Daikin R32 Split Series Installer's Reference Manual

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Daikin R32 Split Series Installer's Reference Manual Manual pdf 15 page image

6 InstallationInstaller reference guide152(A)MXM40+50M(3)(4)V1B(9)_2(A)MXF40+50A2V1BR32 Split series4P600463-2 – 2019.10Port Class ReducerA 25, 35 —B 25, 35 —2MXF40A 20, 25, 35 —B 20, 25, 35 —2MXM50, 2AMXM50A 15, 20, 25, 35, 42(a) —B 15, 20, 25, 35 1+242, 50 —2AMXF50A 25, 35 —B 25, 35 1+22MXF50A 20, 25, 35 —B 20, 25, 35 1+2(a) Use optional accessory.Reducer type Connection1 Ø12.7 mm → Ø9.5 mm2 Ø12.7 mm → Ø9.5 mmConnection example:▪ Connecting a Ø9.5 mm pipe to a Ø12.7 mm gas pipe connectionporta b d eca Outdoor unit connection portb Reducer type 1c Reducer type 2d Flare nut for Ø12.7 mme Inter-unit pipingCoat the threaded connection port of the outdoor unit where the flarenut comes in with refrigeration oil.NOTICEUse an appropriate wrench to avoid damaging theconnection thread by overtightening the flare nut. Becareful NOT to overtighten the nut, or the smaller pipe maybe damaged (about 2/3-1× the normal torque).6.4.7 Using the stop valve and service portTo handle the stop valveTake the following guidelines into account:▪ The stop valves are factory closed.▪ The following figure shows the stop valve parts required whenhandling the valve.cdaba Service port and service port capb Valve stemc Field piping connectiond Stem cap▪ Keep both stop valves open during operation.▪ Do NOT apply excessive force to the valve stem. Doing so maybreak the valve body.▪ ALWAYS make sure to secure the stop valve with a spanner, thenloosen or tighten the flare nut with a torque wrench. Do NOT placethe spanner on the stem cap, as this could cause a refrigerantleak.aba Spannerb Torque wrench▪ When it is expected that the operating pressure will be low (e.g.when cooling will be performed while the outside air temperatureis low), sufficiently seal the flare nut in the stop valve on the gasline with silicon sealant to prevent freezing.Silicon sealant; make sure there is no gap.To open/close the stop valve1 Remove the stop valve cover.2 Insert a hexagon wrench (liquid side: 4 mm, gas side: 6 mm)into the valve stem and turn the valve stem:Counterclockwise to open.Clockwise to close.3 When the stop valve CANNOT be turned any further, stopturning.4 Install the stop valve cover.Result: The valve is now open/closed.To handle the stem cap▪ The stem cap is sealed where indicated with the arrow. Do NOTdamage it.▪ After handling the stop valve, tighten the stem cap, and check forrefrigerant leaks.