Russell RDD030E2B12A2A User Manual
REMOTE
AIR COOLED
CONDENSER
Publication RU-RDS-0612A
June, 2012
Description:
Russell’s Remote Air Cooled Condensers are designed to provide a wide array of solutions focusing on performance, energy
efficiency, reduced sound output and other requirements of today’s demanding marketplace. Working closely with market leading
customers to solve real world problems, Russell incorporates the wisdom of lessons learned into its design philosophies resulting in
products that exceed the needs of the grocery, supermarket, industrial cooling and commercial warehousing industries.
Standard Features:
• Direct drive motor arrangement
• Vertical or horizontal air flow
• 1140, 850, 550 RPM or Variable Speed EC (VSEC) motors
• Reduced decibel ratings from slower speed or VSEC motors
• Motors have inherent thermal overload protection
• High efficiency Copper tube, Aluminum fin coils
• Leak tested at 450 PSIG
• Reduced refrigerant charge requirements
• Vinyl coated heavy gauge steel fan guards for long life
• Heavy gauge galvanized steel construction for superior
corrosion resistance (other materials and coatings optional)
• Internal dividers isolate each fan cell
Options:
• Fan cycling head pressure control (Ambient or Pressure)
• Flooded head pressure control
• Sub-cooling circuit
• Multi-sectioned coils
• Copper fins
• Wide selection of coated coils for corrosion protection
• Through-the-door disconnect switch
• Individual motor fusing
• Individual or paired motor contactors
• Control board with or without transformer
• Variable frequency drives
• Variable speed header end fan (not available with VFD’s or
VSEC motors)
• Hinged venturi panels
• Removable side access panels
• Extended condenser legs
201 Thomas French Drive Scottsboro AL, 35769 • Tel (714) 529-1935 • FAX (714) 529-7203
http://russell.htpgusa.com
MultiCon
Nomenclature
Table of Contents
Nomenclature 2
Standard Features and Options 3
Condenser Selection 4-9
Performance and Specifications
Variable Speed EC Models 10-11
1140 RPM Models 12-13
850 RPM Models w/ 0.33HP or 1-1/2HP motors 14-15
850 RPM Models w/ 1HP motors 16-17
550RPM Models 18-19
Dimensional drawings 20
2
R D S 082 G B 5 B 1 2 A 1 A
I II III IV V VI VII VIII IX X XI XII XIII
I. Model Series IX. Coil Material and Coating Options
R – Russell 1 – Aluminum fins (Al)
II. Unit type 3 – Al + AST coating
D – Condenser 4 – Al + Blygold
III. Series 6 – Al + Heresite
S – Single fan wide 7 – Al + Polyester coat - Pre Coated Fin Material
D – Double fan wide X – Other
IV. Capacity – Three Number Characters X. Housing Material and Coatings
V. Voltage Code 2 – Galvanized
A – 115/1/60 M – 200-220/1/50 4 – Pueblo Tan pre-paint
D – 208-230/1/60 N – 200-220/3/50 7 - Stainless Steel 316L
E – 208-230/3/60 P – 380/1/50 X – Other
F – 460/1/60 Q – 380/3/50
G – 460V/3/60 T – 380/3/60 XI. Unit Design Configuration
H – 575/1/60 X – Other A – Vertical Fan Discharge, Standard Legs
J – 575V/3/60 B– Vertical Fan Discharge Floating Coil, Standard Legs
VI. Motor/Fan Type D– Vertical Fan Discharge Floating Coil, Legs at every location
A – 1140 RPM, 0.33 HP, Metal Blade E – Vertical Fan Discharge,30” Extended Legs
B – 1140 RPM, 1.5 HP, Metal Blade F– Vertical Fan Discharge Floating Coil, 30” Extended Legs
C – 850 RPM, 0.25 HP, Metal Blade G – Vertical Fan Discharge,48” Extended Legs
D – 850 RPM, 1.5 HP, Metal Blade H– Vertical Fan Discharge Floating Coil, 48” Extended Legs
E – 550 RPM, 1/3 HP, Metal Blade J – Vertical Fan Discharge,60” Extended Legs
