The temperature shown will be the actual Flow
Temperature.
Set the timer or Programmable Room Stat to be off. The
burner will go off and the fan and pump continue to run for
2 minutes. The following screen will be displayed.
Check the correct operation of all the system controls by
operating each control separately and check that the main
burner responds.
DOMEsTIC hOT WATER
Fully open a DHW tap. The boiler will continue to run and
the following screen will be displayed.
The temperature shown will be the actual DHW
temperature.
Close all taps except the largest draw off (bath) and check
that the boiler is ring in DHW. This is factory set to give
a DHW temperature rise of approximately 35°C at the ow
rate stated on page 6 under “operation”.
At full DHW output check the gas rate at the gas meter
with no other appliances in use. Refer to page 9 for gas
rates. Ensure that, with the boiler operating, the dynamic
gas pressure is able to obtain maximum output. Refer to
Table 1.
note. to achieve maximum output in DHW operation all
taps may need to be opened.
Fully open all DHW taps in turn and ensure that water
ows freely.
Reduce the DHW draw off rate to about 3 l/min (0.7gpm)
and check that the boiler modulates to deliver DHW at
approximately 64°C (with the DHW temperature control
knob set to maximum).
Close the DHW tap and check that the main burner
extinguishes. The pump will overrun for 60 seconds while
the fan overruns for 2 minutes. The following screen will
be displayed.
IMpORTANT
The gas input to the burner is regulated by the gas valve
according to the air ow produced by the fan. It is NOT
user-adjustable. Any interference to sealed settings on
the gas valve will adversely affect operation and render
warranty void. For additional information refer to “Gas
Supply” on page 8.
Note: on systems in excess of 2 bar inlet pressure, a water
pressure governor may be required to prevent water noise.
34
ChECK Ch & DhW OpERATION
INsTALLATION
To Next Page
Loading...
Need help?
General