RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES Relay Modules APPLICATION SPECIFICATIONS

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RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES Relay Modules APPLICATION SPECIFICATIONS | Manualzz

RM7800E,G,L,M; RM7840E,G,L,M

7800 SERIES Relay Modules

APPLICATION

The Honeywell RM7800/RM7840 Relay Modules are microprocessor-based integrated burner controls for automatically fired gas, oil, or combination fuel single burner applications. The RM7800/RM7840 Relay Modules are used for UL/CSA On/Off, UL/CSA Modulating, and FM/IRI

Modulating burner applications. The RM7800/RM7840 system consists of a Relay Module. Keyboard Display Modules

(standard with RM7800), Dust Cover (standard with RM7840),

Subbase, Amplifier, and Purge Card. Options include

Personal Computer Interface, DATA CONTROLBUS

MODULE™, Remote Display Mounting, First-Out Expanded

Annunciator and Combustion System Manager™ Software.

Functions provided by the RM7800/RM7840 include automatic burner sequencing, flame supervision, system status indication, system or self-diagnostics and troubleshooting. The RM7800/RM7840 is a solid state replacement for the electromechanical R4140 Automatic

Programming Control.

This document provides installation and static checkout instructions. Other applicable publications are:

65-0084:Q7800A,B 22-Terminal Wiring Subbase Product

Data.

65-0089:ST7800A Plug-In Purge Timer Installation

Instructions.

65-0090:S7800A Keyboard Display Module Product Data.

65-0091:S7810A Data ControlBus Module™ Product Data.

65-0095:S7820 Remote Reset Module Product Data.

65-0097:221729C Dust Cover Packing Sheet.

65-0101:S7830 Expanded Annunciator Product Data.

65-0109:R7824, R7847, R7848, R7849, R7851, R7861,

R7886 Flame Amplifiers for the 7800 SERIES Product

Data.

65-0131:221818A Extension Cable Assembly Product

Data.

65-0228:7800 SERIES Multi-Drop Switch Module Product

Data.

65-0229:7800 SERIES RELAY MODULES Checkout and

Troubleshooting Product Data.

65-0249:S7810M ModBus™ Module Product Data.

INSTALLATION INSTRUCTIONS

SPECIFICATIONS

Electrical Ratings, see Table 3:

Voltage and Frequency: 120 Vac (+10/-15%), 50 or 60 Hz

(±10%).

Power Dissipation: RM7800/RM7840: 10W maximum.

Maximum Total Connected Load: 2000 VA.

Fusing: 15A maximum, Type SC or equivalent Fast Blow.

Environmental Ratings:

Ambient Temperature:

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

Storage: -40°F to +150°F (-40°C to +66°C).

Humidity: 85% relative humidity continuous, noncondensing.

Vibration: 0.5G environment.

Approvals:

Underwriters Laboratories Inc. Listed: File No. MP268,

Guide No. MCCZ.

Canadian Standards Association Certified: LR9S329-3.

Factory Mutual Approved: Report No. J.I.1V9A0.AF.

IRI Acceptable.

Federal Communications Commission, Part 15,

Class B—Emissions.

INSTALLATION

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 the 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.

® U.S. Registered Trademark

Copyright © 2002 Honeywell • All Rights Reserved

66-1085-3

RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES RELAY MODULES

WARNING

Fire or Explosion Hazard.

Can cause property damage, severe injury, or death.

To prevent possible hazardous burner operation, verify safety requirements each time a control is installed on a burner.

WARNING

Electrical Shock Hazard.

Can cause serious injury or death.

Disconnect the power supply before beginning installation. More than one power supply disconnect may be required.

IMPORTANT

1. Wiring connections for the relay modules are unique; therefore, refer to Fig. 2, 3, 4, or the correct

Specifications for proper subbase wiring, and sequence charts.

2. Wiring must comply with all applicable codes, ordinances and regulations.

3. Wiring must comply with NEC Class 1 (Line Voltage) wiring.

4. Loads connected to the RM7800/RM7840 must not exceed those listed on the RM7800/RM7840 label or the Specifications, see Table 1.

5. Limits and interlocks must be rated to simultaneously carry and break current to the ignition transformer, pilot valve, and main fuel valve(s).

6. All external timers must be listed or component recognized by authorities who have jurisdiction for the specific purpose for which they are used.

7. For on-off gas-fired systems, some authorities who have jurisdiction prohibit the wiring of any limit or operating contacts in series between the flame safeguard control and the main fuel valve(s).

8. Two Flame Detectors can be connected in parallel with the exception of Infrared Flame Detectors

(C7015).

9. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may 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 provide reasonable protection against such interference when operated in a commercial environment. Operation of this equipment in a residential area may cause interference; in which case, the users at their own expense may be required to take whatever measures are required to correct this interference.

10.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.

Location

Humidity

Install the relay module where the relative humidity never reaches the saturation point. The relay module is designed to operate in a maximum 85 percent relative humidity continuous, noncondensing, moisture environment.

Condensing moisture may cause a safety shutdown.

Vibration

Do not install the relay module where it could be subjected to vibration in excess of 0.5G continuous maximum vibration.

Weather

The relay module is not designed to be weather tight.

When installed outdoors, protect the relay module using an approved weather-tight enclosure.

Mounting Wiring Subbase

1. Mount the subbase in any position except horizontally with the bifurcated contacts pointing down. The standard vertical position is recommended. Any other position decreases the maximum ambient temperature rating.

2. Select a location on a wall, burner or electrical panel.

The Q7800 can be mounted directly in the control cabinet. Be sure to allow adequate clearance for servicing, installation, access or removal of the

RM7800/RM7840, Expanded Annunciator, Keyboard

Display Module, flame amplifier, flame amplifier signal voltage probes, Run/Test Switch, electrical signal voltage probes and electrical field connections.

3. For surface mounting, use the back of the subbase as a template to mark the four screw locations. Drill the pilot holes.

4. Securely mount the subbase using four no. 6 screws.

Wiring Subbase

WARNING

Electrical Shock Hazard.

Can cause serious injury, death or equipment damage.

Disconnect the power supply before beginning installation to prevent electrical shock, equipment and control damage. More than one power supply disconnect may be required.