F – 550 RPM, 1/3 HP, FB2 K– Vertical Fan Discharge Floating Coil, 60” Extended Legs
G – 900 RPM, 1.5 HP, Variable Speed EC Motor and Fan Assembly L – Vertical Fan Discharge,72” Extended Legs
H –1140 RPM, 0.5 HP Totally Enclosed, Metal Blade M – Vertical Fan Discharge Floating Coil, 72” Extended Legs
J – 1140 RPM, 1.5 HP Totally Enclosed, Metal Blade N – Horizontal Fan Discharge,
L – 850 RPM, 1.0 HP, Metal Blade P – Horizontal Fan Discharge, Floating Coil
X – Other Q – Vertical Fan Discharge, 21” Extended Legs
VII. Length in Fans – A number between 1 and 7 S – Vertical Fan Discharge, 21" Legs at every location
VIII. Coil Density XII. Circuit Splitting Options
A – 8 fpi 1 – Full
B – 10 fpi 2 – 50-50
C – 12 fpi 3 – 50-25-25
D – 14 fpi 4 – 25-25-25-25
X – Other X – Other
2 – Copper fins (Cu)
Post Coat
5 – Al + Bronze Glow
1 – Aluminum
C – Vertical Fan Discharge, Legs at every location
R– Vertical Fan Discharge Floating Coil, 21” Extended Legs
T– Vertical Fan Discharge Floating Coil, 21" Legs at every location
X – Other
XIII. Revision Code – Single Alphanumeric Character
A – Initial Release
Materials
3
Standard and Optional Features
DESCRIPTION
General Construction and Configuration
Vertical Air Discharge Configuration D Std Std
Horizontal Air Discharge Configuration D,G Opt Opt
Galvanized Steel Frame and Casing Std Std
Aluminum Casing Opt Opt
White painted Galvanized Steel Casing Opt Opt
Pueblo Tan pre-paint Galvanized Steel Casing Opt Opt
AST Coated Galvanized Casing Opt Opt
Stainless Steel 304 Casing Opt Opt
Stainless Steel 316 Casing Opt Opt
Heavy Gauge Galvanized Steel Legs (Vert. Disch): Leg Length 15" (Std) 18" (Std)
Condenser Coil
Heavy Gauge Aluminum Tube Sheets Std Std
Copper Tubes Mechanically Expanded into Aluminum Fins Std Std
Special Fin Materials: Copper Fin Stock Opt Opt
Aluminum Fins with AST ElectroFin
Floating coil design Opt Opt
Multi-Sectioning (No extra Charge) B Opt Opt
Sub-Cooling Circuits (No extra Charge) Opt Opt
Fan Section
6-Pole (1140 RPM), 1-Phase or 3-Phase Fan Motors: Open Type E Std Std
8-Pole (850 RPM), 1-Phase or 3-Phase Fan Motors Open Type F Opt Opt
Variable-Speed Fan Motors on Header End - See Control Panel Options C Opt Opt
Fan Motor Mounting: Welded heavy gauge rod mounting frames G Std Std
Models with Motor code G include Variable Speed EC motor and fan assemblies N/A Std
Fully Baffled Fan Modules Std Std
Flip Top' Hinged Fan Panels - Access for Coil Cleaning and Fan/Motor Service G Opt Opt
Side Access Panels - for Ease of Coil Cleaning N/A Opt
Gravity Dampers G Opt Opt
Control Panel
Mounting Location: Opposite Header End Std Std
Temp. or Press. Fan Cycling - Individual or Paired-Fan Contactors (Must specify) G Opt Opt
Custom Fan Cycling Wiring and Logic Opt Opt
Variable Speed Control: Penn P-66 Pressure Controlled C, G Opt Opt
Output Relay Boards for Computerized Fan Cycling (Computer control by others) Opt Opt
Analog output board (for units with Variable Speed EC motors) Opt Opt
Motor Fusing - Individually or in Pairs Opt Opt
Circuit Breakers Opt Opt
Fan Control Circuit Toggle Switches Opt Opt
Control Transformer Opt Opt
Fused or Non-Fused Disconnect Switch (Mounted) Opt Opt
VFD - Not available for models with Variable Speed EC Motors
Refrigerant Specialties
Flooded-Condenser Control Valve System Opt Opt
Field Manifold Kit
Shipping
Vertical Discharge Models
Small Style Condensers D See note D N/A
Large Style Condensers - Legs collapsed for shipping, must extend during installation N/A Std
Horizontal Discharge Models
Legs Disassembled - Unit is Cartoned or Crated D See note D Std
Notes:
