The 5004-M-78 Flame Safeguard Replacement Chassis is specially designed to mount into existing Q7800A1005, Q7800B1003, or CB 780 (833-2725) wiring sub bases. It is a direct replacement for most RM7800E, RM7800L, and CB780 flame safeguard controllers. As with the 5004-M-85, the flame amplifier, through a jumper selection can accept UV, IR, or Flame Rod inputs. Purge timing, PTFI timing, and other control functions are determined by DIP switch selection.
Note: The 5004-M-78 includes, and replaces the programmer, display module, flame amplifier, and purge timer of the existing system.
Features
Our 5004-M-78 replaces an existing:
As with the 5004-M-85, the flame amplifier inputs are universal. Purge timing, PTFI timing, and other control functions are determined by DIP switch selection.
Mechanical
Enclosure: 7” L x 5” W x 2” D
Weight: 2 lbs
Operating Temperature: -40° F to +140° F (-40° C to +60° C), UV scanners -20° C to 60° C, IR scanner -30° C to 65° C
Electrical
Voltage: 120 VAC +10% - 15%, 50/60 Hz
Power Consumption: 2 VA
Flame Failure Response Time: 2.5 to 3.5 seconds
Purge Time: 30, 60, 90, 150, 180, 300, 450, or 900 seconds (DIP switch selectable)
Pilot Trial for Ignition Time: 3, 5, or 10 seconds (DIP switch selectable)
Flame Sensor Inputs (2): Infrared, Ultraviolet, Flame Rod
Controller Configuration
Configuration of the controller is done by setting the DIP switches located under the LCD display.
DIP switch 1 sets the power-up response of the controller.
DIP switches 2 through 4 set the purge timing.
DIP switches 5 and 6 set the desired Pilot Trial for Ignition (PTFI) time.
DIP switch 7 activates the Limits Bypassed check. When DIP switch 7 is ON, the controller waits up to 60 seconds for the Limits Made input to de-energize. After 60 seconds the control will lockout. When DIP switch 7 is OFF, the control will continue into Purge even if the Limits Made input is energized when the Start input is energized.
DIP switch 8 is used for configuring Modbus. During normal operation, DIP Switch 8 MUST be OFF.
Note: After 4 hours of continuous operation, ALL current DIP switch settings will be recorded in non-volatile memory. Subsequent DIP switch changes will be ignored.
Microprocessor Flame Safeguard Controller: Controller shall be U.L. recognized for single burner boiler applications. It shall screw into the existing Honeywell or Cleaver Brooks wiring base. It shall accept inputs from one or two flame detectors without external circuitry. The controller shall be capable of accepting inputs from ultraviolet, infrared, self-checking ultraviolet, and flame rod detectors without changing controller hardware. Purge timing, Pilot Trial for Ignition (PTFI) timing, and other control functions shall be DIP switch selectable.
Flame Safeguard Controller Hardware: Controller and included flame amplifier circuity shall be microprocessor-based and include the following as a minimum:
Flame Safeguard Functions: The controller shall cycle the burner from Standby, through Purge, supervised Pilot Trial for Ignition, Main Flame Trial for Ignition and Release to Modulate states. De-energization of pre-ignition interlocks, running interlocks, or loss of flame signal shall result in the safe shutdown of the burner. Additional control functions shall include:
Digital Communication: The flame safeguard controller shall be capable of Modbus RTU communications via RS-485 bus.
Manufacturer: The flame safeguard controller shall be model 5004-M-85 manufactured by Preferred Instruments of Danbury, CT.
| Operating Temperature | -40° F to +140° F (-40° C to +60° C), UV scanners -20° C to 60° C, IR scanner -30° C to 65° C |
|---|---|
| Voltage | 120 VAC +10% - 15%, 50/60 Hz |
| Flame Failure Response Time | 2.5 to 3.5 seconds |
| Purge Time | 30, 60, 90, 150, 180, 300, 450, or 900 seconds (DIP switch selectable) |
| Pilot Trial for Ignition Time | 3, 5, or 10 seconds (DIP switch selectable) |
Download Product Information:
5004-M-78 Flame Safeguard Replacement Chassis Cutsheet (Catalog 25)
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