1. For proper subbase wiring, refer to Figs. 2, 3, 4 or 5.

2. For proper remote wiring of the Keyboard Display

Module, through a 203541 5-wire Connector, refer to the Specifications for the Keyboard Display Module

(65-0090), Network Interface Unit

(63-2278), Data ControlBus Module™ (65-0091) or

Extension Cable Assembly (65-0131).

3. Disconnect the power supply from the main disconnect before beginning installation to prevent electrical shock and equipment damage. More than one disconnect may be required.

66-1085—3 2

RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES RELAY MODULES

4. All wiring must comply with all applicable electrical codes, ordinances and regulations. Wiring, where required, must comply with NEC, Class 1 (Line Voltage) wiring.

5. Recommended wire size and type: see Table 1.

6. Recommended grounding practices: see Table 2.

The Keyboard Display Module, Data ControlBus Module™

(for remote mounting or communications), through a 203541

5-wire Connector, or Communication Interface ControlBus

Module must be wired in a daisy chain configuration,

(1(a)-1(a), 2(b)-2(b), 3(c)-3(c)). The order of interconnection of all the devices listed above is not important. Be aware that modules on the closest and farthest end of the daisy chain configuration string require a 120 ohm (1/4 watt minimum) resistor termination across terminals 1 and 2 of the electrical connectors, for connections over

100 feet.

7. Recommended wire routing of leadwires: a. Do not run high voltage ignition transformer wires in the same conduit with the flame detector, Data

Controlbus Module™, or Remote Reset Module wiring.

b. Do not route flame detector, Data Controlbus

Module™, or Remote Reset Module leadwires in conduit with line voltage circuits.

c. Enclose flame detector leadwires without armor cable in metal cable or conduit. d. Follow directions in flame detector, Data Controlbus

Module™, or Remote Reset Module Instructions.

8. Keyboard Display Module (KDM): Because 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 Keyboard Display Module is used.

9. Maximum wire lengths follow: a. RM7800/RM7840 leadwires—The maximum length of leadwire is 300 feet to terminal inputs (Control,

Preignition Interlock, Running/Lockout Interlock,

High Fire Switch and Low Fire Switch). b. Flame Detector leadwires—The maximum flame sensor leadwire length is limited by the flame signal strength.

c. Remote Reset leadwires—The maximum length of wire is 1000 feet to a Remote Reset pushbutton.

d. Data Controlbus Module™—The maximum Data

Controlbus Module™ cable length depends on the number of system modules connected, the noise conditions and the cable used. The maximum length of all Data Controlbus Module™ interconnecting wire is 1000 feet.

10. Make sure loads do not exceed the terminal ratings.

Refer to the label on the RM7800/RM7840 or to the ratings in Tables 3, 4 and 5.

Final Wiring Check

1. Check the power supply circuit. The voltage and frequency tolerance must match those of the

RM7800/RM7840. A separate power supply circuit may be required for the RM7800/RM7840. Add the required disconnect means and overload protection.

2. Check all wiring circuits and complete the Static

Checkout, see Table 8, before installing the

RM7800/RM7840 on the subbase.

3. Install all electrical connectors.

4. Restore power to the panel.

Application

Line voltage terminals

Keyboard Display Module (KDM)

Data ControlBus Module™

Remote Reset Module

Communications Interface ControlBus™

Module

13 Vdc full-wave rectified transformer power input.

Table 1. Recommended Wire Sizes and Part Numbers.

Recommended Wire Size

14, 16 or 18 AWG copper conductor, 600 volt insulation, moisture-resistant wire.

Recommended Part Number(s)

TTW60C, THW75C, THHN90C.

Belden 8723 shielded cable or equivalent.

22 AWG two-wire twisted pair with ground, or five wire.

22 AWG two-wire twisted pair with ground, or five wire.

22 AWG two-wire twisted pair, insulated for low voltage.

22 AWG two-wire twisted pair with ground.

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

Belden 8723 shielded cable or equivalent.

Belden 8723 shielded cable or equivalent.

TTW60C, THW75C, THHN90C.

3 66-1085—3

RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES RELAY MODULES

4

CONFIGURATION

JUMPERS

1

L1

(HOT) L2

120 Vac,

50/60 Hz

PLUG-IN PURGE

TIMER CARD

FLAME SIGNAL

L2

TEST

JACK

F

RUN/TEST

SWITCH

RESET

PUSHBUTTON

STATUS LEDs

MICROCOMPUTER

TEST

PLUG-IN

FLAME

AMPLIFIER

RELAY

DRIVE

CIRCUIT

5K

6K

7K

8K

9K

2K

3K

4K

SAFETY RELAY

CIRCUIT

1K

POWER SUPPLY

RELAY

STATUS

FEEDBACK

AND LINE

VOLTAGE

INPUTS

CONTROL

POWER

G

22

20

PRE-IGNITION

INTERLOCK

LIMITS CONTROLLER

RUNNING/

LOCKOUT

INTERLOCK

6

18

LOW FIRE SWITCH

19

HIGH FIRE SWITCH

7

1K1 2K1 5K1

4K1

7K1

2K2

6K1

3K1

DDL

DDL

COMMUNICATIONS

KEYBOARD

DISPLAY MODULE

RS485

1

2

3

REMOTE

RESET

8K1

8K2

9K2

HIGH FIRE

COMMON

MODULATE

9K1

LOW FIRE

12

13

15

14

1 PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

10

8

21

9

5

3

IGNITION

PILOT

PILOT/V2

MAIN VALVE

BLOWER

ALARM

INDICATES FEEDBACK SENSING

OF RELAY CONTACT STATUS

AND LINE VOLT INPUTS

FIELD WIRING

INTERNAL WIRING

M12258

Fig. 1. Internal block diagram of the RM7800L/RM7840L (See Fig. 2, 3, 4 or 5

for individual detailed wiring instructions).

66-1085—3 4

RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES RELAY MODULES

Table 2. Recommended Grounding Practices.

Ground Type

Earth ground (subbase and relay module).

Recommended Practice

1. Use to provide a connection between the subbase and the control panel of the equipment. Earth ground must be capable of conducting enough current to blow the 20A fuse

(or breaker) in the event of an internal short circuit.

Signal ground (KDM, Data ControlBus Module™,

Communications Interface ControlBus™ Module).

