FE2 Explosion-Proof Electric Air Heaters

FE2 Explosion-Proof Electric Air Heaters

FE2 heaters are CE Marked & ATEX Approved to Directive 94/9/EC for
use in hazardous locations. They are designed for dry indoor industrial
applications such as oil refineries, petrochemical plants, pulp and paper
mills, hazardous waste storage facilities, wastewater treatment plants,
etc., where specific explosive gases or dusts maybe present. IP55 rated
units available.

All FE2 heaters utilize the VacuCore® liquid-to-air heat exchanger. The
induced vacuum within the sealed core provides greater efficiency, even
distribution of heat across the face of the exchanger, and a faster warmup. When necessary, the entire core can be safely and
easily replaced with a new exchanger or core.
The heater core assembly is contained in a sturdy, epoxy-coated,
12-gauge steel cabinet which also carries the motor and fan assembly.
Adjustable louvres allow directional control of the airflow. A narrow gap,
two-piece fan guard is provided to shield all moving parts. All fasteners
are zinc plated for corrosion protection.
All aspects and details of the FE2 are subjected to exhaustive
technical analysis and testing during design and development, and
are manufactured under a registered quality assurance program. As a
result, they have consistently proven their safety and reliability.

Table 9 – Performance Data for 50 Hertz FE2
DEMKO 10 ATEX 0910365X II 2 G, Ex d IIB T3 Gb 1 Ex d IIB T3 Gb X
Volts Model Nominal Wattage BTU/hr Phase
Total Current Air Temperature Rise
kW A °C °F
220
FE2-220150-025 2.5 8,550
1
11.4 10.6 19.2
FE2-220150-042 4.2 14,350 19.1 17.9 32.2
FE2-220150-063 6.3 21,500 28.6 15.8 28.4
FE2-220150-084 8.4 28,700 38.2 21 37.8
FE2-220150-126 12.6 43,050 57.3 15.3 27.6
230
FE2-230150-028 2.8 9,550 12 12 21.6
FE2-230150-046 4.6 15,700 20 19.8 35.6
FE2-230150-069 6.9 23,550 29.9 17.4 31.4
FE2-230150-092 9.2 31,400 39.9 23.2 41.8
FE2-230150-138 13.8 47,150 59.9 17 30.5
240
FE2-240150-030 3 10,250 12.4 12.8 23.1
FE2-240150-050 5 17,100 20.8 21.4 38.5
FE2-240150-075 7.5 25,600 31.2 18.8 33.9
FE2-240150-100 10 34,150 41.7 25.1 45.2
FE2-240150-150 15 51,250 62.5 18.3 32.9
380
FE2-380350-025 2.5 8,550
3
3.8 11.2 20.1
FE2-380350-042 4.2 14,350 6.4 18.7 33.7
FE2-380350-063 6.3 21,500 9.6 16.5 29.7
FE2-380350-084 8.4 28,700 12.8 22 39.7
FE2-380350-125 12.5 42,700 19 15.9 28.7
FE2-380350-167 16.7 57,050 25.4 21.3 38.3
FE2-380350-209 20.9 71,400 31.8 12.9 23.3
400
FE2-400350-028 2.8 9,550 4.1 12.3 22.1
FE2-400350-046 4.6 15,700 6.6 20.2 36.3
FE2-400350-069 6.9 23,550 10 17.8 32.1
FE2-400350-093 9.3 31,750 13.4 24 43.2
FE2-400350-139 13.9 47,450 20.1 17.4 31.4
FE2-400350-185 18.5 63,200 26.7 23.2 41.8
FE2-400350-231 23.1 78,900 33.3 14.1 25.4
415
FE2-415350-037 3.7 12,650 5.1 16.2 29.1
FE2-415350-075 7.5 25,600 10.4 19.2 34.6
FE2-415350-149 14.9 50,900 20.7 18.6 33.4
FE2-415350-187* 18.7 63,850 26 23.3 41.9
FE2-415350-224 22.4 76,500 31.2 13.6 24.4
FE2-415350-262* 26.2 89,500 36.5 15.9 28.6
440
FE2-440350-042 4.2 14,350 5.5 19.3 34.8
FE2-440350-084 8.4 28,700 11 21.8 39.2
FE2-440350-168 16.8 57,400 22 21 37.9
FE2-440350-210 21 71,700 27.6 12.7 22.9
FE2-440350-252* 25.2 86,050 33.1 15.2 27.4
FE2-440350-294* 29.4 100,400 38.6 17.8 32
NNote
*Available on “B” models only.
1. Minimum conductor size for 30°C (86°F) ambient. Derate conductor for ambient
temperature. Use minimum 90°C (194°F) insulation.
2. Heater is functioning normally if at rated voltage the amp draw is within 10% of the
value in this table.
3. Operation at lower voltage will result in reduced heat output and amp draw.
4. Add ”T” to model number when adding a built-in thermostat.
5. Add “D” to model number for units with disconnect switch option.
6. Add ”A” to model number for units with stainless-steel cabinet.
7. Add “C” to model number for Heresite® coated panels and core.
8. Add ”U” to model number for units with a continuous fan.
9. Add “B” for minimum ambient temperature of -50˚C. Contact factory for available models.
10. Add “M25″ for M25 adapter field entry.

