Samsung DVM PLUS III Technical Data Book

Also see for DVM PLUS III: Technical data book Installation manual

Contents

V-105CONTROL SYSTEMSDemand capacity means the value that parameters of different units like required power and refrigerantamount are transformed into as a common number to make easy algebraic calculation.; NNNN oooo tttt eeeeMeasured powerconsumptionThrough centralized controllersand interface modulesIDU : Indoor unitThrough SiM unitsOperation information1. Outdoor/Indoor unitoperation2. Indoor unit fanoperation3. Stand-by operationIDU A’s electric powerconsumptionTotal powerconsumptionDemand capacity of IDU ATotal demand capacity of all IDUs= xPower distribution resultIDU A IDU BIDU CIDU D➊ DMS power distribution theoryAll the system information of power and indoor/outdoor operation is always monitored by the DMS for powerdistribution calculation.❷ Main capacityThis is determined dynamically with the combination of various refrigerating parameters such as differencebetween room and set temperature or evaporator input/output temperature.These parameters, as a result, determine the refrigerant amount flowing into the indoor unit by controllingEEV steps.❸ Fan capacityThis is constant value for indoor unit models. It differs depending on indoor units of different capacity.When the indoor unit starts Cooling, Heating, Auto and Fan modes, fan capacity values of the indoor units arealways monitored by the DMS. DMS gathers capacity of zero value when they stop operating.❹ Stand-by capacityStand-by capacity is constant for all indoor units regardless of their operations. Since stand-by power isconsumed all the time by PCBs and preheating coils in the outdoor unit, whose value is monitored with thesame fraction which is relatively small compared to main capacity or fan capacity.Here, Demand capacity = Main capacity + Fan capacity + Stand-by capacity05-3_control systems(082~141) 3/6/08 14:04 Page 105