Savannah STOKER v3 User manual

SAVANNAH STOKER v3 INSTRUCTION MANUAL
2015.01 Copyright © Sound Solutions, LLC. All Rights Reserved. Find us on Face ook.com/SavannahStoker , Pelletheads.com and LetsTalkBBQ.com 1
SAVANNAH STOKER v3 TEMPERATURE CONTROLLER
FOR THE WOOD PELLET GRILL
Thank-you for purchasing the Savannah Stoker Pellet Grill Control
System. The Savannah Stoker is a PID ased artificial intelligent
temperature controller that allows you to control your wood pellet grill or
smoker with “simplicity but infinite control”.
FEATURES
•Set the desired cooking/smoking temperature from 160°- 550°F
or the max temperature your grill can reach in 1° increments.
•Typical temperature swings are 5-10°F when cooking a ove
250°F and 10-15°F when smoking elow 225°F.
•Hardwired permanent installed temperature sensor, compati le
with the OEM temperature sensor.
•Grill cool-down cycle. The fan runs until the grill temperature
drops elow 130°F.
•3 Speed Fan selecta le y the user. High for cooking; Medium
for Smoking, and Extra Low for cold smoking.
•Auger Bypass. Press a utton and the auger runs 100% to get
to grilling temperatures faster.
•Optional interface with the STOKER® Power Draft System from
Rocks Bar-B-Que. Add the features of the STOKER like remote
temperature control and monitoring from a computer or
Smartphone or graph the cook with StokerLog running on a PC.
Requires an optional ca le. The STOKER is availa le from
http://www.rocks ar que.com.
SPECIFICATIONS
The Savannah Stoker is a direct replacement temperature controller for
most Traeger Wood Pellet Grills ut it will not fit in the Traeger Junior or the
PTG. It will also control most smokers made y Blaz’n Grills Works Wood
Pellet Grills, Royall Wood Pellet Grills (except the tailgater), Camp Chef
Pellet Grill & Smoker and Smoke Daddy Pellet Pro. The Savannah Stoker
may e compati le with other wood pellet grills ut may requiring
modifications to the grill or wiring connectors.
Input type
Compata le with the OEM RTD and with K-Type
Thermocouple hardwired to the ack of the controller
Accuracy 0.75%Full scale or ±2.2 ºC for K-Type thermocouple
Response Time ≤ 1.0s (when FILt=0)
Display Resolution 1°F
Control Modes
Automatic Control using PID ased algorithims
Manual Control
STOKER® Control (optional interconnect ca le required)
Fan Output Zero crossing SSR, 85-240VAC/3A
Auger Output Zero crossing SSR, 100-240VAC/3A
Igniter Output Zero crossing SSR, 100-240VAC/10A
Power supply 100-240VAC 50-60Hz
Power consumption 300 Watts at startup, 60 Watts normal operation
Am ient temperature 0~50ºC, 32~122ºF
Fuse 5x20mm 4A 250V Cooper Bussmann #S500-4-R or equal
WARNING Electrical Shock Risk!
Electrical power is present to the controller
an time the grill is connected to an AC Power
Source. Before attempting to remove or install
the controller the grill must be disconnected
from the AC Power Source. Failure to do so
could result in personal injur from electrical
shock and/or damage to the controller. When
not in use the grill should be disconnected from
the AC Power Source. The controller should be
protected from moisture at all times. It is highl
recommended the grill be connected to a GFCI
outlet or other protected circuit when in use.
WARRANTY
Sound Solutions, LLC, warrants to the original purchaser the controller
will e free from defects in material and workmanship under normal use
for a period of one (1) year from the date of original purchase. The
temperature sensors and the STOKER® interface ca le are warranted
for a period of ninety (90) days.
The warranty shall not apply: (i) to any controller su jected to accident,
misuse, neglect, water damage, alteration, acts of God, improper
handling, improper transport, improper storage, improper use or
application, improper installation, improper testing or unauthorized
repair; or (ii) to cosmetic pro lems or defects that result from normal
wear and tear under ordinary use and do not affect the performance or
use of the product. If the controller develops a covered defect during
the warranty period, Sound Solutions, LLC, will, at its option, either
repair or replace the controller, the temperature sensor or the STOKER
interface ca le at no charge, provided that the controller and/or
temperature sensor are returned to Sound Solutions, LLC, during the
warranty period
To o tain warranty service contact Sound Solutions for an RMA # y
phone: [phone] or email: [e-mail]
Return the component(s) along with a copy of the sales receipt to:
Sound Solutions, LLC
4205 Holly Street
Ayden, NC 28513
THE ABOVE STATED WARRANTY IS EXCLUSIVE AND REPLACES
ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING
THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. SOUND SOLUTIONS, LLC WILL NOT BE HELD LIABLE
FOR ANY OTHER DAMAGES OR LOSS INCLUDING INCIDENTAL
OR CONSEQUENTIAL DAMAGES AND LOSS OF PROFITS OR
REVENUES FROM WHATEVER CAUSE, INCLUDING BREACH OF
WARRANTY OR NEGLIGENCE.

