69 2467EFS—03 R7284B,P,U,G Electronic Oil Primary, EnviraCOM™ Enabled R7184B R7284U1004

User Manual: R7184B

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R7284U1004 Universal Electronic Oil Primary

Electronic Oil Primary with 15 second lock out timing and selectable valve and blower delays

The R7284B,P,U,G Electronic Oil Primary is a line voltage,

safety rated, interrupted and intermittent ignition oil primary

control for residential oil fired burners used in boilers, forced

air furnaces and water heaters.

The R7284U when used with a cad cell flame sensor operates

an oil burner, spark igniter and optional oil valve. The control

works with a low voltage and optional high voltage thermostat.

The primary controls fuel oil, senses flame, controls ignition

spark (either interrupted or intermittent) and notifies through

the EnviraCOM™ bus a remote alarm circuit when in lockout.

The R7284 Series of Oil Primary Controls can be used with both hydronic and forced air systems.

When used with hydronic systems, line voltage switching Aquastat® Controllers normally provide for

the starting and stopping of the combustion sequences. With forced air systems, both mechanical

and electronic low voltage thermostats control the starting and stopping of the combustion process.

PRODUCT SPECIFICATIONS

Description Electronic Oil Primary with selectable 15, 30 or 45 second lock out timing,

selectable valve and blower delays and two line LCD display

Ignition Type Interrupted and Intermittent

Timing, Safety Switch Settable 15, 30 or 45 sec.

Diagnostics Display 2 Line LCD display

Mounting Bracket Junction box on main burner

Electrical Connections Burner motor, oil valve, ignition, cad cell, limit, thermostat, alarm

Electrical Rating;

Contacts (full load)

7.4 A @ 120 Vac; 3.7 a @ 240 Vac

Electrical Rating;

Contacts (locked rotor)

44.4 A @ 120 Vac; 22.2 A @ 240 Vac

Dimensions 4-5/32” L x 4-11/32” W x 2 ½” H

Temperature Range -40°F to +147°F

Approvals UL and cUL Component Recognized

1 OF 2 − ISSUED 12/2010

Leading The Way With Legendary Quality

For decades, Honeywell has set the standard for quality, control and

compatibility. Now we introduce the next generation of oil primaries –

the R7284.

We did the research. We asked owners, managers and technicians how we

could improve our oil primaries and we listened. The result is a digital,

universal primary control engineered to address and anticipate every

industry need, designed to deliver a host of new benefits – it’s the right

part straight out of the back of a truck.

Every setting and diagnostic is on display, in easy-to-read text, on a user-

friendly screen. And the diagnostics offer more than mere data. Users will

benefit from actionable information available in multiple languages,

including English, Spanish and French.

Detailed Diagnostic Information

The “quick-fix” digital display delivers clear data designed to lead you

to any problem, fast. Patent-pending technology determines and

displays why a lockout has occurred, including lack of spark at the

electrode, partially-functioning flame sense, line voltage dips and

more.

Simple, Streamlined Set-Up

We've made this model incredibly easy to operate. Set-up is simpler

than ever, requiring no external tools to access the set-up and

diagnostic features, saving you additional costs. Everything is fully

operational out of the package.

Multi-Faceted Monitoring

The R7284 offers a display that monitors a variety of components

outside of your controller. From cad cell and flame check to the

voltage and the spark of the igniter, you can quickly tell how

everything is functioning and, in case of a failure, which component is

faulty ensuring the right part is fixed the first time.

The Expertise You Trust, The Innovation You Need

There's a reason Honeywell has been an industry standard for oil primary controls. We deliver dependability through

decades of front-line knowledge that result in better design and unmatched support. We're continuing to lead the way

because our engineers keep forging ahead with innovative solutions that bring real-world, day-to-day benefits to every

job. Imagine more control – this model allows you to select 15, 30 or 45-second safety timings. And you can field adjust

valve-on and blower-off delays. Imagine more universality – this model is compatible with virtually all oil-fired appliances

manufactured today. Imagine more ease – every diagnostic and setting is as simple as pushing a button.

Memory and Error History

The R7284 lets you keep track of system quality by accessing memory data that gives a clear picture of day-to-day

performance. The error history capability defines when and how the controller encountered problems, and helps

maintain knowledge when there is more than one technician involved in servicing the unit. There is also a baseline

feature that uses a cycle-trend reading to determine if something is out of the norm, allowing troubleshooting during

service check-ups before a no heat call occurs.

EnviraCOM™ Connection

Honeywell oil primary controls can fully integrate into any EnviraCOM communications system, which allows for remote

monitoring with a simple 3-wire connection.

Additional Features

We've designed this unit with several unique capabilities and features like recessed wiring pocket to allow more space in

tight junction box installations. It's engineered to be unmatched in its compatibility, including working seamlessly with

power venters without integral timers.

