Hvac Control Unit; Hvac Control Unit - PREVOST H3-41 Manual

CONTROLS & INSTRUMENTS

HVAC Control Unit

The cabin is pressurized by the A/C - heating
system. Air flow and controls divide the coach
into two areas:
• driver area with defroster;
• passenger area.
Pressurization of the cabin helps prevent dust
and moisture from entering.
Fresh air is fed in each area and has a separate
return air and discharge
passenger's area also has a fan in the lavatory
to circulate fresh air and for heating and cooling.
The lavatory fan serves as the main air exhaust
for the coach.
Warning :
Do not let temperature in the driver's
area rise above 72 °F (22 °C).
temperatures may cause drowsiness and affect
alertness while driving.
between 68 °F to 72 °F (20 °C to 22 °C).
Note :
To operate the air conditioning system
when the coach is stationary, run engine at fast
idle. When the A/C system is running, keep
windows and door closed.
To prevent battery run-down, the A/C and
heating systems will not operate if the charging
system is not working properly.
When the A/C system is running, park the coach
at least 4 feet (1,5 m) from other vehicles or
buildings to allow sufficient air flow through the
condenser core.
O
O
Separate driver and
ventilation and air conditioning controls are
located on this panel.
To operate, the coach's engine must be running.
The driver's or the passenger's units may be
turned on by pressing
buttons.
All parameters set before turn off will be kept in
memory for the next power on.
air duct. The
Warm
Keep temperature
passenger heating,
or or
3-18
The HVAC module performs a self diagnostic
every time it is turned on. Codes are shown on
displays or flashed on control buttons.
Heating Mode Indicator
Illuminates when system is heating.
Cooling Mode Indicator
Illuminates when system is cooling.
Fan Speed
The driver's fan has six speeds.
Increase speed by pressing on
the upper portion of the button,
decrease by pressing on the
lower portion.
Temperature Set Button
The driver's
passenger's
independent temperature
controls. To increase the temperature, press on
the " + " sign, to decrease the temperature, press
on the " - " sign. Temperature range is between
55°F and 85°F (12°C to 28°C).
Recirculate Button
Permits air recirculation in the
driver's or passenger's side of
the cabin.
A LED lights up when in operation.
Windshield defogger
Air is sent towards windshield
when activated.
All Vents Open
Air is sent to defogger vents as
well as
registers.
side and the
side have
panel and footwell