Senztek solastat-1 User Manual - page 10
SolaStat™-1-3 User Guide
Version 1.0 – April 2011
Page 7
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The Lockout Mode is activated when the water temperature in the collector is
less than 20°C [68°F]. In this case, the collector will not contribute any useful
heat, even to cold water.
In this (Lockout) mode, the Controller will not turn on the pump even if the
correct temperature differential is reached.
However, if a frost condition is detected, this lockout mode is overridden and
the pump operates to protect the system from freezing.
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The FROST value is set by your installer. It is shown on the Programming
Table on Page9.
This function is designed to protect your collector and hot water system from
freezing and bursting.
When the FROST temperature is reached, the pump will come on just
enough to raise the temperature of water by 2 - 3°C/ 4 – 8 ºF.
Only a small amount of warm water is needed to protect the collector and
plumbing.
When the unit is in Frost Mode, the FROST and PUMP lights will come on.
CAUTION: Do not turn the power off when the Frost light is on.
As soon as the collector reaches the FROST
temperature, the FROST and PUMP lights will turn on.