2 OF 2 − ISSUED 12/2010

INSTALLATION INSTRUCTIONS

69-2467EFS-03

R7284B,P,U,G

Electronic Oil Primary,

EnviraCOM™ Enabled

APPLICATION

The R7284B,P,U,G Electronic Oil Primary is a line

voltage, safety rated, interrupted and intermittent ignition

oil primary control for residential oil fired burners used in

boilers, forced air furnaces and water heaters. The

R7284B,P,U,G used with a cad cell flame sensor

operates an oil burner, spark igniter, and optional oil

valve. The control works with a low voltage and optional

high voltage thermostat. The primary controls fuel oil,

senses flame, controls ignition spark (either interrupted

or intermittent) and notifies through the EnviraCOM™

bus a remote alarm circuit when in lockout.

The R7284 Series of Oil Primary Controls can be used

with both hydronic and forced air systems. When used

with hydronic systems, line voltage switching Aquastat®

Controllers normally provide for the starting and stopping

of the combustion sequences. With forced air systems,

both mechanical and electronic low voltage thermostats

control the starting and stopping of the combustion

process.

Some hydronic and forced air systems require a delayed

valve-on and burner motor-off delay. The R7284

operates an oil valve that prevents the flow of oil when

the burner motor is running prior to combustion (delayed

valve-on) and when the burner motor is running after

combustion (burner motor-off delay).

The R7284 models are intended for use only on oil

burning appliances which do not require prepurge and

post-purge as a safety related function as defined in

UL296. The valve-on delay and burner motor-off delay in

this control are intended only to help establish draft and

reduce oil after-drip related problems.

EnviraCOM™ enabled R7284’s can be used with

EnviraLink® remote monitoring systems and hand-held

diagnostics. Use only R7284P and U models for

networking with other EnviraCOM™ enabled devices.

FEATURES

User Interface

There are two user interfaces: basic and advanced. Both

interfaces consist of three buttons: , , and “i.”

The advanced interface has a two-line display used to

configure device parameters, retrieve diagnostic

information, and display system status.

The basic interface has a single LED used to display

error codes and system status.

In general, the “i” button cycles through the display

options and acts as an “enter” key (in setup modes).

Thermostat(s)

The oil primaries are compatible with both standard

thermostats and EnviraCOM™ communicating

thermostats.

Limited Recycle

This feature limits the number of recycle trials (for each

call for heat) to a maximum of three trials. If the flame is

lost three times and does not successfully satisfy a call

for heat, the R7284 locks out.

Pump Priming Cycle

To facilitate purging air from the oil lines and filters, the

R7284 can be placed in a purge routine by pressing and

releasing the up arrow button during the Trial For

Ignition.

In the advanced interface “PUMP PRIME” is displayed

on the display along with the time left on the Trial for

Ignition (TFI). Pressing the up arrow button adds a

minute to the TFI time for a maximum of 10 additional

minutes (press the up arrow button 10 times). Pressing

the down arrow button subtracts a minute from the TFI

time.

There is no visual indication for the basic interface

control and the purge timing is limited to five minutes.

Disable Function

Pressing and holding the “i” button will disable all control

functions until 3 seconds after the button is released.

Lockout Modes

The R7284 has three types of lockout modes that are

entered when an error is encountered:

R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED

69-2467EFS—03 2

•Soft Lockout: Caused by a temporary internal error

such as low voltage. The control recovers

automatically after the error is no longer detected.

•Hard Lockout: Caused by a failure internal to the

control or by a system fault such as flame out of

sequence. A Hard Lockout will result in a no heat

condition. To reset from Hard Lockout press and hold

the “i” button for 2 seconds.

•Restricted Lockout: Caused by a number of

consecutive hard lockouts on the same heat cycle. To

reset from a Restricted Lockout press and hold the “i”

button for ten seconds.

Cad Cell Resistance

Cad cell resistance can be checked without using an ohm

meter.

Basic Interface:

Press and release the “i” button. The resulting flashes

indicate the resistance. See Table 3.

Advanced Interface:

The cad cell resistance is shown on the display.

Valve-on Delays/Blower Motor-off

Delays

Select models may have fixed or adjustable delays for

valve open or blower motor off. The safety circuits will

check for flame during these delays and, if a flame is

present, will switch the control to lockout.

SPECIFICATIONS

Models:

Table 1 lists the major features for the R7284.

Timing:

Valve-on Delay: 0–30 seconds

Burner Off Delay: 0–8 minutes

Lockout: 15, 30 or 45 seconds.

Recycle: 60 seconds (fixed).

Ignition Carryover: 10 seconds (fixed).

NOTE: Some models have adjustable Valve-on Delay,

Burner Off Delay, and Lockout timings.

Electrical Ratings:

Inputs:

Voltage: 102 to 132 Vac, 120 Vac nominal.

Current: 0.5A plus burner motor, valve and igniter

loads.

Frequency: 60 Hz.

Outputs:

Relay Contacts:

Burner: 120 Vac, 10 full load amperes (FLA), 60 locked

rotor amperes (LRA).

Valve: 120 Vac, 1A.

Igniter: 120 Vac, 3 A.

Low Voltage Shutdown: 80 Vac

Thermostat Current Available: 100 mA.

EnviraCOM™ Current Available: 150 mA.

NOTE: Reduce burner FLA rating by igniter load. For

example, if the igniter draws 3A (120 Vac, 360

VA), reduce the burner motor FLA to 7A.

