Chromalox Electric Heater PF497 1 User Manual

®
Chromalox  
Installation, Operation  
DIVISION  
SALES  
SECTION  
4
DRA  
and  
(
(
S
S
u
u
p
p
e
er  
r
s
s
e
e
d
d
e
e
s
s
P
PF-497)  
G422-1)  
REFERENCE  
PF497-1  
RENEWAL PARTS IDENTIFICATION  
161-304812-001  
DATE  
NOVEMBER, 2002  
Portable Industrial  
Unit Blower Air Heater  
Type DRA  
Specifications Table 1  
Electrical Data (60 Hz)  
Model  
Dimensions (In.)  
Volts  
kW  
Phase  
Amps* 1/3 Ph  
BTU  
Height  
Width  
Depth  
DRA-07-83  
DRA-07-23  
DRA-10-83  
DRA-10-23  
DRA-15-83  
DRA-15-23  
DRA-15-43  
DRA-15-63  
DRA-20-23  
DRA-20-43  
DRA-20-63  
DRA-30-43  
DRA-30-63  
208  
240/208  
208  
240/208  
208  
240/208  
480  
600  
240/208  
480  
600  
480  
600  
7.5  
7.5/5.6  
9.75  
9.75/7.3  
15  
15/11.2  
15  
15  
19.5/15  
20  
20  
30  
30  
1 and 3  
1 and 3  
1 and 3  
1 and 3  
3
36.3/21.0  
31.5/18.3**  
47.1/27.3  
40.8/23.7**  
41.8  
25,590  
25,590  
33,267  
33,267  
51,180  
51,180  
51,180  
51,180  
66,534  
68,240  
68,240  
102,360  
102,360  
34.25  
34.25  
34.25  
34.25  
34.25  
34.25  
34.25  
34.25  
34.25  
34.25  
34.25  
34.25  
34.25  
27.5  
27.5  
27.5  
27.5  
27.5  
27.5  
27.5  
27.5  
27.5  
27.5  
27.5  
27.5  
27.5  
25  
25  
25  
25  
25  
25  
25  
25  
26.5  
26.5  
26.5  
26.5  
26.5  
3
36.3**  
1 and 3  
1 and 3  
3
1 and 3  
1 and 3  
3
31.4/18.2  
25.2/14.6  
47.1**  
42.0/24.4  
33.5/19.4  
36.3  
3
20.1  
* = Includes motor amps  
** = Ratings shown are for 240V, 208V amperage is 86% of 240V value.  
Models shown as 1 and 3 phase are factory wired for 3 phase operation and can be field wired for single phase.  
GENERAL  
such fabrics away from heater. Do not operate  
heater where flammable vapors, gases or liquids  
are present. Heaters in the heat mode should not  
be operated in room temperatures above 80°F. Fan  
motor is not designed to operate in ambients below  
-40°F.  
IMPORTANT:  
SAVE THESE INSTRUCTIONS  
Risk of fire. Do not use as a residential or house-  
hold heater.  
To avoid personal injury read “IMPORTANT  
INSTRUCTIONS” on page 2 before installation or  
operation of heater.  
Hazard of Fire or Discoloration of Temperature  
Sensitive Fabrics. Do not use as a residential or  
household heater. Keep combustible material and  
Keep electrical cords and combustible materials,  
such as drapes and other furnishings, away from  
heater.  
© 2010 Chromalox, Inc.  
 
WIRING  
Chart A Cable and Plug Selection  
Wiring  
Diag. No.  
Wire  
Size  
25’ Cord Set  
Chromalox Catalog No.  
