Witt_Transfer_Dry_Coolers.pdf

Publication No. WT-FSD-1012A

Optional Features:

• Horizontal air discharge confi guration

• Aluminum Casing (galvanized frame and legs)

• Coated or Copper fi ns

• 8 Pole 825 rpm motors

• Flip top hinged fan panels

• Removable side access panels

• Control panel mounting location

• Motor fusing

• Circuit breakers

• Fan control toggle switches

• Fused disconnect switch

Air-Cooled Fluid Cooler

FS/FD Series

Standard Features:

• Vertical air discharge confi guration

• Galvanized steel frame and casing

• Aluminum Fins / Copper tubes

• 6 pole 1140 RPM motors

• Heavy gauge Aluminum Fan blades with steel hub

• Fully baffl ed fan modules

• Weather tight control panel

• Epoxy Coated Fan guards

Consider The Possibilities

• Cools most any non-corrosive fl uid

• Closed-circuit cooling avoids contamination

• Cold weather economizer for interior cooling loads

• HVAC and computer room air conditioning

• Industrial cooling applications

- Cutting fl uids

- Machinery cooling jackets

- Electrical gear

FS/FD Series

.................................................................... 10-11 .........................................................Back Cover

Table of Contents Nomenclature Features and Options Performance Range Tables — 1140 RPM Models Performance Range Tables — 825 RPM Models Fan and Motor Data Sound Pressure Options Electrical Control Options Typical Wiring Diagrams — Single Phase Typical Wiring Diagrams — Three Phase Detail Photographs and Features Weights and Volumes Connection Sizes Fan Motor Amps Dimensional Drawings Standard Specifi cations

Standard and Optional Features

UNIT MODEL

DESCRIPTION Notes FS FS-204A— 603A

101 A— 203 A FD-401B—1203B

General Construction and Configuration Vertical Air Discharge Configuration Std Std

Horizontal Air Discharge Configuration Opt Opt Galvanized Steel Frame and Casing Std Std Embossed Aluminum Casing (Galvanized Steel Frame and Legs) Opt Opt Heavy Gauge Galvanized Steel Legs (Vert. Air Disch): 18" Leg Length 15" (Std) Std

30" or Custom Leg Length A N/A Opt Fluid Cooler Coil

16 Gauge Galvanized Steel Casing and Aluminum Tube Sheets Std Std Aluminum Fins Mechanically Expanded into Copper Tubes Std Std Special Fin Materials: Up to .010" Thick Aluminum Opt Opt

Copper Fin Stock Opt Opt Polyester-Coated Fin Stock Opt Opt

ElectroFin™ and Phenolic-Coated Coils Opt Opt Fan Section

6-Pole (1140 RPM), 1 -Phase (PSC) or 3-Phase Fan Motors: Open Type E Std Std Totaly Enclosed B Opt Opt

Fan Motor Mounting Std Std FS-101A thru 203A — Steel Rail Rigid Mounting Std N/A All Others — Welded heavy-gauge rod mounting frames N/A Std

Fan Blades - Heavy Gauge Aluminum Blades, Painted Steel Hubs Std Std Fully Baffled Fan Modules Std Std 'Flip Top' Hinged Fan Panels - Easy Access for Coil Cleaning and Fan/Motor Service N/A Opt

Control Panel Weather-Tight Galvanized Steel Enclosure with All Motor Leads Pulled C Std Std Mounting Location: Header End Std Std Temperature Fan Cycling - Individual- or Paired-Fan Contactors (Must specify) Opt Opt Custom Fan Cycling Wiring and Logic Opt Opt Motor Fusing - Individually or in Pairs Opt Opt Circuit Breakers B Opt Opt Fan Control Circuit Toggle Switches Opt Opt Control Transformer B Opt Opt Fused Disconnect Switch (Mounted) B Opt Opt

Shipping Vertical Discharge Models FS-101A thru 203A D Std — Vertical Discharge Models All Others — Legs are collapsed for shipping — Std and must be re-extended during installation Horizontal Discharge Models

Legs Disassembled - Unit is Cartoned or Crated See Note D See Note A

Notes A. Contact factory for information B. Not UL Listed C. Units which are fi ve and six fans long are furnished with motor leads wired to 3-Phase Terminal Blocks.

