nvent 910 Series Assembly instructions

910 Series Heat Trace Controller
Installation, Operating and Maintenance Instructions
Firmware versions up to V3.1x

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Contents
Certication........................................................................................................................................ 4
Limited Warranty................................................................................................................................ 4
Warranty Exclusion/Disclaimer......................................................................................................... 4
Exclusive Remedies........................................................................................................................... 4
Conducted and Radiated Emissions—FCC/DOC Statement of Compliance ................................. 4
Section 1—Overview.................................................................................................................................. 5
1.1 Introduction.................................................................................................................................. 5
1.2 Controllers Covered by this Manual ........................................................................................... 5
1.3 Product Overview......................................................................................................................... 5
1.4 Modular Components.................................................................................................................. 6
1.5 Controller Assemblies................................................................................................................. 7
1.6 Ordering and Conguration Guide .............................................................................................. 7
Section 2—Installation and Wiring............................................................................................................. 9
2.1 Introduction.................................................................................................................................. 9
2.2 Initial Inspection .......................................................................................................................... 9
2.3 Operator Safety Considerations.................................................................................................. 9
2.4 Operating Environment................................................................................................................ 9
2.5 Installation Location.................................................................................................................... 9
2.6 Mounting Procedures................................................................................................................ 10
2.7 Wiring ......................................................................................................................................... 10
2.8 Initial Power-up .......................................................................................................................... 13
2.9 Setup for the 910 ....................................................................................................................... 13
Section 3—Operator Console and Operation ........................................................................................... 14
3.1 Alphanumeric Display................................................................................................................ 14
3.2 Keypad........................................................................................................................................ 14
3.3 LED Indicators............................................................................................................................ 15
3.4 Operational Basics..................................................................................................................... 15
Section 4—Operator Console Modes....................................................................................................... 18
4.1 Alarm Mode................................................................................................................................ 18
4.2 Monitor Mode ............................................................................................................................ 19
4.3 Congure Mode ......................................................................................................................... 20
Section 5—Conguration Parameter Details ........................................................................................... 26
5.1 Introduction................................................................................................................................ 26
5.2 Point Setup Parameters ............................................................................................................ 26
5.3 Miscellaneous Setup Parameters............................................................................................. 33
5.4 Temperature Sensor Alarms Conguration ............................................................................. 34
5.5 Other Alarms Conguration ...................................................................................................... 37
5.6 Communications Setup............................................................................................................. 44
5.7 Operator Console Functions ..................................................................................................... 46
Section 6—Monitored Parameter Details ................................................................................................ 48
6.1 Introduction................................................................................................................................ 48
6.2 Analog Readings........................................................................................................................ 48
6.3 Maintenance Data ..................................................................................................................... 49
Section 7—Control Modes....................................................................................................................... 51
7.1 Introduction................................................................................................................................ 51
7.2 Switch Control Modes............................................................................................................... 51
7.3 Load Shedding Control Mode ................................................................................................... 53
Section 8—Troubleshooting .................................................................................................................... 54
8.1 Operator Checks ........................................................................................................................ 54
8.2 Common Problem Areas........................................................................................................... 54

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8.3 Common Alarms—What to Look for......................................................................................... 56
Section 9—Maintenance .......................................................................................................... 60
9.1 Operator Maintenance............................................................................................................... 60
9.2 Replaceable Parts...................................................................................................................... 60
Appendix A—Specications .................................................................................................................... 61
Appendix B—Typical Enclosure Dimensions ........................................................................................... 62
B.1 Standard Fiberglass EMR Assembly #10170-001................................................................... 62
B.2 Optional Stainless Steel EMR Assembly #10170-003 ............................................................ 63
B.3 Standard Fiberglass SSR Assembly #10170-0002 ................................................................. 64
B.4 Optional Stainless Steel SSR Assembly #10170-004 ............................................................. 65
B.5 910 Series HTC Control Module Dimensions .......................................................................... 66
Appendix C—Wiring Diagrams................................................................................................................. 67
C.1 TS Wiring.................................................................................................................................... 67
C.2 Power Wiring ............................................................................................................................. 67
C.4 Alarm Output Wiring.................................................................................................................. 68
C.5 External Input/Output Port Wiring............................................................................................ 70
Appendix D—HTC Load Shedding Sequence........................................................................................... 71
Appendix E—100 Ω Platinum RTD Table.................................................................................................. 72
DIN 43760—100 Ω Platinum Resistance Temperature (RTD)—0.00385 Ohms/Ohm/°C............. 72
Appendix F—100 Ω Nickel-Iron RTD Table............................................................................................... 73
Appendix G—Factory Default Conguration V3.1X.................................................................................. 74
910 Series HTC ................................................................................................................................ 74