SAVANNAH STOKER v3 INSTRUCTION MANUAL
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1. Installation
1.1 Required tools.
Medium Size #2 Phillips Head Screwdriver
Small/Narrow Flat Blade Screwdriver
A small towel
1.2 Unplug the grill from the power source.
WARNING Electrical Shock Risk!
Electrical power is present to the controller an time
the grill is connected to an AC Power Source.
Before attempting to remove or install the controller
it is important the controller is in the OFF position
and disconnected from the AC Power Source.
Failure to do so could result in personal injur from
electrical shock and/or damage to the controller.
When not in use the grill should be disconnected
from the AC Power Source. It is highl
recommended the grill be connected to a GFCI
outlet or other protected circuit.
1.3 Assembl of the controller.
If ou received the controller in the in our “Green Packing”,
ou will have to attach the controller to the face plate and
the wiring harness to the back of the controller.
1) Place a small towel on a flat surface to work over.
2) Remove the controller from the ox.
3) Loosen the screws on the metal retainer clips on oth ends until
you can remove the metal retainer. The screws do not have to
e completely removed.
4) Place the controller through the printed side of the faceplate.
5) Replace the retainer clips. The ack side of the retainer clip
slides in a grove on the controller. Tighten the screws, ut not
too tight.
6) On the ack of the controller loosen the screws at terminals #10,
#12, #13, #15, and #16. Each terminal is la eled including with
the matching wire color.
Slide the spade connectors under the terminal clips making sure
to match the corresponding wire color. Tighten the terminal
screws to secure the wires.
CAUTION
If the wires are not connected to the
correct terminals the controller will
not work properl and could damage
the controller when powered up.
The wiring must NOT interfere with the
draft fan or the auger cooling fan.
The controller will not work correctl if
Remote Temperature Detector (RTD)
is not properl connected.
Figure1.
Terminal Labels
1.4 Removing the existing controller.
Your process ma var . The following is for most Traegers.
1) Remove the two screws holding the controller to the pellet
hopper saving the screws for use later.
2) Gently pull the controller away from the hopper while sliding it
slightly to the right. Rotate the left side toward you so the circuit
oard (PCB) can clear the hopper opening.
3) Once the PCB is clear, pull apart (disconnect) the 4 wiring
connectors y reaching up from ottom side of the hopper with
one hand and through the opening with the other.
4) If the controller has 2 white wires connected to the ack, remove
them using the narrow screwdriver. The 2 white wires run to the
Remote Temperature Detector (RTD) located in the cooking
cham er.
You can use the existing RTD or install the RTD included with the
SSv3. If using the existing RTD go to step 1.6.
1.5 To remove the existing Remote Temperature Detector (RTD).
1) Remove the grill grate and drip tray to provide access to the left
side of the grill.
2) Remove the RTD, y removing the screw and lock nut located to
the left of the RTD.
3) Pull the RTD up and feed the wires through the hole in the side
of the grill and the end rail until the wires are removed.
1.6 Installing a new RTD.
1) Uncoil the wires to the sensor.
2) Tread the wires through the second hole in the end rail (same
hole the RTD was in) and then through the hole in the left end of
the grill a out 1” elow the end rail and a ove the drip tray
support.
3) Continue feeding the wires downward etween the pellet hopper
and the grill ody, then up and out the controller cutout.
4) Secure the sensor mounting racket to the left end rail with the
enclosed machine screw.
5) Connect the sensor wires to the ack of the Savannah Stoker to
TERMINAL #4 and TERMINAL # 5 marked RTD see Figure 1.
Either wire can go to either TERMINAL. Make sure none of the
insulation is under the terminal screws. Tighten the terminal
screws to secure the wires.
6) Coil the sensor wires and secure together with a wire tie.
1.7 Installing the Savannah Stoker.
1) Place the wiring harness of the Savannah Stoker in the hopper
opening. Reaching up from the ottom of the hopper, reconnect
the wiring matching the correct color coded connector.
RED = AUGER MOTOR (Small Fan Blade)
ORANGE = DRAFT FAN (Large Fan Blade)
PURPLE = IGNITER (Fi erglass Insulation)
BLACK = POWER (Black/White Wires)
2) Place the controller in the hopper opening and re-install the top
and ottom faceplate screws and tighten.
3) Working from under the hopper, secure the temperature sensor
wires and the controller wires with wire ties to the underside of
the hopper so the wires do not interfere with the auger fan of the
draft fan.

