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17.4.3
PROCEDURE FOR INITIAL LIGHTING
IF THE UNIT IS TO OPERATE ON LPG REFER TO SECTION 18.0 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.
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 (EKW46CE – EKW116CE) or two ignition attempts (EKW146CE – EKW236CE). 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.
4.
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.
5.
Allow the system to reach temperature to check operation of the control sensors.
6.
Once the appliance has reached temperature and shut down, check that the flame has extinguished.
17.4.4
GAS PRESSURE ADJUSTMENT AND COMBUSTION CHECKS
The Lochinvar EcoKnight™ series are supplied with a pre-set 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.
EKW46CE
EKW61CE
EKW86CE
EKW116CE
EKW146CE
EKW176CE
EKW206CE
EKW236CE
17.4.5
NATURAL GAS COMBUSTION FIGURES
If the combustion figures are not within the range specified, contact Lochinvar Technical Support for further guidance.
Combustion figures for Propane firing can be found in Section 18.0: LPG FUEL.
17.5
TEMPERATURE ADJUSTMENT PROCEDURE
17.5.1
DHW SETPOINT
The set point 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, this need to be placed as close to the point of use as possible.
CO
2
9.0% 0.5%
9.0% 0.5%
8.8% 0.5%
8.8% 0.5%
8.8% 0.5%
9.0% 1.0%
9.0% 1.0%
9.0% 1.0%
CO
<100 ppm
<100 ppm
<100 ppm
<100 ppm
<100 ppm
<100 ppm
<100 ppm
<100 ppm
65
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