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NVENT RAYCHEM 910 SERIES HEAT TRACE CONTROLLER
Installation and Maintenance Instructions for Firmware Versions up to and Including V3.1X
Notice: The information contained in this document is subject to change without notice.
CERTIFICATION
nVent certifies that this product met its published specifications at the time of shipment from
the Factory.
LIMITED WARRANTY
This nVent product is warranted against defects in material and workmanship for a period of
18 months from the date of installation or 24 months from the date of purchase, whichever
occurs first. During the warranty period, nVent will, at its option, either repair or replace
products that prove to be defective.
For warranty service or repair, this product must be returned to a service facility designated by
nVent. The Buyer shall prepay shipping charges to nVent and nVent shall pay shipping charges
to return the product to the Buyer. However, the Buyer shall pay all shipping charges, duties,
and taxes for products returned to nVent from another country.
nVent warrants that the software and firmware designated by nVent for use with the RAYCHEM
910 Controller will execute its programming instructions properly. nVent does not warrant that
the operation of the hardware, or software, or firmware will be uninterrupted or error-free.
WARRANTY EXCLUSION/DISCLAIMER
The foregoing warranty shall not apply to defects resulting from improper or inadequate
maintenance by the Buyer, Buyer-supplied software or interfacing, unauthorized modification
or misuse, operation outside of the specifications for the product, or improper installation.
No other warranty is expressed or implied. nVent disclaims the implied warranties of
merchantability and fitness for a particular purpose.
EXCLUSIVE REMEDIES
The remedies provided herein are the buyer’s sole and exclusive remedies. nVent shall not be
liable for any direct, indirect, special, incidental, or consequential damages, whether based on
contract, tort, or any other legal theory.
CONDUCTED AND RADIATED EMISSIONS—FCC/DOC STATEMENT OF COMPLIANCE
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reason- able
protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio frequency energy and,
if not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is
likely to cause harmful interference, in which case the user will be required to correct the
interference at his own expense.
This equipment does not exceed Class A limits for radio emissions as set out in Schedule V
to VIII of the Radio Interference Regulations of Communication Canada.
Cet apparel respecte les limites de bruits radioelectriques applicables aux appareils numeriques
de Classe A prescrites dans la norme sur le materiel brouilleur: “Appareils Numeriques,”
NMB-003 edictee par le Ministre des Communications.
IMPORTANT WARNINGS AND NOTES
The following icons are used extensively throughout this manual to alert you to important
warnings that affect safety and to important notes that affect the proper operation of
the unit.
Be sure to read and follow them carefully.

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SECTION 1—OVERVIEW
1.1 INTRODUCTION
This manual provides information pertaining to the installation, operation, testing, adjustment,
and maintenance of the nVent RAYCHEM Model 910 Series Heat Tracing Controller.
Additional copies of this user manual may be ordered separately through your nVent
representative or online at nVent.com using the document number H56873.
1.2 CONTROLLERS COVERED BY THIS MANUAL
This document covers the 910 Series Heat Trace Controllers and its available options. The
information coincides with the specific releases of firmware for the 910 product which are
listed on the front page. As nVent releases new firmware to modify or enhance the product
significantly, new documentation will accompany these releases. To ensure that you are using
the correct documentation for your particular version of controller, please check the firmware
version number of the 910 against the version number listed on the front of this manual. This
may be displayed using the Operator Console or a communicating device. As subsequent
changes are made, supplements to this document will be issued and included in manuals
shipped after the firmware is released. Supplements will make specific reference to the
operational or functional changes, and are available at nVent.com.
1.3 PRODUCT OVERVIEW
1.3.1 DESCRIPTION
The 910 Series electronic Heat Tracing Controller controls, monitors, and communicates
alarms and data for one heating circuit. The ability to install the units in Class 1, Division 2
areas supports direct field installation, if desired. It is available with a solid-state relay (SSR)
output for use in hazardous areas or with electromechanical relay (EMR) output for use in
ordinary (non-hazardous) areas.
1.3.2 FEATURES
A detailed description of available features may be found in Section V of this manual.
Highlights of specific features follow.
Keypad and Alphanumeric Display
A six character alphanumeric LED display provides the operator with large easy to read mes-
sages and prompts, eliminating complex and cryptic programming. Six individual keys are
provided to quickly access alarming and operational information.
–40°F to 140°F (–40°C to 60°C) Operation
Extended temperature operation permits installation in all but the harshest environments.
Single or Dual Temperature Sensor Inputs
The ability to utilize one or two temperature sensor (TS) inputs allows the selection of one of
eight control modes and programming of all temperature parameters.
High and Low Temperature Alarms
High and low temperature alarms are offered for both temperature sensor inputs of each control
point.
High and Low Current Alarms
The 910 offers full adjustment of both the high and low alarm points over the entire current
measurement range.
Solid State or Electromechanical Relay (EMR) Output
The 910 is available with either a solid-state relay (SSR) or an electromechanical relay (EMR)
output switch. With the SSR option, the user may select a time-proportional control algorithm,
a simple deadband control mode, or one of two ambient control algorithms. The EMR version
always uses either the deadband mode or the proportional ambient contactor mode. Switching
device failure alarms are supported for both types of output devices.

