Flue Gas Temperature Monitor

JC-15D

The JC-15D Flue Gas Temperature Monitor is a microprocessor based indicating instrument with a heavy duty Thermocouple Assembly. Flue gas temperature is continuously displayed using a highly visible backlit LCD display. An intuitive bar graph display and alarm messages provide clear stack temperature status. Bar graph Scaling, Alarm Setpoints, and Time Delays are all field selectable. All adjustments can be made directly from the faceplate of the instruments by scrolling through user friendly, English language menus. The type J Thermocouple Assembly is constructed of a seal welded inconel sheath for corrosion protection, and can be directly installed in the boiler's flue gas outlet. The unit includes a ½" male NPT process connection, cast iron head with thermal block, and ½" female NPT electrical connection.

  • RS485 Modbus Communication

  • 4-20mADC Retransmission

  • 4 Digit Display

  • 200 Segment Bar Graph

  • Large LCD Graphic Display

  • Overview and Features
  • Application
  • Specifications
  • Documents
Overview and Features

The JC-15D Flue Gas Temperature Monitor is a microprocessor based indicating instrument with a heavy duty Thermocouple Assembly. Flue gas temperature is continuously displayed using a highly visible backlit LCD display. An intuitive bar graph display and alarm messages provide clear stack temperature status. Bar graph Scaling, Alarm Setpoints, and Time Delays are all field selectable. All adjustments can be made directly from the faceplate of the instruments by scrolling through user friendly, English language menus. The type J Thermocouple Assembly is constructed of a seal welded inconel sheath for corrosion protection, and can be directly installed in the boiler's flue gas outlet. The unit includes a ½" male NPT process connection, cast iron head with thermal block, and ½" female NPT electrical connection 

  • RS485 Modbus Communication

  • 4-20mADC Retransmission

  • 4 Digit Display

  • 200 Segment Bar Graph

  • Large LCD Graphic Display

  • Field Adjustable Using English Language Menus

  • Low Boiler Efficiency Alarm Message and Contact

  • Burner Shutdown Contact and Message

Application

The JC-15D 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. 

Specifications

Panel 

Power Supply: 120 VAC, +/- 15%, 50/60 Hz, 15 VA

Case Size: 8"H x 3.5"W x 7.5"D

Enclosure Type: NEMA 4 Faceplate

Ambient Temperature: +32° to 122° F

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: 0.005% Resolution, 0.07% Accuracy

Break Protection: Upscale   

Outputs 

Relay: Two SPDT Relays 10 A Resistive, 8 FLA, ½ HP, 120 VAC

Retransmit: 4-20 mADC, 650 Ohm Load Maximum

Network: 1200 - 38400 Baud; RS485 Modbus, ASCII or RTU 

Thermocouple 

Assembly: Type J Ungrounded

Probe Material: Inconel

Insertion Length: 20"

Connection: ½" MNPT 

Documents

Flue-Gas-Temperature-Monitor Controller Specification

Flue-Gas-Temperature-Monitor Controller Brochure

Flue-Gas-Temperature-Monitor Controller Manual