Overview of Primary Product

ManualsBrandsFireye ManualsHeating SuppliesNon-Self Check MB-Series Ultra-Violet Scanner with 1/2" NPT Mount

FLAME RODS

Flame rods should be used only on gas burners. They accu-

mulate soot on oil burners, causing nuisance shutdowns and

unsafe operating conditions. See the burner manufacturer’s

literature for flame rod mounting location. When installing

flame rods, please consider the following:

1.Keep the flame rod as short as possible and at least 13

mm (1/2") away from any refractory.

2.Position the rod into the side of both the pilot and main

flames, preferably at a descending angle to minimize

drooping of the flame rod against burner parts, as shown at

left. Flame rod position must adequately detect the pilot

flame at all burner draft conditions. Extend the rod 13 mm

(1/2") into nonluminous flames, such as blue flames from

burning an air/gas mixture. For partially luminous flames,

such as atmospheric air/gas mixtures, place the rod at the

edge of the flame.

3. Provide a burner/flame grounding area that is at least four times greater than the flame rod area

contacting the flame. The flame rod/burner ground ratio and position of the rod in the flame may

need adjustment to yield maximum flame signal strength.

4. Ignition interference from the spark plug may increase or decrease the flame signal strength.

Reversing the ignition transformer primary leads may reverse this effect. Reducing the spark

gap or adding grounding area between the flame rod and spark plug may eliminate the interfer-

ence.

SCANNERS

Use only Fireye scanner models UV7A4, UV7R4 &

UV7SC. Consult the burner manufacturer’s instruc-

tions for mounting location. When installing scanners,

please consider the following:

1.Position the scanner within 457 mm (18") of the

flame.

2.Bushing threads are 1/2 inch F.N.P.T. for scanner

models UV7A4 and UV7R4; model UV7SC has 1 inch

F.N.P.T. bushing threads.

3.The ambient temperature limits of each scanner var-

ies; check the literature supplied with the scanner. For

higher temperatures, use Fireye heat insulator part

number 35-319. If necessary, also use a purge tee.

4.An optional magnifying lens (Fireye P/N 46-185)

may also be used to increase the flame signal strength

in difficult sighting situations.

FLAME ROD

WRONG

Rod Detects

Weak Pilot

CORRECT

Rod Detects

Only Strong

Pilot Flame

90° UV SCANNER

(MODEL UV7R4)

SELF-CHECK UV SCANNER

(MODEL UV7SC)

UV SCANNER

(MODEL UV7A4)