nter-lo Now available with optional lectronically ommutated Motors Medium rofile Unit ooler atalog 20.2 September, 2008 S A N T A T N N A L N A T U N D A T N Air Defrost 12,00 to 9,000 BTUH lectric Defrost 10,500 to 52,000 BTUH Hot Gas Defrost 10,500 to 52,000 BTUH Walk n oolers & reezers Medium to Large Applications Visit us on the Web: www.witthtp.com 201 Thomas rench Dr., Scottsboro, AL 3579 Tel: (25) 259-700 ax: (25) 259-77
eatures ALATNS nter-lo unit coolers are ideally suited for a wide range of coolers and freezers. A models are designed for use in coolers above 35., G, and H units are suited for 35 coolers, when mechanical defrosts are required, as well as for freezers with temperatures ranging down to -30. Sizes There are 37 models offered, with capacities from 10,500 BTUH up to 9,000 BTUH @ 10 TD. Air flow ranges from 3,320 M to 9,130 M. HUSNG ach unit is constructed with a rust-free, heavy gauge, textured, aluminum housing which is light weight yet extremely durable. Air and electric defrost models have hinged drain pans to allow for convenient servicing and maintenance (Hot Gas drain pans are not hinged). Slotted hangers are provided on all units for fast installation. L Seamless copper tubes are staggered and mechanically expanded into heavy gauge corrugated aluminum fins to assure maximum heat transfer. Die formed fin collars are provided for accurate fin spacing. Heavy gauge hangers are fastened directly to the tube sheet of the coil to provide high structural strength. GANTS nter-lo unit coolers are designed for most refrigerants including, -22,- 0A, -13a, -502 and -507. lease specify system refrigerant requirements when ordering. A separate compartment is provided for all refrigerant connections which allows ample room for internal mounting of expansion valves. nter-los can also be used with chilled water or glycol solutions, contact factory for selection. ans owerful heavy duty aluminum fans are individually balanced to provide vibration free operation. Wire fan guards Standard heavy gauge wire fan guards are epoxy coated for corrosion resistance. ptional air straighteners are available for increased air throw when required. Motors S-ermanent Split apacitor or -lectronically ommutated, ball bearing type, life lubricated and thermally protected. nter-lo unit coolers use either 1/8 H, 1050 rpm or 1/3 H, 1075 rpm motors. LTAL Available in 115V/1, 208/230/1, 208/230/3, 0/1 or 0/3. nter-los can also be operated on 220/1/50, 220/3/50, 380/1/50 and 380/3/50 power. All components are factory wired to convenient screw type terminal blocks. A large compartment is supplied for all electrical components and is easily accessible by removing the end panel. A DST Available on A series only, for use in coolers at +35 and above. omplete air defrost systems are available from Witt. LT DST These units are available as models. The placement of heaters within the refrigeration coil allows for a more efficient and rapid defrost cycle than other designs. This arrangement enables the energy from the heaters to be conducted from the center of the core out, providing an even defrost pattern. All heaters are factory installed and wired to screw type terminal blocks, allowing for quick field hook up or change over from 1 to 3 phase with the installation of jumper wires. Separate, fixed defrost termination, fan delay and heater