D. Legs disassembled; units shipped in carton or crate. Models FS-101A thru 203A can be either horizontal or vertical depending on method of leg assembly.

E. 1-Phase PSC Motors available on models FS-101A thru 207A only.

FSS

101A 26.8 6.0 10 30.4 3.2 20 102A 42.0 9.2 10 48.0 5.2 20 103A 63.6 14.0 10 84.0 6.4 30 104A 80.0 17.6 10 106.8 4.8 50 201A 100.0 22.4 10 172.4 5.6 70 202A 122.4 27.2 10 213.6 4.8 100 203A 169.2 18.8 20 233.2 3.6 140 204A 182.4 20.4 20 272.8 6.0 100

205A 196.4 22.0 20 306.8 6.8 100 206A 224.4 25.2 20 368.0 5.2 160 207A 238.8 26.8 20 407.2 5.6 160

FSS

208A 261.2 29.2 20 507.6 7.2 160 209A 337.6 25.2 30 545.6 7.6 160 210A 357.2 26.4 30 590.4 6.0 220 211A 395.6 29.2 30 668.9 5.3 280 301A 419.6 31.2 30 826.0 7.2 260 302A 513.6 28.8 40 887.2 5.6 340 303A 535.6 30.0 40 962.8 5.2 400 401A 556.0 30.8 40 1044.4 10.4 220 402A 588.0 32.8 40 1142.4 8.4 300 403A 607.6 34.0 40 1258.4 7.2 380 404A 620.8 34.8 40 1306.4 7.6 380 501A 636.8 35.6 40 1382.8 10.8 280 502A 652.8 36.4 40 1538.0 9.6 360 503A 795.2 35.6 50 1598.4 10.0 360 601A 893.2

1030.4 1181.2

33.2 60 1598.0 13.6 260 602A 32.8 70 1780.4 12.4 320 603A 29.2 90 1852.0 12.8 320

FDS

401 B 470.0 34.8 30 1048.8 10.4 220 402B 590.0 32.8 40 1145.2 8.4 300 403B 623.9 34.8 40 1289.2 5.2 550 404B 637.2 35.6 40 1336.0 5.4 550 601 B 735.2 32.8 50 1643.2 7.2 500 602B 782.0 34.8 50 1730.4 6.8 550 603B 924.4 34.4 60 1847.2 9.2 450 801 B 1010.4 32.0 70 2097.6 10.4 450 802B 1066.4 34.0 70 2256.6 9.2 550 803B 1122.4 35.6 70 2413.6 9.6 550 804B 1142.4 36.4 70 2508.0 10.0 550

1001B 1273.2 35.6 80 2756.8 11.2 550 1002B 1436.0 35.6 90 2950.4 12.0 550 1003B 1590.4 35.6 100 3068.8 12.4 550 1201B 1786.4 33.2 120 3168.8 14.0 500 1202B 1845.2 34.4 120 3460.5 14.0 550 1203B 2113.3 33.7 140 3601.6 14.6 550

Minimum MaximumModel No. MBH ∆T GPM MBH ∆T GPM

Minimum MaximumModel No. MBH ∆T GPM MBH ∆T GPM

Minimum MaximumModel No. MBH ∆T GPM MBH GPM

† 100° F. Entering air temperature; 140° F. Entering fl uid temperature; 40% Ethylene Glycol Performance ranges are given to suggest approximate capacity of units. Contact factory for computer-rated units before fi nal selection.

Please Specify: Capacity or leaving fl uid temperature Fluid type & concentration Entering fl uid temperature Flow rate in GPM Entering air temperature

Table 1: Range of Performance † - 1140 RPM—6-Pole Fans Single Fan-Width Units

Single Fan-Width Units Double Fan-Width Units

Minimum MaximumModel No. MBH ∆T GPM MBH GPM

Minimum MaximumModel No. MBH ∆T GPM MBH ∆T GPM

Minimum MaximumModel No. MBH ∆T GPM MBH ∆T GPM

101A 22.6 5.0 10 25.1 2.8 20 102A 34.4 7.6 10 38.3 4.2 20 103A 50.0 11.1 10 61.5 4.5 30 104A 64.2 14.3 10 79.4 3.5 50 201A 82.8 18.4 10 125.2 4.0 70 202A 104.8 23.2 10 158.8 3.5 100 203A 138.3 15.4 20 174.6 2.8 140 204A 164.8 18.3 20 233.5 5.2 100 205A 177.2 19.7 20 260.2 5.8 100 206A 205.7 22.9 20 310.6 4.3 160 207A 219.3 24.4 20 340.0 4.7 160

