Taco Electronic Solutions iWorx TRP Series User manual

© 2011 Taco Electronic Solutions, Inc. 1
Installation Guide 502-019
TRP Series Sensors
SUPERSEDES: October 22, 2010 EFFECTIVE: October 17, 2011
Plant ID: 001-3963
Table of Contents
TRP Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Applicable Documentation . . . . . . . . . . . . . . . . . . . . 2
Installation Instructions. . . . . . . . . . . . . . . . . . . . . . . . . 3
Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Static Electricity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Before Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
About this Document . . . . . . . . . . . . . . . . . . . . . . . . 3
Inspecting the Equipment . . . . . . . . . . . . . . . . . . . . 3
What is Not Included with this Equipment . . . . . . . . 3
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Mounting the Device. . . . . . . . . . . . . . . . . . . . . . . . .4
Wiring Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

iWorx® TRP Series Sensor
2 502-019, Effective: October 17, 2011
© 2011 Taco Electronic Solutions, Inc.
TRP SENSOR
The iWorx® TRP Series are thermistor type 10K Ohms (Type III) sensors. They provide temperature input information
to a controller such as the ZXU or BLMC.
The thermistor’s higher resistance creates a larger signal with the same measuring current, negating most lead wire
resistance problems and eliminating the need for signal conditioners.
Overview
The TRP Series offers a stainless steel bullet probe which is 1/4” in diameter and 1” long. It is available in two varia-
tions of lead length:
The TRP Series can measure the boiler supply and return water temperature or the outdoor temperature (provided it is
mounted in a weatherproof enclosure) or the temperature atop a concrete slab and provide this information to the con-
trollers.
Features
• Directly connects to selected iWorx® controllers via low-cost, shielded, twisted-pair cable.
• Stainless steel probe.
• Output: 10K Ohm @ 77º F.
Applicable Documentation
Model Total Length
TRP1 24 inches
TRP2 11 feet
Description Audience Purpose
iWorx® TRP Series Sensors
Installation Guide, Document No.
502-019 (this document)
– Application Engineers
– Wholesalers
– Contractors
Provides specific installation information about the sensors,
including mounting, wiring, and operating information.
iWorx® Sensor Compatibility, Doc-
ument No. 509-001
– Application Engineers
– Wholesalers
– Contractors
Shows operational compatibility among the various iWorx®
sensors and controllers.
iWorx® LCI2 Application Guides,
Document No. 505-002
– Application Engineers
– Installers
– Service Personnel
– Start-up Technicians
– End user
Provides instructions for setting up and using the iWorx®
Local Control Interface (LCI).
http://iWorxWizard.taco-hvac.com – Application Engineers
– Wholesalers
– Contractors
An on-line configuration and submittal package generator
based on user input. Automatically generates bill of materi-
als, sequence of operations, flow diagrams, wiring diagrams,
points and specifications.

iWorx® TRP Series Sensor
502-019, Effective: October 17, 2011 3
© 2011 Taco Electronic Solutions, Inc.
INSTALLATION INSTRUCTIONS
PRECAUTIONS
General
This symbol is intended to alert the user to the presence of important installation and maintenance (servic-
ing) instructions in the literature accompanying the equipment.
WARNING: Electrical shock hazard. Disconnect ALL power sources when installing or servicing this
equipment to prevent electrical shock or equipment damage.
Make all wiring connections in accordance with these instructions and in accordance with pertinent national and local
electrical codes.
Static Electricity
Static charges produce voltages that can damage the equipment to which this sensor is being connected. Follow these
static electricity precautions when handing this equipment.
• Work in a static free area.
• Touch a known, securely grounded object to discharge any charge you may have accumulated.
• Use a wrist strap when handling printed circuit boards. The strap must be secured to earth ground.
Location
Avoid locations where corrosive fumes, excessive moisture, vibration or explosive vapors are present.
Avoid electrical noise interference. Do not install near large contactors, electrical machinery, or welding equipment.
Mount out of direct sunlight and away from sources of heat and cold other than the space you wish to measure.
BEFORE INSTALLING
About this Document
The instructions in this manual are for the TRP series sensors, which provide temperature-sensing capabilities to an
iWorx® system.
Inspecting the Equipment
Inspect the shipping carton for damage. If damaged, notify the carrier immediately. Inspect the equipment for damage.
Return damaged equipment to the supplier.
What is Not Included with this Equipment
• Job wiring diagrams
• Tools:
– Drill and bits for mounting screws
– Level
– Static protection wrist strap
• Mounting screws
• Accessories

