APC AFX Series Specifications download pdf (Page 10)

6APC NetworkAIR™ AFX

Microprocessor Controller

The microprocessor controller is

standard on the main module of

each system. The controller pro-

vides precision control for the

demanding requirements of:

• Data centers

• Control rooms

•Clean rooms

• Switch rooms

• UPS rooms

The easy-to-use display allows the

operator to select options from the

device’s menu-driven interface to

control and monitor the connected

air conditioning system.

Status

Complete status monitoring is pro-

vided within the status menu of the

microprocessor controller. Avail-

able information includes:

• Current Temperature/Humidity

• Temperature/Humidity Setpoint

• Cooling/Heating Status

• Humidification/Dehumidification

Status

Alarms

Quick access to any alarm condition

is facilitated through the menu

structure. The alarm key acts as a

hot key providing immediate access

to the alarm display menu. Presence

of a new alarm will sound the audi-

ble alarm. The red alarm LED on

the display panel will remain illu-

minated until all alarms have been

cleared. The temperature and

humidity alarm setpoints are adjust-

able. Alarm annunciations include:

• Loss of airflow

• Clogged filter

• High head pressure

• Low suction pressure

• High/Low temperature

• High/Low humidity

Automatic setpoint crossover pro-

tection will prevent the setting of

the heat setpoint above the cool set-

point and the humidification

setpoint above the dehumidification

setpoint. Setpoint adjustment can be

restricted to only operators with

knowledge of the security codes set

within the security menu structure.

Configuration

Flexibility is offered through he use

of the configuration menu. Operat-

ing requirements are satisfied by

changing the configuration set-

tings. New configurations are

stored in EEPROM and protected

from unauthorized tampering by the

four-digit security password,

selected in the security menu. Con-

figuration options include:

• Fahrenheit or celsius display

• Compressor minimum on/off time

• Power loss restart time delay

• Redundant unit grouping

• Alarm input polarity

• Alarm enable

• Temperature/Humidity deadbands

• Small room delay

Common Alarm Contact

A common alarm relay is installed

on every microprocessor. In the

event of an alarm condition, the

relay will change state. The user

can select which alarms change the

state of the relay. This feature

allows for remote enunciation of

alarm status.

Run Times

The major components within the

unit have independent run timers

that monitor and store accumulated

run hours on the components. The

run timers are provided with opera-

tor adjustable run time alarms.

Security

Multiple security levels prevent

unauthorized adjustment of impor-

tant system parameters. The user

may select a four-digit password for

setpoint and configuration changes.

Should the password be forgotten,

APC can provide temporary access.

Monitoring

With the addition of a supervisory

network communications card the

microprocessor may interface with

the locally installed APC remote

monitoring and control system.

Gateways are available for interfac-

ing with building management

systems. Please check with APC for

compatibility with your building

management system.

Cool Inhibit

Prevents the unit from over-cooling

during the dehumidification cycle.

If the space temperature falls below

a user adjustable setpoint, cooling

will become inhibited until the

space temperature returns to

setpoint.

Cool Override

A manual toggle switch will allow

the compressor to operate in the

event of a microprocessor failure.

The cool override can be field wired

to a snap acting thermostat for cool-

ing control.

Remote Shutdown

Events external to the unit, such as

activation of a fire suppression sys-

tem may require the unit to shut

down remotely. Additionally this

feature may be tied into a BMS that

would allow remote control of the

units on/off status.

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APC AFX Series Specifications Page 10

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