208A 243.6 27.1 20 426.2 5.9 160 209A 308.3 22.9 30 456.6 6.3 160 210A 325.3 24.1 30 487.1 4.9 220 211A 366.4 27.2 30 556.1 4.4 280 301A 393.3 29.2 30 690.0 5.9 260 302A 471.7 26.3 40 731.4 4.8 340 303A 497.4 27.7 40 796.9 4.4 400 401A 520.8 29.0 40 882.8 8.9 220 402A 551.7 30.8 40 950.1 7.0 300 403A 576.4 32.1 40 1047.1 6.1 380 404A 593.0 33.1 40 1093.0 6.4 380 501A 607.9 33.9 40 1159.1 9.2 280 502A 629.4 35.1 40 1287.4 7.9 360 503A 760.5 33.9 50 1345.3 8.3 360 601A 838.1 31.1 60 1351.9 11.6 260 602A 965.6 30.8 70 1504.1 10.4 320 603A 1094.7 27.1 90 1573.8 10.9 320

401B 449.4 33.4 30 886.2 8.9 220 402B 553.7 30.9 40 952.1 7.0 300 403B 592.3 33.0 40 1065.9 4.3 550 404B 609.4 34.0 40 1111.0 4.5 550

601B 697.3 31.1 50 1374.1 9.1 500 602B 744.3 33.2 50 1435.0 5.8 550 603B 877.4 32.6 60 1561.2 6.9 450

801B 955.4 30.4 70 1771.5 8.7 450 802B 1010.7 32.2 70 1881.6 7.6 550 803B 1075.7 34.3 70 2028.9 8.2 550 804B 1102.4 35.1 70 2120.7 8.6 550

1001B 1215.9 33.9 80 2312.7 9.3 550 1002B 1374.0 34.1 90 2494.9 10.1 550 1003B 1520.9 33.9 100 2610.0 10.5 550

1201B 1676.2 31.1 120 2686.1 11.9 500 1202B 1750.8 32.5 120 2943.9 11.9 450 1203B 1996.1 31.8 140 3081.7 12.5 450

FSL

FSL FDL

† 100° F. Entering air temperature; 140° F. Entering fl uid temperature; 40% Ethylene Glycol Performance ranges are given to suggest approximate capacity of units. Contact factory for computer-rated units before fi nal selection.

Please Specify: Capacity or leaving fl uid temperature Fluid type & concentration Entering fl uid temperature Flow rate in GPM Entering air temperature

Table 1: Range of Performance † - 825 RPM—8-Pole Fans Single Fan-Width Units

Single Fan-Width Units Double Fan-Width Units

Table 2: Fan and Motor Data

Total CFM Sound Levels* Unit Size Qty Dia

(In) 1140

RPM

RPM

RPM

RPM

Nom. HP MCA— 1140 RPM Models ∆ MCA— 825 RPM Models ∆

RPM

RPM

208-230 3ø

3ø 3ø 3ø 3ø 3ø

575 208-230 460 575

SINGLE FAN-WIDTH MODELS

101A 101A 1 18 3000 2540 — — 102A 102A 1 18 2650 2040 — — 103A 103A 1 22 4250 2850 — — 104A 104A 1 22 3850 5740 — —

201A 201A 2 8550 5700 — — 202A 202A 2 22 7700 5480 — — 203A 203A 2 7000 5110 — —

204A 204A 2 15400 11600 — — 205A 205A 2 15250 11400 206A 206A 2 15000 11500 — — 207A 207A 2

14850 11300 — —

208A 208A 2 21500 16000 66.0 61.0 209A 209A 2 21000 15700 66.0 61.0 210A 210A 2 20500 15300 66.0 61.0 211A 211A 2 20000 14900 66.0 61.0

