Honeywell Thermostat Rm7800Eglm Rm7840Eglm Users Manual 66 1085 RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES Relay Modules

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INSTALLATION INSTRUCTIONS

66- 1085- 3

® U.S. Registered Trademark

Copyright © 2002 Honeywell • All Rights Reserved

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.

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.

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

66-1085—3 2

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.

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

3 66-1085—3

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.

Table 1. Recommended Wire Sizes and Part Numbers.

Application Recommended Wire Size Recommended Part Number(s)

Line voltage terminals 14, 16 or 18 AWG copper conductor, 600

volt insulation, moisture-resistant wire. TTW60C, THW75C, THHN90C.

Keyboard Display Module (KDM) 22 AWG two-wire twisted pair with

ground, or five wire. Belden 8723 shielded cable or equivalent.

Data ControlBus Module™ 22 AWG two-wire twisted pair with

ground, or five wire. Belden 8723 shielded cable or equivalent.

Remote Reset Module 22 AWG two-wire twisted pair, insulated

for low voltage. —

Communications Interface ControlBus™

Module 22 AWG two-wire twisted pair with

ground. Belden 8723 shielded cable or equivalent.

13 Vdc full-wave rectified transformer

power input. 18 AWG wire insulated for voltages and

temperatures for given application. TTW60C, THW75C, THHN90C.

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

66-1085—3 4

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

for individual detailed wiring instructions).

CONFIGURATION

JUMPERS

MICROCOMPUTER

RESET

PUSHBUTTON

RUN/TEST

SWITCH

STATUS LEDs

PLUG-IN PURGE

TIMER CARD

SAFETY RELAY

CIRCUIT

POWER SUPPLY

KEYBOARD

DISPLAY MODULE

HIGH FIRE

COMMON

MODULATE

LOW FIRE

HIGH FIRE SWITCH

PLUG-IN

FLAME

AMPLIFIER

RELAY

DRIVE

CIRCUIT

CONTROL

POWER

TEST

JACK

REMOTE

RESET

DDL

DDL

COMMUNICATIONS

INDICATES FEEDBACK SENSING

OF RELAY CONTACT STATUS

AND LINE VOLT INPUTS

FIELD WIRING

INTERNAL WIRING

IGNITION

PILOT

PILOT/V2

MAIN VALVE

1K

9K

RELAY

STATUS

FEEDBACK

AND LINE

VOLTAGE

INPUTS

LIMITS CONTROLLER

RUNNING/

LOCKOUT

INTERLOCK

PRE-IGNITION

INTERLOCK

1K1 2K1 5K1

8K1

8K2

9K1

9K2

120 Vac,

50/60 Hz

FLAME SIGNAL

TEST

LOW FIRE SWITCH

PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

RS485

123

L1

(HOT) L2

4

6

20

7

4K1

7K1

2K2

10

8

21

9

18

19

8K

7K

6K

5K

4K

3K

2K

F

G

22

1

BLOWER

6K1

5

ALARM

3K1 3

L2

12

13

15

14

M12258

1

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

5 66-1085—3

Table 2. Recommended Grounding Practices.

Table 3. Terminal Ratings.

.aThe 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.

b2000 VA maximum connected load to relay module assembly.

cSee tables 4 and 5.

dRM7800G,M/RM7840G,M operating frequency determined by relay module selection.

Ground Type Recommended Practice

Earth ground (subbase and relay module). 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.

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 pro-

tected against corrosion on mating surfaces.

Signal ground (KDM, Data ControlBus Module™,

Communications Interface ControlBus™ Module). 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.

Terminal No. Description Ratings

GFlame Sensor Grounda—

Earth G Earth Grounda—

L2(N) Line Voltage Common —

3 Alarm 120 Vac, 1A pilot duty.

4 Line Voltage Supply (L1) 120 Vac (+10%/-15%), 50 or 60 Hz (±10%)b,d

5 Burner Motor 120 Vac, 9.8 AFL, 58.8 ALR (inrush).

6 Burner Controller and Limits 120 Vac, 1 mA.

7 Lockout/Running Interlock 120 Vac, 8A run, 43A inrush.

8 Pilot Valve/Ignition 120 Vacc.

9 Main Fuel Valve 120 Vacc.

10 Ignition 120 Vacc.

F(11) Flame Sensor 60 to 220 Vac, current limited.