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2. Quick Start Guide 3. The Front Panel
Yep, instead of reading the rest of the manual ou’re in a hurr
to fire up the smoker and see what the Savannah Stoker can do.
Right? Well, for ever one just like ou this Quick Start Guide was
prepared. So, what are ou waiting for! Time to smoke something
even it’s just air. (air=empty grill)
2.1 Start-up.
NOTE: Refer to your smoker’s owner manual for recommended start-
up and safety procedures. Always start with a clean smoker for est
results.
1) Plug the smoker to a GFCI protected AC outlet, it’s a safety
thing. The Stand- y indicator will illuminate RED indicating
power is present at the controller.
2) Press the Power KEY . The Stand- y indicator will go OFF.
Both displays on the controller will flash, then the top display
(PV) will show the current temperature inside the cooking
cham er. The ottom display (SV) is the desired cooking
temperature. You can read more a out (PV) & (SV) in the
column to the right, ….. later right?
3) The AUG and IGN indicator lights will e ON.
4) After several minutes the pellets will start to smolder and whitish-
gray smoke will illow out then change color to that thin lueish
smoke. You’ve seen this efore.
5) When the cooking cham er reaches 130°+ the IGN indicator will
go OFF, so did the Igniter.
6) Notice the AUG indicator cycling ON and OFF? If not now, it will,
just keep watching. ON, the auger running. OFF, it’s not.
7) When the smoker has heated up, cook something. It’s etter to
cook food than air. Besides, while you’re just sitting and watching
the controller’s displays and smelling the smoke for the next hour
you could cook some sausage for tomorrow’s reakfast.
2.2 Setting the Cooking/Smoking Temperature (SV).
Recommended start-up temperature is 225° to preheat the grill, ut
any start-up temperature can e set etween 160° - 550°F in one (1°)
degree increments. To change the Setpoint Value (SV) press/release
the ▼ or ▲ KEY. The decimal point on the lower right corner of the
display will start to flash. Press the ▼ or ▲ KEY to change SV until
the desired temperature is displayed. The decimal point will stop
flashing after no KEY is pressed for 3 seconds. You can press the
A/M KEY to move the flashing decimal point to the desired digit that
needs to change. Then press the ▼ or ▲ KEY to change SV starting
from that digit.
2.3 Shut down.
1) Set the temperature (SV) to 225° or your future desired start-up
temperature.
2) If you changed the FAN speed to medium or low, reset the
FanS value to 3. (If you changed the speed you have read most
of the manual.)
3) Press the POWER KEY . The top display will flash “HOT”
and the FAN indicator will link until the cooking cham er
temperature drops elow 120° (the value of Fant)
4) The controller will power-off and the Stand- y indicator will
illuminate RED indicating power is present at the controller.
5) Disconnect the power source.
6) Store the grill & cover. The controller should e protected from
the elements. Water damage is not covered under the warranty.
3.1 Understanding the Front Panel.
The num ers in the circle efore each feature refers to Figure 2.
① Stand b indicator: Light is on when the controller is connected to
a power source ut not running. When the controller is running the
light will go off and the displays will e on.
② PV displa : The temperature inside the cooking cham er;
commonly referred to as Process Varia le or Process Value (PV).
③ SV displa : When in normal operation mode this is the target
temperature; it is commonly referred to as Setpoint Value (SV).
When in display mode 2, it indicates the mode the controller is in
(Automatic or Manual) and the output value (%).
④ FAN indicator: Light links when in “Cool Down”.
⑤ IGN indicator: Light is on when the IGNITER is on.
⑥ A/M indicator: Light is on when the controller is in MANUAL
MODE.
⑦ AUG indicator: Light is on anytime the AUGER is running.
⑧ A/M KEY: Automatic/Manual function KEY; Data shift KEY
⑨ Decrement KEY ▼: Decreases numeric value of the SV display.
⑩ Increment KEY ▲: Increases numeric value of the SV display.
⑪ SET KEY: Pressed momentarily, the controller switches the lower
display (SV) etween setpoint value and percentage of output.
When pressed and held for two seconds the controller will enter the
parameter setting mode.
⑫ AUG KEY: When engaged, the auger runs continuously.
⑬ Power KEY : When the controller is off and the Stand y
indicator is RED, press the Power KEY to start the controller. When
the controller is ON, pressing the Power KEY will start the “Cool
Down” cycle. See 4.1.
4
5
11
8
2
3
1
6
7
9
10
12
13
Figure 2. Front Panel

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4. Basic Operations
4.1 Turning the Controller On/Off
To turn the Controller ON:
Connect the smoker to a GFCI protected AC outlet. The Stand- y
indicator will illuminate RED indicating power is present at the controller.
Press the Power KEY . The Stand- y indicator will go OFF. Both
displays on the controller will flash. The top display (PV) will show the
current temperature inside the cooking cham er. The ottom display
(SV) is the desired cooking temperature.
