freightliner cascadia, Driver Manual, Page: 104 / 238

Failure to observe these precautions could cause
an explosion or fire, resulting in serious property
damage, and personal injury or death.
NOTICE
Always ensure that air inlet and outlet grilles are
not restricted. Restriction of any air inlet or outlet
ports could result in damage to the auxiliary
heater.
IMPORTANT: To maintain reliable performance,
run the accessory heater for at least 15 minutes
every month to prevent fuel from degrading.
Accessory heaters function when the ignition switch
is in the off position and the cab load disconnect
switch is on, if equipped.
IMPORTANT: Wait three minutes after shutting
down an accessory heater before turning the
cab load disconnect switch (CLDS) to OFF.
NOTE: The low voltage disconnect (LVD) control
prevents a heater from draining the batteries
below starting voltage.
Espar Heater
Refer to the Espar website, www.espar.com , for ad-
ditional information.
Espar Mini-Controller
To turn the heat on, press the heat button. See
Fig. 8.7 . The red indicator will illuminate when heat
mode is activated. Adjust the desired temperature
with the control knob; rotate the temperature control
knob clockwise for warmer air, or counterclockwise
for cooler air. To turn the heat off, press the off but-
ton.
To turn the fan on, press the fan button. The blue
indicator will illuminate when ventilation mode is acti-
vated. To turn the fan off, press the off button.
Espar Digi-Controller
Vehicles built after December 8, 2011 with the Digi-
Controller and D2 air heaters are equipped with an
internal LVD in the Digi-Controller that prevents the
heater from draining battery voltage below 12.0 volts.
To turn heat mode on, press the heat button and the
heater will begin its start-up cycle. See
Fig. 8.8 . ON
will display briefly followed by the ambient tempera-
ture, and the green indicator will illuminate. Ambient
display temperature range is 41°F to 90°F.
To adjust the desired temperature, press the up or
down arrow buttons. The desired temperature will
display briefly, followed by the ambient temperature.
The desired temperature will remain in the modulator
memory when the heater is not in operation. Tem-
perature adjustment range is from 41°F to 90°F.
To turn heat mode off, press the heat button again.
The heater will initiate a 3-minute cooling cycle.
To turn the fan on, press and hold the fan button until
the blue indicator illuminates and the display shows
active rotating digits. To turn the fan off, press the
fan button again.
NOTE: The Digi-Controller also has a program-
mable run timer that will automatically shut the
heater off after the set time limit. The default
time limit setting is 10 hours.
02/06/2012 f611161
1
2
3
4
5
6
1. Temperature Control Knob
2. Fan Button
3. Fan Indicator (blue)
4. Off Button
5. Heat Indicator (red)
6 Heat Button
Fig. 8.7, Espar Mini-Controller
Climate Control
8.6