13
g. When pilot flame is proven, main burners will
light
h. Adjust valve pressure to 4.25” w.c.
i. Consult valve pamphlet in back of manual for
more detailed instructions
j.
Cycle boiler ON and OFF several times
3. Thermocouple Pilots (Diaphragm or Motorized
Gas Valves)
a. Turn boiler switch OFF
b. Attach pilot tubing and thermocouple if not
previously installed
c. Purge gas line
d. Turn OFF the main burner supply gas cock
e. Turn ON the pilot supply gas cock
f. Locate pilot switch control knob and turn to
PILOT
g. Light pilot while holding knob, then release.
Pilot should stay on. Refer to specific
instructions on pilot switch literature in back of
manual.
h. Turn boiler switch ON
i. With pilot lit, slowly open main burner supply
gas cock to allow burners to light
j. Adjust main pressure regulator for proper
pressure (4.25” w.c.)
k. Turn OFF boiler switch
l.
Turn ON boiler switch
m. Check for proper ignition and cycle several
times
4. Thermocouple Pilots (Combination Gas Valves)
a. Turn boiler switch OFF
b. Attach pilot tubing and thermocouple if not
previously installed
c. Purge gas line
d. Turn boiler switch ON
e. Position control know on valve to PILOT and
hold down
f. Light pilot and hold knob until thermocouple
heats up. If, after releasing knob, the pilot stays
on, turn knob to ON position. Burners should
light
g. Adjust valve pressure to 4.25” w.c.
h. Consult combination gas valve information
pamphlet in back of manual for more detailed
instructions
i.
Cycle boiler on and off several times
For warranty validation, complete start up
check list (included with boiler) and return it to
Lattner. Failure to return check list may void
warranty.
5. Check for Gas Leaks
Brush a soapy water solution on each connection in the
main gas and pilot gas lines. Look for bubbles. If there
are any gas leaks, shut off the main gas supply and fix
any leaks before continuing. Repeat steps 1 through 4.
Do not use a match or other types of fire to locate a gas
leak.
6. Adjust The Burners
Atmospheric draft burners can only be properly set up
by using combustion test equipment. Adjust air shutter
(on each individual burner) and gas pressure regulator
until burner objectives below are satisfactorily met.
7. Burner Tuning Objectives
The following measures are approximations only. Data
may vary by location, environment, fuel, gas pressure,
BTU content and more. Refer to burner manual for
more specific instructions, including low-NOx burner
instructions for California and Texas.
Constituent
Value
Gas Supply Pressure
4.25” w.c. (minimum)
Manifold Pressure
3.25” w.c. (minimum)
O
2
4.5% to 6.5%
CO
2
8% to 10%
CO
Less than 100 ppm
NO
x
Less than 60 ppm
Stack Temperature
400
°
F to 475
°
F
Efficiency
78% to 82%
8. Pressuretrols
Allow the boiler to reach its operating pressure. Check
the pressuretrols to be certain they’re are set as
described and functioning properly.
9. Level
Controls
Make certain the level control feeds water into the boiler
and maintains a proper water level.
10. Odor
It is normal for a new boiler to give an odor when it first
fires. This odor will generally go away within two days.