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Ground Fault Alarm and Trip
Ground Fault (GF) current levels are monitored and may be displayed in milliamps.
The availability of the actual ground fault level gives the user the choice of both alarm and trip
levels suitable for the particular installation.
Overcurrent Protection
A unique overcurrent protection algorithm greatly reduces the possibility of damage to the
circuit or the controller in the event of a temporary overload while allowing for initially high
in-rush currents (SSR options only).
Soft Starting
Given the circuit breaker size, the 910 will limit the energy let-through to help prevent nuisance
breaker trips due to cable in-rush. This feature makes the controller particularly attractive for
use with self-regulating cables (SSR options only).
Minimum/Maximum Temperature Tracking
The controller maintains the minimum and maximum temperature values it has measured
since the last reset of these values. This is helpful in determining causes of temperature
alarms.
Latching/Non-Latching Temperature Alarms
User selectable non-latching temperature alarms allow the controller to automatically clear the
alarm when the condition no longer exists.
High and Low Voltage Alarms
Operating at voltages less than design can cause serious loss of heater output. The alarming
of preset voltage deviations ensures availability of sufficient wattage output.
Power-Limiting
The 910 will control the maximum output wattage if the full load power exceeds the specified
Maximum Power Setpoint. This feature eliminates the need for low voltage transformers in
many applications and can assist in standardization of heating cable types (SSR options only).
Autocycling
The controller will momentarily energize the circuit (for 10 seconds) at a programmable
interval. Circuit alarms will be generated at the time of autocycle instead of when the heat is
required. This feature eliminates the need for a preventive maintenance program as these tests
are performed at regular intervals by the controller.
Temperature Sensor Failure Alarm
Both open and shorted sensors are detected and alarmed by the controller.
Random Start
A startup delay between 0 and 9 seconds ensures that all units do not come on line at the
same time.
Full Digital Communications
An optional internal communications interface allows the communication of alarms
and analog data to a monitoring system. Industry-standard RS-232 or RS-485 serial
communications are available for applications requiring direct interfacing to other devices.
The modem version maintains compatibility with legacy products, including the Group
Communications Controller (Model 780/GCC-9000). With heat trace data at the user’s
fingertips, historical trending of temperatures, power consumption, or other parameters are
available for analysis and system optimization.
CSA C/US
The 910 Series of controllers are approved for Class I, Division 2, Groups A, B, C, D hazardous
locations making them ideal for direct installation in the field. This may save the significant
expense of wiring back to a centrally located electrical distribution center.
1.4 MODULAR COMPONENTS
The 910 Series controller is made up of two components. Each component’s primary function
is described below.
1.4.1 CONTROL MODULE
The 910 Control Module forms the heart of a single heat trace control solution. Each Control
Module provides all of the intelligence required to control and monitor one heat trace circuit.

