Fireye 45UV5-1000 Manual



Thisbulletinisdirectedtothelicensedboilerservicetechniciansandprofessionalcombustion

engineers who are experienced in the installation and operation of Fireye flame safeguard

controls.PersonsnotexperiencedwithFireyeflamesafetyproductsshouldcontactthenearest

Fireye representative, or a qualified service group for assistance. IMPROPER INSTALLA-

TION OF THESE PRODUCTS MAY BE HAZARDOUS TO LIFE AND PROPERTY.

DESCRIPTION

Fireye Type 45UV5 scanners are self-checking, flame sensing devices. When powered by a compat-

ible, self-checking Fireye control, the scanners detect the presence or absence of flames which emit

ultraviolet radiation (UV). Typical fossil fuels which emit UV include natural gas, propane, meth-

ane, butane, kerosene, light petroleum distillates and diesel fuels. For burners firing steam-atomized

oil or pulverized coal, Fireye recommends the use of infrared (IR) scanners. Fireye offers a complete

line of infrared scanners best suited for these applications.

APPLICATION

When used with a Fireye amplifier, the 45UV5 scanner provides flame failure protection on single

and multi-burner industrial applications such as electric utility boilers, power boilers and large fur-

naces or incinerators. The 45UV5 scanner monitors the flame(s) of only one burner. The pilot and

main flames may be monitored individually (2 scanners) or in combination (1 scanner). When prop-

erly sighted, the scanner should discriminate between the burner being monitored and all other burn-

ers and any background flames.

Note: Scanner response is dependent on burner configuration as well as the turbulence and spectral

characteristics of the flames. Application assistance is available on request.

CU-22

MARCH 28, 2013

45UV5 SCANNER

MODELS:

1000, 1010,

1101, 1103

(including EX and CEX Models)

APPROVED



PRINCIPLES OF OPERATION

The 45UV5 scanner employs a detector which is a sealed, gas filled, ultraviolet-transmitting special

glass envelope containing two electrodes connected to an AC voltage source. The detector responds

only to a portion of the ultraviolet spectrum from common flames.

When ultraviolet radiation of sufficient energy (at wavelengths shorter than those in sunlight at the

earth’s surface) falls upon the electrodes, electrons are released and the inter-electrode gas becomes

conductive. This results in an electric current flow from one electrode to the other.

The current flow in the detector starts and ends abruptly and is known as an “avalanche.” A very

intense source of UV radiation will produce several thousand avalanches or pulses per second. Less

radiation will produce fewer pulses per second. Upon total loss of flame, the detector output ceases

except for very infrequent single pulses caused by cosmic rays. The circuitry does not respond to

these infrequent pulses. Thus, the presence or absence of pulses is an indication of the presence or

absence of flame; the frequency of the pulses is a measure of flame intensity. Pulses generated by the

scanner are transmitted to a compatible Fireye control via scanner wiring.

FEATURES

The UV tube, quartz lens, power transformer and related electronic components are contained in an

aluminum enclosure which is sealed with high temperature oil-resistant gaskets. The quartz lens is a

planoconvex type which increases the scanner’s sensitivity up to 400 percent. A hinged mount is pro-

vided to permit easy access for cleaning the lens. A double screw-and-keyhole slot arrangement per-

mits quick removal of the housing from its mount. The scanner has a 1" fitting for mounting to a

threaded sight pipe and a 3/8" threaded connection for purge air.

Also included in the Type 45UV5 scanner is an electromagnetic shutter that permits a self-checking

circuit within an associated Fireye control to verify that the scanner and signal circuits are producing

valid flame presence or absence information. During the shutter closed period the detector’s optical

path is blocked from flame radiation. While the shutter is open, flame presence or absence is

detected. The resultant scanner output, while flame is detected, is a continuous, periodically inter-

rupted pulsed flame signal. This is a prerequisite for energizing the associated Fireye control’s flame

relay.

