McQuay M4LC Especificaciones descargar pdf (Pagina 14)

Installation clearance

• Outdoor units must be installed such that there is no short circuit of the hot discharge air or obstruction to

smooth air flow. Select the coolest possible place where intake air should not be hotter than the outside

temperature (max. 45°C)

Minimum Distance A B C D

Series I 150 mm 1,000 mm 150 mm 500 mm

Series II 300 mm 1,000 mm 300 mm 500 mm

(3) Refrigerant piping

Must install a molecular-sieve type filter dryer along the liquid line.

Maximum pipe length and maximum number of bends

• When the pipe length becomes too long, both the capacity and reliability drop. As the number of bends

increases, system piping resistance to the refrigerant flow increases. This will lower the cooling capacity

and as a result, the compressor may become defective. Always choose the shortest path and follow the

recommendation as tabulated below :

MODELS

DATA

10 15 20 25 30 40 50

Max. Length (m) 7 10 15 15 20 20 20

Max. Elevation (m) 5 5 8 8 10 10 10

Max. No of Bends 10 10 10 10 10 10 10

Piping sizes (flare connection type)

• Piping sizes are as follows :

MODELS 10 15 20 25 30 40 50

Liquid (mm/in)

6.35 (1/4) 6.35 (1/4) 6.35 (1/4) 9.52 (3/8) 9.52 (3/8) 9.52 (3/8) 9.52 (3/8)

Suction (mm/in)

9.52 (3/8) 12.70 (1/2) 15.88 (5/8) 15.88 (5/8) 15.88 (5/8) 19.05 (3/4) 19.05 (3/4)

PIPING CONNECTION TO THE UNITS

• Align the centre of the piping and sufficiently tighten the flare nut with fingers.

• Finally, tighten the flare nut with torque wrench until the wrench clicks.

• When tightening the flare nut with torque wrench, ensure the direction for tightening follows the arrow on

the wrench.

PIPE SIZE

(mm/in)

TORQUE (Nm)

6.35 (1/4) 18

9.52 (3/8) 42

12.70 (1/2) 55

15.88 (5/8) 65

19.05 (3/4) 78

Caution

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McQuay M4LC Especificaciones Pagina 14