RG-DIGITAL CONTROL
Installation Manual
w w w. roya l l gr i l l s. co m
325 South Park Street Reedsburg, WI 53959
Phone 608-768-8508
CONTENT
MAJOR FEATURES .....................................................................................................................................
1
REMOVING THE OLD CONTROL...............................................................................................................
2
INSTALLING THE DIGITAL CONTROL.......................................................................................................
4
TESTING THE GRILL ...................................................................................................................................
6
OPERATION OVERVIEW.............................................................................................................................
7
UNDERSTANDING THE DISPLAY .............................................................................................................
8
CONNECTING THE GRILL TO AC POWER................................................................................................
9
IGNITING THE GRILL..................................................................................................................................
9
COOKING.....................................................................................................................................................
9
SMOKING.....................................................................................................................................................
11
UNDERSTANDING IDLE FUEL FEED RATE & SMOKE SETTINGS .........................................................
11
ERROR MODES AND MESSAGES ............................................................................................................
13
WIRING DIAGRAM......................................................................................................................................
14
AC AUGER THEORY OF OPERATION .......................................................................................................
15
TROUBLESHOOTING..................................................................................................................................
16
MAJOR FEATURES
The RG-Digital Control is a plug-compatible replacement part
for the Royall Standard 3-Speed Control and is compatible
with the entire line of Royall wood fired pellet grills.
Ty p i c a l A p p l i c at i o n s H i g h p e r f o r m a n ce u p g ra d e
replacement for Royall Standard 3-Speed Control.
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Three Digit Temperature Display
Front Panel Cook Control
Eight Cook Temperature Settings (180 through 375 degrees)
“High” Cook Temperature Setting
D I G I TA L D I S P L AY
Front Panel Smoke Control
Sixteen Smoke Settings (P0 - P15)
Ignition Indicator
Smoke Setting Indicator
Cook Idle Fuel Rate Indicator
Low Temperature Indicator
Inadvertent Start Protection
Over Temperature Protection
SMOKE CONTROL
COOK CONTROL
How It Works
Cook Mode In Cook Mode, the temperature of the grill is
constantly monitored and a microprocessor operates the draft
fan and fuel feed auger to maintain a constant grill temperature.
Smoke Mode In Smoke Mode, the fuel feed rate is set manually by the operator.
The grill operates at low temperature to provide maximum smoke.
RG-Digital Control comes standard in the following Royall Grills:
RGPRO
RG2000
RG3000
RG5000VS
RG-Three Speed comes standard in the following Royall Grills:
RG1000
RGTAILGATER
1
REMOVING THE OLD CONTROL
Required Tools
Medium Phillips screwdriver
Small slotted screwdriver
Power Screwdriver 1/4” Only
Unplug the Grill
Unplug the grill from AC power.
WARNING
AC power is present on the control at all times and is a shock hazard unless the grill is
disconnected from the wall socket or AC line.
Remove Hopper Panel Access Cover
This Panel Access Cover protects grill components
while allowing air to flow into the draft fan. Remove the
screws and panel from the grill. Royall’s new RGPro does not
have an access cover. Unscrew hopper front as well as old
control to access internal equipment.
Disconnect the Control
Working under the grill, locate the control’s wiring harness.
Disconnect all four plugs that connect the control to the
grill’s components (fuel feed auger, draft fan, igniter,
and AC power).
2
Remove the Control
Remove the faceplate screws using a medium phillips
screwdriver. Save the screws for use later. Gently pull the
control forward, rotating it slightly to the right. Once clear,
pull the wire harness up and out of the cutout.
Disconnect the Probe
If you are removing a Royall Digital Control, you must
disconnect the probe. Turn the control until the circuit board
is facing you. Using a small slotted screwdriver, disconnect
the probe lead wires from the two-terminal connector J1
located in the upper right hand corner of the printed
circuit board.
Remove the Probe
Open the cook lid and locate the probe. Probes are all
located on the left side of the grill except for the RGPRO
which is located on the right side. Loosen the mounting
screws. Lift the probe and feed its wire leads up and out of
the grill.