FIGURE 1. 45UV5 SCANNER DIMENSIONS

2 3/16 (56)

8 1/2 (216)

2 13/16

(72)

45

LENS

CLEARANCE FOR

CLEANING LENS

6 3/16 (158)

1 7/16

(36.5)

1/2 - 14 NPSM

FOR ELECTRICAL FITTING

4 (102)

1 11/

Material: ALUMINUM

HOUSING MAY BE ROTATED

AT HINGE POSITION IN 90

INCREMENTS

1-11 1/2 NPT

OR 1" BSP

SIGHT PIPE

CONNECTION

DIMENSIONS IN INCHES (MM)

2 13/32

3/8 -18 NPT

PURGE AIR CONNECTION

or 3/8 - 19 BSP

(61)

(43)

CLEARANCE

REQUIRED

REMOVE

(51)

P/N 45UV5-1000, 45UV5-1103

(Includes p/n 61-2841-1 NPT Hinged Mounting Flange).

P/N 45UV5-1101, 45UV5-1010

(Includes p/n 61-2841-2 BSP Hinged Mounting Flange)

Hinged

Mounting Flange

(included)



SPECIFICATIONS

Mounting

Models are provided with 1" female thread mounting, either US NPT or British Whitworth according

to model (see table below).

Housing, Including Mounting Flange

Material: Die Cast Aluminum

Design: Hinged Mounting Flange, with air fitting to be permanently installed,

carries two 1/4 - 20 screws which may be loosened for quick removal of

the scanner housing, such as for lens cleaning.

Weight: 3.75 lbs. (1.7kg)

Electrical

Power Requirement: 4 VA AC from associated Fireye control (see note below).

Frequency: Frequency of scanner must match frequency of Fireye control and power

line supply (See Table 1).

Connection: 1/2 inch 14 NPSM tapping.

Temperature Range: Maximumoperating: 200F (93C)

Minimum operating: -40F (-40C)

Optical Range: 190 to 250 nanometers. No response to infrared radiation or visible

light.

Purge Air

Source: Clean ambient

Volume Required: 4 SCFM (113 L/min. @ 4" water column above furnace pressure

minimum) at 3/8 inch threaded housing inlet or 4 SCFM at 1 inch wye

fitting in scanner sight pipe. Temperatures near the upper limit of the

scanner operating range and/or use with dirty fuels may require up to

15 SCFM (425 L/min.).

Table 1:

Specifications subject to change without notice.

IMPORTANT NOTE: The AC power source must be sinusoidal for proper scanner operation.

The application of any waveform other than a sine wave (e.g. square wave) will damage the

45UV5 scanner.

MODEL

45UV5

FREQUENCY

MOUNTING

THREADS

FM DIN APAVE

1000 60 NPT ✓✓

1010 60 BSP ✓

1101 50 BSP ✓✓

1103 50 NPT



Optional Mounting Configurations for Hazardous Areas

FIGURE 2. 45UV5 SCANNER IN NEC/NEMA HAZARDOUS AREA HOUSING

FIGURE 3. 45UV5 SCANNER IN ATEX HAZARDOUS AREA HOUSING

INSTALLATION

1. The best scanner sighting results are obtained when the scanner is aimed so that the scanner

(viewing) center line intersects the burner center line at a slight angle, as shown in Figure 4. The

area of maximum ultraviolet radiation is near the base of the flame envelope. If only one scanner

is used per burner, the intersection should be made so the line of sight or viewing angle can also

see the igniter flame. Consideration must be given to burner air rotation (burners have clockwise

or counterclockwise air rotation). Figure 5 illustrates how scanner location is influenced by the

igniter position and air circulation. Physical obstructions such as air register blades should not

fall within the scanner’s line of sight.

17 1/4

8.25 (210)

FIREYE FLAME SCANNER

16 3/16

(412.79)

± 3/64 (1.2)

(439.88)

7 3/4

(196.85)

1" NPT

NIPPLE

1 1/4" PLUG

1 1/4" NPT CONDUIT

ENTRY

P/N 45UV5-1000EX (Includes Model

45UV5-1000 Scanner)

P/N 45UV5-1101EX (Includes Model

45UV5-1101 Scanner)

Housing Rating:

Class I, Div. 1& 2 Groups C,D

Class II, Div. 1, Groups E, F, G

Class III

NEMA 3, 4, 7 CD, 9 EFG

Weight: Approx. 18 lb. (8.2 kg.)

(NOT FURNISHED)

P/N 45UV5-1000CEX (Includes Model

45UV5-1000 Scanner and p/n 35-128

NPT Mounting Flange).

P/N 45UV5-1101CEX (Includes Model

45UV5-1101 Scanner and p/n 35-130

BSP Mounting Flange).

Housing Rating:

Exd II C T 6

IP 66

Weight: Approx. 7.6 lb. (3.5 kg.)