Optional Plugs  
Model  
kW  
7.5  
Volts  
Phase  
Amps  
Locking Type  
Non Lock Type  
DRA-07-83  
DRA-07-83  
DRA-07-23  
DRA-07-23  
DRA-07-23  
DRA-07-23  
DRA-10-83  
DRA-10-83  
DRA-10-23  
DRA-10-23  
DRA-10-23  
DRA-10-23  
DRA-15-83  
DRA-15-23  
DRA-15-23  
DRA-15-43  
DRA-15-43  
DRA-15-93  
DRA-15-93  
DRA-20-23  
DRA-20-23  
DRA-20-43  
DRA-20-43  
DRA-20-93  
DRA-20-93  
DRA-30-43  
DRA-30-93  
208  
208  
208  
208  
240  
240  
208  
208  
208  
208  
240  
240  
208  
208  
240  
480  
480  
600  
600  
208  
240  
480  
480  
600  
600  
480  
600  
1
3
1
3
1
3
1
3
1
3
1
3
3
3
3
1
3
1
3
3
3
1
3
1
3
3
3
1A  
1
1A  
1
1A  
1
36.3  
21.0  
27.1  
15.7  
31.5  
18.2  
47.1  
27.2  
35.4  
20.4  
40.8  
23.6  
41.8  
31.4  
38.3  
31.5  
18.2  
25.2  
14.6  
41.8  
48.3  
41.9  
24.4  
33.5  
19.4  
36.3  
29.1  
8/3  
10/4  
10/3  
12/4  
8/3  
12/4  
6/3  
8/4  
8/3  
10/4  
6/3  
10/4  
6/4  
8/4  
6/4  
8/3  
12/4  
10/3  
14/4  
6/4  
4/4  
6/3  
PLC-2508-3  
PLC-2510-4  
PLC-2510-3  
PLC-2512-4  
PLC-2508-3  
PLC-2512-4  
PLC-2506-3  
PLC-2508-4  
PLC-2508-3  
PLC-2510-4  
PLC-2506-3  
PLC-2510-4  
PLC-2506-4  
PLC-2508-4  
PLC-2506-4  
PLC-2508-3  
PLC-2512-4  
PLC-2510-3  
PLC-2514-4  
PLC-2506-4  
PLC-2504-4  
PLC-2506-3  
PLC-2510-4  
PLC-2508-3  
PLC-2512-4  
PLC-2506-4  
PLC-2508-4  
———  
PGL-15-30  
PGL-15-30  
PGL-15-20  
———  
PGL-15-20  
———  
PGL-15-30  
———  
PGL-15-30  
———  
PGN-6-50  
PGN-15-50  
PGN-6-50  
PGN-15-20  
PGN-6-50  
PGN-15-20  
PGN-6-50  
PGN-15-50  
PGN-6-50  
PGN-15-50  
PGN-6-50  
PGN-15-50  
PGN-15-50  
PGN-15-50  
PGN-15-50  
———  
7.5  
5.6  
5.6  
7.5  
7.5  
9.75  
9.75  
7.3  
7.3  
9.75  
9.75  
15  
11.2  
15  
15  
15  
15  
1A  
1
1A  
1
1A  
1
———  
1
1
1
2A  
2
———  
———  
———  
PGL-3763C  
PGL-16-30  
PGL-3763C  
PGL-17-30  
———  
———  
———  
———  
2A  
2
15  
15  
20  
20  
20  
20  
20  
3
3
4A  
4
4A  
4
PGN-15-50  
PGN-15-50  
———  
———  
———  
———  
PGL-3763C  
PGL-17-30  
PGL-3763C  
PGL-17-30  
PGL-3764C  
PGL-17-30  
10/4  
8/3  
12/4  
6/4  
———  
30  
30  
4
4
———  
———  
8/4  
Power Cord based on 600V Hard Service Cord Rated 90°C  
Plug selection is based on using Chromalox Cable Kits  
Plug Selection  
Fits Cable Dia. Plug Type  
Model  
Description  
Volts  
Amps Configuration  
NEMA #  
ANSI #  
X
G
Y
.385”-.780”  
.385”-.780”  
Locking  
Locking  
PGL-15-20  
3 Pole, 4 Wire  
250  
20  
30  
L15-20  
C73.85  
Z
X
G
G
Y
Y
PGL-15-30  
PGL-16-30  
PGL-17-30  
PGL-3763C  
PGL-3765C  
PGN-6-50  
3 Pole, 4 Wire  
3 Pole, 4 Wire  
3 Pole, 4 Wire  
2 Pole, 4 Wire  
3 Pole, 4 Wire  
2 Pole, 3 Wire  
3 Pole, 4 Wire  
3 Pole, 4 Wire  
250  
480  
600  
600  
600  
250  
250  
250  
L15-30  
L16-30  
L17-30  
C73.86  
C73.88  
C73.89  
Z
X
.595”-1.150”  
.595”-1.150”  
.750”-1.125”  
.750”-1.125”  
