Greenheck Fan 470656 manual Maintenance - Fall, High Limit, Gas Line, Gas Train, Vent Piping

Maintenance - Fall

High Limit

The high limit switch may have tripped over the summer; it should be checked and reset if necessary.

caution

Lock-out the gas and the electrical power to the unit before performing any maintenance or service operations to this unit.

Gas Line

Remove the drip leg and clean any liquid or debris that may have accumulated. Once the drip leg is cleaned, reattach it.

Gas Train

The gas connections, joints and valves should be checked annually for tightness. Apply a soap and water solution to all piping; watch for bubbling which indicates a leak. Other leak testing methods can be used.

Vent Piping

Remove any debris from the drip legs on the combustion air and exhaust pipes.

Burners and Orifices

Before each heating season, examine the burners and gas orifices to make sure they are clear of any debris such as spider webs, etc. Clean burner as follows:

•Turn off both electrical and gas supplies to the unit.

•Disconnect union between manifold and gas valve.

•Remove manifold and burner assembly.

•Inspect and clean orifices and burners as necessary. Avoid using any hard or sharp instruments which could cause damage to the orifices or burners.

-Remove any soot deposits from the burner with a wire brush.

-Clean the ports with an aerosol degreaser or compressed air.

-Wipe the inside of the burner clean. Cleaning the burner with a degreaser will slow the future build-up of dirt.

•Before reinstalling the burner assembly, look down the heat exchanger tubes to make sure they are clear of any debris.

•Reinstall manifold and burner assembly, reconnect wire leads and gas supply piping.

•Turn on the electrical power and gas supply.

•Follow the start-up procedure to light the burners and verify proper operation.

Heat Exchanger

The heat exchanger should be checked annually for cracks. If a crack is detected, the heat exchanger should be replaced before the unit is put back into operation. Also, airflow across the heat exchanger should be checked to make sure the blower is operating properly.

Flue Collector Box

The flue passageway and flue collector box should be inspected prior to each heating season and cleared of any debris.

Electrical Wiring

The electrical wiring should be checked annually for loose connections or deterioration.

Replacement Parts

When ordering replacement parts, include the complete unit model number and serial number listed on the unit nameplate.

Evaporative Coolers

The water should be shut off and all the lines drained when the outside temperature drops below 45ºF.

Remove drain plugs for the winter.

Clean all interior parts of any mineral deposits or foreign materials that may have built-up during the cooling season.

Replace any worn or non-functioning parts.

Winterizing Chilled Water Coils

During the winter, chilled water coils need to be protected against freezing. Manufacturer recommends protecting the coils by either blowing-out the coils or by flushing the coils.

Blowing-Out Coils

1.Close valves on the supply and return lines.

2.Open drain valves and/or drain plug. Remove vent plug to allow coil to drain faster.

3.After coil is fully drained, connect a blower to the caps. Do not connect the blower to the air vent or drain plug.

4.Close the vent plug on the header that the blower is connected to. Open the drain valve or cap on the other header.

5.Turn on blower for 30 minutes. Place mirror at discharge. If the mirror fogs up, repeat procedure until no fog appears on the mirror.

6.After drying the coil, wait a few minutes then repeat Step #5.

7.Leave drains open and do not install plugs until beginning of cooling season.

60 Model IG / IGX Make-Up Air

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