A.O. Smith HW 610 Cleaning And Flushing Instructions, Pre-Troubleshooting, Internal Contaminants

CLEANING AND FLUSHING INSTRUCTIONS

INTERNAL CONTAMINANTS

The hydronic system must be internally cleaned and flushed after a new or replacement boiler has been installed to remove contaminants that may have accumulated during installation. This is doubly important when a replacement boiler is installed into an existing system where Stop Leak or other boiler additives have been used.

Failure to clean and flush the system can produce acid concentrations that become corrosive, cause gases to form that block water circulation or lead to formation of deposits on the boiler surfaces, any of which could result in damage to the system and circulator.

All hot water heating systems should be completely flushed with a grease removing solution to assure trouble-tree operation.

Pipe joint compounds, soldering paste, grease on tubing and pipe all tend to contaminate a system.

Failure to flush contaminates from a system can cause solids to form on the inside of boiler exchangers, create excessive amounts of air and other gases to block circulation, foul various system accessories and even deteriorate circulation seals and impellers.

It is recommended that after installation, the boiler and system when filled should include the proper percentage of cleaning solution related to approximate water volume of the system. Fire and circulate for about one hour and then flush clean with fresh water. Commercial grease removing solutions are available from your distributor.

HOT WATER SUPPLY BOILERS PREVENTIVE MAINTENANCE

For care of the HW water system please refer to the A. O. Smith Users Information Manual supplied with the Boiler.

PRE-TROUBLESHOOTING

Before any extensive troubleshooting, perform the following:

Ensure that:

–Voltage (120 vac) is supplied to the appliance.

–System control (tank temperature control, thermostat, etc.) is calling for appliance operation (call for heat).

–Other contacts (switches) are closed (relay, low water cutoff, flow switch, coil protector, pressure switch, etc.).

–Gas supply pressure is within the maximum and minimum operating ranges listed on the appliance rating plate/label.

–Voltage (24 vac) is supplied by transformer.

–Appliance is wired according to wiring diagram.

Note: Cross wiring the 24 volt circuit of the relay will short the transformer.

–All wire terminals/connectors are firmly attached to valves, modules, switches, limit controls, etc.

–For LP models only check for possible lockout condition of the the ignition module.

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