To turn the Controller OFF:
Press the POWER KEY , the controller will start the “COOL DOWN’
cycle. The top display will flash “HOT” and the fan light will link until the
cooking cham er temperature drops elow 120° (the value of Fant). The
controller will power-off and the Stand- y indicator will illuminate RED
indicating power is present at the controller.
4.2 Changing the Cooking Temperature, the Setpoint Value (SV)
Recommended start-up temperature is 225° to preheat the grill, ut any
start-up temperature can e set etween 160° - 550°F in one (1°)
degree increments. To change the Setpoint Value (SV) press/release the
▼ or ▲ KEY. The decimal point on the lower right corner of the display
will start to flash. Press the ▼ or ▲ KEY to change SV until the desired
temperature is displayed. The decimal point will stop flashing after no
KEY is pressed for 3 seconds. You can press the A/M KEY to move the
flashing decimal point to the desired digit that needs to change. Then
press the ▼ or ▲ KEY to change SV starting from that digit.
4.3 Displa Modes:
The controller has 3 Displa Modes.
Displa Mode 1.
When the controller first turns ON it will e in Displa Mode 1. This is
the most used Display Mode. The (PV) display shows the temperature
inside to cooking cham er. The (SV) display shows the target
temperature of the cooking cham er.
Displa Mode 2.
It you want to watch the controller in action place the controller in Display
Mode 2. When in Display Mode 1, press/release the SET KEY to enter
Displa Mode 2. The (PV) display shows the temperature inside the
cooking cham er. The (SV) display changes to show the auger’s output
as a % of the cycle time (t). Example: If the (SV) display is “A 60”, the
“60” indicates the Auger is running 60% of the cycle time. This value may
change at the start of each cycle. The “A” in the display indicates the
controller is in the “Automatic Control Mode”.
Pressing the A/M KEY will switch the controller to “Manual Control
Mode”. When in Manual Control Mode, the first digit to the left will
change to an “M” to indicate Manual Control Mode. Refer to the Section
5.1 Control Modes on the use of “Manual Control Mode”
Displa Mode 3.
When in Displa Mode 1, press/hold the SET KEY for 2 seconds to
enter Displa Mode 3. Display Mode 3 is where the values of the
various operation parameters can e manually changed. The (PV)
display shows the parameter name, the (SV) display is the current value.
Use ▲ and ▼ to modify the current value. Press/release the SET KEY
to advance to the next parameter. After the last parameter is displayed,
press/release the SET KEY to exit Display Mode 3.
4.4 Using the Auger B pass Feature.
Press/release the AUG KEY to run the Auger continuously ypassing
the Control Modes. The (SV) display will flash “ACC” and the last set
temperature when the Auger Bypass feature is eing used.
Press/release again to return to normal operation. The Auger Bypass
feature is typically used for high temp grilling or to raise the grill’s
temperature more quickly than Automatic Mode.
Caution: When using Auger B pass Mode the cooking
chamber, drip tra , and the grease drain s stem
should be clean. Cooking at high temperatures
increases the risk of having a grease fire. Never leave
the grill unattended. Alwa s return the auger to normal
operation before turning off the grill.
4.5 Changing the Fan Speed
Place the controller in Display Mode 3.
Press/release the SET key to page to parameter FanS.
Use the ▲ and ▼keys to modify the current value.
3 is normal fan speed, 2 is medium fan speed and 1 is slow fan speed.
Medium Fan Speed is great to use when smoking elow 225° or when
using the STOKER elow 250°. Limit the use of the low fan speed for
cold smokin’.On low fan speed the risk of losing fire is greatly increased.
Note: Alwa s return the Fan Speed to normal for cool down.
This space is provided for your notes:
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5. Control Modes
The controller operates in 3 different Control Modes:
AUTOMATIC, MANUAL, and STOKER Control.
5.1 Automatic Mode
Automatic Control Mode is the normal operational mode of the controller.
In Automatic Mode the controller maintains the desired cooking/smoking
temperature typically within 5-10°F when cooking a ove 225°F and 10-
15°F when smoking elow 200°F. Every grill and cooking environment is
different so your results may vary.
How it works, if ou reall want to know.
The controller measures the temperature of the sensor in the grill,
compares it to the target temperature, and then runs the auger a
percentage of the cycle time (t) to maintain the target temperature.
The controller uses “PID control Software” to determine the auger
runtime %. The controller also runs the auger a minimum amount
each cycle time to maintain the fire much like a pilot light.
C cle Time Defined.
Cycle time is a time period (in seconds) the controller uses to
calculate the auger’s runtime. Example: When the cycle time
parameter is set to t=20, and the controller has determined the
output for the next cycle should e 25%, the auger will run for 5
seconds at the start of the next cycle and will e off for the remaining
15 seconds of the cycle. The default cycle time is 20 seconds.
