Steca TR-A501T-U, Инструкция по установке и эксплуатации

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31
742.110 | 14.50
EN
10.3.5 Quick charge
Uses a higher loading temperature to load the upper region of the stor-
age tank more quickly in order to provide early prevention of back-up
heating by the conventional heating system. To do this, the loading
strategy of the storage tank is changed from differential loading to
absolute temperature loading as soon as the temperature in the upper
tank region drops below
T
on
*)
. At the same time, an attempt is made to
achieve a higher temperature in the storage tank by using the speed
control.
*) To retain the proven quick charging functionality , when T
on
is changed the value
of T
off
is changed in parallel.
Note
To use the quick charge function, the speed control must be switched
on; more information on this is provided in section 11, p. 39 (P08).
Display Characteristic min. max.
Factory
setting
Activation
on
,
oFF
oFF
Sensor input for upper storage tank
temperature
1 ... 5 –
Switch-on temperature T
on
32 °F 185 °F 125 °F
Switch-off temperature T
off
T
on
+ 4 F T
on
+ 20 F 130 °F
10.3.6 Freeze recirculation
Attempts to prevent freezing of the collectors by pumping heat from the
storage tank into the collectors:
• Collector temperature below 40 °F: solar circuit pump is switched on.
• Collector temperature above 45 °F: solar circuit pump is switched off.
The freeze recirculation function is only useful when the heat transfer
fluid contains insufficient or no anti-freeze. It is recommended to gener-
ally use heat transfer fluid with anti-freeze!
Notice
Despite the freeze recirculation function being activated, the solar sys-
tem can freeze under the following conditions:
• The storage tank is unloaded, a back-up heating system is not pre-
sent.
• Heat transfer fluid contains insufficient or no anti-freeze.
• Power outage
• Unsuitable position of the temperature sensor on the collector
• Collector sensor or cable is broken or has a short circuit.
• The collectors are installed in a position exposed to the wind.
• Solar circuit pump is faulty.
Note
This function cannot be active at the same time as the drainback function.
Display Characteristic min. max.
Factory
setting
Activation
on
,
oFF
oFF