301A 301A 3 32000 23900 67.0 62.5 302A 302A 3 31500 23500 67.0 62.5 303A 303A 3 31000 23100 67.0 62.5

401A 401A 4 42000 31300 68.0 63.0 402A 402A 4 41000 30600 68.0 63.0 403A 403A 4 40500 30200 68.0 63.0 404A 404A 4 40000 29700 68.0 63.0

501A 501A 5 51250 38200 68.5 63.5 502A 502A 5 50625 37800 68.5 63.5 503A 503A 5 50000 37300 68.5 63.5

601A 601A 6 61500 45900 69.0 64.0 602A 602A 6 61750 45300 69.0 64.0 603A 603A 6

60000 44800 69.0 64.0

1/2 1/4 Minimum Circuit Ampacity: 15.0 a.

All Listed Voltages — 1ø and 3ø

1 1

15.0 15.0

15.0 15.0

15.0 15.0

15.0 15.0

15.0 15.0

15.0 15.0 15.0 15.0 15.0 —

15.0 15.0 15.0 15.0 15.0 —

21.1 15.0 15.0 17.2 15.0 —

21.1 15.0 15.0 17.2 15.0 —

21.1 15.0 15.0 17.2 15.0 —

27.6 15.0 15.0 22.5 15.0 — 1 1/2 1 27.6 15.0 15.0 22.5 15.0 —

27.6 15.0 15.0 22.5 15.0 —

27.6 15.0 15.0 22.5 15.0 —

34.1 17.3 15.0 27.8 15.0 —

34.1 17.3 15.0 27.8 15.0 —

34.1 17.3 15.0 27.8 15.0 —

40.6 20.6 15.0 33.1 16.6 —

40.6 20.6 15.0 33.1 16.6 —

40.6 20.6 15.0 33.1 16.6 —

401B 401B 4 42000 31300 68.0 63.0 402B 402B 4 41000 30600 68.0 63.0 403B 403B 4 40500 30200 68.0 63.0 404B 404B 4 40000 29800 68.0 63.0 601B 601B 6 64000 47700 69.0 64.0 602B 602B 6 63000 47000 69.0 64.0 603B 603B 6 62000 46200 69.0 64.0

801B 801B 8 84000 62600 70.0 64.5 802B 802B 8 30 82000 61100 70.0 64.5 803B 803B 8 81000 60400 70.0 64.5 804B 804B 8 80000 59700 70.0 64.5

1001B 1001B 10 102500 76400 71.0 66.0 1002B 1002B 10 101250 75600 71.0 66.0 1003B 1003B 10 100000 74600 71.0 66.0

1201B 1201B 12 123000 91800 71.5 67.0 1202B 1202B 12 121500 90600 71.5 67.0 1203B 1203B 12 120000 89600 71.5 67.0

27.6 15.0 15.0 22.5 15.0 —

27.6 15.0 15.0 22.5 15.0 —

27.6 15.0 15.0 22.5 15.0 —

27.6 15.0 15.0 22.5 15.0 —

40.6 20.6 15.0 33.1 16.6 —

40.6 20.6 15.0 33.1 16.6 —

40.6 20.6 15.0 33.1 16.6 —

53.6 27.2 19.8 43.7 21.9 — 1 1/2 1 53.6 27.2 19.8 43.7 21.9 —

53.6 27.2 19.8 43.7 21.9 —

53.6 27.2 19.8 43.7 21.9 —

66.6 33.8 24.6 54.3 27.2 —

66.6 33.8 24.6 54.3 27.2 —

66.6 33.8 24.6 54.3 27.2 —

79.6 40.4 29.4 64.9 32.5 —

79.6 40.4 29.4 64.9 32.5 —

79.6 40.4 29.4 64.9 32.5 —

DOUBLE FAN-WIDTH MODELS

FSS FSL

Fan Data Motor Data †

* Sound pressure ratings in dBA 30 feet from unit † Refer to Page 10 for individual fan motor amp ratings.

Minimum Circuit Ampacity

Wiring Options

Standard units are furnished with the motor leads terminated in a single weatherproof enclosure located opposite the header end of the unit. A terminal block is provided on six-fan units and larger.

