stayfreshfreezedry.com
1
Stay Fresh Home Freeze Dryer
MODEL 4H11560US
stayfreshfreezedry.com
2
1. Specifications ......................................................................................................................... 4
2. Installation Guide ................................................................................................................... 6
3. Freeze-Drying Process ............................................................................................................ 9
Freezing ...................................................................................................................................... 9
Main drying ................................................................................................................................ 9
Final drying ................................................................................................................................. 9
4. Food Preparation ................................................................................................................. 10
5. Automated Freeze-Drying .................................................................................................... 11
Freeze-drying unfrozen food without the temperature probe ................................................ 12
Freeze-drying unfrozen food with temperature probe ............................................................ 14
Freeze-drying frozen food without temperature probe .......................................................... 16
Freeze-drying frozen food with temperature probe ................................................................ 18
Freeze-drying candies .............................................................................................................. 20
Increase or decrease final dry hours ........................................................................................ 22
Pause and resume the drying process ..................................................................................... 24
What to do after drying is complete ........................................................................................ 25
Troubleshoot vacuum error messages ..................................................................................... 27
6. Defrosting ............................................................................................................................. 29
7. Advanced Freeze-Drying ...................................................................................................... 31
Manual freeze-drying ............................................................................................................... 31
Pre-set curve freeze-drying ...................................................................................................... 32
8. Freeze-Dryer Settings ........................................................................................................... 34
Set parameters ......................................................................................................................... 34
Download data ......................................................................................................................... 34
Set temperature ....................................................................................................................... 34
System reboot .......................................................................................................................... 34
Touch calibration ..................................................................................................................... 35
Reset time ................................................................................................................................ 35
stayfreshfreezedry.com
3
9. Vacuum Pump Oil Change .................................................................................................... 36
10. Touch Screen Info ................................................................................................................. 37
Main-menu ............................................................................................................................... 37
Auto-freezedry-start ................................................................................................................ 38
Auto-freezedry-setting ............................................................................................................. 39
Auto-freezedry-freezing ........................................................................................................... 41
Auto-freezedry-maindry ........................................................................................................... 43
Auto-freezedry-finaldry ............................................................................................................ 43
Auto-freezedry-finaldry-pause ................................................................................................. 44
Auto-freezedry-complete ......................................................................................................... 44
Preset-curve-drying .................................................................................................................. 45
Function-test ............................................................................................................................ 47
Defrosting-setting .................................................................................................................... 47
Defrosting ................................................................................................................................. 48
Defrosting-complete ................................................................................................................ 48
Settings ..................................................................................................................................... 49
Cable-connection-warning ....................................................................................................... 50
Vacuum-leak-warning .............................................................................................................. 50
Vacuum-pressure-abnormal .................................................................................................... 51
Vacuum-not-reached-warning ................................................................................................. 51
stayfreshfreezedry.com
4
1.
Specifications
○
1
Touch screen controller
○
7
Ventilation grille
○
2
Acrylic door
○
8
USB port
○
3
Door gasket
○
9
Drain valve
○
4
Tray shelf
○
10
Main power inlet
○
5
Vacuum port
○
11
Main power switch
○
6
Vacuum valve
○
12
Vacuum pump power outlet
stayfreshfreezedry.com
5
Inside the chamber, there are three cables: one for power, one for shelf temperature, and one
for the temperature probe. The temperature sensors are linked by a three-pin connector, while
the power is connected using a two-pin connector. The cables for power and tray temperature
are bundled together for convenience.
Avoid unplugging the power and sensor cables unless necessary to prevent damage.
Table 1 Technical specifications
Number of trays
4
Tray size
W 8 in. x D 20 in. x H 0.75 in.
Cold trap temperature
-40F
Rated current
15A
Power
115v/60Hz
Weight
165 lbs.
Dimension
W 20 in. x D 26 in. x H 31 in.
stayfreshfreezedry.com
6
2.
Installation Guide
The freeze dryer is designed for indoor use only and performs best in a temperature-controlled
room with temperatures ranging from 60F to 75F. Avoid using the freeze dryer in rooms where
the temperature exceeds 80F. Proper ventilation is necessary when operating the freeze dryer.
To ensure proper operation and safety, keep at least three inches of clearance between the
back of the freeze dryer and the wall, and at least six inches of clearance between the freeze
dryer and the walls on the left and right sides.
The freeze dryer requires a dedicated circuit and a 110V 15-amp outlet that must be within five
feet of the machine. Please ensure that the outlet is in good working condition and meets
electrical requirements before connecting the freeze dryer.
Installation steps:
Step 1.
Unpack the delivery box and ensure that all items on the packing list are present. Position the
freeze dryer in the appropriate location as described in the manual.
Step 2.
Remove the oil cap and use the funnel to fill the vacuum pump with oil until the oil level in the
sight glass reaches the middle line. Take note that the oil level will not immediately change
when pouring in the oil, but it will rise quickly once it starts to rise. After filling, replace the oil
cap and position the vacuum pump to the left side of the freeze dryer.
stayfreshfreezedry.com
7
Step 3.
Connect the power cord to the wall outlet and the other end to the back of the freeze dryer (○
10
main power inlet on page 4). Plug the vacuum pump cord to the back of the freeze dryer (○
12
vacuum pump power outlet on page 4). Turn on the vacuum pump switch on the back of the
vacuum pump. Refer to the following for the generic schematic of ON/OFF statuses for the
switch.
Step 4.
Connect one end of the PVC vacuum hose to the freeze dryer (○
5
vacuum port on page 4) and
the other end to the vacuum pump. Tighten the connection using the hose clamps.
stayfreshfreezedry.com
8
Step 5.
Close the vacuum valve (○
6
vacuum valve on page 4) and the drain valve (drain valve on page 4).
Refer to the following for the Open/Close statuses for the valve.
Step 6.
Connect the drain hose to the drain valve (○
9
drain valve on page 4). Place the other end of the
hose in a water bucket (not provided).
Step 7.
Turn on the power switch at the back of the freeze dryer (○
11
main power switch on page 4). The
touch screen should light up and display the main menu. Assign a name to your freeze dryer by
pressing the top left corner of the touch screen.
Allow the freeze dryer to settle for 24 hours before using it for the first time. Refer to Section 5
of the manual for instructions on how to run the automated freeze-drying process.
stayfreshfreezedry.com
9
3.
Freeze-Drying Process
The freeze-drying process is divided into three stages: freezing, main drying, and final drying.
