Installation; Mounting; Electrical Connection - Viessmann SCU124 Manual

SCU124

1. Installation

1.1 Mounting

cover
cable conduits with strain
relief
upper fastening
lower fastening

1.2 Electrical connection

VBus ®
sensor terminal
ground terminal
4
|
display
The unit must only be installed
push button
•
•
•
The controller must additionally be supplied from a double-
fuse 4A
pole switch with contact gap of at least 0.12".
Route sensor cables and power supply cables separately.
Î Unscrew the cross-head screw from the cover and
Î Mark the upper fastening point on the wall and drill
Î Fasten the enclosed wall plug and screw leaving the
Î Hang the housing from the upper fastening point and
104 mm
4.1"
Î Drill and insert the lower wall plug
Î Fasten the housing to the wall with lower fastening
Î Complete wiring connections in accordance with termi-
Î Place the cover back onto the housing
Î Fasten the cover by means of the cross-head screw
ATTENTION! ESD damage!
fuse
load terminals
power supply terminals
WARNING! Electric shock!
Opening the housing will expose
live parts!
Î Switch off power supply and discon-
nect the device from power supply
before opening the housing!
in a dry interior location
in a non-hazardous location
away from electromagnetic fields
remove it along with the cover from the housing
head protruding
mark the lower fastening point through the hole in the
terminal box (centers 5.1")
screw and tighten
nal allocations, see chap. 1.2 "Electrical connection"
Electrostatic discharge can lead to da-
mage to electronic components!
Î Take care to discharge properly
before touching the inside of the
device. To do so, touch a grounded
surface such as a radiator or tap!
Note:
The minimum pump speed must be set to 100 %
when auxiliary relays or valves are connected.