saftey controls are factory mounted for optimum performance of each control func tion. Drain pans are heated for fast, reliable drainage. Timer and contactors are available as options. omplete electric defrost systems are available from Witt. ontact the factory for details. HT GAS -VA DST Available on all but the A models. These units include separate fixed defrost termination and fan delay controls which are factory mounted for optimum performance of each control func tion. A hot gas drain pan circuit is provided, thus eliminating the need for electric heat and additional wiring. A heat exchanger/re-evaporator is supplied with every unit. HT GAS VS YL DST Available on all but the TA models. These units include separate fixed defrost termination and fan delay controls which are factory mounted for optimum performance of each control function. A hot gas drain pan circuit is provided, thus eliminating the need for electric heat and additional wiring. A THW Air throw is greatly affected by installation variables. optimum air throw is obtained by high ceiling with no interference from beams, or return air restrictions. Medium profile unit coolers will throw air up to 50 feet under ideal conditions, 0 to 70 feet with air straightners. 2
nter-lo nergy per Motor by hanging to More fficient Unit ooler Motors (based on nergy ost of $0.10 per kwh) Motor H and M Standard S Motor nput ower Watts/Mtr ptional Motor nput ower Watts/Mtr educed ower onsumption Watts/Mtr un Time Hrs/Day Motor nergy kwh/yr Motor nergy $/Yr educed Box Load MBTU/Yr ond. Unit nergy kwh/yr ond. Unit nergy $/Yr Yearly $/Motor 1/8 1075 11 70 71 22 570 57 1,95 37 37 9 1.5 1/3 1075 357 225 132 22 100 10 3,17 95 70 17 0.9 Subtract % from total savings for medium temperature 2 run hours per day. ayback Yrs Nomenclature T 2-150 - D - nter-lo Models A = Air Defrost = lectric Defrost H = Hot Gas e-evap G = Hot Gas ev. ycle Number of fans Motor Type = S = Voltage ode A = 115V B = 208/1/0 = 230/1/0 D = 208-230/1/0 = 208-230/3/0 = 0/1/0 G = 0/3/0 ins per inch BTUH in hundreds 3
MAN DATA L 8 MDL M BTUH NUMB +25 A28-151 3530 15100 A28-210 3320 21000 A38-20 5300 2000 A38-320 750 32000 A28-10 5250 1000 A28-50 5020 5000 A38-50 8250 5000 A38-90 770 9000 L MDL M BTUH NUMB +25 A2-15 380 1500 A2-191 370 19100 A3-20 5510 2000 A3-305 90 30500 A2-370 50 37000 A3-15 820 1500 A3-90 8580 9000 A3-20 7770 2000 L MDL BTUH M NUMB +25 A2-12 3830 1200 A2-19 320 1900 A3-22 5750 2200 A3-287 5200 28700 A2-30 5710 3000 A2-395 530 39500 A3-5 8990 500 A3-585 810 58500 Z MDL AATY BTUH @ 10 TD (0A, 22) M NUMB -30-20 -10 +10 +25 *2-130 3780 1200 13000 1300 1200 15000 *2-150 370 1300 15000 1500 17000 19100 *3-185 5510 1700 18500 19300 21000 2000 *2-270 5720 25700 27000 28100 29200 30500 *2-320 580 30500 32000 33300 3500 37000 *3-385 9130 3700 38500 0100 300 9000 *3-0 9090 3800 000 7900 52000 5800 *3-520 8190 9500 52000 5100 58800 2000 Z MDL AATY BTUH @ 10 TD (0A, 22) M NUMB -30-20 -10 +10 +25 *2-105 390 10000 10500 11100 11700 1200 *2-10 320 1300 1000 100 15900 1900 *3-175 5750 1700 17500 18200 19800 2200 *2-230 5930 21900 23000 2000 2000 28700 *2-325 530 31000 32500 33800 3800 0100 *3-390 8990 37100 39000 000 100 000 *3-510 8150 800 51000 53100 57700 58500 * = lectric defrost H = Hot gas defrost-e evap G = Hot gas defrost-everse cycle or 50HZ applications, multiply BTU/H capacity by.9 correction factor.