Typical Component Wire Color Code:

White: Neutral.

Black: Line.

Orange: Motor.

Blue or Blue w/White Stripe: Igniter.

Violet: Valve.

Red: Limit.

NOTE: The R7284 is provided with 1/4” quick-connect

terminals.

Environmental Ratings:

Operating/Shipping Temperature: -40°F to +150°F

(-40°C to +66°C).

Display text may not be visible below -4°F (-20°C)

Humidity: 0% to 95% relative humidity at 104°F (40°C),

noncondensing.

Accessories:

W8735S3000 Alarm Module

Approvals:

Underwriters Laboratories Inc.: Recognized (File MP268).

Canadian Underwriters Laboratories Inc.

Table 1. R7284 Models.

INSTALLATION

When Installing This Product…

1. Read these instructions carefully. Failure to follow

instructions can damage the product or cause a

hazardous condition.

2. Check ratings given in these instructions and on the

product to make sure the product is suitable for your

application.

3. Make sure the installer is a trained, experienced

service technician.

4. Use these instructions to check out the product

operation after installation.

WARNING

Electrical Shock Hazard.

Can cause severe injury, death or property

damage.

Disconnect power supply before beginning

installation to prevent electrical shock or

equipment damage. More than one disconnect

may be involved.

Model Limit Valve Notes

R7284B No Yes Valve on delay only

R7284G No No No on/off delays, intermittent ignition (wire igniter together with motor)

R7284P Yes Yes On and off delays

R7284U Yes Yes On and off delays

R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED

3 69-2467EFS—03

Location

1. Mount on a 4 in. by 4 in. junction box, directly on the

main burner, or inside the appliance cabinet. In

replacement applications, mount in the same

location as the old control. See Fig. 1. Make sure

the operating temperatures are within the ambient

temperature range (see Specifications section).

2. Before mounting the control, make line voltage con-

nections as shown in Fig. 2 through 10. Splice lines

with solderless connectors. Do not exceed load rat-

ings shown on the device label.

3. If necessary, use the control as a template to mark

and drill new mounting holes.

4. Mount the device using No. 6 screws (not included).

WIRING

WARNING

Electrical Shock Hazard.

Can cause severe injury, death or property

damage.

Disconnect power supply before beginning wiring

to prevent electrical shock or equipment damage.

More than one disconnect may be involved.

1. Make sure wiring complies with all local codes and

ordinances.

2. Check to make sure that line voltage wiring is

properly connected. Refer to oil primary label and

appliance wiring diagram for color codes.

3. After mounting make low voltage connections to the

screw terminals (see Fig. 2 through 10).

4. Strip leads 3/8 in. (10 mm) and insert under terminal

screw.

5. Connect thermostat leads to T-T (or 1, 2, 3 if

EnviraCOM™ is present), if required by installation.

Fig. 1. Mounting R7284 on junction box.

CHECKOUT

Start System

WARNING

Fire or Explosion Hazard.

Can cause severe injury, death or property

damage.

Make sure the combustion chamber is free of oil

and/or oil vapor before starting system.

1. Open hand valve in oil supply line.

2. Make sure system is powered. Check circuit

breaker or fuse and close system switch, if

provided.

3. Set thermostat to call for heat.

4. Make sure burner lights and operates until call for

heat ends. Note cad cell resistance while running.

5. Verify that burner turns off when thermostat call for

heat is satisfied.

Fig. 2. R7284 terminals, connectors, LED, reset button

and DIP switch locations.

Fig. 3. R7284 wiring connections.

R7284

BURNER

M32085

M32146

DISPLAY

DISPLAY

ENVIRACOM

TERMINALS

THERMOSTAT

TERMINALS

ENVIRACOM

DIAGNOSTIC

PLUG

i BUTTON

DOWN

BUTTON

UP BUTTON

ENVIRACOM

TERMINALS

THERMOSTAT

TERMINALS

ENVIRACOM

DIAGNOSTIC

PLUG

i BUTTON

DOWN

BUTTON

UP BUTTON

M32178

CAD CELL CONNECTION

LINE VOLTAGE CONNECTIONS

R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED

69-2467EFS—03 4

Fig. 4. R7284 Limit wiring for line voltage thermostat,

Aquastat, or other Limit.

Fig. 5. R7284 wiring for optional oil valve.

Fig. 6. R7284 igniter wiring.

Fig. 7. Wiring R7284P,U without EnviraCOM™, for

typical oil-fired boiler.

Fig. 8. Wiring R7284U without EnviraCOM™, for

typical oil-fired boiler.

R7284P, U

L1

L1

LIMIT

R7284B, G

L1 AQUASTAT

OR OTHER

LIMIT

L1

……

……

AQUASTAT

OR OTHER

LIMIT

M32179

VALVE

R7284B, P, U

BURNER

MOTOR

L2

R7284A, G

BURNER

MOTOR

L2

……

……

BURNER

MOTOR

BURNER

MOTOR

VALVE VALVE

M32180

R7284B, P, U

L2

IGNITER

IGNITER

INTERRUPTED IGNITION

INTERMITTENT IGNITION

R7284G

BURNER

MOTOR

L2

IGNITER

INTERMITTENT

IGNITION

……

……

BURNER

MOTOR BURNER

MOTOR

BURNER

MOTOR

M32181

L2

POWER SUPPLY. PROVIDE DISCONNECT MEANS

AND OVERLOAD PROTECTION AS REQUIRED.