2. Use wide straps or brackets to provide minimum length, maximum surface area ground conductors. If a leadwire must be used, use 14 AWG copper wire.

3. Make sure that mechanically tightened joints along the ground path are free of nonconductive coatings and protected against corrosion on mating surfaces.

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 chain to earth ground.

G

7

8

5

6

Earth G

L2(N)

3

4

9

10

16

17

18

19

20

21

F(11)

12

13

14

15

22

Terminal No.

Flame Sensor Ground a

Description

Earth Ground a

Line Voltage Common

Alarm

Line Voltage Supply (L1)

Burner Motor

Burner Controller and Limits

Lockout/Running Interlock

Pilot Valve/Ignition

Main Fuel Valve

Table 3. Terminal Ratings.

Ignition

Flame Sensor

Firing Rate High Fire

Firing Rate Common

Firing Rate Low Fire

Firing Rate Modulate

Unused

Unused

Low Fire Switch Input

High Fire Switch Input

Preignition Interlock Input

Interrupted/Intermittent Pilot Valve/First Stage Oil Valve

Shutter

Ratings

120 Vac, 1A pilot duty.

120 Vac (+10%/-15%), 50 or 60 Hz (±10%) b,d

120 Vac, 9.8 AFL, 58.8 ALR (inrush).

120 Vac, 1 mA.

120 Vac, 8A run, 43A inrush.

120 Vac c

.

120 Vac c

.

120 Vac c

.

60 to 220 Vac, current limited.

120 Vac, 75 VA pilot duty.

120 Vac, 75 VA pilot duty.

120 Vac, 75 VA pilot duty.

120 Vac, 75 VA pilot duty.

120 Vac, 1 mA.

120 Vac, 1 mA.

120 Vac, 1 mA.

120 Vac c

.

120 Vac, 0.5A.

.

a

The relay module must have an earth ground providing a connection between the subbase and the control panel or the equipment. The earth ground wire must be capable of conducting the current to blow the 15A fuse (or breaker) in event of an internal short circuit. The relay module requires a low impedance ground connection to the equipment frame, which, in turn, requires a low impedance connection to earth ground. b

2000 VA maximum connected load to relay module assembly.

c

See tables 4 and 5.

d

RM7800G,M/RM7840G,M operating frequency determined by relay module selection.

5 66-1085—3

RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES RELAY MODULES

5

6

3

4

1

2

7

8

9

Combination No.

A

4.5A ignition.

Table 4. Combinations for Terminals 8, 9, 10 and 21.

Pilot Fuel 8

C

B

No Load

F

No Load

D

No Load

D

No Load

F

F

F

F

F

F

D

D

D

Main 9

A

A

A

Ignition 10

No Load

No Load

A

A

No Load

A

B

Table 5. Explanation of Each Combination.

50 VA Pilot Duty plus

4.5A ignition.

C

180 VA ignition plus motor valve with:

660 VA inrush, 360 VA open, 260 VA hold.

D

2A Pilot Duty.

Intermittent Pilot Valve 21

No Load

No Load

B

No Load

F

No Load

D

No Load

D

F

64 VA Pilot Duty plus motor valves with:

3850 VA inrush, 700 VA open, 250 VA hold.

Mounting RM7800/RM7840

Relay Module (Fig. 5)

1. Mount the RM7800/RM7840 vertically on the Q7800

Subbase, or mount horizontally with the knife blade terminals pointing downward. When mounted on the

Q7800A, the RM7800/RM7840 must be in an electrical enclosure.

2. When mounting in an electrical enclosure, provide adequate clearance for servicing, installation and removal of the RM7800/RM7840, Keyboard Display

Module, flame amplifier, flame amplifier signal voltage probes, electrical signal voltage probes, and electrical connections. a. Allow an additional two inches below the

RM7800/RM7840 for the flame amplifier mounting. b. Allow an optional three-inch minimum to both sides of the RM7800/RM7840 for electrical signal voltage probes.

3. Make sure no subbase wiring is projecting beyond the terminal blocks. Tuck in wiring against the back of the subbase so it does not interfere with the knife blade terminals or bifurcated contacts.

IMPORTANT

The RM7800/RM7840 must be installed with a plug-in motion rather than a hinge action.

4. Mount the RM7800/RM7840 by aligning the four

L-shaped corner guides and knife blade terminals with the bifurcated contacts on the wiring subbase and securely tighten the two screws without deforming the plastic.

66-1085—3 6

RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES RELAY MODULES

120V ALARM

G

Q7800

12

HIGH FIRE

SERIES 90

FIRING RATE

MOTOR

SERIES 90

CONTROLLER

B B

L2

13

COMMON

14

LOW FIRE

3

4 (L1) 15

MODULATE

R

W

R

W

FOR DIRECT SPARK IGNITION (OIL

OR GAS)

10

IGNITION

TRANSFORMER

8 L2

BURNER MOTOR

(BLOWER)

5 16

9

2ND STAGE

FUEL VALVE

(OPTIONAL)

LED

DISPLAY

LOCKOUT INTERLOCKS

(INC. AIR FLOW SWITCH)

10 SEC. INTERRUPTED

PILOT/IGNITION

MAIN FUEL VALVE(S)

5 SECOND IGNITION

(EARLY SPARK

TERMINATION)

FLAME DETECTOR

3

7

8

9

10

F

18

19

20

21

22

LOW FIRE

START SWITCH

HIGH FIRE

PURGE SWITCH

PREIGNITION

INTERLOCK

15 SEC.

INTERRUPTED

PILOT VALVE

MASTER

SWITCH

2

5

L1

(HOT)

L2

1

1 120V, 50/60 Hz POWER SUPPLY. PROVIDE DISCONNECT

MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2

3

RM7800/7840E ONLY: HIGH FIRE PURGE SWITCH

5

SEE FLAME DETECTOR INSTALLATION INSTRUCTIONS

FOR CORRECT WIRING.

4 DO NOT WIRE TO ANY UNUSED TERMINALS.

5 RM7840L1026, RM7800L1053 HAVE INTERMITTENT

PILOT VALVE FUNCTIONS.

