Heat Transfer TX Series Installation, Operation And Maintenance Manual
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Heat Transfer TX Series Installation, Operation And Maintenance Manual

Indirect water heater
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TX Indirect Water Heater
This manual applies to the following models:
TX-40
TX-50
TX-80
TX-110
The surfaces of these products contacted by
potable (consumable) water contain less than
0.25% lead by weight as required by the Safe
Drinking Water Act, Section 1417.
Product Information:
This user manual must always accompany the specific unit as recorded below.
Model #:
Serial #:
Installation Date:
Wholesaler Name:
Contractor Name:
Additional Information:
Latest Update: August 11, 2020
The information contained in this document is subject to change without notice from Diversified Heat Transfer, Inc. (DHT). DHT makes no
warranty of any kind in respect to this material, including, but not limited to, implied warranties of merchantability and fitness for a particular
application. DHT is not liable for errors appearing in this document, nor for incidental or consequential damages occurring in connection with
the furnishing, performance, or use of these materials.
NOTE:
Diversified Heat Transfer, Inc.  439 Main Road, Route 202  Towaco, New Jersey 07082
DISCLAIMER
Phone: 800-221-1522  Website: www.dhtnet.com
Installation, Operation, and
Maintenance Manual
Page 1 of 33

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  • Page 1 DISCLAIMER The information contained in this document is subject to change without notice from Diversified Heat Transfer, Inc. (DHT). DHT makes no warranty of any kind in respect to this material, including, but not limited to, implied warranties of merchantability and fitness for a particular application.

  • Page 2: Table Of Contents

    Troubleshooting ............................. 24 Parts and Accessories ..........................26 SECTION 7: WARRANTY ..........................27 SECTON 1: SAFETY Diversified Heat Transfer, Inc.  439 Main Road, Route 202  Towaco, New Jersey 07082 Page 2 of 33 Phone: 800-221-1522  Website: www.dhtnet.com...

  • Page 3: Section 1: Safety

    5. DO NOT thread, plug, or cap the relief pipe opening. Diversified Heat Transfer, Inc.  439 Main Road, Route 202  Towaco, New Jersey 07082 Page 3 of 33 Phone: 800-221-1522  Website: www.dhtnet.com...

  • Page 4: Section 2: Product Selection/Performance

    Temperature limiting valves are available; see manual. NOTE: The TX Series Indirect Water Heater is deemed to be used in a "commercial setting" if at any time the unit is operated at a temperature over 150°F. Refer to warranty for additional information.
  • Page 5 Some applications, such as laundry machines and dishwashers, may require a higher temperature. Ratings can be improved by increasing the TX Series thermostat setting and using a mixing valve to temper the hot water to the proper temperature. When temperatures greater than 119°F are required, use a mixing valve at the outlet of the water heater or anti-scald fittings at point of use.

  • Page 6: Section 3: Tank Specifications

    1” 1” 1” Control ½” ½” ½” Boiler Water Inlet (Supply) 1” 1” 1” Recirculation ¾” Diversified Heat Transfer, Inc.  439 Main Road, Route 202  Towaco, New Jersey 07082 Page 6 of 33 Phone: 800-221-1522  Website: www.dhtnet.com...
  • Page 7 Recirculation ¾” NOTE: Refer to TX Series dimensional drawing available on DHT website for most up-to-date, complete dimensional details and connection orientations. Diversified Heat Transfer, Inc.  439 Main Road, Route 202  Towaco, New Jersey 07082 Page 7 of 33...
  • Page 8 TX Series Installation, Operation, and Maintenance Manual TX Series Dimensional Drawing Diversified Heat Transfer, Inc.  439 Main Road, Route 202  Towaco, New Jersey 07082 Page 8 of 33 Phone: 800-221-1522  Website: www.dhtnet.com...

  • Page 9: Section 4: Installation & Piping

    Dielectric Unions (recommended) - used to electrically isolate the TX Series tank from the connected domestic water piping. This helps to minimize the possibility of corrosion damage. Diversified Heat Transfer, Inc.  439 Main Road, Route 202  Towaco, New Jersey 07082 Page 9 of 33 Phone: 800-221-1522  Website: www.dhtnet.com...
  • Page 10 90º Elbow 45º Elbow Tee, Run ½ ½ Tee, Branch 90º Bend 180º Bend Gate Valve Diversified Heat Transfer, Inc.  439 Main Road, Route 202  Towaco, New Jersey 07082 Page 10 of 33 Phone: 800-221-1522  Website: www.dhtnet.com...
  • Page 11 Risk of scalding is not eliminated with the use of a thermostatic mixing valve. Refer to literature provided by valve manufacturers for recommended installation. Diversified Heat Transfer, Inc.  439 Main Road, Route 202  Towaco, New Jersey 07082 Page 11 of 33...
  • Page 12 Temperature & Pressure Relief Valve (T&P) A T&P is required on all TX Series Indirect Water Heaters. Install a T&P valve (long element type) into the tapping designated for the T & P.
  • Page 13 Removal of the T&P, or failure to replace temperature-pressure relief valve, will release the manufacturer from any claim which might result from excessive temperatures and pressures. Diversified Heat Transfer, Inc.  439 Main Road, Route 202  Towaco, New Jersey 07082 Page 13 of 33...

  • Page 14: Tank Installation

    TX Series Installation, Operation, and Maintenance Manual SECTON 4.3: TANK INSTALLATION SINGLE UNIT INSTALLATION Diversified Heat Transfer, Inc.  439 Main Road, Route 202  Towaco, New Jersey 07082 Page 14 of 33 Phone: 800-221-1522  Website: www.dhtnet.com...
  • Page 15  Recirculation line connections available only for TX-80 and TX-110 unit models. Multi Units Installation Diversified Heat Transfer, Inc.  439 Main Road, Route 202  Towaco, New Jersey 07082 Page 15 of 33 Phone: 800-221-1522  Website: www.dhtnet.com...

