Emerson NELSON CM-GP Bedienungsanleitung

NELSON™

INSTALLATION

CM-GP/AXPC100-CM-GP General Purpose Temperature ControllerINSTRUCTIONS

 TEL 800-621-1506  www.nelsonheaters.com 

14251-001 Rev. 0

Sheet 1 of 10

November 2020

ADDED FOR

AXPC100-CM-GP

The CM-GP/AXPC100-CM-GP is an electronic

temperature controller with 30-mA ground-fault protection.

It is ideal for all heat tracing applications requiring accurate

temperature monitoring. The controller can be

programmed to maintain temperatures up to 215°C

(419°F) at voltages from 100 to 277 V and can switch

current up to 30 Amperes for the CM-GP or 25 Amperes

for the AXPC100-CM-GP. The CM-GP/AXPC100-CM-GP

is complete with a temperature sensor and is housed in a

NEMA 4X rated enclosure. The controller features an

AC/DC dry alarm contact relay for monitoring critical

applications such as fire protection piping.

These instructions are to be used together with the

installation and maintenance instructions for any heating

cable or power connection kits utilized with this controller.

 Pipe Clamp – PC03, PC12 or PC20 (included)

 Fiberglass Tape – GT6 or GT60

 HC-SPA Small Pipe Adapter – For 1.0”

 RTD (Types RTD-1, RTD-7, or RTD-A)

 Large Cross Blade (Philips) Screwdriver

 Small Cross Blade (Philips) Screwdriver

 Wire Cutters

 Adjustable Wrench (52mm [2.1”] size)

 Needle Nose Pliers

 Large Slotted Screwdriver

AXPC100-CM-GP KIT CONTENTS

QTY ITEM DESCRIPTION

11LID

1 2 WIRE COVER

1 3 BOX WITH ELECTRONICS

1 4 TERMINATION PWR LONG

SILICONE

2 5 GUIDE TUBE

1 6 SEAL END

1 7 TUBE OF SILICONE

1 8 1” NPT ADAPTER

1 9 CABLE RETAINER

110STANDOFF

111LOCK NUT

1 12 3/8” SHRINK TUBE

1 13 CABLE TIE

CM-GP CONTROLLER CONTENTS

QTY ITEM DESCRIPTION

1 1 LID

1 2 WIRE COVER

1 3 BOX WITH ELECTRONICS

DESCRIPTION

OPTIONAL INSTALLATION MATERIAL RECOMMENDED TOOLS

AXPC100-CM-GP Pipe Mounted Option

CM-GP Wall Mounted Option

CM-GP Stand-Alone Option







NELSON™

INSTALLATION

CM-GP/AXPC100-CM-GP General Purpose Temperature ControllerINSTRUCTIONS

 TEL 800-621-1506  www.nelsonheaters.com 

14251-001 Rev. 0

Sheet 2 of 10

November 2020

Max Screw size: #10, 0.19in (5mm)

Counterbore size: 0.36in (9mm)

 Attach Enclosure to wall using appropriate mounting

fasteners

WALL MOUNTING THE CM-GP/AXPC100-CM-GP

CONNECTING HEATING CABLE WITH A POWER CONNECTION KIT

CONNECTING HEATING CABLE DIRECTLY TO CM-GP/AXPC100-CM-GP

Left side entry:

½” NPT (0.87in)

Bottom entry:

1” NPT (1.31in

)

Right side entry:

¾” NPT (1.10in)

 Remove the lid and wire cover.

 Bring the power cable from the heater

into the controller, and terminate the two

power cables each into one of the

terminals marked Output.

Terminate the ground wire or braid into

the ground terminal.

 This kit is designed for use with all

wattages of CLT-J, CLT-JT, LT-J, LT-

JT, HLT-J and XLT-J heater cables.

 To directly connect MI cable you must

use a 1 to ¾” reducing bushing with

roundin

hub.

 Remove the lid and wire cover.

 Terminate the heating cable power wires

in the power connection kit as per the

instructions that come with the kit

 Run the two power output wires of the

power connection kit into the “OUTPUT”

terminals in the controller.

 Connect the ground hub of the power

connection kit to the ground terminal in

the Controller.

 Incoming power should be connected

likewise into the Input terminals

NELSON™

INSTALLATION

CM-GP/AXPC100-CM-GP General Purpose Temperature ControllerINSTRUCTIONS

 TEL 800-621-1506  www.nelsonheaters.com 

14251-001 Rev. 0

Sheet 3 of 10

November 2020

1 ½” (38 mm)

 Pull excess heating cable

back through standoff.



Allow 1 ½” (3.81 cm) of heating cable

to remain above top of standoff body.

 Carefully slide enclosure adapter over

cable terminations.

 Screw enclosure adapter into standoff

until fully seated at positive stop.

 Mount standoff securely to pipe.

 Insert supplied cable tie through slot

provided to prevent possible rotation

of enclosure.

