Installation Operation Maintenance

InstallationGas pipework installationThe installation must conform to allstandards and regulations.The gas supply pipework and gasstop valve to be installed near theunit must be sized so as to ensurethe gas pressure is sufficient at theunit inlet when operating at fullload.CAUTION! Should the pressure atthe unit valve gas inlet be higherthan 0.035 bar, an expansion valvemust be installed.The pipework must be selfsupportingand the final connectionto the burner must be made by aflexible pipe. Provide a dustprotection (filter) upstream the unitconnection.CAUTION! The gas pipework mustnot exert any stress on the burnergas connection.Note: Expansion valve must beadapted to the type of gas used:• G 20: 20 mb• G 25: 25 mb• G 31 (Propane): 37 or 50 mbTable 6 - Gas burner modelsUnitYSD/YSH 060YSD/YSH 072YSD/YSH 090YSD/YSH 102YSD/YSH 120Burner sizeG120G200G200G250G250See Table 51 for burnerperformance.Figure 12 - Typical gas supply pipeworkGas leak check procedure1. Vent the gas line2. Gas supply line pressure test:close valve 4 and open valve 23. Leak-check the gas pipe.Look for gas pipe leaks using"Typol", "1000 bulles" or a similarproduct. Do not use soapy water.WARNING! Never use an openflame to check for gas leaks.Required gas pressure at the unitinlet connection are given inTable 50.Note: To operate with propane gas,the burner is fitted with a pressurelimiter (supplied by Trane)1 = Evaporator section2 = Gas burner section3 = Condenser section4 = Gas supply connection5 = Gas supply line6, 8 = Gas stop valve (Field supplied)7 = Expansion valve (Field supplied)9 = Filter (Field supplied)RT-SVX20B-E413