CeilAir CW series Instrukcja Operatora Pobierz pdf (Strona 18)

(©July, 2008)

CeilAiR OHS Series Installation, Operation & Maintenance Manual

ir Technology Systems, Inc.

2-7

Clear all pipe connections of debris and prep connec-

tions for soldering. Use only “L” or “K” grade refrigerant

copper piping. Be careful not to allow solder/piping

debris to get inside refrigerant lines. Silver solder

containing a minimum of 15% silver is recommended.

Dry nitrogen should be flowing through the tubing while

soldering at a rate of not less than 1-2 CFM (0.028-

0.57 M

/minute).

Refrigerant lines for split systems must be sized

according to the piping distance between the evapora-

tor and the condenser/condensing unit. Each valve,

fitting and bend in the refrigerant line must be consid-

ered in this calculation. Refer to the chart provided for

standard equivalent lengths, in feet, of straight pipe.

Oil traps must be included every 20 feet in the vertical

risers and the refrigerant lines must be sloped ¼ inch

for every 10 feet in the horizontal lines to ensure proper

oil return to the compressor. An inverted trap is

required on the discharge line of the remote condenser

to help prevent oil and liquid from flooding back to the

compressor.

NOTE

In the following 3 tables, the line sizes represent

the correct size for individual refrigeration circuits.

Dual circuit units, (Models 048D to 120D), have

two separate pairs of refrigeration lines. One per

compressor.

RECOMMENDED DISCHARGE LINE SIZES

Model No. / *

Equivalent Length Ft.

Total Unit Capacity

50’or less 100’or less 150’or less

012 / 12,000 1/2 1/2 5/8

018 / 18,000 5/8 5/8 5/8

024 / 24,000 5/8 7/8 7/8

032 / 32,000 5/8 7/8 7/8

040 / 40,000 7/8 7/8 7/8

048 / 48,000 7/8 7/8 7/8

048D / 48,000 5/8 7/8 7/8

060 / 60,000 7/8 1-1/8 1-1/8

072D / 72,000 7/8 7/8 7/8

084D / 84,000 7/8 7/8 7/8

120D / 120,000 7/8 1-1/8 1-1/8

*Equivalent Ft. accounts for the linear pipe length as well as

equivalent length of Valves, Elbows & Tee’s as shown in the

previous chart.

EQUIVALENT LENGTH (FT.) OF STRAIGHT PIPE

OD (In.) Globe Angle 90° 45° Tee Tee

Line Size Valve Valve Elbow Elbow Line Branch

1/2 9.0 5.0 0.9 0.4 0.6 2.0

5/8 12 6.0 1.0 0.5 0.8 2.5

7/8 15 8.0 1.5 0.7 1.0 3.5

1 1/8 22 12 1.8 0.9 1.5 4.5

1 3/8 28 15 2.4 1.2 1.8 6.0

CAUTION

Do not exceed the maximum Liquid Line lengths

for the system configurations listed below:

RCU with Hot Gas Bypass ......... 50 Ft

Remote Condensing Unit ........... 100 Ft

Remote Air Cooled Condenser ... 150 Ft

RECOMMENDED LIQUID LINE SIZES

Condenser to A/C Unit /

Model No. / Receiver to Evap. (*Equivalent Ft.)

Total Unit Capacity 50’or less 100’or less 150’or less

012 / 12,000 3/8 3/8 3/8

018 / 18,000 3/8 3/8 1/2

024 / 24,000 3/8 1/2 1/2

032 / 32,000 1/2 1/2 1/2

040 / 40,000 1/2 5/8 5/8

048 / 48,000 1/2 5/8 5/8

048D / 48,000 3/8 1/2 1/2

060 / 60,000 1/2 5/8 5/8

072D / 72,000 1/2 1/2 1/2

084D / 84,000 1/2 5/8 5/8

120D / 120,000 1/2 5/8 5/8

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 59 60

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