M12261C

INITIATE

(INITIAL

POWERUP

ONLY)

POWER

STANDBY

RM7800/RM7840E,L

00

PREPURGE

HOLD

00

DRIVE TO

HIGH FIRE

TIMED

00

PREPURGE

PREPURGE

HOLD

00

DRIVE TO

LOW FIRE

PFEP

10 SEC.

(4 SEC. IF

JR1 CLIPPED

10

POWER POWER POWER POWER POWER

20

MFEP

POWER

25

PILOT

PILOT

FLAME

MAIN

ALARM

PILOT

FLAME

MAIN

ALARM

PILOT

FLAME

MAIN

ALARM

FLAME

MAIN

ALARM

RUN

POWER

00

POSTPURGE

POWER

15

STANDBY

POWER

PILOT

FLAME

MAIN

ALARM

BURNER

BURNER

CONTROLLER/LIMITS

OPERATING

CONTROLS

AND

INTERLOCKS

FLAME

SIGNAL

FIRING

RATE

MOTOR

6 17

4

1

BURNER/BLOWER MOTOR

10 IGN.

5 SEC.

5

10 SEC. IGN./PILOT 8

15 SEC. PILOT 21

2

LIMITS AND BURNER CONTROLLER CLOSED

LOCKOUT INTERLOCKS CLOSED

MAIN VALVE

L1

TO

6

6 TO 7 INTERLOCK. CHECK

PREIGNITION INTERLOCK CLOSED 4 TO 20

1

5 TO 19

SWITCHING

HIGH FIRE SW.

SAFE START CHECK

13

TO

12

MOTOR ACTION

9

LOW FIRE SW.

5 TO 18

FLAME PROVING

13 TO 15

13

TO

14 13

TO

14

PII

IC

SSC

1 FOR THE R7800/R7840E: THE HIGH FIRE SWITCH MUST BE WIRED CORRECTLY TO PERFORM ENERGY SAVING PURGE

FUNCTIONS. THE BURNER/BLOWER MOTOR DOES NOT START UNTIL THE HIGH FIRE SWITCH MAKES.

2

RM7800L1053, RM7840L1026: TERMINAL 21 PROVIDES INTERMITTENT PILOT FUNCTION.

M12263D

Fig. 2. Wiring subbase and sequence for RM7800E,L/RM7840E,L.

7 66-1085—3

RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES RELAY MODULES

66-1085—3

120V ALARM

BURNER MOTOR

(BLOWER)

BURNER

CONTROLLER/LIMITS

RUNNING INTERLOCKS

(INC. AIR FLOW SWITCH)

10 SEC. INTERRUPTED

PILOT/IGNITION

MAIN FUEL VALVE(S)

5 SECOND IGNITION

(EARLY SPARK

TERMINATION)

FLAME DETECTOR

4

G

Q7800

12

HIGH FIRE

SERIES 90

FIRING RATE

MOTOR

B

SERIES 90

CONTROLLER

B

L2

13

COMMON

3

14

LOW FIRE

4 (L1)

15

MODULATE

5

6

7

8

9

10

F

R

W

R

W

16

17

18

4

LOW FIRE

START SWITCH

19

2

JUMPER WIRE FOR 30s MFEP

20

21

22

PREIGNITION

INTERLOCK

15 OR 30 SEC.

INTERRUPTED/

INTERMITTENT

PILOT VALVE

MASTER

SWITCH

L1

(HOT)

L2

1

3

FOR DIRECT SPARK IGNITION

(OIL OR GAS)

10

IGNITION

TRANSFORMER

21

9

1ST STAGE

FUEL VALVE

2ND STAGE

FUEL VALVE

(OPTIONAL)

L2

1 120V, 50/60 Hz POWER SUPPLY. PROVIDE DISCONNECT

MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2

ADD JUMPER FOR 30 SECOND MAIN FLAME

ESTABLISHING PERIOD (MFEP).

3 DO NOT WIRE TO ANY UNUSED TERMINALS.

4

SEE FLAME DETECTOR INSTALLATION INSTRUCTIONS

FOR CORRECT WIRING.

M12260B

LED

DISPLAY

BURNER

OPERATING

CONTROLS

AND

INTERLOCKS

FLAME

SIGNAL

FIRING

RATE

MOTOR

INITIATE

(INITIAL

POWERUP

ONLY)

POWER

STANDBY

POWER

00

TIMED

00

PREPURGE

RM7800G/RM7840G

PREPURGE

HOLD

DRIVE TO

LOW FIRE

00

PFEP

10 SEC.

(4 SEC. IF

JR1 CLIPPED

10 20

MFEP

POWER POWER POWER POWER

25

PILOT

PILOT

FLAME

MAIN

ALARM

PILOT

FLAME

MAIN

ALARM

PILOT

FLAME

MAIN

ALARM

FLAME

MAIN

ALARM

RUN

POWER

00

POSTPURGE

15

STANDBY

POWER POWER

PILOT

FLAME

MAIN

ALARM

5 BURNER/BLOWER MOTOR

10 IGN.

5 SEC.

10 SEC. IGN./PILOT 8

15/30 SEC. INTERRUPTED/INTERMITTENT PILOT VALVE 21

INTERLOCK. CHECK

MAIN VALVE

LIMITS AND BURNER CONTROLLER CLOSED

RUNNING INTERLOCKS CLOSED

L1

TO

6

6

TO 7

PREIGNITION INTERLOCK CLOSED 4 TO

LOW FIRE SW.

20

SAFE START CHECK

RM7800/7840G SWITCHING

13

TO

12

13

MOTOR ACTION

TO 14

9

5 TO 18

FLAME PROVING

13 TO 15

13

TO

14

PII

IC

SSC

M12264A

Fig. 3. Wiring subbase and sequence for RM7800G/RM7840G.

8

RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES RELAY MODULES

G

Q7800

L2

12

13

COMMON

120V ALARM

3

14

4

(L1)

15

MODULATE

2

DAMPER

MOTOR

FOR DIRECT SPARK IGNITION

(OIL OR GAS)

10

IGNITION

TRANSFORMER

21

1ST STAGE

FUEL VALVE

L2

9

2ND STAGE

FUEL VALVE

(OPTIONAL)

BURNER MOTOR

(BLOWER)

BURNER

CONTROLLER/LIMITS

RUNNING INTERLOCKS

(INC. AIR FLOW SWITCH)

10 SEC. INTERRUPTED

PILOT/IGNITION

MAIN FUEL VALVE(S)

5 SECOND IGNITION

(EARLY SPARK

TERMINATION)

FLAME DETECTOR

4

5

6

7

8

9

10

F

16

17

18

19

20

21

22

3

2

2

LOW FIRE

START SWITCH

PREIGNITION

INTERLOCK

INTERMITTENT

PILOT

1

120V, 50/60 Hz POWER SUPPLY. PROVIDE

DISCONNECT MEANS AND OVERLOAD

PROTECTION AS REQUIRED.

