Chromalox Electric Heater DU RAD 458 604 757 User Manual

Installation, Operation  
4
DU-RAD  
and  
(Supersedes PG423)  
PG423-1  
RENEWAL PARTS IDENTIFICATION  
161-057863-001  
MARCH, 2004  
Type DU-RAD Electric Radiant Heater  
Three Elements  
Dimensions (In.)  
B
Total  
Heated  
67  
C
D
End  
A
Center  
Heated  
Model  
Volts  
kW  
6.04  
6.42  
6.79  
7.17  
7.55  
8.12  
8.59  
9.16  
9.73  
10.30  
10.70  
11.05  
11.43  
6.60  
6.97  
7.44  
7.82  
8.19  
8.57  
8.95  
9.52  
9.99  
10.56  
11.13  
11.70  
12.10  
12.45  
12.83  
7.60  
7.97  
8.44  
8.82  
9.19  
9.57  
9.95  
Overall  
Heated  
Single Element  
DU-RAD-458  
DU-RAD-466  
DU-RAD-474  
DU-RAD-482  
DU-RAD-490  
DU-RAD-4102  
DU-RAD-4112  
DU-RAD-4124  
DU-RAD-4136  
DU-RAD-4148  
DU-RAD-4156  
DU-RAD-4164  
DU-RAD-4172  
DU-RAD-540  
DU-RAD-548  
DU-RAD-558  
DU-RAD-566  
DU-RAD-574  
DU-RAD-582  
DU-RAD-590  
DU-RAD-5102  
DU-RAD-5112  
DU-RAD-5124  
DU-RAD-5136  
DU-RAD-5148  
DU-RAD-5156  
DU-RAD-5164  
DU-RAD-5172  
DU-RAD-640  
DU-RAD-648  
DU-RAD-658  
DU-RAD-666  
DU-RAD-674  
DU-RAD-682  
DU-RAD-690  
DU-RAD-6102  
DU-RAD-6112  
DU-RAD-6124  
DU-RAD-6136  
DU-RAD-6148  
DU-RAD-6156  
DU-RAD-6164  
DU-RAD-6172  
DU-RAD-740  
DU-RAD-748  
DU-RAD-758  
DU-RAD-766  
DU-RAD-774  
DU-RAD-782  
DU-RAD-790  
DU-RAD-7102  
DU-RAD-7112  
DU-RAD-7124  
DU-RAD-7136  
DU-RAD-7148  
DU-RAD-7156  
DU-RAD-7164  
DU-RAD-7172  
757/  
8
233/  
8
195/  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
797/  
84  
881/  
923/  
983/  
1035/  
1091/  
1151/  
1215/  
8
71  
323/  
361/  
409/  
4411/  
5011/  
5513/  
8
195/  
195/  
195/  
195/  
195/  
195/  
195/  
195/  
195/  
195/  
195/  
195/  
263/  
263/  
263/  
263/  
263/  
263/  
263/  
263/  
263/  
263/  
263/  
263/  
263/  
263/  
263/  
3213/  
3213/  
3213/  
3213/  
3213/  
3213/  
3213/  
3213/  
3213/  
3213/  
3213/  
3213/  
3213/  
3213/  
3213/  
751/  
8
2
Specifications – Table A  
16  
16  
16  
16  
791/  
835/  
895/  
947/  
1005/  
1065/  
1123/  
11613/  
12015/  
1251/  
723/  
763/  
817/  
857/  
90  
941/  
983/  
1043/  
1095/  
1151/  
8
16  
16  
16  
16  
16  
16  
16  
Dimensions (In.)  