.625”-1.187”  
.390”-.775”  
.750”-1.250”  
Locking  
Locking  
30  
30  
50  
50  
50  
20  
50  
Z
X
G
Y
X
Z
Y
Locking  
G
Y
X
Locking  
Z
G
Non Locking  
6-50  
C73.53  
C73.59  
C73.61  
G
G
Z
Non Locking PGN-15-20  
Non Locking PGN-15-50  
15-20  
15-50  
X
W
W
X
Z
The above plugs are designed to be used with specific ranges of cable diameters. If not used with Chromalox Cable Kits, check cable man-  
ufacturers cable diameter to be sure plug fits selected cable.  
3
 
WIRING  
Cord Preparation for Chromalox Portable Heaters  
3. Slide fitting onto cord and tighten knurled nut to secure fitting  
to cord.  
1. Determine the gage and number of conductors from the tabu-  
lation below using amps and phase from the heater nameplate.  
It is not recommended that cord exceed 50 feet in length.  
4. Select plug to match electrical rating of cord.  
5. On opposite end of cord prepare end as directed by instructions  
that are provided with the plug.  
Chromalox Cord Kit*  
Model No.  
Cord Ga/No. Cond. and Type  
6. Attach cord assembly to heater as shown in Fig. 2 below:  
Max. Heater Amps  
1 Phase  
3 Phase  
14/4 SO  
12/4 SO  
Run wire tie through slots in bracket  
and over cord. Pull tab of wire tie to  
provide cord strain relief.  
15  
20  
30  
25  
40  
35  
55  
45  
60  
PLC-2514-4  
PLC-2512-4  
PLC-2510-3  
PLC-2510-4  
PLC-2508-3  
PLC-2508-4  
PLC-2506-3  
PLC-2506-4  
PLC-2504-4  
90° fitting  
10/3 SO  
8/3 SO  
6/3 SO  
10/4 SO  
8/4 SO  
Ground  
wire  
6/4 SO  
4/4 SO  
*Includes 90 degree fitting and 25 foot of cord, reducers and locknut  
2. Strip off outer jacket of cord and insulation from lead wires.  
The tabulation below provides the strip dimensions for the var-  
ious Chromalox portable heaters. See the nameplate on the  
heater for the Model number.  
Power  
wires  
Model No.  
A
B
C
DRA - (all suffixes)  
8”  
1”  
0.5”  
Figure 2  
"A"  
"B" (Insulation strip dimension for ground wire).  
"C" (Insulation strip dimension for power wires).  
OPERATION  
The adjustment knob controls power to the heater and fan when  
turned further in the clockwise direction, with the highest tempera-  
ture setting in the extreme clockwise position.  
The temperature setting in the heater mode is approximately  
40°F in the low setting and 100°F at the highest setting.  
Note: The adjustment knob should be turned to the fan only set-  
ting after use for heating. The fan should be left on for at least 3  
minutes to remove residual heat from the unit and to prevent over-  
heating of the housing.  
THERMOSTAT  
Heaters include a bimetal thermostat for the automatic control  
of the exiting air temperature. The thermostat knob controls the  
heating elements and fan functions. The heater and fan are de-  
energized with the knob in the extreme clockwise position.  