Probe
3
INSTALLING THE DIGITAL CONTROL
Position The Probe
Open the cook lid.
Shaft hole
Wire hole
Locate the probe’s mounting holes.
Feed the probe’s wire lead down through the shaft hole
and out through the wire hole.
Screw holes
Run the Probe Wire Lead
Feed the probe wire lead down between the grill and the
pellet hopper, then up and out through the control cutout.
Use caution when feeding the wire lead to avoid damaging
the wire lead’s insulation.
Note
Both the RG1000 and RGTailgater come with three pre drilled holes.
The RG1000 will have the screws already installed and you will have to remove them before
installing the probe. The RGTailgater will not have the three screws and you will have to install
the provided screws.
Attach the Probe to the Side Panel
Install the Probe into the shaft hole with the slot
positioned over the screw hole. Install the screw from
above, down through the slot and through the screw hole.
Connect the Probe to the Control
Disconnect the grill from AC power.
Warning
Installing the control while the grill is connected
to AC power could result in shock or could cause
damage to the control.
Connect the probe lead wires to connector J1 located in the
upper right hand corner of the printed circuit board.
Use a small flat blade screwdriver to fully open the
contacts by turning the set screw counter clockwise.
Insert the wires and tighten the contacts by turning the set screw
clockwise. You can connect either lead wire to either
terminal of connector J1.
4
Install the Control into the Cutout
Feed the control wiring harness (four plugs with orange,
purple, red, black, and white wires) downward into the grill’s cutout.
Insert the control into the cutout. Install the control’s circuit
board into the cutout at an angle to ensure the circuit board
fits through the cutout without damage.
Warning
Do not force the control into the cutout. Bumping electronic components into the edge of the
cutout during installation may damage the control.
Retrieve the two faceplate mounting screws that were used
to hold the old control in place.
Using a medium phillips screwdriver, install the top faceplate
screw and lightly tighten. Install the bottom faceplate screw
and tighten. Tighten the top faceplate screw.
Connect the Control to Grill Components
Connect the fuel feed auger, draft fan, igniter, and AC
power to the Digital Control. Working under the hopper, connect
the control wiring harness to the grill components as follows:
Red Wire to
Orange Wire to
Draft Fan
Auger
Purple Wire to
Black Wire to
Igniter
AC Power
Control Wiring Harness
Plug with Red Wire
Plug with Orange Wire
Plug with Purple Wire
Plug with Black Wire
Grill Component
Fuel Feed Auger
Draft Fan
Igniter
AC Power
5
Connect Control’s Black Wire to AC Power
Organize Wire Lead
If necessary, use the tie wrap to tie back the temperature
probe wire lead and the control’s wiring harness to ensure
they do not interfere with the draft fan and other grill components.
Attach Hopper Access Cover
TESTING THE GRILL
Prepare the Grill
Set the cook control to the off position. Open the cook lid,
remove the internal grill, the drip pan, and the heat detector,
to expose the firepot.
Turn the Grill On
Plug the grill into AC power. Turn the cook control switch
to the Smoke Position.
Check the Draft Fan
Place your hand above the firepot and verify air movement
from the draft fan.
Check the Igniter
Verify the igniter located in the base of the firepot is getting
hot. DO NOT TOUCH THE IGNITER!
Check the Fuel Auger
Verify that pellets are flowing into the firepot. If the pellet
hopper is empty, open the hopper lid, look inside the hopper
and verify the auger is turning.
Turn the Grill Off
Set the cook control to the off position.
Reassemble the Grill
If the grill passes the tests above, reassemble the grill.
If not, refer to the “Troubleshooting” section of this manual.
6
OPERATION OVERVIEW
LED Readout
Displays grill temperature, smoke settings, idle fuel feed settings, igniter status, low temperature status, and error messages.
Cook Control Switch
Selects off, smoke mode, or one of nine cook mode grill temperatures.
Smoke Control Switch
Selects one of sixteen smoke/idle fuel feed rates.
