Thermolec AcuSteam - Manual (Page 5)

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3. Startup
3.1 The startup of the humidifi er is done as follows :
 Adjust the knob on the humidistat to the humidity level (percentage) desired.
 Confi rm that the water supply valve is open.
 Put the main power ON at the electrical panel. The green pilot light comes ON on the LED panel. The
humidifi er is ready to work.
Working Principle :
3.2 Unlike other types of humidifi ers which produce humidity by passing warm air through a moist pad, Acu-
Steam produces humidity from steam dispersed directly into the supply duct.
3.3 A humidistat (installed either on the wall or the air return duct) controls the unit. You set the knob of the
humidistat according to your desired level of humidity (35-45% recommended). Please read the next section
about the Acu-Steam humidity control.
3.4 When the humidistat senses a need for humidity, it starts the humidifi cation process.
3.5 The tank fi lls with water.
3.6 The electronic control starts the blower fan in the furnace to move the air as the humidifi er starts boiling
water and producing steam. If the fan cannot start (i.e. there is no air movement to transport the steam or
insuffi cient air pressure), the humidifi er stops itself. Please note that it may take a few minutes to bring the
water to a boil. The steam exits the water tank through the steam hose, moves through the steam diffuser
installed in the warm air duct and is released into the duct where it mixes with the moving air.
3.7 As water evaporates, the electric valve opens as needed to replenish the water in the tank.
3.8 When the humidity reaches the desired level, the humidifi er stops producing steam. In order to remove
scale and keep the tank as clean as possible, the humidifi er drains after a certain number of steam producing
cycles (see section 18.5 on page 24 of install manual for more details).If there is still a demand from the
humidistat after draining, the tank refi lls and starts to produce steam again. This process is part of the self-
cleaning feature.
3.9 When the humidistat is satisfi ed, the fan continues to run for a short period of time in order to eliminate
the steam from the ducts and the unit goes to ready mode, waiting for the next call from the humidistat.