Submittal Sheet

ManualsBrandsHoneywell ManualsGas and Oil Burner Accessories48" Infrared Flame Sensor

Table Of Contents

PRODUCT DATA

65-0292

C7915A Infrared Flame Detector

APPLICATION

The C7915A Flame Detector includes a lead sulfide photocell

that is sensitive to the infrared radiation emitted by the

combustion of fuels such as natural gas, oil, and coal.

• Particularly suitable for combination or dual-fuel

applications.

• When installed properly, can supervise the pilot flame and/

or the main burner flame.

• Mounts easily on a standard 3/4 inch sight pipe.

• The infrared sensor plugs into an electrical socket in the

C7915A assembly and is field replaceable.

• The lead sulfide photocell’s sensitivity to infrared radiation

is compatible with a wide range of flame supervisory

applications.

• Flexible metal cable protects and electrically shields the

detector coaxial cables.

• Accessories available include a heat block, seal-off

adapter, reducer bushing, and orifice plate.

SPECIFICATIONS

STANDARD MODELS

MODELS: See Table 6 for flame safeguard controls and asso-

ciated amplifiers.

DETECTOR RESPONSE: Responds to infrared radiation with

wavelengths between 0.75 and 1.0 micron.

LEAD SULFIDE PHOTOCELL: Photoconductor resistance

decreases as incident radiant energy increases.

AMBIENT TEMPERATURE RATING: -40°F–125°F (-40°C–

52°C) maximum at the lead sulfide photocell.

MOUNTING:

C7915A Mount—knurled collar with 3/4-14 NPSM internal

threads for mounting on a standard 3/4 in. pipe (see Fig. 1).

32007255-001 Lead Sulfide Photocell—two leads for inserting

into socket in C7915A (see Fig. 8).

Contents

Application ........................................................................ 1

Specifications ................................................................... 1

Ordering Information ........................................................ 2

Operation .......................................................................... 3

Installation ........................................................................ 3

Wiring ............................................................................... 8

Adjustments and Checkout .............................................. 10

Troubleshooting ................................................................ 11

Summary of content (12 pages)