208, 240,  
275 or 480  
B
Total  
Heated  
C
D
End  
Heated  
A
Center  
Heated  
2
8
62  
68  
Model  
Volts  
kW  
Overall  
2
8
One Double-Hairpin Element Models  
8
4
741/  
8
DU-RAD-040  
DU-RAD-048  
DU-RAD-058  
DU-RAD-066  
DU-RAD-074  
DU-RAD-082  
DU-RAD-090  
DU-RAD-0102  
DU-RAD-0112  
DU-RAD-0124  
DU-RAD-0136  
DU-RAD-0148  
DU-RAD-0156  
DU-RAD-0164  
DU-RAD-0172  
120, 208  
240 or 275  
120, 208  
240, 275  
or 480  
1.60  
1.97  
2.44  
2.82  
3.19  
3.57  
3.95  
4.52  
4.99  
5.56  
6.13  
6.70  
7.10  
7.45  
7.83  
203/  
2325/  
287/  
331/  
371/  
411/  
453/  
517/  
563/  
621/  
689/  
751/  
7813/  
8211/  
87  
8
1815/  
2225/  
2725/  
3125/  
3525/  
397/  
437/  
497/  
547/  
6015/  
6615/  
7215/  
16  
32  
32  
32  
32  
12511/  
16  
16  
16  
783/  
825/  
861/  
191/  
231/  
283/  
323/  
361/  
409/  
4411/  
16  
32  
12913/  
134  
16  
16  
8
8
2
4
208, 240  
or 275  
815/  
8
4
4
4
4
855/  
903/  
943/  
987/  
10215/  
1071/  
1131/  
1183/  
1243/  
1303/  
8
4
4
4
8
8
4
8
8
4
208,  
240,  
275  
or  
16  
8
4
8
8
4
8
8
8
2
4
16  
8
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
4
2
16  
16  
16  
4
16  
208, 240,  
275 or 480  
5011/  
4
2
5513/  
62  
4
16  
16  
77  
81  
8
2
4
8
1211/  
2
68  
4
851/  
16  
480  
1361/  
2
1275/  
13111  
13513  
140  
8
741/  
8
4
1409/  
14411  
16  
/
/
16  
16  
783/  
825/  
861/  
191/  
231/  
283/  
323/  
361/  
409/  
4411/  
5011/  
5513/  
16  
4
Three Hairpin Element Models  
443/  
483/  
537/  
577/  
62  
661/  
703/  
769/  
815/  
871/  
931/  
995/  
DU-RAD-240  
DU-RAD-248  
DU-RAD-258  
DU-RAD-266  
DU-RAD-274  
DU-RAD-282  
DU-RAD-290  
DU-RAD-2102  
DU-RAD-2112  
DU-RAD-2124  
DU-RAD-2136  
DU-RAD-2148  
DU-RAD-2156  
DU-RAD-2164  
DU-RAD-2172  
DU-RAD-340  
DU-RAD-348  
DU-RAD-358  
DU-RAD-366  
DU-RAD-374  
DU-RAD-382  
DU-RAD-390  
DU-RAD-3102  
DU-RAD-3112  
DU-RAD-3124  
DU-RAD-3136  
DU-RAD-3148  
DU-RAD-3156  
DU-RAD-3164  
DU-RAD-3172  
DU-RAD-440  
DU-RAD-448  
3.20  
3.57  
4.04  
4.42  
4.79  
5.17  
5.55  
6.12  
6.59  
7.16  
7.73  
8.30  
8.70  
9.05  
9.43  
3.80  
4.17  
4.64  
5.02  
5.39  
5.77  
6.15  
6.72  
7.19  
7.76  
8.33  
8.90  
9.30  
9.65  
10.03  
5.20  
5.57  
4
357/  
8
191/  
231/  
283/  
323/  
361/  
409/  
4411/  
5011/  
5513/  
4
85/  
85/  
85/  
85/  
85/  
85/  
85/  
85/  
85/  
85/  
85/  
85/  
85/  
85/  
85/  
117/  
117/  
117/  
117/  
117/  
117/  
117/  
117/  
117/  
117/  
117/  
117/  
117/  
117/  
117/  
195/  
195/  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
/
8
16  
16  
4
1487/  
2
4
4
397/  
45  
8
4
120, 208  
240 or 275  
208, 240  
or 275  
933/  
973/  
4
847/  
8
4
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
8
8
4
887/  
8
4
8
49  
8
1027/  
8
94  
98  
8
531/  
8
2
1067/  
111  
8
8
16  
16  
16  
16  
573/  
615/  
675/  
727/  
785/  
845/  
903/  
9413/  
9815/  
1031/  
421/  
461/  
511/  
551/  
593/  
637/  
679/  
739/  
7811/  
847/  
907/  
97  
1013/  
1053/  
1093/  
577/  
617/  
16  
16  
16  
16  
16  
16  
16  
16  
1021/  
8
2
1151/  
16  
16  
16  
16  
1063/  
1105/  
1165/  
1217/  
1275/  
16  
16  
16  
16  
16  
16  
16  
16  
1193/  
1253/  
1305/  
1361/  
1421/  
208, 240,  
275 or 480  
10.52  
10.99  
11.56  
12.13  
12.70  
13.10  
13.45  
13.83  
8.80  
208, 240  
or 275  
2
8
62  
68  
2
8
8
4
741/  
8
2
8
62  
68  
1335/  
8
10311/  
16  
16  
16  
783/  
825/  
861/  
191/  
231/  
283/  
323/  
361/  
409/  
4411/  
16  
2
1485/  
8
1393/  
14313  
14715  
4
741/  
8
10713/  
112  
51  
16  
16  
15211  
15613  
161  
/
/
16  
/
/
16  
783/  
825/  
861/  
191/  
231/  
283/  
323/  
361/  
409/  
4411/  
16  
8
2
16  
16  
16  
8
4
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
1521/  
8
2
55  
8
4
120, 208  
240 or 275  
971/  
1011/  
1061/  
1101/  
1143/  
1187/  
8
4
3815  
3815  
3815  
3815  
3815  
3815  
3815  
3815  
3815  
3815  
3815  
3815  
3815  
3815  
3815  
/
/
/
/
601/  
8
4
8
208, 240  
or 275  
106  
641/  
681/  
725/  
767/  
827/  
879/  
933/  
993/  
1057/  
10915/  
1141/  
1181/  
663/  
703/  
8
4
8
9.17  
9.64  
110  
8
4
1151/  
8
4
8
4
8
2
10.02  
10.39  
10.77  
11.15  
11.72  
12.19  
12.76  
13.33  
13.90  
14.30  
14.65  
