HAZLOC Heater Systems

Manufacturer of Industrial Unit Heaters for hazardous and severe-duty locations

CRG Boiler Systems also offers the HAZLOC heaters configurations for rugged conditions and inclement weather locations. The HAZLOC line of heating applications delivers climate control solutions through heating systems for asset protection solutions and improved work environment conditions. CRG regards the HAZLOC line of heating applications as a "Tier One" product selection for meeting industry demands in the most of uncompromising elements.

XEU1 Explosion Proof Electric Air Heater

The XEU1 series of explosion-proof electric unit heaters are designed to meet U.S. and Canadian certification standards. The three sizes of XEU1 heaters include our ExCaliber™ high performance liquid-to-air heat-exchanger cores that are available in 27 model choices of voltage and heat output combinations to meet your specific requirements.

Literature

Download the XEU1 Brochure


Download PDF

XEU1 Data Section

Introduction

The XEU1 series of explosion-proof electric air heaters is designed to meet the most demanding requirements of heavy industry. The harsh operating conditions of this industry require heating equipment that is safe, reliable, dependable, and available when you need it. XEU1 unit heaters are designed to provide primary or supplementary heating for comfort or freeze protection in areas that are classified ed as hazardous locations.

Designed for hazardous locations!

All Hazloc Heaters™ XEU1 models are designed to meet U.S. and Canadian certification standards. The three sizes of XEU1 heaters include our ExCaliber™ high performance liquid-to-air heat-exchanger cores that are available in 27 model choices of voltage and heat output combinations to meet your specific requirements.

The rugged and versatile XEU1 heater incorporates a high quality immersion heater, high performance fan and motor assembly, a sturdy 14 GA steel cabinet with epoxy/polyester powder-coating for corrosion resistance, large control enclosure with an extra port for convenient wiring of an external room thermostat, and enclosure O-rings to minimize moisture ingress.

XEU1 heaters are suitable for a wide variety of applications that include but are not limited to oil & gas drilling rigs, petrochemical facilities, refineries, chemical storage and handling facilities, paint storage areas, sewage treatment plants, aircraft servicing areas, grain elevators, coal preparation areas, and areas containing metal dusts.

Rugged design, but easily maintained!

All XEU1 heaters are designed for industrial applications with all features being heavy-duty to meet your most demanding environments and long-life expectations. Even with heavy-gauge steel construction used throughout the heater it does not inhibit maintenance of the product since the XEU1 has been designed for easy field servicing with a removable heat exchanger core assembly, split fan guard, and replaceable automatic and manual reset high-limits. An added benefit is our 36-month heater warranty!

Maximum durability… rugged fin tubes!

All XEU1 ExCaliber™ liquid-to-air heat-exchanger cores are evacuated & sealed and are constructed using rugged carbon-steel tubes with copper free, roll-formed aluminum fins to maximize heat transfer and carbon-steel headers for maximum durability, resistance to corrosion, and longer life in your demanding applications.

Features

Suitable for the following hazardous location classifications:

• Class I, Divisions 1 & 2, Groups C & D, T3B
• Class II, Divisions 1 & 2, Groups F & G, T3B
• Class I, Zones 1 & 2, Groups IIA & IIB, T3

The ExCaliber™ evacuated and sealed liquid-to-air heat exchanger core is constructed using rugged, copper-free, roll-formed aluminum fins and protected by a vent relief valve, automatic reset high limit, and a back-up manual reset high limit. The XEU1 heater has the highest air temperature rise, on average, in the industry across our complete kW range.

ExCaliber™ heat-exchanger core is easy to remove

Model Coding

XEU1 Model Coding

*Hazloc Heaters Inc. recommends the 24 volt built-in control circuit option on our XEU1 heaters due to increased safety.

