Grieve Corporation S7800A Installation Manual

S7800A Keyboard Display Module

APPLICATION

The S7800A Keyboard Display Module (KDM) provides firstout annunciation and system diagnosis using a two-row by twenty-column readout. The KDM provides local or remote annunciation of operation and fault information, remote reset, report generation, burner control data and diagnostic information. The KDM is part of the 7800 SERIES of microprocessor-based burner controls for gas, oil, coal or combination fuel single burner applications.

The 7800 SERIES is programmed to provide a level of safety, functional capabilities and features beyond the capacity of conventional controls.

7800 SERIES

PRODUCT DATA

FEATURES

• Application flexibility.

• Communication interface capability (RM78XX only).

• Dependable, long-term operation provided by microcomputer technology.

• First-out annunciation and system diagnostics provided by a 2-row by 20-column display.

• First-out expanded annunciation with 24 limit and interlock Light Emitting Diodes (LED).

• Local or remote annunciation of operation and fault information.

• Remote reset.

• Report generation.

• Burner controller data: — Sequence status. — Sequence time. — Hold status. — Lockout/alarm status. — Flame signal strength. — Expanded annunciator status. — Total cycles of operation. — Total hours of operation. — Fault history of six most recent faults:

• Cycles of operation at time of fault.

• Expanded annunciator data at time of fault.

• Fault message and code.

• Hours of operation at time of fault.

• Sequence status at time of fault.

• Sequence time at time of fault.

— Diagnostic information:

• Device type.

• Flame amplifier type.

• Flame failure response time (FFRT).

• Manufacturing code.

• On-Off status of all digital inputs and outputs.

• PREPURGE time selected.

• Software revision and version of 7800 SERIES Relay Module and KDM.

• Status of configuration jumpers.

• Status of Run/Test Switch.

Contents

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

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

Specifications ...................................................................... 2

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

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

Wiring .................................................................................. 4

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

65-0090-3

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

,

SPECIFICATIONS

Electrical Ratings:

Voltage and Frequency: 13 Vdc peak full wave rectified

(+20/-15%). Power Dissipation: 7W maximum. VA Consumption: 2 VA maximum.

Terminal Ratings:

Power: 13 Vdc peak full wave rectified. Earth Ground.

Environmental Ratings:

Ambient Temperature Ranges:

Operating: -40°F (-40°C) to +140°F (+60°C).

Storage: -60°F (-51°C) to +150°F (+66°C). Humidity: 85 percent relative humidity continuous,

noncondensing. Vibration: 0.5G environment.

Mechanical:

Dimensions: See Fig. 1. Weight: 4 ounces (124 grams), unpacked.

Display:

40 character (2 rows by 20 columns).

Languages:

S7800A1001 English language display. S7800A1035 French language display. S7800A1043 German language display. S7800A1050 Italian language display. S7800A1068 Spanish language display. S7800A1118 Japanese (Katakana) language display. S7800A1126 Portuguese language display.

BURNER CONTROL

2-3/4 (69)

15/ 32 (12)

1-15/16 (49)

29/32 (23)

SCROLL MODE

19/32 (15)

5/32 (4)

4-27/32 (123)

1-1/4 (32)

7/16 (11)

2-7/16 (62)

3-7/8 (99)

SAVE

4-3/32 (104)

1-1/32 (26)

13/ 32 (11)

5/32 (4)

1/2 (13)

5/16 (8)

2-1/32 (52)

5/15 (8)

29/32 (23)

M5002B

Fig. 1. Approximate dimensions of S7800 in in. (mm).

Approvals:

Underwriters Laboratories Inc. Listed:

File No. MP268, Guide No. MCCZ.

Canadian Standards Association Certified:

No. LR9S329-3. Factory Mutual Approved: Report No. J.I.1V9A0.AF. IRI: Acceptable. Federal Communications Commission: Part 15,

Class B emissions. EN60730: For compliance with remote KDM mounting

requirements, provide electrical insulation separation by

insulation using double or reinforced insulation. Do this

by: Optically isolating the communication or remote

reset lines from the control cabinet, or provide physical

separation from the communication or remote display

cover assembly (part number 204718A) or other

suitable enclosure that meets the IP40 class of

protection.