REFER TO DEVICE LABEL FOR WIRE COLOR CODE.

VALVE IS OPTIONAL ON SPECIFIC MODELS.

ENVIRACOM™ TERMINAL 3 IS ALSO THE FIRST THERMOSTAT TERMINAL.

THE JUMPER MAY BE OMITTED IF THE R7284 IS CONFIGURED TO IGNORE

THE TT TERMINALS.

1

R7284

IGNITER

M32182

L1

1

CAD

CELL

2

3

4

5

3

4

5

2

2

2

BURNER

MOTOR

CIRCULATION

PUMP

L2

B2

C2

C1

BURNER

MOTOR

IGNITER

VALVE

VALVE

CAD

CELL

L1

B1

LIMIT

JUNCTION

BOX

T

T

3

2

1

T

T

LEGEND: SCREW TERMINAL 1/4 IN. QUICK CONNECT TERMINAL

SOLDERLESS WIRE CONNECTOR

THERMOSTAT

L8148A,C

JUMPER

AQUASTAT®

CONTROLLER

R

W

ENVIRACOM™

TERMINAL

L2

POWER SUPPLY. PROVIDE DISCONNECT MEANS

AND OVERLOAD PROTECTION AS REQUIRED.

REFER TO DEVICE LABEL FOR WIRE COLOR CODE.

ENVIRACOM™ TERMINAL 3 IS ALSO THE FIRST THERMOSTAT TERMINAL.

THE JUMPER MAY BE OMITTED IF THE R7284 IS CONFIGURED TO IGNORE

THE TT TERMINALS.

1

R7284

IGNITER

M32191

L1

1

CAD

CELL

2

3

4

3

4

2

2

2

BURNER

MOTOR

CIRCULATION

PUMP

L2

B2

C2

C1

BURNER

MOTOR

IGNITER

VALVE

CAD

CELL

L1

B1

LIMIT

JUNCTION

BOX

T

T

3

2

1

T

T

LEGEND: SCREW TERMINAL 1/4 IN. QUICK CONNECT TERMINAL

SOLDERLESS WIRE CONNECTOR

THERMOSTAT

L8148A,C

JUMPER

AQUASTAT®

CONTROLLER

R

W

ENVIRACOM™

TERMINAL

R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED

5 69-2467EFS—03

Fig. 9. Wiring R7284P,U with EnviraCOM™

connections, for typical oil-fired boiler.

Fig. 10. Typical wiring diagram for EnviraCOM™

enabled thermostat and R7284P,U for an

oil-fired forced-air system.

IMPORTANT

System as shown in Fig. 10 is phase/polarity

sensitive. Make sure all input power is in the

same phase.

L2

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

PROTECTION AS REQUIRED.

REFER TO DEVICE LABEL FOR WIRE COLOR CODE.

VALVE IS OPTIONAL ON SPECIFIC MODELS.

ENVIRACOM™ TERMINAL 3 IS ALSO THE FIRST THERMOSTAT TERMINAL.

1

R7284

IGNITER

M32183

L1

1

CAD

CELL

2

3

3

4

4

2

2

2

BURNER

MOTOR

L2

B2

BURNER

MOTOR

IGNITER

VALVE

VALVE

CAD

CELL

L1

B1

LIMIT

JUNCTION

BOX

T

T

3

2

1

12T/3

1 2 3

LEGEND: SCREW TERMINAL 1/4 IN. QUICK CONNECT TERMINAL

SOLDERLESS WIRE CONNECTOR

L7224/48

TH9421C

VisionPRO IAQ

AQUASTAT®

CONTROLLER

ENVIRACOM™

TERMINAL

T

POWER SUPPLY. PROVIDE DISCONNECT MEANS

AND OVERLOAD PROTECTION AS REQUIRED.

REFER TO DEVICE LABEL FOR WIRE COLOR CODE.

VALVE IS OPTIONAL ON SPECIFIC MODELS.

FACTORY INSTALLER JUMPERS.

ENVIRACOM™ TERMINAL 3 IS ALSO THE FIRST THERMOSTAT TERMINAL.

1

M32184

2

3

4

5

LEGEND: SCREW TERMINAL 1/4 IN. QUICK CONNECT TERMINAL

SOLDERLESS WIRE CONNECTOR

L2

R7284

IGNITER

L1

HOT

1

2

2

CAD

CELL

BURNER

MOTOR

L2

BURNER

MOTOR

IGNITER

CAD

CELL

L1

JUNCTION

BOX

T

T3

2

1

LIMIT

LIMIT

VALVE

L1

(HOT)

L2

COOL 1

RELAY

FAN

RELAY

OT

OT 2

1 3

C7089B

OUTDOOR

TEMPERATURE

SENSOR

T

863

5L

W8635A

C

R

RH

RC

1

2

3

Y2

W2

Y1

G

W1

COOL 2

RELAY

4

SYSTEM

TRANSFORMER

1

3

5

ENVIRACOM™

TERMINAL

VALVE

2

R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED

69-2467EFS—03 6

ADVANCED USER INTERFACE

Fig. 11. User interface overview.