Cook Mode
Maintains the selected cook temperature.
Smoke Mode
Produces maximum smoke at a low grill temperature.
Microprocessor Control
In cook mode, the temperature of the grill is constantly monitored and a microprocessor operates the draft fan and
fuel feed auger to maintain a constant grill temperature.
Manual Control
In smoke mode, the fuel feed rate is set manually by the operator. The grill operates at low temperature to provide
maximum smoke.
SMOKE CONTROL
D I G I TA L D I S P L AY
COOK CONTROL
7
UNDERSTANDING THE DISPLAY
Numbers
When the grill is connected to AC power, the model number
and software version of the control are displayed momentarily.
Temperature
In cook mode and smoke mode, the grill temperature is
displayed in 5 degree (Fahrenheit) increments.
Flashing Temperature
In cook mode, the displayed temperature flashes if the grill
temperature is below 150 degrees.
In smoke mode, the displayed temperature flashes if the grill
temperature is below 110 degrees.
Flashing Dots
The igniter is on.
“P0” - “P15”
When the cook control switch is set to the smoke position,
the smoke setting is displayed for 3 seconds.
If you adjust the smoke control switch while in smoke
mode, the smoke setting is displayed for 3 seconds.
If you adjust the smoke control switch while in the cook
mode, the idle fuel feed rate setting is displayed for 3 seconds.
Flashing “ErH”
The grill temperature exceeded 615 degrees.
Flashing “ErP”
The cook control switch was not in the off position when
the grill was connected to AC power.
8
CONNECTING THE GRILL TO AC POWER
Turn the Grill Off
Set the cook control switch to the off position.
Plug the Grill In
Connect the grill to AC power. The control displays its model number and software version.
If you see “ErP”
If the cook control switch is in the smoke position or any temperature setting when the grill is plugged in, the control
will display “ErP” indicating an inadvertent start error. The standard ignition sequence is halted. This feature prevents
an inadvertent start. For example, if the grill is stored in the garage, the grill will not ignite if plugged in inadvertently.
To clear the error, set the cook control switch to off.
IGNITING THE GRILL
Cook Control
To ignite the grill, set the cook control switch to the smoke position or any temperature setting.
Ignition Sequence
- The draft fan turns on.
- The igniter turns on.
- The fuel feed auger turns on and delivers fuel continuously for two minutes.
- The grill temperature is displayed along with three flashing dots signifying that the igniter is on.
The igniter will turn off when one of the following three conditions is met:
- The igniter has been on for four minutes and the grill temperature has increased by 30 degrees.
- The igniter has been on for four minutes and the grill temperature is greater than 150 degrees.
- The igniter has been on for five minutes.
Once the igniter turns off, if the cook control switch is set to the Smoke position, the grill operates in smoke mode.
If the cook control switch is set to a temperature setting, the grill operates in cook mode. The flashing dots are turned off.
COOKING
Cook Control
Set the cook control switch to the desired temperature. The control displays the grill’s current temperature.
Cook sequence once the ignition sequence is complete and the igniter turns off, the auger feeds fuel into the fire pot
to maintain the set temperature.
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Temperature Settings
180 180 degrees
225 225 degrees
250 250 degrees
275 275 degrees
300 300 degrees
325 325 degrees
350 350 degrees
375 375 degrees
High 450 degrees or Maximum Temperature
High Temperature Setting
If the cook control switch is set to high, the grill operates at 450 degrees. If the grill is unable to attain 450 degrees
due to ambient temperature and humidity, fuel type and quality, and/or thermal characteristics of the grill, the auger
feeds fuel continuously allowing the grill to operate at its maximum temperature.
On Fuel Feed Rate
The on fuel feed rate is the rate the auger delivers fuel while the grill is under the set temperature. In cook mode, the
on fuel feed rate is designed to drive the grill’s temperature upward to the set temperature and limit temperature
overshoot. The on fuel feed rates are preprogrammed into the control and are not adjustable.
