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TX Series Installation, Operation, and Maintenance Manual 

 

Diversified Heat Transfer, Inc. 

  439 Main Road, Route 202  

  Towaco, New Jersey 07082  

 Page 

26

 of 

33

 

  

                      Phone: 800-221-1522   

  Website: www.dhtnet.com 

  

 

SECTON 6.3:      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. 

 

NOTE:  

All replacement parts of unit can be ordered directly from your local authorized DHT sales 
representative/agent. Please have the unit’s model and serial number available before contacting. 

 

 

ITEM NO. 

PART NO. 

QUANTITY 

DESCRIPTION 

RB450-TX-40 

TX-40 TX SERIES INDIRECT WH 

RB450-TX-50 

TX-50 TX SERIES INDIRECT WH 

RB450-TX-80 

TX-80 TX SERIES INDIRECT WH 

RB450-TX-110 

TX-110 TX SERIES INDIRECT WH 

MELE-04-0005 

AQUASTAT (FOR USA ONLY) 

MELE-04-0002 

AQUASTAT (FOR CANADA ONLY) 

RB450-WELLS 

AQUASTAT WELL 

MPART-E-RV1-0006 

T&P RELIEF VALVE 

MPART-E-05-0001 

DRAIN VALVE 

RB450-TX-LEGS 

LEGS 

RB450-TX-BUSHING 

S.S. REDUCING BUSHING – 1” x ¾” 

(FOR: MODELS TX-40, TX-50 & TX-80) 

RB450-TX-40-CARTONS 

CARTONS TX-40 

RB450-TX-50-CARTONS 

CARTONS TX-50 

RB450-TX-80-CARTONS 

CARTONS TX-80 

RB450-TX-110-CARTONS 

CARTONS TX-110 

 

 

 

Summary of Contents for TX Series

Page 1: ...MER 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 occurrin...

Page 2: ...is manual For assistance or additional information consult a qualified Installer or Service Agency FOR YOUR SAFETY Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance Installation and service must be performed by a qualified Installer or Service Agency Table of Contents SECTION 1 SAFETY 3 Relief Valve Requirements 3 SECTION 2 PRODUCT SE...

Page 3: ... located in an area not subject to freezing temperatures in any location selected It is recommended that a suitable drain pan be installed under the water heater This pan shall be a minimum of 50mm 2 in deep and have a diameter that is a minimum of 50mm 2 in greater than the diameter of the water heater Suitable piping shall connect the drain pan to a properly operating floor drain SECTON 1 1 Reli...

Page 4: ... period and provides thermal mass for storage This helps to reduce the number of cycles on boiler under the periods of no load to low load conditions and ensures there is always hot water present Domestic cold water enters the unit through the cold water inlet connection toward the bottom of the tank and hot water is supplied through the connection on top see Section 3 If the tank temperature fall...

Page 5: ...e Most residential usage will be satisfied with 120 F water the temperature setting recommended by the Consumer Product Safety Commission 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 greate...

Page 6: ...A Domestic Cold Water Inlet 4 8 4 8 9 0 B Control 21 5 24 8 27 0 C Recirculation n a n a 44 7 D Boiler Water Inlet Feed 38 4 46 3 63 4 D Boiler Water Outlet Return 38 4 46 3 63 4 E Domestic Hot Water Outlet 36 8 44 7 61 8 Overall Tank 38 9 46 8 64 3 Coil Surface Square Feet 13 1 15 2 16 8 Net Weight Lbs 86 98 132 Shipping Weight Lbs 94 123 143 Filled Weight Lbs 420 516 792 Connections Temp Press R...

Page 7: ... B Boiler Water Outlet Return 15 1 C Boiler Water Inlet Feed 44 2 D Control 46 1 E Recirculation 52 4 F Domestic Hot Water Outlet 63 4 G Overall Tank 77 0 Coil Surface Square Feet 23 7 Net Weight Lbs 154 Shipping Weight Lbs 176 Filled Weight Lbs 1073 Connections Temp Press Relief Valve Domestic Hot Water Outlet 1 Domestic Cold Water Inlet 1 Boiler Water Outlet Return 1 Control Boiler Water Inlet S...