A. Contact factory
B. All double fan-width units are two-section as standard. Requires field manifold kit for single-section operation.
C. Header-End (lead fans) only.
D. Legs are disassembled for small condenser models. Units are shipped in carton or crate. Models thru size 011 can be mounted in either horizontal
or vertical configuration depending on method of leg assembly. Consideration must be given to the electrical box when mounted for horizontal air discharge.
Large style condensers must be special ordered for use in horizontal discharge arrangement.
E. 1140 RPM Single phase motors available for sizes up to 022 only.
F. 850 RPM single phase motors available for small condensers thru size 009 only.
G. Not available for units with EC motors
Polyester-Coated Fin Stock Opt Opt
TM
, Heresite, Bronze Glow or Blygold Coated Coils
Header end, Left or Right Side Opt Opt
21", 30", 48", 60" or 72" A N/A Opt
Totally Enclosed E Opt Opt
Notes Small Models Large Models
B Opt Opt
UNIT MODEL
001 to 011 008 to 250
Opt Opt
SELECTION EXAMPLE
Given:
Ambient Air Temperature = 95° F
Maximum Condensing Temperature = 110° F
Evaporator Temperature = 20° F
Refrigerant = R-404A
Compressor Capacity = 290,000 BTU
Compressor Type = Suction Cooled Semi-Hermetic
Solution:
Multiply the compressor capacity by the heat of compression factor to calculate the required total heat of rejection (THR). Table 1 shows that for 110°F
condensing temperature and 20° F evaporator temperature, the heat of compression factor is 1.33. The required total heat rejection (THR) is:
290,000 x 1.33 = 385,700 BTUH THR
Divide the BTUH THR by the design condensing temperature of 15°F TD. (TD = Condensing Temperature - Ambient Temperature)
385,700 ÷ 15 = 25,713 BTUH per 1°F TD
Convert BTUH to MBH.
25,713 BTUH ÷ 1000 = 25.713 MBH per 1°F TD
The correct selection of a single fan width unit with 1140 RPM fan motors (page 12) is a model RDS048*B3 with a capacity of 26.0 MBH @ 10FPI.
Since the unit selection will almost never have the exact required capacity, the actual TD will vary slightly from the design TD. The actual TD can be
calculated using the following formula:
Actual TD =
Design THR
x Design TD
Actual Condenser THR
For this example the actual TD would be:
Actual TD =
25.7
x 15 = 14.8°F TD
26.0
Condenser Selection
Air-cooled condenser capacity ratings are based on the total heat rejection of the refrigeration system. Total heat of rejection is the sum of the net
refrigeration effect and heat of compression added to the refrigerant in the compressor.
The heat of compression varies with the compressor design, so the compressor manufacturer's information should be used whenever possible. If the
compressor manufacturer's heat of compression information is not available, Tables 1 and 2 (page 5) may be used to determine the heat of compression.
