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2. Once the configuration for the appropriate heating system is complete, press the NEXT key
3. Press the TEST START key to start the test. Remember that the delay designated in step 2 must
4. Once the system has started, check the appearance of the flame through the sight glass
5. Check the manifold gas pressure by using the manifold pressure port on the gas valve. Refer
6. Use a carbon dioxide analyzer and measure the percentage of carbon dioxide in the flue gas.
Combustion Air Adjustment (O
7. Use an oxygen analyzer and measure the percentage of oxygen in the flue gas. Take several
8. Recheck the oxygen and carbon dioxide levels after each adjustment. After completing the high-
Low-Fire Adjustment (500 MBH, 850 & 1,000 MBH only)
1. Use the TEST initiation procedures outlined in the previous section to operate the furnace in
2. Use a carbon dioxide analyzer and measure the percentage of carbon dioxide in the flue gas.
3. Check the manifold gas pressure by using the manifold pressure port on the gas valve. Refer
Note: Do not adjust the combustion air damper while the furnace is operating at low-fire.
RT-SVX36G-EN
– Variable Frequency Drive (100% Output, if applicable)
– RTM Occ/Unocc Output (Unoccupied)
– 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.
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.
elapse before the system will begin to operate.
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.
to
Table 52
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
the adjustment screw location. Turn the screw clockwise to increase the gas pressure or
counterclockwise to decrease the gas pressure.
Refer to the illustration in
is obtained. Refer to
Table 52
exceeding the listed range indicates incomplete combustion due to inadequate air or excessive
gas.
samples to assure an accurate reading. Compare the measured oxygen level to the combustion
curve in
Figure 84, p.
159. 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
combustion air damper.
fire checkout and adjustment procedure, the low-fire setting may require adjusting.
the low-fire state (1st Stage).
Refer to the illustration in
reading is obtained. Refer to
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.
to
Figure 84
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
the adjustment screw location. Turn the screw clockwise to increase the gas pressure or
counterclockwise to decrease the gas pressure.
Figure
83. Take several samples to assure that an accurate reading
for the proper carbon dioxide levels. A carbon dioxide level
)
2
Figure 83, p.
158. Take several samples to assure that an accurate
Figure 84, p. 159
for the proper carbon dioxide levels. If the
Unit Start Up
Figure 84
Figure 87, p. 162
for the location of the
Figure 84
for
for
157
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