en-US/C
A
51
Note
If the tank set option is actived along with
the spreaded loading function, the spreaded
loading function will only be active until
the set temperature of the selected tank is
reached.
Note
The absorption tank can only be selected in
3-tank systems with 3 pumps.
Pause control
LLOGI / PSPEE
Pause speed
Selection: ON / OFF
Factory setting: OFF
If the pause speed is activated, the relay of the tank
which has been loaded last remains switched on dur-
ing the loading break time. Speed is determined by the
value adjusted in nLO.
LLOGI / PDELA
Pump delay
Selection: ON / OFF
Factory setting: OFF
This function takes into account the actuation times
of valves and switches on the pump with a delay.
If the pump delay is activated, the corresponding relay
for the valve will be energized fi rst. The pump(s) will
be activated with the delay time (200s).
Note
In systems with pump logic, the parameter
PDELA is not available.
Cooling functions
Different cooling functions can be activated: system
cooling, tank cooling and heat dump.
Note
If the temperature at the tank sensor reach-
es 95 °C [200 °F], all cooling functions will
be blocked. The switch-on hysteresis is -2 K
[-4 °Ra].
System cooling
CooL / OSYC
System cooling option
Adjustment range: OFF / ON
Factory setting: OFF
Note
This function will only be available if the col-
lector cooling function and the heat dump
function are deactivated.
COOL / DTCO
Switch-on temperature diff.
Adjustment range: 1.0 ... 30.0 K [2.0 ... 60.0 °Ra]
in steps of 0.5 K [1.0 °Ra]
Factory setting: 20.0 K [40.0 °Ra]
COOl / DTCF
Switch-off temperature diff.
Adjustment range: 0.5 ... 29.5 K [1.0 ... 59.0 °Ra]
in steps of 0.5 K [1.0 °Ra]
Factory setting: 15.0 K [30.0 °Ra]
The system cooling function aims to keep the solar
system operational for a longer time. The function
overrides the maximum tank temperature to provide
thermal relief of the collector fi eld and the heat trans-
fer fl uid on hot days.
If the tank temperature is higher than the adjusted
maximum tank temperature and the switch-on tem-
perature difference DTCO is reached, the solar sys-
tem remains activated or is switched on. Solar loading
is continued until either the temperature difference
falls below the adjusted value DTCF or the collector
emergency shutdown temperature CEM is reached.
If the system cooling function is active,
is shown
on the display (fl ashing).
Summary of Contents for SCU345
Page 71: ...en US CA 71 Notes ...
