Ice Energy IB30A-521 User guide

Ice Bear®30 Unit
Application Guide
for models:
IB30A-521
IB30A-523
IB30A-543
Phone: [phone]
Fax: [phone]
Email: [email protected]
www.ice-energy.com
F004_C © Ice Energy, Inc., 2009. All Rights Reserved. 4May09

Industry Recognition
CALIFORNIA TITLE 24 – 2005
Optional Compliance Measure
Energy Efficiency Standards, 2006
ii Ice Bear®30 Unit Application Guide
NORTHERN COLORADO
BUSINESS REPORT
Innovative Business Award, 2005
TOP-10 GREEN BUILDING
Product of 2005
BuildingGreen Magazine
Consortium of US Federal Labs
WORLD’S BEST TECHNOLOGIES,
Gold Award, 2004
FLEX YOUR POWER AWARD
for Permanent Peak Power Shifting, 2007
ENERGY VENTURE FAIR
Most Promising Company Award,
2003, 2004, 2005 ASHRAE / ARI
AHR Expo
Product of the Year, 2004
Energy Management
Green Building Innovation
A
ward 2009
Copyright, Notices, and Trademarks
© Ice Energy, Inc., 2009. All Rights Reserved.
No reproduction/distribution without permission.
While this information is presented in good faith and believed to be accurate, Ice Energy disclaims the implied
warranties of merchantability and fitness for a particular purpose and makes no express warranties except as may be
stated in its written agreement with and for its customers.
In no event is Ice Energy liable to anyone for any indirect, special or consequential damages. The information and
specifications in this document are subject to change without notice. The information and specifications in this
document are subject to change without notice. Visit www.ice-energy.com to ensure that you have the latest version.
Ice Energy, Ice Bear, and CoolData are registered trademarks and Ice-Ready, Ice-Coil, and Hybrid Cooling are
trademarks of Ice Energy, Inc. Other brand or product names are trademarks of their respective owners.

Table of Contents
Introduction................................................................................................................................................... 1
Ice Bear®30 Unit Overview ......................................................................................................................... 2
Definitions of Terms................................................................................................................................. 2
A Few of the Unique Installation & Startup Considerations ........................................................................ 3
Ice Bear®30 Unit Ratings by Ton-hour........................................................................................................ 3
Ice Bear®30 Unit Features ....................................................................................................................... 4
Approvals and Code Compliance ............................................................................................................. 4
Ice Bear®30 Unit Components................................................................................................................. 5
Modes of Operation .................................................................................................................................. 6
Applications .................................................................................................................................................. 9
Application Parameters............................................................................................................................. 9
Typical Applications............................................................................................................................... 10
Sample Ice Bear®Unit Configurations................................................................................................... 10
Controls and Sequence of Operation .......................................................................................................... 12
Control Schematic .................................................................................................................................. 12
CoolData®Controller.............................................................................................................................. 14
Sequence of Operation............................................................................................................................ 15
Product Data and Specifications ................................................................................................................. 17
Engineering Data ........................................................................................................................................ 21
Ice Bear®30 Unit Ambient Temperature Operating Ranges.................................................................. 21
Ice Bear®30 Unit ETL Certified Performance Data .............................................................................. 21
Applying an Ice Bear®30 Unit ................................................................................................................... 22
Airside Options....................................................................................................................................... 22
Equipment Selection ................................................................................................................................... 24
Ice-Ready™ Rooftop Units .................................................................................................................... 24
Installation Considerations.......................................................................................................................... 25
Minimum Clearances.............................................................................................................................. 25
Lifting ..................................................................................................................................................... 26
Mounting ................................................................................................................................................ 28
Minimum Requirements for Connection of CoolData®Controller Wiring............................................ 32
Appendix A – Cooling Load Profiles ......................................................................................................... 33
Sample Load Profile Spreadsheet........................................................................................................... 34
Appendix B – Guide Specifications............................................................................................................ 35
Appendix C – Ice Bear 30 Unit Equipment Schedule................................................................................. 37
Appendix D – Title 24 Building Energy Standards Models ....................................................................... 38
Appendix E – Ice-Ready RTU & Ice-Coil Performance Data .................................................................... 39
Ice Bear®30 Unit Application Guide iii

