MCi Crusader II 1989 Maintenance Manual page 471

Date
1-1-89
Page
.---1_6-_1 - -
MC-9 MAINTENANCE MANUAL
HEATING AND AIR CONDITIONING
HEATING SYSTEM
The coach is provided with a hot water forced-air heating
system which uses the engine cooling medium for heating
the interior of the vehicle and windshield defrosting. Two
heating radiator cores are provided, one for the main inte-
rior heating system and one for the driver's heater and
defroster.
Heating in the stepwell area is provided by the introduc-
tion of heated air from the main right hand passenger heat-
ing duct into the stepwell. The heat enters the stepwell
through louvers at the rear of the stepwell.
A complete air conditioning system is installed as stand-
ard equipment. The same duct system is used for both air
conditioning and heating.
An optional auxiliary air conditioning evaporator and
blower unit is mounted at the extreme rear of the left hand side
parcel rack. This unit operates in conjunction with the main
coach air conditioning system and is controlled by its own
coach temperature sensing unit This auxiliary air conditioner
can be used with either Freon 12 or with Freon 500. The
'lurpose of this unit is to provide additional cooling at the rear
Jf
the passenger compartment
Flow of hot water to the main heater core is controlled by
an electric water valve. A manually-operated water valve
controls the flow to the driver's heater core. In the engine
compartment. manually-operated shut-off valves are pro-
vided to isolate the heating system in the event of system
failure or when the cooling system is to be drained.
A temperature sensing unit is located in the front L.H.
baggage compartment at the center control duct and
through relays, controls the main heater water valve within
limits selected by means of the heat control dial on the ·
driver's switch panel.
0
0
0
Driver's fresh air located to the left of the driver
under the duh.
0
Driver's heater or air conditioning Gasper located to
the right of the driver under the dash.
Fresh air intake above Tire Compartment