Honeywell EnviraCOM R7284B Manual

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."
INSTALLATION INSTRUCTIONS
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:
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