2

WHEN NO DAMPER MOTOR OR LOWFIRE

SWITCH IS USED, JUMPER TERMINAL 14

TO TERMINAL 18. DO NOT WIRE TERMINAL 15.

3 DO NOT WIRE TO ANY UNUSED TERMINALS.

4 SEE FLAME DETECTOR INSTALLATION

INSTRUCTIONS FOR CORRECT WIRING.

L1

(HOT)

L2

1

MASTER

SWITCH

M12262A

LED

DISPLAY

BURNER

OPERATING

CONTROLS

AND

INTERLOCKS

FLAME

SIGNAL

DAMPER

MOTOR

INITIATE

(INITIAL

POWERUP

ONLY)

POWER

STANDBY

POWER

00

TIMED

00

PREPURGE

RM7800M/RM7840M

PREPURGE

HOLD

DRIVE TO

LOW FIRE

00

PFEP

10 SEC.

(4 SEC. IF

JR1 CLIPPED

10 20

MFEP

POWER POWER POWER POWER

25

PILOT

PILOT

FLAME

MAIN

ALARM

PILOT

FLAME

MAIN

ALARM

PILOT

FLAME

MAIN

ALARM

FLAME

MAIN

ALARM

RUN

POWER

00 15

POSTPURGE

POWER

STANDBY

POWER

PILOT

FLAME

MAIN

ALARM

BURNER/BLOWER MOTOR

10 IGN.

5 SEC.

10 SEC. IGN./PILOT 8

5

INTERMITTENT PILOT VALVE 21

LIMITS AND BURNER CONTROLLER CLOSED

RUNNING INTERLOCKS CLOSED

MAIN VALVE

L1

TO

6

6

TO 7

9

INTERLOCK. CHECK

PREIGNITION INTERLOCK CLOSED 4 TO

LOW FIRE SW.

20

SAFE START CHECK

RM7800M/7840M SWITCHING

13

TO

15

MOTOR ACTION

5 TO

18

FLAME PROVING

13 TO 15

PII

IC

SSC

M12265A

Fig. 4. Wiring subbase and sequence for RM7800M/RM7840M.

9 66-1085—3

RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES RELAY MODULES

RESET

BUTTON

KEYBOARD

DISPLAY

MODULE

(STANDARD ON

RM7800E,G,L,M)

SEQUENCE

STATUS

LED PANEL

PURGE

TIMER

RELAY

MODULE

WIRING

SUBBASE

RUN/TEST

SWITCH

CONFIGURATION

JUMPERS

POWER

PILOT

FLAME

MAIN

ALARM

RESET

BURNER CONTROL

HONEYWELL

CAPTIVE

MOUNTING

SCREW

FLAME

AMPLIFIER

SCROLL

MODE

- SAVE -

M16353

Fig. 5. RM7800/RM7840 Relay Module exploded view.

SAFETY SHUTDOWN

Safety Shutdown (Lockout) occurs if any of the following occur during the indicated period:

1. INITIATE Period: a. Purge card is not installed or is removed.

b. Purge card is bad.

c. Configuration jumpers are changed (after 200 hours of operation).

d. Ac line power errors occurred, see Operation section.

e. Four minute INITIATE period has been exceeded.

2. STANDBY Period: a. Flame signal is present after 40 seconds.

b. Preignition Interlock is open an accumulative time

of 30 seconds.

c. Interlock check feature is enabled and the

Interlock String (including airflow switch) is closed for 120 seconds with controller closed.

d. Ignition/pilot valve/intermittent pilot valve terminal is energized.

e. Main valve terminal is energized.

f. Internal system fault occurred.

g. Purge card is not installed or is removed.

h. Purge card is bad.

3. PREPURGE Period: a. Preignition Interlock opens anytime during

PREPURGE period (RM7840E,L).

b. Flame signal is detected after first ten seconds during PREPURGE (RM7840E,L).

c. High Fire Switch fails to close within four minutes and fifteen seconds after the firing rate motor is commanded to drive to the high fire position at the start of PREPURGE (RM7840E,L).

d. Low Fire Switch fails to close within four minutes and fifteen seconds after the firing rate motor is commanded to drive to the low fire position at the end of PREPURGE.

e. Running Interlock does not close within 30 seconds

(RM7840G,M).

f. Lockout Interlock does not close within 10 seconds

(RM7840E,L).

66-1085—3 10

RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES RELAY MODULES

g. Lockout Interlock opens during PREPURGE

(RM7840E,L).

h. Ignition/pilot valve/intermittent pilot valve terminal is energized.

i.

Main valve terminal is energized.

j.

Internal system fault occurred.

k. Purge card is removed.

l.

Purge card is bad.

4. PILOT FLAME ESTABLISHING Period (PFEP): a. Low Fire Switch opens.

b. Lockout Interlock opens (RM7840E,L).

c. Ignition/pilot valve/intermittent pilot valve terminal is not energized.

d. Early spark termination terminal is energized after five seconds.

e. No flame is present at the end of PFEP.

f. Main valve terminal is energized (RM7800G,M).

g. Internal system fault occurred.

h. Purge card is removed.

i.

Purge card is bad.

5. MAIN FLAME ESTABLISHING Period (MFEP): a. Low Fire Switch Opens.

b. Lockout Interlock opens (RM7840E,L).

c. Ignition/pilot valve/intermittent pilot valve terminal is not energized.

d. Main valve terminal is not energized.

e. No flame is present at the end of MFEP.

f. Internal system fault occurred.

g. Purge card is removed.

h. Purge card is bad.

6. RUN Period: a. No flame is present.

b. Lockout Interlock opens (RM7840E,L).

c. Interrupted pilot valve terminal is energized

(RM7840G,M).

d. Main valve terminal is not energized.

e. Internal system fault occurred.

f. Purge card is removed.

g. Purge card is bad.