DIMENSIONS IN INCHES (MM)

4.02

(102)

4.41

(112)

MOUNTING FLANGE

8.10 (206)

3/4" NPT THREADED

OPENING FOR

COMPRESSION-STYLE

CABLE GLAND

(NOT FURNISHED)

3/8" NPT

THREADED

OPENING FOR

COOLING AIR

1" THREADED

OPENING

3.56

(90)

(INCLUDED)



FIGURE 4. SINGLE BURNER SCANNER SIGHTING

FIGURE 5. SCANNER LOCATION VS. SECONDARY AIR ROTATION

2. An acceptable scanner location must ensure the following:

— Reliable igniter flame detection.

— Reliable main flame detection.

— Rejection of igniter flame too short or in the wrong position to ignite the main flame reli-

ably.

Note: Reliable signals must be obtained at all air flows, furnace loads (ranges of fuel firing) and

desirable fuel air ratios.

3. If combustion air enters the furnace with a rotational movement of sufficient velocity to deflect

igniter flame in the direction of rotation, position the scanner 0 to 30 degrees downstream of the

igniter and near the periphery of the throat where the ultraviolet radiation is at a maximum. (see

figures 4 and 5).

4. Having determined an approximate location for the sight tube, cut a clearance hole for a 2 inch

pipe through the burner plate. If register vanes interfere with the desired line-of-sight, the inter-

fering vane(s) should be trimmed to assure an unobstructed viewing path at all firing levels.

5. Mount scanner sight pipe by either:

— Centering a swivel mount, P/N 60-1664-3 (NPT) or 60-1664-4 (BSP) over the hole and

installing the sight pipe on the swivel mount, or

— Inserting the end of the sight pipe into the hole, aligning the pipe to the desired viewing

angle and tack welding. Welding must be adequate to temporarily support the weight of the

installed scanner. The sight pipe should be arranged to slant downward so that dirt and dust

will not collect in it.

6. When a satisfactory sighting position has been confirmed by an operating test, (see section on

alignment), the sight pipe should either be firmly welded in place or, if the swivel mount is used,

the ball position should be secured by tightening the three hex head cap screws located on the

swivel mount ring. In certain older style swivel mounts, tack welding may be required.

PRIMARY

COMBUSTION

ZONE

AIR REGISTER

BLADES

SCANNER

LINE OF

SIGHT

BURNER

THROAT

FLAME

ENVELOPE

BURNER

CENTER LINE

BASE

IGNITOR

SCANNER

MAIN BURNER

CCW ROTATION

IGNITOR

SCANNER

MAIN

CW ROTATION

BURNER



FIGURE 6. FLAME MUST COMPLETELY COVER SIGHT OPENING

7. The scanner viewing window must be kept free of contaminants (oil, ash, soot, dirt) and the scan-

ner temperature must not exceed the maximum rating. Both requirements will be satisfied by con-

tinuous injection of air at either the 3/8" housing inlet or at a 1" wye ahead of the swivel mount, as

shown in Figures 7, 8, and 9.

Purge air may be supplied through the 3/8" or 1" wye connection. Normally only one of the two

connections is provided with purge air and the other connection is plugged. When a Fireye sealing

coupling is used as shown in Figure 7, the 1" wye connection is used for the purge air (plug 3/8"

opening).

Under normal conditions, with clean burning fuels and moderate ambient temperature conditions,

purge air flow of approximately 4 SCFM (113 L/min.) @ 4" water column above furnace pressure

is generally adequate. Up to 15 SCFM (425 L/min.) may be required for fuels that may produce

high levels of flash or soot or for hot environments to maintain scanner internal temperature within

specification.

8. The scanner sight pipe should be as large as is practical. Ideally, the sight pipe should increase one

inch in diameter (ID) for every foot in length. Under most circumstances, a sight pipe diameter

increase of one inch should be adequate for an increase in length of three feet (1m). When apply-

ing the scanner to long sight tubes (more than three feet), minimize the use of one inch pipe. Avoid

using pipe less than one inch (ID), and avoid using stainless steel sight pipes.

9. Temperature in the scanner housing should not exceed 200F.

10. Where separate scanners are used to monitor main and igniter flames, the main flame scanner

should be sighted to not detect the igniter flame. If it does detect the igniter flame, re-aim the main

flame scanner.