12 Firing Rate High Fire 120 Vac, 75 VA pilot duty.

13 Firing Rate Common 120 Vac, 75 VA pilot duty.

14 Firing Rate Low Fire 120 Vac, 75 VA pilot duty.

15 Firing Rate Modulate 120 Vac, 75 VA pilot duty.

16 Unused —

17 Unused —

18 Low Fire Switch Input 120 Vac, 1 mA.

19 High Fire Switch Input 120 Vac, 1 mA.

20 Preignition Interlock Input 120 Vac, 1 mA.

21 Interrupted/Intermittent Pilot Valve/First Stage Oil Valve 120 Vacc.

22 Shutter 120 Vac, 0.5A.

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

66-1085—3 6

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

Table 5. Explanation of Each Combination.

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.

Combination No. Pilot Fuel 8 Main 9 Ignition 10 Intermittent Pilot Valve 21

1 C F No Load No Load

2 B F No Load No Load

3 No Load F No Load B

4F F A No Load

5 No Load F A F

6D F A No Load

7 No Load D A D

8D D A No Load

9 No Load D A D

AB CD F

4.5A ignition. 50 VA Pilot Duty plus

4.5A ignition. 180 VA ignition plus

motor valve with:

660 VA inrush, 360 VA

open, 260 VA hold.

2A Pilot Duty. 64 VA Pilot Duty plus motor

valves with:

3850 VA inrush, 700 VA

open, 250 VA hold.

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

7 66-1085—3

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

M12261C

G

L2

3

4

4 5

5

6

7

8

9

10

F

(L1)

13

14

15

16

17

18

19

20

21

22

12

LOCKOUT INTERLOCKS

(INC. AIR FLOW SWITCH)

MASTER

SWITCH

LOW FIRE

START SWITCH

5 SECOND IGNITION

(EARLY SPARK

TERMINATION)

MAIN FUEL VALVE(S)

BURNER

CONTROLLER/LIMITS

BURNER MOTOR

(BLOWER)

HIGH FIRE

COMMON

LOW FIRE

MODULATE

120V ALARM

10 SEC. INTERRUPTED

PILOT/IGNITION

PREIGNITION

INTERLOCK

SERIES 90

FIRING RATE

MOTOR SERIES 90

CONTROLLER

FLAME DETECTOR

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

MEANS AND OVERLOAD PROTECTION AS REQUIRED.

RM7800/7840E ONLY: HIGH FIRE PURGE SWITCH

CONNECTED TO (L1), NOT .

SEE FLAME DETECTOR INSTALLATION INSTRUCTIONS

FOR CORRECT WIRING.

DO NOT WIRE TO ANY UNUSED TERMINALS.

RM7840L1026, RM7800L1053 HAVE INTERMITTENT

PILOT VALVE FUNCTIONS.

FOR DIRECT SPARK IGNITION (OIL

OR GAS)

IGNITION

TRANSFORMER

2ND STAGE

FUEL VALVE

(OPTIONAL)

R

W

B

R

W

B

L1

(HOT)

L2 1

8

9

10

L2

Q7800

2

15 SEC.

INTERRUPTED

PILOT VALVE

2

5

1

3

4

5

3

HIGH FIRE

PURGE SWITCH

4

RM7800/RM7840E,L

POWER

00

OPERATING

CONTROLS

AND

INTERLOCKS

BURNER

FLAME

SIGNAL

FIRING

RATE

MOTOR

INITIATE

(INITIAL

POWERUP

ONLY)

POWER

STANDBY

POWER

PREPURGE

HOLD

DRIVE TO

HIGH FIRE

PREPURGE

HOLD

DRIVE TO

LOW FIRE

POWER

PILOT

FLAME

MAIN

POWER

PFEP

10 SEC.

(4 SEC. IF

JR1

CLIPPED

PILOT

FLAME

MAIN

POWER

MFEP

PILOT

FLAME

MAIN

RUN

POWER

POSTPURGE

POWER

STANDBY

00 00 10 25 00 1520

SWITCHING

MOTOR ACTION

BURNER/BLOWER MOTOR

IGN.

15 SEC. PILOT

LIMITS AND BURNER CONTROLLER CLOSED

LOCKOUT INTERLOCKS CLOSED

PREIGNITION INTERLOCK CLOSED

LOW FIRE SW.

