Honeywell C554A Manuale utente

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:

쐃The cell has a clear view of the flame.

쐇Ambient light does not reach the cell.

쐋Ambient temperature at the cell location is below

140°F (60°C).

쐏Movement, shielding, or radiation of metal surfaces

near the cell do not affect cell function.

C554A

Cadmium Sulfide Flame Detector

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

60-0348—2 2

C554A CADMIUM SULFIDE FLAME DETECTOR

AIR TUBE

IGNITION

ELECTRODE

IGNITION

TRANSFORMER

CAD CELL

NOZZLE

M7857

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 WALL

CADMIUM SULFIDE CELL

M7863

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.

THERMOSTAT

(24V)

C554A

CADMIUM SULFIDE

FLAME DETECTOR

OIL BURNER RELAY

M7858

Fig. 4.Typical hookup for C554A to oil burner

primary control.

CHECKOUT

To check cad cell operation, use the following procedure:

쐃Disconnect 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.

쐇Stop burner and remove temporary jumper.

쐋With 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.

쐏Reconnect cad cell leadwires. Check the

Protectorelay®(burner sequencing relay) control

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.

60-0348—2 J.S. Rev. 2-96

Automation and Control Solutions

Honeywell International Inc. Honeywell Limited—Honeywell Limitée

1985 Douglas Drive North 35 Dynamic Drive

Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9

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