Flue Gas Temperature

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.

Low Boiler Efficiency Alarm Message and Contact

• Elevated stack temperature will indicate reduced boiler efficiency
• Every 40F increase in flue gas temperature results in an approximate 1% decrease in boiler efficiency

Burner Shutdown Contact and Message

• Dangerously high temperatures place the boiler at risk of serious over-heating damage
• Provides additional protection against mud-filled low water cut out float switch failures

High Visibility Bargraph and Numeric Display

• 4 Digit Numeric Display
• 200 Segment Bargraph
• Bargraph Alarm Setpoint Markings
• High Intensity, Long Life LED Backlighting
• NEMA 4 Front Panel

Field Adjustable using English-Language Menus

• Inputs: Type J or K Thermocouple
• 4-20 mAdc Output Scaling
• Fahrenheit or Centigrade
• Bargraph Scaling
• Alarm Modes, Setpoints, Deadbands, and Time Delays

Flexible Communications for Data Logging

• 4-20 mAdc Temperature Re-transmission
• RS485 Modbus Interface

Thermocouple Assembly

• Type J Thermocouple
• Constructed of a seal welded inconel sheath for corrosion protection
• Can be directly installed in the boiler’s flue gas outlet
• It includes a ½” male NPT process connection, cast iron head with thermal block, and ½” female NPT electrical connection

Thermocouple Assembly Model 104087D

Typical Arrangement

Panel
Power Supply: Case Size: Enclosure Type: Ambient Temp.: Displays: Bargraph Range: Alarm Setpoints:	120Vac, +/- 15%, 50/60Hz, 15 VA 8"H x 3.5"W x 7.5"D NEMA 4 faceplate +32° to 122° F High Contrast LCD Display 4" high, 0.5% Resolution Bargraph 0°-2000° F field adjustable Two (2) adjustable with adjustable time delays
Inputs
Input Types: Accuracy: Break Protection:	Type J or Type K Thermocouple, field selectable 0.005% Resolution, 0.07% Accuracy Upscale
Outputs
Relay: Retransmit: Network:	Two SPDT Relays 10 A resistive, 8 FLA, ½ Hp, 120 Vac 4-20 mAdc, 650 ohm load maximum 1200 - 38400 Baud; RS485 Modbus, ASCII or RTU
Thermocouple
Assembly: Probe Material: Insertion Length: Connection:	Type J ungrounded Inconel 20" ½" MNPT

Note: For more information on Type K Thermocouple, please contact the factory

1. JC-15D Instruments
2. 104087D Type J Thermocouple Assembly
3. 101668C16 unshielded Type J Thermocouple Wire
   92088-J-B20PP shielded Type J Thermocouple Wire
   (Specify wire length in multiples of 25 feet)
4. Optional Accessories:
   SDA-B6 Alarm Bell, 85 dB, weatherproof
   SDA-VB Remote Audible/Visual Alarm