Honeywell Burner R7184A User Manual

R7184A,B,P,U  
Interrupted Electronic Oil Primary  
INSTALLATION INSTRUCTIONS  
lockout timing will be extended to 4 minutes and the  
APPLICATION  
ignition set in the intermittent mode for this cycle only.  
The R7184 automatically reverts to its labeled interrupted  
and safety switch timing states. The pump priming cycle  
can only be entered if there have been no lockout  
occurrences since the last successful heat call. To reset  
the device so that the pump priming cycle can be  
entered, press and hold the reset button for 30 seconds  
until the LED flashes twice.  
The R7184A,B,P,U Interrupted Electronic Oil Primary is a  
line voltage, safety rated, interrupted ignition oil primary  
control for residential oil fired burners used in boilers,  
forced air furnaces and water heaters. The  
R7184A,B,P,U used with a cad cell flame sensor,  
operates an oil burner and optional oil valve. The primary  
controls fuel oil, senses flame, controls ignition spark and  
notifies a remote alarm circuit when in lockout.  
Disable Function  
The R7184 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.  
Pressing and holding the reset button will disable all  
functions until the button is released. The R7184 will  
restart at the beginning of the normal heat cycle on  
safety check.  
Limited Reset (Restricted Mode)  
In order to limit the accumulation of unburned oil in the  
combustion area, the control can only be reset three  
times. The reset count returns to zero each time a call for  
heat is successfully completed.  
Some hydronic and forced air systems now require a  
delayed valve-on and burner motor-off delay. The R7184  
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).  
To reset from restricted mode: Press and hold the reset  
button for 30 seconds. When the LED flashes twice, the  
device has reset.  
The R7184 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 UL  
296. 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.  
SPECIFICATIONS  
Models:  
Table 1 lists the major features and the applicable wiring  
diagram numbers for the R7184.  
FEATURES  
Timing:  
Safe Start Check: 5 seconds (approximately).  
Valve-on Delay: 15 seconds.  
Burner motor-off Delay: 0, 2, 4, or 6 minutes, field-  
selectable using DIP switch positions 1 and 2.  
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 R7184 locks out.  
NOTE: For universal R7184U model, valve-on delay  
and burner motor-off delay timings can be  
enabled (values as listed) or disabled (values  
are zero) in the field using DIP switch position 3.  
Pump Priming Cycle  
To facilitate purging air from the oil lines and filters, the  
R7184 can be placed in a purge routine by pressing and  
releasing the reset button during the safety check,  
delayed valve-on , ignition or carry-over periods. The  
Lockout: 15, 30 or 45 seconds (factory-programmed).  
Recycle: 60 seconds (fixed).  
Ignition Carryover: 10 seconds (fixed).  
® U.S. Registered Trademark  
Copyright © 2000 Honeywell Inc. • All Rights Reserved  
 
69- 1233- 2  
R7184A,B,P,U INTERRUPTED ELECTRONIC OIL PRIMARY  
CHECKOUT  
L8148A,C  
THERMOSTAT  
C1  
AQUASTAT®  
CONTROLLER  
L1  
L2  
CIRCULATION  
PUMP  
C2  
Start System  
B2  
B1  
1
T
T
R
W
WARNING  
R7184  
LIMIT  
L1  
T
T
Fire Hazard.  
Can cause serious injury or death.  
Make sure combustion chamber is free of oil  
and/or oil vapor before starting system.  
L2  
JUMPER  
BURNER MOTOR  
BURNER  
MOTOR  
INTERRUPTED  
IGNITOR  
IGNITOR  
INTERRUPTED  
INTERMITTENT  
IGNITOR  
VALVE  
INTERMITTENT  
VALVE  
TO  
REMOTE  
ALARM  
BURNER MOTOR  
L1  
CAD  
CELL  
CAD  
CELL  
ALARM  
2
CIRCUIT  
JUNCTION  
BOX  
L2  
SCREW TERMINAL  
LEGEND:  
1/4 IN. QUICK CONNECT TERMINAL  
1
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS  
AND OVERLOAD PROTECTION AS REQUIRED.  
M17182B  
LIMIT  
OPTIONAL FEATURE ON SELECT MODELS.  
CAD CELL  
VALVE  
Fig. 3. Wiring for typical oil-fired boiler.  
