61
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. 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 herald 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.
CO
2
CO
HCB46CE
9.0%
0.5%
<100 ppm
HCB61CE
9.0%
0.5%
<100 ppm
HCB86CE
8.8%
0.5%
<100 ppm
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
CENTRAL
HEATING
SETPOINT
With the boiler firing, the setpoint can be adjusted using the NAVIGATION dial on the SMART SYSTEM control panel.
When SETPOINT is flashing at the bottom of the display the NAVIGATION dial can be used to set and store the desired
setpoint.
17.5.2
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 52
C. a DHW sensor
is available as an ancillary, part number LL200009A.
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.
17.6
INSTALLATION NOISE
If care has been taken to follow the manufacturer’s instructions, there should be no discernible noise from the
equipment. The allied pump motor may have a level of sound that could lead to consideration for acoustic insulation,
but care must be taken not to impede ventilation or airflow to the pump motor.
Summary of Contents for HERALD HCB116CE
Page 8: ...8 3 1 2 PRINCIPLE PARTS TO BE USED IN CONJUNCTION WITH TABLE 3 1 1...
Page 31: ...31 Max distance between brackets...
Page 32: ...32...
Page 33: ...33...
Page 37: ...37...
Page 53: ...53 15 8 WIRING DIAGRAM 15 8 1 WIRING DIAGRAM...
Page 54: ...54 15 9 LADDER DIAGRAM 15 9 1 LADDER DIAGRAM...
Page 92: ...92...