Freezing
The freezing stage duration varies depending on the food's type, weight, and thickness, taking
anywhere from 6-15 hours for unfrozen food and 2-4 hours for frozen food. During this stage,
the cold trap temperature drops gradually to around -40F, and only the compressor runs. Frost
may be visible on the interior chamber surface, and condensation may form on the acrylic door
and gasket.
Main drying
The main drying stage begins automatically when the preset freezing time, shelf temperature,
or food temperature is reached, as explained in the Auto-freeze-dry-setting in Section 10.
Alternatively, you can start the drying process by pressing the 'Drying' button. The vacuum
pump operates for a set duration at the beginning of this stage, and the chamber pressure
drops to or below 550mTorr. The heater is then turned on to maintain the pressure at the initial
target pressure, and the patented freeze-drying algorithm is initiated.
During the constant-pressure phase, the pressure remains constant, while the shelf
temperature gradually increases. Once the target shelf temperature is reached, the algorithm
enters the constant-temperature phase, during which the shelf temperature is maintained at a
constant level, and the vacuum pressure gradually decreases. This cycle repeats until the
maximum shelf temperature is reached.
The compressor, vacuum pump, and heater are all running continuously during the main drying
stage, and ice rings may appear on the chamber's interior surface.
Final drying
The final drying stage begins when the maximum temperature is reached or when a preset food
temperature measured by the temperature probe is reached (if the probe is in use). These
indicators suggest that most of the moisture has been extracted from the food. The default
final dry duration is seven hours. The drying algorithm adjusts the final dry time automatically
when the temperature probe is in use. Extra final dry hours can be added manually if necessary.
During the final drying stage, the compressor, vacuum pump, and heater operate similarly to
the main drying stage. When the drying is complete, the heater and vacuum pump are turned
off, and the compressor continues running to keep the chamber cool.
stayfreshfreezedry.com
10
4.
Food Preparation
To prepare food for freeze-drying:
1. Wash the food thoroughly to remove any dirt or debris. Freeze drying won’t kill bacteria
in the food.
2. Cut the food into small pieces if possible, for better drying results. For solid foods, cut
them into pieces that are less than half an inch thick.
3. For liquid or semi-liquid foods, pour them evenly onto the trays.
4. Ensure that foods of similar type and thickness are on each tray for even drying.
5. Avoid mixing frozen and unfrozen foods in the same batch.
6. Foods with high moisture levels should be in one batch for efficiency reasons, as the
drying time will depend on the moisture level of the foods in the same batch.
7. Note that oily foods may not be suitable for freeze-drying, as the process only removes
water from the food and the oil may go rancid after packaging in a mylar bag.
stayfreshfreezedry.com
11
5.
Automated Freeze-Drying
Press the ‘FreezeDrying’ button on the main menu to enter the automated freeze-drying mode.
The automated freeze-drying process may vary slightly depending on whether the food is pre-
frozen or if you're using the temperature probe.
For a more detailed description of the automated freeze-drying process, refer to the following
sections. Each section includes steps that require your action and information enclosed in
boxes. Touch screen names may be underscored in each step, and you can find further details
in Section 10. Touch Screen Info.
stayfreshfreezedry.com
12
Freeze-drying unfrozen food without the temperature probe
Step 1.
Inspect and make sure there is no sign of ice or water in the bottom of the chamber and in the
groove of the door gasket.
Step 2.
Load trays with unfrozen food, insert the trays onto the shelves, and close the acrylic door.
Step 3.
Close the vacuum valve. Remove any residual water in the drain pipe, using the brush (refer to
Section 6 for more details) and close the drain valve.
Step 4.
Press the ‘FreezeDrying’ button on the touch screen to go to the Auto-freezedry-start
screen. Then press the ‘Settings’ button to go to the Auto-freezedry-setting screen. Adjust
trigger conditions that automatically triggers drying to begin. Use the default setting for
beginners. Press the ‘Back’ button to return to the Auto-freezedry-start screen.
Step 5.
Press the ‘Start’ button to go to the Auto-freezedry-freezing screen and the compressor will be
turned on.
Note that the ‘Drying’ button will be disabled for one minute after pressing the ‘start’
button. You can still adjust freezing drying parameters using the ‘Settings’ button on the
right bottom during the freezing stage.
Once the default trigger conditions are met or the ‘Drying’ button is pressed, the freeze
dryer will automatically start the drying process and transition to the Auto-freezedry-
maindry screen.
Upon completion of the main drying stage, the freeze dryer will proceed to the final dry
stage and switch to the Auto-freezedry-finaldry screen. During this stage, you have the
option to increase or decrease the final dry hours. For beginners, it is recommended to
use the default setting.
Step 6.
After the final dry stage is finished, the vacuum pump will stop and the motorized ball
valve will close automatically. The screen will switch to the Auto-freezedry-complete
screen and beep for 30 seconds. In case you're not around when the drying process is
finished, the trays might get excessively cold since the compressor will still be running. If
needed, use the 'Warm Tray' button to heat up the trays.
stayfreshfreezedry.com
13
When the final dry stage is completed, open the vacuum valve to normalize the pressure, then
open the acrylic door. Check if the food is completely dry on each tray.
All pieces of food should be warm immediately after drying is complete if the default
maximum shelf temperature is used. Press the ‘Back to Final Dry’ button to go to the
Auto-freezedry-finaldry-pause screen if more final dry hours are needed. Use the up
arrow to add extra final dry hours to enable the ‘Final Dry’ button. Then press the ‘Final
Dry’ button to restart the drying process.
If the food is completely dry, press ’Exit’ to stop the compressor, seal the freeze-dried food in
the bags as soon as possible. Otherwise, read section ‘What to do after drying is complete’ and
follow the steps.
Step 7.
Remove ice in the chamber. Read Section 6 for defrosting.
Step 8.
Change/filter vacuum pump oil if needed. Check section 9 for details.
stayfreshfreezedry.com
14
Freeze-drying unfrozen food with temperature probe
Step 1.
Inspect and make sure there is no sign of ice or water in the bottom of the chamber and in the
groove of the door gasket.
Step 2.
Load trays with unfrozen food, insert the trays onto the shelves.
If the food consists of solid pieces, pick the largest piece on the second tray (from top to
bottom), and insert the temperature probe into the center of the piece. Place the piece back on
the tray. If the food is liquid/semi-liquid, immerse the temperature probe in the food.
Close the acrylic door.
