Schwank ThermoControl Plus 4 - Manual (Page 5)

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2 Safety
This is a 24VAC Class 2 low voltage
(24Vac) temperature controller. Use
only Class 2 rated power supply. Do
not install on voltages higher than
30Vac.
Read all information in this manual
before installing or programming the
appliance. Electrical installation and
wiring must conform to local and
national building and electrical
codes. Check the electrical
equipment regularly. Defective wire
etc. must be replaced immediately.
Be sure that power routed to the
controller has been powered ‘off’
before beginning installation or
installation of communication
modules. Lock out the power supply.
The Schwank ThermoControl Plus 4
must be mounted where it is not
affected by vibration or shock.
The feed/supply line must be
protected by the installer with a fuse
of maximum 16 A.
Install the ThermoControl Plus 4
ensuring conformity to the wiring
diagram located in the switchboard.
Minimum Wiring Connection:
It is the installer’s responsibility
to ensure that wire gauge is
sufficient to provide 24Vac from
the transformer to the controller,
and from the controller 24Vac
outputs to the external relays
that power heaters and exhaust
fans. The distance between the
power source and equipment
must be considered.
 24Vac power from 100VA
transformer to the controller
with minimum 16 AWG wire
 24Vac from controller outputs
to equipment power relays
with minimum 16 AWG wire
 Connect sensor to controller
with minimum 18 AWG wire
Install the IR temperature sensor
between the radiant area of two
heaters at a height of 6 ft (2 m)
above floor. In this location the
controller receives the optimal
value of the comfort temperature
(radiant temperature plus
ambient temperature).
NOTE:
If heating zones are dimensionally
large in size or there are extreme
temperature gradiants within the
zone, temperature averaging can
be achieved using four IR sensors
wired in parallel-series for each
zone.