Bosch ZBR16-3A Installation And Service Instructions Manual page 40

40 | Installation
(200 mm)
=
1
Fig. 14 Hydraulics connection plate for heating boiler
ZBR..-3A (front view)
1 Heating supply, R 1" NPT
2 Gas, R 3/4" NPT
3 Heating return, R 1" NPT
(130 mm)
10 15/64"
(260 mm)
=
Fig. 15 Hydraulics connection plate for heating boiler
ZBR..-3A (top view)
6 720 643 068 (2011/06)
7 7/8"
=
2 3
6 720 641 933-89.1O
5 1/8"
=
6 720 641 933-15.1O
7 7/8"
(200 mm)
=
1 2
Fig. 16 Hydraulics connection plate for combi boiler
ZWB..-3A (front view)
1 Heating supply, R 1" NPT
2 DHW, R 3/4" NPT
3 Gas, R 3/4" NPT
4 Cold water, R 3/4" NPT
5 Heating return, R 1" NPT
5 1/8"
(130 mm)
10 15/64"
(260 mm)
=
Fig. 17 Hydraulics connection plate for combi boiler
ZWB..-3A (top view)
B Determine pipe size for the gas supply.
B To fill and drain the system, install a fill and drain valve
at the lowest point.
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3 4 5
6 720 641 933-90.1O
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6 720 641 933-14.1O
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