Presented by Gary Crocker at the Restaurant Energy Education Forum on 1-13-12

1. Refrigeration Design Technologies

2. • An ind e p e nd e nt, fam ily-owne d com p any with a com m itm e nt to
quality and c us tomer s ervice
• 45 ye ars of re frige ration e xp e rie nce
• Q u ality d e s ign th at u tilize s only th e b e s t ind u s try com p one nts
• R e s p ons ive e ngine e ring and q u otation d e p artm e nts to
e fficie ntly m e e t you r ne e d s

3. Customers
Customers

4. Consultants
Robert Rippe & Associates Cini-Little International JEM Associates Schwartz Schwartz
Minneapolis, MN Germantown, MD Pleasantville, NJ & Associates (SSA)
New York, NY Las Vegas, NV Tampa, FL
Hollywood, CA Ft. Lauderdale, FL
Ricca Newmark Design Clevenger, Frable, LaVallee Romano Gatland Futch Design Associates
Denver, CO White Plains, NY Lindenhurst, NY Baton Rouge, LA
Systems Design Camacho Associates Advanced Foodservice Food Strategy
International (SDI) Atlanta, GA Solutions Potomac, MD
Greenwood Village, CO Mountville, PA
Giampietro Associates Rush Design Associates Orness Design Group Inman Foodservices Group
Deer Park, NY Montgomery, AL San Diego, CA Miami, FL

5. RDT Rack
System
Individual
Units
• Multiple roof curbs required • Single roof curb required
• Electrician must provide service to • Factory-wired control panel allows for
each individual system vs. single point connection by the electrician
• Service and installation requires re- • Convenient access to all compressors at a
location between various systems centralized location

6. Remote Refrigeration Applications
• Walk in Coolers/Freezers
• Under Counter Refrigerated Bases
• Drop-In Cold Pans
• Reach-In Coolers/Freezers
• Blast Chillers
• Air Screen Merchandisers
• Deli Cases
• Ice Maker (condenser circuits)

7. Product Line

8. Types of Compressors
Scroll
Semi-Hermetic Hermetic

9. Semi-Hermetic
• Years of proven reliability
• Accessible – parts can be
repaired and replaced
• Sight glass allows oil level
visibility
• Cast iron body efficiently
dissipates heat
• Heavy
• Most expensive

10. Hermetic
• More common in fractional
applications (1/4 – 3/4 HP)
• Utilized with refrigerated
bases, cold pans, etc.
• No oil level visibility
• Non-accessible
• Least expensive

11. Scroll
• Efficient, quiet and durable
• Compliance: scroll members
separate in the presence of liquid
or debris
• Sight glass allows oil level
visibility
• Non-accessible
• Low failure rate
• Less weight
• Low to moderate expense

12. Scroll Design
• Radial compliance
• 3 moving parts
• Quiet operation

13. The Refrigeration Cycle

16. Maximum Versatility
…all of this on only two compressors

17. Digital Scroll Compressor
• Simple, Variable Modulation for Precise
Temperature Control
• Highly Flexible Load Matching,
from 10-100%
• Reduced Power and Energy
Consumption
• Can Be Applied to Multiple Evaporator
Systems
• Reduced Compressor Cycling
• Linear Power Reduction Relative to
Modulated Capacity

18. Digital Scroll Modulation – How It Works

19. Simple, Variable Modulation for Precise Temperature Control
• Precise set point accuracy ensures reduced
frequency of compressor cycling
• Reduced compressor cycling = reduced energy
consumption

20. Digital Scroll Reduced Cycling
4
Low Temperature Compressor Cycling / Hr
Rack Avg = 1.5 Cycles / Hr
Cycles / Hr
3
32% Reduction Rack Avg = 1.0 Cycles / Hr
2
1
0
Comp 1 Comp 2 Comp 3 Digital 1 Comp 2 Comp 3
Before Digital Scroll After Digital Scroll
3/15/06 - 6/15/06 6/19/06 - 7/24/06
15
Medium Temperature Compressor Cycling / Hr
Rack Avg = 7.1 Cycles / Hr
Cycles / Hr
10
82% Reduction
5
RackAvg = 1.3 Cycles / Hr
0
Comp 1 Comp 2 Comp 3 Digital 1 Comp 2 Comp 3
Before Digital Scroll System Cycling After Digital Scroll
3/15/06 - 6/15/06 6/19/06 - 7/24/06
Reduced By 73%

21. Digital Scroll Compressor
Linear Power Reduction Relative to Modulated Capacity

22. Controller / Communication
• E2 Controls compressor
sequencing and automatically
minimizes number of running
compressors for energy savings
• Electronic control of defrost
cycles (no thermostat required)
• Monitors and alarms on
temperature rise, low oil levels
and refrigerant leaks
• Upon alarm, sends alert via
phone call, text message or
e-mail

