L&L VENT-SURE DOWNDRAFT KILN VENT INSTRUCTIONS
ventsure-instruct.pdf
REV: 8/1/2017
Page 5
©
2017
L&L Kiln Mfg, Inc. 505 Sharptown Rd, Swedesboro NJ 08085 856.294.0077 F:856.294.0070 [email protected] hotkilns.com
DRILL CHART
MODEL
CUBIC FT
NO OF
HOLE
HOLES DIA
FUEGO
1.5
1
1/4”
e23S
4.7
2
1/4”
e23T, SM23T, EQ23T
7.0
2 1/4”
e28S
6.9
2
1/4”
e28T, SM28T, EQ2827
10.3
3
1/4”
JD18, E18S, LB18
2.6
1
1/4”
JD18X, E18T
3.9
1
1/4”
JF23
4.7
2
1/4”
J230
7.0
2
1/4”
J236, EQ2836
9.4
3
1/4”
J245
11.75
3
1/4”
J2918
6.9
2
1/4”
J2927
10.3
3
1/4”
J2936
13.8
4
1/4”
J2945
17.2
5
1/4”
X1818
3.4
1
1/4”
X1827
5.1
2
1/4”
XB2318
5.0
2
1/4”
X2327
8.1
2
1/4”
X2336
10.8
3
1/4”
X2345
13.5
4
1/4”
XB2818
7.8
2
1/4”
X2827
11.7
3
1/4”
X2836
15.6
4
1/4”
X2845
19.5
3
5/16”
XB3218
10.0
3
1/4”
X3227
15.0
4
1/4”
X3236
20.0
3
5/16”
X3245
25.0
4
5/16”
TB2318
9.7
3
1/4”
T2327
14.6
4
1/4”
T2336
19.4
3
5/16”
T2345
24.3
4
5/16”
TB3418
13.8
4
1/4”
T3427
20.7
3
5/16”
T3436
27.6
5
5/16”
T3445
34.5
6
5/16”
EL2424
8.0
2
1/4”
EL2427
9.0
3
1/4”
EL2436
12.0
3
1/4”
EL2448
16.0
4
1/4”
EL2848
20.0
4
5/16”
EL3048
25.0
5
5/16”
OPERATION
1. Plug blower cord into 120 Volt receptacle. (Note: 220-
240 volt models may be different).
2. Close all kiln apertures such as peepholes unless you
very specifically want more air vented.
3. Turn on Vent with the in-line switch on the power cord.
4. Close the lid and fire. For heavy loads with lots of
fumes you may want to avoid firing faster than 150°F
per hour to prevent the generation of more fumes than
the system can eliminate.
5. Use the flow control on the Bypass Box to modify the
flow of exhaust - a larger flow control opening reduces
the flow of exhaust fumes from the kiln, and a smaller
flow control opening increases the exhaust.
ADJUSTING THE BYPASS SYSTEM
The sliding adjuster allows you to fine adjust the amount of
venting that is done to your kiln. It is easy to adjust but hard
to know just how to adjust it. The problem is that there are
many factors that contribute to the amount of “pull” required.
For instance, the amount of fumes that are being given off
by your specific work is one factor. Some clays have a lot
of carbon in them; others do not. Depending on the size of
the load, and the ingredients in the clay/glaze, there will be
more or less fumes generated. Another factor is the “static
pressure” in your vent ducts. If you have a lot of curves,
90 degree bends, or long runs of duct this will increase the
static pressure (back pressure) and hence increase the
need for more venting force. One suggestion is to start with
the valve in the half open position and see what happens.
The Smoke Method:
1) With power disconnected from the kiln and with the kiln
empty, turn the vent on.
2) Start with the bypass valve in the fully closed position.
This will give it the maximum suction in the kiln.
3) Light a piece of paper on fire or something that will create
smoke. Blow it out, and hold it near the cracks around the
closed lid.
4) If the smoke is being pulled into the kiln around these
door cracks, open the Bypass (decreasing flow from the
kiln) until the smoke stops being pulled in, then back up the
valve slightly, so the draw increases just slightly again. Try
this when kiln is at about 100°F.
5) You can do the same test directly at the bottom hole with
the kiln open also to test the differential between the pull
