APC INROOM ACPSC3000 Instrucciones de operaciones descargar pdf (Pagina 37)

InRoom CW/DX – Operating Instructions

Kupferrohr Bogen Winkel T- Stück

Außen - Ø mm) 45° 90° 180° 90°

10 (3/8) 0,16 0,20 0,53 0,32 0,20

12 (1/2) 0,21 0,27 0,70 0,42 0,27

15 (5/8) 0,24 0,30 0,76 0,48 0,30

18 (3/4) 0,26 0,36 0,87 0,54 0,36

22 (7/8) 0,27 0,42 0,98 0,61 0,42

28 (1 1/8) 0,39 0,51 1,20 0,79 0,51

35 (1 3/8) 0,51 0,70 1,70 1,00 0,70

42 (1 5/8) 0,64 0,80 1,90 1,20 0,80

6.3.2.1 Selection of pressure and liquid line

- Establish the shortest route for pipework from the unit to the condenser. Make exceptions only tp

avoid unnecessary bends.

- Determine the required pipe ﬁ ttings or specials between the unit and condenser.

- With the aid of table No. 1 on the bottom of this page, convert the pressure loss of the individual

ﬁ t tings into equivalent pipe lengths, look up equivalent pipe lengths for pipe specials and ﬁ ttings

and add these to the real pipe lengths.

- Select the pipe dimensions from diagram No. 1 on the following page corresponding to the calcu-

lated overall pipe length and refrigeration output.

Precautions for pressure line, if the condenser is higher than the unit.

- To ensure oil return in ascending hot gas lines, particularly at part load, the minimum refrigeration

capacity must not fall below the value stated on table 2 of the following page, for the corresponding

pipe size.

- For a refrigerant line set over 200 feet, contact factory for additional oil needed.

- Oil traps (even when an oil separator is installed) are to be installed every 5-6 m (16-20 ft) (sketch

3, page 40).

- The horizontal lines must always be routed with a slope towards the condenser.

Recommendation for liquid lines:

With liquid refrigerant, bubbles can form upstream of the expansion valve. This is always the case when

the ambient temperature is higher than the temperature of the liquid line (approx. +30°C (+86°F)) upstream

of the expansion valve. In this case insulation with Armaﬂ ex or equivalent material with a wall thickness of

9 mm (0.4 in) is recommended for lines outside the unit. A thicker insulation is not required as the insulating

effect increases only insigniﬁ cantly as the wall thickness increases.

Precautions for pressure lines:

Warning:

Pressure lines can reach a temperature of up to +80°C (+176°F) and should be insulated

inside the building at places where a possibility of contact exists.

Caution:

All work on refrigeration systems may only be carried out by qualiﬁ ed APC approved per-

sonnel or by the customer service

Table 1: Pressure drop of pipe ﬁ ttings or specials in meters for equivalent pipe length

Copper pipe Bend Angle T- piece

outside Ø

mm (in)

45° 90° 180° 90°

6.3.2 Refrigerant Piping

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 79 80

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APC INROOM ACPSC3000 Instrucciones de operaciones Pagina 37

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