SAFE START CHECK FLAME PROVING

10 SEC. IGN./PILOT 8

10

5

5 SEC.

21

6

TO

7TO

20TO

518

TO

13 15

TO

13 12

TO

M12263D

INTERLOCK. CHECK

HIGH FIRE SW.

19TO

13 14

TO 13 14

TO

5

4

6

L1

MAIN VALVE 9

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.

RM7800L1053, RM7840L1026: TERMINAL 21 PROVIDES INTERMITTENT PILOT FUNCTION.

1

2

2

1

1

TIMED

PREPURGE

POWER

FLAME

MAIN

PILOT

ALARM

POWER

FLAME

MAIN

PILOT

ALARMALARMALARMALARM

00

IC

PII

SSC

LED

DISPLAY

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

66-1085—3 8

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

RM7800G/RM7840G

POWER

OPERATING

CONTROLS

AND

INTERLOCKS

BURNER

FLAME

SIGNAL

FIRING

RATE

MOTOR

INITIATE

(INITIAL

POWERUP

ONLY)

POWER

STANDBY

PREPURGE

HOLD

DRIVE TO

LOW FIRE

POWER

PILOT

FLAME

MAIN

POWER

PFEP

10 SEC.

(4 SEC. IF

JR1

CLIPPED

PILOT

FLAME

MAIN

POWER

MFEP

PILOT

FLAME

MAIN

RUN

POWER

POSTPURGE

POWER

STANDBY

00 00 10 25 00 1520

MOTOR ACTION

BURNER/BLOWER MOTOR

IGN.

15/30 SEC. INTERRUPTED/INTERMITTENT PILOT VALVE

LIMITS AND BURNER CONTROLLER CLOSED

RUNNING INTERLOCKS CLOSED

PREIGNITION INTERLOCK CLOSED

LOW FIRE SW.

SAFE START CHECK FLAME PROVING

10 SEC. IGN./PILOT 8

10

5

5 SEC.

21

6

TO

7TO

20TO

518

TO

13 15

TO

13 12

TO

M12264A

INTERLOCK. CHECK

13 14

TO 13 14

TO

4

6

L1

MAIN VALVE 9

TIMED

PREPURGE

POWER

FLAME

MAIN

PILOT

ALARM

POWER

FLAME

MAIN

PILOT

ALARMALARMALARMALARM

00

IC

PII

SSC

LED

DISPLAY

RM7800/7840G SWITCHING

M12260B

G

L2

3

4

5

6

7

8

9

10

F

(L1)

13

14

15

16

17

18

19

20

21

22

12

RUNNING INTERLOCKS

(INC. AIR FLOW SWITCH)

MASTER

SWITCH

LOW FIRE

START SWITCH

5 SECOND IGNITION

(EARLY SPARK

TERMINATION)

MAIN FUEL VALVE(S)

BURNER

CONTROLLER/LIMITS

BURNER MOTOR

(BLOWER)

HIGH FIRE

COMMON

LOW FIRE

MODULATE

120V ALARM

10 SEC. INTERRUPTED

PILOT/IGNITION

PREIGNITION

INTERLOCK

SERIES 90

FIRING RATE

MOTOR SERIES 90

CONTROLLER

FLAME DETECTOR

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

MEANS AND OVERLOAD PROTECTION AS REQUIRED.

ADD JUMPER FOR 30 SECOND MAIN FLAME

ESTABLISHING PERIOD (MFEP).

DO NOT WIRE TO ANY UNUSED TERMINALS.

SEE FLAME DETECTOR INSTALLATION INSTRUCTIONS

FOR CORRECT WIRING.

FOR DIRECT SPARK IGNITION

(OIL OR GAS)

IGNITION

TRANSFORMER

2ND STAGE

FUEL VALVE

(OPTIONAL)

R

W

B

R

W

B

L1

(HOT)

L2

1

21

9

10

1ST STAGE

FUEL VALVE L2

Q7800

3

15 OR 30 SEC.

INTERRUPTED/

INTERMITTENT

PILOT VALVE 2

2

1

3

4

4

4

JUMPER WIRE FOR 30s MFEP

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

9 66-1085—3

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

M12262A

G

L2

3

4

5

6

7

8

9

10

F

(L1)

13

14

15

16

17

18

19

20

21

22

12

MASTER

SWITCH

LOW FIRE

START SWITCH

5 SECOND IGNITION

(EARLY SPARK

TERMINATION)

MAIN FUEL VALVE(S)

BURNER

CONTROLLER/LIMITS

BURNER MOTOR

(BLOWER)

COMMON

MODULATE

120V ALARM

10 SEC. INTERRUPTED

PILOT/IGNITION

PREIGNITION

INTERLOCK

FLAME DETECTOR

120V, 50/60 Hz POWER SUPPLY. PROVIDE

DISCONNECT MEANS AND OVERLOAD

PROTECTION AS REQUIRED.

