46
14.3
LPG COMMISSIONING AND TESTING
The commissioning procedure on LPG is similar to that when the heater is firing on Natural Gas. As such, the same
procedure should be followed taking in to account the following information:
14.3.1
LPG 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
EKW45CE
10.5%
0.5%
<100 ppm
EKW60CE
10.5%
0.5%
<100 ppm
EKW85CE
10.5%
0.5%
<100 ppm
EKW115CE
10.5%
0.5%
<100 ppm
EKW145CE
10.5%
0.5%
<100 ppm
EKW175CE
10.0%
1.0%
<100 ppm
EKW205CE
10.0%
1.0%
<100 ppm
EKW235CE
10.0%
1.0%
<100 ppm
TABLE 14.2
LPG COMBUSTION FIGURES
If the combustion figures are not within the range specified, contact Lochinvar Limited for further guidance.
15.0
MAINTENANCE
15.1
GENERAL
KEEP APPLIANCE AREA CLEAR AND FREE FROM COMBUSTIBLE MATERIALS AND FLAMMABLE
VAPOURS AND LIQUIDS.
A competent person should check and ensure that the flue, its support and terminal, the ventilation to the boiler
house, safety valve, drain, pressure gauge etc. are in a serviceable and working condition and still comply with the
relevant standards and codes of practice, as detailed in
Section 4: GENERAL REQUIREMENTS
.
Servicing is recommended at intervals no greater than 12 months to ensure trouble free operation. Even if the
maintenance schedule for the storage vessel is determined to be less than annually, it is important that all controls
and safety features are checked for correct operation on an annual basis.
Measuring flue gas CO
2
and flue gas temperatures will give an indication of the state of the flue and burner. Results
of the flue gas analysis should be compared with previously measured values to identify any changes in operational
characteristics.
15.2
MAINTENANCE SCHEDULE
The water heater has a built in function that reminds the user that routine maintenance is due. As a default, this is set
to 12 months, 10,000 operational hours or 10,000 ignition cycles. Lochinvar Limited recommend that this be the
maximum service interval however, in hard water areas it may be necessary to reduce this time period to ensure
correct operation of the heater and associated equipment.