What the heck is “PID”?
A PID controller is a control loop feed ack mechanism widely used in
automated processes like the cruise control on your car. The PID
controller algorithm involves three separate constant parameters: the
Proportional, the Integral and Derivative values, denoted P, I, and D.
Simply put, these values can e interpreted in terms of temperature:
“P” depends on the present “error”, “I” on the accumulation of past
“errors”, and “D” is a prediction of future “errors”, ased on current
rate of change over a period of time. The weighted sum of the PID
values is used to calculate the adjustment to the process to minimize
the “error”. This adjustment is made at the start of each cycle time.
Refer to 6.3.3 for information about the PID parameters.
5.2 Manual Mode.
Manual Mode allows the user to manually adjust the auger runtime
as a percentage of the cycle time (t). To activate Manual Control
Mode from Automatic Control Mode, press the Set KEY once to enter
in Display Mode 2. Then press the A/M KEY. The A/M indicator light
will come on. The upper display shows the measured value (PV) and
the lower display shows the output % value. The first digit to the left
will e an “A” when in Automatic Control Mode or to “M” to indicate
Manual Control Mode. The value is the % of the cycle time (t) the
auger is running. Example: If t=20 which is a 20 second cycle time
and the output value is 20%, the auger runs 4 seconds (20% of 20
seconds) at the start of the cycle and then off 16 seconds. In Manual
Mode pressing the ▼ or ▲KEYs will lower or raise the auger
runtime %. Note: Manual mode will e running the last output value
when the controller was in Automatic Mode. The runtime % cannot
e set lower than the OutL parameter value.
5.3 STOKER Control Mode
If you own the STOKER® Power Draft System from Rocks Bar-B-Que
www.rocks ar que.com you already know it’s capa ilities like food and
grill temperature monitoring; accurate temperature control of a wood or
charcoal smoker; we rowser interface to access and remotely control
the STOKER from any Smartphone or computer; and several third party
programs and apps to make it even easier. You could use all of these
features with a pellet grill except temperature control. But the game
changes with the Savannah Stoker; just connect it to the Stoker with the
optional interface ca le to add remote temperature control of your pellet
grill. The interconnection ca le is availa le from Sound Solutions, LLC.
Contact information is in the Warranty Section on Page 1.
NOTE: It is not the intent of this manual to provide instructions on the
use or setup of the STOKER. The instructions elow descri e how to
properly connect the STOKER to the Savannah Stoker.
How it Works:
On a wood/charcoal smoker the STOKER measures the temperature
of the pit with a sensor, compares the reading to the target
temperature, and then cycles a “Blower” attached to one of the
ottom drafts of the smoker to maintain the temperature. To use the
STOKER to control a Pellet Grill the STOKER has to e adapted to
control the Auger in a similar way it controls the “Blower”. This is
where the Savannah Stoker comes in.
Let’s get started!
1) Start your grill as you normally do. Preheat to the desired
cooking/smoking temperature for at least 15 minutes.
2) While the grill is preheating plug the STOKER’s Pit Sensor into the
STOKER. Clip the Pit Sensor next to the Savannah Stoker’s
temperature sensor. Once the STOKER is running and the grill has
preheated you can connect the Interface Ca le.
3) Connecting the Interface Ca le:
a) Turn OFF the STOKER.
) Plug the Interface Ca le into one of the STOKER’s device
input ports.
c) Turn ON the STOKER.
4) Assigning the Interface Ca le to the correct Pit Sensor.
The STOKER needs to know which “Sensor” to use with the
interface ca le. The STOKER recognizes the Interface Ca le as a
“Blower”. Refer to the STOKER Users Manual Ver. 2.7 p16-17.
a) From the Main Menu of the STOKER, press the ↑↓ uttons to
Scroll until “Temp Control” is in the ottom display.
) Press the Sel utton to choose the Temp Control option.
c) Press Sel again to scan the sensors.
d) Scroll through the sensor(s) until the name of your Pit Sensor
in the Pellet Grill is displayed.
e) Press Sel to enter the Temperature Sensor Settings Menu.
f) Scroll until “Blower” is displayed.
g) Press Sel to display the Blower menu.
h) Press the Sel utton to display the availa le Blowers.
i) Scroll thru the Blowers until the desired “Blower” is displayed.
The interface ca le will e a serial num er until you rename it.
j) Press Sel. An * appears next to the name to indicate the
Blower is assigned to the Senor.
k) Press ∏ to return to the previous menu.
l) Set the Target Temperature in the STOKER.

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STOKER Control Mode, continued from page 5
5) Setting up the Savannah Stoker
a) Connect the interface ca le to the Savannah Stoker. Refer to
the instructions that came with the ca le.
