Carrier EVERGREEN 23XRV - Manual (Page 4)

4
feature also allows the machine to
operate at reduced capacity, rather
than shut down, when key safety limits
are approached.
Chilled liquid reset — Reset can be
accomplished manually or automatical-
ly from the building management sys-
tem. For a given capacity, reset allows
operation at slower compressor
speeds, saving energy when warmer
chilled liquid can be used.
Demand limiting — This feature lim-
its the power draw of the chiller during
peak loading conditions. When incor-
porated into the Carrier Comfort
Network
® building automation system,
a red line command holds chillers at
their present capacity and prevents any
other chillers from starting. If a load
shed signal is received, the compres-
sors are unloaded to avoid demand
charges whenever possible.
Ramp loading — Ramp loading en-
sures smooth pulldown of liquid loop
temperature and prevents a rapid
increase in compressor power con-
sumption during the pulldown period.
Automated controls test — The
test can be executed prior to start-up
to verify that the entire control system
is functioning properly.
365-day real time clock — This
feature allows the operator to program
a yearly schedule for each week, week-
ends, and holidays.
Occupancy schedules — Schedules
can be programmed into the controller
to ensure that the chiller operates
when cooling is required and remains
off when not needed by the tenants or
process.
Extensive service menu — Unau-
thorized access to the service menu can be prevented through password
protection. Built-in diagnostic capabili-
ties assist in troubleshooting and rec-
ommend proper corrective action for
preset alarms, resulting in greater
working time.
Alarm file — This file maintains the
last 25 time-and date-stamped alarm
messages in memory. This function re-
duces troubleshooting time and cost.
Alert file — This file maintains the
last 25 alert messages in memory. This
function provides prognostic informa-
tion and corrective actions that can
avoid unit shutdown.
Configuration data backup —
Non-volatile memory provides
protection during power failures and
eliminates time consuming control
reconfiguration.
Features/Benefits (cont)
23XRV – High Efficiency
Variable Speed Screw Chiller
Cooler Size*
30-32
35-37
40-42
45-47
50-52
55-57
Condenser Size*
30-32
35-37
40-42
45-47
50-52
55-57
Economizer Option
E – With Economizer
N – No Economizer
Voltage Code
3 – 380-3-60
4 – 416-3-60
5 – 460-3-60
9 – 380/415-3-50
S – Special
R – Compressor
Not Used
Drive Amps Amps
Code In†
Out†
AA 440 442
BA 520 442
BB 520 520
Motor Code
P T
Q U
R V
S
CC 608 608
ASME
‘U’ Stamp
AHRI (Air Conditioning, Heating
and Refrigeration Institute)
Performance Certified
Model number nomenclature
*First number denotes frame size.
†Maximum limits only. Additional application
limits apply that may reduce these ampacities.
a23-1648
Quality Assurance
Certified to ISO 9001:2000
S
EISMI
C
OMPLIANT *
* Meets IBC 2006, ASCE-7-05, CBC 2007, and OSHPD seismic requirements.