The When ordering refer to Page 7 and then please follow the “Model Code Sequence Required for Ordering” format above to specify base model, motor voltage, phase, frequency and also specify hazardous location area rating required (eg. suitable for Class I, Div.1, Group D; T3B or Class I, Zone 1, Group IIA; T3)

Example Model Code: XEU1-12-100-480360-A-T

Specifications and Dimensions

XEU1 Specifications By Model Size

Model
  XEU1-12
XEU1-16
XEU1-20
Fan diameter
in (mm) 12 (304.8)
16 (406.4)
20 (508.0)
Nominal kW
  5 7.5 10 15 20 25 30
Air delivery
cfm 400
680
600
1019
800
1359
1200
2039
1700
2888
2100
3568
3000
5097
m³/hr
Approx. air velocity
fpm 479
2.4
718
3.6
958
4.9
808
4.1
1145
5.8
916
4.6
1309
6.6
m/s
Approx. horizontal air throw
ft 15
4.6
22
6.7
30
9.1
33
10.1
46
14.0
41
12.5
61
18.6
m
Motor power
hp (watts) ¼ (186)
¼ (186)
½ (373)
Max. mounting height
(to underside of heater)
ft 7
2.1
7.5
2.3
9.5
2.9
10
3.0
11
3.4
12
3.6
15
4.6
m
Approx. net weight
(without disconnect)
(with disconnect)
  129 (58.5)
142 (64.4)
133 (60.3)
146 (66.2)
161 (73.0)
174 (78.9)
192 (87.1)
205 (92.9)
lbs (kg)
lbs (kg)
Approx. shipping weight
(without disconnect)
(with disconnect)
  203 (92.1)
216 (97.8)
207 (93.9)
220 (99.8)
235 (106.6)
248 (112.5)
286 (129.7)
299 (135.6)
lbs (kg)
lbs (kg)