iv Ice Bear®30 Unit Application Guide
List of Figures
Figure 1 – Ice Bear®30 Unit External View ........................................................................................................5
Figure 2 – Ice Bear®30 Unit Internal View..........................................................................................................5
Figure 3 – Refrigerant Flow Schematic – Ice Make Mode...................................................................................7
Figure 4 – Refrigerant Flow Schematic – Ice Cooling Mode ...............................................................................8
Figure 5 – Ice Bear®` 30 Unit (Parallel) with Ice-Ready™ Rooftop Unit..........................................................10
Figure 6 – Redundant (Parallel) Split System.....................................................................................................11
Figure 7 – Control Schematic .............................................................................................................................12
Figure 8 – Single Zone, Single-stage Thermostat with Economizer and Backup Condensing Unit...................13
Figure 9 – Single Zone, Two-stage Thermostat with Economizer and Backup Condensing Unit .....................13
Figure 10 – CoolData®Controller ......................................................................................................................14
Figure 11 – Ice Bear®30 Unit Dimensions Rear & Side Views.........................................................................18
Figure 12 – Ice Bear®30 Unit Dimensions Top View .......................................................................................18
Figure 13 – Ice Bear®30 Unit Dry Center of Gravity (Left)..............................................................................19
Figure 14 – Ice Bear®30 Unit Dry Center of Gravity (Top) ..............................................................................19
Figure 15 – Ice Bear®30 Unit Wet Center of Gravity (Left)..............................................................................20
Figure 16 – Ice Bear®30 Unit Wet Center of Gravity (Top).............................................................................. 20
Figure 17 – Ice Bear®30 Unit with an Ice-Ready™ Rooftop Unit ....................................................................22
Figure 18 – Ice Bear®30 Unit with an Additional (Slab) Ice-Coil™.................................................................23
Figure 19 – Ice Bear®30 Unit with an Additional (“N”) Ice-Coil™..................................................................23
Figure 20 – Ice Bear®30 Unit with a Ductless Liquid Overfeed Coil................................................................24
Figure 21 – Minimum Clearances for Unit-mounted Service Disconnect.......................................................... 25
Figure 22 – Minimum Clearances for Remotely Mounted Service Disconnect .................................................26
Figure 23 – Ice Bear®30 Unit Lifting Points .....................................................................................................27
Figure 24 – Recommended Spreader Bar Configuration....................................................................................27
Figure 25 – Minimum Recommended Concrete Pad Dimensions......................................................................28
Figure 26 –Sample Precast Concrete Pad ........................................................................................................... 29
Figure 27 – Ice Bear®30 Unit on Structural Curb with Cap ..............................................................................30
Figure 28 – Ice Bear®30 Unit Base Dimensions................................................................................................31
Figure 29 – Ice Bear®30 Unit Base Cross Section.............................................................................................31
Figure 30 – Design-Day Cooling Load Profile (Example) ................................................................................. 33
Figure 31 – Sample Load Profile........................................................................................................................ 34

