End Heater Operation During the Combustion Interval

End Heater Operation During The Combustion Interval, Function

Shown On Models 215, 220:

Operating procedure
1 The STH or heater booster heater is then in the combustion interval:
- The coolant circulation pump (A6m1) delivers the Coolant via the heat exchanger (2) and the heating and cooling circuits.
- Coolant temperature > 72 degrees C and < 77 degrees C:
The ventilation blower, initialized by the operating and control module (N18, N22 or N22/7), feeds pre-heated air into the interior.

2 The end of heater operation is triggered
- manually with the STH switch (N72s12 or S46),
- manually with the STH radio remote control transmitter (A8/3)

or

- independently by the STH or heater booster control module (A6n1) following the expiry of the maximum heating period.

NOTE: The STH switch (N72s12 or S46) directly initializes the STH or heater booster control module (A6n1) with the signal "Terminate heating".

3 The STH or heater booster control module (A6n1)
- switches the circulation pump (A6m1) off

and

- transmits the "Blower OFF" signal to the operating and control module (N18, N22 or N22/7) via the CAN Class -B (CAN-B).

4 The control and operating module (N18, N22 or N22/7) switches the ventilation blower off and switches from stationary heating mode to its normal operating mode.

5 Heater operation is over.
- The green or red indicator lamp in the STH switch (N72s12 or S46) is extinguished.

NOTE: The heating time can be coded for 10, 20, 30, 40, 50 or 60 minutes in the STH or heater booster control module (A6n1) via the STAR DIAGNOSIS diagnostic system.