XEU1 Physical Dimensions

Heater
Size
12
(5-10kW)
16
(15-20kW)
20
(25-30kW)
Dim.
Inches
(mm)
Inches
(mm)
Inches
(mm)
A 7.5
7.5 7.5
(190.5) (190.5) (190.5)
B 18.19 22.28 26.2
(462) (566) (667)
C
16.3 20.28 24.29
(414) (515) (617)
D 19 23 27
(483) (584) (686)
E 19.45 23.46 27.44
(494) (596) (697)
F 3.1 5.1 7.1
(79) (130) (180)
G 22.25 22.25 23.25
(565) (565) (591)
Specifications by Model Size
  Certification
CSAC/US  - Certified to Canadian and U.S. standards
Approvals
North American Hazardous Location Classifications
Class I, Divisions 1 & 2, Groups C & D
Class II, Divisions 1 & 2, Groups F & G
T3B
Class I, Zones 1 & 2, Groups IIA & IIB, T3
Temperature code
Division System - T3B 165°C (329°F);
Zone System - T3 200°C (392°F)
Cabinet
Cabinet material
14-gauge (0.075 in.) (1.9 mm) steel. Yellow epoxy/polyester powder coated
with five-stage pretreatment, including iron phosphate.
Fan guard
Split design with close wire spacing. A 3/8 in. (9.5 mm) diameter probe
will not enter. Black polyester powder coated.
Louver blades
Anodized extruded aluminum.
Conduit materials
& fittings
Plated steel and aluminum alloy for corrosion resistance.
Fasteners
Zinc plated steel for corrosion resistance.
Enclosure
Cast aluminum (non-copper alloy) NEMA Type 7 & 9 with O-ring.
Mounting holes
9/16" diameter holes – Four located on the top face of heater.
Motor/Fan
Motor type
Explosion-proof, thermally protected, 1725 RPM permanently lubricated
ball bearing type with 56 frame and “easy-off” fan blade replacement
feature.
Fan
Three-blade aluminum, steel spider and hub with 5/8 in. bore.
Heat
Exchanger
Heating elements
Long-life, low watt-density, high grade metal-sheathed
Heat transfer fluid
Ethylene glycol and water including corrosion inhibitors.
Header material
Carbon steel.
ExCaliber™ Core
Carbon steel shells and carbon steel tubes with copper-free,
roll-formed aluminum fins @ 10 fins per in. Evacuated and sealed.
Sprayed with black, high heat enamel paint.
Protection
Temperature high limits
One automatic reset rated for 100,000 cycles, and one manual
reset. Both are snap-action bimetal type, open on temperature rise.
Pressure relief
Preset 100 psig (689 kPa) aluminum body pressure relief valve.
Controls
Control circuit
Built in 120 V control. Optional 24V control available.
Control contactor
40 amp. Rated for 500,000 mechanical operations.
Control transformer
Multitap primary, 120V or 24V secondary.
Fuse protection
Thermal delay fuse (spare included).
Room thermostat
(optional)
Built in, TBX1 explosion-proof thermostat, 40°F to 80°F (5°C to 27°C)
Load
Isolation
Disconnect switch
(optional)
Built-in, XDC-01 explosion-proof disconnect switch, 600V, 50A max with lock-
out feature. This disconnect switch is also available in a wall mount version.
Operating
Limits
Ambient temperature
-49°F to 104°F (-45°C to 40°C).
Maximum altitude ASL
10,000 ft (3048 m).
Heater Performance Data
kW
(btu/hr)
Line
Volts
Ø
Fan
Dia. in.
Model
See page 4 to complete model coding
Total
Amps
A
Air Temp.
Rise
°F
°C
5
(17060)
208 1 12 XEU1-12-050-208160 * 26.5 38.1 21.2
240 1 12 XEU1-12-050-240160 * 23.3 38.1 21.2
208 3 12 XEU1-12-050-208360 * 14.6 38.1 21.2
240 3 12 XEU1-12-050-240360 * 12.7 38.1 21.2
480 3 12 XEU1-12-050-480360 * 6.7 38.1 21.2
600 3 12 XEU1-12-050-600360 * 5.5 38.1 21.2
7.5
(25590)
208 1 12 XEU1-12-075-208160 * 38.6 40.4 22.4
240 1 12 XEU1-12-075-240160 * 33.8 40.4 22.4
208 3 12 XEU1-12-075-208360 * 21.5 40.4 22.4
240 3 12 XEU1-12-075-240360 * 18.7 40.4 22.4
480 3 12 XEU1-12-075-480360 * 9.7 40.4 22.4
600 3 12 XEU1-12-075-600360 * 7.9 40.4 22.4
10
(34120)
240 1 12 XEU1-12-100-240160 * 44.2 38.8 21.6
208 3 12 XEU1-12-100-208360 * 28.5 38.8 21.6
240 3 12 XEU1-12-100-240360 * 24.8 38.8 21.6
480 3 12 XEU1-12-100-480360 * 12.7 38.8 21.6
600 3 12 XEU1-12-100-600360 * 10.3 38.8 21.6
15
(51180)
208 3 16 XEU1-16-150-208360 * 42.3 39.1 21.7
240 3 16 XEU1-16-150-240360 * 36.8 39.1 21.7
480 3 16 XEU1-16-150-480360 * 18.7 39.1 21.7
600 3 16 XEU1-16-150-600360 * 15.1 39.1 21.7
20
(68240)
480 3 16 XEU1-16-200-480360 * 24.8 37.3 20.7
600 3 16 XEU1-16-200-600360 * 19.9 37.3 20.7
25
(85300)
480 3 20 XEU1-20-250-480360 * 31.1 37.5 20.8
600 3 20 XEU1-20-250-600360 * 25.1 37.5 20.8
30
(102360)
480 3 20 XEU1-20-300-480360 * 37.1 31.5 17.5
600 3 20 XEU1-20-300-600360 * 29.9 31.5 17.5
Nomenclature + Useful Formulas + Conversions
AC/DC Formulas
To Find
Direct Current
AC - 1 phase
AC - 3 phase
Amps when
horsepower is known
HP x 746
E x Eff
  HP x 746 
E x Eff x PF
        HP x 746       
1.73 x E x Eff x PF
Amps when
kilowatts is known
kW x 1000
E
kW x 1000
E x PF
  kW x 1000 
1.73 x E x PF
Amps when kVA is known
KVA x 1000
E
kVA x 1000
E
kVA x 1000
1.73 x E
Kilowatts
I x E
1000
I x E x PF
1000
I x E x 1.73 PF
1000
Kilovolt-Amps
I x E
1000
I x E
1000
I x E x 1.73
1000
Horsepower (output)
I x E x Eff
746
I x E x Eff x PF
746
I x E x Eff x 1.73 x PF
746
XEU1 Engineering Specifications
1.0 General

1.1 The explosion-proof unit heater(s) shall be supplied and installed in accordance with the plans and specifications, with ratings as listed in the schedule of electrical heating equipment, and shall be Hazloc Heaters’ XEU1 series.

1.2 The unit heater(s) shall be CSAC/US certified for use in Class I, Divisions 1 & 2, Groups C & D; Class II, Divisions 1 & 2, Groups F & G; and Class I, Zones 1 & 2, Groups IIA & IIB Hazardous Locations and shall be rated for National Electric Code and Canadian Electric Code Temperature Code T3B, 165°C (329°F) for Division System and T3, 200°C (392°F) for Zone System.

