Commissioning; Zone Valve - Flamco Meibes Logotherm Logo Basic 30 kW Technical Information For Installation And Operation

7. Commissioning

Commission the unit once it has been flushed and filled and a pressure test has been carried out.
All heating and sanitary installations must be complete. Bleed the system every so often during the commissioning process (bleeding devices: cf. point 6.1).
Please observe the instructions, benchmarks and settings for the control fittings specified in our service log when commissioning.
With a thermostatically controlled interface station, fluctuations in the outlet temperature can occur in the initial phase of hot water preparation (start-up
phase) before a stable hot water temperature is reached after a few seconds. This start-up behaviour is system-dependent and can be assigned to the
control characteristic of the thermostatic valve (P controller). It does not represent a defect or deficiency in your station. In order to minimise the effects, it
is therefore important to commission the station correctly and make all settings according to the design and layout parameters of the heating system.
Tips for minimising fluctuations in hot water preparation:
•
Set the differential pressure regulator and the thermostatic valves of the interface station exactly according to the design documents. Then check the
primary volume flow during hot water preparation using the heat flow meter.
• Excessively high heating medium or flow line temperatures at the interface station favour temperature fluctuations during hot water preparation. If
necessary, reduce the flow line temperature in your heating system to a necessary minimum.
• Set the hot water temperature at the thermostatic head accordingly (recommendation: 50 to max. 60 °C). The greater the difference between the set hot
water temperature and the flow line temperature of the heating system, the less favourable is the set point dynamic and thus the start-up behaviour.
•
Avoid unnecessary readjustment at the draw-off points! Run the hot water and wait until a stable draw-off temperature has been reached. Then
slowly readjust the temperature at the tap.

7.1 Zone valve

The zone valve throttles the hot water flow rate in the heating circuit to compensate for the higher pressure losses during the heating of the hot water in
the domestic water circuit and to prevent circulation noises.
Remove the protective cap (white).
• Close the valve presetting ring by rotating it to the right with a flathead
screwdriver (this position corresponds to the "zero setting").
• Take the setting for the desired heating system flow rate from the design
documents and adjust with a flathead screwdriver.
Reference value diagram for adjusting the zone valve (Kvs = 1.85):
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