Install Instructions

Making the electrical connections | 49
6 720 806 992 (2013/09)Greenstar
7.3.3 DHW tank loading pump or 3-way valve with spring return
(only heating boiler 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. 54.
▶ Connect cable to the red plug according to Fig. 53.
Fig. 53 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. 54 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 59).
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. 56.
▶ Connect cable to the white plug according to Fig. 55.
Fig. 55 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. 56 Cable connected (mains power supply)
▶ Mount junction box on the rail.
1
2
3
4
6 720 641 933-37.2O
L PE N
white
Mains
120V/60Hz
L PE N
red
Storage
tank pump
L PE N
black
CH pump
for mixed heating
8 737 701 503
I III III III
6 720 641 933-38.1O
1
2
3
4
6 720 641 933-36.2O
L PE N
white
Mains
120V/60Hz
L PE N
red
Storage
tank pump
L PE N
black
CH pump
for mixed heating
8 737 701 503
I III III III
6 720 641 933-39.1O