7. POSTPURGE Period: a. Preignition Interlock does not close in five seconds and opens after five-second time period.

b. Ignition/pilot valve/intermittent pilot valve terminal is energized.

c. Main valve terminal is energized.

d. Internal system fault occurred.

e. Purge card is removed.

f. Purge card is bad.

OPERATION

Sequence of Operation

The RM7800/RM7840 has the following operating sequences, see Fig. 2, 3, 4, and Table 6. The RM7800/RM7840 LED provide positive visual indication of the program sequence:

POWER, PILOT, FLAME, MAIN and ALARM.

Initiate

The RM7800/RM7840 enters the INITIATE sequence when the Relay Module is powered. The RM7800/RM7840 can also enter the INITIATE sequence if the Relay Module verifies voltage fluctuations of +10/-15 percent or frequency fluctuations of +/-10 percent during any part of the operating sequence. The INITIATE sequence lasts for ten seconds unless the voltage or frequency tolerances are not met. When the tolerances are not met, a hold condition is initiated and displayed on the VFD for at least five seconds. When the tolerances are met, the INITIATE sequence restarts. If the condition is not corrected and the hold condition exists for four minutes, the RM7800/RM7840 locks out. Causes for hold conditions in the INITIATE sequence: a. AC line dropout is detected.

b. AC line frequency error occurs caused by using a

60 Hz device on a 50 Hz line, or vice versa. c. AC line noise prevents a sufficient reading of the line voltage inputs. d. Low line voltage brownouts occur.

The INITIATE sequence also delays the burner motor starter from being energized and de-energized from an intermittent

AC line input or control input.

Standby

The RM7800/RM7840 is ready to start an operating sequence when the operating control determines a call for heat is present. The burner switch, limits, operating control and all microcomputer monitored circuits must be in the correct state for the RM7800/RM7840 to continue into the PREPURGE sequence.

Normal Start-Up Prepurge

The RM7800/RM7840 provides a prepurge timing selectable from two seconds to 30 minutes with power applied and the

RM7800 operating control indicating a call for heat: a. Running Interlocks, Preignition Interlocks, Burner

Switch, Run/Test Switch, Lockout Interlocks and all microcomputer monitored circuits must be in the correct operating state.

b. The blower motor output, terminal 5, is powered to start the PREPURGE sequence, except for the

RM7800E/RM7840. The firing rate motor is driven to the high fire position. The PREPURGE timing for the

RM7800/RM7840E,L does not begin until the

Lockout Interlock String and High Fire Switch are both closed. The blower motor output for the

RM7800E is not energized until the High Fire Switch is closed. c. The Preignition Interlock input must remain closed throughout PREPURGE; otherwise, control returns to the STANDBY state and holds (30 seconds) for the RM7800/RM7840G,M or safety shutdown for the

RM7800/RM7840E,L occurs. d. The Lockout Interlock or Running Interlock inputs

(interlock circuit including Airflow Switch) must close by ten seconds into PREPURGE; otherwise, a recycle to the beginning of PREPURGE for the

RM7800/RM7840G,M will happen or a safety shutdown for the RM7800/RM7840E,L occurs. e. When PREPURGE timing is complete, the firing rate motor drives to the low fire position,

RM7800/RM7840E,G,L. f. When the firing rate motor reaches low fire position, the Low Fire Switch, terminal 18, input must be energized before entering the Ignition Trial state.

11 66-1085—3

RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES RELAY MODULES

Ignition Trials

1. Pilot Flame Establishing Period (PFEP): a. With the firing rate motor at the low fire position:

(1) The pilot valve and ignition transformer, terminals 8, 10 and 21, are energized. The

RM7800M has an intermittent pilot valve, terminal 21. The RM7800/RM7840G has an interrupted or intermittent pilot valve, terminal

21, depending on the selection of configuration jumper 2. The RM7800/RM7840E,L has a fifteen-second interrupted pilot valve, terminal

21. All of the RM7800/RM7840s have a ten-second interrupted pilot valve/ignition, terminal 8.

(2) During PFEP, the Low Fire Switch must remain closed. If it opens, a safety shutdown occurs.

(3) The Preignition Interlock input is ignored throughout the Ignition Trial state. b. Flame must be proven by the end of the ten-second

PFEP (four if JR1 is clipped) to allow the sequence to continue. If flame is not proven by the end of

PFEP, a safety shutdown occurs. c. After five seconds, the ignition, terminal 10, is de-energized for early spark termination.

2. Main Flame Establishing Period (MFEP): a. Terminal 9 is energized when the presence of flame is verified at the end of a 10-second Pilot Flame

Establishing Period (PFEP) (four seconds if JR1 is clipped).

b. Terminal 8 is turned off 10 seconds after Terminal 9 is energized.

c. Terminal 21 action:

(1) RM7800E,L/RM7840E,L: De-energized

15 seconds after Terminal 9 is energized.

(2) RM7840G:

Run

(a) Not turned off, or

(b)15 seconds after Terminal 9 is energized and

JR2 is clipped, or

(c)30 seconds after Terminal 9 is energized and

Terminals 5 and 19 are jumpered and jumper

JR2 is clipped.

(3) RM7800L1053, RM7840L1026,

RM7800M/RM7840M: Remain energized as long as call for heat is present.

1. A ten-second stabilization period occurs at the beginning of the RUN period.

2. The firing rate motor releases to modulation

(RM7800/RM7840E,G,L). Damper motor is energized

(RM7800/RM7840M).

3. The RM7800/RM7840 is now in RUN and remains in

RUN until the controller input, terminal 6, opens, indicating that the demand is satisfied or a limit opened.

Postpurge

The RM7800/RM7840 provides a fifteen-second

POSTPURGE following the completion of the RUN period.

The blower motor output is powered to drive all products of combustion and any unburned fuel from the combustion chamber. It also supplies combustion air to burn fuel being purged from the fuel line downstream of the fuel shutoff valve.

1. The main fuel valve and intermittent pilot valve,

Terminals 9 and 21, are de-energized and the firing rate motor is commanded to the low fire position to begin the

POSTPURGE period.

