Baltimore
Aircoil
HXV
Closed Circuit Hybrid
Cooling Towers
Technical Data Supplement
HXV-64X/Q64X
(4) 4" BFW FLUID IN
(4) 4" BFW FLUID IN
(4) 4" BFW FLUID OUT
(4) 4" BFW FLUID OUT
AIR
HXV 64x
AIR
HXV Q64x
INLET
F
INLET
3" OVERFLOW
11 1/2"
8'-8 3/4"
22'-3 1/8"
F
6" BFW FLUID IN
ACCESS DOOR
(THIS END ONLY)
ACCESS DOORS
THIS SIDE ONLY
2'-7 1/2"
A
ACCESS DOOR
(THIS END ONLY)
6" BFW FLUID OUT
A
(2) 4" BFW FLUID IN
8'-8 3/4"
22'-3 1/8"
(2) 4" BFW FLUID OUT
2" DRAIN
1" MAKE UP
2'-8 3/8"
6"
11'-10"
1'-8 1/4"
12'-1 1/4"
2'-2 1/4"
2'-7 1/8"
3"
2'-2 3/8"
3'-2 3/8"
11'-10"
HXV-66X/Q66X
(4) 4" BFW FLUID IN
(4) 4" BFW FLUID IN
(4) 4" BFW FLUID OUT
(4) 4" BFW FLUID OUT
AIR
AIR
HXV Q66x
INLET
INLET
F
HXV 66x
22'-8 5/8"
F
3" OVERFLOW
3'-1"
ACCESS DOOR
(THIS END ONLY)
A
8" BFW FLUID IN
9'-2 1/4"
22'-8 5/8"
A
9'-2 1/4"
ACCESS DOOR
(THIS END ONLY)
ACCESS DOORS
THIS SIDE ONLY
8" BFW FLUID OUT
(2) 4" BFW FLUID IN
1'-5"
(2) 4" BFW FLUID OUT
2" DRAIN
2'-2 3/8"
3'-2 3/8"
2'-8 3/8"
11'-10"
6"
2'-0 3/8"
18'-1 1/4"
2'-2 1/4"
2'-7 1/8"
11'-10"
8 1/2"
1" MAKE UP
Notes:
1. Pipe sizes are nominal diameters. Standard connections are beveled-for-welding (BFW). Male threaded
(MPT), grooved, and flanged connections are available as options.
2. Dimensional drawings show standard (right hand) arrangements with the standard finned coil arrangement.
Left hand arrangement can be furnished by special order.
3. Coil connection locations are approximate. Dimensions should not be used for prefabrication of the
connecting piping.
4. The engineering table on page 3 reflects the quantity and nominal diameter of the inlet and outlet coil
connections.
5. Two finned coil circuiting arrangements are available (refer to pages 4 and 5 for description).
6. All technical information on this page is without manifolds and three-way valve arrangement. (Refer to
pages 5 and 6 for manifold and three-way valve arrangement).
7. The units will be delivered in 3 different pieces, upper, middle and lower section for easy field assembly.
CAUTION:
Do not use for construction, refer to Factory Certified Dimensions. In the interest of product
improvement, specifications and dimensions are subject to change without notice.
Engineering Data
MODEL
STANDARD
FAN
MOTOR
AIRFLOW
HP
CFM
WEIGHT (LB)
PUMP
MOTOR
HP
SPRAY
PUMP
GPM
APPROX.
SHIPPING
INLET/OUTLET COIL CONNECTIONS
APPROX.
OPER.
HEAVIEST
SECTION
(MIDDLE)
PRIME
SURFACE
COIL
FINNED
COIL
A
F
HXV-641-OM
30
83,060
5
715
15,100
23,700
6,800
(2) 4"
(4) 4"
14' 2"
2' 0"
HXV-642-OM
HXV-Q640-OM
HXV-Q641
30
30
30
82,001
82,001
80,094
5
5
5
715
715
715
16,200
16,200
18,200
25,200
25,200
28,200
7,800
7,800
9,900
(2) 4"
(1) 6"
(1) 6"
(4) 4"
(4) 4"
(4) 4"
14' 2"
14' 1"
14' 1"
2'-91⁄4"
2'-73⁄8"
4'-17⁄8"
126,073
124,166
124,166
121,624
7.5
7.5
7.5
7.5
900
900
900
900
21,700
23,200
23,200
26,400
34,600
36,900
36,900
41,300
9,700
11,300
11,300
14,500
(2)
(2)
(1)
(1)
(4)
(4)
(4)
(4)
14'-71⁄2"
14'-71⁄2"
14'-51⁄2"
14'-51⁄2"
2' 0"
2'-91⁄4"
2'-53⁄8"
3'-117⁄8"
HXV-661-OM
HXV-662-OM
HXV-Q660-OM
HXV-Q661
30
30
30
30
&
&
&
&
15
15
15
15
4"
4"
8"
8"
4"
4"
4"
4"
UNIT SELECTION
Please consult your local BAC Representative for the most suitable HXV selection for the required application.