Home Screens

Pressing the “i” button longer than 2 seconds in states

other than Standby Interrupts control operation.

Once the held key is released the count down begins.

• Holding all 3 buttons longer than 2 seconds in any

state goes to Installer Setup (ISU).

• Pressing “i” in any state enters the Diagnostic screen

(if diagnostics are enabled).

• Pressing up or down in any screen enters Error History

(if diagnostics are enabled).

Below is a typical progression of screens through a

normal cycle.

Pressing up or down during the

Ignition Trial enters pump prime.

Each press of the up button adds a

minute, each press of the down

button subtracts a minute from the

pump prime time.

If at any point there is an event generating a lockout, one

of the following screens will be displayed.

Control is in Soft Lockout. Control will

recover when error clears or after

specified time.

Control is in Hard Lockout. Hold “i” for

at least 2 seconds to reset.

Hold the “i” button longer than 10

seconds to return to Standby.

Installer Setup

Installer setup is entered by pushing all three buttons

simultaneously for 2 seconds.

If QUIT is selected, an “i” button press

displays the Re-baseline option.

If CONT is selected, an “i” button

press goes to “Installer Setup”.

NOTE:Not all parameters are adjust-

able in all models. Parameters not available for

adjustment will display “Locked” when an

attempt is made to modify them.

Select between English, French, or

Spanish by using the up or down

buttons and the “i” button to select

Adjustment of the Valve On Delay in

five second increments.

Ignition (lockout) Time adjustment.

NOTE: The Ignition Time is only available for adjustment

during the first 100 cycles of operation. After 100

cycles the Ignition Time is locked in and can no

longer be adjusted.

M32103A

i

i

i

i

i

i

i

i

i

i

UP/DOWN

UP/DOWN

i

(EXIT SELECTED)

HOLD ALL

3 BUTTONS

ERROR HISTORY

HOME SCREEN

CAD CELL HISTORY

CYCLE COUNTS

IGNITION TIME

HISTORY INSTALLER SETUP

SCREENS

i

(CONT. SELECTED)

i

(NO SELECTED)

i

(YES SELECTED)

R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED

7 69-2467EFS—03

Adjustment of the Burner Off Delay.

Configuration of the TT terminals vs.

an “internal jumper.”

Controls sparking during On Delay

period.

Controls sparking during Run mode

(Interrupted vs. Intermittent ignition).

Number of resets allowed before

Restricted Lockout

Appliance configuration (boiler,

furnace, water heater) for

EnviraCOM™.

Enable advanced diagnostics mode

and error history.

Exit installer setup

If “QUIT” is selected, the user is

prompted with a screen asking if it is

desired to re-baseline the control.

Baselining the control is intended as a means to save

performance data at the time when the control is

operating optimally. The baseline values are a “trend” of

the first 500 cycles following an installation or a command

to “re-baseline” and is provided as a method to compare

present burner performance to that when the burner was

initially installed or serviced. Using the baseline data, it is

possible to monitor the burner system for degradation and

allow a service person to address any issues before they

result in a no-heat situation. After performing the service it

may be desired to reset the baseline through the installer

setup menu.

NOTE: Re-baselining will establish new baseline values

for CAD cell and Ignition Time going forward. It

will also reset the “Cycles Since Baseline”,

“Lockouts Since Baseline”, and “Recycles Since

Baseline” counters back to zero.

Displays the status of the TT and

Limit inputs. Note that “TT Remote”

means EnviraCOM™ is commanding

the R7284 to behave opposite the

status of the TT terminals.

Press “i” to go to the next screen

Current value of the CAD cell. Press

“i” to go to the next screen

If NO is selected, “i” returns to the

home screen

If YES is selected, “i” continues

through diagnostic screens.

The history screens can provide useful information about

the controls past performance, including its recent history

such as cycle trends (using the baseline function) and

total cycles since installation.

View History

From the Diagnostic screen scroll to the View History

screen and select YES. Scroll through the performance

data by using the up or down buttons.

The CAD Cell screen automatically

scrolls 4 screens.

Average CAD cell value during last

cycle

CAD cell trend over the last 10 cycles.

CAD cell trend over the first 500

cycles

Pressing “i” during any of the CAD cell screens moves to

the Ignition Time screens below.

The Ignition Time screen

automatically scrolls through 4

screens.

Last Ignition Time.

Ignition Time trend over the last 10

cycles. Ignition

Time trend over the first 500 cycles.

Pressing “i” during any of the ignition time screens moves

to the Cycle Count screen below.

Total burner cycles.

Burner cycles since last service

(baseline reset).

Flame losses since last service

(baseline reset).

Ignition failures since last service

(baseline reset).

The next press goes back to the View History screen

where the user can exit to the home screen or loop back

through the performance history again.