Page 8: ...s Installation Operation and Maintenance Manual 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 TX Series Dimensional Drawing ...

Page 9: ...of supporting the tank when filled with water Refer to Table at right FOR YOUR SAFETY Do not store or use gasoline or other flammable vapors or liquids in the vicinity of this or any other appliance Controls on this appliance could ignite vapors causing an explosion SECTON 4 2 PIPING INSTALLATION INSTRUCTIONS 1 General a All plumbing must be in accordance with the requirements of the authority hav...

Page 10: ...er Pressure Drop Ft Hd Boiler Water Connection Sizes TX 40 10 GPM 7 1 1 TX 50 10 GPM 7 3 1 TX 80 14 GPM 5 0 1 TX 110 14 GPM 6 5 1 Friction Loss per 100 Feet of Tubing psi Tubing Type Flow Rate gpm 10 gpm 15 gpm Type K 3 1 psi 6 5 psi Type L 2 7 psi 5 7 psi Type M 2 3 psi 4 7 psi Friction Loss Allowance for Copper Fittings feet of straight tubing Fitting Wrought Cast 90º Elbow 1 4 45º Elbow 1 2 Tee...

Page 11: ...e of service as shown in the exhibit below b Standard Domestic Hot Water Out A heat trap will improve energy efficiency by reducing piping heat loss Thermostatic Mixing Valve At times a thermostatic mixing valve may be recommended or required The thermostatic mixing valve blends domestic cold water with hot water exiting from the heater to yield a more constant desired temperature Risk of scalding...

Page 12: ... the domestic cold water line near the heater between the back flow preventer or check valve and the heater see piping diagrams Refer to the Thermal Expansion Tank manufacturer literature for sizing Vacuum Breaker DHT recommends that a vacuum breaker be installed on the domestic piping to the heater The vacuum breaker protects the heater in the event that tank pressure falls below atmospheric pres...

Page 13: ...intains periodic inspection of listed equipment or materials The valve must be oriented provided with tubing or otherwise installed so that discharge can exit only within six 6 inches above or at any distance below the structural floor and cannot contact any electrical part The valve must be piped to an area where discharge will not cause personal injury or damage the surrounding area WARNING TEMP...

Page 14: ...n Operation and Maintenance Manual 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 SECTON 4 3 TANK INSTALLATION SINGLE UNIT INSTALLATION ...

Page 15: ...ovided with unions or flanges maintaining enough clearances for service Dielectric fittings are suggested to make connections between dissimilar metals to prevent galvanic corrosion A check valve may be utilized in place of backflow preventer if permitted by local codes Piping installation components are supplied by others in the field Expansion tank shall be installed whenever a backflow prevente...

Page 16: ... end of hose in an empty bucket or basin 4 Open boiler drains E and D and allow water to fill coil of tank Continue to allow water to flow until the flow is free of air smooth non sputtering flow 5 Close drain D and then boiler drain E 6 Open valves B and C and observe boiler water level at the gauge glass making sure that is remains at its original level 7 Fill the potable water side of the tank ...

Page 17: ...g 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 The aquastat is installed into the immersion well on the heater and secured by tightening the set screw or clamp The aquastat operates in much the same way as a thermostat When the water temperature falls below desired set point ...

Page 18: ...om scalds Children disabled and elderly are at the highest risk of being scalded See instruction manual before setting temperature at water heater Feel water before bathing or showering Temperature limiting valves are available see manual TANKLESS COIL BOILER APPLICATION 10 Operation When any thermostat calls for heat the boiler is given a signal to start The appropriate circulator is energized on...

Page 19: ...ndependently Jumper Placement REMOVE the jumper between terminals ZC and ZR Connect terminal ZC to ZC terminal on the aquastat control Connect terminal ZR to ZR terminal on the aquastat control Confirm polarity is consistent between boiler aquastat and switching relay Power Input Connect 120 volt as power input to terminals N and H Neutral wire to terminal N Hot wire to terminal H NOTE Aquastat Th...

