Operating instructions
To Turn Off Gas To Appliance
1. Set the thermostat to lowest setting.
2. Turn off all electric power to the appliance if service is to
be performed.
3. Remove control access panel.
4. Turn gas control knob clockwise until knob stops,
then continue to "OFF". DO NOT force.
5. Replace control access panel.
BURNER ADJUSTMENT
A. Adjust gas input rate:
1. Consult gas supplier for higher* heating value of gas –
W/m
3
(Btu/cu.ft.)
2. Turn off all other gas appliances.
3. Set thermostat high enough so that boiler will remain on
while checking rate.
4. Measure manifold pressure at 3 mm (1/8") tapping. Cor-
rect 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, counterclock-
wise to decrease pressure).
i. Input for PROPANE is approximately at rating shown
on rating plate when manifold pressure is 241 mm
(9
1
/
2") water column.
ii. Input for NATURAL GAS is approximately at rating
when manifold pressure is 89 mm (3
1
/2") water column,
but should be checked on the gas meter:
Input = W/m
3
× m
3
metered in 3 minutes × 20
(Input = Btu/cu. ft. x cu. ft. metered in 3 minutes x 20)
Example #1
:
For 8.29 W/m
3
gas, this becomes:
Input = m
3
metered in 3 minutes × 8.29 × 20
(For 1000 Btu/cu.ft. gas, this becomes:
Input = cu. ft. metered in 3 minutes × 1000 × 20)
Example #2
:
For 8.70 W/m
3
gas this becomes:
Input = m
3
metered in 3 minutes × 8.70 × 20
(For 1050 Btu/cu.ft. gas, this becomes:
Input = cu. ft. metered in 3 minutes × 1050 × 20)
5. The higher heating value* of gas varies substantially for
different localities. Consult with Slant/Fin’s Technical
Service Dept. for re-orificing procedures if any of the
following apply:
GALAXY 13
i. Boiler (burner) is overfiring. CAUTION! National Fuel
Gas Code ANSI Z223.1-latest edition or CSA B149.1-
00 for natural gas and propane, 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 explosion or carbon monoxide
poisoning.
ii. 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 a “heating value.”
Gas Rate Table
The gas metered in 3 minutes to obtain rated input for each
boiler model, using 8.29 W/m
3
(1000 Btu/cu.ft.) gas is tabulated
below:
B.Main Burner
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 insufficient
primary air. Then open shutter until whitish tips disap-
pear 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 tempera-
ture. Adjustment should be made with jackets in final
operating position. Use of mirror may be helpful to
observe flames. Note that burner ports are on top of main
burner tube.
Figure 14
m
3
/hr cu.ft./hr. m
3
cu.ft.
2.1 75 0.106 3.75
2.8 100 0.142 5.00
3.5 125 0.177 6.25
4.2 150 0.212 7.50
5.0 175 0.248 8.75
5.7 200 0.283 10.00
6.4 225 0.319 11.25
7.1 250 0.354 12.50
7.8 275 0.390 13.75
8.5 300 0.425 15.00
9.2 325 0.460 16.25
9.9 350 0.496 17.50
10.6 375 0.531 18.75
BOILER RATED INPUT
8.29 W/m
3
(1000 Btu/cu. ft.)
Natural Gas
GAS CONSUMPTION
8.29 W/m
3
(1000 Btu/cu. ft.)
in 3 minutes, at rated input