Daikin RCS 06F Installation Manual

Daikin RCS 06F Installation Manual Manual pdf 12 page image

12 IM 962-2InstallationInstallation of PipingWARnIngDo not use oxygen to purge lines or pressure system for leaktest. Oxygen reacts violently with oil, which can cause anexplosion resulting in severe personal injury or death.nOTE: The condensing unit is shipped with a holding chargeof dry nitrogen which must be purged from the unitbefore evacuation.Once located, the condensing unit is ready to beinterconnected with the evaporator using ONLY refrigerationgrade dehydrated tubing.The following should be consideredwhen connecting the tubing.1. Pitch vapor line toward the compressor approximately1/2" every 10 feet to facilitate oil return.2. It is recommended that the sight glass, filter drier andliquid line solenoid valve be installed in the liquid linejust prior to the evaporator.3. Silver solder (such as silfos, Easy Flow, etc.) should beused for all refrigerant joints.4. Thoroughly clean all joints before fluxing. DO NOTUSE ACID FLUX.5. When fluxing, limit the application of paste to theminimum and always apply flux to the male portion ofthe connection.6. Vapor lines should be insulated to prevent condensatedrip. Use insulation of at least 3/8" wall thickness. Theinsulation should be installed on the tubing prior tomaking the sweat connections.7. Insulate the liquid line whenever the heat pickup ortransfer can affect the subcooling.8. Care should be taken to avoid transmission of noise orvibration to building structure.Table 8: Refrigerant Piping DataEquivalent Length, ft. [m] of Straight Type “L” Tubingfor nonferrous Valves/Fittings (Brazed)TubeSize,O.D.SolenoidValve AngleValveShortRadiusEllLongRadiusEllTee LineFlowTeeBranchFlow1/2 70 [21 3] 8 3 [2 5] 1 6 [0 5] 1 0 [0 3] 1 0 [0 3] 3 1 [0 9]5/8 72 [21 9] 10 4 [3 2] 1 9 [0 6] 1 2 [0 4] 1 2 [0 4] 3 6 [1 1]3/4 75 [22 9] 12 5 [3 8] 2 1 [0 7] 1 4 [0 4] 1 4 [0 4] 4 2 [1 3]7/8 78 [23 8] 14 6 [4 4] 2 4 [0 7] 1 6 [0 5] 1 6 [0 5] 4 8 [1 5]1-1/8 — 18 8 [5 7] 3 0 [0 9] 2 0 [0 6] 2 0 [0 6] 6 0 [1 8]1-3/8 — 22 9 [7 0] 3 6 [1 1] 2 4 [0 7] 2 4 [0 7] 7 2 [2 2]1-5/8 — 27 1 [8 3] 4 2 [1 3] 2 8 [0 8] 2 8 [0 8] 8 4 [2 6]2-1/8 — 35 4 [10 8] 5 3 [1 6] 3 5 [1 1] 10 7 [3 3] 10 7 [3 3]Typical Piping RecommendationsThe following will be of help in accomplishing a successful1. Size liquid line for no more than 10°F loss whichcorresponds to approximately 3 psig pressure drop.2. Size vapor lines for no more than 2°F loss whichcorresponds to approximately 3 psig pressure drop.3. Install sight glass, filter drier and solenoid valve inliquid line adjacent to evaporator. Filter drier should bebetween the condensing unit and sight glass.4. Pitch all horizontal vapor lines downward in thedirection of flow (1/2" to 10 ft. run).5. When making up refrigerant piping, take everyprecaution to prevent dirt and moisture from enteringthe piping.6. Locate the condensing unit and evaporator(s) as closetogether as possible to minimize piping runs.7. Liquid or vapor lifts not to exceed 60 ft.8. To prevent suction line breakage due to vibration and toprevent tubing noise transmission into the conditionedspace, the suction clamp must be installed after tubingis brazed as illustrated in Figure 10.Figure 10: Suction Clamp