1.0 GENERAL INFORMATION
Part No. 11110 - Rev. 02
Edmonton Head Ofce & Factory
5918 Roper Road, Edmonton, Alberta, Canada T6B 3E1
P 780.466.3178 F 780.468.5904 Toll Free 1.800.661.8529
info@ccithermal.com www.ccithermal.com
Installation, Operation & Maintenance Instructions for
NorsemanTM XGB Explosion-Proof Unit Heater
3.75 - 35kW, 60 Hz Units
STANDARD PRODUCT FEATURES
DESCRIPTION
CCI Thermal’s XGB explosion-proof unit heater is the latest addition
to the NORSEMAN™ line of hazardous location heating products.
The small cabinet units are available with ratings from 3.75 – 10kW,
and can be identied by their internally mounted motor. The large
cabinet units (shown below) are available from 10kW up to 35kW.
See section 3.1 for cabinet dimensions.
GLYCOL
FREE
DESIGN
APPLICATION
Designed specically for heating industrial spaces where potentially
explosive substances are or may be present. Typical hazardous
location environments include:
• Water and Sewage Treatment Plants
• Oil Reneries
• Compressor Stations
• Pulp and Paper Mills
• Paint Storage Booths
• Cement Plants
• Mines
• CSA C/US Certied for hazardous locations. Small cabinet units
approved for Class I, Div 1 & 2, Group D; Class II, Div. 1 & 2,
Groups E, F and G. Large cabinet units approved for Class I, Div.
1 & 2, Groups C & D; Class II, Div. 1 & 2, Groups E, F & G.
Note: Class II and some atmospheric groups are not available in
every kW rating.
• Optional Zone marking available.
• Ratings from 3.75 – 35kW.
• 208 – 600V, 1 or 3 phase
• Low watt density extra heavy wall tubular steel nned heating
elements with nickel plated nish
• Glycol-free design allows the heater to be tilted 30º downward
• Rotatable outlet louvers provide 35º of additional airow
redirection
• Patented x-Max® housing with track and trolley system simplies
installation and servicing
• Heavy duty 16 ga. Stainless steel casing
• Terminals for remote thermostat connection
• Dual automatic reset high limits
• Contactor derated for extended service life
• Isolated supply connection housing eliminates the need for
conduit seals
OPTIONAL FEATURES
• Built-in, externally adjustable thermostat
• Built-in disconnect
• Moisture-resistant construction
• “Auto/off/fan-only” switch
• Pilot light
• Manual reset high limit
THERMOSTATS
CONSTRUCTION AND INSTALLATION
CCI Thermal’s NORSEMAN™ unit heaters use extra heavy wall
nned tubular steel heating elements to provide safe, efcient heat
transfer to the environment. The heater does not contain glycol,
decreasing maintenance costs.
Flow adjustment… in structures with high ceilings, other units may
not have the range of motion needed to direct air ow to the oor.
The glycol-free design of the XGB allows the unit to be tilted to
a 30º angle below the horizontal, with an additional 35º of airow
redirection provided by the outlet louver. For lateral airow, the
entire louver assembly can be rotated 90º.
No conduit seal required… a factory installed conduit seal provides
the necessary isolation between the supply and control housings.
In Division 2, Zone 1 and Zone 2 applications, a eld installed
conduit seal may not be required.
Simplied wiring… to facilitate installation, the NORSEMAN™
explosion-proof unit heaters feature the patented x-Max® housing
with slide out terminal block trolley for connection of the electrical
supply.
CCI Thermal offers a wide variety of explosion-proof thermostats
to suit most every need. NORSEMAN™ unit heaters are available
with optional built-in, externally adjustable, bulb type thermostats
which are eld-convertible to tamper-proof. Thermostats for remote
mounting can also be provided on request.
MOTORS
Fractional horsepower, 1725 rpm explosion-proof motor with double
shielded ball bearings and built-in thermal overload. Small cabinet
units use 1/12 hp motor approved for Class I, Group D; Class II,
Group E, F, and G. Large cabinet units use 1/2 hp motor approved
for Class I, Groups C and D; Class II, Groups E, F & G, as standard.
ACCESSORIES
NORSEMAN™ explosion-proof unit heaters readily adapt to most
mounting requirements. Each heater is equipped with a basic swivel
bracket that is compatible with any of the optional mounting kits.
Optional mounting kits allow the unit to be installed on a wall ceiling,
3” pipe, or oor stand. Each mounting conguration provides
maximum exibility for outlet ow direction. The swivel bracket
(standard on all heaters) features holes for afxing a safety chain.
Figure 2 - XGB Heater Dimensions
2.0 PRE-INSTALLATION
2.1 Inspect the heater for possible damage due to shipping and
handling. Claims for shipping damages shall be placed with the
carrier.
2.2 Check the heater nameplate to ensure that the heater area
classification and temperature code are suitable for the hazardous
area classification.
2.3 Verify that the nameplate voltage, phase and wattage are as
ordered and are the same as the electrical power supply available.
DO NOT CONNECT THE XGB UNIT HEATER TO A SUPPLY
VOLTAGE OTHER THAN THAT SHOWN ON THE PRODUCT
NAMEPLATE.
3.0 INSTALLATION AND MOUNTING
The heater must be installed by qualified personnel in strict
compliance with the electrical code.
