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BURNER'S ADJUSTMENT & CHECKS
CAUTION: GAS MAY BE EXPLOSIVE UNDER CERTAIN
CONDITIONS. TAKE ALL NECESSARY
SAFETY MEASURES WHEN WORKING WITH YOUR BURNER
· Check that you have the correct burner
installed according to your fuel. (LPG or Natural Gas is marked
on burner and on valve's 1" piping).
LPG and Natural Gas burners look the same but LPG Burner's
Combustion Head has a small extra orifice installed and LPG
gas valve's adjustment is different.
1. Check the right sequence of the burner components (Figure
"1")
2. Check all piping for leakages.
3. Make sure that your gas line is providing at least:
- 25 pounds per hour of LPG (3.5 normal cfm) or
- 9 normal cfm of NATURAL gas without pressure drop or pressure
fluctuation.
On natural gas appliances you may use a gas pressure stabilizer
if you
have experienced serious pressure fluctuations on your gas
line.
4. Adjust your pressure regulator to ~12 " (0.45 PSI)
for LPG or Natural Gas.
If your gas line is not equipped with pressure gauge you can
use the measuring point(11) (Figure"3") on burners
safety valve to connect a pressure gauge. Close the manual
supply valve and make sure that the pressure does not drop.
Wait approximately 5 minutes.
This test checks the proper closing of the electrovalves.
Note: Small differences in Gas pressure at your pressure regulator
are acceptable.
Serious Gas pressure fluctuations at your pressure regulator
will affect burner's capacity (supplied Btus/hr).
Gas pressure increase or decrease at your pressure regulator
will accordingly increase or decrease Burner's
capacity.
Head are properly adjusted for the required capacity according
to the table.
It is not recommended to exceed 12'' pressure with the burner
in operation.
5. Open manual supply valve.
6. Start the VCU's fan and turn on burner's switch.
7. Set the DB thermostat 5 o F higher than indicated temperature
so it orders burner to fire.
8. Wait for approx. 50-60 sec for the burner to run its selftest
program and fire.
9. When regulating for 400.000 BTU/H ,the gas pressure gauge
(point 10 figure "1") on burner's
ramp (after the valves) must indicate for 400.000 Btus/hr
:
-When LPG 6.1" ( 0.22 PSI ) (15.5 mbars)
-When Natural Gas 1.6" ( 0.06 PSI ) (4.0 mbars)
If you want to readjust burner's capacity :
10. Remove the plastic cover (9A) on operating valve (9) and
adjust the burner's head pressure
(Figure "4") according to table "1". Mount
plastic cover on valve after adjustment.
NOTE : Although burners are delivered factory adjusted at
~400.000 Btus/hr it is necessary
to Check and Adjust them again when installing them on the
VCU's following table's 1 recommendations.
If you want to change (increase or decrease) burner's capacity
,you must adjust operating valve's pressure and additionally
the burner's Air damper and Combustion head according to table
"1".
You can measure accurately pressure on the burner's measuring
points using appropriate accurate pressure gauge.
11. After adjusting air damper's (20) opening, mount again
burner's cover and run a combustion test with burner's cover
on place
O2 = 2.5 - 3 %, CO=0ppm, CO2 = 10% - 13% and smoke level C=0.
Recommended Flue Gas temp. from 360o F(smaller barns) with
5 hp fan motors, up to 500-550o Fmax
(bigger barns) with 10hp fan motors when ~85o -100 o F DRY
BULB Temp. in the barn.
FOR YOUR SAFETY AT SHORT INTERVALS:
- CHECK ALL PIPING AND CONNECTIONS FOR LEAKAGES ACCORDING
TO APPROPRIATE STANDARDS.
- CAUTION : GAS MAY BE EXPLOSIVE UNDER CERTAIN CONDITIONS.
INSTALL APPROPRIATE GAS DETECTORS AND SECURE APPROPRIATE VENTILATION
.
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