Introduction
Introduction
Thermal Energy Storage (TES) is a well-recognized energy management tool that transfers a large portion
of the electricity required for air conditioning from high-price, on-peak hours to low-price, off-peak
hours. TES systems using ice storage allow an air conditioning system to operate during off-peak hours,
transferring clean and less expensive electrical energy into stored energy. The stored cooling energy in
the ice is later delivered to provide air conditioned comfort during on-peak hours when electricity prices
are higher and electrical power is limited, less reliable, and more polluting.
Traditionally, TES systems have benefited only large energy users, such as hospitals, large office
buildings, college campuses, and schools. The ICE BEAR®30 unit was developed specifically so that
buildings with small air conditioning and power requirements can receive comparable energy and
environmental benefits using a variety of packaged rooftop and split system air conditioners.
Thermal Energy Storage systems address the electrical system problems that other energy efficiency
measures do not address, in particular, resource allocation to meet the supply and demand of electricity.
Peak energy costs and emission concerns will continue to be a problem for the foreseeable future. Many
utilities offer rate structures that encourage energy management systems such as TES. Time-of-Use
(TOU) rates have become standard tariffs offered by many utilities. The substantial energy price
difference between on-peak and off-peak periods provide a significant financial incentive for using some
form of thermal energy storage. The higher costs of peak electricity reflect the pollution mitigation costs
associated with the higher emissions rates of peak energy generation.
A growing number of states are adopting energy efficiency standards above and beyond the federal
appliance standards. For example, the California Building Energy Efficiency Standards “performance
approach” uses a modified ASHRAE 90.1 methodology to establish the allowable energy consumption of
a proposed building project as compared the energy consumption of a minimally-compliant of a similar
building of similar occupancy, construction type and location. California’s Title 24 Standards estimate a
proposed building’s energy budget using an hourly time-of-use methodology and assigns a unique source
energy multiplier for each hour of the year to arrive at an estimate of the amount of source energy
required to provide the energy needs of the proposed building. The utility’s complete electricity network
costs, such as generation, transmission and distribution, and environmental mitigation are estimated for
each hour of the year establishing a Time Dependent Valuation (TDV) of energy. The resulting
calculation estimates a more accurate hourly cost and environmental impact of building energy
consumption. An hourly TDV multiplier for each of the state’s 16 climate zones translates site energy use
into a more accurate approximation of total source energy costs. When this TDV multiplier is applied to
an Ice Bear unit and conventional air conditioning systems of the equal capacity, the ice storage system
has as much as 22 times more TDV energy savings potential during peak periods.
Utility cost savings are clearly just one of the benefits provided by the Ice Bear unit. Ice storage plays a
significant role in obtaining certification points for the United States Green Building Council’s LEED®
program. The Ice Bear unit’s superior cooling comfort, reliability, and reductions in the energy budget
can earn one to five Energy and Atmosphere Credits and up to 6 credits in other categories.
Ice Bear®30 Unit Application Guide 1

Ice Bear® 30 Unit Overview
Ice Bear®30 Unit Overview
The Ice Bear®30 unit is an off-the-shelf hybrid condensing unit for use with direct expansion air
conditioning systems. The Ice Bear unit is designed to store energy at night and then shift the on-peak
electrical energy of a condensing unit common to packaged rooftop, split, and mini-split systems. A
typical application will shift the electrical energy consumed by a 5-ton scroll compressor and its
associated condensing unit fans operating under full load conditions for 6 hours continuously.
Electrically, the Ice Bear unit shifts approximately 30 kW-hours of energy to the off-peak, thus reducing
the on-peak demand by about 6 kW for six hours.
The Ice Bear unit runs its integral condensing unit for about 10 hours continuously, during the coolest
part of the night, to store energy in the form of ice (30 latent ton-hours). The control signal from the
thermostat or building management system is received by the Ice Bear unit’s CoolData®controller.
Based on the time-of-day, or upon a command to shed electrical demand initiated by the utility, the
controller determines if the Ice Bear hybrid condensing unit or the electrically operated condensing unit
will operate. In the case of the Ice Bear unit, it pumps enough oil free R-410A refrigerant to an Ice-Coil
evaporator to provide effective cooling for up to 5 tons of continuous load for six hours, using less than
300 watts of power. A unique and important design feature is the Ice Bear unit’s cooling performance
independent of outdoor ambient or rooftop temperature; in other words, it can be 75 °F or 140 °F and the
Ice Bear unit and its associated Ice-Coil’s cooling performance (5-ton rating) is unchanged.
Definitions of Terms
Base System: A refrigerant based, direct expansion (DX) air conditioning system, commonly referred to
as a packaged rooftop unit, split system, or mini-split system. A typical base system includes a
condensing unit, an evaporator, a blower, and controls.
Ice-Coil™ Kit: An Ice-Coil and ancillary equipment needed to convert a packaged rooftop unit into an
Ice-Ready Rooftop Unit.
Ice-Coil™: A flooded evaporator coil provided by Ice Energy, or modified to Ice Energy’s
specifications. The Ice-Coil is dedicated to the Ice Bear unit and is sometimes referred to as a liquid
overfeed evaporator coil.
Ice-Cooling:The process whereby the Ice Bear unit’s stored ice cools the refrigerant used to provide
cooling to a building space during peak energy hours (typically noon to 6pm).
Ice-Make:The nighttime process by which the Ice Bear unit converts its tank of water into a tank of ice
to be used for cooling the next day during the peak energy hours (typically noon to 6pm).
Ice-Ready™ Rooftop Unit: A packaged rooftop unit modified to include an Ice-Coil.
Multi-Stage System: A packaged rooftop unit, typically greater than 5 tons, that includes multiple
independent refrigeration circuits, for example a 10-ton unit with two 5-ton circuits.
Peak Shifting: Shifting electric load from the utility defined on-peak period to the off-peak period. On-
Peak hours are typically noon through 6 pm.
Redundant Coil: The addition of an Ice-Coil to a packaged rooftop unit or split system.
Summer Mode: The CoolData®controller’s programming is optimized to ensure that stored cooling is
available during peak energy hours.
Standard Circuit: A common DX refrigeration circuit that includes an evaporator coil, expansion
device, and condensing unit.
2 Ice Bear®30 Unit Application Guide

