Climate Control - SMART Fortwo 451 Series Introduction Into Service Manual

Climate control

Heating
A high-voltage PTC heater with 4 kW output is
used instead of a heater heat exchanger through
which coolant flows as is the case on vehicles with
a combustion engine.
The heater is controlled using the heater/AC
operating unit via CAN based on the selected
interior target temperature and ambient temper-
ature.
The high-voltage PTC heater is supplied with
power by the high-voltage adapter plate fuse box.
1 Condenser
2 Expansion valve
3 Evaporator
78 Introduction of smart fortwo electric drive (3rd Generation) • Model Series 451
Air conditioning
As on a smart with conventional drive system, it is
controlled via the heater/AC operating unit.
The design of the system differs in the following
aspects:
• Electrically driven refrigerant compressor
• Thermostatic expansion valve on interior
evaporator with electromagnetic shutoff
function (only with code (V03) Battery cooling
system)
• Additional branch to chiller in refrigerant
circuit (only with code (V03) Battery cooling
system)
A9/6 Electric refrigerant compressor
N23 Heater/AC operating unit
N33/5 High-voltage PTC heater
P83.30-4835-00