BerkoMEP RUX Series Explosion-Proof Unit Heater
CAPACITIES
- 2.5–35 kW | 208–600V | 1Ø or 3Ø
- Thermostat Range: 50°–90° F
- Air Volume: 550–3850 CFM
- Air Throw Range: 13–75 feet
- Class 1, Divisions 1 & 2, Groups C & D
- Class Il, Divisions 1 & 2, Groups F & G
- Class 1, Zones 1 & 2, Groups lIB
- Ignition Temperature Code T3C, 320° F
- JOB NAME:
- LOCATION:
- ARCHITECT:
- ENGINEER:
- CONTRACTOR:
- SUBMITTED BY:
- DATE
RUX SERIES – EXPLOSION-PROOF UNIT HEATER
|
TAG/ITEM |
QTY. |
CATALOG NUMBER |
HEATER |
AMPS |
AIR MOVEMENT | ||||
| KW | VOLTS | Ø | CFM | THROW | TEMP. RISE | ||||
|
ACCESSORIES AND CONTROLS |
TAG/ITEM | QTY. | CATALOG NUMBER | DESCRIPTION |
| SUBMITTED BY: | DATE |
| APPROVED BY: | DATE |
ARCHITECT’S AND ENGINEER’S SPECIFICATIONS
Electric explosion proof unit heater(s) shall be supplied by Berko®, a Marley Engineered Products® Brand, Bennettsville, SC, USA, and shall be of the KW rating, voltage and phase specified in the schedule. They shall be fan-forced type, certified to cCSAus, and approved for Class I, Divisions 1 and 2, Group C and D; Class II, Divisions 1 and 2, Groups E, F, and G; Class I, Zones 1 and 2, Group IIB; Temperature Code T3C, 320°F (160°C).
- SAFETY: Unit heaters shall be outfitted with dual overtemperature production—both a manual and automatic reset thermal cutout.
- HEAT EXCHANGER: Efficient liquid-to-air design utilizes all-welded steel headers and finned tube construction with spiral wound aluminum fins. Industrial-grade heating elements are immersed in a nontoxic, inhibited, propylene glycol heat transfer fluid that provides freeze protection down to -49°F (-45°C). The heat exchanger is hydrostatically tested at 350 psig. A pressure relief valve provides excess pressure protection and is set at 70 psig.
- ENCLOSURE: Heat exchanger and components to be enclosed in an industrial-grade, corrosion-resistant cabinet fabricated from polyester powder-coated, 14-gauge steel. Adjustable outlet louvers to have minimum opening safety stops.
- FAN MOTOR ASSEMBLY: Unit heaters consist of an explosion-proof motor (60Hz standard, 50hz optional) fitted with an aluminum fan blade. The motor has double shielded, permanently lubricated ball bearings and automatic reset line breaking thermal overload protection. Motors furnished on standard units operate at line voltage and are prewired to the control enclosure so separate field wiring to the motor is not required. The standard motor is rated for Class I, Groups C and D, Class II, Groups F and G. The minimum operating temperature is -14°F (-25°C) and the minimum storage temperature is -49°F (-45°C). Optional motor ratings available.
- MOUNTING: The heater shall be provided with an accessory mounting kit designed to bear the weight of heater assembly. Options include a ceiling mounting kit, wall mounting kit, or a pole mounting kit.
- OPTIONAL BUILT-IN CONTROLS: Units come standard with a controlling magnetic contactor and 24 Volt control circuit transformer housed in a NEMA 7, 9 cast aluminum enclosure. The following factory installed and prewired control options are available: adjustable built-in thermostat, disconnect switch with external handle, fan-only switch, 120 Volt control circuit for special external thermostat circuit, “warning” pilot light (to indicate abnormal operation), “Heater On” pilot light
- Berko reserves the right to change specifications without prior notice.