  • Page 16: Piping Installation Instructions For Use With A Steam Boiler

    8. When the power is switched on, the tank aquastat will turn on pump F, and when the temperature of the boiler falls below the set-point, the boiler will fire. Diversified Heat Transfer, Inc.  439 Main Road, Route 202  Towaco, New Jersey 07082 Page 16 of 33...

  • Page 17: Section 5: Electrical And Controls Wiring

    The entire heating system should have its own designated electrical circuit. The TX Series water heater operates in much the same way as an additional heating zone, either utilizing the same circulator as household heating or its own circulator. The water heater temperature is maintained by the use of an immersion type aquastat.
  • Page 18 Operation: When any thermostat calls for heat, the boiler is given a signal to start. The appropriate circulator is energized only when the boiler temperature is above the set low limit. Diversified Heat Transfer, Inc.  439 Main Road, Route 202  Towaco, New Jersey 07082 Page 18 of 33...
  • Page 19 5°F to 30°F. It is set at 120°F set point with 5°F differential. COLD START BOILER APPLICATION Diversified Heat Transfer, Inc.  439 Main Road, Route 202  Towaco, New Jersey 07082 Page 19 of 33 Phone: 800-221-1522  Website: www.dhtnet.com...
  • Page 20 Power Input: Connect 120 volt as power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H. Diversified Heat Transfer, Inc.  439 Main Road, Route 202  Towaco, New Jersey 07082 Page 20 of 33...
  • Page 21 TX Series Installation, Operation, and Maintenance Manual Diversified Heat Transfer, Inc.  439 Main Road, Route 202  Towaco, New Jersey 07082 Page 21 of 33 Phone: 800-221-1522  Website: www.dhtnet.com...
  • Page 22 TX Series Installation, Operation, and Maintenance Manual Diversified Heat Transfer, Inc.  439 Main Road, Route 202  Towaco, New Jersey 07082 Page 22 of 33 Phone: 800-221-1522  Website: www.dhtnet.com...

  • Page 23: Section 6: Maintenance

    Check all domestic and boiler water piping, joints, valves, and other fittings for any signs of leakage. Repair or replace if necessary. Diversified Heat Transfer, Inc.  439 Main Road, Route 202  Towaco, New Jersey 07082 Page 23 of 33...

  • Page 24: Troubleshooting

    TX Series Installation, Operation, and Maintenance Manual SECTON 6.2: TROUBLESHOOTING The following table summarizes the problems that may be encountered over the life of a DHT TX Series Water Heater, and the procedures to remedy those problems. SYMPTOM PROBABLE CAUSE(S) REMEDY 1.
  • Page 25 3. Incorrect boiler 3. Increase boiler temperature limit settings. temperature limit settings. Diversified Heat Transfer, Inc.  439 Main Road, Route 202  Towaco, New Jersey 07082 Page 25 of 33 Phone: 800-221-1522  Website: www.dhtnet.com...

  • Page 26: Parts And Accessories

    The following is a list of typical parts that are generally replaceable by personnel trained/certified on DHT, Inc., TX Series water heaters. The replaceable parts may vary, depending on the unit and the particular design specifications in which the unit was constructed. If there are questions concerning the replaceable parts for the unit, refer to the original design specifications, or contact DHT, Inc.
  • Page 27 Diversified Heat Transfer unless in writing and signed by a duly authorized officer of Diversified Heat Transfer. Diversified Heat Transfer does not assume or authorize any other person to assume for it any other liability in connection with the sale of its products.
  • Page 28 If Diversified Heat Transfer is unable to repair or replace or otherwise comply with its liability under these warranties, after a reasonable number of attempts, then the original consumer purchaser’s sole and exclusive remedy for such a breach shall be either a replacement product or a full refund of the purchase price (exclusive of freight, labor, and installation), as determined by Diversified Heat Transfer.

  • Page 29: Section 7: Warranty

    If Diversified Heat Transfer is unable to repair or replace or otherwise comply with its liability under these warranties, after a reasonable number of attempts, then the original business purchaser’s sole Diversified Heat Transfer, Inc.
  • Page 30 WARRANTY COVERAGE FOR INDUSTRIAL USAGE - 5 YEARS (1 YEAR PARTS) The warranties listed in this section shall apply to Diversified Heat Transfer TX indirect-fired water heaters used in an industrial setting by original consumer purchasers only. An “industrial setting” as used herein shall mean any usage not falling within the above definition of a “commercial setting.”...
  • Page 31 If Diversified Heat Transfer is unable to repair or replace or otherwise comply with its liability under these warranties, after a reasonable number of attempts, then the original business purchaser’s sole and exclusive remedy for such a breach shall be either a replacement product or a full refund of the purchase price (exclusive of freight, labor, and installation), as determined by Diversified Heat Transfer.
  • Page 32 Malfunctions resulting from or repairs necessitated by, uses of the indirect-fired water heater for purposes other than that for which it was designed, or resulting from flood, fire, or wind. Diversified Heat Transfer, Inc.  439 Main Road, Route 202  Towaco, New Jersey 07082 Page 32 of 33...
  • Page 33 At the time a claim is filed, the original purchaser must present a copy of the original sales receipt, installation bill, proof of delivery, or equivalent documents evidencing both ownership of the TX Series indirect-fired water heater and installation in the dwelling or commercial property owned by the original purchaser.

This manual is also suitable for:

Tx-40Tx-50Tx-80Tx-110

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