®
Chromalox
Installation, Operation
DIVISION
SALES
SECTION
4
DRA
and
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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.
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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
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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
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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
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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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