Turning the knob clockwise from the off position to the fan  
position will energize the fan only, for use in summer cooling.  
4
 
WIRING DIAGRAMS  
Diag. 1 FACTORY WIRED 3 PHASE  
Diag. 1a – FIELD CONVERSION TO 1 PHASE  
Cord by others.  
Cord by others.  
Type "SO" or equal  
sized to meet nameplate  
requirements  
Type "SO" or equal  
sized to meet nameplate  
requirements  
6
5
2
6
5
3
2
2
6
6
L3  
L2  
L1  
T3  
T2  
T1  
1
4
Front of  
Heater  
Front of  
Heater  
5
5
1
1
L2  
L1  
T2  
T1  
4
1
3
3
2
4
4
All control wiring  
same as Diag. 1  
Thermostat  
1
3
3
Instructions:  
1. Loosen screws on load side of contactor. Remove all lead wire.  
2. Insert lead wires numbers 1, 3, and 5 into box lug connector "T1". Tighten screws  
on box lug connector.  
3. Insert lead wires numbers 2, 4, and 6 into box lug connector "T2". Tighten screws  
on box lug connector.  
4. Examine wiring to make certain it is per above diagram.  
4
6
Red  
Blk  
Blu  
Motor  
Cutout  
Wht  
Diag. 2 – FACTORY WIRED 3 PHASE  
Diag. 2a – FIELD CONVERSION TO 1 PHASE  
Cord by others.  
Type "SO" or equal  
sized to meet nameplate  
requirements  
Cord by others.  
5
3
1
Type "SO" or equal  
sized to meet nameplate  
requirements  
5
To T2  
4
6
4
To T3  
3
1
Contactor  
3
To T3  
Contactor  
L3  
L2  
L1  
T3  
T2  
T1  
4
2
Front of  
Heater  
5
1
All even numbered wires to T2  
6
3
2
Front of  
Heater  
L2  
L1  
6
4
2
T2  
T1  
To T1  
All odd numbered wires to T1  
1
To T1  
To T2  
2
4
5
1
6
2
All control wiring  
same as Diag. 2  
6
Fan Relay  
3
5
L1  
L2  
A1  
T1  
T2  
A2  
Black  
White  
Motor  
Blk/Red or Grey  
Blk  
Instructions:  
1. Loosen screws on load side of contactor. Remove all lead wire.  
2. Insert lead wires numbers 1, 3, and 5 into box lug connector "T1".  
Tighten screws on box lug connector.  
Thermostat  
3
1
3. Insert lead wires numbers 2, 4, and 6 into box lug connector "T2".  
Tighten screws on box lug connector.  
4. Examine wiring to make certain it is per above diagram.  
Cutout  
6
4
Wht  
XFMR  
Blk  
Diag. 3 – FACTORY WIRED 3 PHASE  
12  
11  
9
Cord by others.  
Type "SO" or equal  
sized to meet nameplate  
requirements  
8
7
To T2  
4
To T3  
3
12  
4
Front of  
Heater  
Contactor  
11  
8
3
2
L3  
L2  
L1  
T3  
T2  
T1  
7
10  
5
5
1
1
9
10  
6
6
2
To T2 To T1  
To T1  
To T3  
Thermostat  
3
1
Red  
Black  
4
6
Motor  
Blue  
Cutout  
White  
Diag. 4 FACTORY WIRED 3 PHASE  
Diag. 4a – FIELD CONVERSION TO 1 PHASE  
Cord by others.  
Type "SO" or equal  
sized to meet nameplate  
requirements  
12  
11  
9
12  
10  
8
Cord by others.  
