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D.
THERMOSTAT INSTALLATION
1.
Factory Installed - For shipping purposes the
thermostat well (located at back of unit) has not been
installed.
Position thermostat bulb perpendicular to housing
being careful not to kink the capillary. Slide well over
bulb and screw into place. Make sure that a minimum
5 threads engagement is achieved.
2.
Field Installed Kit - Most Norseman™ XB units
are suitable for field installation of a thermostat kit
with the operator shaft hole on the front side of the
unit and plugged with a socket head cap screw. If a
E.
WIRING
1.
Whenever hazardous materials are present, ensure
that the terminal housing covers are secure before
powering the heater.
2.
Use supply wires suitable for 221°F (105°C) or 302°F
(150°C) for high ambient XB models.
3.
Use approved conduit and conduit seals as required
by the code for hazardous locations.
4.
To provide maximum protection each Norseman™ XB
heater should be fused individually using the nearest
standard fuse size which is not less than 120% of the
expected line current.
5.
All heaters come factory prewired and ready for direct
connection to the power supply leads.
5.1
Connect the power leads to terminals marked L1
and L2 for single phase and L1, L2 & L3 for three
phase heaters as shown in Figure 9, page 7.
5.2
Connect the ground wire to the ground
connection located in the heater terminal
housing.
Figure 9 – Wiring Diagram
thermostat is to be field installed, check to verify that
you have been supplied with the correct thermostat
kit. Single phase heaters use a single pole thermostat
as supplied in kit number XTKW04481. Three phase
heaters use a double pole thermostat as supplied
in kit number XTKW04483. Follow the instructions
supplied with the kit.
NOTE: For high ambient heaters - (Single phase units only)
Single phase heaters use a single pole thermostat as
supplied in kit number XTKW07481.
WARNING. Whenever hazardous materials are
present, ensure that the terminal housing covers,
plug, etc., are secured (but not over-tightened)
WARNING
before energizing the heater.
CAUTION. All circuits must be in the open position
before removing junction or terminal box covers.
CAUTION
CAUTION. Use supply wires suitable for 221ºF
(105ºC) or 302°F (150°C) for high ambient XB
models. Supply wires are to be fused with
CAUTION
appropriately sized HRC fusing.
CAUTION. Ensure that no power is connected to
the equipment prior to making any connections.
CAUTION
7
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