Heater/Fan 3 Hysteresis - Varifan ECS-4+ User Manual

ECS-4+

HEATER/FAN 3 HYSTERESIS

In order to minimize erratic behavior of
Heater/Fan 3 when room temperature is
exactly at the relative set point, the hsteresis
setting separates this ON/OFF threshhold
into two: one ON threshhold and one OFF.
This feature greatly reduces equipment wear.
Hyst.
The temperature difference between the two
thresholds is the hysteresis.
The hysteresis is adjusted in 0.5 degree
increments from a minimum setting of 1°F
(0.5°C) to a maximum setting of 6°F (3°C)
degrees.
Adjusting the hysteresis setting:
•
rotate the Selector dial to position (12);
•
rapidly rotate the Adjustor dial back and
forth to enter secondary function mode;
•
rotate the Selector dial to position (6);
rotate the Adjustor dial counterclockwise to
decrease the hysteresis setting, clockwise to
increase it.
The hysteresis setting is displayed on the
front panel.
Example:
The Heater/Fan 3 relative temperature set by primary
function (6) is adjusted to 75°F, and the hysteresis is
set to 2°F. When stage 3 is configured for a third fan,
the room temperature must reach 73°F before the fan
shuts off, and rises to 75°F before the fan begins to
operate.
Page 38
www.monitrol.com