Thermolec Acu-Steam User And Maintenance Manual page 5

3. Startup
3.1 The startup of the humidifi er is done in as follows :
• Put the main power ON at the electrical panel. The green pilot light comes ON. The humidifi er is
ready to work.
• Open the water supply valve.
• Adjust the knob on the humidistat.
Working Principle :
3.2 Unlike other types of humidifi ers which produce humidity by passing warm air on a water curtain, a
rotating pad or another type of media, this humidifi er 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 need or comfort. Please read the next section about the 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 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 to 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 and automatically
drains. In order to eliminate the residues and keep the tank as clean as possible, the humidifi er also drains
after a certain number of boiling / refi ll cycles. 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.
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