Bulletin 414-CERT
Dear EVAPCO Customers:
EVAPCO is pleased to introduce our
new SST-A Series of stainless steel
tube, aluminum fin evaporators! The
SST-A thermal performance ratings
are in accordance with AHRI
Standard 420, “Performance Rating
of Forced-Circulation Free-Delivery
Unit Coolers for Refrigeration.” This rating method has been
applied for each product family within the SST-A Series, including
the SSTMA, SSTXA and SSTLA.
More importantly, the thermal performance and power ratings for
the SSTMA, SSTXA and SSTLA evaporator product lines are
independently certified per the requirements outlined in the AHRI
Operations Manual entitled Unit Coolers for Refrigeration
Certification Program. The SSTMA, SSTXA and SSTLA Series are
the three EVAPCO evaporator product groups covered in the AHRI
certification program at this time.
AHRI Evaporator
Certification Program
(1)
Program Overview:
The AHRI Evaporator Certification Program provides an
independent verification of the evaporator manufacturer’s stated
equipment performance based on thermal tests done in
accordance with AHRI Standard 420–Performance Rating of
Forced-Circulation Free-Delivery unit coolers for Refrigeration.
Participation in AHRI’s Evaporator Certification Program is available
to all manufacturers of products which fall into the scope of the
program, whether or not the manufacturer is a member of AHRI.
Participation in the program is voluntary.
Program participants must comply with the provisions of the latest
edition of AHRI Standard 420. A copy of the Standard is available
for download from the AHRI website, www.ahrinet.org
Product Definitions:
EVAPCO’s decision to introduce AHRI Certified SSTMA, SSTXA and
SSTLA evaporators reflects the company’s commitment to provide
independently certified products throughout the world, whenever
a recognized certification program exists. The thermal
performance and power ratings of these new products have been
verified as a result of full scale thermal testing by AHRI Certification
Engineers in EVAPCO’s Low Temperature Laboratory, which was
“certified” for product testing as part of the AHRI program.
Forced-Draft Free-Delivery Evaporators for Refrigeration
(Unit Coolers)
As a result of this initiative, refrigeration engineers, contractors
and end-users have the assurance that the EVAPCO industrial
evaporators they select, install and operate will perform as
specified based on the ratings methodology outlined in the AHRI
Certification Program Operations Manual.
Program Scope:
EVAPCO is pleased to be leading this charge – it is the right thing to
do and the right time to do it! Heat Transfer product performance
and efficiencies are being increasingly regulated in Federal, State
and Local building codes. In order for these codes to be properly
enforced, and to create a level playing field for all manufacturers,
we believe the product thermal performance must be determined
using a standard ratings method and verified through a government
recognized, third party certification program.
AHRI is a highly regarded trade association which offers very
stringent product certifications programs. As a result, regulators
throughout all levels of government “are increasingly motivated to
depend upon AHRI for the accurate and unbiased evaluation of
HVACR equipment.”
We believe federal, state and local regulations will continue to
expand their emphasis on energy consumption and overall
product efficiency in the future. Manufacturers of commercial
and industrial heat transfer products will be required to offer
only those products whose thermal performance have been
independently certified.
EVAPCO enthusiastically embraces this challenge. As a leading
global supplier of heat transfer products, we are committed to use
our extensive research and development and product marketing
capabilities to improve heat transfer efficiency and promote
certified products throughout the world.
A factory made assembly including means for forced air circulation
and elements by which heat is transferred from air to refrigerant
without any element external to the cooler imposing air
resistance. Evaporators utilize a volatile refrigerant fed by either
direct expansion (DX) or liquid overfeed with ratings based on wet
and/or dry conditions.
The AHRI Evaporator Certification Program applies to production
models of evaporators which meet the following criteria:
1. Use refrigerant R-404A or R-507A for direct expansion (DX)
coils or R-717 for DX and/or liquid overfeed coils
2. Aluminum fin material
3. Single vertical coil
4. Horizontal only air flow direction (the airs flows to or from the
inlet face of the coils from or to the fan inlet, with no change
in direction)
5. Axial fans only
EVAPCO model SSTMA, SSTXA and SSTLA units fall within the
current scope of the AHRI Certification Program as outlined above.
