46 | Making the electrical connections
Greenstar FS
6 720 810 590 (2015/05)
7.2.3 Connecting an external heating zone pump or DHW
recirculation pump
Without accessories the appliance offers the connection of one heating
zone pump, one circulator of an unmixed heating circuit, or one DHW
recirculation pump.
The pump used must have the following connection values: 120 VAC,
max. 2 A.
▶ Route cable from pump to appliance.
▶ Insert cable into the junction box as shown in Fig. 45.
▶ Connect cable to the black plug according to Fig. 44.
Fig. 44 Attach plug (external pump)
[1] L (120 VAC, 60 Hz)
[2] PE (GND, Ground)
[3] N (Neutral)
[4] Black plug (in the junction box upon delivery)
▶ Connect black plugs and insert grommet until stop.
Fig. 45 Cable connected (external pump)
▶ Use service function 5.E, to set connection to 01 (DHW recirculation
pump) ( page 59)
-or-
▶ Use service function 5.E to set connection to 02 (external heating
zone pump in an unmixed heating circuit) ( page 59).
-or-
▶ Use service function 5.E to set connection to 03 (external heating
pump) ( page 59).
7.2.4 DHW tank loading pump or 3-way valve with spring return
(only heating boiler KBR..-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. 47.
▶ Connect cable to the red plug according to Fig. 46.
Fig. 46 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. 47 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).
The DHW recirculation pump is controlled by the Bosch
FW 200.
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