ORDERING INFORMATION

When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the TRADELINE® Catalog or price sheets for complete ordering number.

If you have additional questions, need further information, or would like to comment on our products or services, please write or phone:

1. Your local Home and Building Control Sales Office (check white pages of your phone directory).

2. Home and Building Control Customer Logistics Honeywell Inc., 1885 Douglas Drive North Minneapolis, Minnesota 55422-4386 (612) 951-1000

In Canada—Honeywell Limited/Honeywell Limitée, 155 Gordon Baker Road, North York, Ontario M2H 3N7. International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.

65-0090—3 2

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

Accessories:

203541 ControlBus 5-wire Electrical Connector. S7810A1009 Data ControlBus Module™. 203765 Remote Display Mounting Bracket. 221818A 60 in. (1.5m) Extension Cable Assembly. 221818C 120 in. (3m) Extension Cable Assembly. 204718A NEMA 4 Cover Assembly for S7800A KDM. 204718B NEMA 1 Cover Assembly for S7800A KDM. 204718C NEMA 4 Cover Assembly for S7800A KDM with

reset button.

205321B Remote Display Flush Mount Kit.

INSTALLATION

WARNING

Electrical Shock Hazard. Can cause serious injury or death.

Disconnect the power supply before beginning installation to prevent electrical shock and equipment damage. More than one power supply disconnect can be involved.

When Installing This Product...

1. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition.

2. Check the ratings given in the instructions and marked on the product to make sure the product is suitable for your application.

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

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

Humidity

Install the S7800A where the relative humidity never reaches the saturation point. The S7800 is designed to operate in a maximum 85% RH continuous, noncondensing, moisture environment.

Vibration

Do not install the S7800A where it can be subjected to vibration in excess of 0.5G continuous maximum vibration.

Weather

The S7800A is not designed to be weather tight. If installed outdoors, the S7800A must be protected by an approved weather-tight enclosure such as the 204718A or 204718C NEMA 4 Enclosure listed in Accessories.

Mounting KDM on 7800 SERIES Relay Module.

1. Align the two interlocking ears of the KDM with the two mating slots on the 7800 SERIES Relay Module. See Fig. 2.

5. Be sure wiring complies with all applicable codes, ordinances and regulations.

6. See Fig. 5, 6 and 7 for S7800A unique wiring connections.

IMPORTANT

1. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, can cause interference to radio communications. It has been tested and found to comply with the limits for a Class B computing device of Part 15 of FCC rules which are designed to provided reasonable protection against such interference when operated in a commercial environment. Operation of this equipment in a residential area can cause interference, in which case, users, at their own expense, can be required to take whatever measures are required to correct this interference.

2. This digital apparatus does not exceed the Class B limits for radio noise for digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications.

Fig. 2. Keyboard display module mounting.

2. Insert the two interlocking ears into the two mating slots

and, with a hinge action, push on the lower corners of the KDM to secure it to the 7800 SERIES Relay Module.

3. Make sure the KDM is firmly in place.

Remote Mounting KDM

The KDM can be mounted either on the face of a panel door or on other remote locations. See Fig. 3. When mounting the KDM on the face of a door panel, closely follow these instructions:

65-0090—33

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

Fig. 3. Panel mounting of a keyboard display module.

1. Select the location on the door panel for flush

mounting.

2. Pay attention to the insertion dimensions of the two KDM screws, two interlocking ears, and the two plug-in connections to allow for sufficient clearance.

3. Use the KDM or Data ControlBus Module™ as a template (Fig. 16) and mark the two screw locations, interlocking ear locations and the two plug-in connector locations.

4. Drill the pilot holes for the mounting screws.

5. Cut holes in the door panel for the interlocking ears and

the two plug-in connectors.

6. Mount the KDM, securing it with the two screws provided in the KDM bag assembly.

Use the 203765 Remote Display Mounting Bracket when mounting the KDM on a wall or remote location:

1. Use the 203765 Remote Display Mounting Bracket as a template to mark the four screw locations.

2. Drill the pilot holes for the four mounting screws.

3. Mount the 203765 Remote Display Mounting Bracket

by securing the four no. 6 screws (M3.5 x 0.6). See Fig. 4.

