Installation & Operation Manual
53
10
Start-up
(continued)
Check flame and combustion
(continued)
4.
Place the boiler into the active position by pressing the
ENTER/RESET button on the display board (FIG. 11-1,
page 61) until
BLR:Standby
appears in the display
window.
5. Locate the pinhole button in the upper right corner of the
“T” in the Knight logo 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 Wall
Mount Service Manual for possible causes and corrective
actions.
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 Wall Mount 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, 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. 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 Wall Mount Service
Manual for a detailed explanation of this procedure.
Set space heating set point temperature
The UP and DOWN keys may be used during normal operation
to adjust the space heating set point temperature. Once the
desired temperature is displayed, press the ENTER/RESET key
to save the new setting. If the ENTER/RESET key is not pressed,
the new setting will be used for the current heating cycle only.
The old setting will become active after the current heating cycle
ends.
Table 10A
Flue Products Chart
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.
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.
WARNING
Natural Gas
Propane
CO
2
O
2
CO
2
O
2
8.0% - 10%
3.0% - 6.5%
9.0% - 11%
4.1% - 6.9%