3.1 DIMENSIONS
Table 1: Dimensions and Weights (See Fig. 2)
C
A
B
A B C D1 D2 Weight
lbs (kg)
Small 16-7/ 8 8-7/ 8 25-3-/ 16 17-1/2 - 100
Cabinet (429) (225) (640) (445) (45)
10-15 kW
Large 20-1/ 8 8-7/ 8 29-1/ 4 - 31-1/ 4 145 (66)
Cabinet (511) (225) (743) (794) 20-35 kW
185 (84)
Part No. 11110 - Rev. 02
STANDARD FEATURES, SMALL CABINET UNIT:
1) 1/12 hp explosion-proof motor
2) Inlet guard
3) Extra heavy wall tubular steel nned heating elements with
nickel plated nish
4) Patented x-Max® explosion-proof terminal housing
5) 120V control circuit includes:
• Derated magnetic contactor
• Dual automatic reset high limits
• Transformer
6) Heavy duty 16 ga. stainless steel casing
7) Outlet louver assembly
8) Swivel bracket
9) Factory installed conduit seal
10) Supply connection housing
11) Terminal block for supply wiring and thermostat connection
Figure 1A - Small Cabinet XGB Unit Heater Components
STANDARD FEATURES, LARGE CABINET UNIT:
1) 1/2 hp explosion-proof motor
2) Inlet wire guard
3) Extra heavy wall tubular steel nned heating elements with
nickel plated nish
4) Patented x-Max® explosion-proof terminal housing
5) 120V control circuit includes:
• Derated magnetic contactor
• Dual automatic reset high limits
• Transformer
• Fan delay relay
• Control fuse
6) Heavy duty 16 ga. stainless steel casing
7) Outlet louver assembly
8) Swivel bracket
9) Factory installed conduit seal
10) Supply connection housing
11) Terminal block for supply wiring and thermostat connection
12) Motor mount
13) Motor mount casing
Figure 1B - Large Cabinet XGB Unit Heater Components
2.0 PRE-INSTALLATION
2.1 Inspect the heater for possible damage due to shipping and
handling. Claims for shipping damages shall be placed with the
carrier.
2.2 Check the heater nameplate to ensure that the heater area
classification and temperature code are suitable for the hazardous
area classification.
2.3 Verify that the nameplate voltage, phase and wattage are as
ordered and are the same as the electrical power supply available.
DO NOT CONNECT THE XGB UNIT HEATER TO A SUPPLY
VOLTAGE OTHER THAN THAT SHOWN ON THE PRODUCT
NAMEPLATE.
3.0 INSTALLATION AND MOUNTING
The heater must be installed by qualified personnel in strict
compliance with the electrical code.
3.1 DIMENSIONS
Table 1: Dimensions and Weights (See Fig. 2)
3.2 MOUNTING
3.2.1 NORSEMAN™ explosion-proof unit heaters can be mounted
to a ceiling, wall 3” pipe, or floor stand. Ensure that the mounting
surface is sufficiently strong to support the heater, which, depending
on the model, could weigh up to 185lbs, (84kg). See 3.1 for heater
dimensions and weights.
3.2.2 The heater must be positioned with a minimum 15 cm (6”) side
clearance from all surrounding surfaces and must be mounted at
least 61 cm (24”) from the floor for small cabinet units, or 2440 cm
(96”) from the floor for large cabinet units. It is best to maximize
clearances to allow freedom of rotation. Ensure that airflow into
and out of the unit is not restricted.
3.2.3 All mounting studs, bolts, nuts and other fasteners shall be
secured so that there is no possibility of loosening over prolonged
periods. Periodically inspect at regular intervals and retighten if
necessary.
3.2.4 All standard mounting kits are designed to support the heater
on its centre of gravity and to allow for 30º tilt in the vertical direction
and 360 º rotation in the horizontal. Note that horizontal rotation is
fixed after the ceiling bracket is bolted to its support.
3.2.5 For specific mounting instructions refer to the appropriate
paragraph of section 3.3.
3.2.6 If lifting with slings, take special care not to damage the casing.
3.2.7 For large cabinet units, leave the heater on the shipping skid
and use the skid as a lifting platform to facilitate installation of the
heater.
B
A B C D1 D2 Weight
lbs (kg)
Small 16-7/ 8 8-7/ 8 25-3-/ 16 17-1/2 - 100
Cabinet (429) (225) (640) (445) (45)
10-15 kW
Large 20-1/ 8 8-7/ 8 29-1/ 4 - 31-1/ 4 145 (66)
Cabinet (511) (225) (743) (794) 20-35 kW
185 (84)
Part No. 11110 - Rev. 02
2.0 PRE-INSTALLATION
2.1 Inspect the heater for possible damage due to shipping and
handling. Claims for shipping damages shall be placed with the
carrier.
2.2 Check the heater nameplate to ensure that the heater area
classication and temperature code are suitable for the hazardous
area classication.
2.3 Verify that the nameplate voltage, phase and wattage are as
ordered and are the same as the electrical power supply available.
DO NOT CONNECT THE XGB UNIT HEATER TO A SUPPLY
VOLTAGE OTHER THAN THAT SHOWN ON THE PRODUCT
NAMEPLATE.
3.0 INSTALLATION AND MOUNTING
The heater must be installed by qualied personnel in strict
compliance with the electrical code.