Type "SO" or equal  
sized to meet nameplate  
requirements  
8
7
6
To T3 To T2  
3
4
4
12  
11  
4
Front of  
Heater  
Contactor  
2
Contactor  
8
3
All even numbered wires to T2  
L3  
L2  
L1  
12  
T3  
T2  
T1  
7
L2  
4
Front of  
Heater  
T2  
L1  
10  
3
8
1
1
5
5
11  
9
T1  
10  
All odd numbered wires to T1  
1
2
2
6
7
6
1
5
9
To T2 To T1  
All control wiring  
same as Diag. 4  
To T3 To T1  
2
10  
6
3
5
Fan Relay  
L1  
L2  
A1  
T1  
T2  
A2  
Black  
White  
Motor  
7
Blk/Red or Grey  
Blk  
9
11  
Instructions:  
Thermostat  
1. Loosen screws on load side of contactor. Remove all lead wire.  
3
1
2. Insert lead wires numbers 1, 3, 5, 7, 9 and 11 into box lug connector "T1".  
Tighten screws on box lug connector.  
3. Insert lead wires numbers 2, 4, 6, 8, 10 and 12 into box lug connector "T2".  
Tighten screws on box lug connector.  
4. Examine wiring to make certain it is per above diagram.  
Cutout  
6
4
Wht  
XFMR  
Blk  
5
 
MAINTENANCE  
Replace or repair damaged cords or plugs immediately. Check  
tightness of all electrical connections prior to energizing Dragon.  
Blow out or vacuum away any dirt or debries that may have accu-  
mulated around the control enclosure fan motor or heating ele-  
ments.  
ELECTRIC SHOCK HAZARD. Disconnect heater  
from power supply before servicing and/or inspect-  
ing the heater; failure to do so may result in elec-  
trical shock.  
RENEWAL PARTS IDENTIFICATION  
Element  
Part No.  
Motor  
Part No.  
Fan  
Part No.  
Contactor  
Part No.  
Control  
Trans/  
Model No.  
Volts  
kW  
Phase  
DRA-07-83  
DRA-07-23  
DRA-10-83  
DRA-10-23  
DRA-15-83  
DRA-15-23  
DRA-15-43  
DRA-15-93  
DRA-20-23  
DRA-20-43  
DRA-20-93  
208  
240  
208  
240  
208  
240  
480  
600  
240  
480  
600  
7.5  
7.5  
9.75  
9.75  
15  
1 and 3  
1 and 3  
1 and 3  
1 and 3  
3
118-304793-001  
118-304793-002  
072-304551-014  
072-304551-014  
072-304551-014  
072-304551-014  
072-304551-014  
072-304551-014  
———  
———  
———  
———  
———  
———  
118-304793-003 193-302120-009  
118-304793-004  
118-304793-007  
15  
3
118-304793-008  
15  
1 and 3  
1 and 3  
3
118-304793-009 193-302120-012  
072-304551-008 315-304252-001  
15  
118-304793-010 193-302120-015 112-045422-007 072-304551-008 315-304252-003  
19.5  
20  
118-304793-004 193-302120-009  
118-304793-005 193-302120-012  
118-304793-006 193-302120-015  
072-304551-014  
———  
1 and 3  
1 and 3  
072-304551-008 315-304252-001  
072-304551-008 315-304252-003  
20  
118-304793-011a  
193-302120-012  
118-304793-013b  
DRA-30-43*  
DRA-30-93*  
480  
600  
30  
30  
3
3
072-304551-008 315-304252-001  
072-304551-008 315-304252-003  
118-304793-012a  
193-302120-015  
118-304793-014b  
30 kW units contain two sets of three elements (six total). The ratings of the three elements on the discharge end have a lower wattage than the elements on the fan end of  
heater. The ends of the elements are color coded, the lower wattage are color coded yellow and the higher wattage are color coded blue.  
a. Lower wattage elements, discharge end, yellow coded  
b. Higher wattage elements, fan end, blue coded  
PARTS COMMON TO ALL UNITS  
Description  
Wheels  
Part No.  
333-557518-004  
134-304780-002  
300-304782-001  
300-048038-003  
Grille  
Thermostat  
Thermal Cut-out  
Fan Relay (not used on  
208 and 240V Models)  
072-123534-057  
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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