Trane IntelliPak 1, Installation, Operation And Maintenance Manual, Page: 123 / 164

RT-SVX072A-EN 123
Unit. The control signal from the Symbio controller is 0
– 10V DC for modulating gas heat. The higher the
voltage signal, the higher the call for heat. For two
stage heat, a relay is energized per stage of heat
requested.
The gas heat controller manages the speed of the
combustion blower. The greater the combustion air
speed, the greater the call for gas and the higher the
firing rate of the heater. As the temperature setpoint is
reached, the modulating heat controller will cause the
combustion air speed to change to a lower firing rate
that matches the heat load of the space.
Two Stage and 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
• Manifold pressure (see Figure 101, p.
126
IIm mp po orrtta an ntt:: The flue reading should be taken from
center of the flue and at least 4 inches
down from the outlet. See
Figure 99, p. 126
.
Program the following system components for
operation by scrolling through the User interface
displays:
1. G Ga ass H He ea att
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 98, p. 124 for 2–stage and
Figure 103, p. 128 for modulating. “Ultra
Modulating Burner Setup,” p. 127 for
modulating. Set the modulating percentage to
1% and/or enable the 1
st
stage. Touch the Auto
button in the top right corner of the screen.
e. Turn the Supply Fan ON by the navigating to the
Manual Override Screen. Set the Fan speed to
100%.
2. L Lo ow w F Fiirre e O O2 2 A Ad djju ussttm me en ntt: After the initial purge
sequence and once the burner has started, run the
burner at low fire for 10 minutes to allow the burner
to stabilize.
3. Use a flue analyzer to measure the oxygen (O
2
),
carbon dioxide (CO
2
), and carbon monoxide (CO)
levels in the flue gas.Take several readings to
ensure burner operation is stable.
4. See Table 55, p. 124 for the required oxygen level
during LOW fire operation. If the measured oxygen
level is not within the specified range, turn the
adjustment screw on the ratio regulato
Refer to the illustration in Figure 100, p. 126 for
adjustment screw location. For high O2, increase ½
turn (CW). For low O2, decrease ½ turn (CCW)
5. H Hiig gh h F Fiirre e O O2 2 A Ad djju ussttm me en ntt:: 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 to allow the burner to stabilize.
6. Use a flue analyzer to measure the oxygen (O
2
),
carbon dioxide (CO
2
), and carbon monoxide (CO)
levels in the flue gas. Take several readings to
ensure burner operation is stable.
7. See Table 55, p. 124 for the required oxygen level
during HIGH fire operation. If the measured oxygen
level is within the specified range 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 air damper on the
burner (closing will increase the CO2 level). See
Figure 102, p. 126 for air damper location. For high
O2, close ½ notch. For low O2, open ½ notch.
8. If any adjustments were made during Low Fire O2
Adjustment and High Fire O2 Adjustment, repeat
Steps 1 through 7 to confirm oxygen levels for both
low and high fire are within specified range on
Table 55, p. 124 .
9. L Lo ow w F Fiirre e M Ma an niiffo olld d P Prre essssu urre e:: Adjust the User
interface to operate the furnace at low firing rate
(1%) and/or 1st Stage. Allow the system to operate
for 10 minutes to allow the burner to stabilize.
Check manifold pressure at tap closest to where the
valve train attaches to the burner.
10. See Table 55, p. 124 for the expected manifold
pressure during LOW fire operation. If manifold
pressure is not within the specified range, adjust P0
(ignition speed of blower) and P1 (low fire speed of
blower). See
“Adjusting P0, P1, and P2 via the
Siemens LME7 Built-in Display,” p. 124 for
instructions.
IIm mp po orrtta an ntt:: P0 and P1 should always match each other.
11. H Hiig gh h F Fiirre e M Ma an niiffo olld d P Prre essssu urre e:: 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 to allow the burner to stabilize.
Check manifold pressure at tap closest to where the
valve train attaches to the burner.
12. See Table 55, p. 124 for the expected manifold
pressure during HIGH fire operation. If manifold
pressure is not within the specified range, adjust P2
(high fire speed of blower). See
“Adjusting P0, P1,
and P2 via the Siemens LME7 Built-in Display,” p.
124
for instructions.
13. If any adjustments were made during Low Fire
Manifold Pressure and High Fire Manifold Pressure,
repeat Steps 9 through 12 to confirm manifold
U Un niitt S Stta arrttu up p