4. Mount the KDM by aligning the two interlocking ears with the two mating slots on the remote mounting bracket.

5. Insert the two interlocking ears into the two mating slots.

6. Push on the lower corners of the KDM to secure it to the remote mounting bracket.

7. Make sure the KDM is firmly in place.

Fig. 4. Remote mounting of a keyboard display module

using a 203765 Remote Display Mounting Bracket.

WIRING

WARNING

Electrical Shock Hazard. Can cause serious injury or death.

To prevent electrical shock and equipment damage, disconnect the power supply from the main disconnect before beginning installation. More than one disconnect can be involved.

1. Refer to Fig. 5, 6, and 7 for proper wiring.

2. Make sure all wiring complies with all applicable

electrical codes, ordinances and regulations.

3. For recommended wire size and type, see Table 1.

4. For Recommended grounding practices, see Table 2.

5. For KDM: The KDM is powered from a low voltage,

energy-limited source. It can be mounted outside of a control panel if it is protected from mechanical damage.

NOTE: A 13 Vdc power supply must be used any time more

than one KDM is used. A maximum of two KDM, Data ControlBus Modules™ or S7810B Multi-Drop Switch Modules are allowed in any combination.

65-0090—3 4

Application Recommended Wire Size Recommended Part Numbers

120 OHM RESISTOR

C (GND)

+13 VDC

RESET

MOMENTARY PUSH BUTTON SWITCH

S7800 KEYBOARD DISPLAY MODULE (MOUNTED ON 7800 SERIES RELAY MODULE)

QS7800 COMMUNICATIONS INTERFACE CONTROLBUS MODULE, MOUNTED IN Q7700 COMMUNICATIONS INTERFACE MODULE

THREE WIRE SHIELDED CABLE MAY BE REQUIRED. TWO 120 OHM TERMINATING RESISTORS ARE REQUIRED FOR CONNECTIONS OVER 100 FEET (30 METERS). CABLE SHIELD MUST BE TERMINATED TO EARTH GROUND AT BOTH ENDS. IF SHIELDED CABLE IS NOT USED, TWISTED PAIR WIRE MUST BE USED.

WHEN CONNECTING THE KEYBOARD DISPLAY MODULE, DATA CONTROLBUS MODULE™, OR REMOTE RESET MODULE EXTERNAL FROM THE CONTROL CABINET, APPROPRIATE MEASURES MUST BE TAKEN TO MEET EN60730 SAFETY LOW VOLTAGE REQUIREMENTS (SEE APPROVALS).

M1990E

Keyboard Display Module 22 AWG two-wire twisted pair with ground, or five-wire. Belden 8723 shielded cable or

Data ControlBus Module™ 22 AWG two-wire twisted pair with ground, or five-wire. Belden 8723 shielded cable or

Remote Reset Module 22 AWG two-wire twisted pair, insulated for low voltage. — Communications Interface

ControlBus Module™ 13 Vdc full wave rectified

transformer power input.

Ground Type Recommended Practice

Signal ground (KDM, Data ControlBus Module™, Communications Interface ControlBus Module™).

6. Recommended wire routing: a. ControlBus:

1. Do not route the ControlBus cable in

2. Avoid routing the ControlBus cable close to

3. Route the ControlBus cable outside of

b. Remote Reset:

1. Do not run high voltage ignition transformer

2. Do not route Remote Reset wires in conduit

7. Maximum wire lengths: a. KDM: The maximum length interconnecting wire

is 4000 ft (1219m).

b. Remote Reset leadwires: The maximum length

wire is 1000 ft (300m) to a Remote Reset pushbutton.

8. Install all electrical connectors.

9. Restore power to the panel.

Table 1. Recommended Wire Size and Part Number.

22 AWG two-wire twisted pair with ground. Belden 8723 shielded cable or

18 AWG wire insulated for voltages and temperatures for given applications.

Table 2. Recommended Grounding Practices.

Use the shield of the signal wire to ground the device to the signal ground terminals [3(c)] of each device. Connect the shield at both ends of the daisy chain to ground.

conduits that carry line voltage circuits.

ignition transformer leadwires.

conduit if properly supported and protected from damage.

wires in the same conduit with the Remote Reset wiring.

with line voltage circuits.