PAGE 1
C7915A Infrared Flame Detector PRODUCT DATA • When installed properly, can supervise the pilot flame and/ or the main burner flame. • Mounts easily on a standard 3/4 inch sight pipe. • The infrared sensor plugs into an electrical socket in the C7915A assembly and is field replaceable. • The lead sulfide photocell’s sensitivity to infrared radiation is compatible with a wide range of flame supervisory applications. • Flexible metal cable protects and electrically shields the detector coaxial cables.
PAGE 2
C7915A INFRARED FLAME DETECTOR Table 1. Models Available. Coaxial Cable Length Model (in.) 50019469-001 Components Included Lead Sulfide Cell (m) Bushing With Magnifying Lens 105134 Orifice Platea C7915A1010 30 0.76 32007255-001 X X C7915A1036 96 2.44 32007255-001 X X C7915A1028 48 1.22 32007255-001 X X 105061 Heat Blockb 390427A Reducer Bushingc X X a With 0.125 in. (3.175 mm) diameter hexagonal orifice to reduce the detector field of view.
PAGE 3
C7915A INFRARED FLAME DETECTOR C7915A MOUNT 1 2 [58] 4 9 16 [14] 105172A SEAL-OFF ADAPTER 11 1 16 [43] 17 32 [13.
PAGE 4
C7915A INFRARED FLAME DETECTOR CAUTION Electrical Shock Hazard. 1. Disconnect power supply before beginning installation to prevent electrical shock and equipment damage; there may be more than one disconnect. 2. All wiring must be NEC Class 1 (line voltage). 3. Use the C7915A only with Honeywell lead sulfide photocells (part no. 32007255-001) and flame signal amplifiers specified (see Table 6). Proper flame detector installation is the basis of a reliable flame safeguard installation.
PAGE 5
C7915A INFRARED FLAME DETECTOR . Table 2. Diameter of Area Sighted Through Various Lengths of 3/4-in. Pipe Without Orifice, in in. Length of Pipe—in. 1 2 3 4 5 6 7 8 6 6.3 3.5 2.6 2.1 1.8 1.6 1.5 1.4 12 11.9 6.3 4.4 3.5 2.9 2.6 2.3 2.1 Distance From End of Pipe To Sighted Area—in. 24 30 36 42 48 54 60 23.2 28.4 34.5 Over 40 11.9 14.8 17.6 20.4 23.2 26.0 28.9 8.2 10.1 11.9 12.9 15.7 17.6 19.5 6.3 7.8 9.1 10.6 11.9 13.4 14.8 5.2 6.3 7.5 8.6 9.7 10.7 11.9 4.4 4.3 6.3 7.3 8.2 9.1 10.1 3.9 4.7 5.5 6.3 7.
PAGE 6
C7915A INFRARED FLAME DETECTOR WITHOUT ORIFICE PLATE PILOT HOT REFRACTORY WITH ORIFICE PLATE MAIN FLAME PILOT HOT REFRACTORY MAIN FLAME M3050A Fig. 3. Using orifice plate to restrict detector field of view to intersection of pilot and main flame, or to small area of hot refractory.
PAGE 7
C7915A INFRARED FLAME DETECTOR CLEARANCE Make sure there will be enough room to easily mount the sight pipe, flame detector, and all required accessories, and to remove the flame detector for troubleshooting and servicing. C7915A SIGHTING TOWARD SIDE WALL INSTALLING THE SIGHT PIPE INTERSECTION OF PILOT AND MAIN FLAME The location of the sight pipe is the most critical part of the installation. A 3/4 in. black iron sight pipe is recommended.
PAGE 8
C7915A INFRARED FLAME DETECTOR SWIVEL MOUNT To facilitate flame sighting, a Swivel Mount (part no. 118367A) is available. The Swivel Mount requires a reducer of the proper size to mount it onto the sight pipe. (For mounting details, refer to form 60-0361 for the 118367A Swivel Mount.) Mount the C7915A Detector onto the sight pipe, heat block, or other accessory (Fig. 1 and 9). Screw the mounting collar onto the sight pipe or accessory.
PAGE 9
C7915A INFRARED FLAME DETECTOR 3. 4. 5. 6. The detector comes with 30, 48, or 96 in. (0.76, 1.22, or 2.44 m) coaxial cable inside a flexible metal cable. The coaxial cable is terminated with two leads—one blue and one white. The coaxial cable is rated for 194°F (90°C). The cable protects and electrically shields the coaxial cables. If the coaxial cables are not long enough to reach the terminal strip or wiring subbase, make the required splices in a junction box (see IMPORTANT below).
PAGE 10
C7915A INFRARED FLAME DETECTOR ADJUSTMENTS AND CHECKOUT IMPORTANT: Before welding the sight pipe in its final location, complete the Adjustments and Checkout Tests below and any tests required by the burner manufacturer. ADJUST DETECTOR SIGHTING POSITION Measure the flame signal for the pilot alone, the main burner flame alone, and both together (unless monitoring only the pilot flame when using an intermittent pilot, or only the main burner flame when using direct spark ignition).
PAGE 11
C7915A INFRARED FLAME DETECTOR HOT REFRACTORY HOLD-IN TEST Test to make certain that hot refractory will not cause the flame to remain after the burner flame is extinguished. This condition would delay response to flame failure and also would prevent a system restart as long as the infrared radiation emitted by the hot refractory is detected. First check the plug-in flame signal amplifier by initiating a burner cycle.
PAGE 12
C7915A INFRARED FLAME DETECTOR TROUBLESHOOTING PROCEDURES First perform the Preliminary Inspection. Then follow the applicable procedures for either a low reading or a zero reading on the flame signal meter. After reinstalling the detector, recheck the meter reading. Adjust the position of the detector to try to obtain the proper flame signal. If the procedures are completed and a satisfactory flame signal cannot be obtained, replace the detector. PRELIMINARY INSPECTION 1. 2. 3. 4.