3.1 DIMENSIONS
Table 1: Dimensions and Weights (See Fig. 2)
A B C D D2
Weight
lbs (kg)
Small
Cabinet
Large
Cabinet
16 - 7/8
(429)
20 - 1/8 8 - 7/8 29 - 1/4 -
8 - 7/8
(225)
25 - 3/16
(640)
17-1/2
(445)
-
31 1/4
(794)
100
(45)
10-15 kW
145 (66)
20-35 kW
185 (84)
3.2 MOUNTING
3.2.1 NORSEMAN™ explosion-proof unit heaters can be mounted
to a ceiling, wall 3” pipe, or oor stand. Ensure that the mounting
surface is sufciently strong to support the heater, which, depending
on the model, could weigh up to 185lbs, (84kg). See 3.1 for heater
dimensions and weights.
3.2.2 The heater must be positioned with a minimum 15 cm (6”)
side clearance from all surrounding surfaces and must be mounted
at least 61 cm (24”) from the oor for small cabinet units, or 2440
cm (96”) from the oor for large cabinet units. It is best to maximize
clearances to allow freedom of rotation. Ensure that airow into
and out of the unit is not restricted.
3.2.3 All mounting studs, bolts, nuts and other fasteners shall be
secured so that there is no possibility of loosening over prolonged
periods. Periodically inspect at regular intervals and retighten if
necessary.
3.2.4 All standard mounting kits are designed to support the heater
on its centre of gravity and to allow for 30º tilt in the vertical direction
and 360 º rotation in the horizontal. Note that horizontal rotation is
xed after the ceiling bracket is bolted to its support.
3.2.5 For specic mounting instructions refer to the appropriate
paragraph of section 3.3.
3.2.6 If lifting with slings, take special care not to damage the
casing.
3.2.7 For large cabinet units, leave the heater on the shipping skid
and use the skid as a lifting platform to facilitate installation of the
heater.
C
A
D1
D2
AIRFLOW
Figure 2 - XGB Heater Dimensions
3.3 MOUNTING WITH STANDARD KITS
3.3.1 CEILING MOUNTING
a) Install the ceiling bracket to the mounting surface with the desired
orientation. Ensure that ‘LINE A” (Figure 3), a line drawn
perpendicular to the bolt holes in the mounting bar, is pointed in the
desired direction of airflow. The ceiling bracket must be secured to
the mounting surface using as many as six (but not less than two)
5/8” fasteners (not provided). Make certain that lockwashers are
used under all nuts or lag bolts.
b) Hoist the heater up to the ceiling bracket. Line up the large centre
hole in the swivel bracket with the large hole in the mounting bar.
c) Insert the 1/2” bolt and loosely secure with nut and washers
provided. Tilt the heater at the desired angle to the horizontal and
secure with the 3/8” bolt. Tighten the 1/2” bolt.
Figure 3 - Ceiling Mounting
3.3.2 WALL MOUNTING
a) Install the ceiling bracket to the wall bracket with the desired
orientation. Ensure that “LINE A” (Figure 4), a line drawn
perpendicular to the bolt holes in the mounting bar, is pointed in the
desired direction of air flow. Secure the wall bracket to the mounting
surface. The wall bracket must be secured to the mounting surface
using as many as six (but not less than four) 5/8” fasteners (not
provided). Make certain that lockwashers are used under all nuts or
lag bolts.
b) Follow steps b) and c) outlined in 3.3.1.
Figure 4 - Wall Mounting
LINE A
CEILING BRACKET
MOUNTING BAR
3/8” Flat Washer, Lock Washer, Nut
1/2” Flat Washer, Lock Washer, Nut
MOUNTING SURFACE
11/16” Dia. Mounting Holes
3/8” bolt
1/2” bolt
SWIVEL MOUNTING BRACKET
MOUNTING SURFACE
11/16” dia. mounting holes
5/8” flatwasher, lockwasher, nut
WALL BRACKET
LINE A
CEILING BRACKET
5/8” Bolt
MOUNTING BAR
3/8” flatwasher, lockwasher, nut
1/2” flatwasher, lockwasher, nut
3/8” Bolt
1/2” Bolt
SWIVEL MOUNTING BRACKET
5/8” Bolt
3.3 MOUNTING WITH STANDARD KITS
Part No. 11110 - Rev. 02
3.3.1 CEILING MOUNTING
a) Install the ceiling bracket to the mounting surface with the desired
orientation. Ensure that ‘LINE A” (Figure 3), a line drawn
perpendicular to the bolt holes in the mounting bar, is pointed in the
desired direction of airow. The ceiling bracket must be secured to
the mounting surface using as many as six (but not less than two)
5/8” fasteners (not provided). Make certain that lockwashers are
used under all nuts or lag bolts.
b) Hoist the heater up to the ceiling bracket. Line up the large centre
hole in the swivel bracket with the large hole in the mounting bar.
c) Insert the 1/2” bolt and loosely secure with nut and washers
provided. Tilt the heater at the desired angle to the horizontal and
secure with the 3/8” bolt. Tighten the 1/2” bolt.
3.3.2 WALL MOUNTING
a) Install the ceiling bracket to the wall bracket with the desired
orientation. Ensure that “LINE A” (Figure 4), a line drawn
perpendicular to the bolt holes in the mounting bar, is pointed in the
desired direction of air ow. Secure the wall bracket to the mounting
surface. The wall bracket must be secured to the mounting surface
using as many as six (but not less than four) 5/8” fasteners (not
provided). Make certain that lockwashers are used under all nuts
or lag bolts.
b) Follow steps b) and c) outlined in 3.3.1.
