Flexcon Flex 2 Pro HTX Series User manual

  
   HYDRONIC  

 This product contains a chemical known to the State of
California to cause cancer and birth defects or other reproductive harm.
(California installer-California law requires that this notice be given to the
consumer/end user of this product.) For more information, contact the
manufacturer at www.flexconind.com.
These instructions and warnings are subject to periodic updates on the
Flexcon website www.flexconind.com and should be regularly reviewed
by the consumer for important safety and instruction updates.



HTX/SXHT      
   8Rev. 6.18
    
If the Product is not correctly installed, operated, repaired or maintained as described in the Manual provided with the Product.
To any failure or malfunction resulting from (i) misuse or abuse, (ii) improper or negligent handling, shipping (by anyone other than Flexcon),
storage, use or operation, or (iii) damages to the tank caused by lightning, floods, fire, freezing or any other environmental condition.
To damages caused by any unauthorized alteration to the Product, or any attempt to repair tank leaks or parts.
To any failure or problem resulting from the use of the Product for any purpose other than those specified in the Manual.
If the Product is used anywhere except the United States, its territories or possessions, or Canada.
To labor costs, shipping charges, service charges, delivery expenses, administrative fees or any costs incurred in removing or reinstalling the Products.
To any claims submitted to Flexcon or a Flexcon authorized distributor or dealer more than 30 days after expiration of the applicable warranty time
period described in this Warranty;
To any repair or replacement costs not authorized in advance by Flexcon.
  - All implied warranties including the implied warranties of merchantability and fitness for a particular purpose are
specifically disclaimed.
 - The remedies contained in this warranty are the purchaser’s or first user’s exclusive remedies. In no circumstances
will Flexcon be liable for more than, and purchaser-first user’s remedies shall not exceed, the price paid for the Product. In no case shall Flexcon
be liable for any special, indirect, incidental or consequential damages, whether resulting from non-delivery or from the use, misuse, or inability to
use the Product or from defects in the product or from Flexcon’s own negligence or other tort. These exclusions apply regardless of whether such
damages are sought for breach of warranty, breach of contract, negligence, strict liability, in tort or under any other legal theory. Excluded damages
include, but are not limited to, inconvenience, loss or damage to property, mold, loss of profits, loss of savings or revenue, loss of use of the
Products or any associated equipment, facilities, buildings or services, downtime, and the claims of third parties including customers.
 – You must notify the authorized Flexcon distributor or dealer who sold you
the Product within 30 days of the event leading to the Warranty claim. Any covered Warranty service must be authorized by the Flexcon distributor
or dealer which sold you the Product. If you do not receive a prompt response, call Flexcon directly at 781.986.2424. Notice of a Warranty claim
should be submitted within 60 days of the event leading to the claim by the authorized distributor/dealer to Flexcon at the following address:
Flexcon Industries, Warranty Claim Dept., P.O. Box 782, Randolph, MA 02368
Before Flexcon determines to provide any replacement part or Product, it may, as a pre-condition to making such a determination, require that the
warranty claimant ship the Product, postage prepaid, to an authorized Flexcon distributor, or to Flexcon, and provide proof of purchase evidenced
by the original sales receipt.
   - In case of replacement of a Product or any component part, Flexcon reserves the right to make changes in
the design, construction, or material of the substitute components or products, which shall be subject to all of the terms and limitations of this
Warranty, except that the applicable warranty periods shall be reduced by the amount of time the warranty claimant owned the product prior to
submitting notification or the warranty claim.
Owners Record Keep for later use
Serial number (see tank data label at bottom of tank): __________________________________________________________________________
Model (see tank data label at bottom of tank): _______________________________________________________________________________
Date Installed: _________________________________________________________________________________________________________
Installer Name: _________________________________________________________________________________________________________
Telephone number: ____________________________________________________________________________________________________
Retain copy of cancelled check and installation receipt
   
DESCRIPTION
Flexcon hydronic expansion tanks are designed to accommodate
the natural expansion of water in a hydronic (forced hot water)
heating system. When water heats up, it expands and in a closed
system can cause unsafe operating pressures and nusiance
operation of the boiler relief valve. These tanks are not to be used in
open or potable (domestic) water systems. The air and water is
permanently separated in a Flexcon tank by a 100% butyl rubber
diaphragm.
8Rev. 6.18