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

equivalent.

equivalent. TTW60C, THW75C, THHN90C

Fig. 5. Wiring the keyboard display module.

65-0090—35

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

S7800 KEYBOARD DISPLAY MODULE (MOUNTED ON 7800 SERIES RELAY MODULE)

MOMENTARY PUSHBUTTON

C (GND)

23 54

120 OHM RESISTOR

S7800 REMOTE KEYBOARD DISPLAY MODULE

THREE WIRE SHIELDED CABLE MAY BE REQUIRED. TWO 120 OHM TERMINATING RESISTORS ARE REQUIRED FOR CONNECTING OVER 100 FEET [30 METERS]. CABLE SHIELD MUST BE TERMINATED TO EARTH GROUND AT BOTH ENDS. IF SHIELDED CABLE IS NOT USED, TWISTED PAIR WIRE MUST BE USED.

WHEN CONNECTING THE KEYBOARD DISPLAY MODULE DATA CONTROLBUS MODULE™, OR REMOTE RESET MODULE EXTERNAL FROM THE CONTROL CABINET, APPROPRIATE MEASURES MUST BE TAKEN TO MEET EN60730 SAFETY LOW VOLTAGE REQUIREMENTS (SEE APPROVALS).

7800 SERIES RELAY MODULE CAN SUPPORT ONE S7800 KEYBOARD DISPLAY MODULE. A 13 Vdc POWER SUPPLY IS REQUIRED FOR EACH ADDITIONAL DISPLAY.

UP TO 36 S7800 KEYBOARD DISPLAYS CAN BE CONNECTED TO A SINGLE 7800 RELAY MODULE NOT TO EXCEED 4000 FEET (1219M) TOTAL LEADWIRE RUN. DAISY CHAIN 1 TO 1, 2 TO 2, 3 TO 3 AND PROVIDE 13 Vdc POWER SUPPLY FOR EACH S7800 DISPLAY.

23 54

C (GND)

+13 VDC

RESET

SWITCH

13 Vdc POWER SUPPLY

L1 (HOT)

M5006F

Fig. 6. Wiring for multiple keyboard display modules.

available. The 7800 SERIES Relay Module LED provide positive visual indication of the Relay Module sequence. The LED is energized simultaneously with the correct sequence description.

S7810 DATA CONTROLBUS MODULE™ (MOUNTED ON 7800 SERIES RELAY MODULE)

MOMENTARY PUSH BUTTON

120 OHM RESISTOR

7800 REMOTE KEYBOARD DISPLAY MODULE

THREE WIRE SHIELDED CABLE MAY BE REQUIRED. TWO 120

OHM TERMINATING RESISTORS ARE REQUIRED FOR CONNECTIONS OVER 100 FEET. CABLE SHIELD MUST BE TERMINATED TO EARTH GROUND AT BOTH ENDS. IF SHIELDED CABLE IS NOT USED, TWISTED PAIR WIRE MUST BE USED.

221818A OR C EXTENSION CAN BE USED IN PLACE OF THE S7810 DATA CONTROLBUS MODULE™ IF DISPLAY IS TO A CABINET DOOR.

C (GND)

+13 VDC

RESET

SWITCH

M5285C

Fig. 7. Wiring keyboard display module for remote

mounting.

KDM Display

The first line of the KDM display provides current status of the burner sequence (STANDBY, PURGE, PILOT IGN, MAIN IGN, RUN and POSTPURGE), timing information (PURGE, PILOT IGN, MAIN IGN and POSTPURGE) in minutes and seconds, hold information (PURGE HOLD), and lockout information (Lockout, Fault Code, Message and Sequence), see Fig. 8. The extreme right side of the first line will be either blank or will show a small arrow pointing to the second line followed by a two-letter code (DI—Diagnostic Information, Hn—Fault History Information (where n equals the number of the fault), and EA—Expanded Annunciator). When the arrow and two-letter code are displayed, it indicates the second line is showing a selectable message submenu. The second line will display selectable or preemptive messages. A selectable message supplies information for flame strength, system status indication, system or self-diagnostics and troubleshooting. A preemptive message has parentheses around the message and supplies a detailed message to support the sequence status information. A preemptive message can also be a lockout message. A preemptive message replaces a selectable message to support the sequence status information. It also replaces a selectable message after 60 seconds if it or a lockout message is

65-0090—3 6

FIVE WIRE CONNECTOR FOR COMMUNICATIONS, REMOTE KEYBOARD

DI = DIAGNOSTICS H1 = HISTORY EA = EXPANDED ANNUNCIATOR

SEQUENCE STATUS

SELECTABLE MESSAGE OR PREEMPTIVE MESSAGE

DISPLAY AND REMOTE RESET

M7412

Fig. 8. S7800 Keyboard Display Module.