3.3.3 POST MOUNTING
a) Install the ceiling bracket to the wall bracket with the desired
orientation. Ensure that “LINE A” (Figure 5), a line drawn
perpendicular to the bolt holes in the mounting bar, is pointed in the
desired direction of air flow. Secure the wall bracket to the post using
the 1/2” U-bolts, nuts and washers supplied. Make certain the
lockwashers are used under all nuts or lag bolts.
b) Follow steps b) and c) outlined in 3.3.1.
Figure 5 - Post Mounting
3.3.4 FLOOR STAND MOUNTING
a) At times adequate support for the heater may not be available
within the structure of the space to be heated. In this situation, the
floor mount stand may be desirable. Telescoping square tubing on a
support base allows the unit to be positioned at the desired height
above the floor anywhere between 1.8 m (6’) to 3 m (10’).
b) Position the base of the stand on the floor in the desired
orientation. Ensure that “LINE A” (Figure 6), a line drawn
perpendicular to the bolt holes in the mounting bar, is pointed in the
desired direction of air flow.
c) Next, the stand is to be lagged to a solid floor to prevent the unit
from toppling. Four 11/16” diameter holes are provided in the base of
the stand for this purpose.
d) Raise the mounting frame to the desired height and secure to the
base using the hardware supplied.
e) Hoist the heater up to the mounting frame.
f) Insert the 1/2” bolt and loosely secure with nut and lockwashers
provided. Tilt the heater at the desired angle to the horizontal and
secure with the 3/8” bolt. Tighten the 1/2” bolt.
Figure 6 - Floor Mounting Stand
SWIVEL MOUNTING BRACKET
3” PIPE (NOT INCLUDED)
WALL BRACKET
LINE A
CEILING BRACKET
MOUNTING BAR
1/2” U-bolt
1/2” flat washer, lock washer, nut
5/8” flatwasher, lockwasher, nut
1/2” flat washer, lock washer, nut
3/8” flat washer, lock washer, nut
5/8” bolt
1/2” bolt
3/8” bolt
MOUNTING FRAME
MOUNTING BAR
3/8” flatwasher, lockwasher, nut
1/2” flatwasher, lockwasher, nut
3/8” Bolt
1/2” Bolt
SWIVEL MOUNTING BRACKET
5/8” Bolt
5/8” flatwasher,
lockwasher, nut
LINE A
Part No. 11110 - Rev. 02
3.3.3 POST MOUNTING
a) Install the ceiling bracket to the wall bracket with the desired
orientation. Ensure that “LINE A” (Figure 5), a line drawn
perpendicular to the bolt holes in the mounting bar, is pointed in
the desired direction of air ow. Secure the wall bracket to the post
using the 1/2” U-bolts, nuts and washers supplied. Make certain the
lockwashers are used under all nuts or lag bolts.
b) Follow steps b) and c) outlined in 3.3.1.
3.3.4 FLOOR STAND MOUNTING
a) At times adequate support for the heater may not be available
within the structure of the space to be heated. In this situation, the
oor mount stand may be desirable. Telescoping square tubing on
a support base allows the unit to be positioned at the desired height
above the oor anywhere between 1.8 m (6’) to 3 m (10’).
b) Position the base of the stand on the oor in the desired orientation.
Ensure that “LINE A” (Figure 6), a line drawn perpendicular to the
bolt holes in the mounting bar, is pointed in the desired direction of
air ow.
c) Next, the stand is to be lagged to a solid oor to prevent the unit
from toppling. Four 11/16” diameter holes are provided in the base
of the stand for this purpose.
d) Raise the mounting frame to the desired height and secure to the
base using the hardware supplied.
e) Hoist the heater up to the mounting frame.
f) Insert the 1/2” bolt and loosely secure with nut and lockwashers
provided. Tilt the heater at the desired angle to the horizontal and
secure with the 3/8” bolt. Tighten the 1/2” bolt.
Figure 9A - Small Cabinet XGB Wiring Schematic
Figure 9B - Large Cabinet XGB Wiring Schematic
3.5.8 Connect the ground wire to the ground connection located in
the supply connection housing; once again, making sure that the
wire is sufficiently long to slide back into the housing with the trolley.
See Figure 10.
Figure 10 - Supply Connection
4.0 TEMPERATURE CONTROL
4.1 BUILT-IN THERMOSTAT (OPTIONAL)
When specified, the unit comes equipped with a built-in thermostat
pre-wired to all other standard controls. Set the temperature to the
desired operating condition.
4.2 REMOTE THERMOSTAT (OPTIONAL)
Install the XT thermostat in accordance with the instruction sheet
provided. Terminals “T1” and “T2” in the heater supply housing are
provided for connection to the remote thermostat and are pre-wired
to the rest of the control circuit. Remove the jumper wire between
“T1” and “T2” and connect the thermostat to these terminals. (Refer
to Figure 9). Set the temperature to the desired operating condition.
5.0 “AUTO / OFF / FAN-ONLY” SWITCH (OPTIONAL)
If ordered, a factory installed “auto / off / fan-only” switch may be
included on the heater. The “fan-only” feature allows the heater to
cycle in a “heat” mode dictated by the controlling thermostat, even
though the fan is operating continuously.
6.0 NORMAL SEQUENCE OF OPERATION
6.1 The heater must be properly mounted and wired in accordance
with the instructions contained in this manual. The fan blade must be
free to rotate with no obstruction to air inlet or outlet areas.