 HYDRONIC       

Important: Read carefully the installation,operating and maintenance instructions manual ("Manual") to avoid serious personal injury and/or
property damage and to ensure safe use and proper care of this product.
Warranty: Warranty is extended to all purchasers of the new product. The warranty is non-transferable. Flexcon warrants to the purchaser or
first user of the new product that at the time of manufacture, the product is free from defect in material or workmanship for (5) years from the date
of manufacture. Any warranty claim must be made within (5) years unless another time period is set forth in the manual, measured from the date
of manufacture.
In the event of a breach of the foregoing warranty and upon proper and timely notification to Flexcon, Flexcon will at its option either:
make repairs to correct and defect in material or workmanship, or supply and ship either new or used replacement parts or products. Flexcon will
not accept any claims for, nor will Flexcon be responsible for, any other costs including labor
Exclusions: This warranty does not cover any failure or problem unless it was caused by a defect in material or workmanship. In addition,
this warranty shall not apply:

This product
must be in-
stalled by a Qualified Professional fol-
lowing all local and national plumbing and
electrical codes. Read and understand
fully the instructions included here and
those on the Flexcon website which are
updated on a regular basis. This product
must be inspected annually by a qualified
professional for any signs of corrosion or
leakage and replaced immediately if
these signs are present. Failure to follow
these instructions may result in serious
injury, death, and/or property damage
and will void the product warranty.
EXPLOSION HAZARD This expansion tank
is designed for water storage at a maximum
pressure of 100 PSI and a maximum temperature of 240 F. A properly
sized pressure relief valve set to local code must be installed on the
system. This tank is shipped with a pre-charge of 12 PSI and any
adjustment to the pre-charge must be done prior to installation and at
ambient temperature. Do not adjust the pre-charge of this tank if the
product is corroded or damaged or shows any signs of diminished
integrity. Do not adjust the pre-charge of the expansion tank with the
system under pressure. Failure to follow these instructions is UNSAFE
and may result in serious injury, death, and/or property damage.
This expansion tank and the associated
piping will in time leak. This tank must be installed in a location that
allows for easy access, visual inspection and where water leakage will
not cause property damage. Installation must include a means for
adequate drainage. This tank must not be installed in a location that is
subject to freezing. This tank must be installed in the vertical position.
The manufacturer of this product is not liable or responsible for any
water damage associciated with the installation and/or failure of this
product. Failure to follow these instructions will void the warranty and
may result in serious injury, death, and/or property damage.
This tank is intended for use on closed
water systems only and any other use may
be dangerous and void the warranty. This products performance and
lifespan can be significantly and adversely impacted by aggressive
water conditions. A water test should be conducted at regular, periodic
intervals specifically looking for corrosive water, acids and other
relevant water contaminants which, if present, must be treated
immediately and appropriately. The system piping must be properly
grounded to earth and a di-electric union is recommended in the
installation. Failure to follow these instructions may result in serious
injury, death, and/or property damage.
THIS IS THE SAFETY ALERT SYMBOL. IT IS USED
TO ALERT YOU TO POTENTIAL PERSONAL
INJURY HAZARDS. OBEY ALL SAFETY
MESSAGES THAT FOLLOW THIS SYMBOL TO
AVOID POSSIBLE INJURY OR DEATH.
WARNING
INDICATES A POTENTIALLY HAZARDOUS
SITUATION WHICH, IF NOT AVOIDED, COULD
RESULT IN SERIOUS INJURY, DEATH, AND/OR
SIGNIFICANT PROPERTY DAMAGE.



This expansion tank and the entire system must be checked annually by a qualified professional.
Visually examine the tank and its connection to the system piping looking for any signs of water leakage or corrosion on the
exterior of the tank or the connection.
If this expansion tank shows any visible signs of leaking, corrosion or rusting, the tank must be replaced
immediately to avoid personal injury or property damage. Do not adjust the tank air pressure if there
are any signs of corrosion on the tank. Failure to follow these instructions may result in serious injury or death and or
property damage.

D I ME N S I ON S & C A P A C I T I E S
Rev. 6.18

               
 
Visually inspect the product for any signs of damage that may have occurred during transportation. If the tank is dented, bent
or scratched, return the product to the original purchase point for replacement.
 
This expansion tank is shipped from the factory with a pre-charge of 12 psi. Any adjustments to the factory pre-charge
must be done prior to initial tank installation and with 0 psi pressure on the system. DO NOT ADJUST THE PRE-CHARGE
OF THE EXPANSION TANK WITH THE SYSTEM UNDER PRESSURE!
The expansion tank should be pre-charged to match the boiler fill valve setting.
failure to properly adjust the pre-charge will shorten the life expectancy of the product.
   
Remove the protective cap from the air valve.
Check the tank pre-charge pressure using a standard tire pressure gauge.
If required add air to the tank using a manual bicycle tire pump until the proper pre-charge pressure is reached.
Replace the protective cap on the air valve.

