YVAA Style A Air-Cooled Screw Liquid Chillers ... - Johnson Controls

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SECTION 4 - INSTALLATION TABLE 2 - EVAPORATOR CONNECTIONS DIMENSIONS FRAME COND. EVAP. 28 VICTAULIC CONNECTIONS SIZE NOMINAL DIAMETER FLANGE DIMENSONS (GB ONLY) IN MM* B C D K L d n FORM 201.28-NM1.1 ISSUE DATE: 8/29/2012 015 3 B 6" DN150 170.5 27 280 241.5 22 216 8 2 016 5 B 6" DN150 170.5 27 280 241.5 22 216 8 2 017 8 C 6" DN150 170.5 27 280 241.5 22 216 8 2 018 3 A 6" DN150 170.5 27 280 241.5 22 216 8 2 019 5 A 6" DN150 170.5 27 280 241.5 22 216 8 2 019 8 B 6" DN150 170.5 27 280 241.5 22 216 8 2 020 0 C 6" DN150 170.5 27 280 241.5 22 216 8 2 021 3 A 6" DN150 170.5 27 280 241.5 22 216 8 2 021 5 C 6" DN150 170.5 27 280 241.5 22 216 8 2 021 8 C 6" DN150 170.5 27 280 241.5 22 216 8 2 023 3 B 6" DN150 170.5 27 280 241.5 22 216 8 2 024 5 C 6" DN150 170.5 27 280 241.5 22 216 8 2 024 8 C 6" DN150 170.5 27 280 241.5 22 216 8 2 026 3 B 6" DN150 170.5 27 280 241.5 22 216 8 2 027 3 D 6" DN150 170.5 27 280 241.5 22 216 8 2 027 5 E 8" DN200 221.5 27 345 298.5 22 270 8 2 027 8 E 8" DN200 221.5 27 345 298.5 22 270 8 2 029 5 E 8" DN200 221.5 27 345 298.5 22 270 8 2 030 3 C 6" DN150 170.5 27 280 241.5 22 216 8 2 030 5 C 6" DN150 170.5 27 280 241.5 22 216 8 2 030 8 E 8" DN200 221.5 27 345 298.5 22 270 8 2 031 8 E 8" DN200 221.5 27 345 298.5 22 270 8 2 032 3 E 8" DN200 221.5 27 345 298.5 22 270 8 2 033 3 C 6" DN150 170.5 27 280 241.5 22 216 8 2 034 3 E 8" DN200 221.5 27 345 298.5 22 270 8 2 034 5 E 8" DN200 221.5 27 345 298.5 22 270 8 2 050 0 J 8" DN200 221.5 27 345 298.5 22 270 8 2 052 3 J 8" DN200 221.5 27 345 298.5 22 270 8 2 * Reference Figure 34 for flange dimensions. B n-L K D d B n-L K D d C C 4" / 6" / 8" FLANGE 10" FLANGE FIGURE 11 - FLANGE FOR GB VESSELS LD16185a QUAN- TITY JOHNSON CONTROLS
FORM 201.28-NM1.1 ISSUE DATE: 8/29/2012 Option Flanges One of two types of flanges may be fitted depending on the customer or local pressure vessel code requirements. These are Victaulic-Adapter flanges, normally supplied loose, or weld flanges, which may be supplied loose or ready-fitted. Victaulic-Adapter and weld flange dimensions are to ISO 7005 - NP10. WELD FLANGE VICTAULIC ADAPTER FIGURE 12 - FLANGE ATTACHMENT REFRIGERANT RELIEF VALVE PIPING LD10495 The evaporator is protected against internal refrigerant overpressure by refrigerant relief valves. A pressure relief valve is mounted on each of the main refrigerant lines connecting the evaporator to the compressors. A piece of pipe is fitted to each valve and directed so that when the valve is activated the release of high pressure gas and liquid cannot be a danger or cause injury. For indoor installations (not recommended), pressure relief valves should be piped to the exterior of the building. The size of any piping attached to a relief valve must be of sufficient diameter so as not to cause resistance to the operation of the valve. Unless otherwise specified by local regulations. Internal diameter depends on the length of pipe required and is given by the following formula: D 5 = 1.447 x L • Where: • D = minimum pipe internal diameter in cm • L = length of pipe in meters SECTION 4 - INSTALLATION If relief piping is common to more than one valve, its cross-sectional area must be at least the total required by each valve. Valve types should not be mixed on a common pipe. Precautions should be taken to ensure the outlets of relief valves or relief valve vent pipes remain clear of obstructions at all times. ELECTRICAL CONNECTION The following connection recommendations are intended to ensure safe and satisfactory operation of the unit. Failure to follow these recommendations could cause harm to persons or damage the unit, and may invalidate the warranty. POWER WIRING No additional controls (relays, etc.) should be mounted in the control panel. Power and control wiring not connected to the control panel should not be run through the control panel. If these precautions are not followed it could lead to a risk of electrocution. In addition, electrical noise could cause malfunctions or damage the unit and its controls. After power wiring connection, do not switch on mains power to the unit. Some internal components are live when the mains are switched on and this must only be done by “Authorized” persons familiar with starting, operating, and troubleshooting this type of equipment. All electrical wiring should be carried out in accordance with local regulations. Route properly sized cables to cable entries on the unit. In accordance with local codes, NEC codes, U.L. and C.E. standards, it is the responsibility of the user to install over current protection devices between the supply conductors and the power supply terminals on the unit. To ensure that no eddy currents are set up in the power panel, the cables forming the 3-phase power supply must enter via the same cable entry. All sources of supply to the unit must be taken via a common point of isolation (not supplied by <strong>Johnson</strong> <strong>Controls</strong>). JOHNSON CONTROLS 29 4
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YVAA Style A Air-Cooled Screw Liquid Chillers ... - Johnson Controls

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