Switch Settings And Delays; Cad Cell Resistance When Sensing Flame; Preliminary Steps - Honeywell R7184A Installation Instructions Manual

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.
VALVE ON DELAY TIME: 15 SEC. (FIXED)
BURNER MOTOR OFF DELAY TIME:
1 2 1 2 1
4 MIN.
0 MIN. 2 MIN.
(SHADED AREA IS SWITCH HANDLE POSITION)
Fig. 8. Switch settings for burner-off delay times.
Delay Timings
Burner Motor-Off Delay
Valve-On
Delay
(seconds) R7184U
0 0
15 0
15 2
15 4
15 6
X = Don't Care.
+ = S-3 not provided on R7184P models.
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.
Table 3. Cad cell resistance when sensing flame.
Flashes Cad Cell Resistance in ohms
1 Less than 400
2 More than400 and less than 800
3 More than 800 and less than 1600
4 More than 1600 and less than 5000

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.
5. Check the oil pump pressure.
DELAY TIMES:
2 1 2 3
6 MIN.
ENABLED DISABLED
Table 2. Switch Settings and Delays.
(minutes)
R7184P
— X
0.5 Off
2 Off
4 On
8 On
R7184A,B,P,U INTERRUPTED ELECTRONIC OIL PRIMARY
3. On: cad cell is sensing flame.
4. Off: cad cell is not sensing flame.
3
M17535
DIP Switch Settings
S-1 S-2
X
Off
On
Off
On
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).
3. Insulated jumper wire with both ends stripped.
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.
Refer to Table 4 for further troubleshooting
information.
5
S-3 Enable/Disable
R7184U
Off +
On +
On +
On +
On +
R7184P
69-1233—2