FORM NO.:6U6K-B01E-NB-EN
JOHNSON CONTROLS
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excellent heat transfer performance with a compact size and
low weight, reducing structural steel requirements on the job
site.
The heat exchanger is manufactured in a precisely controlled
vacuum-brazing process that allows the ller material to form a
brazed joint at every contact point between the plates, creating
complex channels.
The units with two refrigerant systems use dual circuit BPHEs.
Asymmetric channels provide optimal efficiency in the most
compact design. This results in low refrigerant charge or
lower pressure drop on the water or brine side. The asymmetry
guarantees the best performance in both full and partial-load
conditions. The integrated distribution system ensures an even
distribution of the refrigerant throughout the plate package.
The refrigerant side design working pressure of the heat
exchanger is 45 bar and the waterside (piping) design working
pressure is 10 bar.
The Brazed Plate Heat Exchanger is equipped with a heater
controlled by the microprocessor. The heater provides freeze
protection for the cooler down to -20 °C ambient. The cooler
is covered with 1-1/2” (38mm) flexible, closed-cell, foam
insulation.
Installing contractor must include accommodations in the
chilled water piping to allow proper drainage and venting of the
heat exchanger. Water inlet and outlet connections are grooved
for compatibility with factory supplied victaulic connections.
A strainer with a mesh size between 0.8 and 1.0 mm (20 mesh)
is recommended upstream of the heat exchanger to prevent
clogging.
A factory-wired flow switch is standard, installed in a pipe
section at the outlet of the evaporator.
Condenser
Coils – Fin and tube condenser coils of seamless, internally-
enhanced, high-condensing-coefficient, corrosion resistant
copper tubes are arranged in staggered rows, mechanically
expanded into hydrophilic aluminum ns. The design working
pressure of the coil is 45 bar (650 PSIG).
Fans – The condenser fans are composed of corrosion resistant
aluminum blades sprayed with PP plastic and galvanized sheet
steel fan housing coated with black plastic. They are designed
for maximum efficiency with integrated variable speed drive.
They are directly driven by independent EC motors, and
positioned for vertical air discharge. All blades are statically
and dynamically balanced for vibration-free operation. The fan
grilles are constructed of heavy-gauge, rust-resistant, coated
steel.
EC Motors – The fans are directly driven by EC (Electrical
Commutation) motors. Thermal loading protection and line
under-voltage, phase failure detections are integrated. Fan speed
is controlled through ModBus communication. They feature
ball bearings that are double-sealed and permanently lubricated.
OPTIVIEW LT CONTROLLER
The HMI is contained in a protection class IP54 cabinet
installed in the middle beam with hinged outer door and
includes a 7-inch controller backlighting for outdoor viewing.
Different operation levels are accessible for viewer, operator
and service. Password will be required for high level entries.
Refer to Section 7 - OPTIVIEW LT OPERATION for details.
POWER PANEL
The control elements are tted in a factory installed and wired
IP54 rain/dust tight, powder painted steel cabinets with tool
lockable, hinged, latched, and gasket sealed outer doors. Main
power connection(s), compressor starters, current overloads are
provided and factory wired.
A unit-mounted Circuit Breaker with external lockable
handle shall be provided at the point of incoming single point
connection for eld connection, interconnecting wiring to the
compressors, and isolating the power voltage for servicing.
Incoming power wiring must comply with local codes. Circuit
breaker shall be sized to provide the motor branch circuit
protection, short circuit protection and ground fault protection
for the motor branch-circuit conductors, the motor control
apparatus and the motors.
Power panel contains:
SECTION 2 – PRODUCT DESCRIPTION
Cooke Industries - Phone: +64 9 579 2185 Email: sales@cookeindustries.co.nz Web: www.cookeindustries.co.nz
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