Dhw Tank Loading Pump Or 3-Way Valve With Spring Return (Only Zbr; Connecting Mains Power Supply - Bosch Greenstar Series Installation And Service Instructions For Contractors

Electrical connection
7.3.3 DHW tank loading pump or 3-way valve with spring return
(only ZBR...-3A)
The pump used must have the following connection values: 120 VAC,
max. 2 A.
▶ Route cable from pump or 3-way valve to appliance.
▶ Insert cable into the junction box as shown in Fig. 57.
▶ Connect cable to the red plug according to Fig. 56.
Fig. 56 Attach plug (external DHW tank loading pump or 3-way valve)
[1] L (120 VAC, 60 Hz)
[2] PE (GND, Ground)
[3] N (Neutral)
[4] Red plug (in the junction box upon delivery)
▶ Connect red plugs and insert grommet until stop.
Fig. 57 Cable connected (external DHW tank loading pump or 3-way
valve)
▶ Mount the 3-way valve for space heating operation when de-
energized, and DHW tank loading when energized.
▶ Use service function 1.F to set pump mode ( page 57).
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6 720 641 933-37.2O
6 720 641 933-38.1O
7.3.4

Connecting mains power supply

▶ Route the power cable (AC 120 V, 60 Hz) from the emergency
shutoff switch to the boiler.
▶ Insert cable into the junction box as shown in Fig. 59.
▶ Connect cable to the white plug according to Fig. 58.
Fig. 58 Attach plug (mains power supply)
[1] L (120 VAC, 60 Hz)
[2] PE (GND, Ground)
[3] N (Neutral)
[4] White plug (in the junction box upon delivery)
▶ Connect white plugs and insert grommet until stop.
Fig. 59 Cable connected (mains power supply)
▶ Mount junction box on the rail.
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6 720 641 933-36.2O
6 720 641 933-38.1O
Greenstar – 6721822579 (2021/01)