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Controller User Manual
Figure 52
The pre-cooling system on timers.
Figure 53
The pre-cooling system minimum operating ambient temperature parameters.
Due to the orientation and low water usage of the pre-cooling system, it may take several minutes for the pre-cooling system to
become fully effective. To prevent the pre-cooling system from cycling during short periods of time, a minimum run time for the
pre-cooling system may be set. Once activated, the pre-cooling system will remain on until the minimum run time for the applicable
stage is satisfied.
To help prevent the pre-cooling system from freezing, a minimum ambient operating temperature must be satisfied for the pre-
cooling system to be active. If the ambient temperature falls below the minimum specified temperature, the pre-cooling system will
deactivate and will not become active again until the ambient temperature rises above the minimum specified temperature plus the
specified difference. For example, using the values shown in Figure 53, if the pre-cooling system is operating and the ambient
temperature falls below 40.0°F, the pre-cooling system will turn off and will not activate again until the ambient temperature reaches
45.0°F. Note that all pipework that is susceptible to freezing must be heat traced in order to avoid damage.
Enables or disables the stage minimum on timers.
The minimum amount of time that the pre-cooling stage
remains on once activated.
Yes
1200 seconds
Parameter Description Default
Table 16
The pre-cooling stage on time parameters.
Enable Stage
On Time
Stage 1-4