Honeywell S702, S702HF, S702PF, S702HFPF, S706 User Manual

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Honeywell Model 700/800 Signal

Contents

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

Features ........................................................................... 1

Specifications ................................................................... 3

Approvals ......................................................................... 3

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

Operation ......................................................................... 11

Modbus Communication .................................................. 16

Troubleshooting ................................................................ 19

Maintenance .................................................................... 19

Safety Manual: 700 Signal Processor .............................. 35

Safety Manual: 70X & 80X Viewing Head ........................ 38

Processor and Viewing Head

USER MANUAL

The two Model 700 signal processors are similar, with 12 push-buttons, a two-digit numeric display, and four LED status indicators for operator interface. The only difference between the two is that one accepts AC power and the other accepts DC power. Both models also accept 24VDC backup power. Most of the signal processor connections are made through Phoenix plug-in connectors. Communication connections are made through modular phone jacks located at the top of the signal processors (Fig. 7).

Both signal processor models mount on a standard 35 mm DIN rail. They snap into place and may be released from the rail using a flat screwdriver.

There are two types of viewing heads—IR/flicker-sensitive and UV-sensitive—with various features offered resulting in ten different models. See Table 1 on page 2 for details.

The S702 and S706 viewing head housings are larger in diameter than the S80X series, are made of aluminum, and are secured with over-center latches to their mounting blocks (Fig. 8). In contrast, the S802 and S806 viewing head housings are smaller in diameter and are made of stainless steel (Fig. 9). An 800 series viewing head is secured in its mounting block by a friction twist-lock.

APPLICATION

The Honeywell Model 700ACSP and Model 700DCSP signal processors are single-channel, fail safe, flame monitoring systems when used In conjunction with the S70X/S80X viewing heads. They offer easy setup, excellent discrimination, and high reliability.

FEATURES

Viewing heads are interchangeable between the two signal processor models. Any viewing head in the two families will work with any of the signal processors.

Two signal processor models are available:

• Model 700ACSP Universal 85-265 VAC powered

• Model 700DCSP 22-26VDC powered

The IR/flicker sensitive viewing heads have a high-pass filter that passes flicker frequencies above 33 Hz. Some models have a built-in high pass filter that only passes frequencies above 155 Hz. The high frequency filter models are identified by adding “HF” to the model number. The UV models respond to the absolute level of UV radiation—not UV flicker—so there is no filter option.

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HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

The standard electrical connector supplied with both the 700 and 800 viewing head models has two indicator LEDs inside it: the green LED indicates signal pulses (helpful in alignment), and the orange LED indicates self-check activity between the signal processor and the viewing head (Fig. 4). The green LED also flashes once per second when the orange LED is pulsed as the viewing head sends an ID code back to the signal processor.

Model 700 viewing heads are also available with a 1/2 in. pipe fitting for connecting to electrical conduits. The four connecting wires exit through an epoxy seal in the 1/2 in. pipe fitting. The LED indicators are not present in the pipe-fitting option. The pipe fitting models are identified by adding "PF" to the model number.

The available models are shown in Table 1.

Table 1. Available viewing head models and associated features.

High

Frequency

Filter 155Hz

Aluminum

Housing

Stainless Steel

Housing

Model Connector

Pipe Fit Connection ½ in

NPTM with 10-ft (3.0m)

pigtail

UVTron Sensor IR Sensor

S702 X X X

S702HF X X X X

S702PF X X X

S702HFPF X X X X

S706 X X X

S706PF X X X

S706PF-050* X X X

S802 X X X

S802HF X X X X

S806 X X X

*S706PF-050 has a 50-ft (15 m) pigtail

All models include the following:

1. Electronic check (no mechanical shutter) for self-check of the system.

2. All IR viewing heads respond to flicker frequencies above 33Hz, with exception of the HF versions, which only respond to flicker frequencies above 155 Hz.

The viewing heads, the viewing head connector, and the cable provided are watertight, and have NEMA 4 and 4X ratings when the connector is properly tightened with pliers and the cable is protected from UV exposure.

The availability of both UV-sensing and IR/flicker-sensing viewing heads ensures that the flame monitoring systems can provide good discrimination in virtually any application. UV sensing is appropriate for monitoring natural gas, some mixed gases and light oil flames. IR/ flicker sensing is appropriate for monitoring heavy oil and coal flames.

66-2069—01 2

SPECIFICATIONS

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

Series 700 and 800 Viewing Heads

MODELS S702, S702PF, S702HF, S702HFPF, S706, S706PF, AND MODELS S802, S802HF, AND S806

Electrical

Input Power: 22VDC to 26VDC, 150 mA MAX from Model

700ACSP or 700DCSP Signal Processor

Environmental

Viewing Head Sealing: NEMA TYPE 4/4X rated when the

molded connector ring is tightened with pliers and a UV protection is provided for the cable by installing in conduit.

Ambient Temperature: -40°F to 185°F (-40°C to 85°C)

IR Detector Spec

S702, S702PF, S702HF, S702HFPF, S802, S802HF:

Germanium photodiode with spectral response 950nm to 1710nm (1/2 intensity points) and peak spectral response at 1400nm

High Pass Filter Pickup: 33 Hz standard, 155 Hz high

frequency option (-HF)

IR Optical

Angle of View: 1 degree (1.45” dia. at 6 ft. or 3.7cm dia. at

1.8m)

UV Detector Spec

S706 & S706PF, S806: UVtron with spectral response 185nm

to 260nm and a peak response at 210nm

UV Optical

Angle of View: 5 degrees (1 inch per foot)

Cable & Connector

Signal Proc. to V.H.:

(Standard) Honeywell C330, 4 Conductor, 18 ga., shielded, 90C, Sunlight Resistant, 15 ft. long, with ITC rating for US and CIC rating for Canada. (This rating permits use in hazardous locations without a conduit.)

With PF option Honeywell C330 cable or 4 conductor, 22 ga. or larger with overall braided shield, 95% coverage, or with shield over the signal line may be used for extension purposes. Tie shield to ground at viewhead end and signal processor end of cable. (Cable must be protected by a conduit in hazardous locations.)

Dimensions

Refer to Fig. 8 and Fig. 9.

Model 700ACSP & Model 700DCSP Signal Processer

Electrical: Model 700ACSP

Primary Input Power: 85-265VAC, 50-60 HZ, 0.07A Max.

fused (with either V.H. connected)

Battery Backup Voltage: 22VDC to 26VDC, 0.2A DC Max.

fused (with either V.H. connected)

Electrical: Model 700DCSP

Primary Input Power: 22VDC to 26VDC, 250 mA Max. fused

(with either V.H. connected)

Battery Backup Voltage: 22VDC to 26VDC, 0.5A DC Max.,

fused (with either V.H. connected)

Outputs

Flame Relay: 2 form C contacts Self-Checking Relay: 1 form C contact Relay Contact Ratings: 5A at 125 VAC, 277 VAC, & 30 VDC;

1/8 HP 125 & 250 VAC

Analog Flame Signal: Isolated 0 to 20 mA or 4 to 20 mA

output for remote meters or DCS, 360 ohms maximum resistance

Environmental

Ambient Temperature: 32°F to 140°F (0°C to 60°C)

Dimensions

Refer to Fig. 10 and Fig. 11.

APPROVALS

S70X/S80X Viewing Heads (Connector series and Pipe fit series [PF])

CSA for CLASS I, DIV 2, GROUPS A, B, C, D & T4A FM 7610/NEMA 4X and CLASS 1, DIV 2, GROUPS A, B, C, D

& T4A* SIL 3 “Fit for Use” IECEx CSA 10.0003 Ex nA IIC T4 Gc

-40<Ta<85ºC, -40<TA<185ºF

*IP67/NEMA 4/4X rating applies when connector ring is

properly tightened and cable is UV shielded

700ACSP and 700DCSP Signal Processors

CSA (C, US) FM

INSTALLATION

When Installing These Products...

1. Read these instructions carefully. Failure to follow them

could damage the products or cause a hazardous condition.

2. Check the ratings given in the instructions and one the products to make sure the products are suitable for your application.

3. Installer must be a trained, experienced, flame safeguard control technician.

4. After installation is complete, check out product operation as provided in these instructions.

Signal Processor Mounting

The 700ACSP and 700DCSP signal processors mount on a standard 35mm DIN rail. They snap into place and may be released from the rail using a flat screwdriver.

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HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

Grounding and Shielding

NOTE: Installer must be a trained, experienced flame

safeguard service technician and should be familiar with the equipment operation and limitations and be aware of any applicable local codes and regulations.

1. Connect a safety ground to the viewing head housing (if

applicable).

2. The viewing head and all associated cable/conduit must be at least 12 inches (31 cm) from any source of high energy or voltage (for example, igniter equipment).

3. Install a ground wire from the ignition transformer case to the igniter assembly.

4. Ensure all igniter wires and cables show no signs of wear. Replace any igniter cables or wires that are frayed or cracked.

5. The viewing head must be electrically isolated from the burner front. a. Electrical isolation can be accomplished by

installing an Ultem nipple (R-518-13) or an Ultem locking coupler adapter (R-518-PT13 or R-518PT13L) in conjunction with a locking coupler (R-518CL13-HTG) between the viewing head flange and the burner mount.

b. The purge air line should also be isolated from the

viewing head. This can be accomplished by installing any insulating material, for example a rubber hose, in between the purge air line and the viewing head.

Signal Processor Power Connections

The Model 700ACSP power and relay connections are shown in Fig. 1. The AC power supply to the 700ACSP Signal Processor passes through a 2A fuse and an inrush current limiter.

The Model 700DCSP power and relay connections are shown in Fig. 2. The maximum current rating for each 700DCSP is 250mA.

In the Model 700 signal processors the flame relay (RF A/B ON, OFF, COM) has two sets of FORM C (SPDT) contacts and the self-check relay (SC ON, OFF, COM) has one set (Fig. 1 and Fig. 2). The self-check relay is energized whenever the signal processor is powered and is operating normally, whether the flame relay is energized or not. Internally, the flame relay is wired in series with the self-check relay (not shown), which prevents the flame relay from energizing if the self-check relay is not energized.

Unique fail-safe circuitry for the self-check and flame relays ensure that in the event of any critical component failure occurrence, system response will be to de-energize the selfcheck relay, which in turn de-energizes the flame relay.

Some of the internal power wiring of the Model 700ACSP and Model 700DCSP signal processors is shown in Fig. 1 and Fig. 2. Rectifier diodes separate the battery backup input from the main power bus until the battery voltage exceeds the internal DC voltage plus a diode voltage drop. Resettable fuses (shown as resistors with slashes) and conventional fuses prevent internal failures from loading the power sources. With the Model 700DCSP, if a backup battery is to be used with a main power supply, the two power sources would be wired as shown in Fig. 2. If no backup battery is to be installed, the main power supply can be connected at +26V PWR and GND as shown in Fig. 2 or it can be connected to the +24V BATT input and GND. It is preferable to use the battery connections because it takes advantage of the resettable fuse at the battery input; resettable fuses recover automatically from a fault within a few seconds after power is removed. At the +26V PWR input and its associated GND, conventional1A fuses are used because they are able to protect against 240VAC being applied by accident (this could happen if a Model 700DCSP is installed in a cabinet wired for a Model 700ACSP).

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HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

APPROVED

AC IN

GROUND

TO VIEWING HEAD

24 V BACKUP BATTERY (OPTIONAL)

0-20 OR 4-20 MA

FOR INDICATOR OR

INSTRUMENTATION 360 OHMS MAX

CHASSIS, EARTH, OR SYSTEM GND

M34280

+26VDC

GND

.125 A

.4A

AC POWER

SUPPLY

-t°

Fig. 1. Model 700ACSP Signal Processor Wiring.

