Emerson 1F97-391 Humidifier Control Monitoring, Programmable Automatic Humidity Reduction

Humidifier Control

and Monitoring

When humidity key is pressed in the run mode the actual humidity will be displayed on the left side of the display. HUMD is displayed above the actual humidity. The humidity set point is displayed on the right side of the display.

or key may be pressed to modify the humidity set point. Maximum displayed humidity is 80% RH and minimum displayed humidity is 10% RH. If the heating system is operating and there is a demand for humidity, then the humidifier will

with respect to the humidifier’s capability.

Programmable Automatic Humidity Reduction.

This feature automatically lowers humidity when the outside temperature drops. This is to prevent the interior windows/walls from reaching the dew point where water condenses on surfaces. To achieve automatic humidity reduction, the thermostat lowers the humidity when furnace cycles are long. When the furnace runs shorter cycles, it increases humidity. For suggested settings see table below.

If your window insulation is poor, you need high humidity reduction. If your window insulation is good, you need low humidity reduction (factory setting).

To adjust this feature, refer to the CONFIGURATION section (page 19, step 15). Selection of 0 will cancel this feature.

operate.

If the demand for humidity is not satisfied for ten consecutive heat cycle operations, the display will show the word HUMD for one second and the word MX for one second signaling maximum possible humidity is reached

HI	Poorly insulated homes or homes with a lot of condensation on
	windows/walls

0Factory default – no humidity reduction

LO Well insulated homes requiring little humidity reduction

37

Features