110V		SX-130V
1,300	SX-90V SX-110V	SX-130V	SX-160V
1,400	SX-110V	SX-130V	SX-160V	SX-160V
1,500	SX-110V	SX-130V	SX-160V	(2)SX-110V

Sizing based on: 12 psig Fill; 30 psig Relief Valve; 180°F Average Temperature.

Figure 2.

FAILURE TO PROPERLY SEAL CAP WILL RESULT IN LOSS OF PRECHARGE CAUSING

Mount tank vertically in downward position only. Ensure the piping can support the entire weight of

Models SX-30V through SX-160V are floor standing and may not be hung from the piping.
Do not install the EXTROL on a dead-end pipe or wherever air can collect. This can cause corrosion
and possible leakage.

Installation

1. Drain the boiler system or isolate the area where the EXTROL will be installed.
2. Install the EXTROL on the supply side of the boiler, on the suction-side of the heating circulator(s) (Figure 3).
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.

Figure 3.

graph LR
    A["System Supply"] --> B["Flow-Check Valve"]
    B --> C["Circulator"]
    C --> D["Air Vent"]
    D --> E["Air Purger"]
    E --> F["Fill Valve Assembly"]
    F --> G["Extrrol"]
    G --> H["Inspection Cap"]
    H --> I["Boiler"]
    I --> J["Relief Valve"]
    J --> K["Drain Valve"]
    K --> L["System Return"]

Stand Models: SX-30V through SX-160V

graph LR
    A["System Supply"] --> B["Flow-Check Valve"]
    B --> C["Circulator"]
    C --> D["Air Vent"]
    D --> E["Air Separator"]
    E --> F["Boiler"]
    F --> G["Relief Valve"]
    G --> H["Drain Valve"]
    H --> I["System Return"]
    J["Fill Valve Assembly"] --> K["EXTROL"]
    K --> F

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.

WORTHINGTON

INDUSTRIES

1400 Division Road, West Warwick, RI USA 02893

T: 800.426.8765 www.amtrol.com

© 2021 Worthington Industries Inc.

One or more features of this product are covered by U.S. patents, visit www.amtrol.com/patents for more information.

Part #: 9015-941 (05/21)