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KWL Hygrobox KWL HB.. EH/WW
Installation and Operating Instructions
18. Wiring diagram
Connecting terminals 1 to 24 are la-
belled on the main board and designed
as relay outputs with 230 V (see figure).
With regard to the design with the water
heater battery, the 3-way motor mixer
valve and the circulation pump are con-
nected to the following relay outputs:
3-way motor mixer valve
(terminals 15 to 18):
Terminal 15 - phase mixer closed
Terminal 16 - phase mixer open
Terminal 17 - zero conductor
Terminal 18 - neutral conductor (earth)
Circulation pump (terminals 19 to 21):
Terminal 19 - phase
Terminal 20 - zero conductor
Terminal 21 - neutral conductor (earth)
The air humidification unit can be swit-
ched off (open contact) and on (closed
contact) in parallel with the ventila-
tion device with the
ventilation unit
switch input
. The switch input must be
activated in the Expert menu if auto-
matic synchronous operation cannot be
guaranteed because the sound level is
too low.
In the case of an
external tempera-
ture sensor
, a sensor can optionally
be connected, on the basis of which
the air outlet temperature is controlled
automatically. This is only required in
connection with a second heater battery
(low-temperature heater/air heater).
The
floating output
can be used for a
function check with an external regu-
lating and control unit for the possible
visualisation of faults.
E-heater batteries 1, 2, 3
and the
fan
unit
are only active in the electric ver-
sion.
