Hog Slat Inc. Newton Grove, NC USA SEP 2025 REV A3 18 Ventilation System In the following sections for cooling, heating, mist and alarm settings the controller uses both relative and actual temperatures. In each setting the relative value will be the variable that is adjusted however the actual temperature is displayed alongside the variable to make it easier to determine the actual temperature. ================================================================== 17. COOLING: Stage 1 to 3 can provide cooling. Stage 1 is variable speed output while Stages 2 and 3 are constant speed relay output. Stage 3 can be set to Floating or Non-Floating. NON-FLOATING STAGE 3 – will follow STAGE 2. 17A: STAGE 1: Variable output stage. BW1 is the temperature range between when the stage operates at minimum speed up to full speed. MIN. VENT temperature and below is the temperature at which the fan is running at minimum speed. As the temperature goes up, the fan speed increases proportionally until temperature is equalled to “FULL SPEED” temperature at which time the stage 1 fans will be at full speed. 17B: STAGE 2: ON/OFF output. DIFF (3) equals the temperature above stage 2 when stage 3 is to come on. Stage 3 turns off when temperature falls below the OFF temperature setting. 17C. STAGE 3: ON/OFF output. Can be cooling or Heating stage (refer to Heat page section). Cooling operates according to the DIFF 3 Temperature. Stage 3 can be set for Non-Floating or Floating. Non-Floating Stage 3 will follow Stage 2. Floating, Stage 3 Differential will begin after the OFFSET 3 value. This moves the curtain operation after Stage 2. 17A 17B 17C 17D
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