Ravenheat CSI 85 - Manual (Page 28)

Once the process of commissioning the boiler is
complete, the commissioning engineer MUST complete
his section in the Benchmark log book.
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6.13 CHECKING THE HEATING THERMOSTAT
6.13.1 Allow the system to warm up and then turn
the C.H thermostat to ensure the main burner
modulates from “high” to “low” and “low” to “off”
and vice versa (scale range covers approx
45° C - 85° C).
6.14 TESTING AND REGULATING THE
DOMESTIC HOT WATER SYSTEM FLOW
6.14.1 Put the appliance in operation with the
(summer/winter) switch in summer position
(Fig. 35).
- Open a domestic hot water tap (preferably
the bath tap). Ensure cold water inlet
stopcock is open and the D.H.W. control
knob is set at maximum (Fig. 35 item 5).
- If the burner does not light check that the
water flow rate is above the min. required
to operate at 2.8 l/min.
The temperature of the water will depend on
the rate at which it flows. If, due to high water
pressure, the flow rate is too high (and thus
the temperature too low for practical use)
the flow rate may be adjusted. It is better to
set for the lowest acceptable temperature,
preferably at the bath tap since the user
can gain higher temperatures at other
restricted flow taps (table 1 pag. 8).
N.B.: If the cold supply is subject to large
fluctuations or is above the permitted max
water pressure, a suitable pressure/flow
regulator should be fitted in the cold water
supply to the appliance.
Fig. 37
Fig. 38
6.12 CHECKING THE FLUE SYSTEM
6.12.1 The flue system should be visually checked for
soundness check all connections and fixings
are secure and tight.
- Select summer/winter switch on summer
position (Fig. 35).
Slowly close the draw off tap to reduce the flow
rate to above the min (approx. 2.8 l/min).
- Rotate the D.H.W. control knob to ensure it
operates at its various setting (Fig. 35).
- Close the draw-off tap still further. The burner
should stop when the rate falls below about
2.8 l/min.