Installation Operation Maintenance

InstallationPressure relief valve - CCUNAbove the maximum systemrefrigerant charge, it isrecommended to install a pressurerelief valve. See Figure 12 forinstallation. Depending upon theliquid line diameter selected inTable 12, find the predictedmaximum liquid line length ofinstallation without pressure reliefvalve installed. The recommendedpressure relief valve setting is21 Bar and shall be installed on thelow pressure side of the refrigerantcircuit.Table 13 - Recommended liquid line diameters with pressure relief valve - CCUNUnit size205206207208209210211UnitefficiencymodelMaximumsystemrefrigerantchargewithoutpressurerelief valve(kg)Liquid linediameterMaximumlengthwithoutpressurerelief valve(m)Liquid linediameterMaximumlengthwithoutpressurerelief valve(m)Standard 48 1"1/8 51 7/8" 80High 53 1" 1/8 60 7/8" 94Standard 54 1" 1/8 56 7/8" 88High 59 1" 1/8 65 7/8" 103Standard 61 1"3/8 40 1"1/8 63High 67 1"3/8 47 1"1/8 73Standard 68 1"3/8 44 1"1/8 68High 72 1"3/8 48 1"1/8 75Standard 75 1"3/8 49 1"1/8 49High 82 1"3/8 56 1"1/8 56Standard 75 1" 5/8 31 1"3/8 44High 80 1" 5/8 35 1"3/8 49Standard 74 1" 5/8 27 1"3/8 38High 77 1" 5/8 30 1"3/8 42Figure 12 - Installing pressure relief valve1 = Connection for pressure relief valve circuit 12 = Connection for pressure relief valve circuit 224CG-SVX06A-E4