19
EN
Control Parameters
14
General Settings Screen 5
13 Voltmeter Calibration .
Displays a live reading of
the voltage as read by the power and logic circuit
board. To calibrate the line voltage reading, press
the up or down icons. Calibrating this parameter
provides a more accurate voltage level when
calculating low voltage. Use a reliable voltmeter as a
reference when adjusting this parameter.
14 Set Point Temperature Differential .
Sets the
temperature differential in Fahrenheit for all modes
of operation: automatic, cool, or heat. By default,
this parameter setting is 2 °F (1 °C). It can be set to
either 1 °F (1 °C) or 2 °F (1 °C). In most cases, the
factory default is adequate to maintain a comfortable
temperature variation around the desired set point.
To maintain the room temperature closer to the
desired set point with less temperature variation,
set the parameter to 1 °F (1 °C). Frequent, shorter-
duration cooling or heating cycles may occur. See
section “Understanding the Operating Modes” on
page 15 for how this setting affects the modes.
15 Humidity Mode Min Temp .
Sets the
minimum room temperature (Fahrenheit) for the
dehumidification mode to run a cooling cycle to
remove air moisture. If the room temperature falls
below the setting, the dehumidification mode will
run a heating cycle. The default setting is 50 °F
(10 °C), and it can be adjusted between 40–75 °F
(4–24 °C). See “Dehumidification” on page 15 for
the dehumidification mode functions.
15
General Settings Screen 6
16 Auto Fan Speed Temp Differential .
Sets the
incremental differential (with cumulative steps)
between the ambient and set point temperatures at
which the fan speed will increment to the next speed.
I
Note there is 1 °F hysteresis in the auto fan speed
differential to prevent the speed from changing
if the room temperature changes by a fractional
degree causing speed fluctuations. Both the
reversed fan speeds in heat setting, and the set
point temperature differential setting, have an effect
on the operation of the auto fan speed.
17 Supply Air Temp Limit .
Sets the maximum supply
air discharge temperature allowed, and shuts down
the heat mode if the temperature sensor exceeds the
programmed set point. If this condition is met, there
is no fault indicator or lockout. Before enabling:
a. Set the general setting aux heat option to On.
b. Place the OAT sensor in the supply air stream
immediately downstream of the blower
discharge.
The heat mode will be restored once a 10 °F
hysteresis has been satisfied. The heat mode
will also be restored if the power is cycled to the
control and the OAT sensor temperature is less than
the setting but still within the hysteresis. To display
the discharge temperature, press the temperature
icon until the temperature title shows outside (same
as viewing the outside air temperature).
Summary of Contents for MCS-CTRL
Page 42: ...42 EN Smart Touch Cabin Control...