15.03  
1191/  
1231/  
1275/  
1317/  
1377/  
1429/  
1483/  
1543/  
1607/  
16415  
1691/  
1731/  
8
4
8
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
4
8
2
/
/
/
/
5011/  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
16  
1229/  
5513/  
62  
208, 240,  
275 or 480  
1289/  
13311  
5011/  
4
8
/
5513/  
62  
/
/
/
/
/
/
/
208, 240  
or 275  
4
8
68  
1397/  
8
8
741/  
8
4
1457/  
152  
8
68  
16  
16  
16  
16  
783/  
825/  
861/  
191/  
231/  
16  
4
8
741/  
8
16  
/
16  
16  
1561/  
16  
783/  
825/  
861/  
16  
4
8
2
1603/  
1643/  
16  
16  
4
8
4
4
8
2
4
8
4
© 2010 Chromalox, Inc.  
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WIRING  
7. CENTER ELEMENT TERMINAL ASSEMBLY  
Assemble center terminal, washers, nut and wire as shown in  
Figure 6. Hold terminal with pliers and tighten the terminal nut  
securely with a wrench.  
ELECTRIC SHOCK HAZARD. Disconnect all power  
before installing or servicing heater. Failure to do  
so could result in personal injury or property dam-  
age. Heater must be installed by a qualified person  
in accordance with the National Electrical Code,  
NFPA 70.  
ELECTRIC SHOCK HAZARD. Any installation involv-  
ing electric heaters must be performed by a quali-  
fied person and must be effectively grounded in  
accordance with the National Electrical Code to  
eliminate shock hazard.  
1. The power supply voltage should be the voltage as specified on the  
heater nameplate located on the heater housing.  
2. Wiring should be run in flexible or rigid metal conduit and must be  
installed in accordance with the requirements of the National  
Electrical Code and such other local requirements as may be  
applicable. Note: High temperatures will oxidize copper. Do not  
use copper wire in connecting this heater. Nickel-plated copper  
wire, insulated in accordance with requirements for temperature  
and voltage is recommended.  
Figure 6 — Center Element Terminal Assembly  
CAUTION: Terminal clip is spot-welded to element terminal pin  
and over-tightening terminal screw may break the weld or shear  
off terminal pin. However, either the screw or nut should be suffi-  
ciently tightened to eliminate arcing.  
8. SERIES CONNECTION of Radiant Heaters of equal volt and  
watt rating is permitted in all line voltages up to 600 volts. In mak-  
ing such series connections it is necessary to observe the “right”  
(series-parallel) connection rather than the “wrong” (parallel-  
series) connection both shown in Figure 7. If heaters are connect-  
ed according to the “wrong” illustration, failure of any heater will  
cause progressive failure of other heaters still operating.  
3. A sufficient length of this wire (not less than 12”) should be used  
to extend from each heater terminal into a connection box location  
where the temperature does not exceed 300˚F.  
4. ELECTRICAL CONNECTIONS —  
A. End Elements  
Electrical connection to the heater end elements is made  
through the 7/8” dia. opening in the end of the terminal cover  
of the element assembly. A 1/2” flexible conduit connector is  
provided with each element assembly for this purpose.  
B. Center Elements  
Wrong  
Right  
Radiant  
Heaters  
Electrical connection to the heater center element is made  
through the 7/8” dia. opening in the 4” octagon conduit box for  
the element assembly. A 1/2” flexible conduit connector is pro-  
vided with each element assembly for this purpose.  
5. ACCESS TO TERMINALS  
L1  
L2  
L1  
L2  
A. End Elements  
Figure 7  
Access to the end element terminals is obtained by removing  
the mounting bolt, nut and spacer (see Figure 9, items 9, 16 and  
18) and sliding the terminal end of the element assembly out of  
the housing.  
9. DELTA CONNECTIONS — When heaters occur in multiples of  
three, they may be connected to, and balanced across, three-phase  
lines. The most commonly used connection is the delta connection  
illustrated in Figure 8.  
B. Center Elements  
Access to the center mounted element terminals is obtained by  
removing the terminal box cover.  
6. END ELEMENT TERMINALASSEMBLY  
Assemble end terminal, screw and wire as shown in Figure 5. Hold  
terminal with pliers and tighten the terminal screw securely with a  
screwdriver.  