) On the Savannah Stoker lower the target temperature (SV) to
180°;
c) Alternately, if you do not want to change the set temperature,
place the Savannah Stoker in Manual Mode (See 5.2) and
lower the output value to 17.
d) O serve the grills temperature on the Savannah Stoker (PV).
If the temperature is constantly descending elow the Target
Temperature the interface ca le has not een properly
assigned to the Pit Sensor as a Blower. Repeat Step 4 a ove.
Congratulations! Your STOKER is now controlling your pellet grill.
Go ahead; give it a try from your easy chair, your neigh or’s house, the
grocery store, or work. Access from the internet requires your STOKER
to e setup with an accessi le IP address. Refer to the documentation
for the STOKER found on www.rocks ar que.com
6) Returning control to the Savannah Stoker:
a) Turn off the STOKER.
) Unplug the interface ca le,
c) If the FAN is on low, return the FAN to normal speed.
d) Set the desired temperature on the Savannah Stoker
e) If in Manual Mode press A/M KEY to return to Automatic Mode
TIPS:
We recommend not running the STOKER elow 200°F.
When the Target Temperature is elow 250°F, etter temperature
control can e achieved with the FAN on medium speed.
CAUTION: If the temperature of the grill is constantl
dropping below the Target Temperature then the cause
is most likel due to the interface cable not being
properl assigned to the Pit Sensor as a Blower. Repeat
Step 4 above.
Precautions should be taken in the event that a grease
fire occurs when the grill is unattended maintaining a
safe distance from combustible materials at all times.
NOTES: Do not e concerned if the temperature readings of the
STOKER and the Savannah Stoker do not match ecause the
characteristics of the sensors are different. Support documentation for
the STOKER® Power Draft System is availa le from Rock’s Bar-B-Que.
www.rocks ar que.com.
StokerLog is a PC Application written y Amir Majidimehr that can e
used as an alternate to the STOKER’s we rowser interface. StokerLog
adds many features: Learns the characteristics of your ar ecue; Chart
and save your cook data; Set alarms on your computer; Ramp
temperatures up/down y time or food temperature; and more. The
author posts on the Virtual We er Bulletin Board http://tvw .com in the
Automatic Temperature Control Systems area. Discussion and download
information is found there.
StokeMaster and BBQ Monitor are iPhone Apps used to monitor and
make changes to the STOKER.
6. Operational Parameters
6.1 Operational Parameters.
The Savannah Stoker has various operational parameters. The default
values will control most pellet grills with satisfactory results. In some
instants the values may need to e changed to achieve etter results.
Some users may also want to tweak the parameters. One example is
changing the cycle time when smoking at 180°. Increasing the cycle time
(t) will produce more smoke ut will also increase temperature swings.
Other parameters the user needs to access: “AT” to start Auto-Tune,
“OutL” to change the auger’s minimum runtime; OutH to change the
maximum auger runtime; and FanS to change the fan speed.
6.2 Changing Parameter Values.
When in Display Mode 1, press/hold the SET KEY for 2 seconds to enter
Display Mode 3. Display Mode 3 is where the values of the various
operation parameters can e manually changed. The (PV) display shows
the parameter name, the (SV) display is the current value. Use ▲ and
▼ to modify the current value. Press/release the SET KEY to advance
to the next parameter. After the last parameter is displayed,
press/release the SET KEY to exit Display Mode 3. All of the new
parameter values are automatically stored.
6.3 Operational Parameters Defined.
Figure 3 elow shows the system Operational Parameters in order as
they appear when paging through them as outlined a ove (6.2). Beside
each parameters name is a rief Description, Setting Range, Initial
Setting value, and Remarks. There is no retrieval of the default values
once changed. If you need to restore the default values they have to e
reset manually.
Figure 3.
Operational Parameters
NAME Description Setting Range Initial Setting Remarks
IGN Ignitor OFF temp 100-200 °C or °F 130
H Hysteresis Band 0~50.0 °C or °F 5
At Auto tuning 0~3 3 See 6.3.2
IIntegral 0~9999 Seconds 140
PProportional 1~9999 ° 25
dDerivative 0~2000 Seconds 35
tCycle time 2~125 Seconds 20 See 6.3.4
Sn Input type Pt, K Pt See 6.3.5
Pb Sensor Cali ration
Offset -50+50 °C or °F 0 See 6.3.6
OutL Output low limit 0~100 % 17
OutH Output high limit 0~100 % 80
C-F Temp Display C, F F See 6.3.8
FAnS Fan Speed 1,2,3 3 See 6.3.9
Fant Fan off Temperature 100-150 120 See 6.3.10
See 6.3.3
See 6.3.7
See 6.3.1

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Operational Parameters Defined, continued from page 6
6.3.1 “IGN” and “HY” Control the Igniter’s ON/OFF Temperatures
The parameters IGN and HY are used together to control the igniter’s
functions.
