Green Air CD-6LP Liquid Propane CO2 Generator 6 cu.ft. per hour
includes LP rated hoses
Generators are easily installed, dependable and efficient.
Carbon dioxide generators operate by burning carbonaceous fuels such as propane or natural gas. The burners used in Green Air Products CO2 generators are specially designed to maximize the production of CO2 and minimize heat as a by-product. Green Air Products generators provide CO2 far more economically than any other means of enrichment. A constant burning pilot is used to ignite the gas when the generator is turned on. A thermocouple is used to monitor the pilot flame. If the pilot flame is lost, a safety valve will close so that unburned fuel will not be released into the enclosure. CO2 Generator operations may be automatically functioned according to actual ambient values when installed in conjunction with the CDMC. This control device continually samples the level of carbon dioxide in the growing area and functions the generator whenever CO2 levels do not meet your predetermined values. Generators are easily installed, dependable and efficient. Transformer included. Operates on 110 VAC.
Principles of Carbon Dioxide Enrichment
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Carbon Dioxide Enrichment will dramatically increase the growth of green plants. Green plants use carbon dioxide ( CO2 ) and water in the presence of light to synthesize organic compounds. The plant then converts these organic compounds into elements that it can use (food). This process is called photosynthesis. If any of these ingredients ( CO2, water or light ) are at levels below what the plant can use for maximum efficiency, it will only be able to perform at that level and no greater. Adding carbon dioxide to a growing environment that is not receiving proper nutrients or is low on light will not produce the desired results. Similarly, plants that are receiving plenty of sunshine and nutrients will only perform as well as the ambient level of CO2 will allow. The ambient level of CO2 in the earth's atmosphere is generally between 300 and 600 ppm. Most plants receive far more water and energy in the form of sunshine than they can use. Increasing the CO2 in the growing area will let the plant use the excess water and energy that is stored in the leaves. The result is a substantial increase in the growth rate of any plant that uses chlorophyll in the process of photosynthesis. Enrichment should commence at sunrise or when photoperiod begins and refrain during darkness hours. The average CO2 level that is recommended is 1000 to 2000 parts per million (PPM). The object is to maintain a constant level in the atmosphere. You can run a small unit continuously during photoperiods or you can use a larger unit and time it to function periodically. Where exhaust requirements are frequent, the latter method is preferable. After the exhaust function the generator can be cycled to replenish CO2 quickly to maintain rapid plant photosynthesis. Use the operation time charts to determine the size of generator and the number of minutes of operation required for the level of CO2 desired. Frequency of recharge depends on the rate of consumption. For the greatest fuel economy and accuracy of recharge it is recommended that the Green Air Products CO2 Monitor Controller (CDMC) be used with all generator and emitter systems.
Choosing the right size Generator
CD-3 through CD-36
Carbon dioxide enrichment equipment and methods have improved as experience and the understanding of atmospheric control and plant physiology has advanced. Plant metabolism and growth rate are dependent on the available atmospheric CO2. Plants are keenly sensitive to CO2 variations and optimum values must be constant and precisely controlled. The method, timing, and size of equipment must be properly determined to provide maximum benefits and economy. Carefully follow the operation charts to choose the proper size generator for the cubic foot area. Keep the recharge times to a minimum for best results. Do not undersize the generator or optimum results may never be achieved.
This chart will give you minutes of operation required for areas and models shown. Top row of the chart represents the cu. ft. of area (Length x Width x Height) in the enclosure. Left column is model size. Model numbers represent maximum CO2 output per hour in cubic feet (CD-3 = 3 cu ft/hr). Example: A CD-6 will take 10 minutes to produce a CO2 level of 1000 ppm in a 1000 cu. ft. enclosure.
Large greenhouses logically require longer charge times and multiple units may be necessary. The CD-36 takes 1.66 min. per 1000 cu. ft. area. Therefore a 20,000 cu. ft. area would be 20 X 1.66 = 33.2 min. to charge to 1000 ppm. For this application this may be an acceptable charge time. The area should be charged as quickly as possible for maximum advantage. Charging the atmosphere quickly insures that the rapid photosynthesis process will not be interrupted and the plants growth rate reduced Five to ten minutes is a good charge time. Try not to exceed twenty minutes when possible although this is not always practical in very large spaces. Your microclimate will need to be recharged every one to four hours depending on how much atmosphere is lost due to natural convection or plant usage.
| CO2 Generator 1000 PPM Operation Time Chart |
| CU / FT |
100 |
200 |
400 |
600 |
800 |
1000 |
1200 |
1400 |
1600 |
1800 |
2000 |
| CD-3 |
2.00 |
4.00 |
8.00 |
12.00 |
16.00 |
20.00 |
24.00 |
28.00 |
32.00 |
36.00 |
40.00 |
| CD-6 |
1.00 |
2.00 |
4.00 |
6.00 |
8.00 |
10.00 |
12.00 |
14.00 |
16.00 |
18.00 |
20.00 |
| CD-12 |
.50 |
1.00 |
2.00 |
3.00 |
4.00 |
5.00 |
6.00 |
7.00 |
8.00 |
9.00 |
10.00 |
| CD-18 |
.33 |
.66 |
1.33 |
2.00 |
2.66 |
3.30 |
4.00 |
4.66 |
5.33 |
6.00 |
6.60 |
| CD-36 |
.17 |
0.33 |
0.66 |
1.00 |
1.33 |
1.66 |
2.00 |
2.33 |
2.66 |
3.00 |
3.30 |
| Based on 1000 ppm CO2 enrichment |
Click here for printable chart
Fuel Consumption
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This chart is used to decide how long a tank of propane will last. This chart is fairly self explanatory first you will look in the left column to pick a model, then follow it across to the propane tank size you have. The number that corresponds with the two selections will be the number of hours that you can operate the CO2 Generator.
