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Continental Single Phase Chillers
UniPac™
UniPac™Guide Spec
Furnish and install where indicated on plans Qty______
Continental UniPac™ model (USAC, USWC) _________
packaged liquid chiller(s).
The (each) unit shall have a cooling capacity of ______ Tons
with ______ compressor kW when cooling _______GPM of water
from ______°F to _______°F and a cooler fouling factor of 0.00025
Hr. Sq. Ft °F/Btu. The water pressure drop shall not exceed
______ feet of water through the cooler. The USAC entering air
temperature will be _______°F. The USWC unit will be supplied
with ______GPM of _______°F condenser water with a condenser
fouling factor of 0.00025 Hr. Sq. Ft. °F/Btu. The condenser water
pressure drop shall not exceed _______ft of water.
The unit overall dimensions shall not exceed ______ins. In
length. _____ins in width and ______ins. In height. The unit
operating weight shall not exceed ______lbs.
General
Packaged Liquid Chiller shall be completely factory assembled
including all interconnecting refrigerant piping and internal wiring
controls, mounted on a steel frame which accommodates the air
(water) cooled condenser, compressor and cooler.
The units shall
be leak tested, evacuated and shipped with a vapor charge of R-22.
Split chillers shall be field piped, pressure tested, evacuated
and then field charged with R-22.
All units shall include the following:
Compressor Motor
USAC/USWC compressor motor shall be state-of-the-art scroll
with fewer moving parts and sweated without valves. All
compressor(s) shall be mounted on resilient pads to minimize
vibration. Safety internal relief per ASA-B9.1 Code.
Cooler
The cooler shall be direct expansion shell and coil type with
refrigerant in the shell and liquid to be chilled in the tube. The
design working pressure of the cooler shell (liquid) side shall be
150 psig. And 200 psig for the tube (refrigerant) side. The cooler
shall be insulated with ¾” closed cell insulation.
Condenser-Air Cooled
The condenser shall be of copper tube, aluminum fin
construction. Fans shall be propeller-type direct driven by totally
enclosed “air over” motors with built-in overload protection,
positioned within the cabinets for weather protection.
Condenser – Water Cooled
The condenser shall be shell and coil type with water flowing
through seamless copper tubes and refrigerant though the carbon
steel shell
Refrigerant Circuit
Each refrigerant circuit shall be constructed of copper tubing
with brazed joints, and shall include: filter drier, solenoid valve,
sight glass, thermal expansion valve, with external equalizer. The
entire suction line shall be insulated.
Control Center
The control center shall be NEMA-1 type for indoor models and
weatherproof for outdoor models.
All power starting and safety/operating controls shall be mounted
in a fully enclosed control panel with access door
Power controls shall include:
• Single point electrical terminal block
• Compressor-motor contactor(s)
• Compressor run capacitor(s)
• Fan motor contactor(s) (air cooled units only)
• Control circuit fuse
• Control circuit terminal block
Safety/Operating controls shall include:
• Two position switch indicating off/system on – per circuit
• High Pressure control with manual reset –per circuit
• Low pressure control with auto reset – per circuit
• Adjustable chilled water temperature controller
• Adjustable freezestat
• Adjustable compressor anti-recycle timer(s)
• Relay(s)
• Built-in compressor-motor overload
Available Factory Supplied Accessories
Control Transformer Factory mounted transformer converts unit
power to control voltage for single point electrical (115, 240 or 24 volt).
Flow Switch Factory mounted and wired to the control panel.
Chilled Water Pump Package Factory mounted and wired chilled
water pump with starter in the control panel and interlocked with flow
switch.
MicroProcessor Controls State-of-the-art microprocessor.
Operating Gauges Suction and discharge gauges factory installed
and piped to each compressor.
Indicating Lights are wired and mounted on control panel. Lights
furnished for Power On, High Pressure and No Flow/Freeze.
Vibration Isolators Level adjusting spring type 1” deflection or
Neoprene pads, shipped loose.
Low Ambient Accessory (Air Cooled Models Only) Standard unit will
operate down to 45°F. Unit will operate down to 0°F with this factory-
mounted accessory of fan speed control, or add low ambient to –20°F.
Non-Fused Disconnect Switch Factory mounted and wired to control
panel. NEMA 3R for air cooled, NEMA 1 for water cooled.
Blygold Coated Condenser Copper tube/aluminum fin or copper
tube/copper fin coated with Blygold.
Heresite Coated Condenser phenolic corrosion resistant coating for
copper tube and aluminum fin coil or copper/copper coil.
Copper Fin Condenser Coil Copper fin condenser coils.
Sound Attenuator consists of sound absorbing material that
surrounds compressor. Factory installed.
Dual Unit Kit allows operation of two or more units with parallel or
series water circuit. Field mounted.
Alarm Bell Contacts allows alarm bell connection to pressure controls
for signaling if unit fails on manual reset controls.
Water Flange Kit Factory or field mounted consists of 150 lb raised
flanges to convert to flanged cooler connections.
High Return Water Thermostat Factory mounted thermostat senses
high return water temperature at start-up. Allows unit to run un-loaded
instead of shutting down due to high head pressure.
Desuperheaters Provides “free hot water” by recovering heat from
superheated gas.
Compressor Cycle Counter/Hour Meters Cycle counter and hour
meter.
Remote Display Panel allows operator to monitor and control chiller
operation from a remote location.
Continental Chillers LLC Phone: 317-337-9813
PO Box 781555 – Indianapolis, IN 46278 USA Fax: 317-337-9816
www.continentalchillers.com Email: sales@continentalchillers.com