When the fan cycling control option is ordered, the units are furnished with contactors, power circuit terminal block (except on single fan units), fan cycling controls, a control terminal block and motor fusing, if specifi ed. These components are installed in a weatherproof enclosure, factory mounted and completely wired.

See Figures 3, 4 and 5 for wiring details.

Single Phase Units

Control Circuit

*Refer to Page 11 for Model Number vs. Fan Confi guration

Legend

FB1 - FB3

FC2 - FC3

M1 - M3

MTR1 - MTR3

TB1

PB1

Notes

1. Motor 1 is always located at the header end of the unit.

2. PB1 is not furnished on single fan units.

3. Field control wiring connections are made to terminal block TB1.

4. Contactor holding coils can be furnished in most voltages, including 24, 115, 208-230 or 460 volts.

5. Fan cycling controls FC2 and FC3 can be furnished either as ambient temperature controls or pressure controls.

Fan Cycling—Multi-Fan Units

The Fan Cycling Control system allows fans to be cycled off or on in sequence.

The cycling of fl uid cooler fan(s) provides an automatic means of controlling leaving fl uid temperature at low ambient air temperatures. It also results in substantial fan motor power savings in lower ambients. Ambient temperature or optional fl uid temperature sensing thermostats are used.

Fans are cycled individually on Model FS (single fan-width units); or in pairs on Model FD (double fan-width units). The fan, or fans, nearest the header end of the unit run continuously.

The fan cycling control package consists of a weatherproof enclosure, fan contactors and ambient thermostat(s). The enclosure is factory mounted and completely factory wired. Power must be supplied from a fused disconnect switch to the power circuit terminal block; control circuit power must be supplied to the control terminal block.

Fan Cycling Arrangement

Bypass Fluid Temperature Control

A factory mounted three-way mixing valve with aquastat is available to control leaving fl uid temperature.

Fan Speed Control Options

Available only with Fan Cycling Control Option on Multi-Fan Units.

Designed to enhance the performance of the Fan Cycling Control Option by reducing the RPM and air volume of the lead (header end) fanmotor(s) after all other (lag) fans have cycled off. The lead fan(s) must run continuously, even in the lowest ambient temperature. By reducing their CFM, desired liquid temperature can be maintained at lower ambients.

Temperature Controlled Fan Speed

Includes Hoffman Speed Controller and single phase fan motor. Double fan-width units require one controller for the two lead fan motors. All components are factory mounted. Controller sensing element ismounted on the return header. Controller decreases fan motor RPM as liquid temperature decreases.

....................................................... Fuse Blocks ........................................ Fan Cycling Controls

........................................ Fan Motor Contactors ................................................ Fan Motors

............................................... Control Terminal Block

................................................. Power Terminal Block

Figure 3:

Fan

1x2 1x3 1x4 1x5 1x6

Fan

2x2 2x3 2x4 2x5 2x6

Fans Cycled Per Control

1 pair 1 pair, 1 pair

1 pair, 1 pair, 1 pair, 2 pairs, 1 pair, 1 pair, 2 pairs, 2 pairs, 1 pair, Fans Cycled Per Control

1 pair 1 pair, 1 pair

1 pair, 1 pair, 1 pair, 2 pairs, 1 pair, 1 pair, 2 pairs, 2 pairs, 1 pair, Single Fan Width Double Fan Width

TYPICAL WIRING — THREE PHASE UNITS

*Refer to Page 11 for Model Number vs. Fan Confi guration

Legend

FB1 - FB6

FC2 - FC4

M1 - M6

MTR1 - MTR6

TB1

PB1

Notes

1. Motor 1 is always located at the header end of the unit.

2. Field control wiring connections are made to terminal block TB1.

3. Contactor holding coils can be furnished in most voltages, including 24, 115, 208-230 or 460 volts.

4. Fan cycling controls FC2 and FC3 can be furnished either as ambient temperature controls or pressure controls.

............................................................. Fuse Blocks .............................................. Fan Cycling Controls

.............................................. Fan Motor Contactors ....................................................... Fan Motors