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HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

+26VDC

GND

.4A1A 1A

.125 A

LIM

M34282

APPROVED

24 V BACKUP BATTERY (OPTIONAL)

0-20 OR 4-20 MA

FOR INDICATOR OR

INSTRUMENTATION

360 OHMS MAX

CHASSIS, EARTH, OR SYSTEM GND

DC POWER SUPPLY

250 MA

+26

PWR

TO VIEWING HEAD

Fig. 2. Model 700DCSP Signal Processor Wiring.

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HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

RED

BLACK

WHITE

GREEN

TERMINAL

VH SIG

VH SC

VH +V

VH GND

CONDUIT

ENCLOSURE

S702PF, S702HFPF OR S706PF

SHIELD

GRAY CABLE WITH OVERALL SHIELD

STANDARD "PIGTAIL" LENGTH = 10 FEET (3 METERS)

M34285A

Viewing Head Connector and Wiring

Viewing heads are wired to the appropriate terminals located on bottom of the 700ACSP, 700DCSP, P531 or P532 signal processors. The terminals are listed functionally in Table 2.

Table 2. Terminal Descriptions.

700ACSP or

700DCSP

Ter minal

P531 or

P532

Terminal

VH SIG VH3 SIG Flame Signal from Viewing Head

VH SC VH3 SC Shutter Drive Signal to Viewing

Head

VH +V VH3 +V +24VDC Power to Viewing Head

VH GND VH3 GND GND Signal Ground

Connectors and cables are shown in Fig. 3, Fig. 4, and Fig. 5. Fig. 3 shows the viewing head cable with the 1/2 in. NPT pipe fitting and pigtail for use in a conduit. The gray cable is labeled: LAPP USA UNITRONIC 190CY B (UL) TYPE CMG 105C 22AWG/4C SHIELDED E130334 – CSA CMG 105C or AWM II A/B 300V LL74246. The standard pigtail length is 10 feet (3.0m). The S706PF-050 has a 50-ft (15 m) pigtail length. This cable must be used with a conduit in hazardous locations. It can also be ordered commercially as Olflex 602204S.

The recommended cable for hazardous locations, C330, is shown in Fig. 4 with the right-angle connector and Fig. 5. It is supplied as standard in a 15 ft. (4.6m) length with other available lengths. This cable does not have to be used in a conduit. It is labeled: C-330E193849 (UL) TYPE ITC 4/C 18

Description

AWG 90C 300V OR c(U L) CIC 90C 600 V FT4 SU NLIG HT RESISTANT. C330 cable with or without the connector wired

at the factory can be purchased from Honeywell. Refer to “Accessories” on page 10 for part numbers.

The customer may also supply his own cable; a replacement mating viewing head connector should be ordered. Refer to “Accessories” on page 10 for part numbers. The use of shielded cable is recommended, either an overall shield or a cable with a shield for the signal line. The shield should be connected to GND at the processor end and to the ground wire at the viewing head end. The cable diameter should not exceed 0.307" in order for it to go through the hex bushing in the connector. But note that wiring the cable to the connector is not easy because of the limited space. Also, the LED indicator assembly must be mounted inside the connector and, preferably, soldered in place. Thus, it is recommended to purchase a pre-wired cable and connector assembly from Honeywell.

NOTE: FOR CLASS I, DIV 2 RATING, CABLING IN

HAZARDOUS LOCATIONS MUST COMPLY WITH NEC ARTICLE 500 REQUIREMENTS AND APPLICABLE GOVERNING CODES.

In the U.S., cables should have UL’s ITC rating; in Canada, cables should have CSA’s CIC rating. The recommended C330 cable has both ratings.

NOTE: To obtain a NEMA 4X seal between the connector

and the viewing head, tighten the metal connector ring securely.

Fig. 3. Model 700 Viewing Head Cable With 1/2 in. NPT Fitting.

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HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

VH SC

700 LTA

T&B #5330 LIQUID TIGHT FITTING

FLEXIBLE LIQUID TIGHT CONDUIT, SUCH AS ElectriFlex LT-516

5-16 (8) MAX

Fig. 4. Model 700/800 Viewing Head Cable Connections.

Cable Preparation

NOTE: This section will typically be used for reference

Honeywell C330 cable is recommended for use with the S70X/S80X viewing heads and signal processors. C330 cable has a UL ITC rating and can be used in the US in hazardous locations. Note the flame signal wire is shielded, and that the shield must be terminated at both ends.

NOTES:

Connection of the Honeywell type C330 cable to the viewing head plug is shown in Fig. 5. Cable preparation should be done as follows:

• Remove the cable entry nut from the plug housing.

• Remove the retainer and rubber grommet.

• Unscrew the plug end from the connector body.

only. The S70X/S80X connector parts are very small and delicate and difficult to assemble. It is advisable to purchase pre-made cables from Honeywell.

— The shield is used as the signal ground wire

which goes to terminal SIG GND on the signal processor. The shield must be braided type for this application in order to maintain an electrical path. For this reason, a foil type shield should not be used. The signal ground shield is also the selfchecking or shutter drive circuit return path. It is recommended that the Honeywell C330 cable be used for all S70X/S80X applications.

— Shield shrink tubing is required on the SIG GND

wire at both ends.

VH SIG

VIEWING HEAD CONNECTOR LOOKING AT PINS

C330 LIGHT BLUE CABLE WITH SHIELDED WHITE CONDUCTOR (RATED ITC BY UL & CIC BY CSA)

VH +V

VH GND/SHIELD

METAL CONNECTOR RING

GREEN

LED

SHIELD

WHITE

BLACK

RED

GREEN

VIEWING HEAD CONNECTOR LOOK ING AT BACK

TERMINAL

ORANGE LED

VH SIG

VH SC

VH +V

VH GND

M34286

2. Slide the shield back until a bulge develops close to where the wire exits the cable outer covering.

3. Carefully spread a few strands of the shield at the bulge (making sure not to break any strands) to create an opening and pull the wire out of shield through opening.

4. Carefully return shield to original shape and length by pulling gently, then cover the shield with heat shrink tubing to insulate it.

5. Slide the nut (with threads toward the cable end), the retainer and the grommet onto the cable.

6. Slip the cable through the bottom opening of the connector through the 90-degree bend and out the plug end of the connector body.

7. Strip each wire 3/8” as shown in the assembly drawing.

8. Proceed to wire the connector as follows:

a. Connect the viewing head signal wire (the shielded

wire) WHT into the designated terminal by inserting into opening and then tightening the retaining screw.

b. Connect the self-checking signal wire BLK to its

designated terminal.

c. Connect the signal ground shield from WHT wire

with shrink tubing to its designated terminal.

d. Connect the +24VDC power wire RED to its

designated terminal.

e. Connect the power ground wire GRN to the proper

terminal.

9. Carefully slide the wired plug end into the connector body. Screw the plug onto the connector body until tight.

10. Reassemble the grommet, retainer and cable entry nut and tighten to the connector body.

1. Strip 2 inches of the C330 cable outer cover from the cable removing any cellophane wrap or filler material. Strip the insulation from the shielded wire (if insulated over shield) a full 2 inches to expose the shield.

66-2069—01 8

Cable at the signal processor end should be prepared in a similar way to the plug end, particularly the shield from the WHT wire. Follow the wiring connections as shown in Fig. 5, making sure that the shield does not touch the other adjacent terminals.

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

3 CONDUCTORS PLUS 1 COAX 3 CONDUCTORS: 18 AWG COLOR WHITE: 38 AWG BRAIDED SHIELD 90% COVERAGE JACKET: TPE (TPAF) LIGHT BLUE

GROMMET

FLAT WASHER OR RETAINER

CABLE ENTRY NUT

CABLE

CABLE PREPARATION

STRIP 3/8" TYPICAL

1-19/64 (33)

NOTE: IMPORTANT INSULATE SHIELD WITH SHRINK TUBING LEAVING 3/8" STICKING OUT.

TYPICAL

Fig. 5. C330 Cable Preparation.

Protecting the Viewing Head Cable (Connector Series)

It is usually desirable to mechanically protect the cable going to the viewing head. For the connector model viewing heads, flexible conduit and adapters can be used for this purpose. See Fig. 4. The 700LTA (liquid tight viewing head cable adapter) is a custom part available from Honeywell; it screws into the right-angle connector in place of the standard hex bushing. The 700LTA is used with a Thomas and Betts #5330 liquid tight fitting which is designed to give a watertight seal for flexible Liquatite

conduit, such as part number LT-516 by Electri-Flex. The components have internal dimensions to clear a 5/16 in. diameter cable. For each viewing head a 700LTA, a flexible conduit, and two T&B fittings will be needed. Honeywell sells the 700LTA while the other parts can be purchased commercially. The installer can fit the liquid tight flexible conduit over the cable supplied with the viewing head by first unscrewing the hex bushing from the connector and removing it from the cable and then sliding the 700LTA, T&B and flexible conduit assembly over the cable and screwing the assembly into the right-angle connector. The flexible conduit is terminated with the second T&B fitting which ends with a 3/8 in. NPT thread.

Note that when the wiring needs to meet Class I, Division 2 requirements for use in hazardous locations and when conduit is used, the conduit must be sealed where the cable passes from the hazardous location to the non-hazardous location in order to keep potentially hazardous gases from being conducted into the non-hazardous area.

Viewing Head Connector LED Indicators

The viewing head connector has orange and green LEDs which can be viewed from the rear of the connector.

The green LED displays the pulses out of the viewing head and the orange LED shows that the self-checking signal from the signal processor is reaching the viewing head. If power is

on at the signal processor, the orange LED should flash at one pulse per second, even if the viewing head is not plugged in. This is helpful in troubleshooting.

With no flame signal present, the green LED will flash one pulse per second in step with the self-checking signal. The viewing head is sending back an ID pulse; this is part of the self-checking system. When a flame is present, the green LED will flash at a rate proportional to the flame signal, except when the pulses are interrupted once per second for the selfcheck pulse arrival at the viewing head. The pulse rate of the green LED flashes can be used for aiming the viewing head.

Viewing Head Mounting and Sighting

Mounting is 1/2-in. NPT (F) for all viewing head models with a 1/4-in. NPT (F) purge air connection. Before beginning the actual installation, determine the best location for mounting the viewing head based upon the following factors:

Viewing Head Mounting Block

The S70X viewing heads are held firmly in place in their mounting blocks by two galvanized steel latches. The S80X viewing head is secured in its mounting block by a friction twist-lock. The mounting blocks are made from a hard Delrin rated for continuous service to 180°F (82°C). An alternative mounting block made from Ultem and S80X viewing heads, rated for continuous service up to 320°F (160°C). Refer to the ACCESSORIES section for part numbers.

Pressure

The S70X viewing head lens will withstand 50 psi (3.4 bar) while the S80X lens will withstand 90 psi (6.2 bar), provided the compression ring on the purge air adapter is tightened properly. If the lens assembly is exposed to greater pressures through the sight pipe, then an isolation unit must be used. Honeywell isolation units with purge air entrance are available

SHIELD

M33282

1000 is available for S70X

9 66-2069—01

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

as accessories; ISO-UNIT, ISO-UNITSS, ISO-UNITHPGT. Each has a quartz window, two 1-in. NPTF connections and a 1/2-in. NPTF purge port.

Temperature

The case temperature of the viewing head housing must not exceed 185°F (85°C) while the standard Delrin mounting block must not exceed 180°F (82°C) continuous service. Care should be taken to ensure the case housing and mounting block temperatures do not exceed these values.

