Qualitrol 509ITM Series, Manual

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Forecast Override Setpoint: Enter a setpoint for the first column
of the relay matrix when the Threshold Value is exceeded for the
specified number of hours.
2. Click [Load].
Example: If the ambient temperature exceeds 30

C for at least 12 hours
over the previous 120 hours, the effective setpoint for the first column is
50

C.
Cooling Equipment Exerciser
The Cooling Equipment Exerciser actuates the relay for a set period of time at a specified
interval of days. This feature allows you to exercise a seldom-used fan circuit to prevent
rust, lubricate bearings, and to keep wildlife from nesting in fan cages.
This section of the Output Relay Setup window includes the fields described below.
Important:
Do not enable the exerciser for any relay that controls a trip function.
Enabled /
Disabled
Allows you to enable or disable this feature.
Exercise time
Allows you to set the number of minutes that the relay remains actuated
when the cycle time is reached. The range is 0 - 59 minutes.
Cycle time Allows you to set the amount of time between each exerciser actuation.
The range is 0 - 30 days.
Start time Allows you to set the time of day that the exerciser starts to run once the
cycle time is completed. The range is 0 - 23, in military time format.
Low
temperature
module # If the equipment exerciser is used to exercise cooling pumps (not fans)
an ambient input module number may be entered here to prevent
transformer damage caused by the movement of oil at cold temperatures
(electro stratification).