M16453A  
L1  
(HOT)  
T8600  
L2  
1
Fig. 2. Wiring terminals.  
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.  
COOLING  
RC  
G
FAN RELAY  
CONTROL  
Y
R7184  
T
1
L1  
HOT  
R
L1  
LIMIT  
T
W
L2  
L2  
VALVE  
3
BURNER  
MOTOR  
BURNER  
MOTOR  
Check Safety Features  
Safe Start  
1. Place a jumper across cad cell terminals.  
2. Follow procedure to turn on burner. Burner must  
not start, indicator light turns on and control  
remains in Idle Mode.  
INTERRUPTED  
IGNITOR  
IGNITOR  
INTERMITTENT  
TO  
CAD  
CELL  
CAD  
REMOTE  
ALARM  
CIRCUIT  
CELL  
ALARM  
2
JUNCTION  
BOX  
Simulate flame failure:  
1. Follow procedure to turn on burner.  
2. Close hand valve in oil supply line.  
3. Device enters recycle mode.  
SCREW TERMINAL  
LEGEND:  
1/4 IN. QUICK CONNECT TERMINAL  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS  
AND OVERLOAD PROTECTION AS REQUIRED.  
4. Device tries to restart system after approximately  
2
3
OPTIONAL FEATURE ON SELECT MODELS.  
VALVE MAY BE ADDED AS SHOWN.  
60 seconds.  
5. Safety switch locks out approximately in safety  
switch timing indicated on label. Indicator light  
flashes at 1 Hz rate. Ignition and motor stop and oil  
valve closes.  
M17183B  
Fig. 4. Typical wiring diagram for 24 Vac thermostat  
and R7184 for an oil-fired forced air system.  
3
69-12332  
 
R7184A,B,P,U INTERRUPTED ELECTRONIC OIL PRIMARY  
R7184  
R7184  
JUMPER  
T
T
LINE VOLTAGE  
THERMOSTAT  
OR AQUASTAT®  
CONTROL  
L1  
1
L1  
T
LIMIT  
L1  
HOT  
L2  
1
LINE VOLTAGE  
THERMOSTAT  
OR AQUASTAT®  
CONTROL  
LIMIT  
LIMIT  
T
L1  
HOT  
L2  
JUMPER  
L2  
VALVE  
L2  
3
BURNER  
MOTOR  
BURNER  
MOTOR  
VALVE  
OIL  
VALVE  
INTERRUPTED  
IGNITOR  
IGNITOR  
BURNER  
MOTOR  
BURNER  
MOTOR  
INTERMITTENT  
INTERRUPTED  
IGNITOR  
TO  
REMOTE  
ALARM  
IGNITOR  
CAD  
CELL  
CAD  
ALARM  
CELL  
INTERMITTENT  
2
CIRCUIT  
TO  
REMOTE  
ALARM  
CIRCUIT  
JUNCTION  
BOX  
CAD  
CELL  
ALARM  
CAD  
CELL  
2
SCREW TERMINAL  
LEGEND:  
1/4 IN. QUICK CONNECT TERMINAL  
JUNCTION BOX  
1/4 IN. QUICK CONNECT TERMINAL  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS  
AND OVERLOAD PROTECTION AS REQUIRED.  
SCREW TERMINAL  
LEGEND:  
OPTIONAL FEATURE ON SELECT MODELS.  
VALVE MAY BE ADDED AS SHOWN.  
2
3
1
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS  
AND OVERLOAD PROTECTION AS REQUIRED.  
M17184B  
M17186A  
OPTIONAL FEATURE ON SELECT MODELS.  
Fig. 5. Typical wiring diagram for line voltage  
Aquastat® thermostat and R7184 for an oil burner  
system.  
Fig. 7. Typical wiring diagram for line voltage  
Aquastat® thermostat and R7184B,P,U for valve-on  
delay/burner motor-off delay oil burner system.  
Simulate ignition failure:  
L1  
(HOT)  
T8600  
1. Follow starting procedure to turn on burner, but do  
not open oil supply hand valve.  
L2  
1
COOLING  
CONTROL  
RC  
G
FAN RELAY  
2. Observe that safety switch locks out approximately  
within safety switch timing as indicated on the  
label. Indicator light flashes at 1 Hz rate. Ignition  
and motor stop and oil valve closes.  