nter-lo HYSAL DATA 8 L AN MT DATA TNAL -VA NNTNS (in.) SH MDL DA. HAT XH HAT XH LQUD SUTN H.G. DAN WT NUMB QTY. H M (in) (UNMTD.) (UNMTD.) DS DS DS MT (lbs) A28-151 1 2 1/8 1050 XH150 1/2 7/8 3/ 125 A28-210 1 2 1/8 1050 XH150 1/2 7/8 3/ 15 A38-20 1 3 1/8 1050 XH250 1/2 1 1/8 3/ 295 A38-320 1 3 1/8 1050 XH250 1/2 1 1/8 3/ 330 A28-10 20 2 1/3 1075 XH250 7/8 1 1/8 3/ 370 A28-50 20 2 1/3 1075 XH250 7/8 1 3/8 3/ 390 A38-50 20 3 1/3 1075 XH350 7/8 1 3/8 3/ 30 A38-90 20 3 1/3 1075 XH350 7/8 1 3/8 3/ 50 L A2-15 1 2 1/8 1050 XH150 1/2 7/8 3/ 120 A2-191 1 2 1/8 1050 XH150 1/2 7/8 3/ 10 A3-20 1 3 1/8 1050 XH150 1/2 7/8 3/ 290 A3-305 1 3 1/8 1050 XH250 1/2 1 1/8 3/ 320 A2-370 20 2 1/3 1075 XH250 7/8 1 1/8 3/ 30 A3-15 20 3 1/3 1075 XH250 7/8 1 1/8 3/ 395 A3-90 20 3 1/3 1075 XH250 7/8 1 3/8 3/ 15 A3-20 20 3 1/3 1075 XH350 7/8 1 3/8 3/ 520 L A2-12 1 2 1/8 1050 XH150 1/2 7/8 3/ 115 A2-19 1 2 1/8 1050 XH150 1/2 7/8 3/ 130 A3-22 1 3 1/8 1050 XH150 1/2 7/8 3/ 280 A3-287 1 3 1/8 1050 XH250 1/2 1 1/8 3/ 310 A2-30 20 2 1/3 1075 XH250 7/8 1 1/8 3/ 35 A2-395 20 2 1/3 1075 XH250 7/8 1 1/8 3/ 375 A3-5 20 3 1/3 1075 XH250 7/8 1 3/8 3/ 00 A3-585 20 3 1/3 1075 XH350 7/8 1 3/8 3/ 505 Z *2-130 1 2 1/8 1050 XH150 HA3A 1/2 1 1/8 7/8 3/ 125 *2-150 1 2 1/8 1050 XH150 HA3A 1/2 1 1/8 7/8 3/ 10 *3-185 1 3 1/8 1050 XH150 HA3A 1/2 1 1/8 7/8 3/ 295 *2-270 20 2 1/3 1075 XH250 HAA 1/2 1 3/8 7/8 3/ 320 *2-320 20 2 1/3 1075 XH350 HAA 7/8 1 3/8 7/8 3/ 35 *3-385 20 3 1/3 1075 XH350 HAA 7/8 1 5/8 7/8 3/ 50 *3-0 20 3 1/3 1075 XH500 HA5A 7/8 1 5/8 7/8 3/ 90 *3-520 20 3 1/3 1075 XH500 HA5A 7/8 1 5/8 7/8 3/ 535 Z *2-105 1 2 1/8 1050 XH150 HA3A 1/2 1 1/8 7/8 3/ 120 *2-10 1 2 1/8 1050 XH150 HA3A 1/2 1 1/8 7/8 3/ 135 *3-175 1 3 1/8 1050 XH150 HA3A 1/2 1 1/8 7/8 3/ 285 *2-230 20 2 1/3 1075 XH250 HAA 1/2 1 3/8 7/8 3/ 315 *2-325 20 2 1/3 1075 XH350 HAA 7/8 1 3/8 7/8 3/ 350 *3-390 20 3 1/3 1075 XH350 HAA 7/8 1 5/8 7/8 3/ 35 *3-510 20 3 1/3 1075 XH500 HA5A 7/8 1 5/8 7/8 3/ 530 * = lectric defrost G = Hot Gas Defrost: reverse cycle H = Hot Gas Defrost: re-evap 5