Step 3.
Close the vacuum valve. Remove any residual water in the drain pipe using the brush (refer to
Section 6 for more details) and close the drain valve.
Step 4.
Press the ‘FreezeDrying’ button on the touch screen to go to the Auto-freezedry-start
screen. Then press the ‘Probe in use’ button.
Press the ‘Settings’ button to go to the Auto-freezedry-setting screen. Adjust the trigger
conditions that automatically triggers drying to begin. Use the default setting for beginners.
Press the ‘Back’ button to return to the Auto-freezedry-start screen.
Step 5.
Press the ‘Start’ button on the Auto-freezedry-start screen to enter the freezing stage.
Note that the ‘Drying’ button will be disabled for one minute after pressing the ‘start’
button. You can still adjust freezing drying parameters using the ‘Settings’ button on the
right bottom during the freezing stage.
Once the default trigger conditions are met or the ‘Drying’ button is pressed, the freeze
dryer will automatically start the drying process and transition to the Auto-freezedry-
maindry screen.
Upon completion of the main drying stage, the freeze dryer will proceed to the final dry
stage and switch to the Auto-freezedry-finaldry screen. During this stage, you have the
option to increase or decrease the final dry hours. For beginners, it is recommended to use
the default setting.
stayfreshfreezedry.com
15
Step 6.
After the final dry stage is finished, the vacuum pump will stop and the motorized ball
valve will close automatically. The screen will switch to the Auto-freezedry-complete
screen and beep for 30 seconds. In case you're not around when the drying process is
finished, the trays might get excessively cold since the compressor will still be running. If
needed, use the 'Warm Tray' button to heat up the trays.
When the final dry stage is completed, open the vacuum valve to normalize the pressure in the
chamber, then open the acrylic door. Check if the food is completely dry on each tray.
All pieces of food should be warm if the default maximum shelf temperature is used. Press
the ‘Back to Final Dry’ button to go to the Auto-freezedry-finaldry-pause screen if more
final dry hours are needed. Use the up arrow to add extra final dry hours to enable the
‘Final Dry’ button. Then press the ‘Final Dry’ button to restart the drying process.
If the food is completely dry, press ’Exit’ to stop the compressor, seal the freeze-dried food in
the bags as soon as possible. Otherwise, read section ‘What to do after drying is complete’ and
follow the steps.
Step 7.
Remove ice in the chamber. Read Section 6 for defrosting.
Step 8.
Change/filter vacuum pump oil if needed. Check section 9 for details.
stayfreshfreezedry.com
16
Freeze-drying frozen food without temperature probe
Step 1.
Pre-freeze the food on the trays in a deep freezer for over 24 hours to make sure the food is
completely frozen.
Step 2.
Inspect and make sure there is no sign of ice or water in the bottom of the chamber and in the
groove of the door gasket.
Step 3.
Close the vacuum valve. Remove any residual water in the drain pipe using the brush (refer to
Section 6 for more details) and close the drain valve.
Step 4.
Press the ‘FreezeDrying’ button on the touch screen to go to the Auto-freezedry-start
screen. Then press the ‘Frozen Food’ button to let the control algorithm know the food is
frozen.
Press the ‘Settings’ button to go to the Auto-freezedry-setting screen. Adjust the trigger
conditions that automatically triggers drying to begin. Use the default setting for beginners.
Press the ‘Back’ button to return to the Auto-freezedry-start screen.
Step 5.
Press the ‘Start’ button on the Auto-freezedry-start screen to enter the freezing stage.
The screen will jump to Auto-freezedry-freezing and the compressor will be turned on.
Note that the ‘Drying’ button will be disabled for one minute. You can still adjust freezing
drying parameters using the ‘Settings’ button on the right bottom during the freezing stage.
Step 6.
After allowing the freeze dryer to run for 1-2 hours, check the shelf temperature. Once it
reaches below -5F, proceed to load the freeze dryer with trays containing frozen food. Close the
acrylic door and then press the ‘Food in Chamber’ button.
The freeze dryer will start the drying process and jump to the Auto-freezedry-maindry
screen when any of the default trigger conditions are met or the ‘Drying’ button is
pressed.
When the main drying stage is completed, the freeze dryer will enter the final dry stage
and the screen jumps to Auto-freezedry-finaldry. You can increase or decrease the final
dry hours during the final dry stage.
Step 7.
stayfreshfreezedry.com
17
After the final dry stage is finished, the vacuum pump will stop and the motorized ball
valve will close automatically. The screen will switch to the Auto-freezedry-complete
screen and beep for 30 seconds. In case you're not around when the drying process is
finished, the trays might get excessively cold since the compressor will still be running. If
needed, use the 'Warm Tray' button to heat up the trays.
When the final dry stage is completed, open the vacuum valve to normalize the pressure, then
open the acrylic door. Check if the food is completely dry on each tray.
All pieces of food should be warm if the default maximum shelf temperature is used. Press
the ‘Back to Final Dry’ button to go to the Auto-freezedry-finaldry-pause screen if more
final dry hours are needed. Use the up arrow to add extra final dry hours to enable the
‘Final Dry’ button. Then press the ‘Final Dry’ button to restart the drying process.
If the food is completely dry, press ’Exit’ to stop the compressor, seal the freeze-dried food in
the bags as soon as possible. Otherwise, read section ‘What to do after drying is complete’ and
follow the steps.
Step 8.
Remove ice in the chamber. Read Section 6 for defrosting.
Step 9.
Change/filter vacuum pump oil if needed. Check section 9 for details.
stayfreshfreezedry.com
18
Freeze-drying frozen food with temperature probe
Step 1.
Disconnect the temperature probe in the chamber.
If the food is of solid pieces, pick the largest piece and insert the temperature probe into the
center of the piece. Place the piece back on the tray. If the food is liquid/semi-liquid, immerse
the temperature probe in the food.
Pre-freeze the food on the trays with the temperature probe in a deep freezer for over 24 hours
to make sure the food is completely frozen.
Step 2.
Inspect and make sure there is no sign of ice or water in the bottom of the chamber and in the
groove of the door gasket.
Step 3.
Close the vacuum valve. Remove any residual water in the drain pipe using the brush (refer to
Section 6 for more details) and close the drain valve.
Step 4.
Press the ‘FreezeDrying’ button on the touch screen to go to the Auto-freezedry-start
screen. Then press the ‘Probe in Use’ button and the ‘Frozen Food’ button to let the controller
know the food is frozen and the temperature probe is being used.