Temperature
Setting
180
225
250
275
300
325
350
375
High
Auger On
15 seconds
always on
always on
always on
always on
always on
always on
always on
always on
Auger Off
15 seconds
0
0
0
0
0
0
0
0
Idle Fuel Feed Rate
The idle fuel feed rate is the rate the auger delivers fuel while the grill is idling at or above the set temperature.
In cook mode, you can manually adjust the idle fuel feed rate using the Smoke Control switch. See “Understanding
Idle Fuel Feed Rate and Smoke Settings” for more information.
Low Temperature
If the grill temperature is less than 150 degrees, the displayed temperature flashes, indicating a low temperature.
This is not an error condition and does not affect the operation of the grill. The flashing display is designed to alert the
operator that there is some risk of the fire going out.
High Temperature
If the grill temperature is greater than 615 degrees, a flashing “ErH” is displayed indicating a high limit error and
the grill shuts down. Refer to the “Error Modes and Messages” section for details.
10
SMOKING
Smoke Control
Set the cook control switch to smoke. Use the smoke control switch to manually select the auger fuel feed rate.
The control displays the grill’s current temperature.
Smoke sequence once the ignition sequence is complete and the igniter turns off, the auger delivers fuel at a
constant rate determined by the smoke setting (P0 - P15).
Smoke Setting
The smoke fuel feed rate is the rate the auger delivers fuel while the grill is operating in the smoke mode. In smoke
mode, manually adjust the fuel feed rate using the smoke control switch to establish the desired temperature
and/or smoke output See “Understanding Idle Fuel Feed Rate and Smoke Settings” for more information.
Low Temperature
If the grill temperature is less than 110 degrees, the displayed temperature flashes, indicating a low temperature.
This is not an error condition and does not affect the operation of the grill. The flashing display is designed to
alert the operator that there is some risk of the fire going out.
High Temperature
If the grill temperature is greater than 615 degrees, a flashing “ErH” is displayed indicating a high limit error and the
grill shuts down. Refer to the “Error Modes and Messages” section for details.
UNDERSTANDING IDLE FUEL FEED RATE & SMOKE SETTINGS
Smoke Control Switch
The smoke control switch sets the fuel feed rate (the amount of fuel delivered in a given period of time) when the grill
is operating in smoke mode and when the grill is idling in cook mode.
During cook idle or smoke mode, the auger turns on, delivers fuel for 15 seconds, then turns off. The off time is set by
the smoke control switch.
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“P” Settings
The fuel feed rate setting is displayed momentarily whenever the cook control switch is set to the smoke position.
It is also displayed whenever the smoke control switch is adjusted. The setting is designated with the letter “P” and
a number. The greater the “P” setting number the greater the auger off time.
Setting
P0
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P11
P12
P13
P14
P15
Auger On
15 seconds
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
Auger Off
45 seconds
55
65
75
85
95
105
115
125
135
140
145
150
155
160
165
Dual Function
The selected “P” setting controls both the smoke mode fuel feed rate and the cook mode idle fuel feed rate.
They are one and the same.
For example, if “P3” is selected using the smoke control switch, the auger delivers fuel for 15 seconds, turns off for
75 seconds, and repeats in smoke mode. It also delivers fuel for 15 seconds, turns off for 75 seconds and repeats while
idling in cook mode.
Cook Mode
The idle fuel feed rate is the rate of fuel delivery that dle fuel feed rate maintains the fire in the fire pot without
raising the grill’s temperature.
In cook mode, whenever the grill temperature is at or above the set temperature, the auger runs at the idle fuel feed
rate. If the grill temperature is below the set temperature, the auger operates per the on fuel feed rate.
We recommend the “P2” setting as the default idle fuel feed rate while in cook mode.
For the experienced operator, the auger idle fuel feed rate can be adjusted to improve the grill’s performance.
For example, to optimize temperature stability at a high temperature setting, select “P1” or “P0” to increase the
auger idle fuel feed rate or, if due to ambient conditions the grill is unable to cool down enough to reach a low
temperature setting such as 180 degrees, select “P3”, “P4”, or higher to decrease the idle fuel feed rate.