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It includes indicators for alarm and output status and an integral Operator Console. An internal
connector is provided to plug in an optional communications interface.
The Control Module packaging provides a rugged, vibration-proof design.
Temperature sensor, communications, and alarm control wiring are connected to the
lever-operated spring terminals, providing gas-tight, vibration-resistant connections.
A large, easy-to-read alphanumeric display and menu-driven interface eases controller
con- figuration and eliminates the need for an external programmer. Access is available for
all monitored parameters, programmed values, and alarm information. Enhanced security is
provided by password protection.
Single phase current monitoring, ground fault detection, and voltage monitoring are provided.
The nVent RAYCHEM 910 Control Module also incorporates a universal power supply, allowing
operation directly from 100 to 277 Vac.
1.4.2 COMMUNICATIONS INTERFACE
In applications where the user wishes remote configuration capability, or wants to
communicate trace information and/or alarms to another device such as a Group
Communications Controller (780 Series/GCC-9000), an optional communications interface
may be installed in the Control Module.
A modem version that maintains compatibility with legacy products is available, or other
industry-standard interfaces such as nVent RAYCHEM RS-232 and RS-485 may be specified.
1.5 CONTROLLER ASSEMBLIES
Two standard assemblies are available and stocked at the Factory:
1. An SSR version for use in ordinary or Class I, Division 2 areas
2. An EMR version for use in ordinary locations only
1.6 ORDERING AND CONFIGURATION GUIDE
NVENT RAYCHEM 910 CONTROLLERS – FACTORY INVENTORY
Description Catalog Number Part Number Weight
RAYCHEM 910 controller in an 8” x 10” FRP enclosure with
window. 2-pole 30 A EMR. Controls a single circuit with a
2-pole electromechanical relay.
(Approved for ordinary areas only)
910*E1FWL*EMR2 10170-001 15
RAYCHEM 910 controller in an 8” x 10” FRP enclosure with
window. 2-pole 30 A EMR. Controls a single circuit with a
2-pole electromechanical relay.
Includes an isolated 2-wire RS-485 communication option.
(Approved for ordinary areas only)
910*E1FWL*EMR2*485 10170-015 15
RAYCHEM 910 controller in an 8” x 10” FRP enclosure with
window. 2-pole 30 A 277 V SSR. Controls a single circuit with
a 2-pole solid-state relay.
(Approved for Class I, Div. 2 areas)
910*E1FWL*SSR2 10170-002 20
RAYCHEM 910 controller in an 8” x 10” FRP enclosure with
window. 2-pole 30 A 277 V SSR. Controls a single circuit with
a 2-pole solid-state relay. Includes an isolated 2-wire RS-485
communication option. (Approved for Class I, Div. 2 areas)
910*E1FWL*SSR2*485 10170-016 20
nVent RAYCHEM Supervisor Software RAYCHEM Supervisor 10391-002 1
RAYCHEM 910 CONTROLLERS – MADE-TO-ORDER (Contact factory for lead time)

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RAYCHEM 910 controller in an 8” x 10” stainless-steel
enclosure with window. 2-pole 30 A EMR. Controls a single
circuit with a 2-pole electromechanical relay.
(Approved for ordinary areas only)
910*E1SW*EMR2 10170-003 20
RAYCHEM 910 controller in an 8” x 10” stainless-steel
enclosure with window. 2-pole 30 A EMR. Controls a single
circuit with a 2-pole electromechanical relay. Includes an
isolated 2-wire RS-485 communication option.
(Approved for ordinary areas only)
910*E1SW*EMR2*485 10170-017 20
RAYCHEM 910 controller in an 8” x 10” stainless-steel
enclosure with window. 2-pole 30 A 277 V SSR. Controls a
single circuit with a 2-pole solid-state relay.
(Approved for Class I, Div. 2 areas)
910*E1SW*SSR2 10170-004 25
RAYCHEM 910 controller in an 8” x 10” stainless-steel
enclosure with window. 2-pole 30 A 277 V SSR. Controls a
single circuit with a 2-pole electromechanical relay. Includes
an isolated 2-wire RS-485 communication option.
(Approved for Class I, Div. 2 areas)
910*E1SW*SSR2*485 10170-018 25
RTD SENSORS
100-ohm platinum RTD with 10’ stainless-steel corrugated
sheath
RTD10CS RTD10CS 1.0
RTD, ambient, cable style MONI-RTD-200 254741 0.1
C1D1 RTD, –100°F to 900°F, pipe mounted RTD7AL RTD7AL 2.0
RTD, –100°F to 900°F, pipe mounted RTD4AL RTD4AL 1.2
OPTIONS
Append the following code(s) to the end of the standard Model Code to have the option
included at the factory
Option Code Description
*232
*MDM
RS-232 communications option (replace *485 with *232)
Modem communications option (replace *485 with *MDM)
*ALR
*ALG
Red LED pilot light
Green LED pilot light
Contact your local representative for configurations not listed here.

