Specifications

Guide Specifications
28 APC NetworkAIR™ AFX
PART 2 — PART 2 PRODUCT
2.01 STANDARD COMPONENTS
A. MICROPROCESSOR
1. The microprocessor controller shall provide total environmental control. The system,
based on the main controller, shall offer up to eight analog inputs, two analog outputs,
twelve digital inputs and thirteen digital outputs. The operator interface shall provide a 4-
line, 80-character backlit LCD display. User-friendly menu structure along with clearly
defined prompts shall allow the operator to easily move about the program and monitor
the following functions and alarm conditions.
a. Status: Complete status monitoring shall be provided within the status menu of the
microprocessor controller, and shall include the following information: current
temperature, current humidity, temperature setpoint, humidity setpoint, cooling status,
heating status, humidification status and dehumidification status.
b. Alarms: Quick access to any alarm condition shall be facilitated through the menu
structure. Presence of a new alarm shall sound an audible alarm. A red alarm LED on
the display panel shall remain illuminated until such time that all alarms have been
cleared. Alarm annunciation shall include: loss of airflow, clogged filter, high head
pressure, low suction pressure, high temperature, low temperature, high humidity, and
low humidity. The temperature and humidity alarm setpoints are user adjustable.
c. Setpoint: The microprocessor controller shall provide independent setpoints for
heating, cooling, humidification, and dehumidification. Automatic setpoint cross-over
protection shall prevent the setting of the heat setpoint above the cool setpoint and the
humidify setpoint above the dehumidify setpoint. Setpoint adjustment shall be capable
of being protected via security code.
d. Configuration: Flexibility shall be offered through the use of the configuration menu.
It shall closely match the operating requirements by changing the configuration
settings. The site configuration shall be stored in the EEPROM and be protected from
unauthorized tampering by the user selectable 4-digit security password in the security
menu. Configuration options shall include: Fahrenheit or Celsius display, compressor
minimum off-time, power-loss restart time-delay, primary-secondary transfer
functions, alarm input polarity, alarm enable, temperature deadbands, humidity
deadbands, and small room delay.
e. Run time: The major components within the unit shall have independent run-timers
that monitor and store the accumulated run-hours on the components. The run timers
shall be provided with operator-adjustable run-time alarms for proper component
maintenance.
f. Security: The microprocessor shall have multiple security levels to prevent
unauthorized adjustment of the important system parameters. A user-selectable 4-digit
password shall allow setpoint and configuration changes.