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Figure 32 Weather Compensation Curves for 35°C, 45°C and 55°C Setpoints
3.12.4 DHW Cylinder Heat Up Test
A DHW cylinder heat up test must be completed for units in a system providing both heating
and DHW. The cylinder storage temperature should be set to maximum and the unit switched
to DHW ‘ON’. The unit will now start up and begin heating the DHW cylinder. The unit will
continue heating the tank until it reached the setpoint or it can no longer get rid of the heat it is
producing. If the unit shuts down before the DHW storage cylinder reaches the desired
setpoint, the heat exchanger area in the DHW cylinder is too small or the flow rate is not high
enough. The maximum temperature that the DHW storage cylinder reaches should be recorded
in the commissioning certificate and the DHW cylinder setpoint should be set to 3 degrees
below this value. The thermal disinfection program will then need to be enabled to boost the
DHW cylinder temperature above 60°C on a weekly basis.
3.12.5 Sign Off
The commissioning certificate must be signed by the commissioning engineer, with a copy sent
to Warmflow and a copy to remain with the appliance.
All product warranties will be invalidated if the appliance is not commissioned by a
Warmflow engineer or other trained and competent engineer and the combined
installation/commissioning certificate (See Section 0 of this manual) returned to
Warmflow within 30 days from the date of installation and 90 days from the date code
stamped on the appliance.
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