PIPING ARRANGEMENTS

FIGURE 7.

BUT THISNOT THIS NOT THIS

PART NUMBER

A. SWIVEL MOUNT 60-1664-3 (NPT)

60-1664-4 (BSP)

B. 1” WYE 35-200 (NPT)

C. & E. 1” CLOSE

NIPPLES 35-201

D. SEALING COUPLING W/QUARTZ WINDOW

60-1199-1 (NPT)

60-1199-2 (BSP)

F. 3/8” PLUG 35-202

20" (500) MAX*

CEF

ABD

Note: Scanner shown is not model 45UV5



PIPING ARRANGEMENTS

FIGURE 8.

FIGURE 9.

ALIGNMENT AND ADJUSTMENTS

Before installing or adjusting scanners, thoroughly plan the scanning objectives in reference to the

boiler/furnace mode of operation.

The following procedures are recommended to ensure optimum flame detection and discrimination.

Flame discrimination is the ability to see the flame of only one burner or one igniter with other burn-

ers or igniters operating nearby.

These procedures should be used whenever parts are replaced, when the scanner has been moved,

when the flame shape is altered (additional fuels, new burners, burner/register modifications) as well

as on all new installations. Signal readings referred to in this procedure are as displayed on a 0-3

VDC Fireye flame signal meter. (P/N 38-54, 38-55, 38-56). 1, 2

1 If using analog bargraph meter (P/N 38-88), the flame will be properly sighted when there are 5-8 LEDs illuminated.

2 When used with the 25SU3-2000 series amplifiers and appropriate power supply, the required flame signal strength(in terms

of “pulses-per-second,” will be determined by the “Flame-On” and “Flame-Off” thresholds programmed into the amplifier.

Refer to bulletin CU-34 for additional information.

PART NUMBER

A. SWIVEL MOUNT 60-1664-3 (NPT)

60-1664-4 (BSP)

B. 1” WYE 35-200 (NPT)

35-239 (BSP)

C. HEAT INSULATING

NIPPLE 36-127-1 (NPT)

35-127-3 (BSP)

D. 3/8” PLUG 35-202

ABC

18 3/4" (475) MAX*

PART NUMBER

A. SWIVEL MOUNT 60-1664-3 (NPT)

60-1664-4 (BSP)

B. HEAT INSULATING

NIPPLE 35-127-1 (NPT)

35-127-3 (BSP)

C. 3/8” THREADED OPENING

13" (330) MAX*



Igniter Flame Scanner

1. Apply power to scanner and associated control.

2. Start Igniter.

3. Adjust scanner sighting to detect igniter flame in the manner shown in Figure 4.

4. When flame is properly sighted and the control sensitivity properly adjusted (see Caution below)

the signal meter should register between 4 and 16. If readings fluctuate widely, readjust scanner

sighting until highest steadiest reading is obtained.

5. When the proper signal reading has been obtained, make sure that the scanner and the associated

control do not respond to the ignition spark. This is accomplished by cutting off the fuel to the

igniter and attempting to start the igniter using the spark igniter. If the system responds to the

spark, the sighting should be realigned.

CAUTION: Do not increase sensitivity any more than necessary to provide proper detection

of the minimum igniter flame. Minimum igniter flame is the minimum flame required to

ignite the main burner reliably. Be sure to test for reliable signals under maximum air flow

conditions when the igniter flame may be deflected outside the line of sight. If this occurs,

resighting is required.

Main Flame Scanner

1. Apply power to scanner and control.

2. Start igniter.

3. Adjust scanner sighting so that ignition spark and igniter flame are not detected. Test should be

conducted with maximum igniter flame and with both minimum and maximum air flow.

Note: This step may not be practical with Class 1 igniters, but may be desirable with Class 3.

4. Start main burner.

5. Adjust scanner sighting to detect main burner flame. When sighting is correct (see Figure 6), the

signal should read between 4 and 32 on a Flame Signal Meter, Fireye P/N 38-54 or 38-55, with-

out extreme fluctuations in the signal reading.

6. When proper signal is established, manually close off the main burner fuel supply. When burner

flame becomes unstable or is extinguished, the associated Fireye control should register a “No

Flame” condition.

7. Start an adjacent burner and vary its firing rate under normal air flow conditions. Make certain

that the main flame scanner on the burner not in service does not respond to the adjacent burner.