SSTWA and SSTDA models are outside the scope of the AHRI Unit
Coolers Certification Program, but are rated in accordance with
AHRI Standard 420.
Evaporators which fall within the scope of the certification
program but outside the testing capability of the Independent
Third-party Laboratory contracted by AHRI, or AHRI Approved Test
Stand within the Facility, must be certified under this program.
Large unit coolers that cannot be tested in the Laboratory or the
Participant’s facility shall be certified under the AHRI Unit Coolers
Certification Program provided the following conditions are met:
1. The unit cooler coil number of rows, fin spacing, and fin
thickness match a model that can be tested.
2. The air velocity entering the coil face falls within the range of
calculated air velocities for the unit coolers that can be tested.
3. The Participant’s Selection Rating Software used to predict
unit cooler capacity accounts for circuit temperature change
and refrigerant side heat transfer as a function of refrigerant
circuit loading and length.
AHRI will approve the large Unit Cooler ratings only if all of the
above conditions are met and the large unit coolers ratings are
proportional to the unit coolers that can be tested.
Sincerely,
EVAPCO, Inc.
William G. Bartley
President & CEO
©2013 EVAPCO, Inc.
AHRI Certification Program
Qualification Process
(1)
Model Designation by Basic Model Group:
Testing Requirements:
Program Participant’s evaporator product lines are classified into Basic
Model Groups (BMG) based on specific criteria as tube diameter, tube
material, fin type, fin thickness, refrigerant, feed, etc.
All Standard Ratings of Unit Coolers must be verified by tests
conducted at Standard Ratings Conditions (Table 1.) in accordance
with one of three Test Methods:
1. DX – Dual Instrumentation
2. DX – Calibrated Box
3. Liquid Overfeed
EVAPCO’s AHRI Certified Evaporators are currently represented by
the following BMG’s:
1. SSTMA & SSTXA Models - 5/8” stainless steel tube, enhanced fin
or enhanced variable-fin with liquid overfeed.
2. SSTMA & SSTXA Models - 5/8” stainless steel tube, flat fin, flat
heavy fin or flat variable-fin with liquid overfeed.
3. SSTMA & SSTXA Models – 5/8” stainless steel tube, enhanced
fin or flat fin, direct expansion (DX)
4. SSTLA Models – 1.05” stainless steel tube, enhanced fin or
enhanced variable-fin with liquid overfeed.
5. SSTLA Models – 1.05” stainless steel tube, flat fin, heavy fin or
variable-fin with liquid overfeed.
Selection and Qualification Testing:
AHRI Certification thermal tests for evaporators using ammonia
(R-717) as the refrigerant were tested at EVAPCO’s Low Temperature
Laboratory located in Taneytown, Maryland. In order for EVAPCO’s
Low Temperature Laboratory to be used in this manner, AHRI had to
inspect and certify the laboratory to ensure that it meets specific
testing requirements and is in compliance as outlined in Standard 420.
Testing for all other refrigerants within the scope of the program will
be performed at Intertek Group, plc located in Plano, Texas.
The AHRI Certification Program requires that 20% of the participant’s
BMG’s be tested, with a minimum of two (2) models each year. Within
90 days of submitting the performance ratings and published
selection software to AHRI requesting qualification tests, EVAPCO
was required to have the evaporator sample(s) available for testing.
AHRI selected the point(s) of operation for the sample(s) based on
the AHRI Standard 420.
All regularly furnished equipment which affect performance must be
in place during the test.
The refrigerant used during the test must be the one which is
published for use with the evaporator.
Each Standard Rating test must be performed at either 50Hz or 60 Hz
and the highest rated voltage as specified by the manufacture on the
unit or motor nameplate.
