Honeywell C7024F User Manual

Solid State Purple Peeper
Ultraviolet Flame Detectors
The C7204E,F 24 Vdc Flame Detectors are
solid-state electronic devices for sensing the
ultraviolet radiation emitted by the combustion
of most carbon containing fuels such as natu-
ral gas, LP gases, and oil.
C7024E,F:
Solid-state electronic circuitry provides low power
consumption and high reliability.
Detectors can be mounted horizontally, vertically or
at any angle in between. The self-checking models
require faceplate alignment and have integral lo-
cating reference points to assure proper operation
of the shutter mechanism.
Ultraviolet radiation sensing tube and quartz view-
ing window are field replaceable.
Threaded conduit fitting and color-coded lead-
wires allow rapid electrical installation.
Two flame detectors can be wired in parallel to
reduce nuisance shutdowns in difficult flame sight-
ing applications.
A swivel mount is available to facilitate flame
sighting.
Models are available with a -40° F [-40° C] rating.
Incorporates UV sensor tube checking feature
used with Honeywell dynamic self-check R7824C
Flame Signal Amplifiers.
Oscillating shutter interrupts ultraviolet radiation
reaching UV sensor 12 times per minute to provide
the UV sensor checking function. Amplifier cir-
cuitry components are checked from the micro-
processor in the RM7824.
C7024E,F 24 Vdc
C7024E:
Housing meets NEMA 4 enclosure standards (in-
door, outdoor protection: rain-tight, dust-tight, hose
directed water).
Protective heat block built into the mounting flange.
High pressure (50 psi) [345 kPa] quartz viewing
window, focusing lens and antivibration mount-
ing accessories available.
C7024F:
Housing designed to be explosion-proof and Un-
derwriters Laboratories Inc. Component Recognized
for use in hazardous locations: Class 1, groups C
and D, and Class 2, groups E, F and G.
Viewing window rated for 100 psi [690 kPa].
CONTENTS
Specifications ................................................. 2
Ordering Information ..................................... 2
Installation ..................................................... 3
Adjustments and Checkout ............................. 9
Troubleshooting ........................................... 10
Service .......................................................... 11
L.Z. • Rev. 4-94 • ©Honeywell Inc. 1994 • Form Number 65-0156-1 1 65-0156-1