Schwank ThermoControl Plus 2 - Manual (Page 27)

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6.7 Exhaust fan output connection
Only 24VAC Class 2 equipments can be connected to the controller ! Use a 24VAC Class 2
rated power relay to provide 120Vac power to each exhaust fan. The ThermoControl Plus is
provided with a flue fan control. Two control circuits (heating zones) outputs belong to one
common flue fan control. For example: clamp 10-11 is the common flue fan of control for heating
zone 1 and 2.
In case that one (or both) heating zone outputs are activated, the exhaust fan control will be
activated as well. If both heating zone outputs switch off, the exhaust fan also switches off
immediately or delayed after a programmable period of time (chapter 5.2)
In case that single stage operated heaters are divided into two heating zones and one zone is
switched off, the flue fan runs-on due to the still activated second heating zone (chapter 4.1.2.). If
no flue fan is installed or connected, the exhaust fan control can be locked (chapter 5.2)
6.8 Alarm contact input (e.g.: Fire Alarm system input, etc.)
Connect dry contact to this input. The contact must be provided by low voltage Class 2 rated
equipment. If the dry contact is interrupted, the controller switches off all heaters and exhaust fans
independently. At the same time “ERROR” starts to blink on the display and the “ALr” symbol
appears in the display. If the contact is not used, bypass the connections.
6.9 Remote-Control
Connect dry contact to this input. The contact must be provided by low voltage Class 2 rated
equipment.
The feature Remote-Control can be selected in the SETUP-Menu (5-2). The controller switches to
day mode
in both zones, if the remote contact is activated. The display shows the symbol. If
the remote contact is not used, bypass the connections.
6.10 Signal input fault
Connect dry contact to this input. The fault signal must be provided by low voltage Class 2
rated equipment.
The feature contact input fault can be selected in the SETUP-menu (5-2). The external error
message can be connected to inputs 72-73. In case of an error message (option) the signal ERR
and RES as well as ERROR light begins to blink. At the same time the Error relay switches on. The
operation mode of the controller is not changed due to the error signal.
6.11 Temperature display ºF / ºC selection
Switch off main power supply before making any changes to this jumper! Select the ºF / ºC
temperature display mode by jumper location (see figure 6.4 Wiring Connection ). After selecting
the readout all displays and settings will automatically appear with the selected mode. Factory
setting of this selection is ºF. Set values for ºF / ºC are stored separately - after modifying selection
you must set actual values (no automatic conversation here).
If the remote contact is activated it
is not possible to change the
operating mode by using the
FIX
button. A warning signal "rE.c"
(remote contact) appears in the
display.