6.2 Energize the heater at the rated supply voltage.
6.3 Assuming that the thermostat calls for heat, i.e. the thermostat is
set to a higher temperature that ambient:
a) The main contactor will energize the elements and the fan motor.
b) After the inlet air temperature rises to the set point of the
thermostat, the thermostat contacts will open and the main contactor
will de-energize the elements and the fan motor.
Note: The large cabinet XGB incorporates a fan delay feature in both
the “ON” and “OFF” cycles. This is a desirable feature as it allows
the heater to come to temperature before the fan operates (no cold
blasts) and to cool down the “OFF” cycle (longer life for control
components and motor). Delay “ON” is 15 - 40 seconds and delay
“OFF” is 60 -160 seconds.
6.4 The cycle described above will repeat when the ambient
temperature falls below the thermostat set point.
SIDE
LOOP
TOP
1 OR 3
Ø
SUPPLY
L3
L2
L1
C
H3
H2
H1
TO HEATING
LOAD
X1
120V T1 T2 HI-LIMITS
X2 C/AUX
C NO MOTOR
REMOVE JUMPER FOR
OPTIONAL THERMOSTAT
C
M
M
H1
H2
H3
TO HEATING
LOAD
REMOVE JUMPER FOR
OPTIONAL THERMOSTAT
120V HI-LIMITS
FD
C
FD
1
3
4
5
X2
T1
T2
3Ø ONLY
C
3Ø ONLY
X1
L3 L2 L1
L1
L2
L3
1 OR 3Ø
SUPPLY
Recommended
Catalog Number kW Voltage Max Line Amps Fuse Size
(Amps)
1 Ø 3 Ø 1 Ø 3 Ø
XGB038T3B 3. 75 208 1 9 1 1 2 5 1 5
240 1 7 1 0 2 5 1 5
480 - 6 - 1 0
600 - 5 - 1 0
XGB050T3B 5 208 2 5 1 5 3 5 2 0
240 2 2 1 3 3 0 2 0
480 - 7 - 1 0
600 - 6 - 1 0
XGB075T3A 7 .5 208 3 7 2 2 5 0 3 0
240 3 2 1 9 4 0 2 5
480 - 1 0 - 1 5
600 - 8 - 1 0
XGB100T2C 1 0 208 2 9 4 0
240 4 3 2 5 6 0 3 5
480 - 1 3 - 2 0
600 - 1 1 - 1 5
XGB100T3B 1 0 208 - 3 0 - 4 0
240 4 7 2 6 6 0 3 5
480 - 1 3 - 2 0
600 - 1 1 - 1 5
XGB150T3B 1 5 208 - 4 4 - 6 0
240 - 3 8 - 5 0
480 - 1 9 - 2 5
600 - 1 5 - 2 0
XGB200T3B 2 0 480 - 2 5 - 3 5
600 - 2 0 - 2 5
XGB225T3A 22.5 480 - 2 8 - 3 5
600 - 2 3 - 3 0
XGB250T2D 2 5 480 - 3 1 - 4 0
600 - 2 5 - 3 5
XGB300T2D 3 0 480 - 3 7 - 5 0
600 - 3 0 - 4 0
XGB325T2D 32.5 480 - 4 0 -
5 0
600 - 3 2 - 4 0
XGB350T2C 3 5 480 - 4 3 - 6 0
600 - 3 4 - 4 5
3.4 OUTLET LOUVRES
3.4.1 A louvred grill on the heater outlet end is supplied as standard.
The louver assembly may be positioned either horizontally or
vertically for maximum exibility.
3.4.2 Standard heaters are shipped with the louvers in the horizontal
position. To change the orientation of the louvers to vertical, remove
the three mounting screws securing the louver assembly to the
cabinet and rotate the louver 90º to the desired direction.
3.5 WIRING
CAUTION: Whenever hazardous materials are present, ensure
that the terminal housing covers, plugs, etc., are secured (but
not over-tightened) before powering the heater.
All circuits must be in the open position before removing
junction or terminal box covers.
3.5.1 The heater must be installed by qualied personnel in strict
compliance with the electrical code.
3.5.2 All heaters are factory pre-wired and ready for direct
connections to the power supply leads.
3.5.3 The heater must be individually fused, preferably with Class
J time-delay fuses for maximum safety. Unless stated otherwise in
your local code, fuse size shall be 125% of line current or next size
larger. See Table 2 for recommendations.
3.5.4 Use approved conduit and conduit seals are required by the
code for the hazardous location.
3.5.5 The NORSEMAN™ explosion-proof unit heaters are equipped
with a factory installed conduit seal between the control and supply
housings. In Division 2, Zone 1 and Zone 2 applications, a eld
installed conduit seal may not be required.
3.5.6 Supply wiring connections are made by accessing the over of
the side mounted supply connection housing (terminal box). Slide
the control trolley out of the housing just enough to access the
terminal block (Figure 8).
3.5.7 Connect the power leads to terminals marked L1and L2 for
single phase and L1, L2 and L3 for three phase heaters making
certain to leave some excess wire to ensure that the leads may
slide back into the housing with the trolley. See Figure 9 for control
circuit and Figure 10 for suggested wiring. Exercise care to avoid
damage to wires caused by threads on the housing.