Press the ‘Settings’ button to go to the Auto-freezedry-setting screen. Adjust the trigger
conditions that automatically triggers drying to begin. Use the default setting for beginners.
Press the ‘Back’ button to return to the Auto-freezedry-start screen.
Step 5.
Press the ‘Start’ button on the Auto-freezedry-start screen to enter the freezing stage.
The screen will jump to Auto-freezedry-freezing and the compressor will be turned on.
Note that the ‘Drying’ button will be disabled for one minute. You can still adjust freeze-
drying parameters using the ‘Settings’ button on the right bottom during the freezing stage.
Step 6.
After allowing the freeze dryer to run for 1-2 hours, check the shelf temperature. Once it
reaches below -5F, proceed to load the freeze dryer with trays containing frozen food.
Reconnect the temperature probe in the chamber, ensuring that the female and male
connectors are clean and dry before connecting. Place the piece with the temperature probe on
the second tray from the top.
Close the acrylic door and then press the ‘Food in Chamber’ button.
stayfreshfreezedry.com
19
The freeze dryer will start the drying process and jump to the Auto-freezedry-maindry
screen when any of the default trigger conditions are met or the ‘Drying’ button is
pressed.
When the main drying stage is completed, the freeze dryer will enter the final dry stage
and the screen jumps to Auto-freezedry-finaldry. You can increase or decrease the final
dry hours during the final dry stage.
Step 7.
After the final dry stage is finished, the vacuum pump will stop and the motorized ball
valve will close automatically. The screen will switch to the Auto-freezedry-complete
screen and beep for 30 seconds. In case you're not around when the drying process is
finished, the trays might get excessively cold since the compressor will still be running. If
needed, use the 'Warm Tray' button to heat up the trays.
When the final dry stage is completed, open the vacuum valve to normalize the pressure in the
chamber, then open the acrylic door. Check if the food is completely dry on each tray.
All pieces of food should be warm if the default maximum shelf temperature is used. Press
the ‘Back to Final Dry’ button to go to the Auto-freezedry-finaldry-pause screen if more
final dry hours are needed. Use the up arrow to add extra final dry hours to enable the
‘Final Dry’ button. Then press the ‘Final Dry’ button to restart the drying process.
If the food is completely dry, press ’Exit’ to stop the compressor, seal the freeze-dried food in
the bags as soon as possible. Otherwise, read section ‘What to do after drying is complete’ and
follow the steps.
Step 8.
Remove ice in the chamber. Read Section 6 for defrosting.
Step 9.
Change/filter vacuum pump oil if needed. Check section 9 for details.
stayfreshfreezedry.com
20
Freeze-drying candies
Step 1.
Inspect and make sure there is no sign of ice or water in the chamber, shelving unit, and in the
groove of the door gasket.
Step 2.
Load trays with candies, insert the trays onto the shelves, and close the acrylic door.
Step 3.
Close the vacuum valve. Remove any residual water in the drain pipe, using the brush (refer to
Section 6 for more details) and close the drain valve.
Step 4.
Press the ‘FreezeDrying’ button on the touch screen to go to the Auto-freezedry-start
screen. Then press the ‘Candy’ button go to the setting screen. Adjust max shelf temperature
and final dry hours if necessary.
Step 5.
Press the ‘Start’ button to go to the Auto-freezedry-freezing screen and the compressor will be
turned on.
By default, the pump will start after 15 mins of compressor running, and the heater will
be activated after 15 mins of pump running. Note that the ‘Drying’ button will be disabled
for one minute after pressing the ‘start’ button.
Upon completion of the main drying stage, the freeze dryer will proceed to the final dry
stage and switch to the Auto-freezedry-finaldry screen. During this stage, you have the
option to increase or decrease the final dry hours. For beginners, it is recommended to
use the default setting.
Step 6.
After the final dry stage is finished, the vacuum pump will stop and the motorized ball
valve will close automatically. The screen will switch to the Auto-freezedry-complete
screen and beep for 30 seconds. In case you're not around when the drying process is
finished, the trays might get excessively cold since the compressor will still be running. If
needed, use the 'Warm Tray' button to heat up the trays.
When the final dry stage is completed, open the vacuum valve to normalize the pressure, then
open the acrylic door. Press the ‘Back to Final Dry’ button to go to the Auto-freezedry-finaldry-
pause screen if you want more final dry hours or if you want back-to-back batch runs. Use the
up arrow to add extra final dry hours to enable the ‘Final Dry’ button. Then press the ‘Final Dry’
button to restart the drying process.
stayfreshfreezedry.com
21
Step 7.
Remove ice in the chamber. Read Section 6 for defrosting.
Step 8.
Change/filter vacuum pump oil if needed. Check section 9 for details.
stayfreshfreezedry.com
22
Increase or decrease final dry hours
You may need to adjust the final dry hours in various scenarios. This can be done before
initiating the freeze-drying process, during the freezing stage, or during the final dry stage.
1. Adjust before the freeze drying process.
Press the ‘Setting’ button,
Adjust the number in the ‘Final dry hours’ box.
2. Adjust during the freezing stage.
Press the ‘Setting’ button on the bottom right corner,
stayfreshfreezedry.com
23
Adjust the number in the ‘Final dry hours’ box.
3. Adjust during the final dry stage.
Press the ‘INC’ (‘DEC’) button to increase (decrease) final dry hours. If you input ‘1’, the
final dry hours will be increased by 1 hour.
stayfreshfreezedry.com
24
Pause and resume the drying process
If you need to check the food inside the chamber while the drying process is ongoing, you can
pause the process by pressing the orange 'Drying' button during the main drying stage (shown
below). This will turn the button grey and stop the vacuum pump. Open the vacuum valve to
normalize the pressure in the chamber and then check if the food is dry. Once you're done,
close the vacuum valve and press the grey 'Drying' button to resume the main drying process.
If you are in the final dry stage (shown below), you can temporarily halt the final drying process
by pressing the orange 'Final Drying' button. This will cause the button to turn grey, and the
pump will stop. You can then open the vacuum valve to normalize the pressure in the chamber
and inspect the food. Once you’re done, close the valve and press the grey 'Final Drying' button
to continue with the final drying process.
stayfreshfreezedry.com
25
What to do after drying is complete
The below screen will show up when the drying process is complete,
Follow the steps,
Step 1: After the drying process is complete, check the shelf temperature to ensure that the
trays are still warm. If the shelf temperature is below the room temperature, indicating that the
drying process was completed at least a few hours ago, press the ‘Warm Tray’ button to warm
the trays. Wait for the shelf temperature to rise above the room temperature and press the
‘Warm Tray’ button again to stop it. Proceed to step 2.
