Carrier 19 Series - Manual (Page 9)

Convenience options offered for added
energy-efficient, ‘tailor-made’ systems
Safety indicator panel
This accessory provides the operator
with an instant trouble-shooting capa­
bility. Seven panel lights monitor high
motor or bearing temperature, low
refrigerant temperature, high con­
denser pressure, starter (overloads and
protective devices), low water flow
(chilled or condenser), low oil pressure,
low chilled water temperature. When
safety is tripped, the light goes on. Panel
does not affect the integrity of the
central control system, is easily con­
nected to the machine without disturb­
ing factory wiring. In addition, a remote
sound or light alarm can be easily field
installed to alert you, should a safety
light be tripped on the indicator panel.
Only a simple two-wire hook-up is
required.
Pneumatic capacity control
Complete pneumatic control systems
are available, if desired, for the centri­
fugals in the 100 to 2000 ton (352-
7034 kW) sizes.
Remote control set point
Select or alter machine chilled water
temperature from a remote location by
specifying this optional solid state
control.
Lead-lag control
Desirable when two or more machines
are installed in series or parallel. Cen­
tralized control features the following
capabilities;
• parallel operation
• series operation with split or common
point control
• two or more chiller operations
• uneven sized chillers working
together
• independent control of chillers both
manually and automatically
• automatic lead-lag operation
• reassignment of lead-lag hierarchy
• automatic standby
Panel lights indicate system operating
mode.
Selective insulation
The 19 Series machines are adequately
insulated at the factory to meet most
application demands. However, addi­
tional insulation packages are available
for specific machine applications.
Isolation assembly
A combination of soleplates, jacking
screws, leveling pads and neoprene
pads are available in isolation packages.
Specify this option for installations
requiring special mounting. Isolation
pads are shipped at no charge.
Hot gas bypass
When a machine is expected to run at
light load and elevated condensing tem­
peratures or at minimum load for ex­
tended periods of time, a hot gas bypass
is recommended. The hot gas bypass is
factory mounted and wired, manual or
automatic. It virtually eliminates com­
pressor surging at extreme part-load
conditions and smooths out the ma­
chine’s full operating cycle, whatever
the load fluctuation.
Pumpout unit
Factory mounted, complete with
starter, controls and all necessary inter­
connecting refrigerant piping. Permits
easy transfer of refrigerant between
machine and storage tank. Speeds
servicing and minimizes downtime. On
multiple machine applications, a single
pumpout unit saves first costs. Not
required for R-ll units.