Keyboard Functions

The keyboard contains four push-buttons with separate functions (SCROLL-down, SCROLL-up, MODE, and CHANGE-LEVEL). The MODE and CHANGE-LEVEL, when pressed together, provide a SAVE function.

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

1. SCROLL down-up push-buttons (◊). See Fig. 9. The

SCROLL down-up push-buttons (◊) are used to scroll through the selectable messages. The double-headed arrow (◊), which is located in the lower left position of the second line of the display, represents the SCROLL down-up push-buttons. The SCROLL down-up pushbuttons (◊) can be pressed to display the selectable messages one at a time or held down to scroll through the selectable messages at the rate of two per second. When the last item of the selectable message is viewed, the display wraps around and displays the first selectable message again.

2. CHANGE-LEVEL push-button (↔), see Fig. 10. The

CHANGE-LEVEL push-button is used to change

BURNER CONTROL

RUN Total Cycles 333

SCROLL

MODE

SAVE

between the first hierarchy of selectable messages to a subset of selectable messages. The CHANGE-LEVEL push-button can also be used to change from a subset message to a first level selectable message. The symbol (<), located on the second line in the lower right corner of the display, represents a subset of selectable messages.

3. MODE push-button, see Fig. 11. Use the MODE pushbutton to instantaneously switch the display from a second-line selectable message to a second-line preempted message. The sixty second time-out function can also be used for this task. The MODE push-button only works if there is a second-line preempted message or a lockout message.

BURNER CONTROL

RUN Total Hours 1332

SCROLL

MODE

SAVE

Fig. 9. (

BURNER CONTROL

PILOT IGN 00:05 Fault History

SCROLL

MODE

SAVE

Fig. 10. (

BURNER CONTROL

LOCKOUT 17 DI Main Valve T9 = O

◊) SCROLL push-button function.

BURNER CONTROL

PILOT IGN 00:10 H1 Fault Cycle 174

SCROLL

÷ ) CHANGE-LEVEL push-button function.

BURNER CONTROL

LOCKOUT 17 *Main Flame Fail*

M1932A

MODE

SAVE

M1933A

SCROLL

MODE

SAVE

Fig. 11. MODE push-button function.

SCROLL

MODE

SAVE

M1934C

65-0090—37

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

4. SAVE function, see Fig. 12. The SAVE function enables users to identify the selectable message they want to view upon power restoration. The second line selectable message are restored to the most recently saved selection when power returns. The SAVE function is performed is by pressing and holding the MODE key and then pressing the CHANGE-LEVEL key (↔). The second line of the display briefly notes “…SAVING…” to confirm the keys were pressed.

BURNER CONTROL

PURGE 00:30 ... SAVING ...

Selectable Messages

For the second line display, two-level hierarchy, see Table 3.

SCROLL

MODE

SAVE

The display values are as follows:

n represents a numbered value. T represents the terminal number.

M1935A

x represents the suffix letter of the Relay Module.

Fig. 12. SAVE function.

Table 3. Selectable Messages.

Selectable

Message/Display Description

Flame Signal Flame signal strength. 0 - 5.0 Vdc Flame

Total Cycles Total number of equipment

operating cycles.

Total Hours Total number of equipment

operating hours.

Possible States/

Range (Terminals) Comments

Flame relay pull-in and drop-out

Amp (+ and - (Com)) 0 - 99,999

(250,000) cycles 0 - 99,999

(250,000) hours

value 1.25 Vdc. Cycle will be updated each time

main valve is energized. Hour will be updated each time

main valve output is energized for 60 minutes.