The following formulas may be used to calculate the total heat rejection (THR) for systems that fall outside the normal limits of single stage compressor
applications, such as compound or cascade systems.
Suction cooled hermetic compressors:
THR = Compressor Capacity (BTUH) + (3413 x KW)
Open Compressors
THR =Compressor Capacity (BTUH) + (2545 x BHP)
ELEVATION CORRECTION
Elevation above sea level has an effect on the performance of air cooled condensers. Divide the required capacity by the Elevation Correction Factor in
the table on page 5 to correct the requirement to Sea Level Conditions. The proper condenser can then be selected from the appropriate table on Pages
10,12,14,16 or 18.
SINGLE SECTION CONDENSERS
All units are available for single section applications. All double fan width units are furnished with dual section coils and can be converted in the field for
single section installations.
4
Table 1: Heat of Compression Factors
5
Suction Cooled Compressors
Evap
Temp
°F 90 95 100 105 110 115 120 125 130
-40 1.66 1.70 1.73 1.76 1.80 1.90 2.00 † †
-35 1.61 1.64 1.68 1.70 1.74 1.82 1.90 † †
-30 1.57 1.60 1.62 1.65 1.68 1.74 1.80 † †
-25 1.53 1.56 1.58 1.60 1.63 1.67 1.72 † †
-20 1.49 1.51 1.53 1.55 1.58 1.61 1.65 † †
-15 1.46 1.48 1.50 1.51 1.54 1.57 1.61 † †
-10 1.42 1.44 1.46 1.48 1.50 1.53 1.57 1.60 1.64
-5 1.39 1.41 1.43 1.45 1.47 1.50 1.53 1.56 1.60
0 1.36 1.38 1.40 1.42 1.44 1.47 1.50 1.53 1.56
+5 1.33 1.35 1.37 1.39 1.41 1.43 1.46 1.49 1.52
+10 1.31 1.32 1.34 1.36 1.38 1.40 1.43 1.46 1.49
+15 1.28 1.30 1.32 1.33 1.35 1.37 1.40 1.43 1.46
+20 1.26 1.27 1.29 1.31 1.33 1.35 1.37 1.40 1.43
+25 1.24 1.25 1.27 1.29 1.31 1.33 1.35 1.37 1.40
+30 1.22 1.23 1.25 1.26 1.28 1.30 1.32 1.34 1.37
+35 1.20 1.21 1.23 1.25 1.26 1.27 1.29 1.31 1.34
+40 1.18 1.19 1.21 1.23 1.24 1.25 1.27 1.29 1.31
+45 1.16 1.17 1.19 1.21 1.22 1.23 1.25 1.26 1.28
+50 1.14 1.15 1.17 1.19 1.20 1.22 1.23 1.24 1.26
† Beyond the normal limits for single stage compressor application.
Condensing Temperature °F
Table 2: Heat of Compression Factors
Open Compressors
Evap
Temp
°F 90 95 100 105 110 115 120 125 130
-30 1.37 1.39 1.42 1.44 1.47 ††††
-20 1.33 1.35 1.37 1.39 1.42 1.44 1.47 † †
-10 1.28 1.30 1.32 1.34 1.37 1.39 1.42 1.44 1.47
0 1.24 1.26 1.28 1.30 1.32 1.34 1.37 1.39 1.41
+10 1.21 1.23 1.24 1.26 1.28 1.30 1.32 1.34 1.36
+20 1.17 1.18 1.20 1.22 1.24 1.26 1.28 1.30 1.32
+30 1.14 1.15 1.17 1.18 1.20 1.22 1.24 1.25 1.27
+40 1.12 1.14 1.15 1.16 1.17 1.18 1.20 1.21 1.23
+50 1.09 1.11 1.12 1.13 1.14 1.16 1.17 1.19 1.20
† Beyond the normal limits for single stage compressor application.
