Installation Guide

ManualsBrandsHoneywell ManualsHydronic Baseboard Heater AccessoriesR7284B1024

INSTALLATION INSTRUCTIONS

69-2467-01

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:

Summary of content (12 pages)

PAGE 1
R7284B,P,U,G Electronic Oil Primary, EnviraCOM™ Enabled INSTALLATION INSTRUCTIONS 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.
PAGE 2
R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED • 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.
PAGE 3
R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED Location 1. 2. 3. 4. 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). Before mounting the control, make line voltage connections as shown in Fig. 2 through 10. Splice lines with solderless connectors.
PAGE 4
R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED R7284B, G R7284P, U CIRCULATION PUMP … … AQUASTAT OR OTHER LIMIT LIMIT AQUASTAT OR OTHER LIMIT L1 L1 R L1 L1 … … M32179 THERMOSTAT 4 JUMPER 3 L1 L2 1 L8148A,C R7284 LIMIT T L1 T 3 ENVIRACOM™ TERMINAL R7284B, P, U B2 B1 T T W Fig. 4. R7284 Limit wiring for line voltage thermostat, Aquastat, or other Limit.
PAGE 5
R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED T8635L 3 T T/3 2 1 2 C7089B OUTDOOR TEMPERATURE SENSOR 1 1 1 2 3 L1 1 2 L1 (HOT) 1 IGNITER 2 BURNER MOTOR 2 VALVE T CAD CELL R7284 LIMIT 3 L1 2 L2 1 SCREW TERMINAL COOL 1 RELAY Y2 COOL 2 RELAY T JUNCTION BOX LEGEND: W2 Y1 4 3 CAD CELL W1 R IGNITER 2 VALVE C RH RC SYSTEM TRANSFORMER 4 FAN RELAY G L2 L2 BURNER MOTOR 3 W8635A L1 B1 ENVIRACOM™ TERMINAL 2 1 L2 L7224/48 R7284 LIMIT T OT TH9421C Visio
PAGE 6
R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED ADVANCED USER INTERFACE UP/DOWN i i i UP/DOWN i i (NO SELECTED) i HOLD ALL 3 BUTTONS i (YES SELECTED) i (EXIT SELECTED) i i i (CONT. SELECTED) i i i M32103 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.
PAGE 7
R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED Adjustment of the Burner Off Delay. View History Configuration of the TT terminals vs. an “internal jumper.” Controls sparking during On Delay period. 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. Controls sparking during Run mode (Interrupted vs. Intermittent ignition).
PAGE 8
R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED 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) 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.
PAGE 9
R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED Table 5. R7284 Operation. External Action Power applied to control. Thermostat or Aquastat® Control calls for heat. R7284 Action Internal safety check conducted. If no light or flame is detected and all internal conditions are correct, control enters Standby Mode. 1. 2. 3. 4. 5. 6. Call for heat is satisfied. 1. 2. Reset control three times without completing a call for heat (number of resets is adjustable in some controls) 1. 2. 3. 4.
PAGE 10
R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED 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 Replace limit switch or clean contacts. of limit switch.
PAGE 11
R7284B,P,U,G ELECTRONIC OIL PRIMARY, ENVIRACOM™ ENABLED Table 7. Display Alarm Information 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.
PAGE 12
RUNNING H/F 1 Table 8. LED Flash Codes. LED EnviraCOM™ Flash Alarm Code 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.