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C554A CADMIUM SULFIDE FLAME DETECTOR
CAD CELL
IGNITION
ELECTRODE
AIR TUBE
NOZZLE
Fig. 2. Cad cell location.
The orifice (available on some models) reduces the
amount of light available to the photocell minimizing the
chance that the cell will respond to the glow from the hot
refractory. See Fig. 3 for a cutaway view of the orifice.
ORIFICE
CADMIUM SULFIDE CELL
Fig. 3. Cutaway view of orifice.
Mounting
Mount the C554A at the rear of the burner. The mounting
bracket can be bent to fit, if necessary.
Wiring
Disconnect power supply before beginning wiring to
prevent electrical shock or equipment damage.
All wiring must comply with local electrical codes and
ordinances. See Fig. 4 for a typical C554A hookup to the
oil burner primary control.
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
60-0348—2 J.S. Rev. 2-96
60-0348—2
IGNITION
TRANSFORMER
M7857
WALL
M7863
Honeywell Limited—Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario M1V 4Z9
THERMOSTAT
(24V)
C554A
CADMIUM SULFIDE
FLAME DETECTOR
Fig. 4. Typical hookup for C554A to oil burner
primary control.
CHECKOUT
To check cad cell operation, use the following procedure:
Disconnect cad cell leadwires; then start the
burner. Shortly after the burner starts, place a
temporary jumper between terminals F-F. Connect
an ohmmeter across the cad cell leadwires;
resistance should be less than 1600 ohms.
Stop burner and remove temporary jumper.
With the burner off, check the dark cell resistance
across the cad cell leadwires. Resistance should
be greater than 20,000 ohms.
NOTE: If cell resistances are different than
specified, recheck the wiring and the
location of the cell. If necessary, replace
plug-in portion of cell, Honeywell part no.
130367 Replacement Cad Cell.
Reconnect cad cell leadwires. Check the
Protectorelay
®
according to the instructions packed with the
control.
SERVICE AND REPLACEMENT
Under normal operating conditions, the C554A does not
require cleaning. If a badly adjusted burner causes
heavy accumulation of dirt and soot on the cell surface,
carefully wipe the cell surface to restore full view of the
oil flame.
If the C554A is damaged, replace the plug-in portion of
the cell. Order Honeywell part no. 130367 Replacement
Cad Cell.
2
OIL BURNER RELAY
T
T
F
F
(burner sequencing relay) control
M7858
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