..................................................... Control Terminal Block

....................................................... Power Terminal Block

Figure 4: Single Fan-Width Units Figure 5: Double Fan-Width Units

Power Wiring Power Wiring

Control Wiring Control Wiring

STANDARD FEATURES

• Direct Drive Fans

• 1140 RPM—Model FSS/FDS

• 825 RPM—Model FSL/FDL

• Horizontal Air Discharge available

• Single and Double Fan-Width models

• 45 Model Sizes

• Shipped in operating position (Vertical Discharge)

• Hoisting Eyes for easy rigging Galvanized Steel

• Casing and Frame

TYPICAL FAN CYCLING CONTROL PANEL

• Standard Location — Header End. (Side or Opposite-to-Header-End Mount available)

Weather-Tight Enºclosure

• Options: Temperature Controls

- Variable Speed Control (Lead Fans) Custom

- Wiring and Logic Motor Fusing or Circuit

- Breakers Motor Contactors Control

Individual Fan Contactor and Circuit Breaker option shown

TRANSFORMERS

A. Hoisting Eye B. Return Bend Cover (UL required) C. Hinged Control Panel Cover D. 10 Ga. Legs and Cross-supports

‘FLIP-TOP’ VENTURI PANELS

• Makes coil cleaning quick and thorough

• Dirt can be fl ushed back through the coil to avoid coil plugging.

• Permits Easy Fan and Motor Service

Small Frame Models

DUAL FAN UNITS

• 8 thru 12 Tons — Standard Fan-Speed Models

• 6 thru 9 Tons — Low Fan-Speed Models

SINGLE FAN UNITS

• 1 thru 5 Tons — Standard Fan-Speed Models

• 6 thru 9 Tons — Low Fan-Speed Models

A. Universal Mounting Legs, Horizontal or Vertical Heavy Gauge, Galvanized Steel Casing & Legs

B. Header Guard (UL Required)

Dimensional & Physical Data

FSS/FSL 101A & 102A FSS/FSL 103A thru 203A

One-Fan Units

Two-Fan Units

OPPOSITE END CONNECTIONS

One-Fan Units Add 4 inches to overall length Two-Fan Units Add 6 Inches to overall length

Fluid DataModel Size Volume

Gal.

Weight Lbs.

Volume Gal.

Weight Lbs.

Unit Weight Dry

Fluid DataModel Size

Unit Weight Dry

101A .44 3.7 109 102A .89 7.4 121

103A 1.26 10.5 144

104A 1.90 15.8 160

201A 2.44 20.3 234 202A 3.66 30.5 259

203A 4.88 40.6 283

204A 4.89 40.7 410 205A 4.89 40.7 418

206A 7.33 61.0 436

207A 7.33 61.0 455

208A 7.33 61.0 495 209A 7.33 61.0 520

210A 9.77 81.4 550 211A 12.21 101.7 600

301A 10.85 90.4 800 302A 14.47 120.6 900 303A 18.09 150.7 1000

401A 14.38 119.8 1050 402A 19.17 159.7 1100 403A 23.97 199.7 1150

404A 23.97 199.7 1200

501A 23.88 198.9 1370 502A 29.85 248.6 1430

503A 29.85 248.6 1490

601A 28.58 238.1 1690 602A 35.72 297.6 1750

603A 35.72 297.6 1830

401B 14.66 122.1 1080 402B 19.54 162.8 1140

403B 24.43 203.5 1190

404B 24.43 203.5 1240

601B 21.71 180.8 1640 602B 28.95 241.1 1840

603B 36.18 301.4 2050

801B 28.76 239.6 2150 802B 38.35 319.4 2250

803B 47.94 399.3 2350

804B 47.94 399.3 2460

1001B 47.75 397.8 2800 1002B 59.69 497.2 2950

1003B 59.69 497.2 3075

1201B 57.16 476.1 3400 1202B 71.44 595.1 3620

1203B 71.44 595.1 3750

208-230/1/60 2.5 a.

1/2 H P 208-230/3/60 2.0 a.

460/3/60 1.0 a.

575/1/60 1.0 a.

208-230/1/60 4.9 a.

1 H P 208-230/3/60 4.0 a.

460/3/60 2.0 a.

575/3/60 1.7 a.

208-230/1/60 N/A

1 1/2 HP 208-230/3/60 6.5 a.

460/3/60 3.3 a.

575/3/60 2.4 a.

208-230/1/60 1.4 a.