Fault History > (Six most recent faults)

Fault Cycle H1 Cycle when fault occurred. 0 - 99,999 cycles

First level prompt for history information. Has subset level.

——

—

(250,000) cycles

Fault Hours H1 Run hour when fault occurred. 0 - 99,999

(250,000) hours

Fault Code H1 Number that identifies the

0 - 999 —

—

reason for lockout. *Fault Message* H1 Indicates cause of lockout. — — Sequence Message H1 Indicates where in the sequence

——

the lockout occurred. (Second Line Message) H1 Second line message explains

—— any further information that is available from the 7800 SERIES or may be blank if there is not a preemptive second-line. H2…H6 etc.

Diagnostic Information > First level prompt for diagnostic

—— information. Has subset level.

Device Device type number. RM78XXX or EC78XXX — Device Suffix Device suffix number. nnnn — Run/Test Sw. Position of Run/Test Switch. RUN or TEST Indicates if 7800 SERIES is in

RUN or TEST mode.

OperControl T6 Operating Control Input. = 1 or 0 Indicates if input is on or off,

energized or de-energized.

Interlock T7 Running/Lockout Interlock. = 1 or 0 Indicates if input is on (1) or off

(0), energized or de-energized.

European Approved Controls.

(continued)

65-0090—3 8

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

Table 3. Selectable Messages (continued).

Selectable

Message/Display Description

Pilot Valve T8 Pilot Valve. = 1 or 0 Indicates if output terminal is on

Main Valve T9 Main Fuel Valve. = 1 or 0 Indicates if output terminal is on

Ignition

T10 Ignition.

LowFire Sw T18 Low Fire Switch. = 1 or 0 Indicates if input is on or off,

HighFireSw T19 High Fire Switch. = 1 or 0 Indicates if input is on or off,

PreIgn ILK T20 or T17a Preignition Interlock = 1 or 0 Indicates if input is on or off,

Valv/Start T21 Interrupted/Intermittent

Pilot Valve, First Stage Oil Valve or Start Input.

Jumper 1 Pilot Flame Establishing Period

(PFEP).

First Safety Time (for RM/EC7850).

Jumper 2 Pilot Valve. INTACT/CLIPPED Display shows state of Pilot

Main Trial Time (for RM/EC7850).

Jumper 3 Start-up Airflow Switch (AFS)

check.

Amp Type Defines type of amplifier

installed.

Flame Response Amplifier Flame Failure

Response Time (FFRT) in seconds.

Purge Time Timing value of purge card. mm:ss Two seconds to 30 minutes.

Preignition Interlock Terminal 17 or 20 is model dependent.

Possible States/

Range (Terminals) Comments

or off, energized or de-energized.

= 1 or 0 Indicates if output terminal is on

or off, energized or de-energized.

energized or de-energized.

= 1 or 0 Indicates if output is on or off,

energized or de-energized.

INTACT/CLIPPED Display shows state of PFEP

jumper. If jumper is intact, 7800 SERIES was 10 second PFEP. If jumper is clipped, 7800 SERIES has 4 second PFEP.

INTACT/CLIPPED Display shows state of First

Safety Time (EC7850) jumper. If jumper is intact, EC7850 has 5 second First Safety Time. If jumper is clipped, the EC7850 has 3 second First Safety Time.

Valve (terminal no. 21). If jumper is intact, RM7800G has Intermittent Pilot Valve. If jumper is clipped, RM7800G has 15 or 30 second Interrupted Pilot Valve.

INTACT/CLIPPED Display shows state of Main Trial

Time (EC7850)Valve (terminal no.

21). If jumper is intact, EC7850 has 5 second Main Trial Time. If jumper is clipped, EC7850 has 3 second Main Trial Time.

INTACT Disabled/CLIPPED Enabled

Display shows state of Start-up AFS check jumper. If jumper is clipped, RM7800 AFS check is enabled and if jumper is intact, AFS check is disabled.

STANDARD/AMPCHECK/SHUTTER

Display shows type of flame detection system installed (i.e., as STANDARD, AMPCHECK/AMPLI-CHECK™ and SHUTTER/ Dynamic SelfChecking).

.8s, 1s, 2s, or 3s —

(continued)

65-0090—39

+ 19 hidden pages