GF83.70-D-4210H ZUH Heater, Component Description

GF83.70-D-4210H ZUH Heater, Component Description
MODEL 906.111 /113 /131 /133 /135 /153 /155 /211 /213 /231 /233 /235 /253 /255 /611 /613 /631 /633 /635 /637 /653 /655 /657 /711 /713 /731 /733 /735
- with CODE (HZ9) Heater booster, diesel

MODEL 906.611 /613 /631 /633 /635 /637 /653 /655 /657 /711 /713 /731 /733 /735
- with CODE (HZ5) 10 kW warm water auxiliary heater with timer







20 Heater booster unit

Location
The heater booster heater unit is located on the vehicle underside between the left vehicle rocker panel and the vehicle tank on the level of the B-pillar.

Task
When the engine is running ("circuit 61 ON"), the heater booster heater unit generates the heat needed to warm up the interior compartment by heater operation.







Design
20 Heater booster unit
21 Casing
22 Combustion air blower with blower motor (N33/2m1)
23 Cover of combustion air blower with blower motor (N33/2m1) (22)
24 Combustor with downpipe
25 Heat exchanger
26 Cover of blower motor (N33/2m1)
27 Cover for casing (21)
28 Coolant inlet connection
29 Coolant outlet connection
30 Gasket between casing (21) and combustion air blower with blower motor (N33/2m1) (22)
31 Fitting for glow pin (N33/2r1) with fuel feed line
32 Gasket between combustor with downpipe (24) and combustion air blower with blower motor (N33/2m1) (22)
33 O-ring
34 Soft trim with O-rings for the fitting of glow pin (N33/2r1) with fuel feed line (31)
35 Bracket for fitting of glow pin (N33/2r1) with fuel feed line (31)
36 14-pin connector for warm water auxiliary heater 2 control unit (N33/2)
37 Line for circulation pump (M13/4)
38 Push spring for temperature sensor (N33/2b1) and overheating sensor (N33/2b3)
N33/2 Warm water auxiliary heater 2 control unit
N33/2b1 Temperature sensor
N33/2b2 Flame sensor
N33/2b3 Overheating sensor
N33/2m1 Blower motor
N33/2r1 Glow pin