Wrong  
Right  
Radiant  
Heaters  
L1  
L2  
L1  
L2  
Figure 8  
Three phase Delta connections to minimize inductive effect in  
conduits are made per this diagram. The rule: run all 3 three-phase  
conductors in the same conduit as far as possible. For single-phase,  
run only two conductors and follow the same rule.  
Figure 5 — End Element Terminal Assembly  
3
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OPERATION  
enclose the heaters in order to increase the ambient. If evaporation  
CAUTION: For your own safety —  
of a liquid is desired as a result of increasing work temperature, it  
is necessary to provide ventilation air in order to carry away the  
evaporated liquid. Under carefully engineered circumstances, a  
maximum work temperature of 600°F may be attained.  
Before energizing this heater:  
1. Be sure all electrical connections are tightly made.  
2. Be sure that all conductors are properly insulated.  
3. Be sure that terminal box cover has been properly replaced, and  
that secondary insulation bushings have not been omitted.  
Low Megohm Condition — The refractory material used in  
electric heaters may absorb moisture during transit, storage or  
when subject to humid environments that will reduce the cold  
insulation resistance (low megohm). Low megohm may result in a  
high leakage current to ground and nuisance trips of ground fault  
protection equipment. Normally, the megohm value increases after  
heat-up. Typical insulation values are 5 megohm or greater on  
complete assemblies or 20 megohm on individual unsealed ele-  
ments. It is recommended that heaters with 1 megohm or less be  
dried out before applying full power. If dried properly, low  
megohm will not effect heater life or efficiency.  
To correct a low megohm condition, remove terminal enclo-  
sure cover, gaskets, and terminal hardware. Bake heaters in an  
oven at 300 to 350˚F for several hours or preferably overnight.  
An alternate procedure is to cycle the heater in 10 to 15  
minute periods at low voltage until megohm values are normal.  
Sheath temperatures should not exceed 350˚F.  
Controlling Radiant Intensity —  
Standard Radiant Heaters are built to operate at 40 watts per  
sq. inch on the element sheath. When it is desired to reduce radi-  
ant intensity, one or more of the following methods may be used.  
1. INPUT CONTROLLERS. These motor-driven cycling devices  
can be used to vary heater output capacity from 4 to 100%. They  
are usually connected in holding coil circuit of magnetic contac-  
tors. See Chromalox Radiant Heater Manual for further informa-  
tion regarding Input Controllers and Contactors.  
2. SOLID STATE THYRISTOR POWER CONTROLLERS.  
For best non-contact control of radiant heat, a Series #6 Chromalox  
Thyristor Power Controller with manual potentiometer setting is  
recommended. Truly proportional output of from 0 – 100% can be  
easily dialed-in to suit the particular product or process require-  
ments. The Series #6 panels are pre-engineered, pre-packaged  
assemblies in an enclosure with circuit disconnect provided and  
ready for installation.  
Note: Low megohm on heating elements with epoxy or her-  
metic seals cannot be serviced in the field. Typical resistance val-  
ues when sealed are 200 megohm or greater. Contact Chromalox  
service center at number listed.  
Maximum Ambient Temperatures —  
Chromalox Radiant Heaters are not recommended for appli-  
cations in ambient temperatures exceeding 450°F. Higher ambient  
temperatures mean shorter heater life.  
Maximum work temperature in a given time depends on sev-  
eral factors: Reflectivity of work, specific heat of work, mass of  
work, kW input and losses from oven, and time of exposure. As  
work temperature increases, the work loses heat by radiation and  
by convection to the surrounding ambient. Although it is a gener-  
al principle of a Radiant Heater application that work temperature  
conventionally exceeds ambient temperature, in cases where  
extremely high work temperatures are desired, it is necessary to  
FIRE OR SHOCK HAZARD. Moisture accumulation  
in the element refractory material, element over-  
temperature or sheath corrosion can cause ground  
fault to the element sheath, generating arcing and  
molten metal. Install Ground Fault Protection to  
prevent property damage.  
MAINTENANCE  
D. Remove secondary insulation bushings 23 .  
E. Unclip element support clips 12 from housing. (See Fig. 10)  
F. Lift out element.  
ELECTRIC SHOCK HAZARD. Disconnect all power  
before installing or servicing heater. Failure to do  
so could result in personal injury or property dam-  
age. Heater must be installed by a qualified person  
in accordance with the National Electrical Code,  
NFPA 70.  
G. Remove element support clips 12 , bushing retaining clip 14  
and insulating bushings 13 from element.  
To Install Element —  
Observe instructions for removing element and proceed in  
reverse order. Be sure to replace secondary insulating bushings.  
