ST-460 - Watt

IV.d) PumpsTechIV.d.1) Regulated rotationsUsing this function, the user specifies the mode of pump operation.Fixed rotations, when the pump operates all the time with full power(always when its operation is active), or regulated rotations areavailable. When the regulated rotations are selected, the icon of thisparameter should be marked as active.IV.d.2) Maximum collector temperatureBy means of this setting, the user declares the value of thecollector's maximum alarm temperature at which the pump may bedamaged. The temperature should be set in accordance with thetechnical data of the collector involved. Due to the glycol "gelling"phenomenon at high temperatures and the risk of damaging the solarpump, after reaching the maximum alarm temperature it will bedeactivated (the regulator switches to the collector overheating mode).IV.d.3) Solar pump activation deltaThis function determines the difference between the collectortemperature and the second tank temperature at which the pump startsto work (it is the threshold pump activation value)IV.d.4) Solar pump deactivation deltaThis function determines the difference between the collectortemperature and the second tank temperature at which the pumpdeactivates (so as to avoid cooling down the tank)IV.d.5) Gear ratioThis parameter is only active, if the pump rotations are set for theregulated mode. When the conditions of pump activation are met, it isactivated initially at minimum speed (operational minimum of the solarpump). Then, the pump increases the rotations according to the settingof this ratio, which determines at how many °C of difference between thecollector temperature and the tank temperature the pump will increasethe rotations by 10%.- 23 -