Flue Gas Temperature Monitor
JC-15D2
The JC-15D2 Flue Gas Temperature Monitor is a digital Indicator and Alarm. Flue gas temperature is displayed on a backlit color touchscreen LCD display. An intuitive bargraph display and alarm messages provide clear stack temperature status. Bargraph Scaling, Alarm Setpoints, and Time Delays are all field selectable. All adjustments can be made directly from the faceplate of the instrument by navigating through user friendly menus.
Why should Flue Gas Temperature be Monitored ?
- Every 40° F increase in Flue Temperature results in an approximate 1% decrease in boiler/furnace efficiency.
- High Flue Temperature can indicate a need to clean soot or scale build-up on the tubes.
- High Flue Temperature can indicate fallen refractory, baffle damage, short circuiting, or overfiring.
- High Flue Temperature can indicate insufficient feedwater
- Hartford Steam records show that boiler overheating is the primary reason for boiler damage.
- Overview and Features
- Application
- Specifications
- Documents
The JC-15D2 Flue Gas Temperature Monitor is a digital Indicator and Alarm. Flue gas temperature is displayed on a backlit color touchscreen LCD display. An intuitive bargraph display and alarm messages provide clear stack temperature status. Bargraph Scaling, Alarm Setpoints, and Time Delays are all field selectable. All adjustments can be made directly from the faceplate of the instrument by navigating through user friendly menus. JC_Edit PC software can also be used to configure the JC-15D2 via the USB port and to import the Alarm/Event History into JC_Edit. Any J or K thermocouple can be used with the JC-15D2 to sense the temperature. The 20” 104087D and the 12” 104087E are constructed with an Inconel sheath for corrosion protection, ½" male NPT process connection, cast iron head with terminal block, and ½" female NPT electrical connection.
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Precise digital Temperature Indication
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Type J or K thermocouple Input
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Field selectable: T/C type, F/C, Alarm Setpoints, Alarm Delays
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Manual Reset High-High “shutdown” Alarm
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Color Touchscreen
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50 pt Alarm/Event History, Time/Date Stamped
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Only 4 7/8” deep, fits in most existing burner control cabinets
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Plug-in field wiring terminals
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Ethernet, RS485, and 4-20mA outputs for Bldg Automation Systems
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USB port for configuration read/write with free JC_Edit Windows software
The JC-15D2 is used to monitor boiler efficiency (higher stack temperature translates into lower efficiency) and as a high stack temperature switch. According to the Hartford Steam Boiler Inspection and Insurance Co., “Three out of every four (boiler) accidents are caused by overheating, and 80% of the overheating losses resulted from continued firing with low water levels; despite the fact that boilers, …are equipped with up-to-date controls.”
When a boiler runs out of water, the stack temperature gets very high very fast. A high stack temperature switch can alert the flame safeguard system and shut down the burner before the boiler is damaged, and potentially prevent a boiler explosion.
Panel
Power Supply: 120Vac +/-15%, 50/60 Hz, 26 VA
Case Size: 3 1/2” w x 7 9/16” h x 4 7/8” d
Enclosure Type: NEMA 12 Faceplate
Ambient Temperature: 32° - 131° F (0-55° C)
Displays: High Contrast LCD Display, 4" high, 0.5% Resolution Bar Graph
Bar Graph Range: 0°-2000° F field adjustable
Alarm Setpoints: Two (2) Adjustable With Adjustable Time Delays
Inputs
Input Types: Type J or Type K Thermocouple, Field Selectable
Accuracy: 0.1 deg F resolution 0.5 F linearity
Break Protection: Upscale
Outputs
Relay: (2) 120VAC,10 A SPDT
Retransmit: 4-20 mA, 650 Ohm Load Maximum (field adjustable scaling)
Network: RS485 and Ethernet (see Modbus) USB for JC_Edit Windows App
Thermocouple
Assembly: Type J Ungrounded
Probe Material: Inconel
Insertion Length: 20"
Connection: ½" MNPT
Flue-Gas-Temperature-Monitor Controller Specification
Flue-Gas-Temperature-Monitor Controller Brochure
Flue-Gas-Temperature-Monitor Controller Manual
Model ‘D’ Versus Model ‘D2’ Wiring Comparison