Bosch ZBR16-3A Installation And Service Instructions Manual page 13

Key to Fig. 5:
1 Heatronic boiler control
2 ON/OFF switch
3 Burner flame indicator
4 Service button
5 Emissions test button
6 Boiler high limit dial
7 Mounting socket for outdoor reset controls
8 DHW thermostat
9 Key pad lock
10 ECO button
11 Reset button
12 Display
13 Condensate trap
14 Test ports for inlet gas pressure
15 Adjustment screw, minimum gas volume
16 Maximum gas adjuster
17 Flue gas temperature limiter
18 Combustion air intake
19 Exhaust pipe
20 Boiler supply pipe
21 Connection for optional low water cut off (LWCO)
22 Additional supply temperature limiter
23 Manual air bleeder
24 Gas/air premix chamber
25 Fan
26 Bracket
27 Wall hanging bracket
28 Exhaust pipe
29 Sight glass
30 Set of electrodes
31 Supply temperature sensor
32 Boiler block temperature limiter
33 Inspection and cleanout cover
34 Condensate collector
35 Boiler circulator
36 Pump speed switch
37 Condensate drain hose
38 Drain cock
39 Safety relief valve discharge hose
40 Pressure relief valve (heating zone)
41 Boiler water pressure gauge
Copyright (optional information)
Information about the appliance | 13
6 720 643 068 (2011/06)