Trane IntelliPak 1, Installation, Operation And Maintenance Manual, Page: 127 / 164

RT-SVX072A-EN 127
Ultra Modulating Burner Setup
IIm mp po orrtta an ntt:: It is necessary to measure gas pressure at
the following points listed below. Install the
necessary fittings prior to starting the
burner in the Manual Override.
• Inlet Pressure
• Main Gas Regulator outlet pressure
• Load Line Pressure
• Manifold Pressure
IIm mp po orrtta an ntt:: Important: Flue readings should be taken
from center of the flue and at least 4 inches
down from the outlet. See
Figure 99, p.
126 .
1. Program the following system components for
operation by scrolling through the user interface
displays:
a. Open the manual gas valve, located in the gas
heat section.
b. Set toggle switch located on heater control box
to ON.
c. Press Stop button on user interface.
d. Navigate to the Gas Heat Manual override
screen. See Figure 103, p. 128 . Set the
modulating percentage to 1% and enable the 1st
stage. Touch the Auto button in the top right
corner of the screen.
e. Turnrn the Supply Fan ON by the navigating to
the Manual Override Screen. Set the Fan speed
to 100%.
L Lo ow w F Fiirre e A Ad djju ussttm me en ntt
2. After the initial purge sequence and once the
burner has started, look through the burner sight
glass for the appearance of light (from the flame) in
the holes of the burner plate. If light is visible
through ALL the holes, low fire is correctly set
within the operating range of the burner. If light is
not visible through all of the holes, turn the
adjustment screw on the ratio regulator. Refer to
the illustration in
Figure 104, p. 128 .
3. Use a flue analyzer to measure the oxygen (O
2
),
carbon dioxide (CO
2
), and carbon monoxide (CO)
levels in the flue gas.. If the measured O
2
level is
between 17.0%-19.0% and the CO
2
level is no more
than 400ppm (corrected to 3% O
2
), no adjustment is
necessary. If an adjustment is needed, turn the
adjustment screw on the ratio regulator. CCW to
increase O2, CW to decrease O2.
H Hiig gh h F Fiirre e A Ad djju ussttm me en ntt
4. Adjust the User interface to operate the furnace at
max firing rate (100%) or 2 nd Stage. Allow the
system to operate for 10 minutes.
N No otte e:: The burner capacity is controlled by the
combustion fan speed. This has been preset
at the factory and normally does not need
field adjustment.
5. Check the inlet pressure at the tap upstream of the
pilot regulator. Refer to the illustration in Figure
105, p. 128 . The inlet pressure should between 7.0"
to 14.0" w.c.
6. Check the outlet pressure of the main gas regulator
at tap on the upstream solenoid valve. Refer to the
illustration in
Figure 105, p. 128 . The outlet
pressure from the main gas regulator should be
6.0" w.c.
7. Check manifold pressure at tap closest to where the
valve train attaches to the burner. Refer to the
illustration in
Figure 106, p. 129 . Verify the manifold
pressure is 2.6"-2.9" w.c on 500 MBh, 1.6"-1.9" w.c.
on 850 MBh, and 2.1"-2.4" w.c. on 1000 MBh. If
manifold pressure is not within the specified range,
contact Large Commercial Technical Support for
information on how to adjust maximum fan speed
(FHi).
8. Use a flue analyzer to measure the oxygen (O
2
),
carbon dioxide (CO
2
), and carbon monoxide (CO)
levels in the flue gas. If the measured oxygen level
is between 3.0 to 5.0% and the carbon dioxide level
is between 8.5 to 10% and the CO is less than 100
PPM, no adjustment is necessary. If an adjustment
is needed, check the inlet gas pressure or the air
damper on the burner (closing will increase the CO
2
level). See Figure 107, p. 129 .
M Miid d F Fiirre e A Ad djju ussttm me en ntt
9. Adjust the User interface to operate the furnace at
mid firing rate (approx. 38%).
10. Check the load line pressure on the ratio regulator.
Using the Modulating Gas Heat Actuator screen
adjust the % value until load line pressure is at 2" w.
c.
11. Check manifold pressure at tap closest to where
valve train attaches to the burner. Refer to the
illustration in
Figure 106, p. 129 . Verify the manifold
pressure is 0.8 - 0.9" w.c. If adjustment is necessary,
turn the adjustment screw on the ratio regulator.
Refer to illustration in for the adjustment screw
location.
12. Program the burner for low fire operation (1%) and
recheck O
2
(or CO
2
) and CO values.
13. Press the STOP key on the user interface screen and
remove manual overrides to stop the system
operation.
U Un niitt S Stta arrttu up p