Monaco DYNASTY 2006, User Manual

Page: 301 / 384

DYNASTY 2006 ELECTRICAL SYSTEMS - CHASSIS — SECTION 9 • 301
A/C Operation:
The A/C dash system will operate in all modes except
BI LEVEL
,
FLOOR
and
OFF
. When the Mode
Control knob is positioned in the
A/C
mode, fresh air is drawn through the front air intake of the unit through the
A/C coil. The Mode Control knob, when placed in the MAX A/C position, closes off a damper door to outside air
and recirculates air from inside the motorhome. Select this position when maximum cold air is desired or to keep
outside air from entering the motorhome.
Heat and Defrost Operation:
• Set the Mode Control Switch to the desired position.
• Set the Temperature Control Switch to the red zone.
Operating Tips & Hints
Air intake and discharge temperatures are greatly affected by ambient temperatures and relative humidity. A
large amount of cooling capacity is used to dehumidify air as well as cool it. After three to fi ve minutes of A/C
operations the discharged air temperature should be approximately 30º F cooler than the fresh or recirculated air
entering the A/C system.
Winter Use:
• De-ice the windshield using the
DEFROST
mode.
• Air will heat up faster with a slower blower speed until normal operating temperature ranges are reached.
Summer Use:
• Close all windows and vents to hot, humid outside air.
• The recirculation blower will provide quick cool down.
• Use a lower blower speed to produce cooler air.
Heater:
The heater warms the air in the dash area. Much like the refrigeration side of the system, a liquid will be used in
the process. This liquid is the engine coolant. The coolant is passed from the radiator to an electronic water valve.
The water valve, when open, will allow the coolant to fl ow through the heater core. The heater core is tubing and
fi ns. Air is drawn into the system by a blower motor through the outside recirculation door opening. Air is blown
through the A/C evaporator core and then through the heater core. When the temperature control is in the
WARM
position coolant fl ows through the heater core. When the temperature is in the
COOL
position coolant fl ow
bypasses the heater core. In either position, the airfl ow is felt at the discharge vents.
Electric Water Valve:
The water valve, which controls the water fl ow to the heater core, is opened and closed by a stepper motor
mounted on the water valve. A control module compares the output voltage from the thermostat to the feedback
for the stepper motor of the water valve. The control module then drives the motor to within one-half volt of the
control thermostat voltage.
Functional Test:
• Start and operate the engine until the water reaches normal operating temperature.
• Set the HVAC temperature control to the full hot position.
• The discharge air outlets should have hot air.
• Rotate the temperature control to full cold position.
• Allow 10 minutes for the temperature to stabilize.
• The discharge air outlets should have cold air.