C554A
Cadmium Sulfide Flame Detector
INSTALLATION INSTRUCTIONS
APPLICATION
CAUTION
Disconnect power supply before beginning
installation to prevent electrical shock or equipment
damage.
The C554A Cadmium Sulfide Flame Detector (cad cell) is
a photo conductive flame detector (see Fig. 1) used with
oil primary controls such as R4166, R4184, R8182,
R8184, R8185, R8404 and R8991. It consists of a plug-in,
light sensitive cell and a socket with Type E mounting
bracket, factory-installed leadwire and an oil line adapter
bracket. Leadwire length is 60 in. (1520 mm). The detector
is installed inside the air tube of the burner where the cell
can view the flame and is wired to the F-F terminals of the
oil primary control.
Location
The burner manufacturer determines the cad cell location
(see Fig. 2). If an alternate location must be used, make
sure that:
³
·
»
The cell has a clear view of the flame.
Ambient light does not reach the cell.
Ambient temperature at the cell location is below
140°F (60°C).
Movement, shielding, or radiation of metal surfaces
near the cell do not affect cell function.
The photocell is a ceramic disk coated with cadmium
sulfide and overlaid with a conductive grid. Electrodes
attached to the ceramic disk transmit an electrical signal to
the primary control. In darkness, cadmium sulfide has a
very high resistance to the passage of electrical current. In
visible light, its resistance is very low and current is
allowed to pass. The entire cell is hermetically sealed
(glass to metal) to prevent cell deterioration.
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IGNITION
TRANSFORMER
CAD CELL
IGNITION
ELECTRODE
AIR TUBE
SOCKET
LEADWIRE
NOZZLE
MOUNTING
BRACKET
M7854
PLUG-IN-CELL
Fig. 1. C554A Cadmium Sulfide Flame
Detector (cad cell).
M7857
INSTALLATION
Fig. 2. Cad cell location.
When Installing this Product…
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a
hazardous condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for
your application.
Mounting
Direct Replacement
³
·
Remove the cell from the socket.
Insert the mounting bracket into the socket slot
(Fig. 3) as far as it will go.
NOTE: Bend the mounting bracket to fit, if
necessary.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
®U.S. Registered Trademark
Copyright © 1996 Honeywell Inc. • All Rights Reserved
60-0164-1
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C554A CADMIUM SULFIDE FLAME DETECTOR
SCREW
OIL LINE ADAPTER
BRACKET
CHECKOUT
To check cad cell operation, use the following procedure:
OIL LINE
TO
NOZZLE
³
Disconnect cad cell leadwires; then start burner.
Shortly after burner starts, place a temporary jumper
between terminals F-F. Connect an ohmmeter
across cad cell leadwires; resistance should be less
than 1600 ohms.
MOUNTING
BRACKET
·
»
Stop burner and remove temporary jumper.
With burner off, check dark cell resistance across
cad cell leadwires. Resistance should be greater
than 20,000 ohms.
PLUG-IN
CELL
SOCKET
M7856
LEADWIRE
NOTE: If cell resistances are different than
specified, recheck wiring and location of
cell. If necessary, replace plug-in portion of
cell, Honeywell part no. 130367 Replace-
ment Cad Cell.
Fig. 5. Use oil line adapter bracket to mount
C554A on oil line.
Wiring
¿
Reconnect cad cell leadwires. Check the
Protectorelay (burner sequencing relay) control
according to the instructions packed with the control.
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. 6 for a typical C554A hookup to the
oil burner primary 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.
OIL BURNER RELAY
THERMOSTAT
(24 VOLT)
T
T
F
F
If the C554A is damaged, replace the plug-in portion of the
cell. Order Honeywell part no. 130367 Replacement Cad
Cell.
C554A
CAD CELL
M7858
Fig. 6. Typical hookup for C554A to oil
burner primary control.
3
60-0164—1
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Automation and Control Solutions
Honeywell Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario
M1V 4Z9
60-0164—1 J.S. Rev. 2-96
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