Step 2: Open the vacuum valve and inspect the food to ensure it is completely dry. If the food is
dry and no further drying is necessary, press the ‘Exit’ button and immediately seal the freeze-
dried food. Otherwise, move to step 3.
Step 3: If the food requires further drying, return the trays to the freeze dryer and close all
valves. Press the ‘Return to FinalDry’ button to access the following screen. Press the ‘INC’
button to add additional drying hours (e.g., 4 hours). Once the ‘Final Drying’ button becomes
available, press it to restart the drying process.
stayfreshfreezedry.com
26
Follow the same steps above when the drying is complete again.
stayfreshfreezedry.com
27
Troubleshoot vacuum error messages
The majority of vacuum error messages occur during the first 10 minutes after the vacuum
pump is turned on. The controller checks for adequate vacuum levels at various points, and the
pressure reading usually drops to 1000 mTorr or lower within 10 minutes.
If the vacuum pressure does not reach the required level at any of these points, the freeze
dryer will stop the pump, beep, and switch to the Vacuum-not-reached-warning screen. Press
the 'Exit' button, and return the screen to the Auto-freezedry-freezing screen.
At this point, the drying process must be manually started again. But check for causes of
vacuum error before pressing the ‘drying’ button to start drying again,
1. Ensure that the room where the machine is located is properly ventilated, the
compressor fan is not blocked, and the room temperature does not exceed 80F when it
is running.
2. Ensure that the switch on the back of the vacuum pump is turned on if it's currently off.
3. Close the vacuum/drain valves if they're currently open.
4. If there is a gap between the door gasket and the door, open the door, pull the gasket
halfway out, and then close the door to ensure a proper contact between the gasket
and the door.
5. If there is a lot of condensation on the acrylic door, open the door, wipe dry the door
gasket and the interior surface of the door. Pull the gasket halfway out, and then close
the door to ensure no moisture trapped inside and a good contact between the gasket
and the door.
6. If the shelving unit is blocking the door gasket, push it all the way in, leaving a gap of 1/2
to 3/4 inches between the shelving unit and the door gasket when the door is open.
7. Use a sponge applicator or a mini air pump to drain any water in the drain line if it's
present.
8. Clean the gasket if there is any trapped water in the bottom of it. This typically happens
after the defrost cycle.
9. Keep freezing the food if it's not yet completely frozen, and inspect each tray to ensure
that the food is frozen.
10. Change the vacuum pump oil if it appears milky or cloudy, or if it has not been replaced
in a long time.
Once you have identified and addressed any of the issues listed above that may have caused
the vacuum error message, you can proceed by pressing the 'Drying' button again to initiate the
drying process.
In case the freeze dryer fails to achieve the desired vacuum level for the second time, press the
'Exit' button to switch the screen back to Auto-freezedry-freezing, and then press the 'drying'
button to initiate the drying process for the third time.
stayfreshfreezedry.com
28
However, if the vacuum level target is still not met for the third time, press the 'Exit' button
again. It is advisable to terminate the current freeze-drying session by pressing the 'Exit' button
located at the bottom left corner and identify the underlying cause of the vacuum error
message.
Follow the steps to check other potential causes of the vacuum error messages:
1. Press the 'function' button on the main menu and check the vacuum reading. If the
reading is low even without the pump being turned on, it may indicate loose wiring in
the vacuum sensor.
2. Press the 'function' button on the main menu and then press the 'ball valve' button. If
you do not hear a buzzing noise from the motor, the motorized ball valve may be
broken.
3. Perform a vacuum test by pressing the 'function' button on the main menu, followed by
the 'compressor' button. Wait for 90 minutes and check if the cold trap temperature is
below -30F and the shelf temperature is below 0F [Note if room temperature is higher
than 85F, the cold trap may not be able to reach -30F]. If not, there may be a freon leak
in the refrigeration system. If the temperature reading is normal, close all valves, press
the 'ball valve' button and then press the 'pump' button to turn on the pump. Wait for
30 minutes and check if the vacuum reading drops to 300 or lower. If not, the pump may
have failed.
4. Contact Stay Fresh's customer service for assistance in identifying the underlying cause
of the error messages.
stayfreshfreezedry.com
29
6.
Defrosting
Press the ‘Defrost’ button on the main menu to enter the defrosting mode after the freeze-
drying process is done.
Once you have removed the freeze-dried food from the chamber, proceed to open the drain
valve and close the acrylic door. Ensure that the drain hose is directed towards a water bucket.
Next, navigate to the Defrosting-setting screen by selecting the ‘Defrost’ button on the main-
menu screen.
On the Defrosting-setting screen, adjust the defrosting time and temperature to your desired
settings. Typically, a defrosting time of two hours at 130F is recommended. Once you have set
the parameters, press the ‘Start’ button to initiate defrosting. The Defrosting screen will display
the current shelf temperature and time elapsed.
After defrosting is complete and the screen reads Defrosting-complete, press the ‘Exit’ button
to return to the main-menu screen. Drain any remaining water from the bottom of the chamber
and use the brush to remove any residual water in the drain pipe.
To remove the residual water in the drain pipe, start by disconnecting the drain hose and
opening the drain valve. Use the brush as illustrated below and position the brush tip to collect
water from the pipe. Squeeze the brush tip to extract water, repeating the process until the tip
no longer collects any more water. Finally, reattach the drain hose to the drain valve.
stayfreshfreezedry.com
30
stayfreshfreezedry.com
31
7.
Advanced Freeze-Drying
Press the ‘Functions’ button on the main menu to enter the advanced freeze-drying screen.
Manual freeze-drying
Manual freeze-drying is only for advanced users. Improper use will void the warranty on the
vacuum pump.
The following is the typical manual freeze-drying process:
Step 1.
Turn on all switches. Load the freeze dryer with trays of food. Close all valves and the acrylic
door. Make sure the vacuum hose is connected and sealed tightly.
Step 2.
Press the ‘Functions’ button to go to the function-test screen. Press the ‘Compressor’ button to
turn on the compressor. Monitor the shelf temperature (and food temperature if the probe is
inserted into the food). Move to Step 3 until the food is completely frozen. A good indicator is
that the shelf or food temperature is below -5F.
