Commissioning; Before Operating The Appliance - Bosch ZBR16-3A Series Installation And Service Instructions Manual

8

Commissioning

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Fig. 60 Overview of the controls
[1] Emissions test button
[2] Service button
[3] Burner operation indicator lamp
[4] ON/OFF power switch
[5] Key pad lock
[6] ECO button
[7] Reset button
[8] Display
[9] Automatic air vent (ZWB..-3A combi boilers only)
[10] Boiler water pressure gauge
[11] DHW thermostat
[12] Safety relief valve discharge hose
[13] Condensate drain hose
[14] Heating return pipe
[15] Cold water pipe (ZWB..-3A combi boilers only)
[16] Gas pipe
[17] DHW pipe (ZWB..-3A combi boilers only)
[18] Supply pipe
[19] Boiler high limit dial
Greenstar
4 5 6 7
eco reset
18 17 16
8 9
15 14
8.1

Before operating the appliance

NOTICE: Commissioning without being properly filled
and purged will damage the appliance.
▶ Only operate this appliance after ensuring there is
sufficient water in the boiler and the system.
▶ Adjust the expansion vessel pre-charge pressure to the static head of
the heating system ( page 33).
▶ Open radiator and zone valves (as applicable).
▶ Open heating supply and return valves, fill heating system to 14.5 to
21.75 psi (1 - 1.5 bar) and close fill valve.
▶ Bleed all air from the system.
▶ If the boiler water pressure has dropped, fill the heating system again
to 14.5 to 21.75 psi (1 to 1.5 bar).
▶ On ZBR..-3A appliances (heating boilers) with a DHW tank, open the
cold water supply and open a DHW tap until water runs out.
▶ Verify that the gas type specified on the rating plate is the same as the
gas type used.
▶ Open the gas cock.
Commissioning | 51
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6 720 641 933-25.1O
6 720 806 992 (2015/03)