Purge air will help reduce conducted heat through the sight pipe and flange. A heat insulating Ultem replacement viewing head mounting block is available for both the S70X/S80X models (part numbers 700UA and 800UA) with a continuous service rating of 320°F (160°C) as well a 1/2-in. NPTM Ultem nipple (part number R-518-13) or an Ultem locking coupler adapter (R-518-PT13 or R-518-PT13L) to reduce the conducted heat, but direct radiation can cause the housing case temperature to exceed limits. If the ambient heat (direct radiation) is excessive, then an air cooling canister with vortex cooler should be considered or alternately a fiber optic extension. The extension uses a fiber optic cable assembly between the sight pipe and the viewing head, allowing the viewing head to be placed further away from the heat source. Refer to the Fiber Optic Manual 69-2683 or contact your distributor or the factory for assistance with fiber optic selection and pricing.

as possible so as to sight along the flame rather than across the flame. Doing so will ensure continuous flame detection under changing load conditions. See Fig. 14, 15 and 16.

Utilizing a sighting or the sight pipe aimed at the root of the flame (where the turbulent combustion air mixes with the flame) is a good starting point for optimizing the sighting. Where practical, using a swivel mount to "zero-in" on the highest signal will assure maximum performance. The optimum scanner location is parallel to the burner center line. The use of a swivel mount allows for line of sight adjustment, where practical to use.

Examples of viewing head installation with and without a swivel mount are shown in Fig. 12 and Fig. 13. If using a sight pipe, its diameter should be large enough to allow a reasonable field of view, and to allow for adjustment of the swivel mount angle.

In some instances, it may be beneficial to use two sets of setpoints for Flame On, Flame Off and gain. The two-channel capability (primary and alternate viewing head settings) is ONLY possible when using the P531 or P532 signal processors; it is not possible when using the 700ACSP or 700DCSP signal processors. The switch-over from Channel A to Channel B can be implemented from the burner control system. Refer to the P531/P532 user manual, 66-2068, for further information regarding switch-over and the use of Channels A and B with independent settings.

Purge Air

Use a flexible air supply line, to allow for repositioning of the viewing head and sight pipe until a final and permanent position has been decided. A continuous flow of air must be maintained in order to reduce the conducted heat and to keep the sight pipe and viewing head lens free of dirt and debris. Air required is about 5 SCFM (0.13 Nm3 /min) delivered at 1 in. (25mm) above the maximum pressure as measured at the "Y" or "T" section of the purge air connection for each viewing head. The air supply must be clean, free of oils and water, and preferably cool. In order to electrically isolate the viewing head, the purge air line should be installed using an insulating material, such as a rubber hose, in between the purge air line and the viewing head.

Vibration

Do not install the viewing head where it could be subject to high vibration. Provide an anti-vibration mount if excessive vibrations are present.

Clearance

Make sure there will be sufficient room to remove the viewing head housing for servicing.

Viewing Head Mounting

Honeywell offers a range of swivel mounts, both pipe thread or flange mounting for use with sight pipes or direct windbox mounting. See “Accessories” on page 10 or the Honeywell website for further details.

Viewing Head Sighting

The sighting of the viewing head should be parallel to the center line of the burner in the direction of the flame. If used, the sight pipe should be mounted as close to the center line

ACCESSORIES

Orifice disks (kit M-702-6) - Used to reduce the signal

brightness in cases where the signal brightness is too strong. Located immediately in front of the lens, it will reduce the amount of signal to the sensor. Bag assembly contains orifice disks and retaining rings. Orifice disks come with 3/8, 1/4, 3/16 and 1/8 inch diameter holes. Contact the factory for guidance in using orifice disks.

Insulating nipple (R-518-13) - 1/2-in. NPTM Ultem heat and electrical insulating nipple typically used in conjunction with a swivel mount and union.

VH insulating mounting block (700UA, 800UA) - 1/2 in. NPTF Ultem heat and electrical insulating mounting block, used in place of the supplied Delrin mounting block. 1/4 in. NPTF purge air connection. Typically used in conjunction with a swivel mount. Rated for continuous service up to 320°F (160°C).

Swivel mounts, small (700-1, 700-2, 700-3) - All have 1/2 in. NPTM viewing head connections on one end with varying process connections including 1 in. NPTF, 1/2 in. NPTF and 1/2 in. flanged.

Swivel mounts, large (M-701-1, M-701-2, M-701-2-FLG, M701-2-SS, M-701-3, M-701-3P, M-701-4) - All have 1 in NPTF

viewing head connections, one end with varying process connections including 2 in. pipe slip on, 2 in. NPTF, 2 in. flanged, 2 in. NPTF in stainless steel construction, 4.5 in. flanged with 3 bolts, 3 in. NPTF and 2-bolt flanged. Appropriate fittings must be used to adapt the 1/2 in. NPTF viewing head process connections.

66-2069—01 10

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

Insulating locking coupler adapters (R-518-PT13, R-518PT13L) - 1/2 in. NPTM Ultem adapters insulate the viewing

head electrically and thermally and are used with the R-518CL13-HTG locking couplers. The R-518-PT13L has a quartz lens.

Locking coupler (R-518-CL13-HTG) - Used with the R-518PT13 and R-518-PT13L insulating locking coupler adapters. Process connection end is 1/2 in. NPTF.

Connector (ASY784) - Replacement quick disconnect connector for all S70X/S80X models.

Connector + Cable (ASY782) - Replacement pre-assembled 15-foot (4.7m), 4-conductor cable (C330) with quick disconnect (ASY784) for all S70X/S80X non-pipe fitting models. There are also five more pre-assembled cable and connector assemblies available; ASY782-030 (30ft/9m), ASY782-050 (50ft/15m), ASY782-100 (100ft/30m), ASY782200 (200ft/61m) and ASY782-250 (250ft/76m).

Cable (C330) - 4 conductor cable with braided shield. Sold per foot.

Isolation Units (ISO-UNIT, ISO-UNITSS, ISO-UNITHPGT) - All have 1 in. NPTF connections with 1/2 in. NPTF purge ports and quartz window. Painted aluminum or stainless steel construction. The HPGT version has a 1/2 in. thick quartz window for higher pressures. Appropriate fittings must be used to adapt the 1/2 in. NPTF viewing head process connections.

Liquid tight cable adapter (700LTA) - S70X/S80X viewing head cable adapter with 3/8 in. NPTF conduit connection.

Air cooling canister (700ACC, 800ACC) - Has an air inlet port on side. Used with vortex coolers. S80X models can be used with the 700ACC if the 800ACC-RING adapter is used.

Vortex coolers (M3204, M3208, M3210, M4025) - Used with air cooling canister. Contact your distributor or the factory for selection assistance.

Cable restraints (800CR, 700CRLT) - Liquid tight S80X and S70X cable restraint versions. The 800CR includes the 700CRLT and the 800ACC-RING adapter.

S80X adapter ring (800ACC-RING) - Adapter ring to fit S80X viewing heads to 700ACC cooling jacket and 700CRLT liquid tight cable restraint.

Right angle adapter (700RAA) - S70X/S80X viewing head right angle adapter. 1/2 in. NPTF to 1/2 in. NPTM connections.

Mounting blocks (700DA, 700DA-1, 800DA) - Delrin replacement adapter/mounting blocks for S70X and S80X viewing heads. All have 1/4 in. NPTF purge air connections. Rated for continuous service up to 180F (82C). The 700DA and 800DA have 1/2 in. NPTF process connections while the 700DA-1 has a 1 in. NPTF process connection. For more 1 in. NPT accessories that can be used with the 700DA-1, refer to the S55XB/BE manual, 66-2064.

USB to RS422/RS485 Converter (COMMOD) - Protocol converter for use with external communication with a remote computer.

Fiber Optic System Compatibility - The S70X and S80X viewing heads are compatible with the Honeywell FASA fiber optic extension products. The S700FOAD and S800FOAD

adapters are applicable, depending on the application. Contact your distributor or the factory for assistance with fiber optic selection and pricing.

OPERATION

IR Detector

The S702 and S802 viewing head models use a Germanium photodiode, which responds to IR radiation/flicker in the flame. Flame flicker is caused by the combustion, or forced air injected in to the flame. Combustion air can be mixed with the fuel (pulverized coal) or can be introduced separately. In either case, forced air is introduced in such a way as to aid the combustion process. This air is usually made turbulent by causing it to swirl with spin vanes located in the burner throat. Flame flicker is created when turbulent air mixes with the flame. It is composed of random frequencies and the amount of high frequency flicker is dependent on the fuel and the burner.

The S702, S702PF and S802 viewing head models respond to flicker frequencies above 33Hz while the S702HF, S702HFPF and S802HF viewing heads respond to flicker frequencies above 155Hz. All flicker frequencies below the filters are ignored, so it is important to sight the viewing head on the highly turbulent portion of the flame that contains the higher frequencies. The location of the higher frequencies can be predicted by examining the burner with regard to where the turbulent air enters the flame. The optimum scanner location is parallel to the burner center line (Fig. 14). The use of a swivel mount is encouraged to allow for line of sight.

Filter Selection for IR Viewing Head

If a good count ratio between BNR-ON and BNR-OFF cannot be obtained when using an IR viewing head—particularly when monitoring oil flames—an IR viewing head with the High Frequency (HF) filter option is recommended. The standard IR viewing head responds to flicker frequencies above 33 Hz; with the HF option, the IR viewing head responds to flicker frequencies above155 Hz.

UV Detector

The S706, S706PF and S806 viewing head models use the UVTron tube, with a spectral response of 185-260nm and peak response of 210nm to ultraviolet radiation. The output of the detector is a pulse stream of randomly spaced pulses whose average rate is proportional to the UV radiation present in the flame. The UV radiation is a direct result of the combustion process as oxygen combines with hydrocarbons in the fuel in the blue part of the flame. The yellow part of flames, and the background radiation from hot refractory, do not emit UV radiation.

The spectral range of the UV tube makes it ideal for discriminating between flame and glowing refractory. As with any UV radiation, it can be absorbed or masked by unburned fuel, smoke, oil mist, dirt dust and other impurities in the fuel. Care should be taken to select the proper viewing head for the fuel used. Additionally, the contaminants that mask UV can be diluted by providing a strong flow of air through the sight pipe to clear a viewing path through the attenuating material. See “Purge Air” on page 10.

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HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

It may also be desirable to sight the detector at an area containing fewer masking agents such as near the burner nozzle or near the entrance of the combustion air. Increasing the viewing area of the detector by shortening the sight pipe or by increasing the diameter of the sight pipe can also reduce the attenuating effects of the masking agents.

In general, the UV viewing heads will work well on natural gas and light oil flames. The sighting for both oil and gas flames should be parallel to the axis of the burner and aimed at the root of the flame, as with the IR detector. (See previous section, "IR Detector.") The highest UV intensity occurs near the root of the flame (Fig. 15). In addition, the zone of higher UV intensity does not overlap the same zones of adjacent or opposing burner so that, with proper sighting, discrimination can be achieved.

With low NOx gas burners, the UV radiation is usually much less in intensity and spread out. Relatively high readings can be obtained from all over the furnace when many burners are in service. This is particularly true when flue gas recirculation is used. There will however, be a relatively stronger signal near the "root" of the flame and the more intense spot should be located during the aiming or sighting process. This "root" or intense spot may be further out than with the standard gas burner so it is imperative that a swivel mount be used when making sighting adjustments.

Another factor that needs to be considered when aiming the viewing head is the load condition of the boiler. The flames from a burner can be radically different at different loads. This is one of the reasons for choosing an optimum sighting initially that will minimize signal swing due to changing loads.

