Trane IntelliPak 2 Series Скачать руководство пользователя страница 180

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180

RT-SVX24Q-EN

Heat Stages 1 & 2 (On)

Turn the 115 volt control circuit switch 4S24 located
in the heater control panel to the On position.

Open the manual gas valve, located in the gas heat
section.

2. Once the configuration for the appropriate heating

system is complete, press the NEXT key until the
LCD displays the “Start test in __Sec.” screen. Press
the + key to designate the delay before the test is to
start. This service test will begin after the TEST
START key is pressed and the delay designated in
this step has elapsed. Press the ENTER key to
confirm this choice.

3. Press the TEST START key to start the test.

Remember that the delay designated in step 2 must
elapse before the system will begin to operate.

4. Once the system has started, check the appearance

of the flame through the sight glass provided on the
front of the heat exchanger. In appearance, a
normal flame has a clearly defined shape, and is
primarily (75%) blue in color with an orange tip.

5. Check the manifold gas pressure by using the

manifold pressure port on the gas valve. Refer to

Table 63, p. 181

for the required manifold pressure

for high-fire operation. If it needs adjusting, remove
the cap covering the high-fire adjustment screw on
the gas valve. Refer to

Figure 139, p. 182

for the

adjustment screw location. Turn the screw
clockwise to increase the gas pressure or
counterclockwise to decrease the gas pressure.

6. Use a carbon dioxide analyzer and measure the

percentage of carbon dioxide in the flue gas. Refer
to the illustration in

Figure 138, p. 182

. Take several

samples to assure that an accurate reading is
obtained. Refer to

Figure 137, p. 181

for the proper

carbon dioxide levels. A carbon dioxide level
exceeding the listed range indicates incomplete
combustion due to inadequate air or excessive gas.

Combustion Air Adjustment (O

)

1. Use an oxygen analyzer and measure the

percentage of oxygen in the flue gas. Take several
samples to assure an accurate reading. Compare

the measured oxygen level to the combustion curve
in

Figure 137, p. 181

. The oxygen content of the flue

gas should be 4% to 5%. If the oxygen level is
outside this range, adjust the combustion air
damper to increase or decrease the amount of air
entering the combustion chamber. Refer to

Figure

142, p. 184

for the location of the combustion air

damper.

2. Recheck the oxygen and carbon dioxide levels after

each adjustment. After completing the high-fire
checkout and adjustment procedure, the low-fire
setting may require adjusting.

Low-Fire Adjustment (850 & 1100 MBH only)

1. Use the TEST initiation procedures outlined in the

previous section to operate the furnace in the low-
fire state (1st Stage).

2. Use a carbon dioxide analyzer and measure the

percentage of carbon dioxide in the flue gas. Refer
to the combustion curve in

Figure 137, p. 181

, Inset

A. Take several samples to assure that an accurate
reading is obtained. Refer to

Table 63, p. 181

for the

proper carbon dioxide levels. If the measured
carbon dioxide level is within the listed values, no
adjustment is necessary. A carbon dioxide level
exceeding the listed range indicates incomplete
combustion due to inadequate air or excessive gas.

3. Check the manifold gas pressure by using the

manifold pressure port on the gas valve. Refer to

Table 63, p. 181

for the required manifold pressure

during low-fire operation. If it needs adjusting,
remove the cap covering the low-fire adjustment
screw on the gas valve. Refer to

Figure 139, p. 182

for the adjustment screw location. Turn the screw
clockwise to increase the gas pressure or
counterclockwise to decrease the gas pressure.

otte

e:: Do not adjust the combustion air damper

while the furnace is operating at low-fire.

4. Check the carbon dioxide levels after each

adjustment.