resideo C554A Notice D'installation

C554A
Cadmium Sulfide Flame Detector
APPLICATION
The C554A Cadmium Sulfide Flame Detector (cad cell) is
a photoconductive 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.
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.
SOCKET
PLUG-IN-CELL
Fig. 1. C554A Cadmium Sulfide Flame Detector
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazard-
ous condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for
your application.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
LEADWIRE
MOUNTING
BRACKET
(cad cell).
CAUTION
Disconnect power supply before beginning
installation to prevent electrical shock or equipment
damage.
Location
The burner manufacturer determines the the cad cell
location (see Fig. 2). If an alternate location must be used,
make sure that:
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
located near the cell do not affect cell operation.
NOZZLE
M7854
Mounting
Direct Replacement
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
INSTALLATION INSTRUCTIONS
CAD CELL
IGNITION
ELECTRODE
AIR TUBE
Fig. 2. Cad cell location.
necessary.
IGNITION
TRANSFORMER
M7857
60-0164EF-01