WHEN NO DAMPER MOTOR OR LOWFIRE

SWITCH IS USED, JUMPER TERMINAL 14

TO TERMINAL 18. DO NOT WIRE TERMINAL 15.

DO NOT WIRE TO ANY UNUSED TERMINALS.

SEE FLAME DETECTOR INSTALLATION

INSTRUCTIONS FOR CORRECT WIRING.

FOR DIRECT SPARK IGNITION

(OIL OR GAS)

IGNITION

TRANSFORMER

2ND STAGE

FUEL VALVE

(OPTIONAL)

L1

(HOT)

L2 1

21

9

10

1ST STAGE

FUEL VALVE L2

Q7800

3

INTERMITTENT

PILOT

2

1

3

4

4

RUNNING INTERLOCKS

(INC. AIR FLOW SWITCH)

2

2

2

DAMPER

MOTOR

RM7800M/RM7840M

POWER

PERATING

ONTROLS

ND

NTERLOCKS

URNER

LAME

IGNAL

AMPER

OTOR

INITIATE

(INITIAL

POWERUP

ONLY)

POWER

STANDBY

PREPURGE

HOLD

DRIVE TO

LOW FIRE

POWER

PILOT

FLAME

MAIN

POWER

PFEP

10 SEC.

(4 SEC. IF

JR1

CLIPPED

PILOT

FLAME

MAIN

POWER

MFEP

PILOT

FLAME

MAIN

RUN

POWER

POSTPURGE

POWER

STANDBY

00 00 10 25 00 1520

MOTOR ACTION

BURNER/BLOWER MOTOR

IGN.

INTERMITTENT PILOT VALVE

LIMITS AND BURNER CONTROLLER CLOSED

RUNNING INTERLOCKS CLOSED

PREIGNITION INTERLOCK CLOSED

LOW FIRE SW.

SAFE START CHECK FLAME PROVING

10 SEC. IGN./PILOT 8

10

5

5 SEC.

21

6

TO

7TO

20TO

518

TO

13 15

TO

13 15

TO

M12265A

INTERLOCK. CHECK

4

6

L1

MAIN VALVE 9

TIMED

PREPURGE

POWER

FLAME

MAIN

PILOT

ALARM

POWER

FLAME

MAIN

PILOT

ALARMALARMALARMALARM

00

IC

PII

SSC

ED

ISPLAY

RM7800M/7840M SWITCHING

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

66-1085—3 10

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).

HONEYWELL

POWER

PILOT

FLAME

MAIN

ALARM

RESET

KEYBOARD

DISPLAY

MODULE

(STANDARD ON

RM7800E,G,L,M)

PURGE

TIMER

WIRING

SUBBASE

CAPTIVE

MOUNTING

SCREW

RUN/TEST

SWITCH

CONFIGURATION

JUMPERS

RELAY

MODULE

SEQUENCE

STATUS

LED PANEL

RESET

BUTTON

FLAME

AMPLIFIER

SCROLL MODE

- SAVE -

BURNER CONTROL

M16353

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

11 66-1085—3

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.

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

66-1085—3 12

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:

(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.

Run

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.

* STANDBY and RUN can be an infinite time period.

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

aThe 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.

Device Initiate Standby Purge

Flame Establishing

Period

Run

Post-

Purge

Timing Interlock

Circuits

Firing

Rate

Circuit

Energy

Saving

Prepurge

Approval

Code

BodiesPilot Maina

RM7800E/

RM7840E 10 sec.. * ** 4 or 10

sec. 10 or 15

sec. * 15 sec. Preignition,

Lockout,

High and

Low Fire

4-wire

modulating Yes FM/IRI

Modulating

RM7800G/

RM7840G 10, 15 sec.

or

intermittent

Preignition,

Running,

Low Fire

No UL/CSA

Modulating

RM7800L/

RM7840L 10 or 15

sec.bPreignition,

Lockout,

High and

Low Fire

FM/IRI

Modulating

RM7800M/

RM7840M 10 sec. or

intermittent Preignition,

Running,

Low Fire

2-wire

isolated

On-Off-On

contacts

UL/CSA

On-Off

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

13 66-1085—3

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

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.

