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1.

Installation

1.1 Mounting

front cover
cable gland with strain relief
fastening
fastening
1.2 Electrical connection
sensor terminals
ground terminals
VBus
®
display
The unit must only be located in dry interior locations. It
is not suitable for installation in hazardous locations and
should not be placed close to any electromagnetic fields. The
push button
controller must additionally be supplied from a double-pole
switch with contact gap of at least 3 mm. Please pay attention
to separate routing of sensor cables and mains cables.
fuse 4A
1. Unscrew the cross-head screw from the cover and
2. Mark the upper fastening point on the wall and drill and
3. Hang the housing from the upper fastening point and
4. Fasten the housing to the wall with lower fastening screw
The power supply to the controller must be carried out
via an external power switch (last step!) and the supply
fuse
voltage must be 115 V~ (50 ... 60 Hz). Flexible cables must
be attached to the housing with the enclosed strain relief
and the corresponding screws.
The controller is equipped with either 1 relay to which
loads such as pumps, valves, etc. can be connected:
• Relay 1
load terminals
Temperature sensors (S1 to S4) have to be connected
mains terminals
to the following terminals (either polarity):
1 / 2 = sensor 1 (e.g. sensor collector 1)
3 / 4 = sensor 2 (e.g. sensor tank 1)
5 / 6 = sensor 3 (e.g. tank top sensor)
7 / 8 = sensor 4 (e.g. return temperature sensor)
The power supply connection has to be carried out via
the following terminals:
19 = neutral conductor N
20 = conductor L
12 = ground clamp
WARNING!
Always switch-off power supply and
disconnect the controller from the
mains before opening the housing!
remove it along with the cover from the housing.
fasten the enclosed wall plug and screw leaving the head
protruding.
mark the lower fastening point through the hole in the
terminal box (centres 130 mm). Drill and insert the lower
wall plug.
and tighten.
18 = conductor R1
17 = neutral conductor N
13 = ground clamp
Electrostatic discharge can lead to damage to elec-
tronic components!
Dangerous voltage!
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