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System protection
There are two functions for excess collector temperature limitation, two for frost protection,
and a cooling function. Except for the first excess temperature limitation, all of these func
-
tions are deactivated in the factory settings.
Excess temp. limiter
Steam might build up in an idle system, making a reactivation difficult, as the pump can‘t lift
the fluid above the highest point in the system (the collector feed line). With circulation ren
-
dered unattainable, the pump experiences enormous load. This function allows the pump to
be blocked above a set collector temperature threshold until a second threshold is underrun.
If a control output is assigned to the output, the analogue level for stagnancy is output, if the
excess temp. limiter is active.
Two of these excess temp limiters are available.
Enable
Excess temp limiter active (FS1 = Yes, FS2 = NO)
Collector sensor
Collector sensor, which is to be monitored. (FS1 = S1, FS2 = S2)
Affected outputs
Outputs, which are to be blocked when exceeding the shutdown
threshold. (FS1 = A1, FS2 = A2)
Options: Combinations of all outputs (1-5).
Shutdown thresh
-
old
Temperature, above which the affected outputs are to be deacti
-
vated. (FS = 130°C)
Range:
Start threshold
to 200°C in 0.1°C steps
Start threshold
Temperature below which the outputs are to be re-enabled. (FS =
110°C)
Range: 0°C to
Shutdown threshold
in 0.1 °C steps
Summary of Contents for UVR65
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