Step 3.
Press the ‘Valve’ button to open the motorized ball valve.
Step 4.
Press the ‘Pump’ button to start the vacuum pump. Monitor the vacuum pressure reading.
Move to Step 5 until the value is below 400 mTorr.
Step 5. Set the target temperature value in the input box to the right of the ‘TS’ button. Press
the ‘TS’ button to turn on the temperature controller. Adjust the target temperature value as
the drying process progresses.
stayfreshfreezedry.com
32
Keep monitoring the vacuum pressure reading during the drying process. If the vacuum
pressure is higher than 550 mtorr, lower the target temperature to avoid damage to the
vacuum pump.
Step 6. When the drying is complete, press the ‘Valve’ button to close the motorized ball valve
and then press the ‘Pump’ button to turn off the vacuum pump. Open the vacuum valve and
then open the acrylic door to remove the freeze-dried food.
Press the ‘Back’ button to stop the freeze-drying process and go back to the main-menu.
Step 7.
Remove ice in the chamber. Read Section 6 for defrosting.
Pre-set curve freeze-drying
Preset temperature curve freeze-drying is only for advanced users. Improper use will void the
warranty on the vacuum pump.
The following is the typical freeze-drying process with preset temperature curve:
Step 1.
Turn on all switches. Load the freeze dryer with trays of food. Close all valves and the acrylic
door. Make sure the vacuum hose is connected and sealed tightly.
Step2.
Press the ‘Functions’ button to go to the function-test screen and then press the ‘Preset Curves’
button on the bottom left to go to the Preset-curve-drying screen.
Fill the temperature curve in the ‘Temp’ (first row below) and ‘Time’ (second row below) arrays.
There are nine slots for each array. Fill the desired shelf temperature in the ‘Temp’ array and
desired time period in minutes in the ‘Time’ array starting from the left. Below is the example if
you want to start with 0F and raise 10F every other 60 minutes,
0
10
20
30
40
50
60
70
80
60
60
60
60
60
60
60
60
60
When the drying process starts, the shelf temperature will be kept at 0F for 60 minutes, and
then at 10F for 60 minutes, and so forth. After 9 hours if the drying process is not stopped and
the shelf temperature will stay at 80F.
stayfreshfreezedry.com
33
Step 3.
Press the ‘Compressor’ button to turn on the compressor. Monitor the shelf temperature (and
food temperature if the probe is inserted into the food). Move to Step 4 until the food is
completely frozen. A good indicator is that the shelf (or food) temperature is below -5F.
Step 4.
Press the ‘Valve’ button to open the motorized ball valve.
Step 5.
Press the ‘Pump’ button to start the vacuum pump. Monitor the vacuum pressure reading and
the temperature readings. Move to the Step 6 until the vacuum pressure is low, e.g., 450
mTorr.
Step 6.
Press the ‘Run’ button to start the drying process. A green bar above the ‘Temp’ array indicates
where the current drying time and target temperature is.
Keep monitoring the vacuum pressure reading during the drying process. If the vacuum
pressure goes above 550 mtorr, lower the temperature in current slot to avoid damage to the
vacuum pump.
Step 7.
When the drying is complete, press the ‘Valve’ button to close the motorized ball valve and
then press the ‘Pump’ button to turn off the vacuum pump. Open the vacuum valve and then
open the acrylic door to remove the freeze-dried food.
Press the ‘Back’ button to stop the freeze-drying process and go back to the main-menu.
Step 8.
Remove ice in the chamber. Read Section 6 for defrosting.
stayfreshfreezedry.com
34
8.
Freeze-Dryer Settings
Press the ‘Settings’ button on the main menu to enter the system and freeze-drying setting
screen Settings.
There are six main buttons on the Settings screen,
Set parameters
Press the button ’FreezeDrying Setting’ to go to the freeze-drying parameter screens. The
default settings work for most the of the freeze-drying scenarios. Consult the manufacturer
before resetting any parameters.
Download data
To download data from the freeze dryer, first insert an empty memory stick into the USB port.
Ensure that the light on the memory stick blinks; if not, try a different memory stick. Next, press
the 'Download Data' button, which will prompt a pop-up window. Wait for the transfer to
complete and the pop-up window to disappear. If the touch screen controller reboots, try using
a different memory stick.
Set temperature
Press button ‘Set EnvTemp’ to set the actual room temperature, which will help recalibrate the
freeze-drying algorithm and improve its performance.
System reboot
Press the ‘System Reboot’ button to reboot the touch screen controller.
stayfreshfreezedry.com
35
Touch calibration
If the touch screen response is not accurate, press the ‘Touch Calibrate’ button to calibrate the
touch screen response. Use your finger to press the centers of all crosses following the numeric
order.
Reset time
Press the ‘Set Time’ button to adjust Year/Month/Day/Hour/Minute/Second and day of the
week.
stayfreshfreezedry.com
36
9.
Vacuum Pump Oil Change
For the standard oil vacuum pump, oil needs to be filtered after 2-3 cycles of freeze-drying or
when it becomes murky in the sight glass. If there is no moisture present in the oil, you can
reduce the frequency of oil changes.
Step 1.
Place a paper filter on the top of the plastic pitcher and add multiple layers of tissue paper on
the paper filter. Open the bottom valve of the vacuum pump and allow the oil to flow through
the filter. To speed up the process, open the oil fill cap and tilt the vacuum pump forward while
shaking it gently to ensure all the oil is released.
Step 2.
Wait for all the oil to pass through the filter. If the filtered oil at the bottom is clear with no
water, pour the oil back into the vacuum pump through a funnel. However, if the filtered oil is
murky or contains water, pour it into a separate container, replace the tissue paper, and repeat
the filtering process.
Step 3.
If the oil level in the vacuum pump is below the MIN level, add new oil to raise the level
between MIN and MAX.
stayfreshfreezedry.com
37
10.
Touch Screen Info
In the context that follows, screen names are indicated by an underscore, button names are
enclosed in quotes, a displayed number '888' is a placeholder for actual values, and a
timestamp 'YYYY/MM/DD HH:MM' is a placeholder for the actual date and time.
Main-menu
There are four buttons on the main-menu screen:
1) ‘FreezeDrying’ is the entrance to the patented automated freeze-drying process. The
screen will jump to auto-freezedry-start when this button is pressed.
