Lotus TURBO ESPRIT Service Manual page 579

Page
4 SECTION PB
The electronic comparator
i s
fifted to the rear of the temperature confrol.switch;
PB2
-
AIRFLOW DlSTRlBUTl
ON
The heater/air conditioning unit i s located beneath the fascia and c0ntains.a heater
matrix fed with engine coolant via a cable/thermatat operated water valve and
a refrigerant evaporator.
Two fan motors are contained behind a cover i n the front luggage compartment on the
bulkhead. Fresh air is drawn into
this
cover from a chamber at the base of the
windscreen via a fresh air flap, and
i s
then blown into the heater/air conditioning
unit for heating/refrigeration and distribution to the various outlet vents. The
heater/air conditioning unit itself contains two flaps, a mode flap, controlling
airflow through the heater matrix, and a screen flap controlling airflow to the
windscreen vents. The fresh air flap and mode flap are opemted by vacuum
actuators supplied with vacuum on Domestic and
ROW
cars by the inlet manifold
via a non-return valve and reservoir mounted on the left hand fuel tank board,
whilst Federal Esprit Turbo's are supplied with vacuum from an engine driven pump.
The vacuum supply i s controlled by two valves mounted on a control plate and
operated by a cam connected by cable to the distribution control knob. The screen
flap i s mechanically opemted via the distribution control cable, and
a
bellcrank
lever and link.
Front Bonnet Fresh air Windscreen
intake
' 1
Footwell Vents
To Screen Vents
Hole (deleted mid
'86)
Can Only)