Remove/install combustion air blower

AR83.70-D-5557A

19.11.02

MODELS 901.0 /3 /4, 902.0 /3 /4, 903.0 /3 /4, 904.0 /3 /4 with CODE (H12) Hot water auxiliary heater

MODELS 901.6, 902.6, 903.6, 904.6, 905.6 with CODE (H12) Hot water auxiliary heater

MODEL 901.6, 902.6, 903.6, 904.6, 905.6 with CODE (HZ9) Heater booster, diesel engine

MODELS 901.6, 902.6, 903.6, 904.6 with CODE (HZ5) Warm air auxiliary heater 10 kW with timer

MODELS 638.0 /1 /2 as of 13.10.97 with CODE (H12) Warm water auxiliary heater
D5WS or B5WS

D83.70-1268-06

1 Glow pin

2 Cover for combustion air blower

3 Control module for auxiliary heater/heater booster

4 Combustion air blower

5 Cover

6 Cover plate

7 Jacket housing

8 Flame sensor

 	Remove/Install
Danger!	Risk of explosion from fuel vapors, risk of poisoning from inhaling combustion gases and risk of injury from burns during and after operation of heater unit	Do not operate stationary heater, auxiliary heater or engine with heater booster in closed areas or while filling fuel tank. Allow heater unit to cool down after operation and wear protective gloves.	AS83.70-Z-0002-01A
Danger!	Risk of explosion from fuel igniting, risk of poisoning from inhaling and swallowing fuel as well as risk of injury to eyes and skin from contact with fuel.	No fire, sparks, naked flames or smoking. Pour fuels only into suitable and appropriately marked containers. Wear protective clothing when handling fuel.	AS47.00-Z-0001-01A
1.1	Remove heater unit	Models 901.0/3/4, 902.0/3/4, 903.0/3/4, 904.0/3/4	AR83.70-D-5302F
		MODEL 901.6, 902.6, 903.6, 904.6, 905.6	AR83.70-D-5302I
		Model 638	AR83.70-S-5335B
1.2	Remove heater booster	Models 901.6, 902.6, 903.6, 904.6 with warm water auxiliary heater 10 kW with timer Code HZ5	AR83.70-D-7100A
2	Remove control module for auxiliary heater/heater booster (3)		AR83.70-D-5939A
3	Remove cover (5)
4	Remove cover (2) on combustion air blower (4)
5	Remove heating element (1)	Models 901.0/3/4, 902.0/3/4, 903.0/3/4, 904.0/3/4, 638 MODELS 901.6, 902.6, 903.6, 904.6, 905.6 up to 292870 up to 27.06.01	AR83.70-D-5757A
		MODELS 901.6, 902.6, 903.6, 904.6, 905.6 as of 292871 as of 28.06.01	AR83.70-D-5757B
6	Remove flame sensor (8)		AR83.70-D-5683C
7	Remove combustion air blower (4) from jacket housing (7)
8	Remove cover plate (6) and clean sealing surfaces	 Installation: Install new gasket
9	Install in the reverse order
10.1	Check auxiliary heater/heater booster for proper operation	Models 901.0/3/4/6, 902.0/3/4/6, 903.0/3/4/6, 904.0/3/4/6, 905.6,
10.2	Check function of stationary heater	Model 638	AR83.70-S-5302-02A

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