JOHNSON CONTROLS
FORM 201.23-EG1 (1013)
5
glass with moisture-indicator, and electronic expansion
valve.
• Discharge line provided with manual compressor
shutoff service valve (See Options and Accessories for
suction line valve). Suction line equipped with closed-
cell insulation.
• Insulated external oil separators with no moving parts,
450 psig (31 barg) design working pressure, and UL
listing. Refrigerant system differential pressure pro-
vides oil ow through service replaceable, 0.5 micron,
full ow, cartridge type oil lter internal to compressor.
• Oil cooling is provided by a dedicated air-cooled nned-
tube type heat exchanger located in the condenser
section of the machine.
• A ash tank is located in each refrigerant circuit to
increase the system efciency. The design working
pressure is 450 psig (31 barg).
• Suction lines, oil separators and ash tanks are cov-
ered with closed-cell insulation.
EVAPORATOR
• High efciency, direct-expansion type cooler with re-
frigerant in tubes and chilled liquid through the bafed
shell. Independent circuits provided for each compres-
sor.
• Design working pressure of the shell waterside is 150
psig (10.3 barg), and 235 psig (16 barg) for the refrig-
erant side. The evaporator is constructed and tested
IAW applicable sections of ASME Pressure Vessel
Code, Section VIII, Division (1). Water side exempt
per paragraph U-1, ©, (6).
• Removable heads allow access to the internally-
enhanced, seamless, copper tubes. Water vent and
drain connections are also included.
• The evaporator is equipped with a thermostatically
controlled heater for protection to -20°F (-29°C) am-
bient, and shell is covered with 3/4” (19mm), exible,
closed-cell insulation, thermal conductivity of 0.26k
maximum. 1-1/2" (38mm) foam available as an option.
• Water nozzles have grooves for mechanical (ANSI/
AWWA C-606) couplings, and shall be insulated by
Contractor after pipe installation. (See the Accessories
and Options section for ange options.
CONDENSER SECTION
• Condenser fans are dynamically and statically bal-
anced, direct-drive, corrosion resistant glass ber
reinforced composite blades molded into a low noise,
full airfoil cross section, providing vertical air discharge
from extended orices. Guards of heavy gauge, PVC
(polyvinyl chloride) coated.
• Standard and reduced sound level models have
condensers tted with single-speed fans. Low sound
models have two-speed fans tted.
• The fan motors are the high efciency, direct drive, 6
pole on standard sound models and 8 pole on reduced
and low sound models, 3 phase, Class-“F”, current
overload protected, totally enclosed (TEAO) type with
double sealed, permanently lubricated, ball bearings
• Fin and tube condenser coils constructed of seamless,
internally enhanced, high condensing coefcient, cor-
rosion resistant copper tubes arranged in staggered
rows and mechanically bonded to corrosion resistant
alu-minum alloy ns with full height n collars. Design
working pressure is 450 psig (31 barg).
MICROCOMPUTER CONTROL CENTER
• The microcomputer control center provides automatic
control of chiller operation including compressor start/
stop and load/unload, anti-recycle timers, condenser
fans, evaporator pump, evaporator heater, unit alarm
contacts and run signal contacts.
• Chiller automatically resets to normal chiller operation
after power failure.
• Unit operating software is stored in non-volatile
memory. Field programmable set points are retained
in lithium battery backed regulated time clock (RTC)
memory for minimum 5 years.
• Alarm contacts are provided to remote alert contacts
for any unit or system safety fault.
• Display and Keypad:
♦ The display contains an 80 character liquid crystal
display that is both viewable in direct sunlight and
has LED backlighting for nighttime viewing. One
keypad and display panel is provided with every
chiller.
♦ Display and keypad is accessible through display
access door without opening main control/electrical
cabinet doors.
♦ Display provides unit setpoints, status, electrical
data, temperature data, pressures, safety lockouts
and diagnostics without the use of a coded display.
♦ The display provides descriptions in English (or
available language options), numeric data in Eng-
lish (or Metric) units.
♦ Sealed keypad shall include unit On/Off switch.
• Programmable Setpoints (within Manufacturer limits):
display language; leaving chilled liquid temperature:
setpoint, control range; local or remote control; units of
measure; compressor lead/lag; and maximum chilled
water setpoint reset temperature range.
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