Installation and Initial Set up CM-2201
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©2015 Nelson Heat Tracing Systems
www.nelsonheaters.com GA2497 Rev. 2
4.0 Initial Set-Up
Upon initial power-up, the CM-2201 display will run self-
check, display the software version, then the main program
will start.
4.1 Display Modes
This feature determines what messages and functions are
displayed during normal operations. If set to “normal user,”
only basic information is displayed. If set to “advanced
user,” all controller information is displayed. Each
parameter shown in this manual will list the Display
Mode required to view information and access each function
during programming.
4.2 Password Protection
The CM-2201 can have password protection enabled to
ensure that sensitive operating parameters are not
inadvertently adjusted. If password protection is enabled,
the user will be prompted to enter a valid value to access
any protected features. The user may also replace the de-
fault password value with their own unique value for greater
protection of operational parameters. The password can be
disabled indefinitely if no protection is desired.
4.3 Security Levels
CM-2201 has two levels of security; the high level (Ad-
vanced Display) uses password protection. Disabling the
password from the Password Enable / Disable menu will
keep the password disabled indefinitely – any parameter
can be changed without the use of a password. At this level,
all the functions and monitoring parameters are open. The
low level (Normal Display) does not give access to param-
eter settings, but is open for monitoring a few parameters,
such as temperature, current, GFI, etc.
If the password is “Enabled”, by going to the parameter to
be changed, after the ‘up’ or ‘down’ arrow is pressed, the
controller will ask to type the password, and after that, the
parameter can be changed and saved. The
password will stay disabled for 15 min, then be auto-
matically re-enabled. During the 15 min period when the
password is disabled, other parameters can be changed
and saved.
3.0 Installation
The CM-2201 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.
3.1 Selecting Installation Location
The CM-2201 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.
3.2 Mounting
The CM-2201 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.
3.3 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.