SCANNER SENSITIVITY ADJUSTMENT

Excessive scanner flame signal can affect flame discrimination and prevent the associated 25SU3 or

25SU5 control from operating properly. Weak signals may cause unnecessary burner shutdown or

alarms. The sensitivity of the 45UV5 scanner can be adjusted by one of two methods determined by

the Engineering Code of the scanner.



METHOD 1: 45UV5 SCANNERS WITH ENGINEERING CODE 00-03 (built through mid- 2008)

Sensitivity is adjusted by changing the position of the p/n 4-320-1 UV tube in its socket (Figure 10).

FIGURE 10. 45UV5 -ENGINEERING CODE 00-03 UV TUBE POSITION

Note: To change UV Tube position, pull tube out of eight pin (octal) socket, rotate to desired position, and then insert.

The tube has four different positions. When the electrodes are almost perpendicular to the Terminal

Board and approximately parallel to the shutter slot, the detector tube will generate maximum signal.

This is the “MAX" position shown in Figure 10. When the electrodes are 90from the "MAX" posi-

tion, minimum signal will be generated. The intermediate positions, “A and B” will yield intermedi-

ate signals. Position “A” will yield a slightly higher signal than position “B” since more electrode

will be exposed to the radiation entering the shutter slot. To adjust the signal further, use the appro-

priate sensitivity adjustment in the 25SU3 or 25SU5 control. Refer to the control bulletin for further

information. The detector is shipped in the "MAX" signal position.

If the tube position is changed in the field, and the scanner is later replaced, verify that the signal

strength is not excessive.

METHOD 2: 45UV5 SCANNERS WITH ENGINEERING CODE 04 AND HIGHER (built after mid-2008)

The sensitivity is adjusted by changing the position of the orifice plate in front of the p/n 4-290-2 or

4-314-1 UV tube. See Figure 11.

FIGURE 11. 45UV5 -ENGINEERING CODE 04 or HIGHER ORIFICE PLATE POSITION

Sensitivity adjustment - loosen but do not remove the two adjustment plate retaining nuts. Pull orifice plate back

toward retaining nuts to detach from locating pins. Slide the orifice plate up toward the shutter coil for more sensitivity

or down from the shutter coil for less sensitivity. Position the plate onto locating pins to lock in place. Tighten the

adjustment plate retaining nuts.

SCANNER WITH COVER REMOVED TO

REPLACE TUBE OR CHANGE SLOT

POSITION OF 4-320-1 TUBE

()

ELECTRODES

TERMINAL BOARD

UV TUBE

SHUTTER

SLOT

RECTANGULAR

MAX

Sensitivity adjustment

plate with orifices

Adjustment plate

retaining nuts (2)

UV tube

retaining

clip

UV tube,

4-290-2 or

4-314-1



FIGURE 12. RECOMMENDED SPARE PARTS

FIGURE 13. ACCESSORIES

FIGURE 14. ACCESSORIES

ACCESSORIES

Swivel Mount

The scanner swivel mount (P/N 60-1664-3, -4) is used to adjust the scanner sighting angle after the

scanner has been installed. The swivel mount is used as indicated in Figures 7 and 8.

Orifices

The orifice is used to restrict field of view (target area), reduce air flow, maintain air block, and

increase discrimination between flame and background radiation. The orifice is secured within the

ball of a swivel mount with an orifice retainer or the orifice can be placed within a 1 inch union (not

provided).

CD EFG

CDEF G

A. Tube (see note)

B. Shutter & Bracket 61-2914-1

C. Shutter Bracket & lens (see note)

D. Gasket 29-248

E. Lens Holder 82-95

F. Lens Retainer 16-103

G. Lens Assembly (see note)

Note: Refer to MAINTENANCE section for detailed list of part numbers.

A-I. Orifices: 0.062" - 0.5" DIA

J. Orifice Retainer 34-181

K. Heat Insulating Nipple 35-127-1 (NPT)

Heat Insulating Nipple 35-127-3 (BSP)

L. Quartz Scanner Lens (see note above)

M. Sealing Quartz Window 92-48

N. Diode 101-78 A B C D E F G H I

A. Swivel Mount 60-1664-3 (NPT)

Swivel Mount 60-1664-4 (BSP)

B. Sealing Coupling with Quartz Window

60-1199-1 (NPT)

60-1199-2 (BSP)

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