Hot Water Generator Installation and Operation Manual
6Maintenance
Power connections - rewiring
If any of the power connections must be rewired at the circulating pump or electrically activated controls, follow the steps listed below.
The combination of electricity and water WARNING can pose a very dangerous situation. Turn
off / disconnect all electric power before attempting any maintenance procedure.
1. Follow Steps 1 through 4 of the shutdown procedure (page 10) to take the unit
3.Carefully break the connections between the tube bundle head and the energy source inlet and outlet lines.
It may be necessary to break the lines at a WARNING second location, and for the lines to be
rotated to allow clearance for the tube bundle to be removed from the tank. If it is necessary, care should be taken to ensure that
4. Break the bolts loose that secure the tube bundle head to the tank. After all bolts have been broken loose, remove them from the unit.
2. After assuring the power has been turned off, disconnect and rewire the electrical connections in question.
3. Turn the power on and check that the component that has been rewired is functioning properly.
4. Slowly open the shutoff valves on the condensate (or boiler water return) line, cold water inlet line, and hot water outlet line.
WARNING
WARNING
The tube bundle head is heavy and can cause serious injury if it falls on your foot, leg, etc., use caution.
The tube bundle weight depends on the size installed. A hoist or some type of lift system should be made available to assist in removal or installation of the tube bundle.
5. Slowly open the shutoff valves on the energy source inlet line.
Tube bundle - inspection and replacement
The tube bundle is the heart of the Lochinvar Hot Water Generator. It should be removed and inspected every two (2) years.
5.Remove the tube bundle from the tank, use care not to damage the soft copper tubes.
6.Inspect for damage or excessive scale, etc.
7.Remove old gaskets and clean gasket sealing surfaces.
8.Reinstall the tube bundle.
Inlet, outlet, and condensate / water return line and manual shutoff valves -
WARNING
WARNING
Steam or boiler water present situations that can be very dangerous because of the high temperature and pressures. To avoid possible injury or death, use common sense and follow all accepted and
recommended procedures when performing installation, operation, and maintenance procedures.
The combination of electricity and water can pose a very dangerous situation. Turn off / disconnect all electric power before attempting any maintenance procedure.
replacement
If any of the inlet, outlet, return lines, or shutoff valves are damaged and must be replaced, follow the steps outlined below.
The combination of electricity and water WARNING can pose a very dangerous situation. Turn
off / disconnect all electric power before attempting any maintenance procedure.
1. Follow Steps 1 through 5 of the shutdown procedure (page 10) to take the unit
1.Follow Steps 1 through 5 of the shutdown procedure (page 10) to take the unit
2.Assure that the energy source, condensate / water return line, cold water inlet, and hot water inlet have been shut off; that the tank has been completely drained; that the pressure has been bled from both the water and energy source systems; and that the water, all components, and surfaces have cooled.
WARNING
While it might seem feasible to replace inlet, outlet, condensate / water return lines, and shutoff valves without shutting down the entire unit, it is not advised. Unless the unit is completely shutdown, and the water and the energy source are isolated from the system, failure of a manual shutoff valve during the replacement process could result in serious injury.
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