Precision instruments and automated electronic data acquisition
equipment must be used to measure and record temperature,
pressure and refrigerant flow rates.
All measuring instruments and instrument systems; such as, data
acquisition coupled to temperature, pressure or flow sensors, must be
calibrated by comparison to primary or secondary standards with
calibrations traceable to National Institute of Standards and
Technology (NIST) measurements, other recognized national
laboratories or derived from accepted values of natural physical
constants. All measuring instruments must calibrated annually,
whenever damaged or when the accuracy is called into question.
All measuring instruments must be selected to meet or exceed the
accuracy listed in Table 2.
Qualification testing in accordance with the Standard is performed by
a Third-Party contracted by AHRI on the sample unit(s) at the selected
point of operation to verify the thermal capacity of the sample unit
against the manufacturer’s published ratings.
Table 1. – Standard Rating Conditions
Condition
Number
Coil
Condition
1
2
3
4
5
Wet
Dry
Dry
Dry
Dry
Dry-Bulb
Temperature
Entering Air
Wet-Bulb
Relative
Temperature
Humidity1
Dew Point
Temperature1
Refrigerant
Saturation
Temperature2
Temperature
Difference
°F
°C
°F
°C
%
°F
°C
°F
°C
°F
°C
50
50
35
10
-10
10
10
1.7
-12.2
-23.3
46.1
–
–
–
–
7.83
–
–
–
–
75
< 45
< 50
< 46
< 43
–
< 30
< 20
< 5.0
< -25
–
< -1.1
< -6.7
< -21
< 32
35
35
25
0
-20
1.7
1.7
-3.9
-17.8
-28.9
15
15
10
10
10
8.3
8.3
5.6
5.6
5.6
Notes:
1. The dry coil condition can be confirmed by measuring either the entering air dew point or relative humidity according to the instrumentation requirements of
Table 2. At wet coil condition, relative humidity is for reference only.
2. Measured at coil outlet.
Table 2. – Instrumentation Accuracy
Measurement
Temperature
Relative humidity1
Air dry-bulb
Air wet-bulb
Refrigerant liquid
Refrigerant vapor
Air Dew Point
Others
Air
Refrigerant
Pressure
Air
Flow
Electrical
Minimum Accuracy
I-P
SI
Medium
Refrigerant
Liquids
Auxiliary kilowatt
input (e.g. heater)
Motor
kilowatts /amperes / voltage
Speed
Motor / fan shaft
Weight
Oil / refrigerant solution
Specific Gravity
Brine
Time
Hours / minutes / seconds
± 0.10 °F
± 0.06 °C
± 0.5 °F
± 0.3 °C
± 0.5 °F
± 0.3 °C
± 1.0 °F
± 0.6 °C
± 3% points rh
Pressure
Pressure
corresponding to
corresponding to
± 0.2 °F of
± 0.1 °C of
saturation
saturation
temperature
temperature
± 0.05 inches of
169 Pa
mercury
1% of reading
1% of reading
Instrument Examples
Resistance Temperature Device
(RTD) Thermistor
Special calibrated thermocouple
Chilled mirror hygrometer
Liquid-in-glass thermometer
Capacitive or resistive rh sensor
Transducer
Barometer
Mass flow meter
Venturi
1% of reading
Power meter
Amp probe
Multimeter
1% of reading
Tachometer
0.5% of reading
1% of reading
0.5% of time interval
Gravimeter (scale or analytical balance)
Hydrometer
Electronic clock
Note:
1. Relative humidity and air dew point measurements are intended to confirm the dry coilcondition for the test condition numbers 2 through 5.
Certified Data:
At Standard Rating Conditions designated in the Standard, the
following certified ratings are verified by test:
䡲 Gross Total Cooling Effect (Btu/h)
䡲 Rated Power (Watts or Horsepower)
After successful verification of the evaporators thermal
performance the manufacture is officially welcomed to the AHRI
Certification Program and the certified products are listed in the
AHRI Directory, www.ahridirectory.org. At that time, published
ratings for the certified products must include the Standard
Ratings at which the unit will be produced, marketed or sold.
