Parker Hannifin Boiler WH600L

Turn off Heater, and main line electrical disconnect switch. Allow Heater to cool to room temperature.

Install a Drain Valve on the Lower Header or if not available, remove one of the Header Caps and drain the System completely. Be careful not to cause Water Damage to Controls or to the Floor if safe drainage is not available.

If the water is dirty, remove the Heat Exchanger from the Boiler. Remove the cap from the other lower Header.

Remove and clean the Expansion Tank.

Take a hose and thoroughly wash the external Heat Exchanger. Wash inside of the Upper Header and down through the Tubes until the System is thoroughly clean.

If it is not possible to clean the Tubes thoroughly or if there is considerable rust of scale deposits, consult the Manufacturer for the recommended cleaning procedure.

If it is not practical to remove the Heat Exchanger, connect the hose to one of the connections off of the Upper Header such as the Expansion Tank Opening, Relief Valve Opening or Pressure Gauge Opening. Allow the water to run through the System and drain until all the water is thoroughly clean.

If the Heat Exchanger is removed, the Gaskets should be replaced and all surfaces carefully cleaned so that the Gasket Surfaces will properly seal against leaks.

Before refilling the Boiler, the Low Water Cut-off Probe(s) and Temperature Control Bulbs should be inspected and cleaned or replaced as necessary. The Low Water Cut-off(s) should be tested for safe operation when re-filling the Boiler.

Heater tubes need replacement after internal and external inspection?

Replacement resulted from overheating?

Replacement resulted from a water condition?

Inlet and outlet circulating lines disconnected and removed

Heat exchanger disconnected and removed

Drain line disconnected and removed

Warning: This procedure requires trained personnel with PPE!

Heater turned off and cooled to room temperature

Drain Valve installed on the Lower Header or System drained completely

Heat Exchanger removed from the Boiler if water is dirty

Expansion Tank removed and cleaned

External Heat Exchanger thoroughly washed with a hose

Tubes thoroughly cleaned or Manufacturer consulted for recommended cleaning procedure

Heat Exchanger reinstalled with new Gaskets and all surfaces cleaned

Low Water Cut-off Probe(s) and Temperature Control Bulbs inspected and cleaned or replaced