23. Procedure for Changing Over to Emergency Compressor

24. Reduced Copper Piping / Reduced Installation Costs
Conventional Piping: Eco-Cool Piping:
Requires Each Compressor to One Line Set for Medium Temp
Have Individual Line Sets One Line Set for Low Temp

25. Conventional Refrigeration Rack
• Average power consumption
• No alarm system
• No communication system
• Larger rack size to accommodate multiple compressors
• No redundancy
• Limited versatility
• Set point accuracy +/- 6°F
• Higher installation costs

26. Eco-Cool Refrigeration System
• Increased energy efficiency (by 40%)
• Communication system with alarm and reporting
• Smaller rack size / fewer compressors
• 100% redundancy
• Maximum versatility: numerous fixtures on one compressor
• Set point accuracy of +/- 0.5°F
• Lower installation costs

28. T h e n e w In f o r m a n t b y R D T is a
m u l t if u n c t io n a l m o n it o r in g s y s t e m a n d
d a t a l o g g e r t h a t c o m m u n ic a t e s t h r o u g h
m a c h in e t o m a c h in e c e l l t e c h n o l o g y , S M S
t e x t m e s s a g in g .
Fe a t u r e s :
• Temperature Alarm
• Refrigerant Leak Detection
• Humidity Sensors
• Door Position Sensors
• Lighting Control
• Amperage Monitor
• Data Logging
N o In t e r n e t o r l a n d l in e t e l e p h o n e
c o n n e c t io n n e e d e d . F o u r t e m p e r a t u r e
p r o b e s a r e in c l u d e d .
Free Logging
K n o w t e m p e r a t u r e a n d a l a r m h is t o r y
w it h l o g g in g . T h e u n it a u t o m a t ic a l l y
s e n d s h ig h e s t , l o w e s t a n d c u r r e n t
t e m p e r a t u r e t o a Cl o u d s e r v e r .S e e
h is t o r y o n s p r e a d s h e e t o r g r a p h s . N o
s p e c ia l s o f t w a r e r e q u ir e d - o p e n a w e b
p a g e a n d g e t t h e h is t o r y .
Simple Installation
Wa l l m o u n t t h e c o n t r o l b o x . Ru n t h e t e m p
s e n s o r s in t o t h e s p a c e s t o b e m o n it o r e d .
S e n d a t e s t m e s s a g e . E a s y . Ad d s e n s o r s
f o r d o o r p o s it io n o r o t h e r c o n t a c t
(o n /o f f )d e v ic e s .

29.  P rod u ct S afe ty  D e fros ts O nly Wh e n N e e d e d , E lim inating
 H AAC P C om p liant U nne ce s s ary D e fros t C ycle s
- R e p orting Te m p e ratu re  R e d u ce d E ne rgy U s age and
- M onitoring and Logging S h orte ne d R e cove ry C ycle s
 D oor Aj M onitoring and Logging
ar  M ore C ons is te nt F re e ze r Te m p e ratu re s
 Wire le s s Logging  E xte nd e d E qu ip m e nt Life
 C ity P owe r M onitoring
Average Annual Energy Savings = $1050

30. Current Low High
Date Temp Temp Temp Alarms
2012-01-02 11:39:56PM (Mon) -7F -9F -7F
2012-01-02 10:39:31PM (Mon) -7F -9F 12F
2012-01-02 09:39:07PM (Mon) -8F -9F -7F
2012-01-02 08:38:43PM (Mon) -8F -9F -7F
2012-01-02 07:38:18PM (Mon) -9F -9F -7F
2012-01-02 06:37:49PM (Mon) -7F -9F -7F
2012-01-02 05:37:25PM (Mon) -8F -9F -7F
H AAC P C om p liant R e p orts 2012-01-02 04:37:01PM (Mon) -8F -9F 12F
 D e taile d Logs 2012-01-02 03:36:37PM (Mon) -8F -9F -7F
 G rap h ical D ata 2012-01-02 02:35:38PM (Mon) -8F -9F -7F
2012-01-02 01:35:14PM (Mon) -7F -9F -7F
2012-01-02 12:34:49PM (Mon) -8F -9F -7F
2012-01-02 11:34:25AM (Mon) -8F -8F -4F

31. Timed Defros t D efrost Com parison: Tim ed D efrost vs. Eco-Sm art On-D em and D efrost
4 Timed Defros t C ycles Per
Day
Defros t
On-Demand
On-Demand Defros t
C ycle

32. Refrigeration Design Technologies