Self-Checking

There is a small processor in both the IR and UV viewing heads, so it is possible that this processor could fail and produce erroneous viewing-head pulses. The self-check circuitry guards against this. There are several tasks that require intelligent interaction between the viewing heads and the signal processor. If all of these interactions do not occur properly, the viewing head will not send pulses back to the signal processor and the flame relay will open.

Verifying the validity of the gain code received is one of the tasks performed by the processor in the IR and in the UV viewing heads. The self-check pulse from the signal processors is a 100ms-wide, 20V to 24V pulse with two “notches” or breaks in it. The position of each of the two notches communicates a gain code of one to nine plus parity to the viewing head. The viewing head sends back an ID pulse in the first half of the 100ms self- check time. A viewing head expects to receive data with a certain parity. If a viewing head does not receive its correct parity plus the gain code once per second, it produces no output pulses.

There is also intelligent interaction between the older S706 viewing heads, which did not have the gain-change feature from the signal processor. The processor in the S706 viewing head monitors the 100ms width of the self-check pulse coming from the signal processor. If the pulse is not the correct width the viewing head produces no output pulses. Also, if the signal processor receives any pulses back from the viewing head during the last half of the100ms self-check time, it assumes that a processor failure has occurred in the viewing head, opens both relays, and displays “LO” (lockout).

Adjustment of VH Sighting and Gain

NOTE: Adjustment to the viewing head parameters

cannot be made unless the viewing head is connected and communicating with the signal processor.

The viewing head should be properly sighted before the setpoints are adjusted. Adjustment can be made easier by a 1/2 in. swivel joint, which Honeywell can supply if one is not available (refer to “Accessories” on page 10).

While the burner is firing, vary the viewing angle while observing the green LED on the connector at the rear of the viewing head. Adjust the viewing angle for the maximum pulse rate, then lock the swivel joint to preserve this mechanical setting. If the green LED pulse rate is very high or very low, see the two paragraphs below. The locked mechanical setting should still be correct when Model 700 viewing heads are interchanged, because inside each Model 700 viewing head the optical axis is aligned with the mechanical axis within ±1/4 degree. Also, the reading shouldn’t change when a viewing head is rotated in the mount.

For the above sighting adjustments to work properly, the flashing rate of the green LED in the connector at the rear of the viewing head must be reasonable. On the -PF (pipe fitting) version, there are no LEDs. The installer must observe the flame signal on the signal processor instead.

A count rate of 16 to 20 is recommended for proper operation. If the displayed count is above 25, the pulses begin to blur together, making changes in the pulse rate difficult to observe. If the count is higher (29 or 30), then the viewing head is saturated. Saturation indicates that the count could be even higher, possibly 50 or more, but it is internally clamped. With count rates at or close to saturation, the installer will not be able to adjust the viewing head in the swivel mount to maximize the count rate properly. It should be possible to sufficiently decrease the count rate to a usable level by decreasing the gain. See “Manual Setup of Setpoints” on page 13 of this manual. If the gain is set to 1 and the count is still 25 or higher, orificing is likely required. See the section on orificing below.

If the displayed count is less than 8 or 10, it will be difficult to maximize the count by adjusting the viewing head aim, since the pulses occur too infrequently. In such a case the gain should be increased. If the gain is set to a maximum and the count rate persists below 8 or 10, the system can still be made to work reliably as long as the count rate drops significantly when the flame is removed. However, the setup should be reviewed for proper viewing head aim and sight path to ensure it is optimized.

Orificing

Orifice disks have been used in applications with older viewing heads that did not have adjustable gain in order to reduce the extreme brightness of certain burner flames. The orifice disk kit is part number M-702-6. Orifice disks come with 3/8, 1/4, 3/ 16 and 1/8 inch diameter holes. Contact the factory for guidance is using orifice disks. The disks are installed with retaining rings in the flange at the edge of the 1/2 inch NPT female pipe thread for the process connection. An internal type retaining ring is first installed by positioning a ring in the machined groove inside the flange opening from the housing

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side. The orifice disk is then inserted. Use a second retaining ring to hold it in place so that it is sandwiched tightly between the two retaining rings.

If the displayed flame count is 25 or higher when the gain is set to 1, an orificing disc inserted in the back end of the mounting block can be used. Choose a disc that gives a reading of 12 to 24 at a low fire firing rate. The discs have a range of orifice sizes; each size step results in about a 2:1 change in the counts displayed.

Signal Processor User Interface

The 700ACSP and 700DCSP signal processors have a user interface that includes four lights, a two-digit display and twelve push buttons for operation and programming. Each button has at least one specific purpose.

To enter a menu, press and hold the applicable button for 2 seconds. Adjustments to the applicable setpoint can be made via the INCREASE or DECREASE arrow buttons. To store the new setting, press the STORE button until “--“ is shown, indicating the value has been accepted.

If no activity occurs for a period of four seconds while the menu value is displayed, it will revert back to the operating display.

To exit a menu at any time without saving changes, simply press the RESET/rE button.

The following describes the functions of the LED indicators, display and push buttons:

Front Panel LED Indicators and Display

• ON SEQ/AUTO SET LED (green):

— Used in conjunction with the BNR-ON SEQ START/

END and BNR-OFF SEQ START/END buttons during the automatic setup process

• OFF SEQ/FAULT LED (green):

— Used in conjunction with the BNR-ON SEQ START/

END and BNR-OFF SEQ START/END buttons during the automatic setup process

— Indicates a fault condition

• Two digit display

— When in operating mode, the display indicates the

current flame signal, which ranges between 00 and 29

— Upon power up, indicates whether an IR or UV viewing

head is attached and the selected gain setting; such as r7 (IR with gain of 7) or u5 (UV with gain of 5).

— Indicates various characters during the automatic

setup process as well as whether the panel is locked

• FLAME SIG LED (yellow):

— When a flame is present, LED flashes at a rate

proportional to flame signal, except when the pulses are interrupted once per second for viewing head selfchecks.

• FLAME ON LED (red):

— When the flame signal is above the selected value, the

LED will be illuminated and the flame relay will be energized.

Push Button Functions

• RELAY ON SETPOINT button:

— Allows user to select flame on threshold value. When

the flame signal is above the selected value, the flame relay will be energized. Used in conjunction with the INCREASE, DECREASE and STORE buttons (range of 00 to 29).

• LOAD FACTORY DEFAULTS button:

— Used to restore all settings to the factory default

values

•

↑ INCREASE button:

— Used to increase parameter value when in

programming mode

• RATIO (%) RELAY OFF/RELAY ON button:

— Used along with the INCREASE, DECREASE and

STORE buttons to set the RELAY OFF setpoint at a percentage of the RELAY ON setpoint. Adjustable from 20% to 80%.

• STORE button:

— Stores new parameter values during programming — After making changes “--” will be displayed indicating

the new values are accepted and stored

•

↓ DECREASE button:

— Used to decrease parameter value when in

programming mode

• BNR-ON SEQ START/END button:

— Used to initiate and proceed through the automatic

parameter setup sequence, which includes the RELAY ON, RATIO (%) and GAIN settings (the FFRT, mA output and communication address must be set manually)

• BNR-OFF SEQ START/END button:

— Used during the automatic parameter setup sequence

• ACCEPT RATIO/SET GAIN button:

— Allows user to set the viewing head gain in conjunction

with the INCREASE, DECREASE and STORE buttons

— Used in conjunction with the BNR-ON SEQ START/

END and BNR-OFF SEQ START/END buttons during the automatic setup process

• FFRT 1/2/3 SEC OPTION button:

— Used to set the FFRT timing along with the

INCREASE, DECREASE and STORE buttons

• 0-20MA 4-20MA OPTION button:

— Used in conjunction with the INCREASE, DECREASE

and STORE buttons to select the proportional mA output for the flame signal

• RESET rE button:

— Resets a lockout condition — Also used to exit a menu while programming — Used to set the Modbus address along with the

INCREASE, DECREASE and STORE buttons

Manual Setup of Setpoints

The keypad of the signal processor is used to set the IR/UV GAIN, RELAY ON, RATIO % (Relay Off), FFRT and mA output option setpoints. The following section describes this process. Also refer to Fig. 21, 22, 23, 24 and 25.

Setting the Viewing Head Gain

The gain of the IR and UV viewing heads can be adjusted. In addition to the information in this section, refer to Fig. 25. At power-up, the 700 signal processors display codes to tell the operator what type of viewing head and what gain is being used. Default values are “r5” for the IR viewing head and “u5”

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HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

for the UV viewing head. The “r” or “u” denote IR or UV viewing heads, respectively, while the numeric digit indicates the current gain setting. The gain can be adjusted from 1 to 9 with a gain of 5 being the factory default gain.

To change the gain, press and hold the SET GAIN button for two seconds until the current value is displayed. Use the INCREASE and DECREASE buttons to change the setting as appropriate while the value is displayed. To store the new setting, press the STORE button until "--" is shown, indicating the value has been accepted.

If no activity occurs for a period of four seconds while the value is displayed, the display will return to the operation mode without saving the new setpoint.

To exit the menu at any time without saving changes, simply press the RESET/rE button.

The gain is live; changes are effective immediately, but if the displayed gain value is not stored (by pressing STORE), and no other buttons are pressed, the processor returns to the previous setting after four seconds.

The gain steps have a ratio of 1:1.19, meaning they increase 19% with every step (multiply by 1.19). Going from a gain of 1 to 5 or 5 to 9 doubles the gain whereas going from a gain of 9 to 5 or 5 to 1 halves the gain.

Relay On Setpoint

The two numeric digits on the Model 700 signal processor normally display the incoming count during operation; that is, the number of pulses that arrive between self-check pulses. This count ranges from 00 to 29.

Refer to Fig. 21 for a flowchart of setting the Relay On setpoint. Press and hold the RELAY ON SETPOINT key for two seconds to access this setpoint. The RELAY ON SET POINT value will be displayed. If no further keys are pressed, this display will disappear in four seconds and the incoming count will again be displayed. If the RESET key is pressed, the display will return immediately to displaying the incoming count.

While the RELAY ON SET POINT is displayed, you may increase or decrease the setting by using the INCREASE and DECREASE arrow keys. To store the new setting, press the STORE button until "--" is shown, indicating the value has been accepted.

To exit the menu at any time without saving changes, simply press the RESET/rE button or wait 4 seconds until the display reverts to the incoming count value. To extend the display time, press the RELAY ON SETPOINT button again; the display will time out for four seconds after the key is released if no other buttons are pressed.

The displayed value of the RELAY ON SET POINT is live; that is, if the relay is off and the adjusted value falls below the current flame signal count, the relay will turn on immediately (FFRT settings are ignored). This immediate response can be seen if the count is low and the RELAY ON SET POINT is set above it; if the RELAY ON SET POINT is then adjusted down to the count level, the FLAME ON relay will be energized.

Ratio (%) Relay Off/Relay On Setpoint

For a flowchart of this setpoint process, refer to Fig. 22. The key labeled RATIO (%) RELAY OFF/RELAY ON is used to set the RELAY OFF SET POINT at a percentage of the RELAY ON SET POINT. This percentage is adjustable from 20% to 80%. For example, if the RELAY ON SET POINT is set to 16 and the RATIO (%) is set to 50% (the factory default values) the relay will energize if the displayed count goes to 16 or higher and de-energize when the count drops to 08 or less for one to three seconds, depending on the FFRT (Flame Failure Response Time) setting. The adjustment of the RATIO setting is live. Adjustments will cause the Flame Relay to de-energize immediately, ignoring FFRT settings.

