Emerson Nelson CM-1, Manual

Page: 13 / 24

www.nelsonheaters.com
GA-2129 Rev. 11
Sheet 13 of 22
Jul. 2018
CM-1 AMBIENT PANEL START-UP PROCEDURES
1. Always use caution when energizing heater cables, especially when the ambient temperature is above
50°F.
Note: Start-up requires that the cables be energized. One way to accomplish this is to set the panel
thermostat to a temperature above the current ambient air temperature until start-up is completed.
2.
Make sure the heat tracing circuit breakers are in the on position and allow the heater cables to be
energized for 30 minutes.
3. Check the CM-1 alarm display on the front of the CM-1 panel for any alarms. If any alarms are indicated
use the alarm trouble-shooting guide included with these instructions to resolve each alarm one by one.
Note: Current alarms can sometimes be resolved by adjusting the current sensing trimpot located on the
sensor card using the “Current Adjustment Procedure” section in the CM-1 manual. Press the <Alarm
Reset> button on the CM-1 panel to verify all alarms.
4. If an alarm is still present after troubleshooting the circuit, check the CM-1 Program switch configuration
using the CM-1 manual. The program switch configuration allows the CM-1 to monitor both self-
regulating and series resistance heater cables.
Note: Each circuit must be configured according to the type of cable being used. Use the CM-1 manual to
check for the correct programming switch configuration for each circuit.
5. Using the current trimpot adjustment procedure from the CM-1 manual adjust the current trimpot for each
circuit.
6. Reset the ambient thermostat to the correct maintain temperature.
7. Heater cable testing and trouble-shooting guides are available to assist in resolving alarms.