iWorx® TRP Series Sensor
4 502-019, Effective: October 17, 2011
© 2011 Taco Electronic Solutions, Inc.
INSTALLATION
Warning: Electrical shock hazard. To prevent electrical shock or equipment damage, disconnect ALL
power sources to controllers and loads before installing or servicing this equipment or modifying any wir-
ing.
Thermistors are resistive elements, and therefore, are NOT polarity sensitive. It is recommended that wir-
ing for these units not be run in the same conduit as line voltage wiring or with wiring used to supply highly
inductive loads such as motors, generators, and coils.
Mounting the Device
When mounting on a pipe, the unit should be mounted on the bottom side of the pipe to ensure proper heat transfer
and an accurate temperature reading. Heat transfer compound and proper insulation will help the overall accuracy of
the sensor.
WIRING INFORMATION
The following electrical connection can be made to the iWorx® TRP series sensors:
• Wiring to the temperature inputs of iWorX controllers
CAUTION: Do not connect any power wiring to the sensor. Failure to observe this precaution will damage
the sensor.
Wiring
Wiring includes a connection between an iWorx® controller and an iWorx® TRP Series sensor.
Wiring requires at least 18 gauge (0.205 mm2), shielded twisted-pair wire.
Note:
• Wiring is polarity insensitive.
• Shielded cable is required.
• Wiring can be in the same conduit with UI, AO, and DI Wiring.
• If the cable is installed in areas of high RIF/EMI, the cable must be in conduit.
Connecting the iWorx® TRP Series Sensor
Requires 2-wire connection to the controller. To connect the thermistor outputs, attach the wires from the sensor to suit-
able terminals of the controller, as shown in Figure 1.
Figure 1: Wiring Connections.
Wiring Checkout
Verify wiring between TRP sensor and the iWorx® Controller is installed according to job wiring diagram, national and
local wiring codes.

iWorx® TRP Series Sensor
502-019, Effective: October 17, 2011 5
© 2011 Taco Electronic Solutions, Inc.
SPECIFICATIONS
Sensor
Temperature Sensor (TRP Series)
• Type: Precision thermistor 10K @ 77°F (25°C), Type III
• Accuracy: ±0.36 °F (0.2 °C)
• Range: -30 to 230°F (-34.4 to 110 °C)
• Humidity: 0 to 90% RH, non-condensing
General
Enclosure
• Stainless steel (304 or 312)
• Dimensions: Probe 1” long x 0.25” dia (25.4 mm x 6.4 mm)
Weight and Wires
Wire Length
• 500 feet max. (152.4 meters) between sensor and controller
TROUBLESHOOTING
This section provides useful tips on troubleshooting the iWorx® TRP Series Sensors.
Table 1: Troubleshooting Tips
Getting Help
Components within iWorx® TRP Series Sensors cannot be field repaired. If there is a problem with a sensor, follow the
steps below before contacting your local TES representative or TES technical service.
1.Make sure sensors are connected and communicating to desired devices.
2.Record precise hardware setup indicating the following:
Version numbers of applications software.
Controller firmware version number.
A complete description of difficulties encountered.
Sensor Wire Length
(Apx.) Wire Type Sensor Weight Ship Weight
TRP1 22.35-23 in (568-
584 mm)
22 AWG 7/30 white, stranded etched
teflon rated to 392 °F (200 °C)
0.2 ounces
(0.006 kilograms)
0.4 pounds
(0.181 kilograms)
TRP2 130.5-131 in
(3.31-3.32 m)
CLP2 2 conductor shielded plenum
rated temp range -40 to 200°F (-40 to
148.8°C)
0.12 pounds
(0.054 kilograms)
0.5 pounds
(0.227 kilograms)
Problem Solution
Sensor reads 0 ohms Sensor or wires are shorted together.
Sensor reads infinity Sensor or wires are open.
Erratic readings Bad wire connection or condensation on board.