414
REVO-E Heat pump 4 Function and functional schematics
4.4.8 Reheat Mode
Requirements:
– Clamp 15 active (ignition)
– Vehicle hybrid system active
– The HVAC's power needs are enabled by the signal
"D_AuxiliaryPowerEnabled"
– “D_CabinReheatReq” signal is requested by the BEA
body
– Environmental temperature >5°C
Reheat Mode is requested by the BEA body (air drying in
passenger compartment).
The SC620 activates the compressor and the axial fans
for maximum cooling.
The BEA body system activates the valves of the roof-top
heater simultaneously. Hot coolant is delivered to the heat
exchangers of the ADA.
The counter-heating in reheat mode is carried out via the
water heat exchangers installed in the system. The heat
pump function can not do this.
The maximum condenser capacity can be limited by the
"D_ElAcMaxPowerAllowed" signal.
Fig. 409 Reheat Mode
Double radial blower
Double radial blower
Fresh air
flaps
Sensor
pass. comp.
temperature
Sensor
blow-out
temperature
I/O-A module
Vehicle
Requirement
open / close
Heating valve
actuator
Fresh air
flaps
actuator
Analog input
HVIL 1 voltage
Analog input
HVIL 2 voltage
CAN interface
vehicle
SC620
4
5
1
2
3
6
7
24V
for hot water
heat exchanger
ADA
1 Solenoid valve
2 Solenoid valve HGA / actu-
ator (in 11123865_only)
3 Suction pressure sensor
4 High pressure safety switch
5 Low pressure safety switch
(not in 11123865_)
6 4-way reversing valve
7 High pressure sensor
Compressor activate
To Next Page
Loading...