LTAL DATA TTAL MT AMS - 0 HZ Model S - ermenant Split apacitor Motor - lectronically ommutated Motor Number 115 V 208/230V/1 0V/1 Watts 115V 208/230V/1 Watts 8 A28-151.0 1.8 1.0 282 2. 1.2 10 A28-210.0 1.8 1.0 282 2. 1.2 10 A38-20.0 2.7 1.5 23 3. 1.8 210 A38-320.0 2.7 1.5 23 3. 1.8 210 A28-10 1.2. 2. 71.0.2 50 A28-50 1.2. 2. 71.0.2 50 A38-50 21.3 9. 3.9 1071 9.0.3 75 A38-90 21.3 9. 3.9 1071 9.0.3 75 A2-15.0 1.8 1.0 282 2. 1.2 10 A2-191.0 1.8 1.0 282 2. 1.2 10 A3-20.0 2.7 1.5 23 3. 1.8 210 A3-305.0 2.7 1.5 23 3. 1.8 210 A2-370 1.2. 2. 71.0.2 50 A3-15 21.3 9. 3.9 1071 9.0.3 75 A3-90 21.3 9. 3.9 1071 9.0.3 75 A3-20 21.3 9. 3.9 1071 9.0.3 75 A2-12.0 1.8 1.0 282 2. 1.2 10 A2-19.0 1.8 1.0 282 2. 1.2 10 A3-22.0 2.7 1.5 23 3. 1.8 210 A3-287.0 2.7 1.5 23 3. 1.8 210 A2-30 1.2. 2. 71.0.2 50 A2-395 1.2. 2. 71.0.2 50 A3-35 21.3 9. 3.9 1071 9.0.3 75 A3-585 21.3 9. 3.9 1071 9.0.3 75 *2-130.0 1.8 1.0 282 2. 1.2 10 *2-150.0 1.8 1.0 282 2. 1.2 10 *3-185.0 2.7 1.5 23 3. 1.8 210 *2-270 1.2. 2. 71.0.2 50 *2-320 1.2. 2. 71.0.2 50 *3-385 21.3 9. 3.9 1071 9.0.3 75 *3-0 21.3 9. 3.9 1071 9.0.3 75 *3-520 21.3 9. 3.9 1071 9.0.3 75 *2-105.0 1.8 1.0 282 2. 1.2 10 *2-10.0 1.8 1.0 282 2. 1.2 10 *3-175.0 2.7 1.5 23 3. 1.8 210 *2-230 1.2. 2. 71.0.2 50 *2-325 1.2. 2. 71.0.2 50 *3-390 21.3 9. 3.9 1071 9.0.3 75 *3-510 21.3 9. 3.9 1071 9.0.3 75 * A = Air defrost = lectric defrost G = Hot gas defrost:- everse cycle H = Hot gas defrost: e-vap lectric defrost models are not available in 115V. LT HAT DST AMS - 0HZ MDL 208 V 230 V 0 V HAT MDL 208 V 230 V 0 V HAT NUMB 1 H 3 H 1 H 3 H 1 H 3 H WATTS NUMB 1 H 3 H 1 H 3 H 1 H 3 H WATTS 2-130 18.3 10.5 20.3 11.7 10.1 5.9 85 2-105 18.3 10.5 20.3 11.7 10.1 5.9 85 2-150 18.3 10.5 20.3 11.7 10.1 5.9 85 2-10 18.3 10.5 20.3 11.7 10.1 5.9 85 3-185 15.3 17.0 1.7 8.5 77 3-175 15.3 17.0 1.7 8.5 77 2-270 15.3 17.0 1.7 8.5 77 2-230 15.3 17.0 1.7 8.5 77 2-320 15.3 17.0 1.7 8.5 77 2-325 15.3 17.0 1.7 8.5 77 3-385 22.1 2.5 21.2 12.2 977 3-390 22.1 2.5 21.2 12.2 977 3-0 22.1 2.5 21.2 12.2 977 3-510 22.1 2.5 21.2 12.2 977 3-520 22.1 2.5 21.2 12.2 977
