Universal Interrupted
Electronic Oil Primary
R7184U
Training Module
What you will learn
• R7184U Product Overview
• Key Features and Benefits
• Installation and Set Up
• Troubleshooting
• Product Cross Reference
• R7184U Oil Primary Advantages
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R7184U Interrupted Electronic Oil Primary
• What is the R7184U?
- It is a line voltage, safety rated,
primary control for residential
oil fired burners used in boilers,
forced air furnaces and water
heaters.
 Applicable for use with both
hydronic and forced air
systems.
- Used with a cad cell flame
sensor, operates an oil burner
and optional oil valve.
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Universal Oil Primary
Part Numbers:
R7184U1004
R7184U1012
R7184U1020
R7184U Key Features
• Universal compatibility
- This control replaces Carlin, White
Rodgers and all prior Honeywell Oil
Primary Controls
• EnviraCOMTM communications
enabled:
- Includes EnviraCOM™ Connection for
local networking & diagnostics
- Compatible with the Honeywell
EnviraLINK™ remote monitoring
application, which enables dealers to
monitor their customers systems
remotely.
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R7184U Key Features
• Diagnostic LED
- Indicator light monitors burner flame status and system
lockout
• The versatile R7184U includes these “Exclusive
Features”:
- Pump priming cycle
- Cad cell flame strength indicator
- Limited recycle
• Extended Service Life (Control and Application)
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Additional R7184U Features
•Available in 15-, 30-, and 45-second lockout times
 R7184U1004 = 15 second lockout
 R7184U1012 = 30 second lockout
 R7184U1020 = 45 second lockout
• Optional valve-on delay, blower-off delay models:
- Models: 15 seconds, or selectable 0 or 15 second valve-on delay
• Zero time or selectable 0-, 2-, 4-, 6-minute blower-off delay
• Safe start check – check for flame presence prior to lighting the burner
• Compatible with power venters without integral timers
• Oil-resistant plastic cover for electronics
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R7184U Feature Function Benefit
FEATURE
FUNCTION
Pump Purge
Temporary setting of safety
timing to 4 minutes
Allows installer to purge oil
lines without remaining at oil
primary
CAD Cell Resistance
Readout
Flash CAD resistance range
while burner is running
Allows installer to check that
flame strength is adequate
prior to leaving job site
Limited Recycle
Limits recycle to 3 per any
one call for heat
Detects running saturation or
poor combustion from
partially clogged nozzle and
locks out to prevent heat
exchanger clogging or oil
flooding
Limited Reset
Limits resets to 3 during any
single call for heat
Prevents homeowner from
continually pressing reset
button when service is
needed
Communications
HVAC communications
Allows local and remote
diagnostics for better
troubleshooting and new
services
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BENEFIT
R7184U Feature Function Benefit
FEATURE
FUNCTION
Communicating Accessories
Additional devices to utilize
communications capability
Remote access, test tools
Leadwire and Quick Connect
Termination
Support both quick connects
and leadwire termination
Replaces both OEM and
installed base with one
model
Alarm Contacts
Indication of control lockout
Allows connection to
security system or other
indications to warn of control
lockout
Selectable Valve On Delays
Field selectable valve on
delay
Allows user to inventory and
carry one universal product
for various valve on delay
times
Selectable Blower Off Delay
Field selectable blower off
delay
Allows user to inventory and
carry one universal product
for various blower delay on
times
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BENEFIT
Key Features: Oil Primary R7184U
Diagnostic LED – enables
monitoring of system status
to speed troubleshooting
EnviraCOM™ Communications
Data Port
Limited reset –
prevents continued
homeowner reset
without proper
service checkout
EnviraCOM™
Terminals.
T-T Terminals
Timer Setting Dip
Switches – Universal
Alarm Contacts (dry contacts,
Application
normally open) – Provides
switch action to remote alarm
panels
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Installation
Installing the R7184U
• Follow the installation instructions per the
application:
- Locate proper location
- Mount
- Wire per application type
 Oil fired boiler without EnviraCOMTM
 Oil fired boiler with EnviraCOMTM
 Oil fired forced air with EnviraCOMTM
 Etc.
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Set-Up
Set-Up of the R7184U: Setting Delay Times
15 Sec
0
Valve On Delay
1st Switch: Valve On Delay
2nd & 3rd Switches: Burner Motor OFF Delay
ON
Easy access to set
up delay times.
1
2
ON
ON
1
2
0 min.
13
3
ON
1
2
2 min.