R7184  
Y
L1  
T
R
1
L1  
HOT  
L2  
LIMIT  
T
LIMIT  
W
L2  
OPERATION  
The R7184 is a microprocessor-based control. The  
indicator light provides diagnostic information for lockout,  
recycling and patented cad cell status. There is a manual  
reset button to exit the lockout mode and enter the idle  
mode. Operation is shown in Table 4.  
VALVE  
OIL  
VALVE  
BURNER  
MOTOR  
BURNER  
MOTOR  
INTERRUPTED  
IGNITOR  
IGNITOR  
INTERMITTENT  
TROUBLESHOOTING AND  
MAINTENANCE  
TO  
REMOTE  
ALARM  
CAD  
CELL  
CAD  
ALARM  
CELL  
2
CIRCUIT  
IMPORTANT:  
JUNCTION  
BOX  
Due to the potential hazard of line voltage, only  
a trained, experienced service technician  
should perform the troubleshooting procedure.  
SCREW TERMINAL  
LEGEND:  
1/4 IN. QUICK CONNECT TERMINAL  
1
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS  
AND OVERLOAD PROTECTION AS REQUIRED.  
This control contains no field-serviceable parts.  
Do not attempt to take it apart. Replace entire  
control if operation is not as described.  
M17185A  
OPTIONAL FEATURE ON SELECT MODELS.  
To completely troubleshoot an oil burner installation,  
check the burner and oil primary control for proper  
operation and condition.  
Fig. 6. Typical wiring diagram for 24 Vac thermostat  
and R7184 for valve-on delay/burner motor off oil  
burner system.  
The indicator light on the oil primary control provides  
lockout, recycle and cad cell indications as follows:  
69-12332  
4
 
R7184A,B,P,U INTERRUPTED ELECTRONIC OIL PRIMARY  
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.  
VALVE ON DELAY TIME: 15 SEC. (FIXED)  
DELAY TIMES:  
BURNER MOTOR OFF DELAY TIME:  
1
2
1
2
1
2
1
2
3
3
0 MIN.  
2 MIN.  
4 MIN.  
6 MIN.  
ENABLED DISABLED  
M17535  
(SHADED AREA IS SWITCH HANDLE POSITION)  
Fig. 8. Switch settings for burner-off delay times.  
Table 2. Switch Settings and Delays.  
DIP Switch Settings  
Delay Timings  
Burner Motor-Off Delay  
(minutes)  
Valve-On  
Delay  
(seconds)  
S-3 Enable/Disable  
R7184U R7184P  
R7184U  
R7184P  
S-1  
S-2  
0
0
0
2
4
6
X
X
Off  
On  
On  
On  
On  
+
+
+
+
+
15  
0.5  
2
Off  
Off  
On  
On  
Off  
On  
Off  
On  
15  
15  
4
15  
8
X = Dont Care.  
+ = S-3 not provided on R7184P models.  
6. Check the piping to the oil tank.  
7. Check the oil nozzle, oil supply and oil filter.  
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 Table 3 for equivalent cad cell resistance.  
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:  
Table 3. Cad cell resistance when sensing flame.  
Flashes  
Cad Cell Resistance in ohms  
Less than 400  
1. Screwdriver.  
2. Voltmeter (0 to 150 Vac).  
3. Insulated jumper wire with both ends stripped.  
1
2
3
4
More than400 and less than 800  
More than 800 and less than 1600  
More than 1600 and less than 5000  
WARNING  
Electrical Shock Hazard.  
Can cause serious injury or death.  
Troubleshoot with the system powered. Be  
careful to observe all precautions to prevent  
electrical shock or equipment damage.  
Preliminary Steps  
1. Check wiring connections and power supply.  
2. Make sure power is on to the controls.  
3. Make sure limit control is closed.  
4. Check contacts between ignitor and the  
electrodes.  
Refer to Table 4 for further troubleshooting  
information.  
5. Check the oil pump pressure.  
5
69-12332  
 
R7184A,B,P,U INTERRUPTED ELECTRONIC OIL PRIMARY  
Table 4. R7184 Operation.  
External Action  
R7184 Action  
Power applied to control.  
