Amtrol RX-15, RX-30, RX-60 User Guide

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RADIANT EXTROL

RADIANT HEATING SYSTEM EXPANSION TANKS

INSTALLATION & OPERATION INSTRUCTIONS

Models RX-15, RX-30, RX-60

For Use In Closed Radiant Heating Systems Only

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, shows signs of corrosion, or if indicator cap is discolored, call a licensed 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.

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.

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.

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.

RUPTURE OR EXPLOSION HAZARD. Do not

expose product to freezing temperatures or temperatures in excess of 200° 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.

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.

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.

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.

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PLEASE READ THE FOLLOWING INSTRUCTIONS CAREFULLY

IMPORTANT GENERAL SAFETY INFORMATION -

ADDITIONAL SPECIFIC SAFETY ALERTS APPEAR IN THE FOLLOWING INSTRUCTIONS.

RADIANT EXTROL® 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 application (Figure 1).

2. With tank empty of water, remove plastic cap from air stem (Figure 2).

3. Adjust air precharge to desired system fill pressure. Unit is shipped at 12 PSIG.

4. Replace cap and tighten snugly, ensuring the cap is flush against the tank surface.

FAILURE TO PROPERLY SEAL VALVE CAP

CAUSING PRODUCT TO FAIL.

Figure 1.

Feet of Tubing

1,000 RX-15 RX-15 RX-15 RX-15 RX-15 5,000 RX-15 RX-15 RX-15 RX-30 RX-30 7,500 RX-15 RX-15 RX-30 RX-30 RX-60 10,000 RX-15 RX-30 RX-30 RX-60

14,000 RX-15 RX-30 RX-60 RX-60

18,000 RX-30 RX-60 RX-60 22,000 RX-30 RX-60 30,000 RX-30 RX-60

Sizing based on: Fill Pressure 12 psig; Relief Pressure 30 psig; Average Temperature 120° F; System filled with water. For glycol applications, consult AMTROL Technical Support.

3/8" 1/2" 5/8" 3/4" 1"

Figure 2.

Precharge Adjustment: In-Line Models Shown

Remove cap and

charge to system

fill pressure.

Installation

1. Drain the boiler system or isolate the area where the Radiant Extrol will be installed.

2. Install the Radiant Extrol on the supply side of the boiler, on the suction-side of the heating circulator(s) (Figure 3).

Mount tank vertically only. Ensure the piping

full of water.

3. Once the Radiant Extrol is installed, re-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.

5. The Radiant Extrol is now operational and will absorb expanded water during boiler operation.

WILL RESULT IN LOSS OF PRECHARGE

Radiant Extrol Sizing

Nominal Pex Tubing Size

RX-60

can support the entire weight of the tank when

RX-60

Contact Amtrol

Replace InSight™ Service Indicator Cap and tighten until flush with tank.

Figure 3.

Heating Zone(s)

Air Eliminator

Radiant

EXTROL

InSight Cap

Return

System Fill

Boiler

Relief Valve

Operation

1. The Radiant Extrol is installed on the supply-side of the boiler system. Its sealed-in air precharge prevents water from entering the tank until the system pressure begins to rise.

2. As the water temperature rises, water enters the Radiant Extrol.

3. As the system cools, the diaphragm is forced downward. Water is expelled from the Radiant Extrol, back into the heating system.

NOTE:

Although the Radiant Extrol 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.

Maintenance

A licensed professional 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 InSight™ Service Indicator Cap for discoloration (Figure 4) in addition to regular product inspection. Contact the installer or a plumbing professional if indicator cap is discolored; tank replacement required. Do not rely on cap as sole indication of tank condition.

Figure 4.

InSight™ Service Indicator Cap (Inline models only)

Normal

Operation

Clear / White

Replace

Tank

Discolored

Warranty

RX Models: Seven (7) Year Limited Warranty

Visit www.amtrol.com for complete warranty details.

1400 Division Road, West Warwick, RI USA 02893 T: 800.426.8765 www.amtrol.com