Nortec GS Series - Manual (Page 27)

GS Series Installation | 24
Control Installation
Mount any wall humidistat (control or high limit) over standard electrical box at height similar to typical
thermostat. Any wall humidistat should be in location representative of overall space being humidified and
not in path of blower pack or air supply grill. Do not mount on an outside wall where temperature
fluctuations can affect control response.
Mount duct humidistat in location representative of overall air humidity, usually in return duct. Do not mount
it directly in front of steam distributor or in turbulent or mixing zone. Mount humidistat where air's humidity
and temperature are uniform and representative of spaces being humidified.
Mount duct high limit humidistat downstream of steam distributors far enough that, under normal humidity
and air flow conditions, steam will have been fully absorbed (typically at least 10 feet). It must be located to
sense high humidity only when uniform and representative air is over-humidified or approaching saturation.
Mount duct air-proving switch so that it is able to sense air flow or lack of it. Wire it to make when air flow is
sensed and break when air flow fails.
Check operation of all on/off controls before starting humidifier.
Calibration of controls (on/off or modulation) in the field may be necessary due to shipping and handling.
Verify humidistat accuracy before commissioning system.