Trane IntelliPak SAHL Series Installation, Operation And Maintenance Manual page 160

Unit Start Up
pressure that is sensed by the modulating gas valve. The greater the combustion air pressure, the
greater the call for gas and the higher the firing rate of the heater. As the temperature setpoint is
reached, the Modulating Heat control will cause the combustion air actuator to change the damper
position to a lower firing rate that matches the heat load of the space.
1. Use
•
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
Rotating Components!
During installation, testing, servicing and troubleshooting of this product it may be necessary
to measure the speed of rotating components. Have a qualified or licensed service individual
who has been properly trained in handling exposed rotating components, perform these tasks.
Failure to follow all safety precautions could result in rotating components cutting and
slashing technician which could result in death or serious injury.
4. Once the system has started, check the appearance of the flame through the sight glass
5. Check the inlet gas pressure at the modulating gas valve. The inlet pressure should be 6" to 8"
6. Use a carbon dioxide analyzer and measure the percentage of carbon dioxide in the flue gas.
The pressure ratio and bias adjustment screws are located on top of the regulator under a sealed
plate. The actual settings can be seen through windows on each side of the regulator. Refer to the
illustration in
Note: The burner capacity is controlled by the movement of the air damper. This has been preset
7. Set the air/gas ratio to the desired value using the #1 adjustment screw until the optimum
160
Table 35, p. 108 to program the following system components for operation by scrolling
through the Human Interface displays;
Gas Heat
– Supply Fan (On)
– Variable Frequency Drive (100% Output, if applicable)
– RTM Occ/Unocc Output (Unoccupied)
– High Fire (90%)
– 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.
w.c.
Refer to the illustration in
reading is obtained. If the measured carbon dioxide level is between 8.0% and 9.5%, no
adjustment is necessary. If the CO
due to inadequate air or excessive gas.
Figure 86, p. 162.
at the factory and normally does not need field adjustment. The combustion quality (air/gas)
is controlled by the settings on the regulator (the plus (+) and minus (-) indications relate
to the change in gas flow.
values between (8.0 and 9.5%) are obtained (course setting).
WARNING
Figure 83, p. 158. Take several samples to assure that an accurate
is outside this range, it indicates incomplete combustion
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