ON
1
2
4 min.
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1
2
8 min.
Setting Delay Times
ON
Oil Pump Delay
3
ON
2
ON
1
OR
3
Delay Off
3
Delay On
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Setting Delay Times
Delay Choices
Model
Valve ON Delay
Blower OFF
(Seconds)
(Minutes)
R7184A
None
None
R7184B
15
None
R7184P
15
0-2-4-8
R7184U
0 or 15
0-2-4-6
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Troubleshooting
Troubleshooting of the R7184U
•
The indicator light on the control provides lockout,
recycle and cad cell indications as follows:
1. Flashing at 1 Hz (1/2 second on, 1/2 second off): system is locked out
or in restricted mode.
2. Flashing at 1/4 Hz (2 seconds on, 2 seconds off): control is in recycle
mode.
3. On: cad cell is sensing flame.
4. Off: cad cell is not sensing flame.
•
Cad Cell Resistance Check
- For proper operation it is important that the cad cell resistance
is below 1600 ohms. During a normal call for heat, once the
control has entered the Run mode, press and release the reset
button. Indicator light will flash 1 to 4 flashes. See next slide for
equivalent cad cell resistance.
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Troubleshooting: Diagnostics
• Push lockout button once to get cad cell
resistance and system status
Flashes
Indication
Steady
Control is sensing flame
Off
Control is not sensing flame
Flashing
Control is in lockout or restricted mode
( ½ sec on / ½ sec off)
Flashing
( 2 sec on / 2 Sec off)
Control is in recycle mode
1
< 400 ohms
2
400 - 800 ohms
3
800 - 1600 ohms
4
1600 – 5000 ohms
*CAD Cell Ohms decreases with increased flame brightness
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Troubleshooting of the R7184U
• For Honeywell EnviraCOM™ enabled equipment
- Read EnviraCOM Error Codes
- Line Voltage
- Cad Cell Ohms
•The QuickLookTM 72 is available through
www.onwatchinc.com
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Product Cross Reference
Product Cross Reference
• Where do I find Honeywell universal
electronic oil primary cross
reference information?
- www.customer.honeywell.com
- Honeywell Application Selection and
Cross Reference Guide – Form 63-9575
- Honeywell Laminated Truck Visor – Form
63-9581
- Honeywell Oil Primary Countermat –
Form 63-9661
- Honeywell Residential Technical
Support: 1-800-468-1502
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Oil Primary Cross Reference Table
This chart can be found in the Residential
Combustion Application
Guide: Form #63-9575
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www.customer.honeywell.com
• See Cross Reference Search box in right column.
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R7184U Oil Primary Advantages
• When promoting the R7184U Universal Oil Primary keep these
advantages in mind:
• Universal Compatibility
- This control replaces Carlin, White Rodgers and all prior Honeywell Oil
Primary Controls
• Honeywell R7184U “Exclusive Features”
- Pump priming cycle
- Cad cell flame strength indicator
- Limited recycle
• Diagnostic LED
- Indicator light monitors burner flame status and system lockout
• EnviraCOM communications enabled
- It includes EnviraCOM™ Connection for local networking & diagnostics
- Compatible with Honeywell EnviraLINK™ remote monitoring application
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R7184U Interrupted
Electronic Oil Primary
Knowledge Test
R7184U Oil Primary Knowledge Test
• Now that you completed this training module, take
the short quiz to test your knowledge.
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Test
1. The R7184U can be used in both hydronic and
forced air systems? T or F
2. The Honeywell R7184U can replace ALL prior
Honeywell oil primary controls, as well as Carlin
and White Rodgers controls? T or F
3. There is one way to determine cad cell ohms and
that is through the diagnostic LED? T of F
4. The R7184U is available in 3 lockout times, 15, 30
and 45 seconds? T or F
5. The pump priming cycle requires that the installer
be present at the oil primary to purge the line? T
or F
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Test
6. Limited reset prevents the homeowner from
continually pressing the reset button instead of
calling for service? T or F
7. The diagnostic LED can identify system lockout?
T or F
8. The valve on and blower off delay times are
factory set and cannot be set by the installer
during installation? T or F
9. The limited recycle features can help prevent
clogging the heat exchanger or flooding? T or F
10. EnviraLink is the remote monitoring service that
can be used with R7184U EnviraCOM enabled oil
primary? T or F
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Answer Key
1. T
2. T
3. F
4. T
5. F
6. T
7. T
8. F
9. T
10. T
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