Internal safety check conducted. If no light or flame is detected and all internal  
conditions are correct, control enters Idle mode.  
®
1. Shorts across T-T terminals (on as call for heat) in warm air system and/or  
provides power to limit terminals in hydronic system.  
2. Safety Period (4 seconds) internal and external check for flame or light. If flame or  
light is detected, control remains in Idle mode.  
3. When flame or light is not present:  
Thermostat or Aquastat  
Control calls for heat.  
a. R7184A,U (if valve-on delay is disabled) will apply power to the burner motor  
and ignitor.  
b. R7184B,P,U (if valve-on delay is enabled) will apply power to the burner motor  
and ignitor, enter/complete valve-on delay period and then apply power to the  
valve.  
4. 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, ignitor and burner motor.  
(3) Flashes indicator light at 1 Hz (1/2 second on, 1/2 second off).  
(4) Depress reset button to return to power up sequence.  
c. When flame is detected, Carry-Over period begins:  
5. Control enters Ignition Carry-Over period (continues to spark for 10 to 30  
seconds).  
a. Turns on indicator light.  
b. If flame is lost and lockout time has not expired, R7184 returns to Trial for  
Ignition period.  
c. If flame is lost and lockout time has expired, R7184 enters Recycle Mode.  
6. Carry-Over time expires; ignitor turns off.  
7. 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) Indicator light flashes at 1/4 Hz (2 seconds on, 2 seconds off).  
(5) Returns to Idle mode at end of Recycle mode.  
Call for heat is satisfied.  
1. R7184A,U (if burner motor-off delay is disabled):  
a. Burner motor and oil valve shut off.  
b. Indicator light turns off.  
2. R7184B,P,U (if burner motor-off delay is enabled):  
a. Oil valve shuts off.  
b. Burner motor runs for selected burner motor-off delay.  
c. Burner motor turns off.  
d. Device returns to Idle mode.  
Reset button pushed two  
times without device  
completing a call for heat.  
1. R7184 enters Restricted mode.  
2. Indicator light flashes at 1Hz (1/2 second on, 1/2 second off).  
3. Reset device by pressing and holding reset button for a minimum of 30 seconds.  
Table 5. Troubleshooting Information .  
Procedure  
Status  
Corrective Actions  
Condition: Burner does not start with a call for heat.  
1. Check that limit switches are closed  
and contacts are clean.  
2. Check for line voltage power at the oil  
primary control. Voltage should be 120  
Vac.  
3. Check indicator light with burner off, Indicator light is on.  
no call for heat (no flame).  
Cad cell or controller is defective, sees external light  
or connections are shorted. Go to step 4.  
Indicator light is off.  
Go to step 5.  
69-12332  
6
 
R7184A,B,P,U INTERRUPTED ELECTRONIC OIL PRIMARY  
Table 5. Troubleshooting Information (Continued).  
Procedure  
Status  
Corrective Actions  
4. Shield cad cell from external light.  
Indicator light turns  
off.  
Eliminate external light source or permanently shield  
cad cell.  
Indicator light stays  
on.  
Replace cad cell with new cad cell and recheck.  
If indicator light does not turn off, remove cad cell  
leadwires from R7184 and recheck.  
If indicator light turns off, replace cad cell bracket  
assembly. Refer to TRADELINE® Catalog for  
bracket part numbers.  
If indicator light does not turn off, replace  
controller.  
5. On warm air systems, jumper  
thermostat (T to T) terminals on R7184.  
(On hydronic systems jumper Limit  
terminal and L1 of R7184.)  
Burner starts.  
Trouble in thermostat or limit circuit. Check  
thermostat or limit wiring connections.  
Burner does not start.  
Disconnect line voltage power and open line  
switch.  
Check all wiring connections.  
Tighten any loose connections and recheck.  
If burner does not start, replace R7184.  
IMPORTANT:  
First remove one thermostat  
lead.  
Condition: Burner starts, then locks out on safety with indicator light flashing at 1 Hz rate (1/2 second on, 1/2  
second off).  
1. Check that limit switches are closed  
and contacts are clean.  
2. Check for line voltage power at the  
oil primary control. Voltage should be  
120 Vac.  
3. Check indicator light with burner off, Indicator light is on.  
no call for heat (no flame).  
