thermital 20105840, Руководство по установке и обслуживанию

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56
ENGLISH
TECHNICAL ASSISTANCE SERVICE
Solar heating system
inefficient.
Air in circuit.
Flow rate too low or too high.
Pressure is low.
Bleed the circuit.
Check that the flow rate is about
30l/h per m
2
.
Check that the cold pressure
of the system is approximately
3 bar.
Reduced supply of domestic
hot water.
Supply pressure is too high.
Lime scale and/or sludge in
storage cylinder.
Flow rate too high.
Fit a pressure reducer.
Check and clean.
Fit a flow reducer.
Check functioning of DHW
circuit pump.
Check positioning of sensors.
Check boiler operating
temperature.
Check temperature setting of
thermostatic mixer valve.
Reduce the speed of the solar
circuit pump first. Then turn the
flow rate adjustment screw on the
valve group to set a flow rate of
30l/h per m
2
of collector area.
SOLUTION
FAULT
CAUSE
∆T between the collector and
the storage cylinder is not too
high or too low.
Set a ∆T of 8-10°C.