1/4 HP

208-230/3/60 1.1 a.

460/3/60 0.6 a.

575 Volt. N/A

208-230/1/60 N/A

1 HP 208-230/3/60 6.6 a.

460/3/60 3.4 a.

575 Volt. N/A

GPM

Range

Inlet & Outlet Qty. Size

10-20 1 1 1/4 20-40 1 1 1/2

40-70 1 2

70-100 1 2 1/2 100-150 1 3 150-200 2 2 1/2

200-300 2 3 300-450 3 3

450-550 4 3

Unit Volume & Weights Fan Motor Amps

Connection Sizes †

Single Fan-Width Units

FSS/FSL

Double Fan-Width Units

FDS/FDL

1140 RPM 825 RPM

† All connections are MPT

Fan Configuration

FSS/FSL

Single Fan-Width

Unit Size

Fan Config

Unit Size

Fan Config

301A 302A 303A

1 x3 101A 102A 103A 104A

1 x1

201A 202A 203A

401A 402A 403A 404A

1 x4

501A 502A 503A

1 x5 204A 205A 206A 207A 601A

602A 603A

1 x6208A 209A 210A 211A

1 x 2

FDS/FDL

Double Fan-Width

Unit Size

Fan Config

401B 402B 403B 404B

2x2

601B 602B 603B

2x3

801B 802B 803B 804B

2x4

1002B 1001B

1003B 2x5

1202B 1201B

1203B 2x6

NOTES

Mounting legs are retracted for shipping purposes and must be lowered into position for unit installation.

Control panel can be mounted at opposite end if required.

Units are available for horizontal air discharge—contact factory for details.

END VIEW: Double Fan-Width Models

END VIEW: Single Fan-Width Models

201 Thomas French Drive, Scottsboro, AL 35769 PHONE (256) 259-7400 FAX (256) 259-7478 witt.htpgusa.com

Fluid Cooler Standard Specifications General

Units shall be furnished as per the following specifi cations - Witt Model FS and FD air-cooled fl uid coolers, arranged for vertical airfl ow (horizontal optional). All units to be UL & CUL and MEA-Listed.

Unit Cabinets

Cabinets shall be constructed of heavy-gauge, corrosion resistant galvanized steel for maximum casing rigidity. (Optional heavy-gauge embossed aluminum shall be offered for extra corrosion resistance.)

All multiple fan units shall be divided by full width baffl es to separate individual fan sections, prevent air bypass and provide additional casing reinforcement.

All end panels, center supports and partitions shall have collared tube holes for increased tube life.

Unit sizes FSS-204A and larger shall be provided with lifting eyes for rigging.

Unit sizes FSS-101A through FSS-203A shall have 12 gauge galvanized steel mounting legs and rails. Legs shall be shipped with the unit for fi eld assembly. Headers are arranged for either horizontal or vertical airfl ow.

Unit sizes FSS-204A and larger shall have 10 gauge galvanized steel legs.

Unit sizes FSS-204A and larger can be arranged for vertical or horizontal airfl ow.

Airfl ow must be specifi ed for the header to have the correct connection location.

Fluid Coil

Coils shall be constructed of 1/2 inch O.D.

seamless copper tubing on a staggered pattern. Tubes shall be mechanically expanded into continuous full-collared plate-type aluminum (or optional copper) fi ns for permanent metal-to-metal contact. Headers shall be supplied with vents and drains. All coils shall be factory pressure and leak tested at 400 PSI.

Fans

All fans shall be aluminum propeller blade type with painted steel hubs. Fans shall be dynamically balanced and factory tested before shipping to ensure quiet operation.

Fans shall have dual square head set screws spaced 90 degrees apart which seat onto one fl at and one keyway on the motor shafts. Fan diameters shall not exceed 30 inches.

Fan Guards

Fan guards shall be heavy-gauge, close-meshed steel wire with vinyl coating for maximum rigidity, long life and attractive appearance.

Fan Motors

Fan motors shall be heavy duty PSC or three phase open drip-proof type with permanently lubricated ball bearings and built-in overload protection.

All motors shall be factory wired with leads terminating in a weather-tight enclosure located opposite the header end of the unit.

Leads on units having fi ve or more fans shall terminate at a power block.