Menu
Electrolux Premium Quick Reference Manual
                                      | |
Doc. No.: 560001 EGPage:22 Ed.1" 08-2014From ser. no.:E N G L I S Hdt2: end defrost temperature set point, auxiliary evaporatordt2 acts in the same way as parameter dt1 described above, but referring to the auxiliary evaporator.Note for dt1 and dt2: in the defrost by temperature, the parameter establishes the threshold for activating or deactivating thecorresponding defrost relay.Default: dt2 =4°C.dP1: Maximum evaporator defrost durationDetermines the maximum defrost duration on the evaporator in minutes (or seconds, see parameter dC) if defrost by temperature isselected. If timed defrost has been selected, this is the actual duration of the defrost. Default: dP1=30 minutes.dP2: Maximum defrost duration, auxiliary evaporatorAs for parameter dP1 described above, but refers to the auxiliary evaporator.Default: dP2=30 minutes.d3: Defrost start delayThis parameter determines the time that must elapse, when the defrost is activated, between thestopping of the compressor (electric heater defrost) or the starting of the compressor (hot gas defrost), and the activation of thedefrost relays on the main and auxiliary evaporators.The delay d3 is useful, in the hot gas defrost, to ensure a sufficient quantity of hot gas for the defrost before the activation of the cyclereversing valve, in very special applications (see paragraph “Description of software functions”). Default: d3=0 minutes.d4: Defrost when the instrument is switched onActivates a defrost when the instrument is switched on.Warning: this request has priority over the activation of the compressor and the continuous cycle.The possible values are:d4=0, no defrost is performed when the instrument is switched on;d4=1, a defrost is performed when the instrument is switched on.Starting a defrost when the instrument is switched on may be useful in special situations.Example: frequent power drops occur in the system, which cause the internal clock to be reset. This clock calculates the intervalbetween two defrosting operations, restarting from zero. If the frequency of the power failure were, in an extreme case, greaterthan the defrost frequency (e.g. a power failure every hour, against a defrost every 10 hours) the controller would never perform adefrost. In a situation of this type, it is preferable to enable defrost on start-up, above all if the defrost is controlled by temperature(probe on the evaporator), therefore avoiding unnecessary defrosts or at least reducing the running times. In the case of systemswith a large number of units, if selecting defrosts at start-up, after a power failure all the units will start defrosting, thus causing avoltage overload. To overcome this, the parameter d5 can be used. It adds a delay before the defrost, and this delay must obviouslybe diff erent for each unit.Default: d4=0 the instrument does not perform a defrost on start-up.Available on all models except for IR33M.d5: Defrost delay when the instrument is switched on or from multifunction inputThe time that must elapse between start-up of the controller and the start of the defrost.• if the digital input is used to enable the defrost (see parameter A4, A5, A9=3) or to start a defrost from external contact (seeparameter A4, A5, A9=4), the parameter d5 refers to the delay between enabling of the defrost or request to enable, and theeff ective start.• the defrost digital input (see parameter A4, A5, A9) can be usefully employed to perform defrosts in real time, connecting a timerto the input. The defrost will be activated when the timer contact closes.• If several units are connected to the same timer, parameter d5 should be used to delay the various defrosts, thus avoiding poweroverloads.In addition, to avoid unwanted defrosts started by the clock inside the instrument, set parameter dI=0 (manual defrosts only,started from the keypad, by the RTC, by the calculation of the compressor running time or by the multifunction contact).Important warning: when connecting a series of units to the same timer, the best solution is to insulate all the contacts galvanically,fi tting intermediate relays for each contact.Default: d5=0 => no delayed defrost when switching the instrument on or following the activation of the multifunction input. |
Related manuals for Electrolux Premium
Product
Learn More
Legal
Copyright © 2024 OneStart. All Rights Reserved