Russell ACE017 User Manual
ACE
ACE
AIR COOLED
CONDENSER
550 RPM / FLYING BIRD 2
Publication 430.0
April 2004
Description:
Russellʼs Remote Air Cooled Condensers are designed to provide the optimum in heat transfer efficiency and are constructed for
years of reliable performance. The large air cooled condenser, now the accepted standard, is more than an assemblage of fans and
coil. It is a highly engineered element of the refrigeration system. The reliability of the system depends as much on the performance
of the condenser as on the performance of the compressor. Only the highest grades of commercially available Aluminum, Copper
and galvanized steel go into the manufacture of each air cooled condenser. To ensure trouble free installation and operation, every
unit must pass the high standards of our Quality Control Program at each stage of production.
Features:
• Direct drive arrangement
• Vertical air flow
• ACE series uses 550 RPM motors, for high performance
• ACE series available with either the patented
Flying Bird 2 assembly or standard metal fan blades
• Reduced decibel ratings from 1140 RPM motors
• Motors have inherent thermal overload protection
• Copper tube, Aluminum finned coils
• Leak tested at 450 PSIG
• Vinyl coated heavy gauge steel fan guards for safety
and long life
• Heavy gauge galvanized steel construction for superior
corrosion resistance
• Custom circuited coils for optimum performance based on
actual application requirements
• UL and cUL Listed
3050 Enterprise St. • P.O. Box 1030 • Brea, CA 92822-1030 • Tel: (714) 529-1935 • Fax: (714) 529-
Options:
• Fan c ycling head pressure control
• Flooded head pressure control
• Sub-cooling circuit
• Multi-circuiting
• Copper fins
• Wide selection of coated coils for corrosion protection
• Through-the-door disconnect switch
• Individual motor fusing
• Individual motor contactors
• Splitting relay
• Control board with transformer
www.russellcoil.com
7203
Nomenclature
AC E 075 B -10 A E
MODEL SERIES
AC - Russell
FAN MOTOR TYPE
E - Extra Low Speed (550 RPM)
NOMINAL CAPACITY
Tons @ 30° TD, R-22
COIL SURFACE
B = 3/8” Tubing
C = 1/2” Tubing
Our New FOURTEEN FAN air cooled condenser on shipping skid.
ELECTRICAL CODE
E - 208-230/3/60
G - 460/3/60
H - 575/3/60
N - 200-220/3/50
Q - 380/3/50
FAN / AIR DISCHARGE
A - Flying Bird 2 / Vertical
C - Flying Bird 2 / Horizontal
V - Standard / Vertical
H - Standard / Horizontal
COIL FIN SPACING
08, 10, 12, 14 FPI
Example of the
Flying Bird 2
impeller.
2 7
The
Flying Bird 2
incorporates many key
features:
• Reduces db levels
• Improved performance
• Configuration up to 14
fans
• Capacity up to 152 tons
at 30°TD
• Non-corrosive durable
injected composite
plastic blades
• Ideal for coastal
applications
units
Selections
For the proper selection of an air cooled condenser it is necessary
to know the total heat rejection of the condenser. The Total Heat
of Rejection (THR) is equivalent to the sum of the Net
Refrigerating Effect (NRE) plus the heat of compression added by
the compressor. The amount of heat added to the refrigerant will
depend on the style of compressor, open or suction cooled, and
the operating conditions of the system.
Whenever the THR values are available from the compressor
manufacturer they should be used in selecting a condenser.
For those cases in which the THR data is unavailable it can be
quickly estimated using the following equation and the appropriate
factor from Tables 1 or 2.
Eq. (1) THR = Compressor Capacity x Heat Rejection Factor
In those cases where the refrigeration system is of a multiple or
cascade style, the following equations should be used to estimate
the total heat of rejection.
Open Compressor
Eq. (2) THR = Compressor Capacity + (2545 x BHP)
Suction Cooled Compressor
Eq. (3) THR = Compressor Capacity + (3413 x KW)
Altitude at which a condenser is to operate will also affect its
capacity. In order to correctly select a condenser at a specific
altitude, use the following equation and the appropriate correction
factor from Table 3.
Eq. (4) THR Corrected =THR Design x Altitude Correction Factor
Selection Example
Given:
Altitude 5000 ft.