Note: For pipes 1” (25mm)

and below, install HC_SPA

(purchased separately)

between standoff and pipe.

HC-SPA adapter

for small pipes.

STEP 3 STEP 4

AXPC100-CM-GP STANDOFF INSTALLATION

Enclosure

Adapter

Cable Tie

STEP 2

STEP 1

NELSON™

INSTALLATION

CM-GP/AXPC100-CM-GP General Purpose Temperature ControllerINSTRUCTIONS

 TEL 800-621-1506  www.nelsonheaters.com 

14251-001 Rev. 0

Sheet 4 of 10

November 2020



Install flex conduit and drain as shown.

 Terminate power and ground wires to terminal

block.

 Install enclosure cover.

Flex Conduit

Conduit Drain



Install thermal insulation and protective

lagging.

 Apply sealant around standoff penetration to

prevent moisture entry.

 Leave installation instructions with end user

for future maintenance and/or trouble

shooting.

 Fill in the blank fields on the label located on

the cover of the junction box as follows:

CIR. NO. – Electrical circuit heating cable

connected to.

CAT. NO. – Type of heating cable used

VOLTS – Operating voltage of heating cable

– Max 277VAC

AMPS – Operating current of heating cable –

Max 30A

STEP 8

 Install enclosure and secure to enclosure

adapter with supplied locknut.

 Do not over tighten locknut

 Enclosure may be rotated in 90° increments

to match installation requirements.

STEP 7

WARNING

 Potential High Temperature –

Ensure proper selection of

power cable

 Heating cable installations require incoming

power wiring to be rated for 105ºC operation.

 Maximum steady-state current may not

exceed 18 amps, 25 amps for XLT cable.

 Verify that all connections are properly

installed and secure.

STEP 5 STEP 6

NELSON™

INSTALLATION

CM-GP/AXPC100-CM-GP General Purpose Temperature ControllerINSTRUCTIONS

 TEL 800-621-1506  www.nelsonheaters.com 

14251-001 Rev. 0

Sheet 5 of 10

November 2020

Condition N/O N/C

Power Off OPEN CLOSED

Power On CLOSED OPEN

Alarm OPEN CLOSED

CONNECTING INCOMING POWER

CONNECTING TEMPERATURE SENSOR

CONNECTING ALARM WIRING

 Install conduit, fittings, and wires according

to local standards.

 Wire size limits: 18 AWG – 6 AWG

(See installation and maintenance instructions

for self-regulating heater cable for further detail

(GA-1765)).

 In order to minimize loosening due to pipe

vibration, use flexible conduit

 Pull in power and ground wires, strip off

½”(13mm) of insulation and terminate as

shown.

 This unit can be used with any 100Ω,

platinum, 3-wire RTDs

 Adjust the length of the temperature sensor

to meet the application needs Strip the 1/3 ”

(9mm) insulation and either connect an red

ferrule (18AWG) or tin the end.

 Insert the wires into the terminal block on

the plate above as shown.

 Wire size must be within AWG 18-24

 The controller has a dry form C contact

Max.2A 20-277VAC, 12-48VDC

 Connect the alarm wires as shown to either

the NO and C terminals (for normally open)

or NC and C terminals (for normally closed)

NELSON™

INSTALLATION

CM-GP/AXPC100-CM-GP General Purpose Temperature ControllerINSTRUCTIONS

 TEL 800-621-1506  www.nelsonheaters.com 

14251-001 Rev. 0

Sheet 6 of 10

November 2020

 Install wire cover by attaching it to the plastic standoffs, and ensuring that it snaps in place.

 Program the Controller, see MENU SETTINGS section for details.

 Attach the lid with the included screws

 Leave these instructions with the end user for future reference.

FINISHING INSTALLATION

WIRING VERIFICATION

NELSON™

INSTALLATION

CM-GP/AXPC100-CM-GP General Purpose Temperature ControllerINSTRUCTIONS

 TEL 800-621-1506  www.nelsonheaters.com 

14251-001 Rev. 0

Sheet 7 of 10

November 2020

The following chart:

 Shows how the items will appear on the Controller

 Lists the parameters in order of appearance on the Controller.

 Lists the default, min. and max values for each parameter.

Menu Items Paramete

Default Min Max

Units

(°C or °F) Celsius - -

Maintain

Setpoint

4°C

(40°F)

0°C

(32°F)

218°C

(425°F)

Deadband 3°C

(5°F)

1°C

(2°F)

6°C

(10°F)

High Alarm

Setpoint Off

Setpoint +

deadband +

3°C

(

5°F

)

223°C

(433°F)

Low Alarm

Setpoint Off -9°C

(16°F)

Setpoint -

deadband –

3°C

(

5°F

)

The controller contains 3 LED lights which are viewable through the enclosure window

These lights are as follows:

CM-GP/AXPC100-CM-GP LEDs

MENU SETTINGS

Programing the Controller:

 To enter Settings mode, Press the “MENU” button for 3 seconds and the display will flash “Unit” for

1 second and then C or F depending on current settings.