To Remove Heating Element —  
1. End Elements  
Care of Reflectors —  
Reflectors should be cleaned periodically. A mild soap and  
water solution or fine cleaning powder is best although more dras-  
tic means may be required if reflectors are badly soiled by chemi-  
cal or other deposits. The reflector is aluminum. DO NOT use  
alkali cleaners since alkalies will dull reflector. Mild non-alkaline  
cleaners, such as used for scouring kitchen sinks, may be used.  
Reflectors are replaceable and may be purchased from Chromalox.  
A. Remove element assembly mounting nut and bolt 18 and 16  
and element support clips (see Figure 9) and slide element  
assembly out of housing.  
B. Disconnect heating element from electrical leads at both ends.  
C. Remove screws from porcelain terminal blocks.  
D. Remove element support clips and secondary insulating bush-  
ings.  
E. Lift out element.  
2. Center Elements  
A. Remove terminal box cover.  
B. Disconnect heating element from electrical leads and remove  
all hardware from terminals.  
C. Remove screws 24 from secondary insulator retaining brack-  
et and remove bracket 22 .  
4
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RENEWAL PARTS IDENTIFICATION  
Terminal Box  
Cover  
Element  
Support  
Clip  
Assembly  
Figure 10 — Center Element  
PARTS COMMON TO ALL DU-RAD HEATERS  
5
6
Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .303-014316-001  
Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .303-014317-001  
Terminal Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .080-016868-001  
Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .027-016372-001  
7
Figure 9 — End Element  
8
9
Spacer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .032-075525-012  
1
10  
/2” Flexible Conduit Connector and Locknut . . . . . . . . . . . . .119-075454-005  
& 200-075482-002  
11 Terminal Screw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .248-046044-002 (4)  
12 Element Support Clip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .059-014304-002  
13 Insulating Bushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .032-013454-001  
14 Bushing Retaining Clip . . . . . . . . . . . . . . . . . . . . . . . . . . . . .059-017175-001  
Note: To order specify quantity, Model Number, Volts, kW.  
15 Mounting Clamp Parts Bag - For mounting heaters with overall length less  
than 741/2”, use Parts Bag 162-013071-001. For heaters with 741/2” or larger  
overall length, use two Parts Bags 168-013071-001.  
PARTS COMMON TO ALL DU-RAD HEATERS  
4
Reflector (center) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .234-114406-001  
20 #10-32 Nut (4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .200-075520-067  
21 Cup Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .328-075560-002  
22 Bushing retaining bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . .027-018140-001  
23 Insulating bushing (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .162-017459-001  
MISCELLANEOUS HARDWARE  
16 #8-32 Nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .200-075520-064  
17 #8-32 x 13/4” Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .248-075512-194  
18 #8-32 x 1” Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .248-075512-185  
19 #8 Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .328-075528-020  
29 Saddle Clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .238-026539-001 (4)  
24 #10-32 x 3/  
8
lg. Screw (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . .248-075414-093  
