Danfoss Connecto NA Connection Kits
Installation Instruction
1 Overview
Danfoss Connecto NA is a family of connection kits for self-regulating heating cables (trace heaters). The Connecto NA connection kits are simple and safe to use, yet faster to install and more cost effective than conventional systems. They can be used with Danfoss PX/RX heating cables in fixed equipment heating systems for multiple applications (e.g., heating of pipes, roof and gutter de-icing etc.).
Image Description: The image shows the components of a Connecto NA connection kit: a black outer sleeve, a white/cream inner sleeve, a small beige connector piece, and a black connector with wires.
2 Certifications / Approvals
Connecto NA connection for self-regulating heating cable for roof and gutter de-icing, pipe applications etc.; for use with Danfoss PX/RX heating cable only.
[CSA logo]
3 Technical Data
| Parameter | Value |
|---|---|
| Operating voltage | max. 250 VAC |
| Current | max. 16 A |
| Ambient temperature range | -40 °F to 185 °F / -40 °C to 85 °C |
| Operation temperature range | -40 °F to 150 °F / -40 °C to 65 °C |
| Protection class | NEMA Type 4X / IP66 |
The following terms describe the parts of the heating cable within these instructions:
- bus wire
- heating matrix
- insulation jacket
- grounding braid
- outer jacket
Diagram Description: A cross-section of a heating cable is shown, illustrating its layers: an orange outer jacket, a grey insulation jacket, a black heating matrix, a silver grounding braid, and the internal bus wire.
4 Safety
For safe installation and operation of the Connecto NA, the technical requirements and instructions given in this manual must be followed.
⚠️ WARNING: Risk of fire or electrical shock. Follow these guidelines to avoid personal injury or material damage.
- All electrical systems and installations must comply with Danfoss requirements and be installed in accordance with the relevant electrical codes and any other applicable national and local codes.
- The US and Canadian electrical codes require ground fault protection to be provided for all trace heating circuits.
- Install the connection kit and heating cables carefully.
- The bending radius of the heating cable must be at least 1" (25 mm). Do not bend on the narrow axis.
- Use the heating cables and connection kit in accordance with the intended purpose and strictly comply with the operational data specified in section Technical Data.
- For roof and gutter applications, use only the UV-resistant Danfoss RX-C 'black' heating cable (certified by the –WS mark on the device).
- Any defective component in a set must be replaced before installation.
- Keep all components and the heating cables dry before and during installation.
- To avoid short circuits, do not connect the heating cable bus wires together.
- When used for roof and gutter de-icing, the Connecto NA connection kit must be installed in a dry place outside the gutter.
- For end seal installation, silicone adhesive is used. Follow the safety instructions given on the packaging.
- Keep these instructions for future reference. If applicable, leave them with the end user.
- De-energize before installation or servicing.
- Use only original Danfoss accessories.
The document also contains safety warnings in French (Section 10: Sécurité et avertissements), covering similar risks. The notice on page 17 states that instructions are provided in English only and refers to ix.danfoss.com for the French version.
5 Kit Contents
The following table lists the kit contents for each of the Connecto NA connection systems:
| Kit Type | Components |
|---|---|
| Connecto NA-B-PK Power connection with end seal | 1x Black outer sleeve, 1x Beige end cap, 1x White inner sleeve, 1x Black connector with wires, 1x Small beige connector piece |
| Connecto NA-B-P Power connection | 1x Black outer sleeve, 1x White inner sleeve, 1x Black connector with wires, 1x Small beige connector piece, 1x Beige end cap |
| Connecto NA-B-S Splice connection kit | 2x Black outer sleeves, 2x White inner sleeves, 2x Black connectors with wires, 2x Small beige connector pieces, 1x Beige end cap |
| Connecto NA-B-PS Powered splice kit | 2x Black outer sleeves, 2x White inner sleeves, 2x Black connectors with wires, 2x Small beige connector pieces, 1x Beige end cap |
| Connecto NA-B-T T-Connection kit | 1x Black outer sleeve, 3x White inner sleeves, 3x Black connectors with wires, 3x Small beige connector pieces, 3x Beige end caps |
| Connecto NA-B-PT Powered T-Connection kit | 1x Black outer sleeve, 3x White inner sleeves, 3x Black connectors with wires, 3x Small beige connector pieces, 3x Beige end caps |
| Connecto NA-B-X X-Connection kit | 1x Black outer sleeve, 4x White inner sleeves, 4x Black connectors with wires, 4x Small beige connector pieces, 4x Beige end caps |
| Connecto NA-B-E Silicone end seal (5X) | 1x Tube of silicone adhesive, 5x Beige end caps |
6 Component Identification
| Component | Description | Assembly Type | Assembly Description |
|---|---|---|---|
| Threaded Cap | A threaded plastic cap. | Powered splice assembly | A pre-assembled connection with wires. |
| End cap | A smooth plastic cap. | T-Assembly | A T-shaped connection assembly. |
| Sleeve | A ribbed plastic sleeve. | Powered T-Assembly | A powered T-shaped connection assembly. |
| Silicone adhesive | A tube of silicone adhesive. | X-Assembly | An X-shaped connection assembly. |
| Clamping sleeve | A black sleeve with internal blades. | Splice assembly | A pre-assembled connection with wires. |
| Clamping sheet | A metal sheet with perforations. | Power connection assembly | A pre-assembled power connection. |
7 Installation
Required Tools / Equipment
The following tools and equipment are required for installation of the Connecto NA connection kits:
- Wire cutters
- Utility knife
- Tape measure
Cautions and Warnings
⚠️ WARNING: Risk of fire or electrical shock. De-energize all power circuits before installation or servicing. Always use ground fault equipment within the heat tracing system.
