Xylem Heat Exchanger 08036-BCF

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?

Has there been a reduction in performance?

Has the unit been checked for air or vapor binding?

Clean the tubes if fouling or scaling is observed

Describe any observed damage to the heat exchanger due to scale build-up

Ensure all safety measures are in place before shutdown

Shut off flow of hot medium first

Is it necessary to stop circulation of cooling medium?

Stop circulation of hot medium if cooling medium circulation is stopped

Drain all fluids to prevent freezing and corrosion

Drain condensate from steam heaters to prevent water hammer

Ensure no pulsation of fluids to prevent vibration and strain

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

Are the passages in the exchanger 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 and not suddenly when empty or cold?

Was the unit shocked with cold fluid when hot?

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

Was the unit filled with oil or other preservative?

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

Store under cover in a heated area, if possible

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

Inspect all tubes for erosion, corrosion, or foreign material.

Inspect all anodes for excessive corrosion or scale insulation and scrape to a bright surface.

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

Use a torque wrench when replacing heads and tighten bolts to specified torque values.