To access this setpoint, press and hold the ACCEPT RATIO/ SET GAIN button for 2 seconds until the current value is displayed. While the value is displayed, adjustments may be made via the INCREASE or DECREASE arrow buttons. To store the new setting, press the STORE button until "--" is shown, indicating the value has been accepted.

If no activity occurs for a period of four seconds while the value is displayed, the RATIO display will disappear and the old ratio setpoint will take effect.

To exit the menu at any time without saving changes, simply press the RESET/rE button.

Setting FFRT (Flame Failure Response Time)

To access the FFRT setpoint, press and hold the FFRT 1/2/3 SEC OPTION button for 2 seconds until the current value is displayed. Refer to Fig. 23 for the setup flowchart. The FFRT can be set at 1, 2 or 3 seconds. While the value is displayed, adjustments may be made via the INCREASE or DECREASE arrow buttons. To store the new setting, press the STORE button until "--" is shown, indicating the value has been accepted.

The FFRT changes are not live; they take effect only if the STORE button is pressed. FFRT values do not relate to the RELAY ON SETPOINT and RATIO (%)/RELAY OFF values. Therefore, during automatic setup, if the AUTO SET LED is on, confirmation is not needed to change the FFRT setting.

If no activity occurs for a period of four seconds while the value is displayed, the FFRT display will disappear and the old setpoint will take effect.

To exit the menu at any time without saving changes, simply press the RESET/rE button.

0/4-20mA Output Option

An analog output current is provided for operating a remote meter or other instrumentation. The load resistance should not exceed 360 Ohms for the Model 700 signal processors. The resistance can be chosen to give the desired voltage swing. For example, if 2V is desired for a 20 mA output, a 100 Ohm resistor would be used. Fig. 24 contains a flowchart for the mA output setup.

The analog current output selections are 0 to 20 milliamps, or from 4 to 20 milliamps. Selection of the applicable range is made by pressing and holding the 0-20 MA/4-20 MA OPTION button until the current value is shown. 02 denotes the 020mA selection while 42 denotes the 4-20mA selection (the

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HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

default value). While the value is displayed, it may be changed via the INCREASE or DECREASE arrow buttons. To store the new setting, press the STORE button until "--" is shown, indicating the value has been accepted.

Confirmation is not requested if the 0-20/4-20 setting is changed when AUTOSET LED is on

The 0/4-20mA output option is live; the operative range changes as soon as the displayed selection is changed. However, the value must still be saved via the STORE button in order to be saved in the signal processor's EEPROM.

To exit the menu at any time without saving changes, simply press the RESET/rE button or wait four seconds.

The analog current output is scaled according to the RELAY ON setting. It is scaled so that, if the counts coming in are at a count rate equal to the RELAY ON setting, the current output is approximately 13 MA when the range selected is 0-20 MA, and about 14.6 MA when the range selected is 4-20 MA.

Note that the actual maximum level for the current output is

19.8 MA.

Automatic Setup of Setpoints

With this feature, the Model 700 signal processors set the RELAY ON SET POINT, the RATIO % (Relay Off), and the UV/ IR GAIN automatically. Calculations for these settings are carried out in the signal processor as the operator takes the system through BURNER ON and BURNER OFF sequences. Fig. 18, 19 and 20 flowchart the automatic setup sequence.

The FFRT (flame failure response time) and the 0/4-20mA output option must be manually setup after the automatic setup process is complete. Refer to the Manual Setup of Setpoints section and Fig. 23 and 24. for details on setting these 2 parameters.

Before starting the automatic setup sequence, adjust the RELAY ON SET POINT to get the FLAME ON relay to energize.

Press BNR-ON SEQ START/END key for two seconds. If the FLAME ON relay is de-energized, the display will show “bo” (burner off); press RESET to clear this. If the FLAME ON relay is energized, the ON SEQ LED will start flashing slowly and the numeric display will start counting down from 59 while the processor takes data at one reading per second. The FLAME ON relay will remain energized if the flame is present, according to the current settings, until valid new values are obtained. To end the data sampling, press the same button, BNR-ON SEQ START/END, again, but ensure that an adequate number of data samples has been taken. At least 30 seconds of BNR-ON data sampling is recommended; ten seconds is a minimum. The software will not respond to a second press of the button for 10 seconds. RESET may also be pressed while the data sampling is occurring; the data sampling process will be aborted and the old values will remain in effect.

After BNR-ON data sampling is complete, the OFF SEQ LED flashes. Turn off the burner and immediately press the BNROFF SEQ START/END key (a two-second press is not required). The displayed timer then counts down from 29. This process may be interrupted, but at least 15 seconds of BNROFF data sampling is recommended. The data sampling

process can be aborted by pressing RESET, in which case the data for both BNR-ON and BNR-OFF will be discarded and the previous values will remain in effect.

If the data is good, that is, the computed ratio is 71% or less when BNR-OFF data sampling is complete, the display shows the ratio in percentage for one second, followed by “- -” to indicate a successful setup. The signal processor then turns on the AUTO SET LED to verify that the values stored internally were derived from the BNR-ON/BNR- OFF data sampling sequence.

If the data received is marginal, with the computed ratio ranging from 72% to 80%, the display alternates be- tween “AC” and the computed ratio, for example, “AC” and “75.” Press either the ACCEPT RATIO or RESET keys. If ACCEPT RATIO is pressed, the display responds with “- -”, the ratio is stored, and the AUTO SET LED is turned on. If RESET is pressed, the display returns to the counts, both of the AUTO SETUP LEDs are turned off, and the old setpoints are used.

If the ratio computed as a result of BNR-ON and BNR- OFF data sampling is higher than 80%, the display will show “UA” (unacceptable), alternating with the unacceptable ratio. For example, if the computed ratio is 93%, the display would alternate between “UA” and “93.” RESET must be pressed to clear this; the old values for RELAY ON and RATIO will remain in effect.

The values can be worse than just unacceptable. If the flame relay de-energizes while reading BNR-ON values, the display will show “bo,” and data-taking will be aborted. Other faults, such as a BNR-ON flame signal that is too low to use, or BNROFF readings that are too close to the BNR-ON readings, can result in “rE” being displayed. RESET should then be pressed.

The signal processor also adjusts the viewing head gain during the BNR-ON and BNR-OFF data sampling sequence. Normally, after the sequence, the display should read about 20, because the gain has been adjusted to give this reading. If it is less than about 18, you should find that the gain has been set to 9; if it is more than about 22, you should find that the gain has been set to 1.

Once the values have been stored through this sequence, you can check the RELAY ON SET POINT, the RATIO, or the GAIN by pressing the appropriate key for two seconds. However, if you attempt to change these values by pressing the INCREASE or DECREASE keys, the display will show “CF” (confirm), and the AUTO SET LED will flash rapidly. To confirm the desired change, press the RELAY ON SET-POINT key, the RATIO key, or the SET GAIN key a second time. To discontinue any changes, press the RESET key or simply wait four seconds for a time out to occur.

The user confirms they wish to make changes, the values will change when you use the INCREASE or DECREASE keys. Meanwhile, the AUTO SET LED will be flashing. The AUTO SET LED will de-energize only if the changed values are stored; if the changed values were not stored, the AUTO SET LED will light and the old values will remain in effect.

If values were obtained automatically, that is, if the AUTO SET LED is on and the BNR-ON SEQ START/END key is pressed, the display will also show “CF.” If the BNR-ON SEQ START/ END key is pressed again, the signal processor will begin the BNR-ON data sampling sequence.

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Loading Factory Defaults

Fig. 17 shows the flowchart for restoring default values. Pressing and holding the LOAD FACTORY DEFAULTS button will result in the values shown in Table 3 being loaded and stored in EEPROM. During the automatic setup sequence, if the AUTO SET LED is on when the LOAD FACTORY DEFAULTS key is pressed, “CF” will be displayed. Press the LOAD FACTORY DEFAULTS key again to confirm the change, or press RESET to abort the change. If the factory defaults are loaded, the AUTO SET LED will be turned off.

Table 3. S70X/S80X Default Settings

Relay on setpoint 16

Ratio (%) relay off/relay on 50%

FFRT (Flame Fail Response Time) 1 sec

0-20mA/4-20mA OPTION 4-20mA

UV/IR Gain 5

Communication address 0

Panel Lock

A pattern of key presses will result in the panel being locked so as to block any changes to the values stored in the signal processor. With the panel locked, values may be examined, but the signal processor will not respond to the STORE key.

The panel should be locked after the setpoints are set. Contact the factory to obtain the procedure to lock or unlock the panel.

Refer to Fig. 6 and Fig. 7 for a typical communication wiring and addressing scheme as well as the required wiring of the COMMOD communication converter.

The 700ACSP and 700DCSP signal processors have two modular phone jacks for RS-422 communications. The jacks are wired in parallel so that point-to-point cables can be jumped from unit to unit to interconnect multiple Model 700 signal processors. The RS-422 interface IC is a MAX489. The ICs can drive up to quantity 32, Model 700 signal processors on the same bus.

For communication with external controls or computers, refer to Table 4 for the Modbus registers map.

Communication Setting

700ACSP and 700DCSP can only communicate via Modbus RTU protocol, with the following configuration:

• 9600 baud

• 8 data bits

•no parity

• 1 stop bit

NOTE: Default protocol must be changed in order to use

Modbus communication. It may be set for Modbus by using key sequence below at the front panel of the 700 as follows:

1. Press and hold BNR-OFF SEQ START/END button for 2 seconds.

2. Press up arrow to change setting from P0 to P1.

3. Press STORE.

Working with Older UV Viewing Heads

When the signal processor has been set up with an older UV viewing head without communications, the settings may be viewed and changed whether or not the viewing head is connected. But, if the viewing head is changed from a new intelligent type to an older UV type without communications, the display panel will remain inoperative until pulses start coming in from the old UV viewing head. Then the signal processor will recognize the older UV viewing head, make the appropriate changes, and begin responding to the keys pressed on the front panel.

MODBUS COMMUNICATION

The 700ACSP and 700DCSP signal processors are capable of communication with Flametools software running on a Microsoft® Windows® PC, S7999D touch screen or other device that supports Modbus RTU protocol. Both Flametools and the S7999D include graphic user interfaces. Other devices will require the user to generate an interface. The data transmitted to and from the 700ACSP/700DCSP is over two twisted pairs that are differentially driven and received according to the RS-422 standard. Honeywell offers a RS485/ 422 to USB converter to use in conjunction with the 700ACSP/ 700DCSP signal processors. The Honeywell part number is COMMOD.

The factory default Modbus address of the 700ACSP and 700DCSP is 0 and must be changed to a number between 1 and 32 to establish communication between the signal processor and the host control. When more than one signal processor is in the network, ensure that each signal processor has a unique Modbus address within the range of 1 to 32.

Modbus RTU Function Supported

Four Modbus functions are supported:

• 01 Output coil read

• 03 Holding register read

• 06 Preset single holding register

• 16 Preset multiple holding register

NOTES:

— Before Model 700 signal processors are

connected to the RS-422 bus, their individual Modbus addresses must be set to differing values between 1 and 32.

— The RESET button on front of the 700ACSP or

700DCSP signal processors is used to set the Modbus address.

— Press and hold the RESET button for two

seconds and the current address will appear. It may be changed with the up or down arrow keys.

— Pressing the STORE button will store the new

address.

66-2069—01 16

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

Table 4. MODBUS registers map.