- Double-check that all power circuits are de-energized before you begin your work.
- Make sure that you do not exceed the maximum heating circuit length for the heating cable type you use. Refer to the design guide of the heating system.
Preparation of the Heating Cable
⚠️ WARNING: Risk of short cuts and/or material damage. Keep the heating cable ends dry before and during installation. Observe the heating cable's installation instructions.
- Unroll the required heating cable in a straight line and cut to the correct length. Cut off the heating cable ensuring a straight cut.
Diagram Description: Shows cutting the heating cable straight with a knife.
- Slide on the threaded cap and the clamping sleeve.
Diagram Description: Shows sliding a threaded cap and a clamping sleeve onto the cable.
- Remove 1 5/8" (42 mm) of the outer jacket from the end of the heating cable.
Diagram Description: Shows removing the outer jacket with a knife, indicating a length of 1 5/8" (42 mm).
- Slide the clamping sheet over the grounding braid right up to the outer jacket.
- Draw the grounding braid back over the clamping sheet.
Diagram Description: Shows sliding a clamping sheet over the grounding braid, then folding the grounding braid back over the clamping sheet.
- Make sure that the clamping sleeve's orientation is correct in order that the blades fit into the designated slots. Insert the heating cable into the sleeve until the heating cable is flush with the sleeve.
Diagram Description: Shows inserting the cable into a clamping sleeve, highlighting correct orientation of blades. Close-ups show blades fitting into slots (✔️) and not fitting (❌).
Connection of the Heating Cable
- Make sure that the tip of the assembly and the groove of the clamping sleeve are properly aligned. Push the clamping sleeve against the sleeve and insert into the assembly.
Diagram Description: Shows aligning the tip of the assembly with the clamping sleeve groove, then pushing the sleeve into the assembly.
- Completely screw together the threaded cap and the assembly.
Diagram Description: Shows screwing together the threaded cap and the assembly.
⚠️ WARNING: Risk of fire or malfunction. Double-check that there is no gap left between the threaded cap and the assembly.
Connecting Various Kit Types
If applicable, repeat steps 3 to 8 to connect all remaining heating cables:
Splice kit:
Diagram Description: Shows a splice connection being made.
Powered splice kit:
Diagram Description: Shows a powered splice connection being made.
T-Connection kit:
Diagram Description: Shows a T-connection being made.
Powered T-Connection kit:
Diagram Description: Shows a powered T-connection being made.
X-Connection kit:
Diagram Description: Shows an X-connection being made.
Installation of the End Seal
- Cut the trace heater off straight.
- Remove 3/4" (20 mm) of the outer jacket.
Diagram Description: Shows cutting the trace heater end straight and removing 3/4" (20 mm) of the outer jacket.
- Remove the exposed grounding braid. Make sure that the insulation jacket is not damaged.
Diagram Description: Shows removing the grounding braid, ensuring the insulation jacket is not damaged.
- Cut in a triangle (1/4" / 5 mm) between the bus wires.
Diagram Description: Shows cutting a triangle shape (1/4" / 5 mm) between the bus wires.
- Put silicone adhesive onto the exposed insulating jacket and into the end cap.
Diagram Description: Shows applying silicone adhesive to the exposed insulation jacket and into the end cap.
- Push the end cap over the end of the trace heater.
Diagram Description: Shows pushing the end cap over the trace heater end.
NOTICE: Allow the adhesive to cure for 20 minutes, then visually inspect. Full strength is reached after 24 hours.
8 Attachment to Pipes
Attachment Methods
NOTICE: It is recommended to install the Danfoss Connecto NA connection kit on a mounting bracket ("off-pipe") to protect it from excessive temperatures (as shown on the left). However, when used in moderate temperature conditions, all Danfoss Connecto NA connection kits can also be directly attached to the pipe (as shown in 1B).
Off-pipe Installation (1A)
- Attach the mounting bracket (see section Accessories on page 10) to the pipe using cable ties.
- Attach the Danfoss Connecto NA connection kit to the mounting bracket and the trace heater to the pipe using polyester tape or cable ties.
- Make sure that the distance between 2 attachment points does not exceed 12" (300 mm) on plastic pipes or 36" (900 mm) on steel pipes.
Diagram Description: Shows a mounting bracket attached to a pipe with cable ties, and the Connecto NA kit attached to the bracket.
On-pipe Installation (1B)
- Attach the trace heater and the Danfoss Connecto NA connection kit to the pipe using polyester tape or cable ties.
- Make sure that the distance between 2 attachment points does not exceed 12" (300 mm) on plastic pipes or 36" (900 mm) on steel pipes.
Diagram Description: Shows the Connecto NA kit and heating cable attached directly to a pipe using polyester tape or cable ties, with maximum spacing indicated.
Position on the Pipe
Depending on the Danfoss Connecto NA kit you use, the position on the pipe is as follows (note that all Danfoss Connecto NA connection kits can be installed on a mounting bracket ("off-pipe") or directly on the pipe):
Power connection:
Diagram Description: Shows the positioning of a Power connection kit on a pipe.
Splice:
Diagram Description: Shows the positioning of a Splice kit on a pipe.
Powered splice:
Diagram Description: Shows the positioning of a Powered splice kit on a pipe.
T-Connection:
Diagram Description: Shows the positioning of a T-Connection kit on a pipe.
Powered T-Connection:
Diagram Description: Shows the positioning of a Powered T-Connection kit on a pipe.
X-Connection:
Diagram Description: Shows the positioning of an X-Connection kit on a pipe.
