Viessmann VITOLIGNO 300-C Installation And Service Instructions Manual page 43

Vitoligno 300-C Installation/Service
Electrical Connections
Accessory power supply connections (factory wired)
Legend
A Power supply for accessories sL a,S
B Power supply for heating circuits (A1, A2 and A3)
C Neutral jumper for accessories sL a,S
D Neutral jumper for heating circuits (A1, A2 and A3)
E Power supply for auger system connection sYF, sYG,
sYH and sYK
Safety equipment connections (accessory)
LWCO
Power supply
(by others)
A
Legend
A Low water cutoff device (typical)
Auxiliary safety equipment connections (field supplied)
A
Legend
A Periphery safety equipment
(continued)
DIN rail X1
DIN rail X2
DIN rail X2
F3 120VAC 10A
F4 120VAC 10A
All jumpers are factory installed based on accessories
connected to the Ecotronic control.
Make connections for switching contact of the low water
cutoff at terminals 1 and 2 of aBD.
Supply low water cutoff with power (there are no
provisions for LWCO power from the Ecotronic control,
the power supply is field supplied).
Install periphery safety equipment on terminal aBS, when
no periphery safety equipment is being used, install a
jumper across terminals 1 and 2 (field supplied).
Installation
43