Part No. 11110 - Rev. 02
6
5
7
6
8
Recommended Fuse
Size (Amps)
25
25
-
-
35
30
-
-
50
40
-
-
60
-
-
-
60
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
15
15
10
10
20
20
10
10
30
25
15
10
40
35
20
15
40
35
20
15
60
50
25
20
35
25
35
30
40
35
50
40
50
40
60
45
Catalog
Number
XGB038T3B
XGB050T3B
XGB075T3A
XGB100T2C
XGB100T3B
XGB150T3B
XGB200T3B
XGB225T3A
XGB250T2D
XGB300T2D
XGB325T2D
XGB350T2C
kW Voltage
3.75 208
7.5 208
10 208
10 208
15 208
20 480
22.5 480
25 480
30 480
32.5 480
35 480
240
480
600
5 208
240
480
600
240
480
600
240
480
600
240
480
600
240
480
600
600
600
600
600
60
600
Max Line Amps
1 Ø 3 Ø 1 Ø 3 Ø
19
17
-
-
25
22
-
-
37
32
-
-
43
-
-
-
47
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
11
10
15
13
22
19
10
29
25
13
11
30
26
13
11
44
38
19
15
25
20
28
23
31
25
37
30
40
32
43
34
TERMINAL BLOCK
Figure 8 - XGB Terminal Block Trolley Figure
4.0 TEMPERATURE CONTROL
4.1 BUILT-IN THERMOSTAT (OPTIONAL)
When specified, the unit comes equipped with a built-in thermostat
pre-wired to all other standard controls. Set the temperature to the
desired operating condition.
4.2 REMOTE THERMOSTAT (OPTIONAL)
Install the XT thermostat in accordance with the instruction sheet
provided. Terminals “T1” and “T2” in the heater supply housing are
provided for connection to the remote thermostat and are pre-wired
to the rest of the control circuit. Remove the jumper wire between
“T1” and “T2” and connect the thermostat to these terminals. (Refer
to Figure 9). Set the temperature to the desired operating condition.
5.0 “AUTO / OFF / FAN-ONLY” SWITCH (OPTIONAL)
If ordered, a factory installed “auto / off / fan-only” switch may be
included on the heater. The “fan-only” feature allows the heater to
cycle in a “heat” mode dictated by the controlling thermostat, even
though the fan is operating continuously.
6.0 NORMAL SEQUENCE OF OPERATION
6.1 The heater must be properly mounted and wired in accordance
with the instructions contained in this manual. The fan blade must be
free to rotate with no obstruction to air inlet or outlet areas.
6.2 Energize the heater at the rated supply voltage.
Figure 9A - Small Cabinet XGB Wiring Schematic
Figure 9B - Large Cabinet XGB Wiring Schematic
3.5.8 Connect the ground wire to the ground connection located in
the supply connection housing; once again, making sure that the
wire is sufficiently long to slide back into the housing with the trolley.
See Figure 10.
4.0 TEMPERATURE CONTROL
4.1 BUILT-IN THERMOSTAT (OPTIONAL)
When specified, the unit comes equipped with a built-in thermostat
pre-wired to all other standard controls. Set the temperature to the
desired operating condition.
4.2 REMOTE THERMOSTAT (OPTIONAL)
Install the XT thermostat in accordance with the instruction sheet
provided. Terminals “T1” and “T2” in the heater supply housing are
provided for connection to the remote thermostat and are pre-wired
to the rest of the control circuit. Remove the jumper wire between
“T1” and “T2” and connect the thermostat to these terminals. (Refer
to Figure 9). Set the temperature to the desired operating condition.
5.0 “AUTO / OFF / FAN-ONLY” SWITCH (OPTIONAL)
If ordered, a factory installed “auto / off / fan-only” switch may be
included on the heater. The “fan-only” feature allows the heater to
cycle in a “heat” mode dictated by the controlling thermostat, even
though the fan is operating continuously.
6.0 NORMAL SEQUENCE OF OPERATION
6.1 The heater must be properly mounted and wired in accordance
with the instructions contained in this manual. The fan blade must be
free to rotate with no obstruction to air inlet or outlet areas.
6.2 Energize the heater at the rated supply voltage.
6.3 Assuming that the thermostat calls for heat, i.e. the thermostat is
set to a higher temperature that ambient:
a) The main contactor will energize the elements and the fan motor.
b) After the inlet air temperature rises to the set point of the
thermostat, the thermostat contacts will open and the main contactor
will de-energize the elements and the fan motor.
Note: The large cabinet XGB incorporates a fan delay feature in both
the “ON” and “OFF” cycles. This is a desirable feature as it allows
the heater to come to temperature before the fan operates (no cold
blasts) and to cool down the “OFF” cycle (longer life for control
components and motor). Delay “ON” is 15 - 40 seconds and delay
“OFF” is 60 -160 seconds.
6.4 The cycle described above will repeat when the ambient
temperature falls below the thermostat set point.
1 OR 3
Ø
SUPPLY
L3
L2
L1
C
H3
H2
H1
TO HEATING
LOAD
X1
120V T1 T2 HI-LIMITS
X2 C/AUX
C NO MOTOR
REMOVE JUMPER FOR
OPTIONAL THERMOSTAT
C
M
M
H1
H2
H3
TO HEATING
LOAD
REMOVE JUMPER FOR
OPTIONAL THERMOSTAT
120V HI-LIMITS
FD
C
FD
1
3
4
5
X2
T1
T2
3Ø ONLY
C
3Ø ONLY
X1
L3 L2 L1
L1
L2
L3
1 OR 3
Ø
SUPPLY
Part No. 11110 - Rev. 02
L3
1 OR 3
Ø
L2
SUPPLY
L1
Figure 9A - Small Cabinet XGB Wiring Schematic
1 OR 3Ø
SUPPLY
L3 L2 L1
L3
Figure 9B - Large Cabinet XGB Wiring Schematic
3.5.8 Connect the ground wire to the ground connection located in
the supply connection housing; once again, making sure that the
wire is sufciently long to slide back into the housing with the trolley.