All claims made with regard to ratings for products within the
scope of the standard must be accompanied by the statement,
“Certified in accordance with the AHRI Unit Coolers Certification
Program, which is based on AHRI Standard 420. Certified units
may be found in the AHRI Directory at www.ahridirectory.org.”
All claims to ratings made outside the scope of the standard must
include the statement “Unit is outside of the scope of AHRI Unit
Coolers Certification Program, but is rated in accordance with
AHRI Standard 420.”
Required Published Ratings
All published Standard Ratings and Application Ratings must include the following:
a.
b.
c.
d.
e.
f.
g.
h.
i.
Model Number
Gross Total Cooling Effect, Btu/h [W]
Temperature Difference, °F [°C]
Refrigerant designation(s) in accordance with ANSI/ASHRAE Standard 34 with Addenda
Refrigerant Saturation Temperature, °F [°C]
Rated Power W [kW] or hp [kW]
Number of motors
Coil fin density, fins per inch or coil fin spacing [mm]; Actual fin density or fin spacing shall be within 10% of published values.
Airflow rate, cfm [m3/s]
(1) References: ANSI/AHRI Standard 420 - 2008 Performance Rating of Forced-Circulation Free-Delivery Unit Coolers for Refrigeration.
Operations Manual - Unit Coolers for Refrigeration Certification Program.
Copies of reference documents are available @ www.ahrinet.org.
SSTMA
UNIT COOLERS
Small to medium size unit coolers for freezers, coolers and docks requiring low, medium and
high temperature applications. SSTMA Models offer improved accessibility features, clean
cabinet/pan design and corrosion inhibiting materials of construction.
SSTMA Evaporators are offered with Stainless Steel tube/Aluminum fins with hygienic cabinet
design as standard. SSTMA Evaporators are certified in accordance with the AHRI Unit Coolers
Certification Program, which is based on AHRI Standard 420. Certified units may be found in
the AHRI Directory at www.ahridirectory.org.
SSTLA
PRODUCT COOLERS
Large product coolers for low and medium temperature freezer or cooler applications.
SSTLA Models combine high capacity models with maintenance friendly features for the
best value in large evaporators.
SSTLA Evaporators are available with Stainless Steel tube/Aluminum fins as standard.
SSTLA Models are certified in accordance with the AHRI Unit Coolers Certification Program,
which is based on AHRI Standard 420. Certified units may be found in the AHRI Directory
at www.ahridirectory.org.
SSTXA
LOW PROFILE COOLERS
Small to medium capacity, low profile product coolers for freezers, coolers and docks
requiring low, medium and high temperature applications where height limitations exist.
SSTXA Models offer improved accessibility features, clean cabinet/pan design and
corrosion inhibiting materials of construction.
SSTXA Evaporators are offered with Stainless Steel tube/Aluminum fin construction.
SSTXA Evaporators are certified in accordance with the AHRI Unit Coolers Certification
Program, which is based on AHRI Standard 420. Certified units may be found in the AHRI
Directory at www.ahridirectory.org.
SSTWA
WORKROOM UNITS
Low velocity air units for processing rooms. Units feature stainless construction with hinged
panels for easy access. SSTWA Evaporators are designed to provide working comfort in high
occupancy rooms.
SSTWA Evaporators are offered with Stainless Steel tube/Aluminum fins as standard.
SSTWA Workroom Units are outside the scope of the AHRI Unit Coolers Certification Program,
but are rated in accordance with AHRI Standard 420.
SSTDA
LOW PROFILE DUAL COIL COOLERS
Dual coil models for low, medium and high temperature applications in rooms with low
ceiling height requirements. SSTDA Models feature a unique clean cabinet/pan design
available in durable materials of construction.
SSTDA Evaporators are offered with Stainless Steel tube/Aluminum fins as standard.
