990-4618A-001 InRow™ Chilled Water Air Conditioners Technical Specifications 55
C. AUTOMATIC TRANSFER SWITCH
1. The unit shall be equipped with an automatic transfer switch (ATS). The ATS shall automatically
switch from a main power supply to a secondary power supply in the event of a power outage
without change in equipment operation. The ATS shall monitor the main power supply so that
when the power is restored to the primary source it will automatically switch from the secondary
source back to the main power source.
D. MAIN DISCONNECT SWITCH (ACRC500/ACRP500 series only)
1. Unit shall be provided with Thermal-Magnetic circuit breakers with interrupt capacity ratings per
UL489/CSA C22.2/IEC-947.
a. Voltage: 200-240V 50/60Hz /kAIC 50
b. Voltage: 380-415V 50Hz /kAIC 36
c. Voltage: 460-480V 60Hz /kAIC 22
2. Chilled Water: Units shall include main disconnect switches located on the E-panel in order to
individually disconnect primary/secondary power inputs.
E. DUAL POWER SUPPLIES (ACRC100 SERIES)
1. Power Supplies: The unit shall include two power supplies, each capable of running the unit at
70% capacity in the event of a single power supply failure. Unit power consumption is not to
exceed 1100 watts during normal operation.
2. Operation and Service: Power supply shall be user replaceable.
F. PRIMARY/SECONDARY POWER INPUT
1. Input Power Feeds: Primary/Secondary power inputs should be a locking NEMA or IEC plug or
hardwired connection suitable for the input power selected. Each power input shall be capable of
running the unit at 100% capacity in the event of a main power failure.
G. MICROPROCESSOR CONTROLLER
1. Monitoring and Configuration: The master display shall allow monitoring and configuration of the
air conditioning unit through a menu-based control. Functions include status reporting, set-up, and
temperature set points. Four LEDs report the operational status of the connected air conditioning
unit.
2. Controls: The microprocessor controller shall come equipped with control keys to allow the user to
navigate between menus, select items, and input alpha numeric information.
3. Alarms: The microprocessor controller shall activate a visible and audible alarm in the occurrence
of the following events:
a. Cooling Failure
b. Rack inlet high temperature
c. Rack inlet temperature sensor fault
d. Air filter clogged
e. Air filter run hours exceeded
f. Filter DP sensor failure
g. Supply air sensor fault
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