General Information; Description; Application; Construction And Installation - Norseman XGB Series Installation, Operation & Maintenance Instructions Manual

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GENERAL INFORMATION

A.1 Description
The small cabinet units are available with ratings from 3.75 to
10 kW, and can be identified by their internally mounted motor.
The large cabinet units are available from 10 kW up to 35 kW. See
C.1 Dimensions, page 5 for cabinet dimensions.
A.2 Application
Designed specifically for heating industrial spaces where
potentially
explosive substances are or may be present. Typical hazardous
location environments include:
Water and Sewage Treatment Plants
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Oil Refineries
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Compressor Stations
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Pulp and Paper Mills
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Paint Storage Booths
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Cement Plants
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Mines
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A.3 Construction and Installation
Norseman™ unit heaters use extra heavy wall finned tubular
steel heating elements to provide safe, efficient heat transfer to
the environment. The heater does not contain glycol.
In structures with high ceilings, other units may not have the
range of motion needed to direct air flow to the floor. 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 airflow redirection
provided by the outlet louver. For lateral airflow, the entire louver
assembly can be rotated 90º.
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 field installed conduit seal may not be
required.
To facilitate installation, the Norseman™ XGB explosion-proof
unit heaters feature the patented x-Max
terminal block trolley for connection of the electrical supply.
A.4 Standard Pro duct Features
See Figure 1 and Figure 2, page 4.
CSA C/US Certified for hazardous locations. Small cabinet
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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.
Zone marking available.
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ࢦ Ratings from 3.75 to 35 kW.
208 to 600V, 1 or 3 phase
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Low watt density extra heavy wall tubular steel finned
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heating elements with nickel plated finish
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A.5 Optional Features
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A.6 Thermostats
Thermon 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 field-convertible to tamper-proof. Thermostats for
remote mounting can also be provided on request.
A.7 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.
housing with slide out
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A.8 Accesories
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 floor stand. Each mounting configuration
provides maximum flexibility for outlet flow direction. The swivel
bracket (standard on all heaters) features holes for affixing a
safety chain.
Glycol-free design allows the heater to be tilted 30º downward
Rotatable outlet louvers provide 35º of additional airflow
redirection
Patented x-Max housing with track and trolley system
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simplifies 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
Built-in, externally adjustable thermostat
Built-in disconnect
Moisture-resistant construction
"AUTO/OFF/FAN-ONLY" switch
Pilot light
Manual reset high limit
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