Operation Manual

10 Product Overview
3.2 Functional description
The Condair RS steam humidier is an atmospheric steam generator. It operates on the resistance heating
principle and is designed for direct room air humidication (with blower pack) and indirect humidication
(with steam distributor) in venti lating and air-conditioning systems.
Water supply
The water is supplied via a lter valve (accessory "Z261") to the steam humidier. It reaches the steam
cylinder via the level controlled inlet valve and the open lling cup.
Note: the open lling cup is designed in such a way, that the supply water is separated from the unit
water. That means, that no unit water can ow back into the supply water line.
Level regulation
The water level in the steam cylinder is continuously monitored with the level unit. If the water level
reaches a preset level (due to the evaporation process) the level unit supplies a signal to the controller.
This opens the inlet valve and the steam cylinder is lled up. When the preset operating level is reached,
the level unit supplies another signal to the controller to close the inlet valve.
The pressure equalizing pipe between the steam connection and the level unit ensures that the water
levels are the same in the steam cylinder and the level unit.
Steam generation regulation
The steam is produced in the steam cylinder by several resistance heating elements. An external or the
integrated continuous controller control the steam production fully variably from 0 to 100 %.
Alternatively the Condair RS can be controlled also via an On/Off controller.
Flushing
The evaporation process increases the concentration of minerals in the water of the steam cylinder. A
suitable volume of water must be ushed out of the steam cylinder from time to time and replaced by
fresh water to ensure that this concentration does not exceed a specic value unsuitable for operation.
The Condair RS consists of the following two forms of ushing:
– Automaticushingtakes place as soon as the water in the steam cylinder exceeds the upper
operating level (e.g. by foaming of the water).
– Flushing dependent on time performs the ushing process at preselected time intervals.
Automatic or time-dependent ushing takes place depending on the water quality and the operating data.
If the lowest operating level is reached during the ushing process, the inlet valve remains open until
the water level in the steam cylinder has reached the normal working level again. If the lowest operating
level is not reached, the inlet valve is closed.
Scale collector tank
The minerals precipitated by the evaporation process sink down in the steam cylinder and accumulate
in the scale collector tank, thus extending the service intervals and reducing the maintenance work.
Units designed for operation with water from a RO system or with de-ionized water do not require a scale
collector tank as RO water and de-ionized water contains only small amounts of minerals.