ENGINEERING DATA
COIL AND PAN VOLUMES AND WINTER OPERATION
COIL VOLUMES
HXV MODEL
NO.
HEAT LOSS DATA
(BTU/HR)
STANDARD UNIT
ELECTRIC
IMMERSION
HEATERS
(KW) AT 0OF
PRIME SURFACE COIL
(GALLON)
FINNED
COIL
(GALLON)
PAN VOLUME
AT OPERATING
LEVEL
(GALLON)
HXV-641-OM
904,180
HXV-642-OM
962,184
12
163
119
207
12
218
119
207
HXV-Q640-OM
HXV-Q641
HXV-661-OM
962,184
12
218
119
207
1,074,780
1,354,564
12
16
326
255
119
170
207
314
HXV-662-OM
HXV-Q660-OM
HXV-Q661
1,436,452
1,436,452
1,596,816
16
16
16
340
340
510
170
170
170
314
314
314
Notes:
1. Heat loss data based on 50°F coil water and –10°F with 45 m.ph. wind velocity
(fans and pump are off).
2. Electric immersion heaters with thermostat and low level cut out. All components are factory
installed in the unit basin. Heaters are selected to maintain 40°F pan water at 0°F ambient
temperature. In outdoor location trace heating and insulation of spray pump(s) (by others) may
be required for freeze protection.
WARNING:
HXV Closed Circuit Hybrid Cooling Tower’s coils must be protected from damage by freezing of the
fluid inside the coils when exposed to subfreezing conditions. Freeze protection can be obtained by the
use of ethylene or propylene glycol or other anti-freeze solutions in appropriate concentrations. If no antifreeze solution can be used, refer to the heat loss data hereunder and to the section “Winter Operation” of
the HXV Operating and Maintenance Instructions BAC Bulletin M248.
UNIT CONTROL SEQUENCE
Please consult your local BAC Representative for the unit control sequence information.
FINNED COIL SERPENTINE ARRANGEMENT
(only available on the finned coil)
Description:
The standard finned coil on the HXV unit has 6 rows. The serpentine arrangement indicates the way in which
these rows are circuited internally and influences the process fluid velocity (the smaller the serpentine, the
higher the flow velocity) and the total fluid pressure through over the unit (the smaller the serpentine, the higher the finned coil pressure drop). Hence, the unit flow and pressure drop allowance must be taken into account
when the finned coil serpentine is selected to obtain the most suitable HXV selection.
External finned coil arrangement:
For both the 11⁄2 serpentine and triple serpentine, the finned coil inlet and the outlet connections are on the
same side of the unit.
11⁄2 Serpentine and Triple Serpentine
4'-11 3/4"
4'-3 1/2"
4'-11 3/4"
4'-3 1/2"
1'-7 1/4"
1'-7 1/4"
FLUID OUT
(4) FLUID OUT
THREE WAY VALVE ARRANGEMENT
Single Prime Surface Coil Connections
FLUID IN
FLUID OUT
(4) FLUID IN
3 1/4"
FLUID IN
11"
6 1/2"
11"
Double Prime Surface Coil Connections
FLUID IN
FLUID OUT
PRESSURE DROP CALCULATION
Water:
Enter the coil pressure drop tables at the selected model, proceed horizontally to the flow column closest to the
actual water flow. Read the pressure drop at the intersection of the model number and the flow rate column.
Interpolate if necessary. The maximum coil pressure drop for the unit is the summation of these three values.
Ethylene/Propylene Glyvol Solutions:
The coil pressure drop tables for water can be used for ethylene glycol or propylene glycol if the flow rate is
first multiplied by the appropriate flow factor (see table 4 on page 6) before entering the pressure drop table.
Table 1. HXV and HXV-Q Pressure Drop (psi) Finned Coil (only)*
HXV
MODEL
SERPENTINE *
ARRANGEMENT 300 350 400 450 525 600 675 750
HXV-64X
825
900
7.6
9.0
10.5 12.1 13.9
2.6
3.2
3.8
4.4
8.1
9.8 11.7 13.6 15.8 18.0
20.4 22.9
3.0
3.6
7.6
1
1 ⁄2
1.5 1.9 2.4 3.0 4.0 5.1
6.3
HXV-Q64X
3
0.6 0.8 1.0 1.2 1.7 2.1
HXV-66X
11⁄2
1.9 2.5 3.2 3.9 5.2 6.6
HXV-Q66X
3
0.7 0.9 1.2 1.5 1.9 2.5
4.4
5.1
975
5.1
5.9
1050 1125 1200
5.8
6.7
15.7 17.6
6.6
7.4
8.5
* See page 4 for more information regarding serpentine arrangement.