TYPICAL INSTALLATIONS
P.O.
Inlet To
System
In Line
Expansion
Pressure
Relief
Valve
Auto Fill
Valve
Air
Separator
Flow
Check
Air
Vent
P.O.
Vertical
Floor
Mount
Expansion
Tank
Inlet To
System
Pressure
Relief
Valve
Auto Fill
Valve
Air
Separator
Flow
Check
Air
Vent
SXHT
SERIES
HTX
SERIES
MATERIALS OF CONSTRUCTION
Tank: 16-gauge, cold rolled steel
Finish: Appliance quality paint for corrosion resistance
Water Chamber SXHT: Top diaphragm is 100 % butyl rubber, lower
water chamber is copolymer polypropylene
Diaphragm Material HTX: 100% butyl rubber
Connection: Welded steel
Testing: High pressure, seam weld, helium, final pre-charge check
Air Valve: Brass valvewith o-ring seal
Warranty: 5 years
Boiler
Output
1000’s
BTUH
Copper
Baseboard
& Radiant
Type of Radiation
Convectors & Unit Cast Iron Cast Iron
Heaters Radiators Baseboard
25 HTX 15 HTX 15 HTX 15 HTX 15
50 HTX 15 HTX 30 HTX 30 HTX 30
75 HTX 30 HTX 30 HTX 60 HTX 60
100 HTX 30 HTX 30 HTX 60 HTX 60
125 HTX 30 HTX 60 HTX 60 HTX 60
150 HTX 30 HTX 60 HTX 90 HTX 90
175 HTX 60 HTX 60 HTX 90 HTX 90
200 HTX 60 HTX 60 HTX 90 HTX 90
250 SXHT 30 SXHT 30 SXHT 40 SXHT 30
300 SXHT 30 SXHT 40 SXHT 40 SXHT 30
350 SXHT 30 SXHT 40 SXHT 60 SXHT 40
400 SXHT 30 SXHT 60 SXHT 90 SXHT 40
500 SXHT 40 SXHT 60 SXHT 90 SXHT 40
600 SXHT 40 SXHT 90 SXHT 90 SXHT 60
700 SXHT 60 SXHT 90 SXHT 90 SXHT 60
800 SXHT 60 SXHT 110 SXHT 110 SXHT 90
900 SXHT 60 SXHT 110 SXHT 110 SXHT 90
1000 SXHT 90 SXHT 110 SXHT 110 SXHT 90
1. Drain boiler system or isolate the area where expansion
tank will be installed.
2. Install expansion tank on supply side of the boiler, on
the suction side of the circulator. Adequate thread sealant
(pipe dope) must be added to ensure a leak free
installation.
3. Connect system piping to discharge opening of the tank
using a tee, air scoop, or other suitable tapping in the
system.
4. Pressurize the system and check for leaks.
5. Restart the boiler system.
The tank (HTX) is designed to be supported by system piping. Make
sure that there is adequate means of supporting the system piping
and, if necessary, add strapping, brackets, or pipe hangars.
DO NOT INSTALL THIS EXPANSION TANK IN THE HORIZONTAL
POSITION.
Maximum working pressure 100 psig. Maximum working temperature, 240 F. Tank pre-charge 12 psig.
Note: HTX series expansion tanks ARE NOT suitable for potable water and are only to be used on closed systems.
Model Capacity
(gallons)
Acceptance
Volume
(@12/30 PSIG)
Max.
Acceptance
Volume
Dimensions
(inches) Weight
(lbs)
Connection
Size
(C)
Diameter
(B)
Height
(A)
HTX 15 2.1.85 1.0 ½” MPT 8 11.6 6
HTX 30 4.8 1.9 2.4 ½” MPT11 14.5 10
HTX 60 6.0 2.9 3.6 ½” MPT11.4 17.6 11
HTX 90 15.0 6.0 6.0 ¾” MPT16 20.8 28
SXHT 3015.0 6.0 6.0 1” FPT 16 21.7 32
SXHT 4020.0 8.0 8.0 1” FPT 16 28.8 39
SXHT 6033.0 13.3 13.3 1” FPT 16 42.8 57
SXHT 9044.0 17.7 17.7 1¼” FPT 21 36.2 72
SXHT 110 62.0 24.9 24.9 1¼” FPT 21 47.9 112
SXHT 160 81.0 32.6 32.6 1¼” FPT 21 62.0 123
QUICK SIZING CHART
HTX SERIESHTX SERIES
A
B
C
SXHT SERIES
A
B
C