High Temperature Idle Fuel Feed Rate
In cook mode, the idle fuel feed rate for the high temperature setting is preprogrammed into the control. The idle fuel
feed auger timing at high is 15 seconds on / 15 seconds off and is independent of the smoke control switch “P” setting.
The preprogrammed fuel feed rate helps maintain the elevated cooking temperature at the high setting.
12
Smoke Mode Fuel Feed Rate
In smoke mode, increasing the “P” setting decreases the fuel feed rate, lowering the grill temperature. Start at setting
“P2”, adjust the “P” setting manually for the desiredtemperature and/or smoke output.
ERROR MODES AND MESSAGES
Inadvertent Start Error (ErP)
If the cook control switch is set to Smoke or to a temperature setting at the time the grill is plugged in, the control will
display “ErP” indicating an inadvertent start error. The standard ignition sequence is halted.
This feature prevents an inadvertent start. For example, if the grill is stored in the garage, the grill will not ignite if
plugged in inadvertently.
To clear the error, set the cook control switch to the off position
High Temperature Limit Error (ErH)
If the grill temperature exceeds 615 degrees, the control limit error (ErH) displays “ErH” indicating a high
temperature limit error.
The fuel feed auger is turned off, the igniter is turned off, and the draft fan is turned off.
To clear the error, set the cook control switch to the off position. If the error will not clear, your temperature
detector is not functioning normally See “Display is Flashing ‘ErH’” in the “Troubleshooting” section.
Flashing In cook mode, the displayed temperature flashes if the grill temperature is below 150 degrees.
This is not an error condition and does not affect the operation of the grill. The flashing display is designed to alert the
operator that there is some risk of the fire going out.
In smoke mode, the displayed temperature flashes if the grill temperature is below 110 degrees.
This is not an error condition and does not affect the operation of the grill. The flashing display is designed to alert the
operator that there is some risk of the fire going out.
Flashing Dots
The igniter is on.
This is not an error condition and does not affect the operation of the grill. The flashing dots are designed to alert the
operator that the igniter is on.
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WIRING DIAGRAM
14
AC AUGER THEORY OF OPERATION
AC Auger
The grill is equipped with an AC auger. AC augers operate at a single speed and deliver fuel at a constant rate while
on The fuel feed rate (amount of fuel delivered in a given period of time) is adjusted by varying the on and off
time intervals.
Duty Cycle The ratio of time the auger is on is sometimes referred to as the duty cycle and is expressed as a percentage For example, if the auger is always on, its duty cycle is 100 percent If the auger is on half the time, its duty cycle is
50 percent, etc.
Idle and Smoke Fuel Feed Rates and “P” Settings
When the TR-100 is in smoke mode or idling in cook mode, the AC auger is turned on and delivers fuel continuously
for 15 seconds and is then turned off. The smoke control switch sets the auger off time. The smoke mode/cook mode
idle fuel feed rates are as follows:
Setting
P0
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P11
P12
P13
P14
P15
Auger On
15 seconds
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
Auger Off
45 seconds
55
65
75
85
95
105
115
125
135
140
145
150
155
160
165
Duty Cycle
25.0 percent
21.4
18.8
16.7
15.0
13.6
12.5
11.5
10.7
10.0
9.7
9.4
9.1
8.8
8.6
8.3
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TROUBLESHOOTING
Warning
Always disconnect the grill from AC power before accessing the control for service
or working under the grill.
Removing the control from the grill, installing the control into the grill, or working under the grill while
the grill is connected to AC power could result in shock or could damage the control.
Digital Control Display is Blank
cook control switch is set to the off position. Set cook control switch to the smoke position or any temperature setting.
Circuit breaker on AC outlet is tripped. Reset wall power outlet circuit breaker.
Control is disconnected from grill AC power. Verify control wiring harness plug with black wire is connected to AC
power.
Digital Control Display is Blank
Control AC line fuse is blown. Replace control’s fuse F1 with provided spare fuse or a replacement fuse.
