Specifications - Lord and Son Construction, Inc.

2.5.4.1 Operating Controls
Chiller shall be provided with the following adjustable operating controls
as a minimum.
a. Leaving chilled water temperature control
b. Adjustable timer or automated controls to prevent a compressor from
short cycling
c. Automatic lead/lag controls (adjustable) for multi-compressor units
d. Load limiting
e. System capacity control to adjust the unit capacity in accordance
with the system load and the programmable setpoints. Controls
shall automatically re-cycle the chiller on power interruption.
f. Startup and head pressure controls to allow system operation at all
ambient temperatures down to 0 degrees F
2.5.4.2 Monitoring Capabilities
During normal operations, the control system shall be capable of monitoring
and displaying the following operating parameters. Access and operation of
display shall not require opening or removing any panels or doors.
a. Entering and leaving chilled water temperatures
b. Self diagnostic
c. Operation status
d. Operating hours
e. Number of starts
f. Compressor status (on or off)
g. Refrigerant discharge and suction pressures
h. Oil pressure
2.5.4.3 Programmable Setpoints
The control system shall be capable of being reprogrammed directly at the
unit. [No parameters shall be capable of being changed without first
entering a security access code.] The programmable setpoints shall include
the following as a minimum.
a. Leaving Chilled Water Temperature
Section 23 64 10 Page 9