Page 20: ...and X will start the boiler Priority Operation When zone 6 is switched to the priority setting and is actuated all other zones will stop operation until zone 6 is satisfied When zone 6 is not switched to priority all zones will operate independently Jumper Placement The jumper should be placed between terminals ZC and ZR Connect the isolated end switch to the aquastat control on the boiler Power I...

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: ...bottom of the tank until the water is clear 2 Inspect the tank for any deposits of lime or sediment 3 Remove lime scale or deposits using care not to damage the tank lining Temperature Pressure Relief Valve Every 12 months 1 Before manually testing the T P relief valve make sure the valve is piped in a manner that will not cause harm or damage any surrounding area 2 Manually open the relief valve ...

Page 24: ...trical power supply is available 4 Check the power supply and inspect the circulation pump for proper operation Repair or replace the circulator if not functioning properly 5 Clean the heat exchanger coil per instructions Call DHT or your authorized representative for instructions on repair or replacement if necessary Also ensure the water quality levels are within the allowable limits 6 Blowdown ...

Page 25: ...ing the system water pressure below the relief valve setting 3 Inspect and adjust or replace the relief valve if it has failed Contact DHT representative for replacement 4 Check and readjust as necessary Replace the aquastat if faulty A loud banging noise in the water heater or water piping not to be confused with a normal clicking noise made during operation 1 Water return piping has not been ins...

Page 26: ...T Inc NOTE All replacement parts of unit can be ordered directly from your local authorized DHT sales representative agent Please have the unit s model and serial number available before contacting ITEM NO PART NO QUANTITY DESCRIPTION 1 RB450 TX 40 1 TX 40 TX SERIES INDIRECT WH RB450 TX 50 TX 50 TX SERIES INDIRECT WH RB450 TX 80 TX 80 TX SERIES INDIRECT WH RB450 TX 110 TX 110 TX SERIES INDIRECT WH...

Page 27: ...versified 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 THIS WARRANTY EXTENDS ONLY TO THE FIRST ORIGINAL RETAIL PURCHASER OF THE TANK AND ONLY WHILE THE TANK IS OWNED BY THAT PURCHASER AND REMAINS AT ITS ORIGINAL LOCATION CHANGE IN OWNERSHIP OR RELOCATION OF THE TANK SHALL FOREW...

Page 28: ...not provide proof of purchase then DHT may request proof of residency dating back to the date of manufacture of the tank In such a case the warranty period will begin from the date of manufacture as determined by the tank serial number OWNER RESPONSIBILITIES The Owner or Qualified installer Service Technician must A Maintain the water heater in accordance with the maintenance procedure list in the...

Page 29: ...r heater shall be eight 8 years from the date of manufacture of the indirect fired water heater as determined by the tank serial number During the specified warranty period of the indirect fired water heater Diversified Heat Transfer Inc will repair or replace at its option without charge any indirect fired water heater having a defect or malfunction that results in a water leak from the outside j...

Page 30: ... I 150 ppm chlorides for commercial use b PH between 6 0 and 8 0 c Hardness not higher than 7 0 F Ensure that the product is not supplied or operated by any form of water softeners with ion exchange filter that is regenerated by salt G Water test may be requested if there is question about the water quality with regards to a malfunction of the TX water heater WARRANTY EXCLUSIONS A Production of no...

Page 31: ...o 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 If at the time of a request for s...

Page 32: ... OR INDUSTRIAL APPLICATION For either a residential commercial or industrial application the following applies to both when a replacement tank is provided for a tank found to be under warranty The replacement tank warranty assumes the remaining warranty period left from the original tank purchased A These warranties are void and shall not apply under the following circumstances 1 The TX water heat...

Page 33: ...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 WARRANTY COVERAGE QUESTIONS If you have questions about the coverage of this warranty please contact D...

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