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SECTION 2—INSTALLATION AND WIRING
Caution: Be sure all personnel involved in installation, servicing, and programming are qualified
and familiar with electrical equipment, their ratings and proper practices and codes. Multiple
voltages and signal levels may be present during the installation, operation, and servicing of
this product. Do not power the product until the safety provisions outlined in this section have
been observed.
2.1 INTRODUCTION
This section includes information regarding the initial inspection, preparation for use, and
storage instructions for the 910 Series Heat Trace Controller.
2.2 INITIAL INSPECTION
Inspect the shipping container for damage. If the shipping container or cushioning material
is damaged, it should be kept until the contents of the shipment have been verified for com-
pleteness and the equipment has been checked mechanically and electrically. Procedures
for configuring and operating the heat trace controller are given in Sections III, IV, and V. If
the shipment is incomplete, there is mechanical damage, a defect, or the controller does not
pass the electrical performance tests, notify the nearest nVent representative. If the shipping
container is damaged, or the cushioning material shows signs of stress, notify the carrier as
well as your nVent representative. Keep the shipping materials for the carrier’s inspection.
2.3 OPERATOR SAFETY CONSIDERATIONS
The standard 910 controller using solid-state relays is suitable for Class 1, Division 2, Groups
A, B, C, and D hazardous areas. Hazardous areas are defined by Article 500 of the National
Electrical Code and Section 18 of the Canadian Electrical Code. Electromechanical relay (EMR)
based assemblies are suitable for use in ordinary (non-hazardous) areas only.
Caution: Some wiring configurations will use more than one power source and all must be
de-energized prior to performing any maintenance on a controller circuit.
2.4 OPERATING ENVIRONMENT
The operating environment should be within the limitations specified in the 910 Heat Trace
Controller Specifications outlined in Appendix A.
2.5 INSTALLATION LOCATION
The wide ambient operating temperature range of the controller permits installation in most
any convenient location. Considerations should include expected atmospheric conditions,
accessibility for maintenance and testing, the location of existing conduits and hazardous area
rating. Ambient temperature conditions may affect load current ratings.
Caution: Always be sure that the intended location is classified as an area that the product is
approved for as defined by Article 500 of the National Electrical Code and/or Part I, Section 18
of the Canadian Electrical Code.
2.6 MOUNTING PROCEDURES
Mounting hole dimensions for the standard enclosures are shown in Appendix B. Conduit
entries should be made in the bottom of the enclosure if possible to reduce the possibility
of water entry or leakage. Conduit entries must be drilled/punched following the enclosure
manufacturers’ recommendations. Use bushings suitable for the enclosure type and install
such that the completed installation remains waterproof. For nonmetallic enclosures,
grounding hubs and conductors must be installed in accordance with Article 501-4(b)
of the National Electrical Code and Part I of the Canadian Electrical Code.

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The user may want to consider enclosure drain holes in applications where moisture is a
problem; drill 0.125” holes in the bottom of the enclosure on both the left and right sides.
Two holes reduce the possibility that one will plug and ensures drainage if the enclosure is not
perfectly level. Note that drilling holes in the enclosure compromises the NEMA 4 rating.
2.6.1 Controller Installation and Removal
CAUTION:
Always ensure that the power to the unit is turned off during installation or removal to avoid
the risk of injury and damage to the controllers.
WARNING:
Explosion Hazard! Do not install or remove the control module while the unit is powered.
Communications status indicators
D910-010
D910 SERIES
Alarm status indicator
AC alarm output
L1/Line in
L2/Neutral in
L1/Line out to tracer
L2/Neutral out to tracer
Output status indicator
HTCBus communications address
Communications inter
face
type label (optional)
RTD,
communications, inhibit/override
input, alarm dry contact output
Fig. 2.1 Control module face
2.7 WIRING
Wiring diagrams for typical configurations are included in Appendix C of this manual.
CAUTION:
Always verify wiring connections before applying power to the controller or connected circuits.
To avoid injury or equipment damage, do not install or remove wiring while controller power is
on. To minimize the chance of loose connections, the 910 uses lever-operated, spring-loaded
terminals for signal wiring. See Appendix A for allowable wire sizes and recommended
insu- lation strip lengths.
2.7.1 TEMPERATURE SENSOR CONNECTIONS
Use shielded, twisted, three-conductor wire for the extension of RTD leads. The wire size
should ensure that the maximum allowable lead resistance is not exceeded. Shields on RTD
wiring should be grounded at the controller end only, using the terminals provided.
Temperature Sensors Terminal No.
Shield 19
TS 1 Source (WHT) 20