Fenwal THD-7052 Installation and operation manual

Electronic Heat Detectors
Models THD-7052 & THD-7053
70.03
Effective: January 2006
FEATURES
Approvals/Listing
US and Canadian UL Listed (cULus)
FM Approved
CSFM Approved
NYC MEAAccepted (pending)
Thermistor based Heat Detection
Nominal Sensitivity
THD-7052: 135oF (57oC) Fixed Temperature w/
15oF (8.3oC) per minute Rate-Of-Rise
THD-7053: 135oF (57oC) Fixed Temperature
Wide Range of Input Voltage 10.2 to 36.8 VDC
Low Current design
Dual Response LEDs allow 360-degree viewing
Trouble Indication
Low Profile Appearance using Surface Mount Technology
Electrically and Mechanically Compatible with all Fenwal
Smoke and Electronic Heat Detectors and Bases
Interchangeable 2-Wire and 4-Wire Bases
Universal Relay Modules
Non Polarized
Locking Feature for Vandal Resistance
EMI and RFI Resistant
DESCRIPTION
The Fenwal Models THD-7052 and THD-7053 are thermistor-
based electronic Heat Detectors with a 135oF (57oC) Fixed
Temperature set point. In addition, the Model THD-7052 has a
Rate-Of-Riseoftemperature detection featureratedat 15oF (8.3oC)
perminute.Both detectors haveadvanced solid-state,low-voltage,
surface-mount circuitry and are designed for 2-Wire and 4-Wire
installation using the appropriate Detector base. The detectors
are designed for Open Area Protection (UL 521) and may be
installedinsystemsintendedfor Releasing DeviceService through
use of a compatible Fire Alarm Control Panel
Two Red Light Emitting Diodes are located diametrically opposite
each other so as to allow 360-degree viewing. Both LEDs
continuouslyindicatetheoperatingconditionofthe Detector.During
standby, the LEDs flash once every six seconds. During alarm,
both LEDs light steady at full brilliance. A double flash every six
seconds indicates a detector with a thermistor trouble.An optional
base is available to provide remote LED function. A unique gated
outputcircuit designprovides improved stabilityand transient sup-
pression.Specialsignal processingtechniques verify thepresence
of smoke before the detector will alarm.
The detector head is installed into the base with a simple twist-
lock action. A locking feature is provided for vandal resistant se-
curity. Detector base options are available to. provide for auxiliary
test, indication and/or control functions
Optional bases are available for supplementary 2-wire or 4-wire
relay functions. The Model THD-705x Heat Detectors may be in-
terchanged with other Fenwal Series CPD-705X Ionization and
Series PSD-715X Photoelectric Smoke Detectors when using
multifunction base configuration.
TECHNICAL SPECIFICATIONS
Table 2 lists the Technical Specifications for Models THD-7052
and THD-7053 Heat Detectors.
CONTROL UNITS
The Models THD-7052 and THD-7053 Detectors are designed
for operation with control units and releasing devices having spe-
cific voltage and current characteristics that are compatible with
the detector circuitry. The Detectors are compatible with the
Fenwal control units and interface modules listed in Table 1.
Please refer Fenwal Document 70.63 for UL Compatibility List-
ings with Fire Alarm Panels manufactured by others.
DETECTOR BASE OPTIONS
The Models THD-7052 and THD-7053 Detectors can be used
with the detector base options and accessories in Tables 3 and
4. Various base options are available to provide auxiliary relay
and/or remote indication and remote test feature.
SPACING (OPEN AREA LOCATION)
For UL/ULC applications, the Model THD-7052 and THD-7053
Detectors are listed to be installed on 70 foot (21.3 m) centers,
typically on smooth ceilings up to 15 feet (4.6 m) high and will
operate with minimum air circulation. Resultant maximum 4,900
square foot (455.2 m2) spacing may be used as a reasonable
guide for comparable applications.
For FM applications, the listed spacing is 35 feet (10.7 m) cen-
ters. Where special conditions exist (ceiling obstructions, etc.),
reduced spacing must be used to achieve adequate protection.
For additional information, consult the FenwalAutomatic Fire De-
tection Application Engineering Manual MC-402, NFPA-72 and
the local Authority Having Jurisdiction.

2
WIRING DIAGRAMS
For detailed wiring diagrams with Fenwal 2 and 4-wire bases,
please refer Fenwal Document 70.104.
INSTALLATION
Detector bases are directly mounted on the electrical junction
boxes (3", 3.5" and 4" octagonal, 3" round or 4" square) without
the need for any mechanical adapter required. Refer Fenwal
Document 70.104 for additional details.
The detector bases also include a locking feature that prevents
removal of the detector without use of a tool.
