Thermo Technologies USDT 3002 - Manual (Page 10)

USDT 3002
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4.1.7 ∆ Delta T Adjustment
Type of antifreeze:
0 : water
1 : propylene glycol
2 : ethylene glycol
3 : Tyfocor ® LS / G-LS
kWh/MWh: Collected
Energy in kWh / MWh
Display channel
MEDT: Type of antifreeze
Adjustment range 0 ... 3
Factory setting 1
MED%: Concentration of
antifreeze in (Vol-) %
MED% is blinded out by
MEDT 0 and 3.
Adjustment range 20 ... 70
Factory setting 45
The transportation of collected energy is measured by the
volume flow (S1) and the return flow (S4). These references
are displayed in both kWh and MWh in their respective
channels. The sum of all channels = total heat output.
As soon as one of the display channels of the collected
energy is selected, the symbol
is permanently shown
on the display. The center button (SET) must be pressed for
approx. 2 seconds in order return to RESET-mode of the
counter. The display-symbol is flashing and the energy
value will be set to 0.
Pressing the center button again saves the adjustmentIf
adjustments are not made within 5 seconds the RESET pro-
cedure is interrupted. The controller returns automatically
into indication mode.
Please note: Switch-on temperature difference DO must
be at least 2 °Ra higher than the switch-off temperature-
difference DF.
DT O:
Switch-on temperature
Adjustment range
2,0 ... 40,0 °Ra
Factory setting 12.0
DT F:
Switch-off temperature diff.
Adjustment range
1,0 ... 38 °Ra
Factory setting 8.0 °Ra
Primarily the controller works in the same way as a standard
differential controller. If the switch-on difference (DT O)
is reached, the pump is activated. If the adjusted switch-off
temperature is underrun (DT F), the controller switches-
off.
4.1.8 Maximum tank temperature
If the adjusted maximum temperature is exceeded, a
further loading of the tank is stopped so that damage
through overheating can be avoided. If the maximum tank
temperature is exceeded, on the display is shown and .
Please note: The controller is equipped with a security-
switch-off of the tank, which avoids a further loading of the
tank if 203 °F are reached at the tank.
S MX:
Maximum tank temp.
Adjustment range
40 ... 205 °F
Factory setting 140 °F
4.1.9 Emergency Shutdown of Collector
Collector emergency shutdown
If the adjusted collector limit temperature (EM) is exceeded,
the solar pump (R1/R2) is deactivated in order to avoid a
damaging overheating of the solar components (collector
emergency shutdown). The limit temperature is set to
285 °F but may be changed within the adjustment range of
230 ... 400 °F. This is displayed as (flashing).
EM:
Limit collector temperature
Adjustment range
230 ... 400 °F,
Factory setting 285 °F