RUX SERIES
60 Hz Models & Specifications
| ITEM INFORMATION
CATALOG NO. |
VOLTS |
ELECTRICAL DATA
PHASE TOTAL AMPS* |
KW |
HP |
MOTOR
RPM FAN BLADE DIAMETER |
RISE** |
AIR FLOW
CFM THROW |
FRAME SIZE |
SHIP WT. |
| RUX-233-FA-0036C | 208 | 1 | 17 |
3.0 |
1/4 | 1725 | 12″ | 15°F | 650 | 15″ | 1 | 130 lbs |
| RUX-233-FA-0036J | 240 | 1 | 15 | 1/4 | 1725 | 12″ | 15°F | 650 | 15″ | 1 | 130 lbs | |
| RUX-233-FA-0036D | 208 | 3 | 10 | 1/4 | 1725 | 12″ | 15°F | 650 | 15″ | 1 | 130 lbs | |
| RUX-233-FA-0036K | 240 | 3 | 9 | 1/4 | 1725 | 12″ | 15°F | 650 | 15″ | 1 | 130 lbs | |
| RUX-233-FA-0036U | 480 | 3 | 5 | 1/4 | 1725 | 12″ | 15°F | 650 | 15″ | 1 | 130 lbs | |
| RUX-233-FA-0036Z | 600 | 3 | 4 | 1/4 | 1725 | 12″ | 15°F | 650 | 15″ | 1 | 130 lbs | |
| RUX-233-FA-0056C | 208 | 1 | 26 |
5.0 |
1/4 | 1725 | 12″ | 25°F | 650 | 15″ | 1 | 130 lbs |
| RUX-233-FA-0056J | 240 | 1 | 23 | 1/4 | 1725 | 12″ | 25°F | 650 | 15″ | 1 | 130 lbs | |
| RUX-233-FA-0056D | 208 | 3 | 16 | 1/4 | 1725 | 12″ | 25°F | 650 | 15″ | 1 | 130 lbs | |
| RUX-233-FA-0056K | 240 | 3 | 14 | 1/4 | 1725 | 12″ | 25°F | 650 | 15″ | 1 | 130 lbs | |
| RUX-233-FA-0056U | 480 | 3 | 7 | 1/4 | 1725 | 12″ | 25°F | 650 | 15″ | 1 | 130 lbs | |
| RUX-233-FA-0056Z | 600 | 3 | 6 | 1/4 | 1725 | 12″ | 25°F | 650 | 15″ | 1 | 130 lbs | |
| RUX-233-FA-0086C | 208 | 1 | 38 |
7.5 |
1/4 | 1725 | 12″ | 28°F | 850 | 25″ | 1 | 130 lbs |
| RUX-233-FA-0086J | 240 | 1 | 34 | 1/4 | 1725 | 12″ | 28°F | 850 | 25″ | 1 | 130 lbs | |
| RUX-233-FA-0086D | 208 | 3 | 23 | 1/4 | 1725 | 12″ | 28°F | 850 | 25″ | 1 | 130 lbs | |
| RUX-233-FA-0086K | 240 | 3 | 20 | 1/4 | 1725 | 12″ | 28°F | 850 | 25″ | 1 | 130 lbs | |
| RUX-233-FA-0086U | 480 | 3 | 10 | 1/4 | 1725 | 12″ | 28°F | 850 | 25″ | 1 | 130 lbs | |
| RUX-233-FA-0086Z | 600 | 3 | 9 | 1/4 | 1725 | 12″ | 28°F | 850 | 25″ | 1 | 130 lbs | |
| RUX-233-FA-0106J | 240 | 1 | 44 |
10 |
1/4 | 1725 | 12″ | 38°F | 850 | 25″ | 1 | 130 lbs |
| RUX-233-FA-0106D | 208 | 3 | 30 | 1/4 | 1725 | 12″ | 38°F | 850 | 25″ | 1 | 130 lbs | |
| RUX-233-FA-0106K | 240 | 3 | 26 | 1/4 | 1725 | 12″ | 38°F | 850 | 25″ | 1 | 130 lbs | |
| RUX-233-FA-0106U | 480 | 3 | 13 | 1/4 | 1725 | 12″ | 38°F | 850 | 25″ | 1 | 130 lbs | |
| RUX-233-FA-0106Z | 600 | 3 | 11 | 1/4 | 1725 | 12″ | 38°F | 850 | 25″ | 1 | 130 lbs | |
| RUX-233-FB-0156D | 208 | 3 | 44 |
15 |
1/4 | 1725 | 16″ | 27°F | 1800 | 45″ | 2 | 169 lbs |
