Thermostat Installation; Wiring - Norseman XB Series Installation, Operation & Maintenance Instructions Manual

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
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 thermostat is to be field
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
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
NOTE: For high ambient heaters - Single phase heaters use
XB units are suitable
™
WARNING
XB
™
CAUTION
CAUTION
CAUTION
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.
a single pole thermostat as supplied in kit number
XTKW07481. Three phase heaters use a double pole
thermostat as supplied in kit number XTKW07483.
WARNING. Whenever hazardous materials are present,
ensure that the terminal housing covers, plug, etc., are
secured (but not over-tightened) before energizing
the heater.
CAUTION. All circuits must be in the open position
before removing junction or terminal box covers.
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 appropriately sized HRC
fusing.
CAUTION. Ensure that no power is connected to the
equipment prior to making any connections.
7