Table 2. HXV and HXV-Q Pressure Drop (psi) Prime Surface Coil (only)
HXV
MODEL
300
350
400
450
525
600
675
750
825
900
975
1050
1125
1200
HXV-641-OM
1.5
2.0
2.5
3.1
4.1
5.2
6.4
7.7
9.2
10.7
12.4
14.2
16.0
18.0
HXV-642-OM
1.9
2.5
3.2
3.9
5.2
6.6
8.1
9.8
11.6
13.6
15.7
18.0
20.3
22.8
HXV-Q640-OM
0.4
0.6
0.7
0.9
1.2
1.5
1.8
2.2
2.6
3.0
3.5
4.0
4.5
5.1
HXV-Q641
0.5
0.7
0.9
1.1
1.5
1.9
2.4
2.9
3.4
4.0
4.6
5.2
5.9
6.6
HXV-661-OM
2.0
2.7
3.4
4.2
5.6
7.1
8.8
10.6
12.6
14.7
17.0
19.4
22.0
24.7
HXV-662-OM
2.7
3.6
4.5
5.6
7.4
9.4
11.6
14.1
16.7
19.5
22.6
25.8
29.2
32.8
HXV-Q660-OM
0.4
0.5
0.7
0.8
1.1
1.4
1.8
2.1
2.5
3.0
3.4
3.9
4.4
5.0
HXV-Q661
0.6
0.7
1.0
1.2
1.6
2.0
2.4
3.0
3.5
4.1
4.7
5.4
6.1
6.9
Table 3. HXV - Pressure Drop (psi) Three Way Valve BAC Supply (only)
VALVE
SIZE
300
350
400
450
525
600
675
750
825
900
975
1050
ND 3
ND 4
6.9
2.7
9.4
3.7
12.3
4.8
15.6
6.1
21.2
8.3
27.1
10.8
35.1
13.7
16.9
20.5
24.4
28.6
33.2
ND 5
ND 6
1.5
0.7
2.0
0.3
2.7
1.3
3.4
1.6
4.6
2.2
6.0
2.9
7.6
3.7
9.4
4.5
11.3
5.5
13.5
15.9
7.6
18.4
8.8
6.5
1125
1200
21.1
10.2
24.0
11.5
40%
1.038
50%
1.044
Propylene Glycol Correction Factor
1.020
1.039
1.058
1.062
1.089
AIR
UNIT SUPPORT
UNIT OUTLINE
7/8" MOUNTING HOLES
HXV 66x
HXV Q66x
A
UNIT
HXV 64x
HXV Q64x
W
30%
1.029
1 1/8"
20%
1.020
AIR
10%
1.010
INLET
PERCENT SOLUTION
Ethylene Glycol Correction Factor
INLET
Table 4. Pressure Drop Flow Factors for Ethylene Glycol Solutions
C
B
C
B
L
L
W
L
A
B
C
NO. OF
STANDARD 7/8"
ANCHOR BOLTS
HXV-64X
1
⁄2"
11'-10"
12'-11⁄4"
11'-73⁄4"
10'-51⁄4"
10"
4
HXV-Q64X
HXV-66X
HXV-Q66X
1
⁄2"
1
⁄2"
1
⁄2"
11'-10"
11'-10"
11'-10"
12'-11⁄4"
18'-11⁄4"
18'-11⁄4"
11'-73⁄4"
11'-73⁄4"
11'-73⁄4"
10'-51⁄4"
8'
8'
10"
105⁄8"
105⁄8"
4
8
8
HXV
MODEL
MAX.
DEFLECTION
(INCH) (4)
C
B
1 1/8"
4"
C
Notes:
1. Support beams and anchor bolts to be selected and installed by others.
2. All support steel must be level at top.
3. Beams must be selected in accordance with accepted structural practice.
4. Maximum deflection is for units with water level in basin at overflow.
5. Consult your B.A.C. Representative for detailed support drawing before selecting support beams.
6. Anchorage upgrades are available for wind or seismic requirements. Consult your local BAC Representative
for more information.
P.O. Box 7322, Baltimore, MD 21227
Phone: 410-799-6200 • Fax: 410-799-6416
Web site: http://www.baltimoreaircoil.com