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MODES OF OPERATION
7.
Electric Heat and Auxiliary Heat Option (ELEC=electric heat, AUX HEAT=reverse-cycle & auxiliary electric heat,
Off=Use of reverse-cycle heat)
For DX Applications
ELECTRIC HEAT Units not equipped with reverse-cycle heat may have an electric heater added. Set to "ELEC" for the
electric heat option or "OFF" to disable. Reversing-valve toggle (energizing of reversing-valve output) will not occur
prior to compressor start-up if the electric heat option is selected. For legacy PPIO boards, the valve output and
electric heat relay will both be energized when DX electric heat is called for. Since the valve-relay output only supports
a maximum of 15 amps at 115V AC or 10 amps at 230V AC of resistive load, when installing an optional electric heater
that exceeds this load, it is necessary to install an additional contactor that is rated to handle the full load of the electric
heater.
AUX HEAT= Reverse-cycle & Auxiliary electric heat (Only available for following firmwares or newer: SmartTouch A25
connected to U-Board R3V36, and SmartTouch A26 connected to U-board Two 01T07) The control board allows
operation of an optional auxiliary (aux) electric heater output. If an auxiliary electric heater is not installed, select "OFF"
to disable the auxiliary electric heater. Selecting "AUX HEAT" allows the auxiliary electric heater to be operated at the
same time as the reverse-cycle heating when the dehumidification feature is active and required. Auxiliary heat output
will also operate when using the optional Seawater Low Limit Adjustment or AutoChangeover feature, if enabled. See
DX Setting # 8.
For CW Applications
ELECTRIC HEAT (ELEC=use electric heat and/or hydronic heat, OFF=use only hydronic heat. Factory Default: ELEC)
The control board allows operation of an optional electric heater. The default for this feature is "ELEC" indicating
electric heat is enabled and installed. If an electric heater is not installed, select "OFF" to disable the electric heater.
The compressor and spade terminal outputs will be energized when CW electric heat is called for. Selecting "ELEC"
allows the electric heater to be operated at the same time as the hydronic valve when the dehumidification feature is
active and required.
Please consult with Dometic Customer Service or with an authorized service technician for assistance.
8.
Fan Motor Type The Split Capacitor default setting is correct for air conditioning units with high-velocity blowers. Only
change the setting to Shaded Pole if your unit has a Shaded Pole fan motor, recognizable by a blower-motor overhang.
(The Split Capacitor motor of a high-velocity unit is inside the blower, and the unit has "VTD" or "HV" in the model number.)
9.
Filter Hours Setting Reminder for air filter cleaning or replacement is determined by the number of hours of fan operation.
Filter Hours Setting can be set as a reminder to clean or replace the unit's air filter. Select the number of operating hours
until the filter reminder appears. Parameter choices are between 100 hours and 2500 hours. Dometic recommends that you
check the air filter at least every 500 hours of operation. The default setting is off. Once set, the timer keeps track of the total
amount of run hours that the fan accumulates. Once the timer setting is reached, flashes briefly on the status icon until it is
cleared. Display of the room temperature continues and the normal operation of the system is not affected. The reminder
can only be cleared and the timer reset via General Setting, and then Filter Hours Setting.
10. Filter Hours Reset The Filter Hour Reset setting shows the number of filter
reminder hours accumulated and allows clearing via a CLR icon. This
parameter displays the current elapsed time in hours since the timer was
started or reset. To clear the reminder, press the CLR icon. This resets the
value to 0 and restarts the timer.
11. CAN Bus Unit ID This parameter selection icon is grayed out whenever the
Smart Touch is not plugged into a control board with the CAN bus
daughterboard option. In other words, this parameter displays only when
CAN-bus network capability is available and the Smart Touch is plugged into
a networked control board. This parameter does not display when the Smart
Touch is plugged into a standard control board. Each control on the same CAN-bus network must be assigned a
unique Unit ID (0 -255). For example, the control that is set to 5 will respond to commands with a destination address
of 5.
12
Smart Touch Cabin Control Installation & Operations Manual
Figure 12: Smart Touch
General Settings Page 3 of 8
L-3380 ENGLISH
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