resideo C554A Cadmium Sulfide Flame Detector User Guide
- June 7, 2024
- resideo
Table of Contents
C554A
Cadmium Sulfide Flame Detector
PRODUCT DATA
APPLICATION
The C554A Cadmium Sulfide Flame Detector (cad cell) is a photoconductive flame detector used with oil primary controls such as R4166, R4184, R8182, R8184, R8185, R8404, and R8991.
FEATURES
- Cadmium sulfide sensing element provides a faster response than bimetal sensors.
- On flame failure, the cad cell causes the oil primary control to shut down the main burner.
- Mounting brackets are available to fit all applications.
- The entire cell is hermetically sealed (glass to metal) to reduce cell deterioration by humidity, soot, or oil fumes.
- Plug-in cell for easy replacement.
- The recessed cell provides more accurate flame sighting and prevents the accumulation of dirt and soot on the cell face.
SPECIFICATIONS
Important
The specifications given in this publication do not include normal
manufacturing tolerances. Therefore, this unit might not exactly match the
listed specifications. Also, this product is tested and calibrated under
closely controlled conditions, and some minor differences in performance can
be expected if those conditions are changed.
Models:
C554A Cadmium Sulfide Flame Detector two-wire, two-piece plug-in cell for use
with oil primary controls such as R4166, R4184, R8182, R8184, R8185, R8404,
and R8991.
Electrical:
Maximum voltage 60 Vdc or 60 Vac peak.
Ambient Temperature:
140ºF(60ºC) at the cell.
Dimensions:
See Fig. 1.
Mounting (see Fig. 1):
See product description for included mounting brackets
Leadwire:
Yellow, single-molded, dual-cord, number 18 stranded wire.
NEC Class 1. Varied lengths were available on request.
Certifications:
Underwriters Laboratories Inc. Listed: File Number MP268, Guide Number MCCZ.
Canadian Standards Association Component Listed: File Number LR1620, Guide
Number 300-1-0.2.
Replacement Part:
130367 Replacement Cad Cell.
Fig.1.Mounting bracket dimensions in in. (mm)
SOCKET DIMENSIONS AND PLACEMENT OF BRACKET HOLES ARE THE SAME AS FOR TYPE A EXCEPT WHERE NOTED.
INSTALLATION
When Installing this Product
- Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition.
- Check the ratings given in the instructions and on the product to make sure the product is suitable for your application.
- The installer must be a trained, experienced service technician.
- After installation is complete, check out the 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:
- The cell has a clear view of the flame.
- Ambient light does not reach the cell.
- The ambient temperature at the cell location is below 140ºF (60ºC).
- Movement, shielding, or radiation of metal surfaces located near the cell do not affect cell operation.
Mounting
Direct Replacement
-
Select the mounting bracket that most closely matches the existing mounting bracket or use the bracket provided.
-
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. -
While holding the mounting bracket in the slot, insert the screwdriver in the other end of the slot (Fig. 3). Bend the screwdriver, first to the left and then to the right, to crimp the end of the mounting bracket and hold it in position.
-
Remove the screwdriver and replace the cell.
-
Mount the new cell and bracket assembly in the location of the mold assembly.
Oil Line Mounting
If desired, mount the C554A on the oil line using the oil line adapter bracket
and the mounting bracket that gives the C554A the best view of the flame or
use the mounting bracket provided. Select the mounting bracket that most
closely matches
-
Remove the cell from the socket.
-
Insert the mounting bracket into the slot on the socket (Fig. 4) as far as it will go.
NOTE: Bend the mounting bracket to fit, if necessary.
-
While holding the mounting bracket in the slot, insert the screwdriver in the other end of the slot (Fig. 4). Bend the screwdriver, first to the left and then to the right, to crimp the end of the mounting bracket and hold it in position.
-
Remove the screwdriver and replace the cell.
-
Slide the mounting bracket into the sleeve on the oil line adapter bracket. Push firmly to lock the cell and the bracket assembly in position.
-
Mount the oil line adapter bracket on the oil line using the screw and nut provided (Fig. 5).
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. 6
for a typical C554A hookup to the oil burner primary control.
OPERATION
The C554A Cadmium Sulfide Flame Detector consists of a plug-in, light-
sensitive cell, and a socket with lead wire. The photocell is a ceramic disk,
coated with cadmium sulfide and overlaid with a conductive grid. The entire
cell is hermetically sealed (glass to metal) to prevent cell deterioration.
Electrodes attached to the ceramic disk transmit an electrical signal to the
primary control, which operates the main burner. In the 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 to
the primary control. Flame failure causes the cell to stop conducting
electricity, resulting in the primary control shutting off the burner. Fig. 7
shows the
sensitivity range of the cad cell.
CHECKOUT
To check cad cell operation, use the following procedure:
-
Disconnect the cad cell lead wires; then start the burner. Shortly after the burner starts, place a temporary jumper between terminals F-F. Connect an ohmmeter across cad cell lead wires; resistance should be less than 1600 ohms.
-
Stop the burner and remove the temporary jumper.
-
With the burner off, check the dark cell resistance across cad cell lead wires. 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 the plug-in part of the cell, part no. 130367 ReplacementCad Cell. -
Reconnect cad cell lead wires. Check the Protectorelay® Burner Sequencing Relay control according to the instructions packed with the control.
SERVICE AND REPLACEMENT
In normal operating conditions, the C554A does not require cleaning. If a
badly adjusted burner causes a heavy accumulation of dirt and soot on the cell
surface, carefully wipe the cell surface to restore a full view of the oil
flame.
If the C554A is damaged, replace the plug-in part of the cell. Order part no.
130367 Replacement Cad Cell.
Resideo Technologies, Inc.
1985 Douglas Drive North, Golden Valley, MN 55422
1-800-468-1502
60-2148—05 M.S. Rev. 07-21 | Printed in the United States
© 2021 Resideo Technologies, Inc. All rights reserved.
This product is manufactured by Resideo Technologies, Inc. and its affiliates.
C554A CADMIUM SULFIDE FLAME DETECTOR
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