1975 Datsun 280z FSM - Spooled up Racing

Air Conditioning
BI-LEVEL position
Magnet valve - F.I.C.D.
AIR Iff »ff VHT KIT BI-CtVEL ll-tepfcll WW-mKe im iiS
D "
COLD
lUMP " n,B
HOT r. H ,, ETER 0FF 12 3 4
- ^ FAN » • * • *
\\P C
AIR lever: In BI-LEVEL position
FAN lever: In any position other than OFF
TEMP lever: Cold to Hot
Vacuum selector valve
Fast idle actuator
1?
Magnet valve
- Vacuum source
4> ^ ±S
AC544
Fig. AC-9 Air flow - BI-LEVEL position
1. Air intake door ... Vacuum is
imposed on the actuator of the air
intake door and the door is in the
open position.
2. Mode door . .. Vacuum is introduced
only to D x of the double-action
actuator and the door is allowed to
open in its first-stage position. Outside
air admitted from the air intake door
thus flows both into the heater core
and the evaporator.
3. Heater door .. . The heater door
is in the open position. Warm air
heated by the core is directed toward
occupant's feet in the passenger compartment.
4. Vacuum cock . .. Vacuum is imposed
on the actuator, causing the
cock to open. Hot water now circulates
in the heater core.
AC-9
5. Fast idle actuator... The actuator
is not in operation.
Under the BI-LEVEL position,
fresh outside air is discharged from the
instrument air outlets while, from the
heater outlets on the floor, warm air is
produced.