Samsung AC777MXAD7H series Installation Manual

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Samsung AC777MXAD7H series Installation Manual Manual pdf 22 page image

22Installation ProcedureEnglishInstallation ProcedureInstruction for installation and operation• You should install the DPM according to the aboveinstallation specification and eliminate the factorsthat give electrical load to the both indoor units wheninstalling and operating. (Heater / window / frontdoor / ventilation / partition that divides space)• You should provide sufficient instructions about theoperation method and specification features to usersand fill in caution phrases on wired remote controllerwhen necessary.– to be controlled simultaneously.>Set up indoor quantity by key switch(K1, K2)• Press and hold K1 switch to enter the setting modeon the number of the installed indoor unit : Check“A0” sign on 7-segment– Press K2 switch to set the number of the installedindoor unit :Ex) If there are two indoor units, press K2 switchtwice, and check "A2" sign on 7-segment.If there are three indoor units, press K2 switchthree times, and check "A3" sign on 7-segment.If there are four indoor units, press K2 switchfour times, and check "A4" sign on 7-segment.– Press K1 switch to complete setting the numberof the installed indoor unit : Check "AA" sign on7-segment.Step 10 Performing the gas leak testLEAK TEST WITH NITROGEN (before opening valves)In order to detect basic refrigerant leaks, beforerecreating the vacuum and recirculating the R-410A, it isthe responsibility of the installer to pressurize the wholesystem with nitrogen (using a cylinder with pressurereducer) at a pressure above 4 MPa (gauge).LEAK TEST WITH R-410A (after opening valves)Before opening valves, discharge all the nitrogen intothe system and create vacuum. After opening valvescheck leaks using a leak detector for refrigerant R-410A.Once you have completed all the connections, check forpossible leaks using leak detector specifically designedfor HFC refrigerants.A(Gas)B(liquid)• The designs and shape are subject to changeaccording to the model.