Appendix E: Wiring Hydrolevel Safgard 1100 Low Water Cut-Of To Greenstar Floor Boiler - Bosch FS 100 Manual

7 2 | Bosch Greenstar
Appendix E: Wiring Hydrolevel safgard 1100 Low Water Cut-Of
to Greenstar Floor Boiler
Main Power
Supply
120 V
Ground
Neutral
Transformer
24 VAC
120 VAC
Install a 24VAC 20VA Transformer near the boiler
Follow LWCO manufacturer's instructions
Connect the lead labeled BOILER GROUND (green) to the ground wire of the white plug in the boiler
junction box
Connect the leads labeled 24V HOT(red) and 24V COMMON(white) to the external 24VAC transformer
(field supplied)
AT the Low Voltage box on the rear of the boiler, remove the jumper acros the LWCO connections and
connect the leads labeled SWITCH CONTACT (yellow) to these connections.
Data subject to change
L N
L N
red
white
mains storage ch pump
tank pump for unmixed heating
120v/60 hz
Green
White
Red
Hydrolevel Safgard 1100
Low Water Cut-Off
External Junction
Box on back of
Greenstar Floor
L N
boiler
black
Low Voltage Junction
Box on back of floor
boiler
out sen
BUS TT
3
1 2
Yellow
Yellow
Applications Manual
LWCO DHW sen
4
5 6
Bosch Thermotechnology Corp.