Lochinvar 400, 801 operation manual Set space heating operation, Natural Gas Propane

10 Start-up(continued)

Check flame and combustion (continued)

4.Place the boiler into the active position by pressing the RIGHT SELECT [ON] key (FIG. 11-1, page 67).

5.Locate the pinhole button below the RESET button on the display board (FIG. 11-1). Insert a thin wire (such as a paper clip) into the hole and press the button once and hold for 5 seconds to place the boiler into Service Mode. In Service Mode the boiler will fire at ignition speed and will then modulate up to full fire.

6.Insert the probe from a combustion analyzer into the hole left by the removal of the flue temperature sensor.

7.Once the boiler has modulated up to full fire, measure the combustion. The values should be in the range listed in Table 10A below. The CO levels should be less than 150 ppm for a properly installed unit.

If the combustion is not within the specified range, reference the Troubleshooting Section of the Knight XL Service Manual for possible causes and corrective actions.

Table 10A Flue Products Chart

Natural Gas		Propane
CO2	O2	CO2	O2
8.0% - 10%	3.0% - 6.5%	9.0% - 11%	4.1% - 6.9%

8.Once the combustion analysis is complete, test the safety shutoff device by turning the manual shutoff valve to the OFF position and ensuring that the boiler shuts down and registers an alarm. Open the manual shutoff valve, reset the control, and return to Service Mode.

9.Turn the main power off to the boiler and replace the flue temperature sensor into the flue pipe connection.

10.Place the boiler back into normal operation.

￿WARNING You must replace the flue gas temperature sensor to prevent flue gas

spillage into the room. Failure to comply could result in severe personal injury, death, or substantial property damage.

Installation & Operation Manual

Set space heating operation

Determine controlling sensor

For space heating systems, the temperature control can be based on one of three sensors; the inlet, outlet, or system supply sensor. The SMART SYSTEM control is programmed at the factory to control the temperature of the outlet sensor. The control will automatically switch to the system supply sensor once it is connected. If it is desired to base the temperature control on the inlet sensor, the appropriate parameter must be changed in the control. See the Knight XL Service Manual for a detailed explanation of this procedure.

Verify space heat circulator mode

The Space Heating Mode controls both the system (primary) pump (if connected), and the boiler (secondary) pump. When the SMART SYSTEM control receives a space heating call for heat, it turns on the system pump. If the boiler is not heating an indirect DHW (Domestic Hot Water) tank, and the set point is not met, it also turns on the boiler pump. After the space heating call for heat ends, the system pump continues to run for a short period of time. The system pump can be programmed to run continuously, except during outdoor shutdown. If the boiler pump was running, it continues to run for a short period of time as well. These pump delays are factory set to 30 seconds. If different delays are desired, the appropriate parameters in the control must be changed. See the Knight XL Service Manual for a detailed explanation of this procedure.

Adjust set point temperature

NOTICE	Please note that the brackets ([]) denote
	screen status.

The NAVIGATION dial may be used during normal operation to adjust the space heating and tank set point temperatures.

1.From the Status Screen press the NAVIGATION dial.

2.Turn the NAVIGATION dial counterclockwise to select the appropriate set point.

3.Press the NAVIGATION dial to adjust the temperature.

4.Once the desired temperature is displayed, press the RIGHT SELECT [SAVE] key.

5.If necessary repeat Steps 3 and 4 to make adjustments to additional set points.

6.Press the RIGHT SELECT [HOME[ key to upload the changes.

7.If the RIGHT SELECT [SAVE] key is not pressed, the new settings will be discarded.

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