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Engineering Guide Specifications
General
Factory-assembled and wired remote air cooled chiller .
Chiller consists of two compressors, one evaporator, safety
and operational controls . The modular remote air cooled
chiller shall incorporate one or more modules with two
independent refrigerant circuits . Modules shall be capable
of independent operation powered by a field installed fused
disconnect switch (or equivalent module circuit breaker)
supplied by others, so that any one module can be shut
down for repair without interrupting the remaining remote
air cooled chiller modules in operation .
Basic Construction
The frame design shall consist of heavy gauge galvanized
steel with 3 mil powder coat paint finish baked at 350° for
resilience in transport and installation . The module must
have a low center of gravity, detachable schedule 40 carbon
steel pipe water headers, designed to connect to adjacent
modules through the use of 300PSI rated grooved couplings,
base with cutouts for forklifts or pallet jacks and the frame
must be designed to fit through a standard 36” doorway.
Refrigeration Circuit
All refrigeration circuits shall contain R-410A non-ozone
depleting HFC . Each independent circuit shall consist of
a scroll compressor, thermostatic expansion valve for
refrigerant metering, liquid line solenoid valve, liquid
receiver, refrigerant isolation valves, sight glass, filter drier,
and high and low pressure controls and safety controls .
The modular remote air cooled chiller bank must be able to
produce chilled water even in the event of a failure of one
or more refrigerant circuits .
Evaporator
Each evaporator shall be refrigerant to water, dual circuited,
SS Brazed plate heat exchangers; UL Listed and Labeled .
The evaporator heat exchanger shall be mounted to
eliminate the effect of migration of refrigerant to the cold
evaporation with consequent liquid slugging on start-up .
The evaporator shall be mounted on two layers of noise
attenuating rubber isolation pads which also acts as a
thermal barrier . The evaporator shall be wrapped with ¾
inch closed cell insulated blanket and closed cell insulation
shall be provided on suction side refrigerant tubing
including refrigerant to chiller heat exchanger to prevent
condensation .
Compressors
Each module shall contain two scroll compressors
independently circuited for redundancy . Each compressor
shall be mounted with rubber isolated compressor mounts
to the module base and each shall include compressor
overload protection, high discharge pressure and low
suction pressure cutouts .
Starter/Control Panel
CoolLogic
Controllers shall be provided for individual control
as well as system integration . The control shall consist of a
simple two-conductor shielded daisy chain connection to
allow communication between modules with minimal field
wiring . The remote air cooled chiller control panel shall
be a NEMA Type 1 enclosure including: power distribution
block, compressor fusing, contactors, finger safe control
fusing, transformer, isolation relays, status and alarm
relay, 16-bit microprocessor master controller with built in
native Building Automation System (BAS) communication
protocols, (BACnet
®
and L
on
W
orks
®
), status indicating
lights showing: 1) compressor operation (on/off), 2)
unit alarm status, 3) power on, two toggle switches to
disable each individual compressor during start-up or
troubleshooting .
Condenser – Remote Air Cooled
Remote air cooled condensers shall be constructed
with galvanized steel casing, independent refrigeration
circuits, 1140 RPM direct drive propeller and copper tube/
aluminum fin condenser coils. The condenser coils shall
have aluminum fins bonded to seamless copper tubes in
a floating tube arrangement to eliminate tube sheet leaks
with an aluminum fin selection spacing of 8, 10, 12 or 14
fins per inch. The condenser shall have a minimum of two
refrigerant circuits, with single or dual ball bearing direct
drive fan motors and equipped with PVC coated steel wire
safety guards . Optional 540 or 830 rpm fan motors must be
available for efficiency and/or low noise criteria applications.
The remote air cooled condenser is to have a refrigerant
design side working pressure of 650PSIG, pressure fan
cycling control required for winter operation and flooded
head pressure control valve used in conjunction with fan
cycling for operation in areas with lower than 45°F ambient
operation . Custom built control panel to interface with
CoolLogic
Control System .
Summary of Contents for CLIMACOOL UCR 30
Page 19: ...17 www climacoolcorp com Voltage Phase Monitor Wiring Diagram...
Page 29: ...27 www climacoolcorp com Evaporator Water Pressure Drop Charts...
Page 30: ...28 www climacoolcorp com Glycol Performance Adjustments Factor Charts...
Page 78: ...76 www climacoolcorp com Wiring Diagram...
Page 79: ...77 www climacoolcorp com Wiring Diagram...
Page 80: ...78 www climacoolcorp com Wiring Diagram CoolLogic Control Panel...
Page 81: ...79 www climacoolcorp com Wiring Diagram CoolLogic Control Panel...