A Few of the Unique Installation & Startup Considerations
Ton-hours: Capacity in tons times the number of hours (e.g., 5 tons for 6 hours = 30 ton-hours); an
important design consideration for fixed capacity storage units such as the Ice Bear unit.
Winter Mode: The CoolData controller is programmed to extend the Ice Cooling hours to more fully
utilize the stored cooling capacity of the unit.
A Few of the Unique Installation & Startup Considerations
•In addition to the Base System, an Ice-Coil must be used, which is typically a Redundant Coil.
oA flooded evaporator coil is provided by Ice Energy, or modified to Ice Energy’s
specifications, or included as part of an Ice-Ready Rooftop Unit, whose sole purpose is to
connect to the Ice Bear unit. Uniquely, an Ice-Coil does not use any type of expansion
device (orifice, TXV, or EEV); hence the term liquid overfeed or flooded coil. A mixed
phase of liquid and vaporized refrigerant may return to the Ice Bear unit.
•Length, Sizing, and Insulation of the refrigerant supply and return line sets.
oThe Ice Bear unit may be located on the ground or on the roof in close proximity to the
Ice-Coil; there are distance and elevation limitations to consider. A unique feature of the
Ice-Coil circuit is that it is charged with oil free R-410A refrigerant.
oThe liquid supply line from the Ice Bear unit to the Ice-Coil and the vapor return line
from the Ice-Coil to the Ice Bear unit are uniquely sized to Ice Energy’s design
specifications. Both the liquid supply and the vapor return line sets must be insulated.
•When to fill with water and its associated weight
oOne of the last steps in the startup sequence is to fill the Ice Bear unit with about 450
gallons of tap water. When to fill the Ice Bear unit is important; filling too soon could
cause significant and costly damage to the unit.
oThe filled weight of the Ice Bear unit is an important consideration for both ground
mount and roof mount applications.
•Remote Monitoring and Control
oThe Ice Bear unit is centrally monitored and may be controlled remotely. To enable this
feature, the unit must be connected to the Ice Energy Network Operations Center by a
wired or by wireless data service (such as the Internet). Typically, a wireless (3G) data
connection is installed and configured by Ice Energy. Provision may be required for an
external antenna and/or an alternate service (Internet) connection in areas where coverage
is inadequate.
•Heat Pumps
oWhen applying an Ice Bear 30 unit to a heat pump, the Ice Bear unit must have a
dedicated (redundant) Ice-Coil.
Ice Bear®30 Unit Ratings by Ton-hour
Importantly, the Ice Bear unit has a limited amount of cooling capacity and therefore proper consideration
of the building’s cooling load profile is a critical step and must not be overlooked. The Ice Bear unit
should not be used as the only source of cooling for typical office building, restaurant, and retail designs.
•Storage capacity: 30 ton-hours at a peak load of 5 tons
o5 tons for 6 hours, or 4 tons for 7.5 hours, or 3 tons for 10 hours
•Instantaneous output capacity is unaffected by ambient temperature
Ice Bear®30 Unit Application Guide 3