2. The Preignition Interlock closes within the first five seconds of POSTPURGE.

Table 6. Sequence Timing for Normal Operation.

Device

RM7800E/

RM7840E

RM7800G/

RM7840G

RM7800L/

RM7840L

RM7800M/

RM7840M

Initiate Standby Purge

10 sec.. * **

Flame Establishing

Period

Pilot Main a

4 or 10 sec.

10 or 15 sec.

10, 15 sec. or intermittent

10 or 15 sec.

b

10 sec. or intermittent

*

Run

Post-

Purge

Timing

Interlock

Circuits

Firing

Rate

Circuit

15 sec. Preignition,

Lockout,

High and

Low Fire

4-wire modulating

Preignition,

Running,

Low Fire

Preignition,

Lockout,

High and

Low Fire

Preignition,

Running,

Low Fire

2-wire isolated

On-Off-On contacts

Energy

Saving

Prepurge

Yes

No

* STANDBY and RUN can be an infinite time period.

**PURGE determined by which ST7800A purge card is selected. a

The MFEP is determined by which terminal is used, configuration jumper selected or jumper wire added.

See Fig. 2, 3, 4, 5 and 6.

b

RM7800L1053, RM7840L1026: 10 second or intermittent.

Approval

Code

Bodies

FM/IRI

Modulating

UL/CSA

Modulating

FM/IRI

Modulating

UL/CSA

On-Off

66-1085—3 12

RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES RELAY MODULES

Keyboard Display Module (VFD)

The Keyboard Display Module (see Fig. 5) is provided with the

RM7800 Relay Module (but is not required for operation) and is an option for the RM7840 Relay Module. The first line of the

Vacuum Fluorescent Display (VFD) 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: T19).

• Lockout information (Lockout, Fault Code, Message and

Sequence).

The extreme right side of the first line is either blank or shows a small arrow pointing to the second line followed by a two-letter code (DI-Diagnostic Information, Hn-Fault History

Information, 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 displays 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 available.

Run/Test Switch

3. In Prepurge Drive to Low Fire position, the Run/Test

Switch, when placed in the TEST position, holds the burner sequence in PREPURGE with the firing rate motor in the Low Fire position.

4. In PFEP, the Run/Test Switch, when placed in the TEST position, stops the timer during the first eight seconds when a ten second PFEP is selected or during the first three seconds when a four second PFEP is selected, allowing pilot-turn-down test and other burner adjustments to be made. This activates a fifteen second flameout timer that permits pilot flame adjustment without nuisance safety shutdowns. The Run/Test

Switch is ignored during PFEP for the RM7800/

RM7840E,L if Terminals 8 and 9 or 9 and 21 are jumpered.

5. During Run, the Run/Test Switch, when placed in the

TEST position, drives the firing rate motor to the Low

Fire position.

NOTE: When RM7800/RM7840 is switched to the Test mode, it stops and holds at the next Run/Test Switch point in the operating sequence. Make sure that the

Run/Test Switch is in the RUN position before leaving the installation.

SETTINGS AND ADJUSTMENTS

Selectable Site-Configurable Jumpers

The RM7800/RM7840 has three site-configurable jumper options, see Fig. 6 and Table 7. If necessary, clip the site-configurable jumpers with side cutters and remove the resistors from the Relay Module.

WARNING

Explosion Hazard.

Can cause serious injury or death.

Do not use the Run/Test switch during the Pilot Flame

Establishing Period for the RM7800/RM7840G,M when using Direct Spark Function, because it turns on the main gas valve, causing an accumulation of fuel in the burner.

The Run/Test Switch is located on the top side of the

RM7800/RM7840, see Fig. 6. The Run/Test Switch allows the burner sequence to be altered as follows:

1. In Prepurge Drive To High Fire Position, the Run/Test

Switch, when placed in the TEST position, holds in

PREPURGE with the firing rate motor in the High Fire position.

2. In the measured PREPURGE sequence, the Run/Test

Switch, when placed in the TEST position, causes the

PREPURGE timing to stop. The firing rate motor is in the High Fire position.

SELECTABLE CONFIGURATION JUMPERS

RUN/TEST SWITCH

NOTE: CONFIGURATION JUMPERS SHOWN FOR RM7800G/RM7840G.

M12301

Fig. 6. Selectable site-configurable jumpers.

13 66-1085—3

RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES RELAY MODULES

Table 7. Site Configurable Jumper Options.

Jumper Number

JR1

JR2

Description

Pilot Flame Establishing

Period (PFEP)

Pilot Valve a

/Main Flame

Establishing Period (MFEP)

Start-up Interlock Check

Intact

10 seconds

10 seconds

Intermittent

4 seconds

Clipped

15 or 30 seconds Interrupted b

RM7800/RM7840 Type

All

RM7800G/RM7840G

JR3 Disabled Enabled All a

Pilot Valve /First Stage Oil Valve (Valve/Start) Terminal 21.

b

A 30 second MFEP can be accomplished by adding a jumper wire between Terminals 19 and 5.

SERVICE NOTE:Clipping and removing a site-configurable jumper enhances the level of safety. Removal after 200 hours of main valve operation will result in a hard lockout, Code 110.

STATIC CHECKOUT

After checking all wiring, perform this checkout before installing the RM7800/RM7840 on the subbase. These tests verify the Q7800 Wiring Subbase is wired correctly, and the external controllers, limits, interlocks, actuators, valves, transformers, motors and other devices are operating properly.

WARNING

Explosion and Electrical Shock Hazard.

Can cause serious injury, death or equipment damage.

1. Close all manual fuel shutoff valve(s) before starting these tests.

2. Use extreme care while testing the system. Line voltage is present on most terminal connections when power is on.

3. Open the master switch before installing or removing a jumper on the subbase.

4. Before continuing to the next test, be sure to remove test jumper(s) used in the previous test.

5. Replace all limits and interlocks that are not operating properly. Do not bypass limits and interlocks.

CAUTION

Equipment Damage Hazard.

Improper testing can damage equipment.

Internal surge protectors can break down and conduct a current, causing the RM7800/RM7840 to fail the dielectric test or possibly destroy the internal lightning and high current protection. Do not perform a dielectric test with the RM7800/RM7840 installed.

Equipment Recommended

1. Voltmeter (1M ohm/volt minimum sensitivity) set on the

0-300 Vac scale.

