Raypak RayTemp Hot Water Energy Management Control - Manual (Page 21)

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RETURN TEMPERATURE
The return sensor is used to compensate for seasonal changes in loop heat loss. The strategy may
raise the supply/branch temperature in cold weather to ensure that the last rooms on the loop
have hot enough water even during low demand periods.
R0 SELECT - Return Sensor Installed Select YES if this sensor is connected, otherwise select
NO. Default is YES.
R1 SELECT - Minimum Return Temperature If the return temperature drops below this
value then the return sensor strategy will be activated. Above this value, the strategy will have no
effect on desired temperature. Default Temp 108°F.
R2 SELECT - Return Sensor Response This is a multiplier which increases the desired tem-
perature as the return temperature drops. Example: desired = 130, return = 100, R1 (above) = 102,
R2 = 5. The desired temperature will be increased to 140 = 130 + (102-100) X 5. Default Value
is 1.