Ice Bear® 30 Unit Ratings by Ton-hour
Ice Bear®30 Unit Features
The Ice Bear 30 unit is a highly flexible TES system which can be installed “out-of-the box” in a wide
variety of configurations and environmental settings.
•Storage capacity: 30 ton-hours at a peak capacity of 5 tons
•Remotely programmable Ice Make/Ice Cooling schedules
•Remote monitoring of operation and equipment performance
•Instantaneous output capacity unaffected by ambient temperature
•Versatile staging
oOffloading a single stage of a two-stage Ice-Ready™ rooftop unit
•Rooftop or ground mounting options
•Maximum refrigerant line length: up to 150 feet between Ice Bear 30 and rooftop unit
•Maximum vertical lift: up to 35 feet above the Ice Bear 30 unit.
•Electrical consumption:
oOn-peak Ice Cooling: 300 watts (nominal)
oOff-peak Ice Make: 3,470 watts (typical at 75 °F)
•Three models:
oIB30A-521—208/230V, 1 phase
oIB30A-523—208/230V, 3 phase
oIB30A-543—460V, 3 phase
Approvals and Code Compliance
Ice Energy has contracted with Intertek’s ETL SEMKO division to provide independent
confirmation of the capabilities of the Ice Bear 30 Unit. See Ice Bear® 30 Unit ETL Certified
Performance Data later in this manual.
The Ice Bear 30 unit has been approved for use as a Title 24 Compliance Option in the state of California.
Refer to Appendix D – Title 24 Building Energy Standards Models for more information.
4 Ice Bear®30 Unit Application Guide

Ice Bear® 30 Unit Ratings by Ton-hour
Ice Bear®30 Unit Components
Ice Storage
Tank
Fans
Refrigerant
Management
System (RMS)
Figure 1 – Ice Bear®30 Unit External View
CoolData
®
Controller
Ice-Make
Condensing
Coil
Figure 2 – Ice Bear®30 Unit Internal View
Ice Bear®30 Unit Application Guide 5

Ice Bear® 30 Unit Ratings by Ton-hour
Modes of Operation
The Ice Bear unit is capable of operating in the following modes:
•Ice Make mode
oNight (off-peak) operation
oStoring energy, charging, making ice
•Ice Cooling mode
oPeak period operation (call for cooling)
oDischarging the stored energy, melting the ice
Note that Ice Make mode may also be referred to as “Ice Charge” or “Ice Build”. Ice Cooling mode may
also be known as “Ice Discharge” or “Ice Melt”.
Ice Make Mode
During Ice Make mode, the integral and factory pre-charged Ice Bear condensing unit (R-410A
refrigerant and miscible oil) provides low temperature refrigerant to the Ice Bear unit’s Refrigeration
Management System (RMS). On the secondary side of the RMS, a separate, oil-free R-410A charge
automatically circulates through a heat exchanger until the tap water freezes into a solid block of ice.
Ice make is typically 10 hours for a full 30 ton-hour charge and is made during the coolest time of night
or when electrical utility rates are at their lowest, or off-peak times.
Why Make Ice?
It takes 1 BTU of energy to lower the temperature of one pound of water 1 °F.
For example, it takes 1 BTU of energy to lower the temperature of one pound of water from 38 °F to
37 °F.
However, it takes 144 BTU’s of energy to change the state of one pound of water from a liquid to a solid
(ice). Therefore, it takes 144 BTU’s of energy to change the state of one pound of 32 °F water from a
liquid into ice.
The Ice Bear unit’s block of ice is sized to store 30 ton-hours of energy. There are 12,000 BTU’s per ton,
so the 30 ton-hours of stored energy are equivalent to 360,000 BTU’s. A 60,000 BTU/hour cooling load
or exactly the cooling load of one 5-ton Ice Coil (12,000 BTU’s / ton x 5 tons) running for six hours
would consume the entire Ice Make or 360,000 BTU’s of stored energy.
6 Ice Bear®30 Unit Application Guide

Ice Bear® 30 Unit Ratings by Ton-hour
Figure 3 – Refrigerant Flow Schematic – Ice Make Mode
Ice Bear®30 Unit Application Guide 7

Ice Bear® 30 Unit Ratings by Ton-hour
Ice Cooling Mode
During Ice Cooling mode, the integral Ice Bear condensing unit is switched off and typically one 5-ton
condensing coil on the Base System is locked out. The Ice Cooling circuit, which includes an ice-on-coil
heat exchanger, a refrigerant pump, and Ice-Coil™ are physically isolated from the Ice-Make circuit and
its refrigerant charge by a unique receiver/separator. When there is a request for cooling, a refrigerant
pump circulates the oil-free liquid R-410-A refrigerant through the liquid supply line to an Ice-Coil
located in the air stream. Typically this is a Redundant Ice-Coil installed into a packaged rooftop unit or a
slab coil mounted in the air supply duct. The vapor return line returns vaporized or mixed phase
refrigerant to the Ice Bear unit’s ice-on-coil heat exchanger where it melts ice and is condensed back into
its liquid state.
Figure 4 – Refrigerant Flow Schematic – Ice Cooling Mode
8 Ice Bear®30 Unit Application Guide

