Novar 1xxx KMB systems
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4.1.17.2 Switching Cooling and Heating
The two highest outputs can be set to switch cooling (fan) and heating, for example as follows:
14-F
14-F14-F
14-F....output 14 set to switch cooling (fan)
13-H
13-H13-H
13-H....output 13 set to switch heating
With the above setting, these outputs are controlled in function of the measured instantaneous
temperature. You can specify the threshold temperature to switch the cooling in parameter 59. If the
temperature drops below the threshold value, the relevant output closes and vice versa. Analogously,
parameter 60 is for specifying the heating threshold temperature to make the relevant output open if it
is exceeded.
Switching thresholds’ hysteresis is about 5°C.
4.1.17.3 Alarm Signalling ( Novar 10xx only )
The two highest outputs can be used for Alarm state signalling at Novar 10xx controllers. For one of
the outputs to be used as Alarm relay, it is necessary to set the output to one of following :
• 8-A
8-A8-A
8-A .… output 8 set to Alarm signalling; if Alarm state active, the output is opened
• 8-A
8-A8-A
8-A. …. ( = „A“ with decimal point ) output 8 set to Alarm signalling; if Alarm state
active, the output is closed
When Alarm function set, Alarm state is indicated not only by Alarm LED, but by opening/closing of
appropriate relay too.
4.1.18 Parameter 27 – Limit Power Factor for Compensation by Choke
In basic choke compensation mode this parameter specifies power factor value at which the controller
starts using, besides capacitive sections, inductive compensation sections for compensation as well –
chokes (if available).
If the power factor measured is more inductive (current more lagging) than the value specified in this
parameter, the controller uses only capacitive sections (capacitors) to control compensation.
If the power factor in the power system changes so that it is more capacitive (current more leading)
than the limit value for compensation by choke, the controller starts using combination of capacitive
and inductive compensation sections for compensation.
Exception: This rule does not apply when offset control ( par. 63 ) is activated ! In this case,
the value of measured power factor is not essential and the controller uses both capacitive
and inductive sections, regardless of its value. This is true even if the offset value ( par. 5/11 )
is set to zero.
When set to value S
SS
S, so called symmetric choke compensation mode is activated.
By default this parameter’s value is set as undefined (-
--
-.--
----
-- displayed) in a shipped controller or after
its initialization. With this setting the controller does not use chokes that are available (such sections
are permanently disconnected) and it does not even detect available chokes in the automatic section
power recognition process.
Compensation by chokes is described in more detail in an appropriate chapter further below.
4.1.19 Parameter 30 – Alarm Setting
Novar line controllers feature two alarm type functions that are independent of each other:
• alarm indication
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