Error History Screens

For all Error History screens, pressing “i” returns to the

Normal Screen.

From the home screen, press the up button to display

most recent error.

Press the up button again to proceed to the next most

recent error or the down button to return to the previous

error screen.

These three screens transition every 3 sec.

If no more errors are logged, the display shows “Error

History End.”

R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED

69-2467EFS—03 8

BASIC USER INTERFACE

The basic user interface consists of 3 buttons and an

LED. Simple diagnostic information can be obtained

through the interaction of the buttons and LED.

R7284 Status (Basic Interface)

R7284 Flame Strength

(Basic Interface)

During normal operation and when the R7284 is in the

Running state, the LED will show CAD cell resistance.

See Table 3.

Error History (Basic Interface)

The last two errors are available for display on the LED:

• Pressing the up arrow button displays the most recent

error.

• Pressing the down arrow button displays the next most

recent error.

Once the up or down arrow is pushed, the LED will

display the most recent or next most recent alarm by

blinking the error code. See Table 4.

R7284 Error Codes

(Basic Interface)

TROUBLESHOOTING AND

MAINTENANCE

IMPORTANT

Due to the potential hazard of line voltage, only a

trained, experienced service technician should

preform the troubleshooting procedures.

This control contains no field-serviceable parts.

Do not attempt to take it apart. Replace entire

control if operation is not as described.

To completely troubleshoot an oil burner installation,

check the burner and oil primary control for proper

operation and condition.

Cad Cell Resistance Check

For proper operation, it is important that the cad cell

resistance is below 1600 ohms. On the basic model with

LED interface, during a normal call for heat, once the

control has entered the Run mode, press and release the

“i” button.

On the advanced model with display, follow the screen

diagnostic procedure to read the cad cell resistance.

Preliminary Steps

1. Check wiring connections and power supply.

2. Make sure power is on to controls.

3. Make sure limit control is closed.

4. Check contacts between igniter and the electrodes.

5. Check the oil pump pressure.

6. Check the piping to the oil tank.

7. Check the oil nozzle, oil supply and oil filter.

Check Oil Primary Control

If the trouble is not in the burner or ignition hardware,

check the oil primary control by using the following

equipment:

1. Screwdriver.

2. Voltmeter (0 to 150 Vac range).

3. Insulated jumper wire with both ends stripped.

WARNING

Electrical Shock Hazard.

Can cause severe injury, death or property

damage.

Troubleshoot with the system powered. Be careful

to observe all precautions to prevent electrical

shock or equipment damage.

Table 2. LED Codes.

Description LED Code

Standby Pulse (1/4 sec. ON, 4 sec OFF)

Call for Heat Heartbeat (1/2 sec bright, 1/2 sec dim)

Flame proven On solid

Recycle 2 second ON, 2 second OFF flashing

Lockout 1/2 second on, 1/2 second OFF flashing

Interrupt OFF

“i” button Flame Strength Indication

Up button Most recent error

Down button Next most recent error

Table 3. Flame Strength Indication.

Flame Strength Indication Number of 1/2 sec flashes

Cad Cell less than 400Ω1

400Ω < Cad Cell < 800Ω2

800Ω < Cad Cell < 1600Ω3

1600Ω < Cad Cell < 6100Ω4

Cad Cell > 6100ΩNone

Table 4. Error Codes.

Error Codes

Number of 1/4 sec

flashes

No ignition / Late ignition 1

Max flame losses / Cad Cell high

while running

2

Flame out of sequence 3

Low Voltage / EnviraCOM™ error 4

Internal Error 5

R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED

9 69-2467EFS—03

Table 5. R7284 Operation.

External Action R7284 Action

Power applied to control. Internal safety check conducted. If no light or flame is detected and all internal

conditions are correct, control enters Standby Mode.

Thermostat or Aquastat® Control

calls for heat.

1. Safety Period (5 seconds) internal and external check for flame or light. If

flame or light is detected, control remains in the Standby Mode.

2. When flame or light is not present:

a. R7284G will apply power to the burner motor and igniter.

b. R7284B,P,U (if valve-on delay is enabled) will apply power to the burner

motor and igniter, (if configured) enter/complete valve-on delay period

and then apply power to the valve.

3. Control enters Trial for Ignition period.

a. Monitors burner for flame.

b. When flame is not detected:

(1) Enters lockout mode (after lockout time of 15, 30, or 45 seconds).

(2) Shuts off valve, igniter and burner motor.

(3) Display models: display Lockout mode. LED models: flash LED 1/2

sec ON, 1/2 sec OFF.

(4) Depress “i” button for 2 seconds to return to power-up sequence.

c. When flame is detected, Carry-Over period begins:

4. Control enters Ignition Carry-Over period (continues to spark for 10 seconds

in interrupted mode).

a. Display models: display “Flame Proven.” LED models: turns on LED

b. If flame is lost and lockout time has not expired, R7284 returns to Trial for

Ignition period.

c. If flame is lost and lockout time has expired, R7284 enters Recycle Mode.

5. Carry-Over time expires; igniter turns off if interrupted ignition.

6. Enters Run Mode:

a. Flame is monitored until call for heat ends or flame is lost. If flame is lost:

(1) Control enters Recycle Mode.

