Overview

Vapac replacement PCC2N-2WA Cleanable Steam Cylinder for single phase units. Cleanable versions of the Vapac Humidifier Steam Cylinders can be opened to allow removal of loose scale deposit. The cylinder designs are the same but instead of a welded joint the two parts are brought together by a seal and two clamping rings with quick-release fasteners.

Cylinder - Steam Generation

As water flows between different electrodes generating heat the water level begins to rise in the steam cylinder. The more the water level rises more surface area of the electrodes will be covered in water which will result in a hgiher current draw. Once the water in the cylinder reaches its boiling point steam will then be produced and distributed through the system. On first start up of the unit water conductivity is low so allow 30 to 60 minutes for the water to heat up to boiling and produce steam.

When the desired steam output reaches the users set level, the fill valve will close. As water evaporates over time, the water in the steam cylinder will fall. If the cylinder's water level drops below the user set level, the valve will open to maintain the water level and requested steam output. If steam is overproduced, the steam valve will stay closed until the requested level is reached through evaporation of the water in the cylinder. When steam has been overproduced the steam valve will close till the water in the cylinder evaporates thus triggering the valve to open and produce steam to the users determined level.

Cylinder Maintenance

The water hardness and the humidity demand at the site will determine the steam cylinder cleaning schedule. Units located in areas with naturally soft waters will experience a longer time frame between cylinder cleanings, possibly upwards of 12 months in calendar terms. With hard waters, a more frequent cylinder cleaning must be expected at 2 or 3 times a year. When servicing a cleanable cylinder take it to a service area where it is convenient to open it and dispose of the contents. When cleaning out loose material also remove any build-up on the end of the short "cylinder full" electrode. Make sure the slotted strainer is clean, intact and in place. When re-assembling use a new seal and make sure mating surfaces are free of scale particles as they will prevent a perfect seal and cause leaks.

NOTE 1: Do not touch an operating cylinder of this type in case of a leak allowing water at mains voltage to seep out.

NOTE 2: Do not touch an operating cylinder of this type in case of a leak allowing water at mains voltage to seep out.

  • With the power connected to the unit, manually drain the unit, by depressing (and holding) the Run/Off/Drain Switch to the lower momentary drain position.
  • Disconnect the Vapac Unit from the incoming electrical supply by means of the external isolator (disconnect switch). This should be “locked off” to prevent accidental operation.
  • Unlock the unit's access panel (dependent on model), and swing open to gain access to the steam cylinder.
  • Carefully ease off the electrode caps. If the cylinder is to be replaced, care should be taken not to twist the electrode caps while removing the black power caps. As the electrodes can rotate in the cylinder bosses (if the plastic cylinder is hot) and lead to unbalanced electrical loads.
  • Loosen the hose clip and disconnect the steam hose from the top of the cylinder.
  • Using a twisting movement, lift the cylinder clear of its seating in the feed/drain manifold and carefully remove the used cylinder from the unit.
  • Inspect the feed/drain manifold to ensure this is clear of sediment.
  • The drain pump can be removed for inspection and cleaning, by following the instructions below.
  • With the pump back in position, insert the cylinder into the feed/drain manifold, pushing it down firmly to ensure it is seated correctly and reconnect the steam hose.
  • Replace the electrode caps – ensure that they are replaced in the same sequence as when removed. With the cylinder full pin towards the front of the unit, electrode number 1 will be to the left of the white cylinder full electrode. Electrodes 2, 3, 4 etc will be sequentially connected clockwise around the cylinder. The connections to the cylinder should be routed as close as possible to their original route.

Specifications

More Information
Manufacturer Vapac

Compatibility

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