INSTALLATION
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.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
CAUTION
Disconnect power supply before beginning
installation to prevent electrical shock or equipment
damage.
Location
The burner manufacturer determines the cad cell
location (see Fig. 2). If an alternate location must be
used, make sure that:
쐃
The cell has a clear view of the flame.
쐇
Ambient light does not reach the cell.
쐋
Ambient temperature at the cell location is below
140
°
F (60
°
C).
쐏
Movement, shielding, or radiation of metal surfaces
near the cell do not affect cell function.
C554A
Cadmium Sulfide Flame Detector
Copyright © 1996 Honeywell Inc. • All Rights Reserved
X-XX UL
INSTALLATION INSTRUCTIONS
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 factory-installed
mounting bracket and leadwire. The detector is installed
inside the air tube of the burner where the cell can view
the flame. It 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.
Fig. 1. C554A Cadmium Sulfide Flame
Detector (cad cell).
M7854
PLUG-IN-CELL
MOUNTING
BRACKET
SOCKET
LEADWIRE
60-0348-2
