©201
7
Nelson Heat Tracing Systems
www.nelsonheaters.com
GA2497 Rev.
5
6
Installation and Initial Set up
CM-2201/CM-2202
3.1
Installation
The
CM-2201/CM-2202
must
be
installed
only
in
areas
for
which it has been approved and in accordance with all
applicable electrical codes and ordinances. All conduit entry
holes must be appropriately installed and sealed to maintain
ingress protection
rating.
Do not install this unit prior to functional testing if shipping
container or internal packaging shows signs of damage.
Notify
the
appropriate individuals immediately if damage is
suspected.
3.2
Selecting Installation Location
The CM-2201/CM-2202 should be installed in an area
protected from the elements as much as possible. It is
possible to install the unit in unprotected areas but such
often limits maintenance/access. Further, installation in
unprotected areas must be carefully considered to ensure it
is always in operating conditions consistent with
specifications. See Appendix A
for additional details.
3.3
Mounting
The CM-2201/CM-2202 should be mounted at a convenient
height to
suit
operator
interaction. Conduit entries should
be made in the bottom of the enclosure to prevent damage to
the internal electronics from moisture
intrusion. Conduit
entries should be drilled and the use of suitable bushings is
required to maintain the environmental ratings.
3.4
Wiring
Electrical wiring diagrams and schematics are provided in
Appendix
B and C of this manual. Ensure that all wiring
and connections are in accordance with applicable wiring
codes. Enclosure grounding must be in accordance with
applicable wiring codes
for non-metallic devices.
The
power
supply
for the CM-2201 is derived
from the
power provided for the load. However, the power supply
for the CM-2202 can be
provided independent of the
power supply
for
the loads
being
controlled. For
example, the power supply for the CM-2202 can be 120
VAC while the loads being controlled can be 277 VAC.
Further, the power supply for the CM-2202 may
also
be
derived
from
either of the loads being controlled – this is
implemented by connecting appropriate jumpers.
Refer
to Wiring
Diagram
in
Appendix
B
for details.
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