C
X1
120V T1 T2 HI-LIMITS
X2 C/AUX
3Ø ONLY
L1
L2
X1
120V HI-LIMITS
X2
FD
3
5
3Ø ONLY
H3
TO HEATING
H2
LOAD
H1
REMOVE JUMPER FOR
OPTIONAL THERMOSTAT
C
C NO MOTOR
C
H1
TO HEATING
H2
H3
T2
T1
1
4
M
M
LOAD
REMOVE JUMPER FOR
OPTIONAL THERMOSTAT
FD
C
See Figure 10.
TOP
LOOP
SIDE
Figure 10 - Supply Connection
3.5.9 Due to the presence of hazardous materials, ensure that the
terminal housing covers, plugs, etc., are secured (but not overtightened) before powering the heater.
4.0 TEMPERATURE CONTROL
4.1 BUILT-IN THERMOSTAT (OPTIONAL)
When specied, the unit comes equipped with a built-in thermostat
pre-wired to all other standard controls. Set the temperature to the
desired operating condition.
4.2 REMOTE THERMOSTAT (OPTIONAL)
Install the XT thermostat in accordance with the instruction sheet
provided. Terminals “T1” and “T2” in the heater supply housing are
provided for connection to the remote thermostat and are pre-wired
to the rest of the control circuit. Remove the jumper wire between
“T1” and “T2” and connect the thermostat to these terminals. (Refer
to Figure 9). Set the temperature to the desired operating condition.
5.0 “AUTO / OFF / FAN-ONLY” SWITCH (OPTIONAL)
If ordered, a factory installed “auto / off / fan-only” switch may be
included on the heater. The “fan-only” feature allows the heater to
cycle in a “heat” mode dictated by the controlling thermostat, even
though the fan is operating continuously.
6.0 NORMAL SEQUENCE OF OPERATION
6.1 The heater must be properly mounted and wired in accordance
with the instructions contained in this manual. The fan blade must
be free to rotate with no obstruction to air inlet or outlet areas.
6.2 Energize the heater at the rated supply voltage.
6.3 Assuming that the thermostat calls for heat, i.e. the thermostat
is set to a higher temperature that ambient:
a) The main contactor will energize the elements and the fan motor.
b) After the inlet air temperature rises to the set point of the
thermostat, the thermostat contacts will open and the main
contactor will de-energize the elements and the fan motor.
Note: The large cabinet XGB incorporates a fan delay feature in
both the “ON” and “OFF” cycles. This is a desirable feature as it
allows the heater to come to temperature before the fan operates
(no cold blasts) and to cool down the “OFF” cycle (longer life for
control components and motor). Delay “ON” is 15 - 40 seconds and
delay “OFF” is 60 -160 seconds.
6.4 The cycle described above will repeat when the ambient
temperature falls below the thermostat set point.
Part No. 11110 - Rev. 02
IMPORTANT:
THE PROPER MOTOR/FAN ROTATION, VIEWED FROM THE
REAR OF THE HEATER IS COUNTER CLOCKWISE FOR THE
SMALL CABINET UNITS AND CLOCKWISE FOR THE LARGE
CABINET UNITS, AS INDICATED BY THE FAN ROTATION
LABEL ON THE HEATER. INCORRECT ROTATION OF THE
FAN WILL CAUSE THE HEATER TO OVERHEAT AND CYCLE
ON THE HIGH LIMITS. CONSULT FACTORY IN CASE OF
INCORRECT ROTATION.
7.0 MAINTENANCE
7.1 The NORSEMAN™ explosion-proof unit heaters are designed
and constructed to operate in tough industrial applications with a
minimum of maintenance. However, some routine maintenance is
recommended to extend the life of the heater and its components
Always disconnect the electrical supply before performing
any maintenance.
7.2 Periodically inspect the heater installation to ensure that all
connections, ttings, plugs, screws, covers, etc. are tight and free
of corrosion.
7.3 Check the inside of the cabinet and around the element ns
for dust build-up and debris, especially after seasonal shutdowns.
Clean with an air blast or vacuum. Ensure that nothing is restricting
the air ow into the unit and that the fan blade is free to rotate.
7.4 MOTOR
The motor supplied with the small cabinet units is approved for
Class 1, Group D, Class II, Group E, F & G, T3B temperature code.
The motor supplied with the large cabinet units is approved for
Class I, Group C & D, Class II, Group E, F & G, T3B temperature
code. All motors have internal thermal protection to eliminate motor
overheating.
7.5 FAN BLADE
Visually inspect the fan blade to ensure it is free to rotate and
accidental damage has not occurred. If bent or damaged, a factory
balanced blade should be installed so that the rated airow is
maintained. A damaged fan blade may not deliver the required
airow over the elements, resulting in cycling on the high limit which
can signicantly reduce the life of the contactor and the high limit.
7.6 HEATER CABINET
Cycling of the high limits should not be permitted.
Should this occur, the unit should be inspected to determine the
cause of the cycling and the condition should be corrected.