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.

Fig. 6. Selectable site-configurable jumpers.

RUN/TEST SWITCH

NOTE: CONFIGURATION JUMPERS SHOWN FOR RM7800G/RM7840G.

SELECTABLE CONFIGURATION JUMPERS

M12301

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

66-1085—3 14

Table 7. Site Configurable Jumper Options.

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

bA 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.

Jumper Number Description Intact Clipped RM7800/RM7840 Type

JR1 Pilot Flame Establishing

Period (PFEP) 10 seconds 4 seconds All

JR2 Pilot Valvea/Main Flame

Establishing Period (MFEP)

10 seconds

Intermittent 15 or 30 seconds InterruptedbRM7800G/RM7840G

JR3 Start-up Interlock Check Disabled Enabled All

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

15 66-1085—3

Table 8. Static Checkout.

Test

No.

RM7800/

RM7840

Models Test

Jumpers Voltmeter Normal Operation If Operation is Abnormal,

Check the Items Listed Below

1 All None 4-L2 Line voltage at Terminal 4. 1. Master Switch.

2. Power connected to the Master Switch.

3. Overload protection (fuse, circuit breaker,

etc.) has not opened the power line.

2 6-L2 Line voltage at Terminal 6. 1. Limits.

2. Burner Controller.

3 20-L2 Line voltage at Terminal 20. 1. Preignition interlocks.

4 4-5 7-L2 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).

5 4-10 — Ignition spark (if ignition

transformer is connected to

Te r m i n a l 1 0 )

1. Watch for spark or listen for buzz.

a. Ignition electrodes are clean.

b. Ignition transformer is okay.

6 All 4-8 — 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.

7 4-21 — 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.

8 4-9 — 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.

1. Listen for and observe operation of the

main

fuel valve(s) and actuator(s).

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

9 4-3 — Alarm (if used) turns on. 1. Alarm.

10 RM7800E,G,L;

RM7840E,G,L 4-5

and

12-13

18-L2 Firing rate motor drives open; zero

volts at Terminal 18 after motor

starts driving open.

1. Low Fire Start Switch.

2. Firing rate motor and transformer.

11 RM7800E,G,L;

RM7840E,G,L 4-5

and

14-13

18-L2 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.

12 RM7800E,L;

RM7840E,L 4-5

and

12-13

19-L2 Firing rate motor drives open; line

voltage at Terminal 19 after motor

is in High Fire position.

1. High Fire Purge Switch.

2. Firing rate motor and transformer.

13 RM7800E,L;

RM7840E,L 4-5

and

14-13

19-L2 Firing rate motor drives closed;

zero volts at Terminal 19 after

motor starts driving closed.

1. Low Fire Start Switch.

2. Firing rate motor and transformer.

14 RM7800E,G,L;

RM7840E,G,L 15-13 — 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.

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

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

Automation and Control Solutions

Honeywell Honeywell Limited-Honeywell Limitée

1985 Douglas Drive North 35 Dynamic Drive

Golden Valley, MN 55422 Scarborough, Ontario

M1V 4Z9

Printed in U.S.A. on recycled

paper containing at least 10%

post-consumer paper fibers.

15 RM7800M;

RM7840M with

open damper

contacts..

14-13 — If damper motor is used, motor

drives damper open. Damper motor.

16 RM7800M;

RM7840M with

open damper

contacts..

4-5 18-L2 If damper motor is used, motor

drives open; line voltage at

Terminal 18 after motor is in Low

Fire position.

1. Low Fire Start Switch.

2. Damper motor.

17 RM7800M;

RM7840M with

open damper

contacts..

4-5

and

4-13

18-L2 If damper motor is used, motor

drives open; zero volts at

Te r m i n a l 1 8 .

1. Low Fire Start Switch.

2. Damper motor.

Final All 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.

Table 8. Static Checkout. (Continued)

Test

No.

RM7800/

RM7840

Models Test

Jumpers Voltmeter Normal Operation If Operation is Abnormal,

Check the Items Listed Below