Table 10 – Performance Data for 60 Hertz FE2
DEMKO 10 ATEX 0910365X II 2 G, Ex d IIB T3 Gb 1 Ex d IIB T3 Gb X
Volts Model
Nominal
Wattage BTU/hr Phase
Total Current Air Temperature Rise
kW A °C °F
220
FE2-220160-025 2.5 8,550
1
11.4 8.8 15.8
FE2-220160-042 4.2 14,350 19.1 14.8 26.6
FE2-220160-063 6.3 21,500 28.6 13 23.4
FE2-220160-084 8.4 28,700 38.2 17.4 31.3
FE2-220160-126 12.6 43,050 57.3 12.7 22.8
230
FE2-230160-028 2.8 9,550 12 9.8 17.7
FE2-230160-046 4.6 15,700 20 16.2 29.1
FE2-230160-069 6.9 23,550 29.9 14.3 25.7
FE2-230160-092 9.2 31,400 39.9 19 34.2
FE2-230160-138 13.8 47,150 59.9 13.9 24.9
240
FE2-240160-030 3 10,250 12.4 10.5 19
FE2-240160-050 5 17,100 20.8 17.6 31.7
FE2-240160-075 7.5 25,600 31.2 15.5 27.9
FE2-240160-100 10 34,150 41.7 20.7 37.2
FE2-240160-150 15 51,250 62.5 15.1 27.1
440
FE2-440360-042 4.2 14,350
3
5.5 14.8 26.6
FE2-440360-084 8.4 28,700 11 17.4 31.3
FE2-440360-168 16.8 57,400 22 16.9 30.4
FE2-440360-210 21 71,700 27.6 10.2 18.4
FE2-440360-252* 25.2 86,050 33.1 13.4 24.1
FE2-440360-294* 29.4 100,400 38.6 15.6 28.1
480
FE2-480360-030 3 10,250 3.6 10.5 19
FE2-480360-050 5 17,100 6 17.6 31.7
FE2-480360-075 7.5 25,600 9 15.5 27.9
FE2-480360-100 10 34,150 12 20.7 37.2
FE2-480360-150 15 51,250 18 15.1 27.1
FE2-480360-200 20 68,300 24.1 20.1 36.1
FE2-480360-250* 25 85,400 30.1 12.2 22.9
FE2-480360-300* 30 102,450 36.1 14.6 27.5
FE2-480360-350* 35 119,550 42.1 17.1 32
NNote
*Available on “B” models only.
1. Minimum conductor size for 30°C (86°F) ambient. Derate conductor for ambient
temperature. Use minimum 90°C (194°F) insulation.
2. Heater is functioning normally if at rated voltage the amp draw is within 10% of the
value in this table.
3. Operation at lower voltage will result in reduced heat output and amp draw.
4. Add ”T” to model number when adding a built-in thermostat.
5. Add “D” to model number for units with disconnect switch option.
6. Add ”A” to model number for units with stainless-steel cabinet.
7. Add “C” to model number for Heresite® coated panels and core.
8. Add ”U” to model number for units with a continuous fan.
9. Add “B” for minimum ambient temperature of -50˚C. Contact factory for available
models.
10. Add “M25″ for M25 adapter field entry.
Installation Instructions
• The FE2 Series Electric Air Heaters are for dry indoor use only. Do
not immerse in water. Do not store or use in areas exposed to rain
or snow.
• The FE2 heaters are to be used only in atmospheres having an
ignition temperature higher than Temperature Code T3 200°C
(329°F) for Class I & II.
• Altitude restrictions apply – see specifications above.
• Heaters should be connected to a fixed power supply and must be
permanently mounted in a level, upright position during operation.
• Read and be aware of the terms of our Warranty located in the
owner’s manual.
• Refer to the Owner’s Manual.