2. Two jumper wires; no. 14 wire, insulated, 12 inches

(304.8 mm) long with insulated alligator clips at both ends.

General Instructions

1. Perform all applicable tests listed in Static Checkout,

Table 8, in the order listed.

2. Make sure all manual fuel shutoff valve(s) are closed.

3. Perform only those tests designated for the specific

RM7800/RM7840 model being tested.

4. Raise the setpoint of the operating controller to simulate a call for heat.

5. For each test, open the master switch and install the jumper wire(s) between the subbase wiring terminals listed in the Test Jumpers column.

6. Close the master switch before observing operation.

7. Read the voltage between the subbase wiring terminals listed in the Voltmeter column.

8. If there is no voltage or the operation is abnormal, check the circuits and external devices as described in the last column.

9. Check all wiring for correct connections, tight terminal screws, correct wire, and proper wiring techniques.

Replace all damaged or incorrectly sized wires.

10. Replace faulty controllers, limits, interlocks, actuators, valves, transformers, motors and other devices as required.

11. Make sure normal operation is obtained for each required test before continuing the checkout.

12. After completing each test, be sure to remove the test jumper(s).

WARNING

Explosion Hazard.

Can cause serious injury or death.

Make sure all manual fuel shutoff valves are closed before performing static checkout.

66-1085—3 14

RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES RELAY MODULES

2

3

4

1

Test

No.

5

6

7

8

9

10

11

12

13

14

Table 8. Static Checkout.

All

All

RM7800/

RM7840

Models

RM7800E,G,L;

RM7840E,G,L

RM7800E,G,L;

RM7840E,G,L

RM7800E,L;

RM7840E,L

RM7800E,L;

RM7840E,L

RM7800E,G,L;

RM7840E,G,L

4-3

4-5 and

12-13

4-5 and

14-13

4-5 and

12-13

4-5 and

14-13

15-13

Test

Jumpers Voltmeter

None 4-L2

4-5

4-10

4-8

4-21

4-9

6-L2

20-L2

7-L2

18-L2

18-L2

19-L2

19-L2

Normal Operation

Line voltage at Terminal 4.

If Operation is Abnormal,

Check the Items Listed Below

1. Master Switch.

2. Power connected to the Master Switch.

3. Overload protection (fuse, circuit breaker,

etc.) has not opened the power line.

Line voltage at Terminal 6.

1. Limits.

2. Burner Controller.

1. Preignition interlocks.

Line voltage at Terminal 20.

1. Burner motor (fan or

blower) starts.

2. Line voltage at Terminal

7 within 10 seconds.

1. Burner motor circuit.

a. Manual switch of burner motor.

b. Burner motor power supply, overload

protection, and starter.

c. Burner motor.

2. Running or Lockout Interlocks (including

Airflow Switch).

1. Watch for spark or listen for buzz.

a. Ignition electrodes are clean.

b. Ignition transformer is okay.

Ignition spark (if ignition transformer is connected to

Terminal 10)

1. Ignition spark (if ignition

transformer is connected to

Terminal 8).

2. Automatic pilot valve opens (if

connected to Terminal 8).

NOTE: Refer to wiring diagram of system being tested.

1. Watch for spark or listen for buzz.

a. Ignition electrodes are clean.

b. Ignition transformer is okay.

2. Listen for click or feel head of valve for

activation.

a. Actuator if used.

b. Pilot valve.

Same as test no. 6 for connections to Terminal 8. If using direct spark ignition, check the first stage fuel valve(s) instead of the pilot valve.

Same as test no. 6. If using direct spark ignition, check the first stage fuel valve(s) instead of the pilot valve.

Automatic main fuel valve(s) open.

If using direct spark ignition on a model with intermittent pilot on

Terminal 21, check the optional second stage fuel valve, if used.

Alarm (if used) turns on.

1. Listen for and observe operation of the main

fuel valve(s) and actuator(s).

2. Valve(s) and actuator(s).

Firing rate motor drives open; zero volts at Terminal 18 after motor starts driving open.

1. Alarm.

1. Low Fire Start Switch.

2. Firing rate motor and transformer.

Firing rate motor drives closed; line voltage at Terminal 18 after motor is in Low Fire position.

1. Low Fire Start Switch.

2. Firing rate motor and transformer.

Firing rate motor drives open; line voltage at Terminal 19 after motor is in High Fire position.

Firing rate motor drives closed; zero volts at Terminal 19 after motor starts driving closed.

1. High Fire Purge Switch.

2. Firing rate motor and transformer.

1. Low Fire Start Switch.

2. Firing rate motor and transformer.

1. Raise setpoint of Series 90

controller—firing rate motor

should drive toward open.

2. Lower setpoint of Series 90

controller—firing rate motor

should drive toward closed.

1. Series 90 Controller.

2. Firing rate motor and transformer.

15 66-1085—3

RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES RELAY MODULES

Table 8. Static Checkout. (Continued)

Test

15

16

17

No.

RM7800/

RM7840

Models

Test

Jumpers Voltmeter

14-13 — RM7800M;

RM7840M with open damper contacts..

RM7800M;

RM7840M with open damper contacts..

4-5 18-L2

RM7800M;

RM7840M with open damper contacts..

Final All

4-5 and

4-13

18-L2

Normal Operation

If damper motor is used, motor drives damper open.

If damper motor is used, motor drives open; line voltage at

Terminal 18 after motor is in Low

Fire position.

If damper motor is used, motor drives open; zero volts at

Terminal 18.

If Operation is Abnormal,

Check the Items Listed Below

Damper motor.

1. Low Fire Start Switch.

2. Damper motor.

1. Low Fire Start Switch.

2. Damper motor.

CAUTION

Equipment Damage Hazard.

Improper wiring can damage equipment.

On completing these tests, open the master switch and remove all test jumpers from the subbase terminal. Also remove bypass jumpers from the low fuel pressure limits (if used) to prevent equipment damage.

Automation and Control Solutions

Honeywell

1985 Douglas Drive North

Honeywell Limited-Honeywell Limitée

35 Dynamic Drive

Golden Valley, MN 55422 Scarborough, Ontario

M1V 4Z9

66-1085—3 G.R. Rev. 02-02 www.honeywell.com

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