APC AFX Series Specifications download pdf (Page 10)

9

Installation (continued)

Drycooler and Pump Package Connection

Provide sufficient valves and unions to isolate

the dry cooler and pump package during routine

service or in the event of an emergency.

Pipe should be welded wherever possible to

minimize leak possibility.

Pipe and wire the dry cooler/precool system in

accordance with local and national codes. A

wiring diagram is attached to the inside of each

control panel cover. The control enclosures are

weather protected and should be mounted close

to the header end of the drycooler. All

thermostats should be checked for the proper

set point per the wiring diagram. Any remote

bulb thermostats should be mounted at this time.

The pump package is weather-protected and

has been factory wired with branch fusing and

pump motor overloads. Consult the nameplate

for electrical information on the pump package

for disconnect sizing. Your pump size may have

been increased or decreased from the standard

pump package due to pressure drop

requirements.

The pump package should be mounted as close

as possible to the drycooler and the glycol

solution should flow from the drycooler to the

pump package.

The expansion tank with airtrol fitting must be

mounted at the highest point in the piping

system. A fill hose bib should also be provided

to facilitate filling the system.

Installation of an air separator will enhance the

ability to remove the air during start-up.

Air Cooled Condenser Installation

All refrigerant piping should comply with

ASHRAE, local and national codes. Use only

refrigerant grade pipe, and pipe joints should be

high temperature brazed.

The discharge line should loop above the hot

gas header at the condenser.

The risers must be properly sized to ensure oil

return.

Discharge lines should be sized to maintain

sufficient return oil to the compressor by

maintaining high gas velocity while keeping

the refrigerant pressure drop within normal

ranges.

Piping should be adequately supported and

should allow for normal expansion and

contraction.

General Air Distribution

The AFX unit provides full rated air delivery at

0.5 external static pressure. All other AFX units

are rated for 0.3” external static pressure

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