40001 FLAMECOUNT Flame count of active viewing head (read only) 0 3425

40002 PROCSTATUS Processor status bitmask (read only)

0255 bit 1: flame on relay status (1=relay energized, 0=off) bit 2: Processor Lockout status (0 =lockout, 1=not lockout) bit 3: Panel access disabled (1=disabled, 0=enabled) bit 4: 4 - 20 ma output (0=0 to 20, 1=4 to 20)

40003 FLAMEON Flame On setpoint (read/write) 3 (S70X) 29

40007 OUTPUTGAIN Gain of the 0/4-20mA output (read/write) 20 80

40010 IRGAIN IR sensor gain setting (read/write) 1 9

40012 UVTGAIN UV tube gain setting (read/write) 1 9

40017 TYPE Viewing head type bitmask (read only)

-bit 0: UV viewing head bit 1: IR viewing head

40021 TIMEDELAY Time Delay (read only)

=1 for 700XXSP

40022 FFRT Flame failure response time setting in seconds (read/write) 1 3

40023 VERSION Firmware version (read only) - -

40024 MODEL Model number (read only) - -

40084 ERRORCODE Error code (read/write)

-NOTE: writing a non zero number to this register is not allowed

40085 BAUD Baud rate setting (bits/second). Only affects RS-485

96 192 communication, not IRDA. (read, write) 96=9600 (default), 192=19200. The SP and the master device must have the same baud settings.

40086 PARITY Parity setting. Only affects RS-485 communication, not IRDA.

01 (read/write) 0= none (default), 1=odd

40087 ADDRESS Modbus address used by RS-485 and IRDA (read/write).

0247 Each device must have a unique address.

40089 PROTOCOL Protocol (read/write)

01 0=Honeywell protocol, 1=Modbus protocol

17 66-2069—01

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

USB TO RS422/485 CONVERTER

M33831

SIDE VIEW

BOTTOM VIEW

WIRE

SIDE

PRODUCT

SIDE

A TDA(–)

B TDB(+)

C RDA(–)

D RDB(+)

E GND

TDA(–)

TDB(+)

RDA(–)

RDB(+)

GND

NOTES:

SELECT THE APPROPRIATE DIP SWITCH SETTINGS FOR RS-422 COMMUNICATION PER THE VENDOR’S INSTRUCTION SHEET.

RJ11 CONNECTOR IS CUSTOMER SUPPLIED AND WIRED.

SOFTWARE DRIVERS MAY BE DOWNLOADED FROM B&B ELECTRONICS’ WEBSITE.

RJ11

MODULAR

CONNECTOR

COLOR TYPE A

WHI

BLK

RED

GRN

YEL

BLU

COLOR TYPE B

BLU

YEL

GRN

RED

BLK

WHI

CONVERTER CONNECTOR

RDA (-)

RDB (+)

TDA (-)

TDB (+)

GND

DESCRIPTION

FROM PROCESSOR

TO PROCESSOR

GROUND

CAUTION: THE ORDER OF THE COLORS IN THE CABLE CAN BE TYPE A OR TYPE B. CHECK COLORS AT THE CONNECTOR.

BOILER

ADDRESS

BNR 1

BNR 2

BNR 3

BNR 4

BNR 5

BNR 6

BNR 1

ADDRESS

NOTES: A CONVERTER MAY BE NECESSARY FOR COMMUNICATION WITH THE MODBUS MASTER CONTROL.

BOILER 3

USE SHIELDED CABLE FOR COMMUNICATION WIRING.

DRAWING IS FOR GENERAL REFERENCE ONLY.

FOR RS422 COMMUNICATION WITH THE 700ACSP OR 700DCSP, AN RJ11 CONNECTOR WITH 5 WIRES FROM EACH SIGNAL PROCESSOR WILL BE REQUIRED (RDA-, RDB+, TDA-, TDB+, GND), FOLLOWING POLARITY FROM EACH SIGNAL PROCESSOR.

BNR 2

MODBUS

MASTER CONTROL

Fig. 6. Typical Communication Wiring and Recommended Addressing.

NOTE: Refer to Fig. 7 for converter to RJ11 wiring details.

BNR 3

BNR 4

M34457

66-2069—01 18

Fig. 7. COMMOD Communication Converter Wiring.

TROUBLESHOOTING

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

Lockout or Faulty VH Indication

If the viewing head produces any pulses during the last one third of the self-check time, the relay will immediately deenergize, the display will show “LO” (lockout), and the FAULT LED will flash on and off rapidly. Exit lockout by pressing RESET.

If a pulse or pulses come in during the last one third of the self-check time while the automatic data sampling is taking place, the automatic process will be aborted, the relay will be de-energized if it was energized, the display will show “LO” (lockout), and the FAULT LED will flash on and off rapidly. Press RESET to exit this.

If a viewing head is disconnected, the display will show “L1.” Reconnect the viewing head and press RESET.

If the signal processor displays "EE" upon power up, it is an indication that the EEPROM stored data for the viewing head does not match for the currently connected viewing head. For further information on this condition, refer to the Parameter Match Error Section below.

Parameter Match Error

If the signal processor displays "EE" upon power up, it is an indication that the EEPROM stored data for the viewing head does not match for the currently connected viewing head. This error can occur when a different model viewing head is connected to the signal processor than was previously connected. As a result, the signal processor discards the previous stored parameters and loads factory defaults, except the RELAY ON SETPOINT is set to 31.

Setpoint values and other parameters plus error-checking codes are stored in EEPROM (Electrically Erasable Programmable Read Only Memory) in the signal processors. This data is then error-checked when it is read at power up. If the data does not match exactly what was previously stored, the signal processor discards all data, displays “EE”, and

loads factory defaults. The RELAY ON SETPOINT is set to 31. Since the flame count cannot go this high, the flame relay cannot be energized. The signal processor can be reset by changing the RELAY ON SETPOINT to a reasonable value or by pressing LOAD FACTORY DEFAULTS.

Panel Lock with No VH Connected

The signal processor requires continuous communication with the connected viewing head. If the viewing head is disconnected, communication will be lost and the display is made inoperative where no settings can be examined or changed. To correct this condition, reconnect the viewing head to the signal processor and cycle power.

Grounding and Shielding

See “Grounding and Shielding” on page 4 for further troubleshooting help in regards to proper grounding and shielding techniques.

MAINTENANCE

The UV sensor has a limited lifespan. Under extreme conditions, the lifespan can be as low as 10,000 hours. However, in the most favorable conditions, the lifespan is 50,000 hours or more. The service life of the UV sensor is considered terminated when the sensitivity becomes lower than 50% of the initial value.

A monthly sensitivity check is suggested to determine if the UV sensor's life is terminated. The reading of the signal processor digital display should be compared to the initial reading of the unit when it was installed. Ensure similar burner fire conditions of the application, and that the same gain settings of the viewing head are used during each sensitivity check. If it is determined that the sensitivity is below 50% of the initial value (terminated life of the sensor), the sensor should be replaced.

19 66-2069—01

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

HEX 1-1/2 (38) ACROSS FLATS

8-19/64

(211)

6-13/32

(163)

21/64 (8)

1-27/64

(36)

1-49/64 (45) DIA MOUNTING BLOCK

1/4 (6) 18 NPT FOR PURGE AIR

1/2 (13) 14 NPT FOR SIGHTING PIPE

M34283

1-31/64

(38)

7-23/32

(196)

(153)

1-1/2

(38)

M34284

HEX 1-1/2 (38) ACROSS FLATS

1-49/64 (45) DIA MOUNTING BLOCK

1/4 (6) 18 NPT FOR PURGE AIR

1/2 (13) 14 NPT FOR SIGHTING PIPE

13/32 (10)

1-1/8

(29) DIA

Fig. 8. Models S702 and S706 Viewing Heads.

Fig. 9. Models S802 and S806 Viewing Heads.

66-2069—01 20

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

RELAY CONNECTIONS

RS-422 WIRING

35MM DIN RAIL

APPROVED

2-29/32 (74)

5-1/2 (139)

+26

PWR

Fig. 10. Model 700DCSP Signal Processor.

DIN RAIL RELEASE

3-1/4 (83)

1/4

(6)

M34584

21 66-2069—01

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

MODEL 700AC

RELAY CONNECTIONS

RS-422 WIRING

35MM DIN RAIL

APPROVED

2-29/32 (74)

5-1/2 (139)

Fig. 11. Model 700ACSP Signal Processor.

DIN RAIL RELEASE

3-1/4 (83)

1/4

(6)

M34851

66-2069—01 22

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

1 (25) NPT NIPPLE TOE

700-1 SWIVEL MOUNT

BURNER FRONT PLATE

M34537

1/4 (6) NPT PURGE CONNECTION

S70X VIEWING HEAD

QUICK DISCONNECT CABLE CONNECTION (SUPPLIED)

M34538

1/4 (6) NPT PURGE CONNECTION

S70X VIEWING HEAD

QUICK DISCONNECT CABLE CONNECTION (SUPPLIED)

BURNER FRONT PLATE OR WINDOWBOX

1/2 (13) NPTM PIPE

FLANGE (OPTIONAL)

Fig. 12. Viewing Head Mounting Example.

Mounting Examples

Purge air should be provided via the purge air connection to reduce conducted heat and to keep the sight pipe and viewing head lens free of dirt and debris. Refer to “Purge Air” on page 10 for requirements. For electrical isolation reasons, the purge air line should be installed using and insulating material, such as a rubber hose, in between the purge air line and the viewing head. Note that an extension pipe may be required to locate the viewing head further from the burner front plate to avoid high temperatures. Additionally, an Ultem replacement

Fig. 13. Viewing Head Mounting Example.

insulating mounting block is available for all models, which is rated for 320F (160C) continuous service. Also available are cooling jackets which are used with vortex coolers. The Honeywell Ultem R-518-13 nipple or R-518-PT13/R-518PT13L locking coupler adapter and R-518-CL13-HTG locking coupler can also be used for heat insulation reasons. Refer to the Accessories section of this document for accessory part numbers.

23 66-2069—01

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

DETECTOR IN GOOD SIGHTING POSITION

(PARALLEL SIGHTING)

BURNER NOZZLE

CENTERLINE

DETECTOR IN POOR SIGHTING POSITION

LOW FREQUENCY

FLICKER ZONE

HIGH FREQUENCY

FLICKER ZONE

M33285

UV VIEWING

HEAD SIGHTED

ON UV ZONE

BURNER NOZZLE

CENTERLINE

UV RADIATION

ZONE

M33286

Fig. 14. IR Viewing Head Location

Fig. 15. UV Viewing Head Location

66-2069—01 24

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

VIEWING HEAD

BURNER NOZZLE NO. 1

NO. 1 FLAME

ENVELOPE

NO. 2 FLAME

ENVELOPE

VIEWING HEAD

BURNER NOZZLE NO. 2

HIGH FREQUENCY

IR ZONE

LOW FREQUENCY

ZONE

(LESS THAN 36Hz)

HIGH FREQUENCY

IR ZONE

M33287

Fig. 16. Opposed Fired Viewing Head Sighting

25 66-2069—01

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

IS THE PANEL LOCKED?

LOAD

FACTORY

DEFAULTS

PRESS LOAD FACTORY DEFAULTS FOR 2 SECONDS

2 SECS

IS THE AUTO SET

LIGHT LIT?

DISPLAY SHOWS ‘PL’,

MEANING THE PANEL IS LOCKED

DISPLAY SHOWS ‘CF’,

MEANING CONFIRM

RELAY ON 16

RATIO 50%

0-20/4-20mA OPTION 4-20mA

FFRT 1 SEC

NORMAL OPERATION

RESTORING DEFAULT VALUES

M34456

PRESS RESET OR WAIT 4 SECONDS TO CANCEL CHANGING THE AUTO SET VALUES

PRESS LOAD FACTORY DEFAULTS AGAIN TO CONFIRM YOU WANT TO CHANGE THE AUTO SET VALUES

LOAD

FACTORY

DEFAULTS

NORMAL OPERATION

ESET

66-2069—01 26

Fig. 17. Flow Chart 1 - Setting Factory Defaults.