Applications
Applications
Application Parameters
There are parameters that apply to every Ice Bear unit installation. Below is a list of installation
constraints that need to be strictly followed to ensure proper operation and reliability of the Ice Bear unit.
Installation constraints for the Ice Bear unit:
Item Specification
Line Set Sizing Ice-Coil™ supply line = 1/2”
Ice-Coil return line = 7/8”
(Both lines must be insulated.)
Maximum overall
length (to Ice-Coil)
150 ft including vertical head (maximum 20 fittings)
Maximum vertical head
Ice-Coil supply line
35 ft
Maximum vertical head
Ice-Coil below Ice Bear
unit
20 ft
Maximum fittings per
line (supply & return)
20
Minimum insulation
wall thickness
1/2” or minimum required by local code, whichever is greater.
Isolation valves with
service ports
Isolation valves with service ports must be field installed in the Ice-
Coil supply and return lines, as close as possible to the coil.
Sight Glasses Install sight glasses in the Ice-Coil supply and return lines, as close
to the Ice Bear unit as possible.
Any deviations from the above parameters require review by Ice Energy’s Technology department.
NOTE: When applying an Ice Bear 30 unit to a heat pump, the Ice Bear unit must have a dedicated
(redundant) Ice-Coil.
Ice Bear®30 Unit Application Guide 9

Applications
Typical Applications
•Single zone
•Single Ice Bear unit or multiple Ice Bear units
•Partial storage system in a multi-stage configuration (displacing one or two stages of a multi-stage
system)
NOTE: When applying an Ice Bear 30 unit to a heat pump, the Ice Bear unit must have a dedicated
(redundant) Ice-Coil.
Sample Ice Bear®Unit Configurations
•Ice Bear unit (parallel) with Ice-Ready™ rooftop unit
•Redundant (parallel) split system
Ice Bear®30 Unit (Parallel) with an Ice-Ready™ Rooftop Unit
The Ice Bear unit integrates with a modified packaged rooftop unit called an Ice-Ready rooftop unit. The
Ice-Ready rooftop unit, illustrated in the figure below, is a standard rooftop unit modified to include an
additional liquid overfeed coil (Ice-Coil™) that is dedicated to the Ice Bear unit. Specific systems are
available from name brand unit manufacturers as Ice-Ready rooftop units. For a list of currently
approved Ice-Ready rooftop units, and Ice-Coil kits, refer to the Ice-Ready™ Products Selection Guide
(Ice Energy form F091) or visit www.ice-energy.com. For other airside options, contact Ice Energy
Product Services (email [email protected] or call [phone]).
Figure 5 – Ice Bear®` 30 Unit (Parallel) with Ice-Ready™ Rooftop Unit
10 Ice Bear®30 Unit Application Guide

Applications
Redundant (Parallel) Split System
In a redundant split system, the Ice Bear unit provides cooling as part of a separate and parallel redundant
refrigerant loop. It is only designed to take on a load for a designated period of time. The liquid overfeed
Ice-Coil is located downstream of the existing or “regular” standard DX coil.
The Ice Bear unit handles the designated load during peak load conditions, while the remainder of the
system handles the cooling load during the remainder of the day.
Figure 6 – Redundant (Parallel) Split System
Ice Bear®30 Unit Application Guide 11

Controls and Sequence of Operation
Controls and Sequence of Operation
Control Schematic
Figure 7 – Control Schematic
12 Ice Bear®30 Unit Application Guide

Controls and Sequence of Operation
Control Configuration Example 1
Figure 8 – Single Zone, Single-stage Thermostat with Economizer and Backup Condensing Unit
Control Configuration Example 2
Figure 9 – Single Zone, Two-stage Thermostat with Economizer and Backup Condensing Unit
Ice Bear®30 Unit Application Guide 13