TESTINGAND MAINTENANCE
Testing shall be performed upon installation of the detector and
once a year thereafter as stated in NFPA-72 latest edition. All
alarm signal devices, releasing devices, and extinguishing
systems should be disengaged before the test is performed and
re-engaged at the conclusion of testing. Detectors may be tested
using a low power heat gun per instructions detailed in Fenwal
Document70.104. Failure to alarm in thistest indicates a detector
requiring service.
Therecommended requirementfor detectormaintenance consists
of an annual cleaning of dust from the detector head by using the
suctionof avacuum cleaner.Cleaning programs should be geared
to the individual environment in conformance with NFPA 72.
CAUTION
!
Do not attempt disassembly of the factory sealed
detector. This assembly is sealed for your protection
and should not be opened for servicing. Opening of
the detector will void its warranty.
SPARE PARTS
The Model THD-7052 and THD-7053 Detectors are factory re-
pairable only and have no field serviceable spare parts. No field
repair should therefore be attempted. For service, return detec-
tor head intact to Kidde-Fenwal.
ARCHITECT/ENGINEER SPECIFICATIONS
The contractor shall furnish and install where indicated on the
plans, thermistor-based electronic Fixed Temperature with Rate-
of-Riseof temperaturedetection featureFenwal ModelTHD-7052
HeatDetectors.The contractor shall also furnish and installwhere
indicated on the plans, thermistor-based electronic Fixed
Temperature Fenwal Model THD-7053 Heat Detectors. The fixed
temperature alarm set point of the THD-7052 and THD-7053
Detectors shall be 135F (57C) and the Rate-Of-Rise detection
feature of the THD-7052 shall be rated at 15F (8.3C) per minute.
The combination detector head and twist-lock base shall be UL
Listed compatible with a UL Listed fire alarm control unit. The
THD-7052 and THD-7053 Heat Detectors shall share
interchangeable bases with the PSD-7157 Photoelectric Smoke
Detectors and CPD-7054 Ionization Smoke Detectors.
The Fenwal Models THD-7052 and THD-7053 Heat Detectors
shall have two Red LEDs located diametrically opposite each
other so as to allow 360-degree viewing. The LEDs shall
continuously indicate the operating condition of the Detector.
During standby, the LEDs shall flash once every six seconds.
During alarm, both LEDs shall light steady at full brilliance. A
double flash every six seconds shall indicate a detector with a
thermistor trouble. The detector may be reset by actuating the
control panel reset switch. The vandal-resistant security locking
featureshall be used in those areas as indicated on the drawings.
The locking feature shall be field removable when not required.
It shall be possible to perform a functional test of the detector by
using an appropriate heat source.
The Fenwal Models THD-7052 and THD-7053 Heat Detectors
shall operate over an input voltage range from 10 to 33.5 VDC.
Voltageand RF transientsuppression techniques Supplementary
SPDT relays, remote test, and/or remote LED alarm indicators
shall be installed where indicated.
Table 1. Control Unit
Control Unit Compatibility Identifier Number Maximum Detectors per Loop
2210/2212 C10FE1 40
2410/2412 C10FE1 40
2320 C30FE1 15
3210 ZDM01, ZDMD01, VZM01 25
3220 C32FE1 40
Note: Please refer to Document 70.63 for compatiblity with other Fire Alarm Control Panels.

3
Table 2. Technical Specification
Model Number THD-7052 THD-7053
Part Number 70-520000-001 70-530000-001
Detection Electronic Heat Detector Electronic Heat Detector
Approvals cULus, FM, CSFM, MEA-NYC cULus, FM, CSFM, MEA-NYC
UL Compatibility I.D. P56FE1 P56FE1
Listed Spacing
For UL/ULC applications 70 foot (21.3m) centers or 4,900 square feet
(455.2 m
2
)70 foot (21.3m) centers or 4,900 square feet (455.2 m
2
)
For FM applications 35 foot (10.7m) centers or 1,225 square feet
(113.8 m
2
)35 foot (10.7m) centers or 1,225 square feet (113.8 m
2
)
Nominal Sensitivity 135
o
F (57
o
F) w/15
o
F (8.3
o
F) per minute
Rate-of-Rise 135
o
F (57
o
F)
Standby Voltage (VDC)
Using 2WB 10.2 to 36.8 10.2 to 36.8
Using 4WRB 16.8 to 36.8 16.8 to 36.8
Maximum Current
Standby 70 µA 70 µA
Alarm 100 mA 100 mA
Response Indicators
Quantity 2 external LEDs 2 external LEDs
Standby Condition One flash every 6 seconds One flash every 6 seconds
Thermistor Trouble Double flash every 6 seconds Double flash every 6 seconds
Alarm Condition Steady at full brilliance Steady at full brilliance
Operating Environment
Operating Temperature 32
o
to 100
o
F (0 to 38
o
C) 32
o
to 100
o
F (0 to 38
o
C)
Storage Temperature -20 to 180
o
F (-29
o
to 82
o
C) -20 to 180
o
F (-29
o
to 82
o
C)
Relative Humidity 0 to 93% Non-condensing 0 to 93% Non-condensing
Altitude Up to 7,500 feet (2,286 m) Up to 7,500 feet (2,286 m)
Physical Characteristics
Material and Finish High-impact, flame-retardant plastic, off white High-impact, flame-retardant plastic, off white
Weight 35.3 oz. (110g) w/o base 35.3 oz. (110g) w/o base
Dimensions
Detector Height 1.38 in (35 mm) 1.38 in (35 mm)
Detector Diameter 3.9 in (99 mm) 3.9 in (99 mm)
Base Height 0.43 in(11mm) 0.43 in(11mm)
Base Diameter 5.90 in (150 mm) 5.90 in (150 mm)

This literature is provided for informational purposes only. KIDDE-FENWAL,INC. assumes n
o
responsibility for the product's suitability for a particular application. The product must be prop
-
erly applied to work correctly.
