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CDL Venturi, Owner'S Manual, Page: 8 / 14

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8

CDL Maple Sugaring Equipment inc.

OPERATION OF THE EVAPORATOR

Before firing the evaporator

1.  Make sure the outlet of the tank feeding the evaporator is at least 12” higher than the sap 

level in the flue pan and that the tank is hooked up properly to the back of the rear float box.

2.  Install a syrup thermometer on each syrup pan.  Make sure they are calibrated by dipping 

them in boiling water and adjusting the temperature at 0 degree.

3.  Open the rope operated stack covers.

4.  Open the sap valve from the sap tank to the evaporator.  Fill the flue pan 2” above the flues.  

5.  Open the front float box valve and fill the syrup pans 2” deep by adjusting the float in the 

front float box. 

6.  After the start of the evaporator, using the float boxes, stabilize the level in each pan.  We 

recommend 1” in the flue pan and between 1 ½” and  2” in the syrup pans.

Light the evaporator

1.  Lighting the evaporator is done with the Venturi shutoff.

2.  Completely open the front grill.

3.  Using small dry wood and paper, light the evaporator.

4.  Wait until you get a good burn.

5.  Fill the combustion chamber (1” from the pans).

6.  Start the Venturi system.

7.  Leave the Venturi system running at all time, even when you fill the chamber with wood.

8.  Adjust the draft with the front grill.  Try to maintain a base stack temperature of 750°F.

Summary of Contents for Venturi

Page 1: ...OWNER S MANUAL VENTURI EVAPORATORS Version 1 0 14 01 2020 All rights reserved Les Équipements d Érablière CDL inc ...

Page 2: ... problem upon receipt of this product please immediately contact CDL or your local representative FINDING INFORMATION Make a record for future use Brand _ ______________________________________________________ Purchase Date ________________________________________________ Model Number ________________________________________________ Serial Number ________________________________________________ Se...

Page 3: ...or and its contents all walls and rafters should be at least 24 from all points of the smoke stack If you need to put it closer to the wall a heat barrier ceramic blanket for example should be installed Also make sure that your steam and smoke stacks have a clear path to the roof of the building avoid rafters Your ceiling should be high enough for you to raise the hoods safely with a cable and pul...

Page 4: ...led tighten the nuts on the legs 4 The 2 wide Venturi evaporator has a fixed Venturi system on the smoke stack It only requires a 110 volt plug in 5 All the Venturi evaporators 2 1 2 and wider have a Venturi system that can be installed remotely to lower the noise level You just have to install an adaptor and enough pipe to hook up the blower to the smoke stack Try to minimize air flow restriction...

Page 5: ...to lean the brick against the wool on each side of the arch Here s what the final product should look like 3 Let the cement dry for 24 hours 4 It s now time to cure the cement and the bricks Fill the pans with water as if you were going to boil sap Start a fire and bring the temperature inside the burning chamber between 400 F and 500 F for an hour Do not start the Venturi system during this opera...

Page 6: ...nd the level s Hook the sap concentrate line from the tank to the back of the rear float box The bottom of the tank needs to be at least 12 higher than the maximum level in the evaporator Don t forget to put Teflon tape on the threaded parts to avoid leaks 3 Install the base stack on the back of the evaporator 4 Install the first section of smoke stack the one with the Venturi system on top of the...

Page 7: ...r combustible material The use of any unauthorized combustible will void the warranty To optimize combustion the best length for the wood used in the Venturi evaporator is 20 The grates inside the burning chamber are 20 long So with 20 logs we get the maximum benefit of the air drawn in the burning chamber The quality of the wood that will be burned is an important factor in the performance of the...

Page 8: ... pan 2 above the flues 5 Open the front float box valve and fill the syrup pans 2 deep by adjusting the float in the front float box 6 After the start of the evaporator using the float boxes stabilize the level in each pan We recommend 1 in the flue pan and between 1 and 2 in the syrup pans Light the evaporator 1 Lighting the evaporator is done with the Venturi shutoff 2 Completely open the front ...

Page 9: ... off syrup every time the temperature gets to 7 degrees above the boiling point It s possible that the draw off temperature may vary over time This is caused by variations in the atmospheric pressure Verify regularly your syrup using hydrometer a densimeter or a refractometer to make sure you have the right sugar content 5 As your confidence level increases you can lower the liquid level in the pa...

Page 10: ...k is too high there is too much pressure on the float box Move the tank or install a pressure control float box Sap turns to syrup in the 1st syrup pan It can happen when you start the evaporator Draw off enough syrup to get it to the front and distribute what was drawn off in the flue pan This will get the movement forward going The heat in the chimney is too hot the base stack turned red or the ...

Page 11: ...tside walls of the pan you can use a commercial oven cleaning product cold oven It will dissolve the syrup without damaging the pans To bring back the shiny finish use an industrial glass foaming cleaning product IMPORTANT Between seasons if there is ANY trace of acid left in a pan it will be filled with pin holes at the beginning of the next season QUANTITY OF WATER IN THE FLUE PAN Dimension Heig...

Page 12: ...rheat Under the pan and between the flues use a flue brush to remove as much soot as possible In between season storage 1 Put all your pans on wood blocks to let air circulate in the arch and under the pans Too much humidity can cause damage 2 Remove any deposits inside the pan with a good acid wash If necessary brush all the flues inside and outside with the appropriate brush and a pressure washe...

Page 13: ...e of the evaporator 4 Revenue losses due to syrup quality 5 Service calls which do not involve malfunction or defect in materials or workmanship or used other than in accordance with the provided instructions 6 Service calls to correct the installation of your evaporator or to instruct you how to use your evaporator 7 Expenses for making the evaporator accessible for servicing such as the removal ...

Page 14: ...l expenses or loss or revenues caused by any event covered by this warranty Some states and provinces do not allow the exclusion or limitation of incidental or consequential damages or limitations on the duration of implied warranties so these limitations or exclusions may not apply to you This written warranty gives you specific legal rights You may also have other rights that vary from states to...

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