25 #10 Flat Washer (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .328-075528-036  
5
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WIRING  
Welded Retaining Rings  
Figure 11 — Type UTU Single Hairpin  
Table C –  
Figure 12 — Type UTU Double Hairpin  
Table B –  
Type UTU – Single Hairpin Elements  
Type UTU – Double Hairpin Elements  
1
Basic  
Element  
Model*  
28  
Volts  
kW  
Model  
Volts  
kW  
Model  
3
Aluminum  
Housing  
Model  
kW  
Reflector  
120 or 240  
208 or 275  
120 or 240  
208 or 275  
208 or 275  
240 or 480  
208 or 275  
240 or 480  
208 or 275  
240 or 480  
208 or 275  
240 or 480  
0.8  
0.8  
1.1  
1.1  
1.8  
1.8  
2.5  
2.5  
3.0  
3.0  
3.6  
3.6  
UTU-2  
UTU-2V  
UTU-3  
UTU-3V  
UTU-4V  
UTU-4  
UTU-5V  
UTU-5  
UTU-6V  
UTU-6  
UTU-7V  
UTU-7  
120 or 240  
208 or 275  
120 or 240  
208 or 275  
120, 240 or 480  
208 or 275  
120, 240 or 480  
208 or 275  
120, 240 or 480  
208 or 275  
208 or 275  
240 or 480  
208 or 275  
240 or 480  
208 or 275  
240 or 480  
208 or 275  
240 or 480  
208 or 275  
240 or 480  
208 or 275  
240 or 480  
208 or 275  
240 or 480  
1.6  
1.6  
1.97  
1.97  
2.44  
2.44  
2.82  
2.82  
3.19  
3.19  
3.57  
3.57  
3.95  
3.95  
4.52  
4.52  
4.99  
4.99  
5.56  
5.56  
6.13  
6.13  
6.7  
6.7  
UTU-40  
UTU-40V  
UTU-48  
UTU-48V  
UTU-58  
UTU-58V  
UTU-66  
UTU-66V  
UTU-74  
UTU-74V  
UTU-82V  
UTU-82  
UTU-90V  
UTU-90  
UTU-102V  
UTU-102  
UTU-112V  
UTU-112  
UTU-124V  
UTU-124  
UTU-136V  
UTU-136  
Single Element Models  
DU-RAD-040  
DU-RAD-048  
DU-RAD-058  
DU-RAD-066  
DU-RAD-074  
DU-RAD-082  
DU-RAD-090  
1.60  
1.97  
2.44  
2.82  
3.19  
3.57  
3.95  
UTU-40  
UTU-48  
UTU-58  
UTU-66  
UTU-74  
UTU-82  
UTU-90  
234-013411-067 (2)  
152-114962-001  
152-114962-002  
152-114962-003  
152-114962-004  
152-114962-005  
152-114962-006  
152-114962-007  
152-114962-008  
152-114962-009  
152-114962-010  
152-114962-011  
152-114962-012  
152-114962-013  
152-114962-014  
152-114962-015  
234-013411-068 (2)  
234-013411-069 (2)  
234-013411-070 (2)  
234-013411-071 (2)  
234-013411-072 (2)  
234-013411-073 (2)  
DU-RAD-0102 4.52  
DU-RAD-0112 4.99  
DU-RAD-0124 5.56  
DU-RAD-0136 6.13  
DU-RAD-0148 6.70  
DU-RAD-0156 7.10  
DU-RAD-0164 7.45  
DU-RAD-0172 7.83  
UTU-102  
UTU-112  
UTU-124  
UTU-136  
UTU-148  
UTU-156  
UTU-164  
UTU-172  
234-013411-074 (2)  
234-013411-075 (2)  
234-013411-076 (2)  
234-013411-077 (2)  
234-013411-078 (2)  
234-013411-079 (2)  
234-013411-080 (2)  
234-013411-081 (2)  
*This is basic Model Number. See Table B or Table C for variation in element model number  
depending upon voltage.  
UTU-148V  
UTU-148  
208 or 275  
240 or 480  
7.1  
7.1  
UTU-156V  
UTU-156  
208 or 275  
240 or 480  
7.45  
7.45  
UTU-164V  
UTU-164  
208 or 275  
240 or 480  
7.83  
7.83  
UTU-172V  
UTU-172  
1
2
End  
Only  
1
2
End  
Only  
Center  
Only  
Center  
Only  
28  
28  
Total  
kW  
Element  
Model*  
Element  
Model*  
3
Aluminum  
Housing  
Total  
kW  
Element  
Model*  
Element  
Model*  
3
Aluminum  
Housing  
Model  
Reflector  
Model  
Reflector  
Three Element Models  
Three Element Models  
DU-RAD-240  
DU-RAD-248  
DU-RAD-258  
DU-RAD-266  
DU-RAD-274  
DU-RAD-282  
DU-RAD-290  
3.20  
3.57  
4.04  
4.42  
4.79  
5.17  
5.55  
UTU-40  
UTU-48  
UTU-58  
UTU-66  
UTU-74  
UTU-82  
UTU-90  
UTU-102  
UTU-112  
UTU-124  
UTU-136  
UTU-148  
UTU-156  
UTU-164  
UTU-172  
UTU-2  
UTU-2  
UTU-2  
UTU-2  
UTU-2  
UTU-2  
UTU-2  
UTU-2  
UTU-2  
UTU-2  
UTU-2  
UTU-2  
UTU-2  
UTU-2  
UTU-2  
234-016383-013 (2) 152-017463-001  
