Remove/install control unit/heat exchanger unit - AR83.70-P-5935C

MODEL 129 as of 1.6.97, 215, 220, 240 with CODE (228) Stationary heater 

Fig 1: Identifying Control Unit/Heat Exchanger Unit Components

Only models 129 as of 1.6.97, 215, 220 

With modification year 00/1, the control unit (A6n1) has also been modified. It must be ensured that the control unit/heat exchanger unit up to and as of the modification year are not confused with one another.

	Removing
1	Remove burner element		AR83.70-P-5772C
2	Remove screws (1)
3	Disconnect burner housing (2) from the heat exchanger (4)	The heat exchanger (4) and STH control unit or heater booster (A6n1) form a unit.
4.1	Pull the vent hose (5) out of the vent drill hole (6) on the heat exchanger (4)	If installed!
5	Remove sealing rings (3) from the heat exchanger (4) housing
6	Remove sealant from the heat exchanger (4) and the burner housing
	Install
7	Insert sealing rings (3) into the seats on the heat exchanger (4) housing	Use new sealing rings.
8	Coat sealing surfaces on the heat exchanger (4) housing and on the burner housing (2) with sealant		*BR00.45-Z-1013-01A
9	Position burner housing (2) on heat exchanger (4) and insert screws (1)	Use new bolts. Coat the screw threads with locking compound.	*BR00.45-Z-1008-01A
10.1	Guide the vent hose (5) through the vent drill hole (6) into the heat exchanger (4).	If present.
11	Fully tighten bolts (1)	Model 129, 215, 220.	*BA83.70-P-1006-01A
		Stationary heater burner housing screw.
		Model 240	*BA83.70-P-1002-01C
		Stationary heater burner housing screw.
12	Remove sealant which has escaped from the area of the joint
13	Install burner element		AR83.70-P-5772C
14	Check emission level, adjust if necessary	Model 129	AR83.70-P-1177C
		Models 215, 220, 240	AR83.70-P-1177M

STATIONARY HEATER

HEATER UNIT OF STATIONARY HEATER