AUTO SETUP

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

BNR-ON

SEQ

START/END

2 SECS

IS THE PANEL LOCKED?

PRESS BNR-ON SEQ FOR 2 SECONDS

IS THE AUTO SET

LIGHT LIT?

RESET

DISPLAY SHOWS ‘PL’

UNTIL KEY RELEASED

DISPLAY SHOWS ‘CF’,

MEANING CONFIRM

PRESS RESET OR WAIT 4 SECONDS TO CANCEL AUTO SETUP

BNR-ON

SEQ

START/END

PRESS BNR-ON SEQ AGAIN TO CONFIRM YOU WANT TO BEGIN TAKING DATA FOR AUTO SETUP

IS THE FLAME ON

LIGHT LIT?

CONTINUED NEXT PAGE

RESET

DISPLAY SHOWS ‘BO’,

MEANING BURNER OFF

PRESS RESET TO CANCEL AUTO SETUP

NORMAL OPERATION

Fig. 18. Flow Chart 2 - Auto Setup Page 1.

M34458

27 66-2069—01

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

AUTO SETUP - PAGE 2 (CONTINUED)

DISPLAY BEGINS COUNTING

DOWN FROM 59 SECONDS

BNR-ON

SEQ

START/END

NOTE:

RESET

PRESS BNR-ON SEQ AGAIN TO END TAKING BURNER ON DATA OR WAIT UNTIL THE COUNT REACHES ZERO (30 SECONDS MINIMUM RECOMMENDED)

DISPLAY RETURNS TO CURRENT FLAME SIGNAL

AND AUTO SETUP OFF SEQ LIGHT FLASHES

PRESS RESET AT ANY TIME DURING THIS PROCEDURE TO CANCEL AUTO SETUP

TURN BURNER OFF

IS THE AUTO SETUP

RATIO ACCEPTABLE?

RATIO < 72%

BNR-OFF

SEQ

START/END

BNR-OFF

SEQ

START/END

PRESS BNR-OFF SEQ TO BEGIN TAKING BURNER OFF DATA

DISPLAY BEGINS COUNTING

DOWN FROM 29 SECONDS

PRESS BNR-OFF SEQ AGAIN TO END TAKING BURNER OFF DATA OR WAIT UNTIL THE COUNT REACHES ZERO (15 SECONDS MINIMUM RECOMMENDED)

RATIO IS ACCEPTABLE

DISPLAY SHOWS NEW RATIO SETTING FOR ONE SECOND, THEN ‘_ _’ FOR ONE SECOND AND NEW VALUES ARE SAVED

CONTINUED NEXT PAGE

Fig. 19. Flow Chart 3 - Auto Setup Page 2.

66-2069—01 28

NORMAL OPERATION

M34459

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

AUTO SETUP - PAGE 3 (CONTINUED)

IS THE AUTO SETUP

RATIO MARGINAL?

71% < RATIO < 81%

NOTE:

RESET

RATIO

SET GAIN

PRESS RESET AT ANY TIME DURING THIS PROCEDURE TO CANCEL AUTO SETUP

RATIO MAY BE ACCEPTABLE

DISPLAY ALTERNATES SHOWING ‘AC’

AND THE NEW RATIO SETTING

PRESS ACCEPT RATIO / SET GAIN TO ACCEPT THE RATIO DISPLAYED

DISPLAY SHOWS ‘_ _’ FOR ONE SECOND

AND NEW VALUES ARE SAVED

IS THE AUTO SETUP

RATIO UNACCEPTABLE?

RATIO > 80%

NORMAL OPERATION

RESET

RATIO IS UNACCEPTABLE

DISPLAY ALTERNATES

SHOWING ‘UA’ AND RATIO

PRESS RESET TO CANCEL AUTO SETUP

NORMAL OPERATION

Fig. 20. Flow Chart 4: Auto Setup Page 3.

M34460

29 66-2069—01

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

SETTING RELAY ON VALUE

RELAY ON

SET

POINT

2 SECS

PRESS RELAY ON SET POINT FOR 2 SECONDS

IS THE PANEL LOCKED?

IS THE AUTO SET

LIGHT LIT?

DISPLAY SHOWS CURRENT

RELAY SETTING

INCREASE

DECREASE

USE INCREASE OR DECREASE KEYS TO ADJUST SETTING

DISPLAY SHOWS ‘PL’

UNTIL KEY RELEASED

DISPLAY SHOWS ‘CF’,

MEANING CONFIRM

INCREASE

DECREASE

USE INCREASE OR DECREASE KEYS TO ADJUST SETTING

Fig. 21. Flow Chart 5: Manual Flame On Setup.

RESET

RELAY ON

SET

POINT

PRESS RESET OR WAIT 4 SECONDS TO CANCEL CHANGING THE AUTO SETTING

PRESS RELAY ON SET POINT AGAIN TO CONFIRM YOU WANT TO CHANGE THE AUTO SETTING

STORE

RESET

PRESS STORE TO SAVE THE NEW SETTING

PRESS RESET OR WAIT 4 SECONDS TO RESTORE OLD SETTING

NORMAL OPERATION

M34461

66-2069—01 30

SETTING RATIO PERCENTAGE

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

RATIO (%)

RATIO OFF

RATIO ON

2 SECS

IS THE PANEL LOCKED?

IS THE AUTO SET

PRESS, RATIO (%), FOR 2 SECONDS

LIGHT LIT?

DISPLAY SHOWS CURRENT

RATIO SETTING IN PERCENT

INCREASE

USE INCREASE OR DECREASE KEYS

DECREASE

TO ADJUST SETTING

DISPLAY SHOWS ‘PL’,

UNTIL KEY RELEASED

DISPLAY SHOWS ‘CF’,

MEANING CONFIRM

INCREASE

DECREASE

USE INCREASE OR DECREASE KEYS TO ADJUST SETTING

Fig. 22. Flow Chart 6: Manual Flame Off Setup.

RESET

RATIO (%)

RATIO OFF

RATIO ON

PRESS RESET OR WAIT 4 SECONDS TO CANCEL CHANGING THE AUTO RATIO

PRESS RATIO (%) AGAIN TO CONFIRM YOU WANT TO CHANGE THE AUTO SETTING

STORE

RESET

PRESS STORE TO SAVE THE NEW SETTING

PRESS RESET OR WAIT 4 SECONDS TO RESTORE OLD SETTING

NORMAL OPERATION

M34462

31 66-2069—01

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

IS THE PANEL LOCKED?

FFRT

1/2/ 3 SEC

OPTION

PRESS, FFRT, FOR 2 SECONDS

2 SECS

DISPLAY SHOWS CURRENT

SETTING IN SECONDS

DISPLAY SHOWS ‘PL’,

UNTIL KEY RELEASED

NORMAL OPERATION

SETTING FLAME FAILURE RESPONSE TIME (FFRT)

M34463

USE INCREASE OR DECREASE KEYS TO ADJUST SETTING

INCREASE

DECREASE

USE INCREASE OR DECREASE KEYS TO ADJUST SETTING

INCREASE

DECREASE

PRESS RESET OR WAIT 4 SECONDS TO RESTORE OLD SETTING

PRESS STORE TO SAVE THE NEW SETTING

STORE

RESET

Fig. 23. Flow Chart 7: Flame Failure Response Time (FFRT) Setup.

66-2069—01 32

SETTING ANALOG OUTPUT LEVELS (0-20/4-20 mA)

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

0-20 mA 4-20 mA OPTION

2 SECS

INCREASE

DECREASE

PRESS, 0-20 / 4-20 mA OPTION, FOR 2 SECONDS

IS THE PANEL LOCKED?

USE INCREASE OR DECREASE KEYS TO ADJUST SETTING

INCREASE

DECREASE

DISPLAY SHOWS:

‘02’ FOR 0-20 mA ‘42’ FOR 4-20 mA

USE INCREASE OR DECREASE KEYS TO ADJUST SETTING

DISPLAY SHOWS ‘PL’,

UNTIL KEY RELEASED

STORE

RESET

PRESS STORE TO SAVE THE NEW SETTING

PRESS RESET OR WAIT 4 SECONDS TO RESTORE OLD SETTING

NORMAL OPERATION

Fig. 24. Flow Chart 8: 0-20/4-20mA Analog Output Setup.

33 66-2069—01

M34464

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

IS THE PANEL LOCKED?

DISPLAY SHOWS CURRENT

GAIN SETTING

DISPLAY SHOWS ‘PL’

UNTIL KEY RELEASED

NORMAL OPERATION

SETTING VIEWING HEAD GAIN

M34465

USE INCREASE OR DECREASE KEYS TO ADJUST SETTING

INCREASE

DECREASE

PRESS RESET OR WAIT 4 SECONDS TO RESTORE OLD SETTING

PRESS STORE TO SAVE THE NEW SETTING

STORE

RESET

RATIO

SET GAIN

PRESS ACCEPT RATIO / SET GAIN FOR 2 SECONDS

2 SECS

Fig. 25. Flow Chart 9: Viewing Head Gain Setting.

66-2069—01 34

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

SAFETY MANUAL: 700 SIGNAL PROCESSOR

700ACSP, 700DCSP Product Declaration

FIT FOR USE IN A LOW DEMAND SAFETY APPLICATION.

Models: 700ACSP & 700DCSP

Models SIL HFT SFF PFD

700AC 3 0 >99%

700DC 3 0 >99%

1.79 x 10

-4

1.93 x 10

1.36 x 10

-6

8.53 x 10

-9

8.20 x 10

-9

System Architecture 1oo1

MTTR (Mean Time to Restoration 8 hours

Proof Test Intermal 5 years

Fit for use in SIL 3 environment

Table 5. Definitions.

Term Definition

Dangerous Failure Failure which has the potential to put the safety-related system in a hazardous or fail-to-function

state.

Safety-related System A system that implements the required safety functions required to achieve or maintain a safe

state and is intended to achieve on its own or with other systems the necessary safety integrity for the required safety functions.

Safety Function Defined function, which is performed by a safety-related system with the aim of achieving or

maintaining a safe state for the plant, in respect of a specified hazardous event.

Proof Test Periodic test performed to detect failures in a safety-related system so that, if necessary, the

system can be restored to an “as new” condition or as close as practical to this condition.

MTTR (Mean Time to

The average duration required for restoration of operations after a failure.

Restoration)

Rate of safe detectable failures per one billion hours. For example if λ

= 3000, then it is estimated that there will be about 3,000 safe detectable

failures during every one billion hours of operation. For λ

Rate of safe undetectable failures per one billion hours.

Rate of dangerous detectable failures per one billion hours.

Rate of dangerous undetectable failures per one billion hours.

= 3000, this is about one safe detectable failure every 38 years.

HFT Hardware Fault Tolerance

System Architecture Specific configuration of hardware and software elements in a system.

PFD

(Average Probability

AVG

Average Probability of Failure on Demand. In this case, regarding the 700 Signal Processor.

of Failure on Demand)

FIT (Failures in Time) A unit of measurement representing one failure per billion hours. 1,000,000,000 hours is

approximately 114,155.25 years.

35 66-2069—01

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

Safety Function of the 700

The safety function of the 700 signal processor consists of a Flame Relay which comprises its safety function and behaves as follows:

The Flame Relay (Normally Open)

• The Flame Relay will be energized when the signal processor is powered and a flame on condition is detected.