| RUX-233-FB-0156K | 240 | 3 | 38 | 1/4 | 1725 | 16″ | 27°F | 1800 | 45″ | 2 | 169 lbs | |
| RUX-233-FB-0156U | 480 | 3 | 19 | 1/4 | 1725 | 16″ | 27°F | 1800 | 45″ | 2 | 169 lbs | |
| RUX-233-FB-0156Z | 600 | 3 | 16 | 1/4 | 1725 | 16″ | 27°F | 1800 | 45″ | 2 | 169 lbs | |
| RUX-233-FB-0206U | 480 | 3 | 25 |
20 |
1/4 | 1725 | 16″ | 35°F | 1800 | 45″ | 2 | 169 lbs |
| RUX-233-FB-0206Z | 600 | 3 | 21 | 1/4 | 1725 | 16″ | 35°F | 1800 | 45″ | 2 | 169 lbs | |
| RUX-233-FC-0256U | 480 | 3 | 31 |
25 |
1/2 | 1725 | 20″ | 26°F | 3110 | 65″ | 3 | 216 lbs |
| RUX-233-FC-0256Z | 600 | 3 | 25 | 1/2 | 1725 | 20″ | 26°F | 3110 | 65″ | 3 | 216 lbs | |
| RUX-233-FC-0306U | 480 | 3 | 37 |
30 |
1/2 | 1725 | 20″ | 25°F | 3850 | 75″ | 3 | 216 lbs |
| RUX-233-FC-0306Z | 600 | 3 | 30 | 1/2 | 1725 | 20″ | 25°F | 3850 | 75″ | 3 | 216 lbs | |
| RUX-233-FC-0356U | 480 | 3 | 43 |
35 |
1/2 | 1725 | 20″ | 29°F | 3850 | 75″ | 3 | 216 lbs |
| RUX-233-FC-0356Z | 600 | 3 | 35 | 1/2 | 1725 | 20″ | 29°F | 3850 | 75″ | 3 | 216 lbs |
50 Hz Models & Specifications
| ITEM INFORMATION
CATALOG NO. |
VOLTS |
ELECTRICAL DATA
PHASE TOTAL AMPS* |
KW |
HP |
MOTOR
RPM FAN BLADE DIAMETER |
RISE** |
AIR FLOW
CFM THROW |
FRAME SIZE |
SHIP WT. |
| RUX-233-FA-0036E | 220 | 1 | 14 |
2.5 |
1/4 | 1438 | 12″ | 14°F | 550 | 13″ | 1 | 130 lbs |
| RUX-233-FA-0036F | 220 | 3 | 9 | 1/4 | 1438 | 12″ | 14°F | 550 | 13″ | 1 | 130 lbs | |
| RUX-233-FA-0036G | 380 | 3 | 6 | 1/4 | 1438 | 12″ | 14°F | 550 | 13″ | 1 | 130 lbs | |
| RUX-233-FA-0036H | 400 | 3 | 6 | 1/4 | 1438 | 12″ | 14°F | 550 | 13″ | 1 | 130 lbs | |
| RUX-233-FA-0036I | 415 | 3 | 5 | 1/4 | 1438 | 12″ | 14°F | 550 | 13″ | 1 | 130 lbs | |
| RUX-233-FA-0056E | 220 | 1 | 21 |
4.2 |
1/4 | 1438 | 12″ | 24°F | 550 | 13″ | 1 | 130 lbs |
| RUX-233-FA-0056F | 220 | 3 | 13 | 1/4 | 1438 | 12″ | 24°F | 550 | 13″ | 1 | 130 lbs | |
| RUX-233-FA-0056G | 380 | 3 | 9 | 1/4 | 1438 | 12″ | 24°F | 550 | 13″ | 1 | 130 lbs | |
| RUX-233-FA-0056H | 400 | 3 | 8 | 1/4 | 1438 | 12″ | 24°F | 550 | 13″ | 1 | 130 lbs | |
| RUX-233-FA-0056I | 415 | 3 | 7 | 1/4 | 1438 | 12″ | 24°F | 550 | 13″ | 1 | 130 lbs | |
| RUX-233-FA-0076E | 220 | 1 | 31 |
6.3 |
1/4 | 1438 | 12″ | 28°F | 700 | 22″ | 1 | 130 lbs |
| RUX-233-FA-0076F | 220 | 3 | 19 | 1/4 | 1438 | 12″ | 28°F | 700 | 22″ | 1 | 130 lbs | |
| RUX-233-FA-0076G | 380 | 3 | 12 | 1/4 | 1438 | 12″ | 28°F | 700 | 22″ | 1 | 130 lbs | |