SSTDA Dual Coil Low Profile Coolers are outside the scope of the AHRI Unit Coolers
Certification Program, but are rated in accordance with AHRI Standard 420.
Benefits of AHRI Unit Cooler Certification Program
䡲
䡲
䡲
䡲
Participating Evaporator Manufacturer’s Rate Products Using the Same Method
Competitive Products and Equipment Proposals Easier to Evaluate
Independent, Third-Party Verification of Published Thermal Performance & Power Ratings
Participating Manufacturers Must Rate All of their Evaporator Products in Accordance with Standard 420 (Even
Those Models Not Covered by the Scope of the AHRI Certification Program)
䡲 Specifying Engineers & Design-Build Contractors can Confidently Select the Optimum Evaporator to Meet the
Thermal Performance and Power Requirement Using Equipment Selection Software which has been Verified by AHRI
䡲 End-users can Accurately Evaluate their “Return on Investment”
E VA P C O P R O D U C T S
ARE
M A N U FA C T U R E D W O R L D W I D E .
W
World
Headquarters/
Research and
R
Development Center
D
EVAPCO Facilities
EVAPCO, Inc. — World Headquarters & Research/Development Center
EVAPCO, Inc. • P.O. Box 1300 • Westminster, MD 21158 USA
PHONE: 410-756-2600 • FAX: 410-756-6450 • E-MAIL: marketing@evapco.com
EVAPCO North America
EVAPCO Europe
EVAPCO, Inc.
World Headquarters
P.O. Box 1300
Westminster, MD 21158 USA
Phone: 410-756-2600
Fax: 410-756-6450
E-mail: marketing@evapco.com
EVAPCO Northwest
5775 S.W. Jean Road, Suite 104
Lake Oswego, Oregon 97035 USA
Phone: 503-639-2137
Fax: 503-639-1800
EVAPCO East
5151 Allendale Lane
Taneytown, MD 21787 USA
Phone: 410-756-2600
Fax: 410-756-6450
E-mail: marketing@evapco.com
EVAPCO Newton
701 East Jourdan Street
Newton, IL 62448 USA
Phone: 618-783-3433
Fax: 618-783-3499
E-mail: evapcomw@evapcomw.com
EVAPCO Midwest
1723 York Road
Greenup, IL 62428 USA
Phone: 217-923-3431
Fax: 217-923-3300
E-mail: evapcomw@evapcomw.com
EVAPCO-BLCT Dry Cooling, Inc.
981 US Highway 22 West
Bridgewater, New Jersey 08807 USA
Phone: 1-908-379-2665
E-mail: info@evapco-blct.com
EVAPCO West
1900 West Almond Avenue
Madera, CA 93637 USA
Phone: 559-673-2207
Fax: 559-673-2378
E-mail: contact@evapcowest.com
A wholly owned subsidiary of EVAPCO, Inc.
EVAPCO Iowa
925 Quality Drive
Lake View, IA 51450 USA
Phone: 712-657-3223
Fax: 712-657-3226
EVAPCO Iowa
Sales & Engineering
215 1st Street, NE
P.O. Box 88
Medford, MN 55049 USA
Phone: 507-446-8005
Fax: 507-446-8239
E-mail: evapcomn@evapcomn.com
EVAPCO Asia/Pacific Headquarters
1159 Luoning Rd. Baoshan Industrial Zone
Shanghai, P. R. China, Postal Code: 200949
Phone: (86) 21-6687-7786
Fax: (86) 21-6687-7008
E-mail: marketing@evapcochina.com
EVAPCO Europe, S.r.l.
Via Ciro Menotti 10
I-20017 Passirana di Rho
Milan, Italy
Phone: (39) 02-939-9041
Fax: (39) 02-935-00840
E-mail: evapcoeurope@evapco.it
EVAPCO (Shanghai) Refrigeration
Equipment Co., Ltd.