 To change the setting press “UP” or “DOWN” to reach the desired value.

 To save and move to the next setting press “NEXT”

 Pressing “NEXT” on “Lo ALr” saves and returns to normal mode.

 To save and return to normal mode at any point ot the menu; hold “MENU” for 3 seconds until the

actual temperature is displa

ed.

 ACTUAL (Amber):

Indicates the status of the Actual

Temperature as detected by the RTD.

Blinking: The Actual temperature is below

setpoint and the heater is energized.

Solid: The Actual temperature is at or above

the set point, the heater is de-energized.

 SETPOINT (Amber):

Indicates that value on the display is the

setpoint temperature value

 ALARM (Red):

Blinks when an Alarm condition is present.

For alarm details see section

“CM-GP/AXPC100-CM-GP Error Displa

s”.

NELSON™

INSTALLATION

CM-GP/AXPC100-CM-GP General Purpose Temperature ControllerINSTRUCTIONS

 TEL 800-621-1506  www.nelsonheaters.com 

14251-001 Rev. 0

Sheet 8 of 10

November 2020

To Initiate Ground Fault Testing:

GROUND FAULT TESTING

ERROR DISPLAYS

The Controller will display the following upon

detecting an error state:

 Low Temerature Alarm

When Actual temperature(AT) is less

than or equal to the low temperature

alarm value (LTAV), Alarm LED (Red)

will start flashing and the display will

flash as follows: “Lo”, “ALr”,”LtSp”,

LTAV,”Act”, AT

 High Temerature Alarm

When AT is greater than or equal to the

high temperature alarm value (HTAV)

Alarm LED (Red) will start flashing and

the display will flash as follows: “HI”,

“ALr”, “HtSp”, HTAV, “Act”, AT

 Temperature Sensor Alarm

When the RTD is shorted or open, the Alarm LED (Red) will start flashing and the display will start

flashing “Err”, “SnSr” alternatively.

 Ground Fault Trip

When ground fault current is greater than 30mA the Alarm LED will start flashing, and the display

will start flashing “GF”, “triP” alternatively, and the output relay will be deactivated until the fault is

cleared and the GF is reset.

 Press “NEXT” button for 3 seconds

 The Output relay will be energized (if not already) and

artificial leakage current of 40 mA will be induced

 The Output relay should be deenergized and the display

should flash “GF”, “triP” alternating and the Alarm should be

activated.

 If the Output relay does not trip, “FAIL” will flash on the

display and the Output relay will be forced off.

 To reset the Controller, press and hold the “DOWN” button

for 3 seconds.

NELSON™

INSTALLATION

CM-GP/AXPC100-CM-GP General Purpose Temperature ControllerINSTRUCTIONS

 TEL 800-621-1506  www.nelsonheaters.com 

14251-001 Rev. 0

Sheet 9 of 10

November 2020

 To prevent electrical arcing and fire hazard, all cable connections and electrical wiring connections should be

sealed against moisture. This includes the use of proper cable sealing kits and the moisture proofing of all

wire connections.

 The metal sheath/braid of the heating cable must be connected to a suitable ground path before electrical

power is connected to this equipment.

 Isolate electrical power supply before opening or removing the Wire Cover.

 The enclosure cover must be secured with all screws provided to maintain the environmental ratings.

 The main components used in this connection system may present a hazard from static electricity. Only

surface cleaning with a damp cloth is acceptable.

 Routine maintenance is required to maintain compliance with health and safety legislation:

 Check that the cover gasket is in place and not damaged each time the enclosure is closed.

 Check that all cover screws are in place and secure each time the enclosure is closed.

 Check the security of all cable entries on a routine basis.

 Check that all electrical connections are tight and secure on a routine basis.

 Check for physical damage and replace as required.

 This connection system is designed for use in areas subject to normal industrial levels of vibration. They are

not designed for use in areas subject to intentional or extreme conditions of vibration.

GENERAL CONDITIONS OF SAFE USE

NEC®; NFPA 70: National Electrical Code®, International Electrical Code Series

CLASS - C481382 - TEMPERATURE-INDICATING AND REGULATING EQUIPMENT

Other than Appliance Type - Certified to US Standards

CLASS - C481302 - TEMPERATURE-INDICATING AND REGULATING EQUIPMENT

Other Than Appliance Type

CSA LR 021208

Nelson Heat Tracing Systems products are supplied with a limited warranty. Complete Terms and Conditions may be found on Nelson's

website at www.nelsonheaters.com. Nelson is a trademark of the Appleton Group LLC (Heating Cable Systems), 2 Connecticut South Dr,

East Granby, CT, 06026. A division of Emerson Automation Solutions.

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