(2) Recycle time starts (60 seconds).

(3) Burner and valve are turned off.

(4) Display models: display “Recycle.” LED models: flash LED 2 sec ON,

2 sec OFF.

(5) Returns to Idle Mode at end of Recycle Mode.

Call for heat is satisfied. 1. R7284B,G,P,U (if burner motor-off delay is disabled):

a. Burner motor and optionally oil valve and igniter shut off.

b. Display models: display “Standby”

LED models: LED turns OFF

c. Indicator light turns off.

2. R7284P,U (if burner motor-off delay is enabled):

a. Oil valve shuts off.

b. Burner motor runs for selected burner motor-off delay time.

c. Burner motor turns off.

d. Device returns to Idle Mode.

Reset control three times without

completing a call for heat

(number of resets is adjustable in

some controls)

1. R7284 enters Restricted Mode.

2. Indicator light flashes and 1/2 second on, 1/2 second off.

3. Display models: display “Hard Lockout Call Service”

LED models: flash LED 1/2 second ON, 1/2 second OFF

4. Reset device by pressing and holding reset button for a minimum of 10

seconds.

R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED

69-2467EFS—03 10

Table 6. Troubleshooting Information.

Condition: Burner does not start with a call for heat

Procedure Control Status Corrective Action

Review error history if

control in lockout

-- Refer to Error Codes table of this section

Check that limit switches

are closed

Display models: display shows status

of limit switch.

Replace limit switch or clean contacts.

Check TT status Display models: display shows status

of TT.

•Most hydronic systems require TT to be

jumpered. Display models can be configured

to behave as though the TT terminals are

jumpered. LED models require a jumper be

added.

•Warm air systems will short TT terminals

during a call for heat. Check that TT is really

shorted during the call for heat.

Check for line voltage

power at R7284

-- Check breaker and investigate appliance wiring

Check status of cad cell Display models: display shows cad

cell resistance.

LED models: LED is on if cad cell is

too low to start.

•Replace cad cell

•If operation does not resume, remove

leadwires from R7284.

•If operation does not resume, replace control.

Condition: Burner does not stop when call for heat ends

Procedure Control Status Corrective Action

Check TT status Display models: display shows status

of TT.

•Check if a TT jumper is installed.

•Check if the R7284 is configured to ignore the

TT terminals.

•Verify thermostat contacts have opened.

There should be 24VAC across TT terminals

when there is not call for heat.

Check limit status Display models: display shows status

of limit.

Measure voltage on Limit terminal. There should

be no voltage between Limit and Neutral when

the contacts are open. Replace limit switch if

necessary.

Check if other EnviraCOM

devices are commanding

the R7284 to run

Display models: display shows "TT

Remote" if an EnviraCOM device is

commanding it to run.

Unplug all EnviraCOM devices from R7284. It

should turn off within 5 minutes.

Table 7. Display Alarm Information.

Display Alarm

EnviraCOM™

Alarm

Number Corrective Action

No Ignition

Check Igniter

10 •The burner was not lit and spark was not detected. Check the

electrodes, spring contacts (or high voltage wires), and ignition

transformer for proper operation.

•If spark ignition is functioning acceptably, proceed to “No Ignition”

corrective action.

No Ignition

Check Cad Cell

5•The cad cell detected some amount of light during the ignition trial, but

not enough to enter run mode. Check the cad cell positioning and clean

the eye.

•Set the display to show the cad cell resistance.

•Shield the cad cell from light.

•If the display shows is less than 20,000 ohms, unplug the cad cell.

— If the display does not read 999999 ohms, replace control

— If it does read 999999 ohms, replace cad cell.

•Expose the cad cell to ambient light (generally enough light to read by

is adequate)

•If the display shows more than 2000 ohms, short the cad cell terminals.

— If the display shows more than 5 ohms, replace control

— If less than 5 ohms, replace cad cell.

•If the burner still does not light, proceed to “No Ignition” corrective

action.

R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED

11 69-2467EFS—03

No Ignition 20 •Check that the manual shut off valve is open.

•Check that the burner motor is spinning and the pump is generating

adequate pressure.

•Check the condition of the nozzle and replace if necessary.

•If a valve is present, check for proper operation.

•Check burner adjustments (refer to burner manufacturers instructions)

Low Voltage

XX% low

59 •Supply voltage is low to the control.

•Measure the voltage across screw terminals “2” and “3”

— If it's greater than 22VAC and the error does not clear, replace

control.

— If it's less than 22VAC, review appliance wiring.

Internal Error 18, 58 •An error has been detected inside the control. Replace control if the

error persists.

Flame Proven

Out of Sequence

34 •The cad cell is permanently in a low resistance state. It should typically

read much higher than 20,000 ohms when no flame is present.

•Set the display to display cad cell resistance.

•Shield the cad cell from light.

•If the display shows less than 20,000 ohms, unplug the cad cell,

— If display does not read 999999 ohms, replace control.

— If it does read 999999 ohms, replace cad cell.