| RUX-233-FA-0076H | 400 | 3 | 11 | 1/4 | 1438 | 12″ | 28°F | 700 | 22″ | 1 | 130 lbs | |
| RUX-233-FA-0076I | 415 | 3 | 10 | 1/4 | 1438 | 12″ | 28°F | 700 | 22″ | 1 | 130 lbs | |
| RUX-233-FA-0096E | 220 | 1 | 40 |
8.4 |
1/4 | 1438 | 12″ | 38°F | 700 | 22″ | 1 | 130 lbs |
| RUX-233-FA-0096F | 220 | 3 | 24 | 1/4 | 1438 | 12″ | 38°F | 700 | 22″ | 1 | 130 lbs | |
| RUX-233-FA-0096G | 380 | 3 | 15 | 1/4 | 1438 | 12″ | 38°F | 700 | 22″ | 1 | 130 lbs | |
| RUX-233-FA-0096H | 400 | 3 | 13 | 1/4 | 1438 | 12″ | 38°F | 700 | 22″ | 1 | 130 lbs | |
| RUX-233-FA-0096I | 415 | 3 | 13 | 1/4 | 1438 | 12″ | 38°F | 700 | 22″ | 1 | 130 lbs | |
| RUX-233-FB-0136F | 220 | 3 | 35 |
12.5 |
1/4 | 1438 | 16″ | 26°F | 1500 | 39″ | 2 | 169 lbs |
| RUX-233-FB-0136G | 380 | 3 | 21 | 1/4 | 1438 | 16″ | 26°F | 1500 | 39″ | 2 | 169 lbs | |
| RUX-233-FB-0136H | 400 | 3 | 19 | 1/4 | 1438 | 16″ | 26°F | 1500 | 39″ | 2 | 169 lbs | |
| RUX-233-FB-0136I | 415 | 3 | 18 | 1/4 | 1438 | 16″ | 26°F | 1500 | 39″ | 2 | 169 lbs | |
| RUX-233-FB-0176F | 220 | 3 | 46 |
16.7 |
1/4 | 1438 | 16″ | 35°F | 1500 | 39″ | 2 | 169 lbs |
| RUX-233-FB-0176G | 380 | 3 | 28 | 1/4 | 1438 | 16″ | 35°F | 1500 | 39″ | 2 | 169 lbs | |
| RUX-233-FB-0176H | 400 | 3 | 25 | 1/4 | 1438 | 16″ | 35°F | 1500 | 39″ | 2 | 169 lbs | |
| RUX-233-FB-0176I | 415 | 3 | 24 | 1/4 | 1438 | 16″ | 35°F | 1500 | 39″ | 2 | 169 lbs | |
| RUX-233-FC-0216G | 380 | 3 | 33 |
21 |
1/2 | 1438 | 20″ | 26°F | 2600 | 57″ | 3 | 216 lbs |
| RUX-233-FC-0216H | 400 | 3 | 32 | 1/2 | 1438 | 20″ | 26°F | 2600 | 57″ | 3 | 216 lbs | |
| RUX-233-FC-0216I | 415 | 3 | 31 | 1/2 | 1438 | 20″ | 26°F | 2600 | 57″ | 3 | 216 lbs | |
| RUX-233-FC-0256G | 380 | 3 | 39 |
25 |
1/2 | 1438 | 20″ | 30°F | 2600 | 57″ | 3 | 216 lbs |
| RUX-233-FC-0256H | 400 | 3 | 37 | 1/2 | 1438 | 20″ | 30°F | 2600 | 57″ | 3 | 216 lbs | |
| RUX-233-FC-0256I | 415 | 3 | 36 | 1/2 | 1438 | 20″ | 30°F | 2600 | 57″ | 3 | 216 lbs |
Factory Built-in Options
| CATALOG NO. | OPTION DESCRIPTION | |
| D | Disconnect Switch | Factory installed on the unit heater above the control enclosure. This is an inexpensive and positive way to meet NEC/CEC requirements for a disconnecting means within sight of the heater. |
| E | Group E (Metal Dust) Construction | Class II, Group E (Metal Dust) Construction Temperature Code T3C, 320° F (160°C). |
| K | “Warning” Pilot Light | Indicates when the thermal cutouts have tripped and the unit heater needs servicing.
