10
Maximum exhaust gas temperature hysteresis [Fh20]
– this parameter describes
how much exhaust gas temperature should drop in relation to maximum temperature
for the controller to stop [Hot ] alarm and resume normal work.
6.7. Fuel shortage testing.
If central heating installation is equipped with exhaust gas temperature sensor
(
[Fc 1]
), then fuel shortage testing starts when exhaust gas temperature falls below
temperature set with additional thermostat knob. If there is no exhaust gas
temperature sensor (
[Fc 0]
), then fuel shortage testing starts when boiler water
temperature falls below value of
[L 65]
. If temperature tested during fuel shortage
testing stays below threshold for specified time, the controller will stop regulation
process and will show
[FUEL]
message on the display. This alarm can be erased with
STOP button.
Fuel shortage testing time during boiler start [Fd60]
– time set with this parameter
is used when testing fuel shortage during boiler start. Boiler is considered starting from
the time when the controller is switched from STOP mode to WORK mode and ends
when boiler temperature reaches minimum temperature (set with
[L 65]
parameter).
Setting
[Fd60]
parameter to „--” disables fuel shortage checking during boiler start.
Fuel shortage testing time in work mode [Fb30]
– time set with this parameter is
used when testing fuel shortage after boiler has started. Setting this parameter to „--”
disables fuel shortage checking in WORK mode.
6.8. Additional output.
Additional output work mode [Ar 0]
- the controller is equipped with a multipurpose
output that can work in one of following modes:
-
[Ar 0] mode
- output may control oil or gas boiler if such boiler exists in the
heating circuit. After switching the controller on with the main power switch, the
additional boiler is turned off and it turnes on again when there is no fuel in the solid
fuel boiler. This function is useful in heating systems where the solid fuel boiler is used
to cut heating costs. After erasing no fuel alarm by pressing STOP button, the
additional boiler is again turned off and the controller works again.
-
[Ar 1] mode
- output may control additional alarm signaling system. Boiler
temperature sensor malfunction, overheating or no fuel alarm will turn on the
additional alarm.
-
[Ar 2] mode
- output may control boiler emergency cooling system (e.g. pump).
In this mode the additional output is turned on in case of boiler overheating or boiler
temperature sensor error alarm.
-
[Ar 3] mode
- output may control devices working together with blow-in fan.
CAUTION.
Equipment should be connected to additional output using UM-1module.
Connection schemes are shown on picture 3.
