dublo 100

The Dublo 100 has a maximum working head of 30 meters, i.e. 100ft. It is suitable for use in single or multiple dwelling applications, and is designed with three main purposes in view:

- To be highly efficient
- To withstand high working heads
- To be very compact

In practical use these objectives have been successfully achieved and the space saving feature has proved especially valuable in the compact plumbing layouts which are now generally favoured, as well as being ideal for conversion and modernisation programmes while their narrow form and highly effective insulation permits them their use in shallow recesses.

Operation

The cold water enters through the disperser, and slowly fills the lower portions of both cylinders in proportion to the amount of hot water being drawn off, at high draw-off rates.

The metering orifices at the top and the bottom ensure that an equal amount is provided by each cylinder.

It will be noted that, owing to the small diameter of each unit, there is no likelihood of the incoming cold water mixing over a large area with the hot, thus reducing the temperature and this effectively ensures that almost all the stored hot water is available for use.

The Dublo tank operates on the "U" tube principle, i.e. the cold water being heavier than the hot, it will always balance the hot water in both halves of the unit, whether or not hot water is being drawn off.

The expansion pipe on the top draws equally from both halves for the unit whilst the breaching connection to the bottom of both halves alleviates any 'dead water'. Units are supported by an integral steel skirt.

Immersion heaters

If a vertical immersion heater is fitted, the recommended maximum length, when used in the top entry position, to obtain maximum quantity of heated water, should be 150mm less than the overall height of the unit (shown n diagrams at 'A').

This applies to all models whether Direct Pattern, Single, or Double Feed Indirect Pattern. The advantage of the vertical heater is that hot water is available quickly, but it requires access above the Dublo tank if it should need to be removed.

Where a horizontal Immersion heater is chosen a 230mm heater should be used.