PLEASE READ THE FOLLOWING INSTRUCTIONS CAREFULLY
IMPORTANT GENERAL SAFETY INFORMATION -
ADDITIONAL SPECIFIC SAFETY ALERTS APPEAR IN THE FOLLOWING INSTRUCTIONS.
FILL-TROL
®
is a combination of an EXTROL
®
expansion tank and
a specially designed automatic pressure reducing valve. Together,
they manage water expansion to provide satisfactory heating system
performance.
The EXTROL is pre-charged at the factory to 12 PSIG and is ready
to install in most residential and light commercial systems without
adjustment. The valve is designed to fill the system with water and
automatically shut off the flow when it reaches the precharge pressure
in the tank. It will also restore the system to 12 PSIG if the pressure
drops below that point. The precharge may be changed to set the
desired fill pressure.
Pre-Installation
1 Visually inspect for any damage. Ensure expansion tank is sized
properly for application (Figure 1).
2. Remove plastic cap from air valve.
3. With tank empty of water, adjust air precharge to desired system fill
pressure. Unit is shipped at 12 PSIG.
4. Replace and tighten plastic cap on air valve.
FAILURE TO PROPERLY SEAL VALVE CAP
WILL RESULT IN LOSS OF PRECHARGE
CAUSING PRODUCT TO FAIL.
Installation
1. Drain the boiler system or isolate the area where the unit will
be installed.
2. Install the unit on the supply side of the boiler, on the suction-side of
the heating circulator(s) (Figure 2).
Mount tank vertically only. Ensure the piping
can support the entire weight of the tank when
full of water.
Do not install on a dead-end pipe or wherever
air can collect; causing internal corrosion and
possible leakage.
3. Make connection to system with 1/2" pipe nipple from tapping marked
SYSTEM.
4. Connect cold water supply to 1/2" compression fitting connection at
SUPPLY.
5. Pressurize the system and check for leaks. Repair as necessary.
6. Restart the boiler system and check for relief valve discharge. If the
relief valve drips, the tank may be improperly charged or undersized.
7. The unit is now operational and will absorb expanded water during
boiler operation.
Maintenance
To remove screen in Fill-Trol valve for cleaning, shut off main water
supply to heating system and remove compression nut.
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 amount 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.
Be sure to maintain the proper precharge whenever the tank
is inspected.
Operation
Water enters the Fill-Trol valve through the 1/2" compression fitting
connection, passes through the removable strainer and pushes open
the spring-loaded check valve. It then flows through the automatic shut-
off valve which is held in the open position by the diaphragm pushing
against the pressure plate. This raises the fill-gate stem and compresses
the automatic shut-off valve spring allowing water to flow into the heating
system. It is the charge pressure in the tank that forces the diaphragm
into position.
As the system reaches the fill pressure, the diaphragm moves, allowing
the automatic shut-off valve to close.
When the system falls below the fill pressure, the diaphragm again
pushes open the automatic shut-off valve, allowing water to flow into the
system and restore system pressure.
The Fill-Trol is shipped with a factory precharge of 12 PSIG which
automatically sets the minimum fill pressure to 12 PSIG. Other minimum
fill pressures my be used by increasing or decreasing the air charge in the
tank. Carefully follow the instructions for changing the air charge.
Warranty
FT Models: Five (5) Year Limited Warranty
Visit www.amtrol.com for complete warranty details.
Figure 1.
Figure 2.
System
Supply
Flow-Check
Valve
Circulator
Air
Purger
Air Vent
Fill-Trol
Expansion
Tank
Fill-Trol Valve
Relief
Valve
Boiler
System
Return
Shut-Off
Valve
Water
Supply
Pressure-
Reducing
Valve
Shut-Off
Valve
System
Purge
Backflow
Preventer
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
FT-109
FT-109
FT-109
FT-109
50
FT-109
FT-109
FT-110
FT-110
75
FT-110
FT-110
FT-110
FT-111
100
FT-110
FT-110
FT-111
FT-111
125
FT-110
FT-111
FT-111
NA
150
FT-110
FT-111
NA
NA
175
FT-111
FT-111
NA
NA
200
FT-111
FT-111
NA
NA
250
FT-111
NA
NA
NA
Sizing based on: 12 psig Fill; 30 psig Relief Valve; 200°F Average Temperature.
© 2014 AMTROL Inc.
Part #: 9015-026 (06/14)
Mark of the
Originator
1400 Division Road, West Warwick, RI USA 02893
T: 800.426.8765 F: 800.293.1519
www.amtrol.com
Spring-Loaded
Check Valve
Automatic Shut-Off
Valve Spring
Pipe Nipple
Expansion
Bypass
Automatic
Shut-Off Valve
Pressure Plate
Removable
Strainer
Cold Water
Supply
Fill Gate
Stem
O-Ring Seal
1/2˝ Compression
Fitting Connection
System Pressure
Above Diaphragm
Diaphragm