Cad cell or controller is defective, sees external light  
or connections are shorted. Go to step 4.  
Indicator light is off.  
Go to step 5.  
4. Shield cad cell from external light.  
Indicator light turns  
off.  
Eliminate external light source or permanently shield  
cad cell.  
Indicator light stays  
on.  
Replace cad cell with new cad cell and  
recheck.  
If indicator light does not turn off, remove cad  
cell leadwires from R7184 and recheck.  
If indicator light turns off, replace cad cell  
®
bracket assembly. Refer to TRADELINE  
catalog for bracket part numbers.  
If indicator light does not turn off, replace  
controller.  
5. On warm air systems, jumper  
thermostat (T to T) terminals on R7184.  
(On hydronic systems, jumper Limit  
terminal and L1 of R7184.)  
Burner starts.  
Trouble is in thermostat or limit circuit. Check  
thermostat or limit wiring connections.  
IMPORTANT:  
First remove one thermostat lead.  
Burner does not start.  
Disconnect line voltage power and open line  
switch.  
Check all wiring connections.  
Tighten any loose connections and recheck.  
If burner does not start, replace R7184.  
Condition: Burner starts then locks out on safety with indicator light flashing at 1 Hz rate (1/2 second on, 1/2  
second off)  
6. Reset oil primary control by pushing Indicator light stops  
Go to step 7.  
in and releasing red reset button.  
flashing.  
Indicator light  
Verify that control is not in restricted mode (see  
continues to flash at footnote a). If not in restricted mode, replace R7184.  
a
1 Hz rate .  
7
69-12332  
 
R7184A,B,P,U INTERRUPTED ELECTRONIC OIL PRIMARY  
Table 5. Troubleshooting Information (Continued).  
Procedure  
Status  
Corrective Actions  
7. Listen for spark after burner turns on Ignition is off.  
(after a 2 second delay.  
Spark ignitor could be defective. Check for line  
voltage at ignitor terminals. If line voltage is present,  
replace R7184.  
Ignition is on.  
Go to step 8.  
Ignition is on, but no Wait for Valve On Delay to complete (R7184B,P, and  
oil is being sprayed U). Check oil valve, oil valve wiring, pump and oil  
into the combustion  
chamber.  
supply.  
8. Check indicator light after flame is  
established, but before oil primary  
control locks out.  
Indicator light is on  
until the control locks  
out and starts flashing  
during lockout.  
Replace R7184.  
Indicator light stays  
off.  
Go to step 9.  
Go to step 10.  
9. Check cad cell sighting for view of  
flame.  
Burner locks out.  
Burner keeps running. System is okay.  
Disconnect line voltage power and  
open line switch.  
Unplug cad cell and clean cad cell  
face with soft cloth. Check sighting  
for clear view of flame. Place cad cell  
back in socket.  
Reconnect line voltage power and  
close line switch.  
Start burner.  
10. Check cad cell.  
Indicator light is on.  
Indicator light is off.  
Place control back on burner. Go to step 6.  
Disconnect line voltage power and  
open line switch.  
Remove existing cad cell and replace  
with new cad cell.  
Disconnect all wires from thermostat  
terminals to be sure there is no call  
for heat.  
Go to step 11.  
Reconnect line voltage power and  
close line switch.  
Expose new cad cell to bright light,  
such as a flashlight.  
11. Check cad cell bracket assembly.  
Indicator light is on.  
Replace cad cell bracket assembly. Refer to  
Disconnect line voltage power and  
open line switch.  
TRADELINE® Catalog for bracket part numbers.  
Remove cad cell wires from quick-  
connect connectors on the R7184  
and leave control leadwires open.  
Apply power to device.  
Place jumper across cad cell  
terminals after burner motor turns on.  
Indicator light is off.  
Replace R7184.  
Home and Building Control  
Honeywell Inc.  
Honeywell Plaza  
Home and Building Control  
Honeywell Limited-Honeywell Limitée  
155 Gordon Baker Road  
North York, Ontario  
P.O. Box 524  
Minneapolis, MN 55408-0524  
M2H 3N7  
Printed in U.S.A. on recycled  
paper containing at least 10%  
post-consumer paper fibers.  
69-12332 G.R. Rev. 5-00  
 

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