TMC MCI mc-9 - Heating and Air Conditioning

Heating &
Air Conditioning
The cooch is equipped with o heoting ond oir conditioning system.
A three-position switch
located on the driver 's switch ponel is used to
select ei ther heoting or oir conditioning system operotion depending on
outsi de lemperoture . Moving the switch to the "A/ C" position wi ll ploce
the oir conditioning system in operotion . Moving the switch to the
" HEAT " position will operote the cooch heot ing system. In the "OFF"
position,
neither heot nor oir conditioning is operotive . The " MASTER "
switch must
be " ON " ond engine running before eithe, system will
functi
on.
The " HEAT CONTROL" knob located on the driver 's switch ponel to
the left of
the driver is used to select interior temperoture within the
ronge of 72-82° F ( 22-28° C ). Once o temperature is selected the system
wi
ll oulomoticolly mointo in this temperoture within close limits.
An A/ C Hi / lo tell-tole light to indicote on oir cond i tioning sys tem
molfunct i on is locoted in the i nstrument ponel tell-tole li ght cluster . If th is
s igna l light floshes or stoys on , turn the oir conditioning system "OFF"
ond do not use until the couse of trouble l,vs been locoted ond
corrected by service personnel. A clutch sensor switch, locoted ot the
compressor , hos been included to worn on operator if the compresso r
cl utch engages while the A/ C system is "OFF ". If this cond ition sh ould
occur, the si gnal light will come on when the A/ C system is '' OFF"
in
dicating either o clutch molfunction or loss of compressor oil. The
eng i ne mu st be slopped immediotely ond the compressor drive belts
removed . The trouble should be locoted ond corrected by s ervice
personnel.
18
The flow of hot woter from the engine cooling system to the heating
ond o ir conditioning system con be stopped in on emerge ncy by the use
of gote va lves loc oted in the engine c omportment. See "ENGINE
COOLING
SYSTEM ."
When it is necessory to operate oir cond itionir~g sy s tem with cooch
stotionory , operote eng i ne ot lo st idle by engogir,g the " FAS T IDLE "
switch
on the dr iver's switch pane l.
The oux ili ory possenger A/ C unit con be operoted whe n ever moin
A/ C
is on . A switch ot rear end of switch panel provides ON / OFF contro l.
FIG_ 16
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