Flame Proven

During On Delay

23 •Flame was proven during the valve on delay period. Check the oil valve

for proper operation.

•If the system does not have an oil valve, set the valve on delay to 0.

Flame Proven

During Off Delay

24 •Flame remained lit during the burner off delay. Check the oil valve for

proper operation.

•If the system does not have an oil valve, set the burner off delay to 0.

Exceeded Max Recycles 22 •Flame was lost more than the allowed number of times. The burner

lights, but does not remain lit.

•Check that the fuel tank is not empty.

•Check the fuel supply lines (and filter) for obstructions or air

— Use the pump priming feature to purge the system of airCheck

•Check that the burner motor is spinning and the pump is generating

adequate pressure.

•If present, check operation of the oil valve.

•If the problem persists, proceed to the “Cad Cell, High During Run”

corrective action.

EnviraCOM™ Error 91 •Communications error has been detected.

•Remove all devices from the EnviraCOM™ connections, 3-pin plug

and screw terminals “1-2-3”.

— If the error does not clear within one minute, measure the voltage on

terminals “2” and “3”.

— If the voltage across terminals “2” and “3” is between 20VAC and

30VAC, replace control.

— If it is outside of that range, review appliance wiring. There should

be approximately 24VAC across “2” and “3”.

Cad Cell

High During Run

4•The cad cell resistance is higher than normal while running, the system

is in need of a tune up.

•Check for proper alignment of the cad cell and clean the eye if

necessary.

•Check if the pump is generating adequate pressure.

•Check burner adjustments (refer to burner manufacturers instructions).

•Check for excessive soot build up in the burner and flue.

•Check for flue blockage.

Flame Proven

Late in Trial

9•The burner lit very late during the trial for ignition and is susceptible to

not lighting.

•Check cad cell for proper alignment and clean if necessary.

•Check burner adjustments (refer to burner manufacturers instructions)

•Check electrodes and spring contacts (if equipped) and adjust per

manufacturers recommendations.

•Check if the pump is generating adequate pressure.

•Check the fuel supply lines and filter for obstructions.

Table 7. Display Alarm Information.

R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED

Automation and Control Solutions

Honeywell International Inc.

1985 Douglas Drive North

Golden Valley, MN 55422

Honeywell Limited-Honeywell Limitée

35 Dynamic Drive

Toronto, Ontario M1V 4Z9

customer.honeywell.com

® U.S. Registered Trademark

© 2010 Honeywell International Inc.

69-2467EFS—03 M.S. Rev. 09-10

Printed in U.S.A.

Table 8. LED Flash Codes.

LED

Flash

Code

EnviraCOM™

Alarm

Number Corrective Action

1 10,5,20,59,9 The burner was not lit or lit near the end of the trial time.

•Check that the manual shut off valve is open.

•Check that the burner motor is spinning and the pump is generating adequate pressure.

•Check the condition of the nozzle and replace if necessary.

•Check the fuel supply lines and filter for obstructions or air.

•Check the electrodes, spring contacts (or high voltage wires), and ignition transformer for

proper operation.

•If a valve is present, check for proper operation.

•Check burner adjustments (refer to burner manufacturers instructions) and spark was not

detected.

•Check the cad cell positioning and clean the eye.

•Expose the cad cell to ambient light (generally enough light to read by is adequate)

— If the LED does not turn on, short the cad cell terminals,

— If the LED does not turn on, replace the control,

— If the LED turns on, replace the cad cell.

•Shield the cad cell from light.

— If the LED does not turn off, unplug the cad cell,

— If the LED does not turn off, replace the control,

— If the LED turns off, replace the cad cell.

2 22,4 Flame was lost more than the allowed number of times. The burner lights but does not remain

lit, or the cad cell is unusually high during a run cycle.

•Check that the fuel tank is not empty.

•Check the fuel supply lines (and filter) for obstructions or air

use the pump priming feature to purge the system of air

•Check for proper alignment of the cad cell and clean the eye if necessary.

•Check the burner motor is spinning and the pump is generating adequate pressure.

•If present, check operation of the oil valve.

•Check burner adjustments (refer to burner manufacturers instructions).

•Check for excessive soot build up in the burner and flue.

•Check for flue blockage.

3 23,24,34 Flame was detected out of sequence.

•Check the oil valve for proper operation (if equipped).

•Expose the cad cell to ambient light (generally enough light to read by is adequate)

— If the LED does not turn on, short the cad cell terminals,

— If the LED does not turn on, replace the control,

— If the LED turns on, replace the cad cell.

•Shield the cad cell from light.

— If the LED does not turn off, unplug the cad cell,

— If the LED does not turn off, replace the control,

— If the LED turns off, replace the cad cell.

4 59,91 •Supply voltage was low to the control or a communication error has occurred.

•Remove all devices from the EnviraCOM™ connections, 3-pin plug and screw terminals

“1-2-3”.

— Measure the voltage across screw terminals “2” and “3”

If it's between 22VAC and 30VAC and the error does not clear, replace control.

— If it's outside that range, review appliance wiring. There should be approximately 24VAC

across “2” and “3”.

5 18, 58 An error has been detected inside the control. Replace control if the error persists.