37
13.4.3
PROCEDURE FOR INITIAL LIGHTING
IF THE UNIT IS TO OPERATE ON LPG REFER TO SECTION 14 BEFORE PROCEEDING
1.
Ensure that the external gas-inlet appliance isolating valve, provided by the installer, is in the “off” position.
2.
Press the power rocker switch, positioned on the back of the appliance to bring the equipment on.
3.
Press the Enter/Reset button on the SMART SYSTEM control panel to initiate the burner.
4.
The combustion fan should ramp up to full speed to purge the combustion chamber and then drop back to
half rate in order to light. The spark generator should create a spark, visible through the burner sight glass.
As the gas-inlet appliance isolating valve is closed, the controls should go to a flame failure condition after
four ignition attempts (EKB45CE – EKB115CE) or one ignition attempt (EKB145CE – EKB235CE). If the
above occurs correctly, open the gas-inlet appliance isolating valve and reset the unit by depressing the
Enter/Reset button on the control panel.
5.
The combustion fan will repeat the pre-purge procedure and attempt to light. Once a flame is established,
the LCD display will change to display the rate at which it is firing.
6.
Allow the system to reach temperature to check operation of the control sensors.
7.
Once the appliance has reached temperature and shut down, check that the flame has extinguished.
13.4.4
GAS PRESSURE ADJUSTMENT AND COMBUSTION CHECKS
The Lochinvar EcoKnight™
series are supplied with a preset gas/air ratio inlet assembly. This must not be
tampered with. Any attempt to adjust the gas valve or venturi will invalidate the warranty.
Combustion figures should be as follows:
Model No.
CO
2
CO
EKB45CE
9.0%
0.5%
<100 ppm
EKB60CE
9.0%
0.5%
<100 ppm
EKB85CE
8.8%
0.5%
<100 ppm
EKB115CE
8.8%
0.5%
<100 ppm
EKB145CE
8.8%
0.5%
<100 ppm
EKB175CE
9.0%
1.0%
<100 ppm
EKB205CE
9.0%
1.0%
<100 ppm
EKB235CE
9.0%
1.0%
<100 ppm
TABLE 13.1
NATURAL GAS COMBUSTION FIGURES
If the combustion figures are not within the range specified, contact Lochinvar Limited for further guidance.
Combustion figures for Propane firing can be found in
Section 14: LPG FUEL
.
13.5
TEMPERATURE ADJUSTMENT PROCEDURE
13.5.1
CENTRAL HEATING SETPOINT
With the boiler firing, the setpoint can be adjusted using the
Up
and
Down
buttons on the SMART SYSTEM control
panel. Once the desired setpoint is displayed, the
Enter/Reset
button should be pressed to store the value.
13.5.2
DHW SETPOINT
If the stored water temperature is to be controlled by a thermostat, the setting should be adjusted on the thermostat
itself. If the stored water temperature is to be controlled by a tank sensor, the default setpoint is 65
C.
The setpoint should be adjusted to ensure that the water is stored above 60°C and distributed at 50°C within 1 (one)
minute at all outlets. Care is needed to avoid much higher temperatures because of the risk of scalding. At 50°C the
risk of scalding is small for most people, but the risk increases rapidly with higher temperatures and for longer
exposure times. The risk to young children and to those with a sensory or mobility loss will be greater. Where a
significant scalding risk has been identified, the use of thermostatic mixing valves on baths and showers should be
considered to reduce temperature, these need to be placed as close to the point of use as possible.
Should the default value need adjusting, please refer to the separate User and SMART SYSTEM Control Guide