If you need more information on this product, or if you have a particular problem or question
,
contact KIDDE-FENWAL INC., Ashland, MA 01721. Telephone: [phone]
R
Protection Systems
KIDDE-FENWAL, INC.
400 MAIN STREET, ASHLAND, MA 01721
TEL: [phone] FAX: [phone]
www.fenwalfire.com
TM
70.03 Rev. AA ©2006 Kidde-Fenwal Inc. Printed in USA
Table 4. Ordering Information
Part Number Model Description
Detector Heads - Ionization Smoke
70-540000-001 CPD-7054 Ionization Advanced Smoke Detector
(cULus)
70-540000-002 CPD-7054D Ionization Advanced Smoke Detector
(cULus)
Detector Heads - Photoelectric Smoke
71-570000-001 PSD-7157 Photoelectric Advanced Smoke Detector
(cULus)
71-570000-002 PSD-7157D Photoelectric Advanced Smoke Detector
(cULus)
Detector Heads - Heat
70-520000-001 THD-7052 135
o
F Fixed Heat Detector, 15
o
F Rate of Rise (cULus)
70-530000-001 THD-7053 135
o
F Fixed Heat Detector (cULus)
Detector Bases
70-501000-001 2-WIRE 2-Wire Standard Base
70-501000-002 2WRLT 2-Wire Base with Remote LED & Test Capabilities
70-501000-005 2WRB 2-Wire Base with Auxiliary Relay, Remote LED & Test Capabilities
70-501000-101 4WRB 4-Wire Base with Auxiliary Relay, Remote LED & Test Capabilities
70-500000-004 2WRM Spare 2-Wire Relay Module
70-500000-102 4WRM Spare 4-Wire Relay Module
Detector Accessories
06-117883-001 Test Magnet
29-116788-001 EOL Supervisory Relay
70-200000-911 RA-911 Remote Alarm Indicator
70-200000-914 RA-914 Remote Alarm Indicator withSmoke Detector Test Switch
70-500000-003 DST-003 Advanced Handheld Wireless Smoke Detector Sensitivity Tester
70-501000-003 MA-001 Mechanical Retrofit Adapter
Table 3. Detector Base Options
Part Number Model CID Description
70-501000-001 2-WIRE FE51A 2-W Base. Connects to circuit via screw terminals
70-501000-002 2WRLT FE52A 2-W Base w/ Remote LED & Test capabilities. Connects to detectionvia screw
terminals. Minimum Alarm Current 15 mA @ 24 VDC.
70-501000-005 2WRB FE55A 2-W Base w/ 2WRM, Remote LED & Test capabilities. Connects to detection circuit
via pigtail leads. Minimum Alarm Current 19 mA @ 24VDC
70-501000-101 4WRB N/A 4-W Base w/ 4WRM, Remote LED & Test capabilities. Connects to detectioncircuit
via pigtail leads. Minimum Alarm Current 35 mA @ 24VDC
70-500000-004 2WRM N/A SPDT Relay for 2WRB Bases. Contacts rated 1.0 A, 30 VDC/ 0.5 A, 125 VAC
70-500000-102 4WRM N/A SPDT Relay for 4WRB Bases. Contacts rated 1.0 A, 30 VDC / 0.5 A, 125 VAC
70-501000-003 MA-001 MAFE1 Mechanical Adapter allows CPD-705X & PSD-715X Detectors to physically connect to
Base P/Ns 70-201000-001, -002, -003, -005 & DH-22