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Generator Installation
WALL MOUNT
Bracket wall mount screw holes must be 10 inches center to center. Mount brackets to wall and housing will slip over screw heads and fit snug into slotted holes in housing back. This allows for easy removal of housing from wall brackets. Make certain bracket screws are secure in wall and use good judgment when choosing mounting location.
SUSPENDED
Use chain, eyebolts and ceiling hooks found in hardware pack. Hang unit from sturdy location at least 18 inches from ceiling. The unit must operate in level upright position. "CAUTION" Should unit fall during operation fire may result.
FREE STANDING
Remove four screws holding bottom plate on housing. Locate holes on bracket to match and replace screws .
OPERATING PROCEDURE
IGNITING PILOT BURNER
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1. Plug the transformer into a grounded 110 V timer and power source.
2. Depress the RED button located on the inside of the generator for 90 seconds to clear the air from the hose.
3. Once gas is present at the pilot let up button and wait 60 seconds for excess gas to clear from the housing. Now depress the RED button again and light the pilot burner. Maintain holding the button down for an additional 30 seconds to allow the thermocouple to heat to operating temperature.
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| 4. Push the front on-off switch to the "ON position. If your timer is also in the on position fuel will pass through the solenoid valve and the main burner will be ignited by the pilot flame. As your timer cycles on and off so will the main burner flame.
5. For the CD-18 and CD-36 , the brass needle valve may be used to adjust the flame size. This will increase the time that the unit needs to charge the space with CO2.
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FUEL HOOK-UP
Propane model
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2. Carefully thread the regulator flange nut in the tank valve counterclockwise with your fingers until you feel the flange seat. Tighten firmly with adjustable end wrench. DO NOT USE PLIERS! Fasten hose between regulator and generator gas inlet in same fashion.
3. Turn the propane tank valve to wide open "ON" position.
4. Check for gas leaks. A solution of 25% hand dish soap and 75% water in a spray bottle will work well for detecting gas leaks. Apply solution to all previously connected fittings. Bubbles will occur around loose connections. Always use two wrenches when tightening multiple fittings.
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| 1. For propane applications use a propane tank that has been filled to only 80% of it’s capacity. This is very important for all propane burning mechanisms. Failure to observe this common rule will make your generator hard to ignite and will not stay lit (refer to troubleshooting). |
Replacement LPG regulator and hose: GAP propane CO2 generators use a standard small appliance type propane regulator such as might be used with a small heater or barbecue. It can be obtained at most hardware or home improvement stores. Original equipment comes with a Marshall Brass model 140 LPG tank mount regulator. The outlet uses a 1/4 inch male pipe thread to 1/4 male hose fitting to facilitate a flexible hose connection between the regulator and the generator. The regulator inlet uses a standard LP tank POL fitting to connect to the LP tank. The fuel hose is a typical flammable gas type welding hose such as might be used with an acetylene welding torch. These parts are available at a welding supply store.
Specifications
| Specifications |
| CO2 Output |
CD-3 |
CD-6 |
CD-12 |
CD-18 |
CD-36 |
| LP |
NG |
LP |
NG |
LP |
NG |
LP |
NG |
LP |
NG |
| Cu Ft CO2 / Hr |
3.2 |
3.4 |
6.2 |
6.4 |
12.4 |
12.8 |
18.6 |
19.2 |
37.2 |
38.4 |
| Pounds CO2 / Hr |
.376 |
.388 |
.753 |
.776 |
1.51 |
1.56 |
2.27 |
2.33 |
4.54 |
4.66 |
| Max BTU / Hr |
2183 |
2172 |
4366 |
4343 |
8733 |
8686 |
13098 |
13029 |
26196 |
26058 |
| Fuel Consumption |
| Cu Ft / Hr |
1.03 |
2.01 |
2.05 |
4.02 |
4.1 |
8.04 |
6.15 |
10.06 |
12.3 |
20.12 |
| high-wide-deep (inches) |
12-10-5 |
12-10-5 |
15-12-7 |
15-12-7 |
15-12-7 |
15-12-7 |
15-12-7 |
15-12-7 |
15-12-12 |
15-12-12 |
| Weight (lbs) |
9 |
9 |
12 |
12 |
14 |
14 |
16 |
16 |
27 |
27 |
Shipping
Weight (lbs) |
11 |
11 |
14 |
14 |
16 |
16 |
18 |
18 |
30 |
30 |
| Transformer 110 / 12vdc 500 mA center positive |
If you have any questions, feel free to ask.
Shipping & Handling is $20.00 for this item
Hawaii, Alaska, and International shipping will be Extra.
Please email us for a international shipping quote - Service@aqualightsonline.com
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