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Manufacturers Of Steam Fired Specialty Equipment
TH-750 SERIES
STEAM FIRED WATER HEATER
OPERATION & MAINTENANCE
MANUAL
READ THIS MANUAL COMPLETELY BEFORE ATTEMPTING START UP
P.O. Box 473639 • Charlotte, NC 28247
12249 Nations Ford Road • Pineville, North Carolina 28134
TH-750-IMI-REV-5
Phone 704.940.1228 • Fax 704.940.1227 • www.thermafloengineering.com
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Summary of Contents for Thermaflow TH-750 Series
- Page 1 Manufacturers Of Steam Fired Specialty Equipment TH-750 SERIES STEAM FIRED WATER HEATER OPERATION & MAINTENANCE MANUAL READ THIS MANUAL COMPLETELY BEFORE ATTEMPTING START UP P.O. Box 473639 • Charlotte, NC 28247 12249 Nations Ford Road • Pineville, North Carolina 28134 TH-750-IMI-REV-5 Phone 704.940.1228 •...
- Page 2 ncorporated ngineering Manufacturers Of Steam Fired Specialty Equipment TH-750 Steam Fired Water Heater Hot Water Outlet Outlet Thermometer 316LStainless Steel ASME Code Stamped Shell and fitting Removable Vinyl Jacket Standard. ASME Pressure and Electronic RTD Sensor Temperature Relief Valve High Temp Dump Solenoid Valve Expanding Crossflow UTube Bundle to remove scale and build-up...
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Page 3: Section 1 - Hookup And Installation
Section 1 – Hookup and Installation 1. The TH-750 should be located in an area so that it will be easily accessible for any inspection and repairs. Secure to the floor using the four mounting holes in the base floor stand. 2. - Page 4 15. The EC800 control panel requires a single-phase 120 V/60Hz power supply. Supply wiring connections are furnished so that only one simple connection is required. Supply circuit should be fitted with a minimum 10 amp breaker with fused disconnect and should comply with local codes.
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Page 5: Section 2 - Startup Procedure And Operation
Section 2 – Startup Procedure and Operation 1. Verify that all manual valves are closed on the water and heat (steam) sources. 2. Locate the black circulation pump On-Off switch (on side of EC800 panel) and make sure that it is in the OFF position. Failure to turn the recirculation pump off will run the pump dry causing failure. - Page 6 EC800 Panel with Electronic Control Circulation Pump Switch located here. 14. Fully open the condensate isolation valve to allow condensate to drain from the steam trap. 15. As the system nears set point, the pressure will begin to drop until the gauge finally reads zero when set point temperature has been achieved.
- Page 7 to open several users and let the system operate for 30-60 minutes before shutting down all hot water users. 20. Recheck the head bolt torque levels and repair any system leaks as required. 21. For TH-750 units with electric control, no instrument air supply is required. Otherwise the startup procedure is the same as for pneumatic control 22.
- Page 8 THIS CONTROLLER HAS BEEN SET UP SO THAT ONLY THE SETPOINT CAN BE CHANGED WITHOUT PASS CODE Process Value Set Point Value Constant light Zone Display equals process is running a 10 = A flashing light equals 11 = B a pause in 12 = C the process...
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Page 9: Section 3 - Shutdown Procedure
Section 3 – Shutdown Procedure 1. Turn off all power to the circulating pump and / or electric controls, if so equipped. 2. Close all valves in the water inlet line (or boiler water / high temperature water line). 3. Relieve the pressure from the energy source line (water, boiler water, or high temperature water), where possible. -
Page 10: Section 4 - Maintenance
Section 4 – Maintenance 1. Gasket creep is inherent to most gasketed joints, and retorquing is required. The greater the operating temperature and pressure, the greater the problem can become. It is imperative that the head bolts be torqued after installation, after initial setup, and inspected several times a year to be sure that the bolts are torqued correctly and there are no leaks. - Page 11 replacement schedule should be kept and adhered to by the operator/owner. THIS IS VERY IMPORTANT. 11. TH-750 heaters are engineered and constructed to last for many years when the supply steam is of good quality, the feedwater has been softened and the condensate is removed correctly 12.
- Page 12 22. Examine the heat exchanger coil for scale buildup and signs of leakage. If no leakage is detected, carefully clean any excess scale from the coils and prepare the heat exchanger coil for installation. If leakage is detected between the coils and water in the tank, either repair the leaking coil(s) or replace the heat exchanger coil.
- Page 13 local codes, or accepted contractor practices as to the use and/or type of joint compound or sealer at the connections. 27. Reconnect the small line leading to the energy source pressure gauge. 28. If the unit is equipped with a circulating pump, the pump relay must be interlocked with the temperature control valve so that the energy source will shut off if the pump is not operational.
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Page 14: Cleaning Procedure
Cleaning Procedure: On an annual basis when using extremely hard water the inner bundle will need cleaning to remove lime and scale deposits. This is simply done by draining the unit and following these steps: 1. Close the outlet isolation valve to the domestic system and turn off recirculation pump. - Page 16 APPENDIX A Bolt Torque Procedure SEQUENCIAL ORDER ROTATIONAL ORDER 1 - 2 • 8-BOLTS SEQUENCIAL ORDER ROTATIONAL ORDER 1 - 2 7- 8 9 - 10 11 - 12 12-BOLTS TH-750-IMI-REV-5...
- Page 17 APPENDIX A Bolt Torque Procedure ROTATIONAL ORDER SEQUENCIAL ORDER 1 - 2 7- 8 9 - 10 11 - 12 13- 14 15- 16 16-BOLTS ROTATIONAL ORDER SEQUENCIAL ORDER 1 - 2 5 - 6 7 - 8 11 - 12 13- 14 15- 16 17- 18...
- Page 18 APPENDIX B TH-750 Steam Fired Single Unit Piping Hookup Notes: 1. Suggested piping design. Designer should consult local codes to verify compliance. Hookup shown with Float & Thermostatic steam trap piped to gravity atmospheric condensate return line. For pressurized condensate return systems or where a lift is required, the TH-750 must be fitted with a Thermaflo Engineering pump trap on pressure powered pump in place of the F &...
- Page 19 APPENDIX B TH-750 Steam Fired Single Unit Piping Hookup With Storage Tank For Peak Use Notes: 1. Suggested piping design. Designer should consult local codes to verify compliance. 2. Hookup shown with Float & Thermostatic steam trap piped to gravity atmospheric condensate return line.
- Page 20 APPENDIX B TH-750 Steam Fired Single Unit Piping Hookup With Blend Valve & Thermal Loop Diverter Notes: 1. Suggested piping design. Designer should consult local codes to verify compliance. 2. Hookup shown with Float & Thermostatic steam trap piped to gravity atmospheric condensate return line.