Condensing Temperature °F
Table 3: Elevation Correction Factors
Elevation (ft) 1000 2000 3000 4000 5000 6000 8000 1000 12000 14000 16000
Correction Factor 0.94 0.93 0.90 0.88 0.86 0.83 0.79 0.75 0.71 0.66 0.62
Multi-Section Condensers
Air-cooled condensers with more than one section are available for applications where multiple refrigeration systems are connected to the same
condenser. Multi-sectioning, except for small condensers, is covered in this section.
The condenser coil is divided into the proper number of sections and each section is supplied with an inlet and outlet connection. Each section is tagged
for identification. When ordering, the sections must be placed in numerical sequence. The sections will be arranged in sequence with the number one
section being on the left end when facing the header end of the unit.
Example: Multi-Section Condenser Selection
Given:
Refer to Table 4, the Multi-Section Calculation Form below. Four suction cooled semi-hermetic compressors are shown with their operating conditions.
Design ambient temperature is 95° F.
Procedure:
1. Complete the customer data in columns 1 through 6 in Table 4.
2. Fill in the heat of compression factors in column 7. If the compressor manufacturer's data is not available, use values from tables 1 and 2.
3. Multiply the values in column 6 by the values in column 7 and tabulate the results in column 8.
4. Next, divide the heat rejection values in column 8 by the design TD values in column 3 and enter the results in column 9.
5. Add all of the items in column 9 to obtain the total MBH required at 1° F TD. Use this value and the procedure on Page 4 to select
the proper condenser model. For this example, the total MBH is 25.64. Therefore, the unit with 1140 RPM fan motors and
double fan-width configuration, having enough capacity to meet this requirement, is an RDD041*B2 with 14 FPI.
6. MBH per face tube values can be found by dividing the unit’s capacity, found in the performance data tables, by the number of face tubes listed
in Table 5. Be sure to apply the corresponding correction factors for refrigerants other than R-404A or R-407A. Enter the MBH per face tube value
in column 10.
For Sections No. 1 & 2 in Table 4, the unit’s capacity can be found by multiplying the R-22 correction factor (1.02) by the value in the R-404A table (26.1)
on page 12. Divide this capacity by the number of face tubes available for the RDD041*B2 listed in Table 5.
MBH per face tube = = 0.370
7. To determine the number of face tubes required for each section, divide column 9 by column 10 and enter the results in column 11.
8. Each section's number of face tubes in column 11 is a mathematical value and must be rounded off to a whole number and entered into column 12.
Round each number off such that the section size assigned to each system is no smaller than 10% undersized.
9. Total the values in column 12. The sum must equal the number of face tubes available for the RDD041*B2 as shown in Table 5. If it does not, one
or more of the column 12 numbers will have to be adjusted so the sum does equal the available face tubes.
10. The actual TD in each coil section may vary slightly from the design TD. The actual TD can be calculated using the following formula:
The actual TD for Section No. 3 would be:
26.1 x 1.02
72
TD =
Design TD x adjusted THR @ 1° TD
MBH per tube @ 1° TD x No. of Tubes used
TD =
10 x 4.98
0.363 x 15
= 9.1°F
6
Table 4: Multi-Section Calculation Form
123456 789101112
Section
Refrig.
Type
Design TD
(°F)
No.
1 22 15 110 20 96.5 1.33 128.3 8.56 0.370 23.13 24
2 22 15 110 20 81.1 1.33 107.9 7.19 0.370 19.43 20
3 404 10 105 -25 31.1 1.6 49.8 4.98 0.363 13.71 14
4 404 10 105 -25 28.9 1.7 49.1 4.91 0.363 13.53 14
Cond. Temp.
(°F)
Evap. Temp.
(°F)
Compressor
Capacity
(MBH)
Heat of
Compression
Factor
Heat
Rejection
Adjusted
THR (MBH)
1°F TD
MBH Per
Face Tube
No. of Face
Tubes
Required
No. of Face
Tubes
Selected
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