234-016383-014 (2) 152-017463-002  
234-016383-016 (2) 152-017463-004  
234-016383-018 (2) 152-017463-006  
234-016383-020 (2) 152-017463-008  
234-016383-022 (2) 152-017463-010  
234-016383-025 (2) 152-017463-013  
234-016383-029 (2) 152-017463-017  
234-016383-032 (2) 152-017463-019  
234-016383-036 (2) 152-017463-023  
234-016383-042 (2) 152-017463-027  
234-016383-047 (2) 152-017463-032  
234-016383-041 (2) 152-017463-035  
234-016383-056 (2) 152-017463-038  
234-016383-061 (2) 152-017463-042  
DU-RAD-340  
DU-RAD-348  
DU-RAD-358  
DU-RAD-366  
DU-RAD-374  
DU-RAD-382  
DU-RAD-390  
3.80  
4.17  
4.64  
5.02  
5.39  
5.77  
6.15  
UTU-40  
UTU-48  
UTU-58  
UTU-66  
UTU-74  
UTU-82  
UTU-90  
UTU-102  
UTU-112  
UTU-124  
UTU-136  
UTU-148  
UTU-156  
UTU-164  
UTU-3  
UTU-3  
UTU-3  
UTU-3  
UTU-3  
UTU-3  
UTU-3  
UTU-3  
UTU-3  
UTU-3  
UTU-3  
UTU-3  
UTU-3  
UTU-3  
UTU-3  
234-016383-015 (2) 152-017463-003  
234-016383-017 (2) 152-017463-005  
234-016383-019 (2) 152-017463-007  
234-016383-021 (2) 152-017463-009  
234-016383-024 (2) 152-017463-012  
234-016383-027 (2) 152-017463-015  
234-016383-030 (2) 152-017463-017  
234-016383-005 (2) 152-017463-020  
234-016383-036 (2) 152-017463-023  
234-016383-042 (2) 152-017463-027  
234-016383-048 (2) 152-017463-032  
234-016383-052 (2) 152-017463-036  
234-016383-058 (2) 152-017463-040  
234-016383-063 (2) 152-017463-044  
234-016383-067 (2) 152-017463-047  
DU-RAD-2102 6.12  
DU-RAD-2112 6.59  
DU-RAD-2124 7.16  
DU-RAD-2136 7.73  
DU-RAD-2148 8.30  
DU-RAD-2156 8.70  
DU-RAD-2164 9.05  
DU-RAD-2172 9.43  
DU-RAD-3102 6.72  
DU-RAD-3112 7.19  
DU-RAD-3124 7.76  
DU-RAD-3136 8.33  
DU-RAD-3148 8.90  
DU-RAD-3156 9.30  
DU-RAD-3164 9.65  
DU-RAD-3172 10.03 UTU-172  
*This is basic Model Number. See Table B or Table C for variation in element catalog number  
depending upon voltage.  
6
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TESTING AND OPERATION  
1
2
End  
Only  
Element  
Model*  
1
2
End  
Only  
Element  
Model*  
Center  
Only  
Element  
Model*  
Center  
Only  
Element  
Model*  
28  
28  
Total  
kW  
3
Aluminum  
Housing  
Total  
kW  
3
Aluminum  
Housing  
Model  
Reflector  
Model  
Reflector  
Three Element Models  
Three Element Models  
DU-RAD-440  
DU-RAD-448  
DU-RAD-458  
DU-RAD-466  
DU-RAD-474  
DU-RAD-482  
DU-RAD-490  
5.20  
5.57  
6.04  
6.42  
6.79  
7.17  
7.55  
UTU-40  
UTU-48  
UTU-58  
UTU-66  
UTU-74  
UTU-82  
UTU-90  
UTU-102  
UTU-112  
UTU-124  
UTU-136  
UTU-4  
UTU-4  
UTU-4  
UTU-4  
UTU-4  
UTU-4  
UTU-4  
UTU-4  
UTU-4  
UTU-4  
UTU-4  
UTU-4  
UTU-4  
UTU-4  
234-016383-023 (2) 152-017463-011  
234-016383-026 (2) 152-017463-014  
234-016383-028 (2) 152-017463-016  
234-016383-031 (2) 152-017463-018  
234-016383-034 (2) 152-017463-021  
234-016383-038 (2) 152-017463-024  
234-016383-040 (2) 152-017463-026  
234-016383-045 (2) 152-017463-030  
234-016383-051 (2) 152-017463-034  
234-016383-057 (2) 152-017463-039  
234-016383-066 (2) 152-017463-046  
234-016383-071 (2) 152-017463-049  
234-016383-075 (2) 152-017463-052  
234-016383-077 (2) 152-017463-054  
DU-RAD-640  
DU-RAD-648  
DU-RAD-658  
DU-RAD-666  
DU-RAD-674  
DU-RAD-682  
DU-RAD-690  
7.60  
7.97  
8.44  
8.82  
9.19  
9.57  
9.95  
UTU-40  
UTU-48  
UTU-58  
UTU-66  
UTU-74  
UTU-82  
UTU-90  
UTU-6  
UTU-6  
UTU-6  
UTU-6  
UTU-6  
UTU-6  
UTU-6  
UTU-6  
UTU-6  
UTU-6  
UTU-6  
UTU-6  
UTU-6  
UTU-6  
234-016383-042 (2) 152-017463-027  
234-016383-044 (2) 152-017463-029  
234-016383-049 (2) 152-017463-033  
