Xylem Heat Exchanger 04036-HCF

Ensure the heat exchanger is operating within the design pressure and temperature on the nameplate.

Shut off the flow of hot medium first.

If circulation of cooling medium is stopped, ensure circulation of hot medium is also stopped by by-passing or other methods.

Verify that equipment is not operated under conditions in excess of those specified on the nameplate.

Drain all fluids to eliminate the possibility of freezing and corrosion.

Drain condensate from steam heaters and similar apparatus to guard against water hammer when shutting down.

Ensure there is no pulsation of fluids to prevent vibration, strain, and resulting leaks.

Ensure all pressure is off equipment and the unit is drained before opening heads

Inspect all tubes for erosion, corrosion, or foreign material and describe findings

Inspect all anodes for excessive corrosion or scale insulation

Scrape anodes to a bright surface if necessary

Inspect filters to prevent foreign matter from entering the exchanger

Avoid blowing out heat exchangers with air if operating fluids are flammable or hazardous

Select cleaning method for heat exchangers

Open the vent connections and start to circulate the cold medium only.

Ensure passages in the exchanger are entirely filled with the cold fluid before closing the vents.

Introduce the hot medium gradually until all passages are filled with liquid, then close vents.

Slowly bring the unit up to temperature.

Was the operation started gradually?

Was hot fluid admitted to the unit gradually?

Was the unit shocked with cold fluid when hot?

Observe interior and exterior condition for scale build-up

Is there any noticeable scale build-up on the tubes?

Check for complete stoppage of flow through tubes due to scale

Has there been a marked increase in pressure drop or reduction in performance?

Has the unit been checked for air or vapor binding?

Clean the heat exchanger if fouling or scaling is observed

Describe any observed sludge or scale coating on the tubes

Enter the interval in days since the last cleaning

Inspect for shipping damage and contamination

Is the heat exchanger placed in immediate service?

Take precautions to prevent rusting or contamination if not in immediate service

Describe preservation methods for interior surfaces during storage

Remove accumulations of dirt, water, ice or snow and wipe dry before indoor storage

Open drain plugs to remove accumulated moisture if not filled with preservative

Is the storage environment indoors, above grade, dry, and low humidity?

Record temperature in storage area