nter-lo LT DST KTS MDL NUMB 2-105 2-10 3-175 2-230 2-325 3-390 3-510 1 VAAT 230/1 230/3 0/1 0/3 D-10 D-10 2 VAATS 3 VAATS 230/1 230/3 0/1 0/3 230/1 230/3 0/1 0/3 D-21 D-21 D-2 D-2 D-37 D-37 D-33 D-33 D-3 D-3 D-32 D-32 D-32 D-32 D-32 MDL NUMB 2-130 2-150 3-185 2-270 2-320 3-385 3-0 3-520 1 VAAT 2 VAATS 3 VAATS 230/1 230/3 0/1 0/3 230/1 230/3 0/1 0/3 230/1 230/3 0/1 0/3 D-10 D-10 D-21 D-21 D-2 D-2 D-2 D-37 D-37 D-37 D-33 D-33 D-3 D-3 D-3 D-32 D-32 D-32 D-32 D-32 LT DST KT MNNTS MDL AUXLAY BLKUT NTATS SQUNNG NUMB TM SWTH LAY HAT AN LAY D-10 1 1-30A 1 1 1-30A 1 1 1-30A 1-25A D-13 1 1 1-50A D-1 1 1 1-50A 1-25A D-15 1 1 2-50A D-1 1 1 2-50A 1-25 D-20 1 1-30A 2 D-21 1 1 2-15A 2 1 1 2-15A 1-25A 2 1 1 2-25A 2 D-2 1 1 2-25A 1-25 2 1 1 2-50A 2 D-2 1 1 2-50A 1-25A 2 D-27 1 1 2-75A 2 D-28 1 1 2-75A 1-25A 2 D-30 1 1-30A 3 D-32 1 1 3-10A 1-25A 3 D-33 1 1 3-15A 3 1 1 3-15A 1-25A 3 1 1 3-30A 3 D-3 1 1 3-30A 1-25A 3 D-37 1 1 3-50A 3 D-38 1 1 3-50A 1-25A 3 Timer nitiates the defrost cycle. also acts as an overide protection device for defrost termination. Auxiliary Switch Mounted on the compressor contactor, it prevents the defrost contactor from operating when the compressor is energized. Block-out elay Serves the same function as the auxiliary switch, except used when a defrost contactor is not required(single phase only). an ontactor Used with 0V motors or when 230v motors are wired for three phase operation. Defrost ontactor arries the amperage load for the heater circuit. ontactor selection is based upon the maximum resistive load rating of the contactor. Sequencing elay rovides interconnection of multiple unit coolers an a single compressor system. This allows each unit cooler to individually terminate defrost on temperature. 7
nter-lo DMNSNAL DATA LT AND HT GAS DST A DST MDLS *2-105 *2-10 *3-175 *2-130 *2-150 *3-185 A2-12 A2-19 A3-22 A3-287 A2-15 A2-191 A3-20 A3-305 A28-151 A28-210 A38-20 A38-320 1 1 1 1 55 55 7 7 2 2 3 3 *2-230 *2-270 A2-30 A2-370 A28-10 2 7 3 *2-325 *2-320 A2-395 A28-50 2 7 3 31-1 / 2 31-1 / 2 *3-385 A3-15 2 10 93 31 *3-390 *3-0 A3-55 A3-90 A38-50 2 10 93 31 *3-510 *3-520 A3-585 A3-20 A38-90 2 10 93 31 * = lectric defrost H = Hot gas defrost - e evap G = Hot gas defrost - everse cycle G. DMNSNS W A B /N 122312012 V2 09/08 2000 WTT reserves the right to make design changes and modifications to its products without notice. Visit us on the Web: www.witthtp.com 201 Thomas rench Dr., Scottsboro, AL 3579 Tel: (25) 259-700 ax: (25) 259-77