Table 11 – Specifications for 50 Hertz FE2
Nominal kW
2.5 – 3.0 3.7 – 5.0 6.3 – 7.5 8.4 – 10.0 12.5 – 13.9 14.9 – 20 20.9 – 21 22.4 – 29.4
Altitude
(max.)
ft 12,000 8,000 10,000 7,000 10,000 7,000 10,000 7,000
m 3,658 2,438 3,048 2,134 3,048 2,134 3,048 2,134
Air Flow
(min.)
@ 70°F (CFM) 387 678 1,404 2,905
@ 21°C (m3
/hr) 658 1,152 2,385 4,936
Horizontal Air
Throw
ft 13 25 35 60
m 4.0 7.6 10.7 18.2
Maximum
Mounting Height
(to underside)
ft 7 10 10 20
m 2.1 3.0 3.0 6.1
Motor Speed (min.) RPM 1360
Fan Diameter
in 12 16 20
mm 305 406 508
Net Weight
without
DS5
lbs 174 202 235
kg 79 92 107
with
DS5
lbs 186 214 247
kg 84 97 112
Shipping Weight
without
DS5
lbs 228 252 286
kg 103 114 130
with
DS5
lbs 240 264 298
kg 109 120 135
*Weights are an approximate maximum.
Table 12 – Specifications for 60 Hertz FE2
Nominal kW
2.5 – 3.0 3.7 – 5.0 6.3 – 7.5 8.4 – 10 12.5 – 13.9 14.9 – 20 20.9 – 21 22.4 – 35.0
Altitude
(max.)
ft 12,000 8,000 10,000 7,000 10,000 7,000 10,000 7,000
m 3,658 2,438 3,048 2,134 3,048 2,134 3,048 2,134
Air Flow
(min.)
@ 70°F (CFM) 394 670 1,380 2,838
@ 21°C (m3
/hr) 669 1138 2,345 4,822
Horizontal Air
Throw
ft 15 30 40 70
m 4.6 9.1 12.2 21.3
Maximum Mounting
Height
(to underside)
ft 7 10 10 20
m 2.1 3.0 3.0 6.1
Motor Speed (min.) RPM 1360
Fan Diameter
in 12 16 20
mm 305 406 508
Net Weight
without
DS5
lbs 174 202 235
kg 79 92 107
with
DS5
lbs 186 214 247
kg 84 97 112
Shipping Weight
without
DS5
lbs 228 252 286
kg 103 114 130
with
DS5
lbs 240 264 298
kg 109 120 135

General Specifications
1. Approvals ATEX Approved (Directive 2014/34/EU)
2. Hazardous Location
Classications DEMKO 10 ATEX 0910365X
II 2 G, Ex d IIB T3 Gb
1 Ex d IIB T3 Gb X
3. Enclosures NEMA Type 7 & 9. For dry, indoor use only. Do not immerse in water. Do not store or use in areas
exposed to rain or snow
4. Motor Type Explosion-proof. Thermally protected. Permanently lubricated ball bearings 1425 RPM @ 50 Hz or 1725
RPM @ 60 Hz
5. Fan Aluminum blade. Steel spider and hub with 19 mm (3/4″) bore
6. Fan Guard Split design with close wire spacing. Meets latest EN standards
7. Mounting Holes Four 16 mm (5/8″) diameter holes at top of heater
8. Heating Elements Three long-life, low watt-density, high grade metal-sheathed elements
9. Temperature High-Limit Automatic reset type, snap-action bimetal, open on temperature rise. Rated 100,000 cycles at 10 amps,
handles 0.130 amps
10. Control Circuit 115 V, 0.130 amps, 15 VA. (Grounded)
11. Optional Built-in
Thermostat
Explosion-proof. 2ºC to 28ºC (36ºF to 82ºF)
Explostion-proof XTE 412. 0ºC to 40ºC (43ºF to 104ºF)
12. Control Transformer Multi-tap primary, 115 V secondary, 50 VA
13. Contactor 75 amp. Rated for 1,000,000 mechanical operations. 120 V, 15 VA coil (separately fused – protected)
14. Heat Transfer Fluid Long life formulated Propylene Glycol and water, freeze protected to -45ºC (-49ºF)
15. Cabinet Material 12-gauge (0.075″ / 2 mm) steel. Epoxy coated with five-stage pretreatment, including iron phosphate
16. Core Steel with integral aluminum fins, vacuum charged and hermetically sealed
17. Conduit Material Heavy wall, 0.122″ (3 mm) steel-plated
18. Overpressure Protection Preset 690 kPa (100 psig) seep pressure relief valve, aluminum body, not field serviceable
19. Operational Temperature
Limitations
-20°C to 40°C (-4°F to 104°F) and -50°C to 40°C for “B” units
20. Ingress Protection IP55 on select models
Table 13 – Cabinet Length, Net Weight, and Shipping Weight