BMW 3: Stationary cooling

Owing to the fact that the air conditioning compressor in the G20 PHEV is electrically operated and that the high-voltage battery unit has high energy and power densities, a stationary climate control function is offered to the customer in the G20 PHEV. For stationary air conditioning, the IHKA decides which measures are required for stationary heating, stationary cooling or stationary ventilation.

Prerequisites for activation of the stationary climate control are:

• Sufficient state of charge of the high-voltage battery unit (state of charge > approximately 30%) or charging cable connected
• Engine switched off or driving readiness deactivated
• Ventilation outlets are open, allowing the air to escape.

The customer has various options for activating the stationary climate control:

• Via the menu in the CID, switch on directly or program a time
• Via the button on the ID transmitter
• Via BMW Connected app.

The heat exchanger of the G20 PHEV is integrated in the coolant circuit of the combustion engine.

With corresponding heating up by the combustion engine a sufficient heater output for heating the passenger compartment can be achieved. Due to its hybrid concept, the combustion engine of the G20 PHEV generates significantly less heat loss in many driving situations and is not able to heat the coolant circuit to the necessary temperature. This is why the G20 PHEV has electrical heating.

In principle, this functions similar to an instantaneous water heater. Via a changeover valve a separate heater circuit can be formed, which is kept in circulation by an electric coolant pump.

The electrical heating is a high-voltage component

High-voltage component warning sticker

Each high-voltage component has on its housing an identifying label that enables Service employees and vehicle users to intuitively identify the possible hazards that can result from the high electric voltages used.

Only Service employees who satisfy all the prerequisites are permitted to work on the designated high-voltage components: suitable qualifications, compliance with the safety rules, procedure following the exact repair instructions.

For reasons of high-voltage safety and the warranty, the electrical heating must not be opened or otherwise dismantled.

G20 PHEV, heater circuit in the high-temperature coolant circuit

1. Radiator
2. Coolant temperature sensor (radiator outlet)
3. Electric fan
4. Electric coolant pump
5. Crankcase
6. Cylinder head
7. Exhaust turbocharger
8. Pressure relief valve
9. Coolant pump
10. Coolant temperature sensor, engine outlet
11. Electrical split cooling valve
12. Heat management module
13. Engine oil/coolant heat exchanger
14. Electrical heating (EH)
15. Heat exchanger for heating system
16. Expansion tank
17. Electric coolant pump (heater circuit)
18. Electrical changeover valve

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