Remote Air Cooled Condensers - Trane CyberRow DX Installation, Operation And Maintenance Manual

Row-based precision air conditioners

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Table of Contents

Installation

Figure 11. DX Refrigerant piping connections

DISCHARGE

LINE

Refrigerant Pipe Sizing

Refrigerant lines for split systems must be sized according to

the piping distance between the evaporator and the

condenser. Each valve, fitting and bend in the refrigerant line

must be considered in this calculation. Pipe sizes are given for

equivalent feet, not linear feet. Do not confuse the

terminologies.

For example, a 7/8 inch standard 90° elbow has an equivalent

length of 1.5 feet; a 7/8 inch branch Tee has an equivalent

length of 3.5 feet. These corrections must be accounted for

when sizing your piping.

Note:

•

Refrigerant piping between the CyberRow unit and the

remote condenser must not exceed 150 feet (total

equivalent length). The maximum level drop from the

CyberRow unit to the condenser must not exceed 20

feet.

•

Consult ASHRAE standards and refer to the Copeland

applications data guide for more detailed information

regarding refrigerant line traps and line sizing.

Refer to

Table 4

for standard equivalent lengths, in feet, of

straight pipe.

LIQUID

LINE

TOP ACCESS PIPING

CONDENSATE PUMP

DISCHARGE- 1/2" FPT

SUCTION LINE

BOTTOM ACCESS PIPING

Table 4.

Equivalent length (ft.) of straight pipe

OD (In.)

Globe

Line Size

Valve

1/2

9.0

5/8

7/8

1 1/8

1 3/8

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.