Burner Adjustment, Checking Gas Input - Slant/Fin V-180 Installation And Operating Instructions Manual

V
ICTORY
Figure 12. IID System with Honeywell VR8204 or VR8304
Gas Valve
8. Turn on all electric power to the appliance.
9. Set thermostat to desired setting.
10. If the appliance will not operate, follow the instructions
"To Turn Off Gas To Appliance" and call your service
To Turn Off Gas to Appliance
technician or gas supplier.
1. Set thermostat to lowest setting.
2. Turn off all electric power to the appliance if service is
to be performed.
3. Turn gas control knob clockwise
DO NOT force.
III. BURNER ADJUSTMENT
A. Adjust gas input rate:
1. Consult gas supplier for higher heating value of gas
(Btu/cu.ft.).
2. Set thermostat high enough so that boiler will
remain on while checking rate.
3. Measure manifold pressure at 1/8" tapping. Correct
manifold pressure for gas used is printed on boiler
rating plate. NOTE: Gas pressure may be adjusted
by turning pressure regulator screw on combination
gas valve (turn clockwise to increase pressure,
counterclockwise to decrease pressure).
a. Input for PROPANE is approximately at rating
shown on rating plate when manifold pressure is
9-1/2" water column.
b. Input for NATURAL GAS is approximately at rat-
ing when manifold pressure is 3-1/2" water col-
umn, but should be checked on the gas meter:
Btuh Input = Btu/cu. ft. x cu. ft. metered in 3 min-
utes x 20
Example 1:
For 1000 Btu/cu.ft. gas, this becomes:
Btuh Input = cu. ft. metered in 3 minutes
x 1,000 Btu/cu.ft. x 20
Example 2:
For 1050 Btu/cu.ft. gas, this becomes:
Btuh Input = cu. ft. metered in 3 minutes
x 1050 Btu/cu.ft. x 20
4. The higher* heating value of gas varies substantially for
different localities. Consult with Slant/Fin's Technical Ser-
vice Dept. for re-orificing procedures if any of the following
apply:
cu. ft./hr. of 1000 Btu/cu. ft.
to "OFF".
B. Main Burners
C. Main Burner Ignition Checkout and Pilot Adjustment.
a. Boiler (burner) is overfiring. CAUTION! National
Fuel Gas Code (ANSI Z223.1-latest edition) does
NOT permit firing at a higher input rate than the
input rate indicated on the boiler rating plate in
order to avoid hazardous conditions such as explo-
sion or carbon monoxide poisoning.
b. Poor higher* heating value of gas is causing the
actual input to be substantially lower than the
rating plate indication.
* "Higher heating" value of gas is commonly
known as "heating value".
The gas metered in 3 minutes to obtain rated input for
each boiler model, using 1000 Btu/cu.ft. gas, is tabulat-
ed in gas rate table.
Boiler rated input in
Natural Gas
33
60
90
120
150
180
1. Fire the boiler continuously for at least 15 minutes,
to reach burner operating temperature.
2. Observe the flames, all burners. The base of all
flame jets should be blue. The tips should be blue
shading to orange. NOTE: Dust, disturbed by any
movement, will cause bright orange flames. Wait
for dust to settle.
3. For one burner, close the air shutter until some of
its flame jet tips turn yellow-white, indicating insuffi-
cient primary air. Then open shutter until whitish
tips disappear completely. Set all burner shutters to
the same opening. Observe to make sure that no
yellow-white tips appear over any portion of the
flame. Small yellow tips at the pilot location are
permitted.
NOTE: This adjustment method gives MINIMUM
primary air setting for safe combustion. DO NOT
attempt to make this adjustment unless burners are
at operating temperature. Adjustment should be
made with burner access panel in final operating
position. Use of a mirror may be helpful to observe
flames. Note that burner ports are on top of main
burner tube.
1. The pilot flame must not smother or snuff out when
tested as follows:
a. Main burner ignition from cold start-repeat.
b. Continued operation of main burner.
c. Main burner ignition with appliance at maximum
operating temperature after prolonged operation.
NOTE: Observe operation of the pilot burner with
appliance doors in the final operating position. Use
of a mirror may be helpful.
13
Cubic Feet Gas Consumption
1000 Btu/cu. ft. gas, in
3 minutes, at rated input
1.65
3.00
4.50
6.00
7.50
9.00