Controls and Sequence of Operation
CoolData®Controller
Features
The CoolData controller is an advanced control system that provides both controlling and monitoring
functions for the Ice Bear unit. Also, CoolData has bidirectional control and communication capabilities
for Smart Grid integration, including:
•configuration management
•real-time control
•advanced and optimal control
•real-time status, submetering, and monitoring
•performance analysis and automated diagnostics
•equipment health management
•event capture and analysis
•push and polling communications
•physical & cyber security
•data integrity readied for transactions with enterprise-level communication
Ethernet Cable
Connector
LED Indicators
Figure 10 – CoolData®Controller
14 Ice Bear®30 Unit Application Guide

Controls and Sequence of Operation
Sequence of Operation
The Ice Bear unit is thermostatically controlled in the same manner as a conventional DX system. The
controller for the Ice Bear unit regulates the refrigerant and the unit’s internal components similarly to a
conventional DX air conditioning system. When a packaged unit is equipped with an economizer, the
economizer and the HVAC system will operate normally in collaboration with the Ice Bear unit.
The Ice Bear unit’s programmable controller responds to a single- or two-stage thermostat input. Either
configuration allows the Ice Bear unit to control the base system (allowing DX cooling during Ice Make,
for example). With a two-stage input, the Ice Bear unit and the additional system may be set up to
provide cooling simultaneously; whereas, with a single-stage input, only one system will provide cooling
at any given time. A single stage DX system connected to an Ice Bear unit is referred to as the backup
system. In a two-stage DX system with matching thermostat, the second DX system is referred to as a
parallel system. The programming for the Ice Bear unit’s internal controller is based on the desired Ice
Make and Ice Cooling operations. The Ice Bear unit can be configured to provide Ice Cooling for any
period of time consistent with the maximum cooling capacity, tank charge capacity, and tank recharge
requirements. The desired operating schedules are set prior to shipment or by a certified installer in the
field and can, if required, be reprogrammed remotely for optimization purposes.
The Ice Bear unit integrates with facility control systems and simple thermostats through traditional
24VAC signals, both for control and status feedback. No other communications to a facility management
system are required. The Ice Bear unit is unique as an energy storage device in that it is a fully packaged,
self-contained system. As such, it optimizes its performance independently of a facility management
system. Integration for Supervisory Control and Data Access (SCADA), additional monitoring, and other
advanced features are viable, but are not part of the standard offering.
For California Title 24 compliance applications, the programming is unalterable and operates within the
parameters of the specified product model. Control parameters are given at the factory.
Charging (Ice Make Mode)
Startup Sequence
1. Fan #1 starts and the Electronic Expansion Valve (EEV) is reset. (Charging LED blinks once.)
2. There is a 4 second delay.
3. Fan #2 starts.
4. Initial EEV position is set.
5. There is a 26 second delay.
6. Superheat set point is derived from the Condenser liquid temperature.
7. Compressor starts. (Charging LED blinks 3 times).
8. There is a 10 second delay.
9. EEV will start to control the system. (Charging LED is on solid.)
Full Charge Cutoff Sequence
1. Upon reaching charge cutoff pressure (typically 98.5 psia), the charging operation shuts down after
5 minutes.
2. The EEV is set to the closed position.
Ice Bear®30 Unit Application Guide 15

Controls and Sequence of Operation
Cooling (Ice Cooling Mode)
Startup Sequence (call for cooling)
1. Refrigerant Pump and Solenoid Valve are energized and Water Pump starts.
2. Refrigerant Pump is initially set to minimum speed. (Cooling LED repeatedly blinks twice.)
3. There is a 10 second delay.
4. Refrigerant Pump is set to its final speed. (Cooling LED on solid until call for cooling ends, ice is
exhausted, or system transitions out of the configured ice cooling time window, as determined by
unit’s specific configuration.)
Shutdown Sequence (no call for cooling)
1. Water and Refrigerant Pumps shut down.
2. There is a 15 second delay.
3. Individual zone relay is closed.
Full Discharge Cutoff Sequence
1. Discharge cutoff condition is achieved; i.e., cutoff pressure is reached (typically 165 psia) or the
Tank water reaches a temperature of 48 °F (typical).
2. There is a 5 minute delay.
3. Refrigerant and Water Pumps are shut down.
4. There is a 15 second delay.
5. Individual zone relays are closed, if defined.
16 Ice Bear®30 Unit Application Guide