• The Flame Relay will be de-energized when the signal processor is powered, a flame of condition is detected, and the FFRT (Flame Failure Response Time) has elapsed.

• The Flame Relay will be de-energized when the signal processor is powered and detects a fault condition.

• The Flame Relay will be de-energized when power to the signal processor is off.

As an added safety feature, the coil of the Flame Relay is wired in series with a second pole of contacts on a Self Check Relay. The Self Check Relay is designed to be closed during normal operation of the signal processor and open during detection of a fault or power down. It is physically impossible for the Flame Relay to be closed if the Self Check Relay is

open, unless the contacts of the Flame Relay are welded closed or the contacts of the Self Check Relay are welded closed. To reduce the chance of a false flame on condition, it is recommended that the user wire the Flame and Self Check Relays in series.

Also, as another added safety feature, neither relay can be driven by a simple continuously high or continuously low signal which could potentially be cuased by a fault. Each relay must be driven by an alternating signal of the proper frequency and duty cycle from the processor.

700AC or 700DC Signal Processor Proof Test Interval

The Proof test must be conducted every 1 to 5 years. This range is given to allow for the test to be performed during the normally scheduled burner shutdown period. It is the responsibility of the user to perform the proof test in the specified time frame.

The following diagram presents the dependence of the PFD the proof test interval increases.

on the proof test interval. The PFD

AVG

increases as

AVG

PFD

-04

4.00E

-04

3.50E

-04

3.00E

-04

2.50E

-04

2.00E

AVG

-04

1.50E

-04

1.00E

-05

5.00E

+00

0.00E 0 1 2

3 4

Fig. 26. Dependence of the PFD

700 AC PFD

AVG

VS TIME

AVG

5 6

TIME (YEARS)

7 8

on the proof test interval for 700AC.

9 10

M35037

66-2069—01 36

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

PFD

-04

4.00E

-04

3.50E

-04

3.00E

-04

2.50E

-04

2.00E

AVG

-04

1.50E

-04

1.00E

-05

5.00E

+00

0.00E 0 1 2

3 4

Fig. 27. Dependence of the PFD

700 DC PFD

AVG

VS TIME

AVG

5 6

TIME (YEARS)

7 8

on the proof test interval for 700DC.

700AC or 700DC Signal Processor Proof Test Procedure

Equipment

• Powered 700AC or 700DC correctly connected to a compatible viewing head.

• Multimeter able to take voltage and resistance measurements.

• For 700AC signal processors, an 85V AC to 265V AC power source.

• For 700DC signal processors, a 22V DC to 26V DC power supply.

• Light source* capable of generating a flame on condition.

* Generally an incandescent bulb will work for IR viewing head sensors and a deep UV light or flame will work for UV viewing head sensors

Setup

1. Ensure the 700AC or 700DC signal processor under

test is correctly connected to a compatible viewing head and is fully operational.

2. While performing the proof test, disconnect or disregard the signal processor outputs so that any outputs due to testing do not affect the overall safety system and potentially cause a hazardous situation.

3. Record all previously entered user programmable settings so that you can restore them to their desired values after the proof test.

Tests

1. Remove power to the signal processor and, using a

multimeter, ensure continuity between ‘SC COM’ and ‘SC OFF’.

2. Reapply power to the signal processor and, using a multimeter, ensure continuity between ‘SC COM’ and ‘SC ON’.

3. Use a light source to generate a flame on condition and, using a multimeter, ensure continuity between ‘RF A COM’ and ‘RF A ON’, and between ‘RF B COM’ and ‘RF B ON’.

4. Remove any light source to generate a flame off condition and, using a multimeter, ensure continuity between ‘RF A COM’ and ‘RF A OFF’, and between ‘RF B COM’ and ‘RF B OFF’, after the FFRT (Flame Failure Response Time) has elapsed.

5. Measure the current draw of the signal processor with its viewing head attached and ensure it is less than

0.07A RMS for 700AC signal processors and 250mA for 700DC signal processors.

6. Measure the DC voltage between ground ‘VH GND’ and ‘VH +V’ going to the viewing head. Ensure it is between 20 and 26 V DC.

7. Change one of the settings of the signal processor and store the changed setting. Remove power to the signal processor for 10 seconds. Restore power to the signal processor and ensure the stored value has remained unchanged.

8. Use your light source to generate flamecounts of between 12 and 22 on the signal processor. Note the flamecount. a. Increase the gain and store the setting. Ensure the

flamecount increased.

b. Decrease the gain and store the setting. Ensure the

flamecount decreased.

9. Restore all original settings as recorded in Setup and reconnect the signal processor to the safety system.

Product Decommissioning

When required, decommissioning of the 700 should be performed in accordance with requirements of the overall safety system.

9 10

M35038

37 66-2069—01

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

SAFETY MANUAL: 70X & 80X VIEWING HEAD

702, 706, 802, AND 806

Product Declaration

FIT FOR USE IN A LOW DEMAND SAFETY APPLICATION.

Models: 702, 702-PF, 702-HF, 702-HF-PF, 706, 706-PF, 802, 802-HF, 806

Models SIL HFT SFF PFD

702 and 802 3 0 >99%

706 and 806 3 0 >99%

1.81 x 10

1.51 x 10

-10

-5

1.70 x 10

1.02 x 10

-7

-5

2.27 x 10

-11

6.90 x 10

-10

System Architecture 1oo1

MTTR (Mean Time to Restoration 8 hours

Proof Test Intermal 5 years

Fit for use in SIL 3 environment

Table 6. Definitions.

Term Definition

Dangerous Failure Failure which has the potential to put the safety-related system in a hazardous or fail-to-function

state.

Safety-related System A system that implements the required safety functions required to achieve or maintain a safe

state and is intended to achieve on its own or with other systems the necessary safety integrity for the required safety functions.

Safety Function Defined function, which is performed by a safety-related system with the aim of achieving or

maintaining a safe state for the plant, in respect of a specified hazardous event.

Proof Test Periodic test performed to detect failures in a safety-related system so that, if necessary, the

system can be restored to an “as new” condition or as close as practical to this condition.

MTTR (Mean Time to

The average duration required for restoration of operations after a failure.

Restoration)

Rate of safe detectable failures per one billion hours. For example if λ

= 3000, then it is estimated that there will be about 3,000 safe detectable

failures during every one billion hours of operation. For λ

Rate of safe undetectable failures per one billion hours.

Rate of dangerous detectable failures per one billion hours.

Rate of dangerous undetectable failures per one billion hours.

= 3000, this is about one safe detectable failure every 38 years.

HFT Hardware Fault Tolerance

System Architecture Specific configuration of hardware and software elements in a system.

PFD of Failure on Demand)

(Average Probability

AVG

Average Probability of Failure on Demand. In this case, regarding the 702, 706, 802, and 806 viewing heads.

FIT (Failures in Time) A unit of measurement representing one failure per billion hours. 1,000,000,000 hours is

approximately 114,155.25 years.

66-2069—01 38

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

Safety Function of the 702, 706, 802, and 806

The 702, 706, 802, and 806 viewing heads do not have a safety function. They are used to provide flame intensity information via cables to JB Systems, Inc. Signal Processor Models 531AC, 531DC, 532AC, 532DC, 700AC, 700DC, and 800 which use Flame Relays to provide a safety function.

S706 AND S806 PFD

PFD

3.50E

3.00E

2.50E

2.00E

AVG

1.50E

1.00E

-05

70x and 80x Viewing Head Proof Test Interval

The proof test must be conducted every 1 to 5 years. This range is given to allow for the test to be performed during the normally scheduled burner shutdown period. It is the responsibility of the user to perform the proof test in the specified time frame.

The following diagrams present the dependence of the PFD the proof test interval increases.

on the proof test interval. The PFD

AVG

VS TIME

AVG

increases as

AVG

-06

5.00E

+00

0.00E 0 1 2

3 4

Fig. 28. Dependence of the PFD

5 6

TIME (YEARS)

on the proof test interval for S706 & S806.

AVG

7 8

9 10

M35040

39 66-2069—01

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD

70x and 80x Viewing Head Proof Test Procedure

Equipment

• Powered compatible signal processor* correctly connected to a 702, 706, 802, or 806 viewing head

• Light source** capable of generating a flame on condition.

*If your viewing head is connected to a Model 800 Signal Processor, a computer or Palm PDA (Personal Data Assistant) with FlameTools Software, or Model 800 Signal Processor Programmer will be needed to view the flame count and adjust the gain.

**Generally an incandescent bulb will work for IR viewing head sensors and a deep UV light or flame will work for UV viewing head sensors

Setup

1. Ensure the 702, 706, 802, or 806 viewing head under

test is correctly connected to a compatible signal processor.

3. Record all previously entered user programmable settings so that you can restore them to their desired values after the proof test.

Tests

NOTE: 702 and 802 viewing heads must be illuminated

by an infrared light source. 706 and 806 viewing heads must be illuminated by an ultraviolet light source.

1. Apply power to the signal processor, fully illuminate the

viewing head with the light source, and ensure that a flame on condition is indicated by the signal processor.

2. Gradually angle the light source away from the viewing head. Ensure that the count decreases until a flame off condition is indicated by the signal processor.

3. Cover the end of the viewing head with your hand and ensure that the signal processor indicates a flame count of zero.

4. For model 531AC, 531DC, 532AC, and 532DC, signal processors, use your light source to generate a flamecount of between 1200 and 2800, and note the flamecount. For model 700AC, 700DC, and 800 signal processors, use your light source to generate a flamecount of between 12 and 22, and note the flamecount. a. Increase the gain and store the setting. Ensure the

flamecount increased.

b. Decrease the gain and store the setting. Ensure the

flamecount decreased.

5. Restore all original settings as recorded in Setup and reconnect the signal processor to the safety system.

Product Decommissioning

When required, decommissioning of the 70X and 80X viewing heads should be performed in accordance with requirements of the overall safety system.

Automation and Control Solutions

Honeywell International Inc.

1985 Douglas Drive North

Golden Valley, MN 55422

customer.honeywell.com

Honeywell S702, S702HF, S702PF, S702HFPF, S706 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

APPLICATION

FEATURES

SPECIFICATIONS

APPROVALS

INSTALLATION

When Installing These Products...

Signal Processor Mounting

Grounding and Shielding

Signal Processor Power Connections

Viewing Head Connector and Wiring

Cable Preparation

Protecting the Viewing Head Cable (Connector Series)

Viewing Head Connector LED Indicators

Viewing Head Mounting and Sighting

ACCESSORIES

OPERATION

IR Detector

UV Detector

Self-Checking

Adjustment of VH Sighting and Gain

Orificing

Signal Processor User Interface

Manual Setup of Setpoints

Setting the Viewing Head Gain

Automatic Setup of Setpoints

Loading Factory Defaults

Panel Lock

Communication Setting

Working with Older UV Viewing Heads

MODBUS COMMUNICATION

Modbus RTU Function Supported

TROUBLESHOOTING

Lockout or Faulty VH Indication

Parameter Match Error

Panel Lock with No VH Connected

Grounding and Shielding

MAINTENANCE

Mounting Examples

SAFETY MANUAL: 700 SIGNAL PROCESSOR

700ACSP, 700DCSP Product Declaration

Safety Function of the 700

700AC or 700DC Signal Processor Proof Test Interval

700AC or 700DC Signal Processor Proof Test Procedure

Product Decommissioning

SAFETY MANUAL: 70X & 80X VIEWING HEAD

Safety Function of the 702, 706, 802, and 806

70x and 80x Viewing Head Proof Test Interval

70x and 80x Viewing Head Proof Test Procedure

Product Decommissioning