8.0 REPLACEMENT PARTS LIST
The replacement parts list is included for reference only. Due to the
delicate nature of explosion-proof design, XGB unit heaters are not
eld serviceable. Should any problem arise, return the unit to the
factory for service by trained personnel.
SMALL CABINET UNITS:
Transformers
High Limits
Motor
Contactor
Fan Blade
208V units
240V units
480V units
600V units
T2C T-Code units
T3A T-Code units
T3B T-Code units
All units
All units
10 & 7.5kW units
5 & 3.75kW units
208V units
240V units
480V units
600V units
T2C T-Code units
T3A T-Code units
T3B T-Code units
All units
All units
10 & 7.5kW units
5 & 3.75kW units
LARGE CABINET UNITS:
Transformers
High Limits
Motors
Contactor
Fan Blade
Control Fuse
208V units
240V units
480V units
600V units
T2C T-Code units
T2D T-Code units
T3A T-Code units
T3B T-Code units
208 - 480V 3Ø units
240V 1Ø units
600V units
All units
All units
All units
EXA50-23
EXA50-25
EXA50-36
EXA50-39
C12023-11
C12023-11
C12023-10
C12023-12
1699
1979
2433
42CF35AF
10873
MDL-0.6
A CCI Thermal XTK thermostat kit may be purchased to replace a
broken thermostat. Refer to installation instructions provided with
the kit.
The XGB unit heater cabinet is stainless steel for superior corrosion
resistance. We recommend the cabinet be wiped down periodically
using a mild detergent.
7.7 OVERHEAT PROTECTION
In the event of fan failure, motor damage, excessive dust build-up
or restricted inlet airow, the heater temperature may rise, causing
the limit controls to open, breaking the power supply to the heater.
All units are equipped with two automatic reset high limit controls.
5918 Roper Road, Edmonton, Alberta, Canada T6B 3E1
F 780-468-5904
Phone: (780) 466-3178 Fax: (780) 468-5904
PLEASE ADHERE TO INSTRUCTIONS PUBLISHED IN THIS MANUAL.
Failure to do so may be dangerous and may void certain provisions of your warranty.
For further assistance, please call:
24 Hr. Hotline: 1-800-661-8529
(U.S.A. and Canada)
Please have model and serial numbers available before calling.
WARRANTY: Under normal use the Company
warrants to the purchaser that defects in material or
workmanship will be repaired or replaced
without charge for a period of 18 months from
date of shipment, or 12 months from the start date of
product was purchased for authorized repair or
replacement within the terms of this warranty.
Subject to State or Provincial law to the contrary, the
Company will not be responsible for any expense for
installation, removal from service, transportation, or
damages of any type whatsoever, including damages
arising from lack of use, business interruptions, or
incidental or consequential damages.
The Company cannot anticipate or control the
conditions of product usage and therefore
accepts no responsibility for the safe application and
suitability of its products when used alone or in
combination with other products. Tests for the safe
application and suitability of the products are the sole
responsibility of the user.
This warranty will be void if, in the judgment of the
Company, the damage, failure or defect is the result of:
• vibration, radiation, erosion, corrosion, process
contamination, abnormal process conditions,
temperature and pressures, unusual surges or
pulsation, fouling, ordinary wear and tear, lack of
maintenance, incorrectly applied utilities such as
voltage, air, gas, water, and others or any
combination of the aforementioned causes not
• any act or omission by the Purchaser, its agents,
servants or independent contractors which for
greater certainty, but not so as to limit the generality
of the foregoing, includes physical, chemical or
mechanical abuse, accident, improper
installation of the product, improper storage and
handling of the product, improper application or the
misalignment of parts.
manufacturing defects apparent within 30 days from
the date of installation.
The Company neither assumes nor
authorizes any person to assume for it any other
obligation or liability in connection with the product(s).
The Purchaser agrees that all warranty work required
after the initial commissioning of the product will be
provided only if the Company has been paid by the
Purchaser in full accordance with the terms and
conditions of the contract.
The Purchaser agrees that the Company makes
no warranty or guarantee, express, implied or
statutory, (INCLUDING ANY WARRANTY OF
MERCHANTABILITY OR WARRANTY OF FITNESS
FOR A PARTICULAR PURPOSE) written or oral, of
the Article or incidental labour, except as is expressed
or contained in the agreement herein.
LIABILITY: Technical data contained in the catalog or
on the website is subject to change without notice. The
Company reserves the right to make dimensional and
other design changes as required. The Purchaser
acknowledges the Company shall not be obligated
to modify those articles manufactured before the
formulation of the changes in design or improvements
of the products by the Company.
The Company shall not be liable to compensate or
indemnify the Purchaser, end user or any other party
against any actions, claims, liabilities, injury, loss, loss
of use, loss of business, damages, indirect or conse-
es (including legal expenses), costs, obligations and
causes of action of any kind arising wholly or partly
from negligence or omission of the user or the misuse, incorrect application, unsafe application, incorrect storage and handling, incorrect installation, lack
of maintenance, improper maintenance or improper
operation of products furnished by the Company.
Edmonton
1-800-661-8529
(780) 466-3178
Oakville
1-800-410-3131
(905) 829-4422
F 905-829-4430
Orillia
1-877-325-3473
(705) 325-3473
F 705-325-2106
Greensburg
1-800-473-2402
(812) 663-4141
F 812-663-4202
Houston
1-855-219-2101
(281) 506-2310
F 281-506-2316
Denver
1-855-244-3128
(303) 979-7339
F 303-979-7350
Loading...