practical water heating rev 3
Post on 14-Jun-2015
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Critical but simple maintenance guide for the concrete industry to help you get more life and
greater efficiency out of your product.
Joe DeFrankOwen Blevins
Bobby Giannetti
Variety of Heating and Cooling Equipment
Heating Equipment
•Bulk Storage Oil/Gas Unpressurized Hot Water Heaters
•Boilers (Pressurized Vessels)
•Instant Hot Water Heaters (Direct Contact)
Chilling Equipment
•Chillers
•Ice machines
•Liquid Nitrogen
Warning: Do not attempt any of the following operations without adult supervision…
Seriously, please follow ALL OSHA rules and regulations while performing any of the following inspections and adjustments.
•Above all, safety first!
•Use common sense.
•If you have the people and resources, use them.
•If you don’t, pay for those services…
Practical Water Heating & Chilling Tips
Always perform tank inspections 2-3 weeks prior to tank operation
Calcium and Sediment Build-Up
Check the inside of your tanks at the beginning of each heating season
Calcium build-up on the fire tube will reduce heat transfer
Temperature ControlTemperature-control thermo
wells should be checked
Build up on the temperature-control thermo well will effect the accuracy of controls and thermometers
Zinc Anode RodsFour installed in tank
Check monthly
Replace as needed
Before
After
Efficient Airflow and Safety Switches
Clear airflow provides proper combustion
Clear all debris from air intake and blower units on burner.
Inefficient air intake = inefficient heating
Test manual reset on high-limit temperature control
Inspect low-water burner safety control during annual tank drainage
Pump MaintenanceUnheated water discharge pump
should be drained after daytime operation
Insulated and heated pumps do not require daily draining
Clear Fuel Lines
Oil nozzles should be changed yearly
Oil filters and fuel supply screens should be cleaned or changed each heating season
Ignition Set Points
Change and adjust all ignition set points
Example: electrodes and high tension leads
Refractory
Combustion Chamber
Check refractory combustion chamber for damaged pieces
Stack Maintenance
Cover stack in summer months if using tank for chilled water
Condensation in fire tube will damage the combustion chambers
Tank & Insulation Inspection
Conduct exterior tank inspection
Confirm that aluminum and insulation covering is intact
Vent Maintenance Tank vent must be free of debris
Examples: bird nest or ice
Ice formed on vents will cause tank to collapse
Emergency manhole vent should not be tightened
Energy Savings
Stack heat recovery system will increase unit efficiency by 15%
Energy Savings
Blending Valves increase efficiency of hot or chilled water by giving operators exact temperature control.
CHILLERSChiller should be drained and filled with Glycol during winter monthsFans should be kept unobstructed
Clean coil using compressed air before start-up
During concrete plant operation, check evaporator coil for dust build-up
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