Mars Comfort-Aire Century MCB18 SA Series Installation And Owner's Manual page 21

Wired Controller IOM - VCDxxSA
9. Operation
To set t he operat ion mode
Operation mode setting
When the mode is selected as emergency heating
(single-on electric auxiliary heating) mode,
in the mode area, the fan speed displays automatic
wind, and the fan speed key does not respond.
There is no sleep, 8-degree heating, turbo functions in
emergency heating mode.
When the mode is selected as heating + electric auxiliary
heating mode,
is no turbo function.
Press the Mode button to set the operation
mode. (Heat function is invalid for cool only
type unit)
For AHU models:
is displayed in the mode area, and there
+
is displayed
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