Ambient Temperature 100°F
Evaporator Temperature 20°F
Maximum Condensing Temperature 110°F
Refrigerant R-22
Compressor Capacity (NRE) 225,000 BTUH
Compressor Type Suction Cooled
Assume compressor THR is not available
HEAT REJECTION FACTORS
TABLE 1 - OPEN COMPRESSOR
. CONDENSING TEMPERATURE
EVAP
TEMP. 90° 100° 105° 110° 115° 120° 125° 130°
-40° 1.45 1.48 1.52 1.56 1.58 1.61
-35° 1.42 1.45 1.47 1.51 1.54 1.57
-30° 1.39 1.41 1.44 1.47 1.50 1.53
-25° 1.37 1.39 1.41 1.44 1.46 1.49 1.52
-20° 1.34 1.37 1.39 1.41 1.43 1.45 1.48 1.51
-15° 1.31 1.34 1.37 1.38 1.40 1.42 1.45 1.47
-10° 1.28 1.31 1.33 1.37 1.38 1.40 1.42 1.45
Calculate:
1. Total Heat Rejection
2. Design temperature difference
3. Condenser size
4. Actual system TD
5. Actual condensing temperature
Solution:
. Calculate the system THR from Table 2, a suction cooled
1
compressor, at 110°F condensing temperature and 20°F evaporator temperature, will have a heat rejection factor of 1.33.
THR = Compressor Capacity x Heat Rejection Factor
THR = 299,250 BTUH
THR Corrected “Altitude” = THR x Altitude Corr. Factor
THR Corrected “Altitude” = 336,656 BTUH
2. Design TD = Condensing Temp. - Ambient Temp.
Design TD = 10°F
3. Select condenser size:
From page 5 locate double width ACE section of the page.
Then using the TD of 10°F calculated in Step 2, go to the
appropriate column and select a condenser whose THR equals
or exceeds that of which we calculated in Step 1; 336,656
BTUH.
A model ACE075B-08A with a THR of 352,000 BTUH will meet
the required conditions.
4. Eq.(5) Actual TD = Design TD x Design THR
Actual Condenser Capacity at Design TD
Actual TD = 9.6°F
5. Eq.(6) Actual Condensing Temp. = Actual TD + Ambient Temp.
Actual Condensing Temp. = 109.6°F
TABLE 2 - SUCTION COOLED COMPRESSOR
EVAP. CONDENSING TEMPERATURE
TEMP. 90° 100° 105° 110° 115° 120° 125° 130°
-40° 1.67 1.71 1.75 1.79 1.84 1.90
-35° 1.63 1.67 1.70 1.73 1.78 1.83
-30° 1.58 1.62 1.65 1.68 1.72 1.77
-25° 1.54 1.58 1.60 1.64 1.67 1.71 1.76
-20° 1.49 1.53 1.56 1.58 1.63 1.66 1.70 1.75
-15° 1.46 1.50 1.52 1.54 1.58 1.62 1.65 1.69
-10° 1.42 1.46 1.48 1.50 1.53 1.57 1.62 1.64
0° 1.24 1.28 1.29 1.32 1.33 1.35 1.38 1.41
10° 1.21 1.24 1.26 1.28 1.30 1.31 1.34 1.36
20° 1.18 1.21 1.23 1.24 1.26 1.28 1.30 1.32
30° 1.15 1.18 1.20 1.21 1.23 1.24 1.26 1.28
40° 1.13 1.15 1.17 1.18 1.19 1.20 1.22 1.24
50° 1.11 1.13 1.14 1.15 1.16 1.17 1.18 1.20
0° 1.36 1.40 1.42 1.44 1.47 1.50 1.54 1.56
10° 1.31 1.34 1.36 1.38 1.40 1.43 1.47 1.49
20° 1.26 1.29 1.31 1.33 1.35 1.37 1.40 1.43
30° 1.22 1.25 1.26 1.28 1.30 1.32 1.35 1.37
40° 1.18 1.21 1.22 1.24 1.25 1.27 1.30 1.32
50° 1.14 1.17 1.18 1.20 1.21 1.23 1.25 1.27
TABLE 3 - Altitude Correction Factor (ft.)
Altitude Sea Level 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000
Factor 1.0 1.029 1.052 1.076 1.101 1.125 1.151 1.177 1.204 1.231 1.260
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