Fenwal Controls 17343 Series Operation And Maintenance Instruction

17343-124
Operation and Maintenance Instructions
For Fire/Overheat Detector
DESCRIPTION
The Fire/Overheat Detector, shown in Figure 1 is a normally
open device that helps to monitor fire and overheat conditions.
It can be used in locations with high ambient temperatures.
The detector is made from welded stainless steel and is com-
pletely sealed. It is not repairable and cannot be disassembled.
The detector is set to a specific alarm temperature when it is
made at the factory and the temperature cannot be adjusted.
The detector electrically connects to its related equipment
through two terminal posts with internal threads. Stainless steel
screws attach the wiring from the related equipment to the two
terminals. The detector mechanically attaches to the monitored
area by 3/4-14 National Pipe Thread (NPT) located on the head
of the detector.
Korean Cert # 14-KB4BO-0749U
Ex nC IIC T3
II 3G IIC Gc IECEx ETL 12.0008U
ITS03ATEX41211U
Class I, Division 1, Groups BCD
CSA: 159064
UL: E139663
The following details are shown on a detector head:
• Customer Part Number
• Customer Code
• Part Number: 17343-124
• Date Code: XXYY (where XX = year, YY = week)
.618 ±.006
F-03-002
CAUTION
Do not use any
anti-seize,thread
locking compound
or lubricants on
the NPT threads
3/4-14 NPT
DATA LOCATIONS
COLOR
CODE
3.500 ±0.31
5.808 ±.065
Figure 1. Fire/Overheat Detector
Schedule of Limitations for Ex Components:
• The detector must be mounted in a suitably IEC Ex
certified enclosure that complies with the appropriate
requirements for zone 2 applications.
• Maximum surface temperature is dependent on
ambient temperatures and must be determined in the
final
assembly installation. The temperature rise of the
outside of the shell should not exceed 2°C above
ambient when
carrying the maximum power load of 62.5W (.5A, 125
VDC).
Limitations for Class I Div I Group BCD
Components:
• The detector must be mounted in a certified enclosure
with the appropriate Class, Division, and Group Ratings
for the application.
• The Fire/Overheat Detector has a color band on the
end opposite the electrical connection points. The color
band is an indication of the temperature range of the
detector. Refer to the color code chart that follows for
the color band of the detectors and additional data.
Color Code Chart
Temperature Set-Point
140°F±7.5°F (60°C±4.2°C)
325°F±10°F (163°C±5.6°C)
425°F±15°F (218°C±8.3°C)
600°F±20°F (316°C±11.0°C)
725°F±25°F (385°C±14°C)
The settings are noted by the color of the band applied to the tip of
the heat detector shell of 17343-124.
STAINLESS STEEL
NO. 8-32 UNC-2A STAINLESS
STEEL SLOTTED HEX HEAD
SCREW WITH INTEGRAL
LOCKWASHER, 2 PLACES.
PROTECTION CAP
1.125
F-03-002
October 2016
Color Band
None
Red
Green
Orange
Grey
CAUTION
Do not apply
more than 25 inch
pounds (2.82 Nm)
of torque to the
terminals.
Rev AA