2.0 Heat Exchanger

2.1 The Heat Exchanger shall be a liquid-to-air type consisting of steel tubes with integral aluminum fins @ 10 fins per inch and be evacuated, sealed and painted with black, high heat enamel.

2.2 The Heat Exchanger shall be protected by a preset 100 psig (689 kPa) pressure-relief valve, aluminum body, with no serviceable parts.

2.3 The Heat Exchanger shall be filled and sealed to design level with a custom-blended, long-life solution of ethylene-glycol and water including inhibitors to provide superior corrosion protection.

2.4 The Heat Exchanger shall include heavy-duty immersion heating elements brazed into a heavy steel flange. The elements shall consist of high-quality resistance wire embedded in a magnesium oxide refractory and sheathed in a metal tubing. The heater is to be protected by two snap-action bimetal temperature high-limit cutouts. The primary high-limit shall be an automatic reset type rated for 100,000 cycles, and the secondary high-limit a manual reset type and will shut off the heater if the fl uid temperature rises due to a lack of heat dissipation. The high-limits shall not be effected by altitude or changes in atmospheric pressure.

3.0 Fan and Motor Assembly

3.1 The Fan Assembly shall include a ball bearing, permanently lubricated, thermally protected explosion-proof motor rated for continuous duty at 40°C (104°F). The motor shaft shall provide a method for easy field replacement of fan blade assembly without the use of special tools.

3.2 The Fan shall be aluminum to prevent sparking. The Fan shall be directly connected to the motor, dynamically balanced, and designed specifically for the heater application.

3.3 The Fan shall be shielded with a heavy-duty steel wire, polyester-coated guard. To provide easy maintenance and cleaning of the fan and motor, the fan guard shall be of a two piece construction. The guard shall not allow a 3/8 in. (9.5 mm) probe to enter.

XEU1 Engineering Specifications (Continued)
4.0 Control Center

4.1 The Control Center shall be completely factory pre-wired and tested, and enclosed in a NEMA 7 and 9 explosion-proof control enclosure with O-ring and a large threaded cover for easy access.

4.2 The Control Center shall include a 40 amp magnetic contactor sized to handle the heater and motor current, and shall be rated for 500,000 cycles operation. The encapsulated severe-duty coil shall be rated 120V or 24V (specify one) and separately fuse protected.

4.3 The Control Center shall include a control voltage transformer, the primary voltage being the same as the heater voltage and the secondary to be 120V or 24V (specify one).

4.4 The Control Center shall include a terminal block for remote thermostat connection.

4.5 The Control Center shall include in-line thermal delay fuse protection on secondary side of transformer. The fuse holder shall be mounted on the printed circuit board and contain both an operating fuse and a spare fuse.

5.0 Cabinet Assembly

5.1 The Cabinet Assembly shall be fabricated from 14 gauge steel with a baked epoxy/polyester powder coating over a 5-stage pretreatment including iron phosphate for protection from corrosive atmospheres.

5.2 The Cabinet shall include four 9/16 inch (14.3 mm) mounting holes located on top face of heater.

5.3 Louver blades shall be individually adjustable and made of anodized extruded aluminum.

6.0 Mounting Brackets

6.1 The heater shall be provided with a steel Mounting Bracket , with wet applied black enamel paint, specifically designed to bear the weight of the heater assembly.

6.2 The Mounting Bracket shall be - (select one):

• Type WMB - Wall Mounting Bracket

• Type BMB - Basic Mounting Bracket

• Type PMB - Pipe Mounting Bracket

• Type HMB - Hanging Mounting Bracket

7.0 Room Thermostat Options

7.1 The heater shall be supplied with (select one):

• Built-in TBX1 explosion-proof room thermostat mounted on the control enclosure side of the heater.

• Field installed remote mount TBX1 explosion-proof thermostat.

8.0 Disconnect Switch Options

8.1 The heater shall be supplied with (select one):

• Built-in XDC-01 explosion-proof disconnect switch mounted on the control enclosure side of the heater.

• Field installed remote mount XDC-01 explosion-proof disconnect switch.

Hazardous Location Definitions

Class I - Flammable Gases, Vapors or Liquids


Class I Area Classification

Division 1

Where ignitable concentrations of flammable gases, vapors or liquids can exist all of the time or some of the time under normal operating conditions.