IGN parameter: The Igniter’s ON temperature.
HY parameter: The Hysteresis Band is used to protect the igniter from
cycling ON/OFF to rapidly.
How it works:
When smoker starts from cold, the Igniter will e on. As the pellets
light and the temperature inside the cooking cham er rises the Igniter
will go OFF when temperature inside the cooking cham er reaches
IGN + HY. If the fire goes out due to an un-intentional reason, the
temperature will drop. The Igniter will turn ack ON when
temperature drops to elow the IGN setting and will go off again
when the temperature reaches IGN + HY.
6.3.2 “At”Auto-Tune
Parameter “AT” is used to start the Auto-tune process.
At=1 Sets Auto-Tune in delayed start. The Auto-tune process is
delayed until the A/M KEY is pressed. This is the preferred
method to start auto-tune.
At=2 Auto-tune will start in 10 seconds.
At=3 Normal controller operation. After auto-tune is complete the
controller automatically sets the value to 3.
When to Run Auto-tune:
In most cases the controller is very adaptive and works well with the
default parameter values for P,I,D, ut every grill and cooking
conditions are different. If temperature swings at 250°F are
consistently greater than 10-15° then running Auto-tune may improve
the controller’s performance y determining new values for the PID
parameters.
Preferred Method to Start Auto-tune:
1) Write down you current values for I, P, and D for future reference.
2) Set the target temperature (SV) in the 250°to 275°F range.
3) Let the grill’s temperature sta ilize for 20-30 minutes.
4) Set At=1
5) Start Auto-tune y pressing the “A/M” KEY when the temperature
reading (PV) is a ove the target temperature ut is descending.
6) The “At” sym ol will link in the lower display (SV) during the
Auto-tune process.
7) If you need to stop the Auto-tuning process, press and hold the
“A/M” KEY for a out 2 seconds until the "At" sym ol stops
linking in the lower display window.
During the Auto-tune process the controller will execute 2-3 cycles.
The microprocessor in the controller will analyze the period,
amplitude, and waveform of the temperature oscillations and
calculate the optimal PID control parameter values. When Auto-tune
is complete the controller will return to performing accurate artificial
intelligence control using the new values.
If the Auto-tune results are not satisfactory, you can manually fine-
tune the PID constants for improved performance. Or perform auto
tune again. Sometimes the controller will get etter parameters.
6.3.3 PID Control Parameters Explained.
Please note the controller uses an enhanced version of PID control
algorithms. Tuning of the controller is different than traditional PID
controllers. The parameters are explained elow.
Before adjusting any of the PID parameters, we recommend running
Auto-tune as outlined in section 6.3.2. Before making adjustments to the
PID parameters always write down your current settings. After making
changes let the grill sta ilize for 30-45 minutes and evaluate the results.
What works est at 250° may not give the same result @180°. Keep
good notes.
Proportional Band “P”
The unit is in degrees.
This parameter controls the output of the controller ased on the
difference etween the measured and set temperatures. The larger
the “P” value means the weaker the action (lower gain). For
example, if P=20, the proportional and is 20 degrees. When the
PV reading is 20 degrees or more elow the set point (SV), the
controller will have 100% output (or the value of OutH, see 6.3.7).
When the temperature is 10 degrees elow the set point, the output
is 50%. When the temperature is equal to the setting, the controller
will have 0% output (assuming integral and derivative functions are
turned off). This constant also affects oth integral and derivative
action. Smaller P values will make oth integral and derivative
action stronger.
Typical values for “P” would e in the range of 20-40°F
If you change from Fahrenheit to Celsius, divide “P” y 1.8.
When changing “P” use small steps of 1 or 2.
Integral time “I”
The unit is in seconds.
This parameter controls the output of controller ased on the
difference etween the measured and set temperature integrated
with time. Integral action is used to eliminate temperature offset
( oth a ove and elow set point, SV). A larger num er means
slower action. e. g. assuming the difference etween the measured
and set temperature is 10 degrees and remains unchanged, the
output will increase continuously with time until it reaches 100%.
When the temperature fluctuates more than 15° (when a ove 250°)
an increase of the integral time may e needed. Decrease if the
controller is taking too long to eliminate the temperature offset.
When I=0, the system ecomes a PD controller.
Typical values for “I” would e in the range of 80-300 seconds, ut
the recommend setting for “I” is 4 times the value of “D”, I=Dx4.
If you change “D” also change “I”
Derivative time “D”
The unit is in seconds.
Derivative action contri utes to the output power ased on the rate
of temperature change. Derivative action can e used to minimize
the temperature overshoot y responding to the rate of change. The
larger the num er, the faster the action will e, e.g. when the
cooking cham er door is opened, the temperature will drop at very
high rate. The derivative action will change the controller output
ased on the rate of change rather than the net amount of change.