2) ‘Defrost’ is the entrance to the defrosting process in order to remove the ice inside the
chamber when the freeze-drying run is completed. The screen will jump to defrosting-
setting when this button is pressed.
3) ‘Functions’ is the entrance to run tests on the condensing unit, the heater, the vacuum
pump, and the motorized ball valve. It also provides more options for advanced freeze-
drying: a manual freeze-drying process, a pre-set curve freeze-drying process. The
screen will jump to function-test when this button is pressed.
4) ‘Settings’ is the entrance to system settings and input parameters. The screen will jump
to settings when this button is pressed.
stayfreshfreezedry.com
38
Auto-freezedry-start
Press the ‘Settings’ button to access the auto-freezedry-setting screen and configure the drying
process. You can set parameters and trigger conditions for the drying process to start.
If you want to use the temperature probe, press the ‘Probe in use’ button, which will enable
the system to::
1. Determine when to initiate the drying process during the freezing stage. The trigger
condition, based on the probe temperature, will be displayed in the auto-freezedry-
setting screen.
2. Decide when to transition to the 'Final Dry' stage during the main drying stage. By
default, if the probe temperature is above 50F, the program will switch to the final dry
stage.
Insert the probe into the largest food piece's center during use when the probe is being used. If
you don't press the ‘Probe in use’ button, you can still use the probe to monitor the
temperature.
Press the ‘Frozen food’ button if the food was frozen before being loaded into the freeze dryer.
This button suspends all trigger conditions in the auto-freezedry-setting screen, which will be
reactivated when the ‘Food in Chamber’ button is pressed in the auto-freezedry-freezing
screen.
Press the ‘Exit’ button to go back to the main-menu.
Press the ‘Start’ button to start the compressor to cool the chamber. The freeze dryer will enter
the freezing stage, and the screen will jump to the auto-freezedry-freezing screen. Note that
the ‘Start’ button may be disabled in certain situations, such as when the compressor has been
turned off or the temperature probe is not plugged in when using the ‘Probe in use’ button. In
such cases, the button will be re-enabled after a specified time or when the probe is plugged in.
stayfreshfreezedry.com
39
Auto-freezedry-setting
This screen shows two sets of settings: conditions that trigger main drying, and the drying
parameters.
There are three conditions that trigger main drying:
1. Hours of freezing, which is turned off by default.
2. Shelf temperature, which measures the temperature of the silicone heater under the
second tray. The default temperature is -5F, and this condition is turned on by default.
3. Probe temperature, which measures the food temperature where the probe is inserted.
The default temperature is 5F, but this condition is shown and turned on only when the
'Probe in use' button is pressed in the auto-freezedry screen.
if any of the above conditions is turned on and met, the drying process will be triggered, and
the vacuum pump starts. You can adjust the parameters or turn on/off (green/grey) any
conditions by pressing the off/on button to the right of the arrows. Here are the three
examples of the setting,
1. If you want to start drying only when the shelf temperature reaches -20F, you can set
the temperature to -20 and press the green button to turn off the probe temperature.
2. If you want to start drying only when a certain amount of freezing time has elapsed,
such as 15 hours, you can set the freeze time to 15 and press the adjacent button to
turn it on (green), while turning off any other green buttons.
3. If you want to start drying when the probe temperature reaches -20F or the freezing
time exceeds 13 hours, you can set the probe temperature to -20 and the freeze time to
13, turn off the green button for the shelf temperature, and turn on the button for the
hours.
stayfreshfreezedry.com
40
If all the conditions are turned off, you will need to manually press the 'Drying' button to start
the drying process in the auto-freezedry-freezing screen.
You can adjust three parameters for the drying process: the initial target pressure, max shelf
temperature, and final dry hours.
The initial target pressure is the pressure level that the heater will maintain when the main
drying begins. The max shelf temperature is the highest temperature allowed for the silicone
heater under the second tray. The default settings are 550 mtorr and 120F, respectively.
Usually, higher initial target pressure and max shelf temperature result in a faster freeze-drying
process, but this also increases the risk of water vapor entering the vacuum pump or the food
being thawed or shriveled.
The default setting for final dry hours is seven hours. The longer the final dry hours, the higher
the likelihood that the food will be completely dry.
stayfreshfreezedry.com
41
Auto-freezedry-freezing
This screen indicates the freeze dryer is in the freezing stage.
The ‘Auto’ sign in the top left indicates that trigger conditions set in the auto-freezedry-setting
screen are active. When any of the conditions are met, the drying process will be started, and
the screen will jump to the auto-freezedry-drying screen. If the ‘Auto’ sign is not shown (in the
cases where 1) no trigger condition is selected, or 2) the main drying is interrupted and you
come back to this screen again), you have to manually press the ‘Drying’ button to start the
drying process.
In the center are two buttons ‘Freezing’ and ‘Drying.’ The ‘Freezing’ button highlighted in
orange indicates the compressor is running. The ‘Drying’ button is in grey, indicating that drying
has yet to start. If you are an advanced user, you can manually start drying by pressing the
‘Drying’ button when you know the food is ready for drying. In the case that all trigger
conditions are turned off, meaning that you plan to start drying manually, make sure the food is
completely frozen before pressing the ‘Drying’ button.
Below the two buttons are three temperature readings: ‘Trap’ (evaporator coil, indicates cold
trap temperature), ‘Shelf’ (temperature of the shelves that are holding the trays), and ‘Probe’
(food temperature when inserted in the food, otherwise the temperature where the probe is
located), and a vacuum pressure reading.
The cold trap temperature should reach -20F quickly and then slowly decrease to around -40F
during freezing. The shelf temperature slowly decreases from room temperature to below 0F
during the freezing stage. The probe temperature depends on the location of the probe. If it is
inserted in the food, it should show a slightly higher value than the shelf temperature but
follow the same trend.
The vacuum reading shows the vacuum pressure in the chamber. The pressure reading is
capped at 2000 mTorr. The number does not change until the pump starts and pulls the
vacuum below 2000 mTorr.
stayfreshfreezedry.com
42
Press the bottom-left ‘Exit’ button to stop the freezing process and go back to the main-menu.
When you press the ‘Frozen food’ button in Auto-freezedry screen, the ‘food in chamber’
button will show up in the bottom. After the frozen food is loaded on the trays in the chamber
and all valves are closed, press ‘Food in chamber’ to un-mask the trigger conditions set in Auto-
freezedry-setting screen.