1159 Louning Rd., Baoshan Industrial Zone
Shanghai, P.R. China, Postal Code: 200949
Phone: (86) 21-6687-7786
Fax: (86) 21-6687-7008
E-mail: marketing@evapcochina.com
Beijing EVAPCO Refrigeration
Equipment Co., Ltd.
Yan Qi Industrial Development District
Huai Rou County
Beijing, P.R. China, Postal Code: 101407
Phone: (86) 10 6166-7238
Fax: (86) 10 6166-7395
E-mail: evapcobj@evapcochina.com
EVAPCO Europe GmbH
Meerbuscher Straße 64-78
Haus 5
40670 Meerbusch, Germany
Phone: (49) 2159-69560
Fax: (49) 2159-695611
E-mail: info@evapco.de
1520 Crosswind Dr.
Bryan, TX 77808 USA
Phone: 979-778-0095
Fax: 979-778-0030
E-mail: rvs@rvscorp.com
EVAPCO Australia (Pty.) Ltd.
34-42 Melbourne Road
P.O. Box 436
Riverstone, N.S.W. Australia 2765
Phone: (61) 2 9627-3322
Fax: (61) 2 9627-1715
E-mail: sales@evapco.com.au
Flex coil a/s
A wholly owned subsidiary of EVAPCO, Inc.
Knøsgårdvej 115
DK-9440 Aabybro Denmark
Phone: (45) 9824 4999
Fax: (45) 9824 4990
E-mail: info@flexcoil.dk
EvapTech, Inc.
A wholly owned subsidiary of EVAPCO, Inc.
8331 Nieman Road
Lenexa, KS 66214 USA
Phone: 913-322-5165
Fax: 913-322-5166
E-mail: marketing@evaptech.com
EVAPCO Composites Sdn. Bhd
No. 70 (Lot 1289) Jalan Industri 2/3
Rawang Integrated Industrial Park
Rawang, Selangor, 48000 Malaysia
Phone: 60 3 6092-2209
Fax: 60 3 6092-2210
EVAPCO S.A. (Pty.) Ltd.
A licensed manufacturer of EVAPCO, Inc.
18 Quality Road
Isando 1600
Republic of South Africa
Phone: (27) 11-392-6630
Fax: (27) 11-392-6615
E-mail: evapco@evapco.co.za
Tower Components, Inc.
A wholly owned subsidiary of EVAPCO, Inc.
5960 US HWY 64E
Ramseur, NC 27316
Phone: 336-824-2102
Fax: 336-824-2190
E-mail: mail@towercomponentsinc.com
EvapTech Asia Pacific Sdn. Bhd
A wholly owned subsidiary of EvapTech, Inc.
Evap Egypt Engineering Industries Co.
A licensed manufacturer of EVAPCO, Inc.
5 El Nasr Road
Nasr City, Cairo, Egypt
Phone: 2 02 24022866 /2 02 24044997
Fax: 2 02 24044667/2 02 24044668
E-mail: Primacool@link.net / Shady@primacool.net
EVAPCO...SPECIALISTS IN HEAT TRANSFER
PRODUCTS AND SERVICES.
3M/08-13/DGD
EVAPCO Europe BVBA
European Headquarters
Industrieterrein Oost 4010
3700 Tongeren, Belgium
Phone: (32) 12-395029
Fax: (32) 12-238527
E-mail: evapco.europe@evapco.be
EVAPCO Europe, S.r.l.
Via Dosso 2
23020 Piateda Sondrio, Italy
Refrigeration Valves &
Systems Corporation
Visit EVAPCO’s Website at:
EVAPCO Asia/Pacific
B-6-1, IOI Boulevard
Jalan Kenari 5, Bandar Puchong Jaya
47170 Puchong, Selangor Darul Ehsan
Malaysia
Phone: (60-3) 8070-7255
Fax: (60-3) 8070-5731
E-mail: marketing-ap@evaptech.com
http://www.evapco.com
Bulletin 414-CERT
©2013 EVAPCO, Inc.
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