Auxiliary heater, location/purpose/design/function · gf8370s2100a · Mercedes-Benz WIS

GF83.70-S-2100A

Auxiliary heater, location/purpose/design/function

12.9.98

MODEL 638.094 /194 /294 with CODE (H12) Hot water auxiliary heater

MODEL 638.094 /194 /294 with CODE (HZ5) Hot water auxiliary heater 10 KW with timer

S83.70-2521-06

1 Jacket

2 Coolant inlet

3 Coolant outlet

4 Heater core

5 Burner housing

A34 Hot water auxiliary heater

A34.1 Main wiring harness connector to auxiliary heater

A34.2 Water pump auxiliary heater connector

A87 Hot water auxiliary heater with heater booster function

A87.1 Main wiring harness connector to auxiliary heater with heater booster function

A87.2 Water pump connector auxiliary heater

A72 Auxiliary heater control module

A72.3 Auxiliary heater connector in electric compartment

A74 Auxiliary heater control module with heater booster function

A74.3 Auxiliary heater connector with heater booster function in electric compartment

B94 Coolant temperature switch

B95 Overheating fuse

B96 Flame monitor

M54 Heater booster fuel metering pump

R18 Glow plug

M44 Combustion air blower

M19 Auxiliary heater fuel metering pump

Auxiliary heater, location		GF83.70-S-2100-01A
Purpose	Heating the coolant and the vehicle passenger compartment with engine standing still.
Design	The auxiliary heater (hot water auxiliary heater (A34/A87)) consists of the following components:  Hot water auxiliary heater control module (A72/A74)  Fuel metering pump (M19/M54)  Glow plug (R18)  Combustion air blower (M44)  Coolant temperature switch (B94)  Overheating fuse (M95)  Flame monitor (B96)  Burner housing (5)  Heater core (4)
Auxiliary heater, function		GF83.70-S-2100-02A