CeilAir CW series Manual del operador descargar pdf (Pagina 19)

(©July, 2008)

CeilAiR OHS Series Installation, Operation & Maintenance Manual

ir Technology Systems, Inc.

2-8

Vertical runs are based on a total rise of 30 equivalent

feet. For longer rises, individual calculations should be

made. Sizes assume the use of single risers; double

rises may be necessary.

NOTE

Consult the Copeland applications data guide

for more detailed information regarding refriger-

ant line traps and line sizing.

2.6.1.2.2 Remote Air Cooled Condensing Units

(AHU Models)

When installing remote condensing units above the

evaporator, the suction line should be p-trapped at the

evaporator.

NOTE

Do not exceed 15 feet of vertical distance when

installing the condensing unit below the evapo-

rator.

When installing remote condensing units below the

evaporator, the suction line should be trapped with an

inverted trap the height of the evaporator coil. This

prevents migration of liquid refrigerant to the compres-

sor during off cycles.

All suction lines must be insulated to prevent conden-

sation from forming on the pipes. Refer to provided

pipe size charts for recommended pipe sizing.

2.6.2 Chilled Water, Water/Glycol and Hot

Water Reheat Piping

The piping connections for water/glycol, chilled water

and systems with hot water reheat are sweat connec-

tions. Pipe sizes may not necessarily be the same as

the unit connection. Piping should be sized to match

the system pressure drop and pump capacity (if

applicable) and may require reducing fittings to match

the connection size on the air conditioner. The recom-

mended ethylene glycol solution ratio is 40% glycol to

60% water. (SATS recommends Dowtherm SR1

manufactured by Dow Chemical Co.) Glycol-cooled

systems with a low entering fluid temperature and all

chilled water systems should have insulated piping.

WARNING

Glycol is hazardous and the manufacturer’s

MSDS should be consulted.

CAUTION

When installing and filling the water/glycol,

chilled water and optional hot water reheat

loop, all air must be bled from the piping

system.

CAUTION

The piping system must be flushed prior to op-

erating the system. Failure to do so will result

in equipment problems.

A strainer should be included in the water/glycol,

chilled water and optional hot water reheat line. Once

the system is operational, the fluid runs through the

strainer where any foreign objects are removed. The

strainer screen should be cleaned periodically.

H = Horizontal Run V = Vertical Run

RECOMMENDED SUCTION LINE SIZES

Model No. /

*Equivalent Length Ft.

Total Unit Capacity

50’or less 100’or less

H V H V

012 / 12,000 5/8 5/8 5/8 5/8

018 / 18,000 7/8 7/8 7/8 7/8

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

032 / 32,000 7/8 7/8 1-1/8 7/8

040 / 40,000 7/8 7/8 1-1/8 1-1/8

048 / 48,000 1-1/8 1-1/8 1-1/8 1-1/8

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

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

072D / 72,000 7/8 7/8 1-1/8 7/8

084D / 84,000 1-1/8 1-1/8 1-1/8 1-1/8

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

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 59 60

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CeilAir CW series Manual del operador Pagina 19

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