This will allow the controller to act sooner.
Increases to “D” will decrease overshoot, and improve settling time,
Typical values for “D” would e in the range of 20-75 seconds.
When changing “D” use small steps of 2-3.
If you change “D” also change “I” to 4 times the value of “D”, I=Dx4.

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Operational Parameters Defined, continued from page 7
6.3.4 “t” C cle time
Cycle time “t” is a time period (in seconds) the controller uses to
calculate the auger’s runtime. This is also known as the duty cycle.
Default is 20 seconds.
Example: If the cycle time parameter is set to t=20, and the controller
has determined the output for the next cycle should e 25%, the auger
will run for 5 seconds at the start of the next cycle and will e off for the
remaining 15 seconds of the cycle.
Notes: The default value for the cycle time is 20 seconds. This gives the
est performance for most stock configured grills. The controller also
runs the auger a minimum amount each duty cycle to maintain the fire
much like a pilot light. The minimum amount is controlled y parameter
“OutL”, and the maximum limit is controlled y parameter “OutH”.
If the cycle time is less than 20 seconds the auger may not run long
enough during each duty cycle to maintain the fire. Before lowering the
value of either the cycle time or OutL, refer to section 6.4 “How to
Determine the Lowest Sta le OutL Value”.
Larger cycle times typically give larger temperature swings except on
large insulated cookers where a cycle time of 45 or 60 may have to e
used.
6.3.5 “Sn” Sensor Input Selection
Sn is used to define the type of input sensor used.
Pt = The default value for the temperature sensor (PT1000 RTD)
shipped with the controller and for the sensor used with the stock
controller.
K = K-Type thermocouple.
6.3.6 “Pb” Sensor Calibration Offset
Pb is used to set an input offset to compensate the error produced y
the sensor. Use this to cali rate the sensors PV reading.
6.3.7 “OutL” and “OutH” Auger Runtime Limits
OutL and OutH are runtime limits of the auger. The value is a
percentage of the total cycle time, parameter “t”.
OutL is the minimum % of the cycle time the auger will run at the start of
each cycle. Default is 17%. A minimum run time is required to maintain
the fire. See the top of the next column. Example: With a cycle time t=20,
and OutL=17, the auger will run for 17% of the 20 second cycle time or
3.4 seconds.
OutH is the maximum % of the cycle time the auger will run.
Default is 100%. The high limit is used to help reduce temperature
overshoots that will occur at start-up, after the cooking cham er door is
opened, and after the target temperature is increased. The default value
works well with most grills. On small grills etter performance is achieved
with a lower value of 70 or 80.
CAUTION:
A pellet grill requires a minimum amount of fuel feed
per c cle time to maintain the fire.
If OutL is too low the fire will go out; too high and the smoking
temperature will e too hot on very hot days. The default value
will give satisfactory results with most stock pellet grills. If you
need to change the OutL value refer section 6.4.
6.3.8 “C-F” Selecting Fahrenheit or Celsius
Parameter C-F is used to change etween Celsius and Fahrenheit.
F= Fahrenheit (default)
C= Celsius
If changing to Celsius, Change the value of “P”, See Section 6.3.3
6.3.9 “FAnS” Fan Speed
FAns is used to change the fan speed.
3= Normal fan speed
2= Medium Fan Speed
1= Low Fan Speed. (not recommend except for cold smoking)
6.3.10 “Fant” Fan Shut Off Temperature
The unit is degree. When the controller is turned off, the fan will
continue to run until the cooking cham ers temperature is cools down to
the temperature set y Fant. For example, if the Fant is set to 130, the
display will flash etween "Hot" and “current smoker temperature", until
the smoker temperature drops to elow 130 degree.
6.4 How to Determine the Lowest Stable Value for OutL .
1) Start the grill normally. Set the target temperature to 225°F. Let the
temperature sta ilize for 20-30 minutes.
2) Change the parameter values of: t=20 and OutL = 10.
3) Change the controller to Manual mode. See section 5.2
4) Press the ▼or ▲KEYs to set the value in the lower display to 17.
5) The grill’s temp will slowly lower until it sta ilizes. This could take
30-45 minutes or longer. If the grill’s temperature (PV) drops elow
160° raise the output value y 2.
6) After the temperature ecomes sta le; take the average
temperature; then, do one of the following.
a) If the average is etween 170-180°, do nothing.
You have a found the stable value for OutL.
Enter the lower displa value as the OutL parameter value.
) If a ove 180° lower ▼the SV value y 1, retest
c) If a ove 190° lower ▼the SV value y 2, retest
d) If elow 170° raise ▲the SV value y 1, retest
e) If elow 160° raise ▲the SV value y 2, retest