234-016383-054 (2) 152-017463-037  
234-016383-060 (2) 152-017463-041  
234-016383-064 (2) 152-017463-072  
234-016383-070 (2) 152-017463-073  
234-016383-074 (2) 152-017463-051  
234-016383-078 (2) 152-017463-055  
234-016383-081 (2) 152-017463-058  
234-016383-085 (2) 152-017463-061  
234-016383-088 (2) 152-017463-063  
234-016383-091 (2) 152-017463-064  
234-016383-093 (2) 152-017463-066  
DU-RAD-4102 8.12  
DU-RAD-4112 8.59  
DU-RAD-4124 9.16  
DU-RAD-4136 9.73  
DU-RAD-6102 10.52 UTU-102  
DU-RAD-6112 10.99 UTU-112  
DU-RAD-6124 11.56 UTU-124  
DU-RAD-6136 12.13 UTU-136  
DU-RAD-6148 12.70 UTU-148  
DU-RAD-6156 13.10 UTU-156  
DU-RAD-6164 13.45 UTU-164  
DU-RAD-6172 13.83 UTU-172  
DU-RAD-740  
DU-RAD-748  
DU-RAD-758  
DU-RAD-766  
DU-RAD-774  
DU-RAD-782  
DU-RAD-790  
DU-RAD-4148 10.30 UTU-148  
DU-RAD-4156 10.70 UTU-156  
DU-RAD-4164 11.05 UTU-164  
DU-RAD-4172 11.43 UTU-172  
DU-RAD-540  
DU-RAD-548  
DU-RAD-558  
DU-RAD-566  
DU-RAD-574  
DU-RAD-582  
DU-RAD-590  
UTU-4  
UTU-5  
234-016383-080 (2) 152-017463-057  
234-016383-033 (2) 152-017463-019  
UTU-6  
UTU-7  
234-016383-095 (2) 152-017463-067  
234-016383-053 (2) 152-017463-036  
6.60  
6.97  
7.44  
7.82  
8.19  
8.57  
8.95  
UTU-40  
UTU-48  
UTU-58  
UTU-66  
UTU-74  
UTU-82  
UTU-90  
UTU-102  
UTU-112  
8.80  
9.17  
9.64  
UTU-40  
UTU-48  
UTU-58  
UTU-5  
UTU-5  
UTU-5  
UTU-5  
UTU-5  
UTU-5  
UTU-5  
UTU-5  
UTU-5  
UTU-5  
UTU-5  
UTU-5  
UTU-5  
UTU-5  
234-016383-035 (2) 152-017463-022  
234-016383-039 (2) 152-017463-025  
234-016383-043 (2) 152-017463-028  
234-016383-046 (2) 152-017463-031  
234-016383-050 (2) 152-017463-033  
234-016383-055 (2) 152-017463-037  
234-016383-062 (2) 152-017463-043  
234-016383-067 (2) 152-017463-047  
234-016383-073 (2) 152-017463-050  
234-016383-078 (2) 152-017463-055  
234-016383-082 (2) 152-017463-058  
234-016383-084 (2) 152-017463-060  
234-016383-087 (2) 152-017463-062  
234-016383-089 (2) 152-017463-063  
UTU-7  
UTU-7  
UTU-7  
UTU-7  
UTU-7  
UTU-7  
UTU-7  
UTU-7  
UTU-7  
UTU-7  
UTU-7  
UTU-7  
UTU-7  
UTU-7  
234-016383-059 (2) 152-017463-040  
234-016383-065 (2) 152-017463-045  
234-016383-069 (2) 152-017463-048  
234-016383-072 (2) 152-017463-071  
234-016383-076 (2) 152-017463-053  
234-016383-079 (2) 152-017463-056  
234-016383-083 (2) 152-017463-059  
234-016383-085 (2) 152-017463-061  
234-016383-089 (2) 152-017463-063  
234-016383-092 (2) 152-017463-065  
234-016383-094 (2) 152-017463-067  
234-016383-096 (2) 152-017463-068  
234-016383-097 (2) 152-017463-069  
234-016383-098 (2) 152-017463-070  
10.02 UTU-66  
10.39 UTU-74  
10.77 UTU-82  
11.15 UTU-90  
DU-RAD-5102 9.52  
DU-RAD-5112 9.99  
DU-RAD-7102 11.72 UTU-102  
DU-RAD-7112 12.19 UTU-112  
DU-RAD-7124 12.76 UTU-124  
DU-RAD-7136 13.33 UTU-136  
DU-RAD-7148 13.90 UTU-148  
DU-RAD-7156 14.30 UTU-156  
DU-RAD-7164 14.65 UTU-164  
DU-RAD-7172 15.03 UTU-172  
DU-RAD-5124 10.56 UTU-124  
DU-RAD-5136 11.13 UTU-136  
DU-RAD-5148 11.70 UTU-148  
DU-RAD-5156 12.10 UTU-156  
DU-RAD-5164 12.45 UTU-164  
DU-RAD-5172 12.83 UTU-172  
*This is basic Model Number. See Table B and C for variation in model number depending upon voltage.  
Note: Part Numbers suffixed by a number in ( ) indicates the number of parts of same part number used or supplied if more than one.  
7
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Limited Warranty:  
Please refer to the Chromalox limited warranty applicable to this product at  
2150 N. RULON WHITE BLVD., OGDEN, UT 84404  
Phone: 1-800-368-2493  
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