A blown AC line fuse may be caused by several conditions including shorted
grill component lead wires, a jammed auger, or a failing igniter. Inspect the
grill’s components and component lead wires if replacement fuses are
continually blown.
Grill Will Not Ignite
No fuel in firepot. Fill hopper with good, dry fuel. Verify auger is properly
connected to control. Clear auger if jammed. Replace auger and/or auger
motor if defective.
Fuse
No draft air flow
Verify draft fan is properly connected to control and
operating normally. Replace draft fan if defective.
No ignition heat source
Verify igniter is properly connected to control and operating
normally.
Replace igniter if defective
Control is defective
Contact Royall Grills technical support.
16
Fire Goes Out
Set cook control switch to the off position and allow grill to cool.
No fuel in hopper
Fill hopper with good, dry fuel.
No fuel in firepot
Verify the control is properly connected to auger. Clear auger if jammed. Replace auger and/or auger motor if defective.
Unburned fuel in firepot
Adjust smoke control switch (decrease the “P” setting) to increase auger idle fuel feed rate.
No draft air flow
Verify the control is properly connected to draft fan and operating normally. Replace draft fan if defective.
Control is defective
Contact Royall Grills technical support.
Grill Temperature at the 180 Degree Cook Setting is too High
Auger idle fuel feed rate is too high. Adjust smoke control switch (increase the “P” setting) to decrease idle fuel
feed rate.
Probe is defective
Replace probe
Control is defective
Contact Royall Grills technical support.
Grill Temperature at the High Cook Setting is too Low
At the high temperature setting, the auger runs continually until the grill temperature reaches 450 degrees.
Grill lid is open
Close grill lid. Grill is designed to operate with grill lid closed.
Insufficient amount of fuel in fire pot
Clear auger if jammed. Tighten auger connection to auger motor shaft if slipping. Replace auger and/or auger motor
if defective.
Damp fuel source
Replace damp fuel with good dry fuel.
Adverse operating conditions
Shield grill from cold wind and/or rain. Grill may not be able to attain 450 degrees in an extremely cold operating
environment.
17
Unexpected Temperature Displayed
Auger idle fuel feed rate is too high. Adjust smoke control switch (increase the “P” setting) to decrease idle fuel
feed rate.
Auger idle fuel feed rate is too low
Adjust smoke control switch (decrease the “P” setting) to increase idle fuel feed rate.
Grill lid is open
Close grill lid. Grill is designed to operate with grill lid closed.
Probe is defective
Contact Royall Grills technical support.
Control is defective
Contact Royall Grills technical support.
Grill Temperature Displayed is Different Than Dome Thermometer
This is normal. The displayed temperature is the precise temperature at the Probe. The dome thermometer is located
in a different position inside the grill.
Displayed Temperature is Flashing
Low grill temperature. This is not an error condition and does not affect the operation of the grill. The flashing display
is designed to alert the operator that there is some risk of the fire going out.
Display Always Reads 0 Degrees
Probe wire leads are shorted. Check connection at control terminal J1. Fully open contacts by turning set screw
counter clockwise. Reinsert wires and tighten contacts by turning set screw clockwise. Check the insulation for
shorts throughout the wire run from detector to control terminal J1.
Probe is defective
Contact Royall Grills technical support.
Control is defective
Contact Royall Grills technical support.
Display is Flashing “ErP”
Inadvertent start error. The grill was plugged in with the cook control switch in the smoke position or set to a temperature setting. Set the cook control switch to the off position.
Display is Flashing “ErH”
Overtemperature error. The grill temperature exceeded 615 degrees and shut off automatically. Set the cook control
switch to the off position.
Probe wire leads are open
Check connection at control terminal J1. Fully open contacts by turning set screw counter clockwise. Reinsert wires
and tighten contacts by turning set screw clockwise. Check for breaks in the wire throughout the wire run from probe
to control terminal J1.
Probe is defective
Contact Royall Grills technical support.
Control is defective
Contact Royall Grills technical support.
18