nvent Raychem RTD4AL Installation Instructions Manual

WARNING:

RTD4AL

3 in (76 mm)

2 in (51 mm)

4.25 in

(108 mm)

3/4-in NPT

(19 mm)

conduit

opening

RTD Temperature Sensor for Temperature Measurement up to
900°F (482°C) Installation Instructions

DESCRIPTION

The nVent RAYCHEM RTD4AL is a three-wire platinum RTD
(resistance temperature detector) typically used with monitoring
and control systems that require accurate temperature control.
The RTD4AL kit can be used with a wide variety of RAYCHEM
monitoring and control systems.

These instructions detail the installation of the RTD4AL in
conjunction with existing RAYCHEM component kits.

TOOLS REQUIRED

• 3.5 mm flat-blade screwdriver

ADDITIONAL MATERIALS REQUIRED

• Pipe straps

• Conduit with 16–22 AWG shielded instrument cable or
equivalent armored cable

APPROVALS

The RTD4AL is CSA Certified for use in North America by the
manufacturer for use in Division 2 hazardous locations as follows:

Class I, Division 2, Groups A, B, C, D
Class II, Division 2, Groups F, G

This component is an electrical device. It must be installed correctly
to ensure proper operation and to prevent shock or fire. Read
these important warnings and carefully follow all the installation

KIT CONTENTS

Qty Description

1 RTD Temperature Sensor

SPECIFICATIONS

Sensor housing Aluminum; Type 4X
Sensor sheath 316 stainless steel
Range –100°F to 900°F (–73°C to 482°C) max
Accuracy ±1°F (0.5°C) at 32°F (0°C)
Resistance 100 ohms at 0°C α =0.00385 ohms/ohm/°C
Connection 3/4 in. NPT conduit hub

instructions. Component approvals and performance are based on
the use of specified parts only. Do not use substitute parts or vinyl
electrical tape to make connections.

WIRING INFORMATION

The length of RTD extension wires is determined by the wire

gaugeused.

To reduce the likelihood that electrical noise will affect temperature
measurement, keep RTD extension wires as short as possible.

Use shielded instrument cable such as nVent RAYCHEM
MONI-RTD-WIRE (22AWG, PVC insulation, –30°F to 140°F,
–20°C to 60°C) or Belden 83553 (22 AWG, FEP insulation,
–95°F to 395°F, –70°C to 200°C).

RTD DIRECT CONNECTION

Maximum RTD extension wire length

AWG Feet (meters)

16 4500 (1400)
18 2800 (880)
20 1800 (550)
22 1100 (340)

Place strap under heating cable

INSTALLATION WITH HEATING CABLE ELECTRICAL WIRING GUIDELINES:

Electrical Wiring Notes:

Most electrical codes (such as NEC Article 725) permit Class 1
circuits to occupy the same cable, enclosure, or raceway without
regard to whether the individual circuits are alternating current

JBS-100-A

or direct current, providing all conductors are insulated for the
maximum voltage of any conductors in the cable, enclosure or
raceway.

Additional Materials Required

• JBS-100-A or other power connection kit

• Pipe straps

RTD4AL WIRING

Connect the wires as shown.
1 Note: Ground RTD extension wire shield at one

end only, preferably at RAYCHEM electronics end.
2 Note: RTD housing must be properly grounded

using the screw provided.

Electrical schematic of RTD

Field Wiring

White

White (Common return)

Red

Red (Source)

Red

Red (Compensate)

Conduit
drain

Conduit
drain

Pipe strap

Splice box
(provided by others)

Sensor

North America

Tel [phone]
Fax [phone]
[e-mail]

©2018 nVent. All nVent marks and logos are owned or licensed by nVent Services GmbH or its aliates. All other trademarks are the property of their respective owners.
nVent reserves the right to change specications without notice.

Raychem-IM-H56918-RTD4AL-EN-1805 PN 858160-000

Europe, Middle East, Africa

Tel [phone]
Fax [phone]
[e-mail]

Asia Pacific

Tel [phone]
Fax [phone]
[e-mail]

Latin America

Tel [phone]
Fax [phone]
[e-mail]

nVent.com