Division 2

Where ignitable concentrations of flammable gases, vapors or liquids are not likely to exist under normal operating conditions.

Zone 0

Where ignitable concentrations of flammable gases, vapors or liquids are present continuously or for long periods of time under normal operating conditions.

Zone 1

Where ignitable concentrations of flammable gases, vapors or liquids are likely to exist under normal operating conditions.

Zone 2

Where ignitable concentrations of flammable gases, vapors or liquids are not likely to exist under normal operating conditions.

Class I Groups (Typical Examples)

Division 1 & 2

• A (acetylene)
• B (hydrogen)
• C (ethylene)
• D (propane)

Zone 0, 1 & 2

• IIC (acetylene & hydrogen)
• IIB (ethylene)
• IIA (propane)

Class II - Combustible Dusts

Class II Area Classification


Division 1

Where ignitable concentrations of combustible dusts can exist all of the time or some of the time under normal operating conditions.


Division 2

Where ignitable concentrations of combustible dusts are not likely to exist under normal conditions.

Class II Area Classification


Division 1 & 2

• E (metals - Division 1 only)
• F (coal)
• G (grain)

Class III - Ignitable Fibers & Flyings

Class III Area Classification


Division 1

Where easily ignitable fibers or materials producing combustible flyings are handled, manufactured or used.


Division 2

Where easily ignitable fibers are stored or handled.

Class III Area Classification


Division 1 & 2

None

Temperature Codes


Class I Temperature Code

Division 1 & 2

• T1 (≤450°C)
• T2 (≤300°C)
• T2A, T2B, T2C, T2D
(≤280°C, ≤260°C, ≤230°C, ≤215°C)
• T3 (≤200°C)
• T3A, T3B, T3C
(≤180°C, ≤165°C, ≤160°C)
• T4 (≤135°C)
• T4A (≤120°C)
• T5 (≤100°C)
• T6 ((≤85°C)

Class I Temperature Code

Zone 0, 1 & 2

• T1 (≤450°C)
• T2 (≤300°C)



• T3 (≤200°C)




• T5 (≤100°C)
• T6 ((≤85°C)

Class II Temperature Code

Division 1 & 2

• T1 (≤450°C)
• T2 (≤300°C)
• T2A, T2B, T2C, T2D
(≤280°C, ≤260°C, ≤230°C, ≤215°C)
• T3 (≤200°C)
• T3A, T3B, T3C
(≤180°C, ≤165°C, ≤160°C)
• T4 (≤135°C)
• T4A (≤120°C)
• T5 (≤100°C)
• T6 ((≤85°C)

Class III Temperature Code

Division 1 & 2

None. Note: Article 503 of the NEC limits the maximum temperature for Class III equipment to 165°C for equipment not subject to overloading and to 120°C for equipment that may be overloaded.

Additional Products & Warranty
Additional Products Available

SRH
The SRH series of heat-exchanger unit heaters is designed for steam applications on drilling rigs and is designed for pressures up to 100 psi. Meets ASME requirements with a CRN.

HUH
The HUH series of heat-exchanger unit heaters is designed for steam, hot water, glycol or other fl uid circulating heating systems. Suitable for pressures and temperatures up to 400 psi and 550 °F respectively. Meets ASME requirements with a CRN.

HHP
The HHP high performance series of heat-exchanger unit heaters is designed for steam, hot water, glycol or other fluid circulating heating systems. Suitable for pressures and temperatures up to 4 psi and 550 °F respectively. Meets ASME requirements with a CRN.

Limited 36-Month Warranty

Hazloc Heaters™ warrants all XEU1 series of explosion-proof electric heaters against defects in materials and workmanship under normal conditions of use for a period of thirty-six (36) months from date of purchase based on the following terms:
• 1. The heater must not be modified ed in any way.
• 2. The heater must be stored, installed and used only in accordance with the owner’s manual and attached data plate information.
• 3. Replacement parts will be provided free of charge as necessary to restore any unit to normal operating condition, provided that the defective parts be returned to us freight prepaid and that the replacement parts be accepted freight collect.
• 4. The complete heater may be returned to our manufacturing plant for repair or replacement (at our discretion), freight charges prepaid.
• 5. Contamination by dirt, dust, etc. or corrosion will not be considered as defects.
• 6. This warranty shall be limited to the actual equipment involved and, under no circumstances, shall include or extend to installation or removal costs, or to consequential damages or losses.