Press the ‘Settings’ button to make changes to the freeze-drying settings same as seen in Auto-
freezedry-setting screen.
stayfreshfreezedry.com
43
Auto-freezedry-maindry
This is the main drying screen.
At the center of the screen, you will see two buttons labeled 'Freezing' and 'Drying.' The
'Freezing' button, highlighted in yellow, indicates that the compressor is currently operating to
cool the chamber. This button is purely an indicator. On the other hand, the 'Drying' button,
also highlighted in yellow, indicates that the vacuum pump is in operation, and the control
algorithm will turn the heater on and off as necessary.
Pressing the 'Drying' button will pause the drying process by turning off the vacuum pump,
causing the screen to switch to auto-freezedry-freezing. The time stamps above the two
buttons display the elapsed time for the freezing and drying stages.
Below the two buttons are the temperature readings and vacuum pressure mentioned in auto-
freezedry-freezing.
Once the primary drying stage is complete, the screen will automatically switch to Auto-
freezedry-finaldry.
Auto-freezedry-finaldry
stayfreshfreezedry.com
44
The final dry screen is similar to the auto-freezedry-maindry screen. The main differences here
are:
1) The button name becomes ‘Final Drying’ instead of ‘Drying.’
2) There are two extra buttons, ‘INC’ and ‘DEC’ to increase and decrease the final dry
hours.
3) The displayed time above the ‘Final Drying’ button is the countdown of the final dry
time.
Auto-freezedry-finaldry-pause
This screen is akin to the Auto-freezedry-finaldry screen, and you will see a 'Final Drying' button
that appears greyed out, indicating that the drying process is currently paused. Simply press the
'Final Drying' button to resume the process.
It's essential to keep in mind the following points: 1) When the countdown timer shows a
negative value, the 'Final Drying' button will be disabled. To enable the button, press the 'INC'
button to increase the final drying hours. 2) Before pressing the 'Final Drying' button, ensure
that all valves are securely closed.
Auto-freezedry-complete
This screen pops up and the vacuum pump stops when the drying is complete.
stayfreshfreezedry.com
45
Open the vacuum valve and wait for the pressure to be normalized in the chamber. Open the
door to check if the food on each tray is completely dry. If not completely dry and the food is
still frozen, put the trays back, close the door and press ‘Return to FinalDry.’ The screen will
jump to Auto-finaldry-pause screen. Follow the instructions on Auto-finaldry-pause screen to
resume drying.
After the completion of drying, the stainless-steel trays may be very cold to the touch. To
prevent injury and avoid attracting moisture, it is recommended to press the 'Warm Tray'
button, which will heat the trays to the max temperature.
Preset-curve-drying
This screen shows the operation and setting input for drying with a pre-set temperature curve.
The top three buttons control the compressor, the vacuum pump, and the motorized ball-valve.
The compressor and the pump buttons have a minute counter below. In the middle are the
temperature sensor readings and the vacuum pressure reading.
The 'Temp' and 'Time' arrays represent the target shelf temperatures and the duration in
minutes that each temperature should be maintained. For instance, in the hypothetical
example below, the shelf temperature is set to 50F for 60 minutes, then 55F for 120 minutes,
followed by 60F for 120 minutes, and ultimately 65F for 60 minutes, and so on. The final
segment is set to 110F for 60 minutes. Once the time for the last segment has elapsed, the
stayfreshfreezedry.com
46
control will maintain the shelf temperature at 110F until the 'Run' button is turned off. The
'Runtime' displays the number of minutes that the drying process has been in operation.
50
55
60
65
70
80
90
100
110
60
120
120
60
60
60
60
60
60
Press the ‘Exit’ button to go back to the function-test screen.
stayfreshfreezedry.com
47
Function-test
On this screen, you can access the function to test each component of the freeze dryer, such as
the compressor, vacuum pump, heater, and motorized ball-valve. Along with the buttons for
these components, there are temperature readings and vacuum pressure displayed.
Additionally, there is a minutes counter for each component that records the runtime.
Moreover, this screen also serves as the control panel for manual freeze-drying. The 'TS' button
allows you to set the target shelf temperature during the drying process. Under the 'TS' button,
you can see the time that 'TS' is pressed for drying.
Press the ‘Preset Curves’ button to enter the Preset-curve-drying screen.
Press the ‘Back’ button to go back to the main-menu.
Defrosting-setting
In the Defrosting-setting screen you can reset the time and target shelf temperature. Click the
‘Start’ button to start defrosting.
stayfreshfreezedry.com
48
Defrosting
This screen indicates the freeze dryer is in the defrosting mode and and it displays the amount
of time the freeze dryer has been in this mode, the preset defrosting time, and the current
temperature of the shelf.
Press the ‘Exit’ button to go back to the main-menu.
Defrosting-complete
This screen pops up when the defrosting is complete. Press the ‘Exit’ button to return to the
main-menu.
stayfreshfreezedry.com
49
Settings
There are six main buttons on the screen:
1) ‘FreezeDrying Settings’ - Press this button to adjust all the default parameters for
freeze-drying.
2) ‘Download data’ - This button is used to download the recorded freeze dryer status and
sensor readings.
3) ‘Set EnvTemp’ – Press this button to set the actual room temperature.
4) ‘System reboot’ - Press this button to reboot the touch screen.
5) ‘Touch calibrate’ - Press this button to recalibrate the touch screen if you have
inaccurate response using touch.
6) ‘Set time’ - Press this button to reset time.
stayfreshfreezedry.com
50
Cable-connection-warning
This warning pops up when the cable connecting the heater and shelf temperature sensor is
disconnected. Press the ‘Stop and exit’ button to return to the main menu.
Vacuum-leak-warning
This warning pops up during drying when the sensor detects an unusual drop in the vacuum
pressure. The vacuum pump stops as result of this warning. Press the ‘Exit’ button to return to
the freezing mode screen.
stayfreshfreezedry.com
51
Vacuum-pressure-abnormal
This warning pops up when the vacuum pressure reading is abnormal. Press the ‘Stop and exit’
button to the freezing mode or main menu screen.
Vacuum-not-reached-warning
If the vacuum pressure reading does not reach the benchmark values at different points, a
warning will appear when the vacuum pump is started. To return to the freezing mode screen,
press the 'Exit' button.
stayfreshfreezedry.com
52
If you have any questions, contact us via [email protected], or visit
stayfreshfreezedry.com.
+1 (424) 420 7534
Stay Fresh Technology LLC,
3768 Rockwell Ave, El Monte, CA, 91731
