32 APC NetworkAIR AFX Series: Guide Specifications
clearly defined prompts shall allow the operator to easily move about the
program and monitor the following functions and alarm conditions.
•Statu s: 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.
•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. Alar m
annunciation shall include: loss of air, clogged filter, high head pressure,
low suction pressure, high temperature, low temperature, high humidity,
low humidity. The temperature and humidity alarm setpoints are user
adjustable.
•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.
•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 Ce lsius 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.
•Run time: The major components within the unit (motor, humidifier
and compressor) 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.
•Security: The microprocessor shall have multiple security levels to
prevent unauthorized adjustment of important system parameters. A
user-selectable 4-digit password shall allow setpoint and configuration
changes.
Cabinet and frame. The cabinet and frame shall be constructed from
welded structural steel. Access panels shall be flush with the frame and
insulated with fiberglass 1" (25 mm) in thickness, 1.5lb/ft3 (0.7kg/m3) in
density.
The panels are powder coated and lift off for access to the unit. A piping and
electrical access plate shall be provided in the bottom of the unit. All units
require front and left side access, 24" (610 mm) minimum.
Blower system. The unit shall be configured for draw-through air pattern, to
provide uniform air-flow over the entire face of the coil. The blower shall be