Not available with combination V & L. |
| L | “Heater On” Pilot Light | Indicates when the electric heating elements are energized. Not available with combination V & K |
| M | Manual Reset Thermal Cutout with Backup Contactor | A pilot duty manual reset thermal cutout with a backup contactor is provided for independent secondary overtemperature protection. Cannot be installed with S, S1 or V. |
| S | Auto/Fan Selector Switch | A two-position switch wired to the control circuit for auto (automatic heat) and fan only control.
Cannot be installed with M, V or S1. |
| S1 | Built-In Controls for Remote Auto/Fan Selector Switch | Unit is prewired for field addition of remote auto/fan selector switch.
Cannot be installed with M, V or S. |
| T | Adjustable Thermostat | Factory installed and prewired to the control enclosure. Thermostat is adjustable from 50° to 90° F (10° to 32°C). |
| T1 | Adjustable Thermostat for Wet Locations | Factory installed and prewired to the control enclosure. Thermostat is adjustable from 40° to 80° F (5° to 25°C). Can be specified for all constructions. |
| V | 120 Volt Control Circuit | Can be provided when required for special external thermostat circuit.
Cannot be installed with S, S1, M or the combination of both K & L together. |
Note: Both pilot lights (K & L) are not available with 120V option (V). Only one pilot light can be ordered with 120V control heaters.
Standard Mounting Kits
| CATALOG NO. | DESCRIPTION |
| 1022451 | Ceiling Mounting Kit |
| 1022454 | Wall Mounting Kit |
| 1022457 | Pole Mounting Kit |
Note: One kit required per heater. Work with all frame sizes
Accessory Remote Thermostats
| CATALOG NO. | SWITCH TYPE | TYPE | RATING | TEMP RANGE | DESCRIPTION |
| 1007002 | Bimetal | SPDT | 125–277V, 22A | 50°–90°F (10°–32°C) | Class 1, Div. 1, Groups C & D. Class II, Div. 1, Groups E, F, & G |
| BX-1024754 |
Bulb and Capillary with Internal Set Point Adjustment |
SPDT | 120–240V, 25A
277V, 22A |
40°–120°F (5°–49°C) | Class 1, Div. 1, Groups B, C & D. Class II, Div. 1, Groups E, F, & G |
| BX-1025396 | SPST | 120–240V, 25A
277V, 22A |
40°–120°F (5°–49°C) | Corrosion-Resistant Class 1, Div. 1, Groups B, C, & D. Class II, Div. 1, Groups E, F & G | |
| 1036506 | Bimetal | SPDT | 480V, 15A | 40°–80°F (5°–25°C) | Class I, Div. 1, Groups C & D. Class II, Div. 1, Groups E, F, & G. Class III. IP66, Type 4 |
Remote Fan Switch
| CATALOG NO. | SWITCH TYPE | RATING | HUBS | DESCRIPTION |
| 1001744 | 2-Position | 120/277V, 30A |
(2) 3/4″ NPT Hubs |
Class I, Div. 1, Groups C & D. Class II, Div. 1, Groups E, F, & G. Class III |
| 1031042 | 2-Position | 110V, 6A | Class I, Div. 1, Groups C & D. Class II, Div. 1, Groups E, F, & G. Class III. NEMA 4X |
Dimensions and Clearances
How to Order
Example
- Round up to the nearest whole kW
- For custom requests, contact Marley sales representative for assistance and additional detail
- Option Code “H” indicates 50 Hz Heater Contact Marley Sales Representative for additional configuration details
No matter the industry or application, Marley Engineered Products has a robust portfolio of innovative, reliable, high-performance comfort heating and ventilation solutions for all your heating needs. For more information or assistance on your next project, contact Technical Services at 800-642-4328
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FAQs
What should I do if the unit heater fails to turn on?
Check the power supply, thermostat settings, and ensure all connections are secure. If issues persist, contact a certified technician for further inspection.
Can this unit heater be used in outdoor environments?
The unit is designed for indoor use in specified hazardous locations as mentioned in the manual. Outdoor usage may require additional protective measures.
Documents / Resources
 |
BerkoMEP RUX Series Explosion Proof Unit Heater [pdf] User Manual RUX Series Explosion Proof Unit Heater, RUX Series, Explosion Proof Unit Heater, Unit Heater, Heater |