VC1000 Focus Guide - ProLon

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VAV Controller www.prolon.net Output 3 is set as a radiant floor output. Its heating setpoint is 30%, with a proportional band of 60%. The minimum slab temperature is set to 21°C, and the maximum slab temperature is set to 27°C. At a given moment, the demand of the zone is 45%. The Calculated Output Level is therefore (45-30) / 60 = 25%. Therefore, the Slab Temperature Setpoint will be 25% of the way between the min and max slab limits: (27-21) x 0.25 + 21 = 22.5°C. • Max Slab Temp Units MIN MAX Default °C 5 30 27 °F 41 86 80.6 • Min Slab Temp: Units MIN MAX Default °C 5 30 21 °F 41 86 69.8 2.1.6.2 Unoccupied Mode • Min Slab Temp: When in unoccupied mode, the scale defined above is ignored, and the controller maintains this temperature in the slab. Units MIN MAX Default °C 5 30 19 °F 41 86 66.2 2.1.6.3 PI Loop The controller heats the radiant floor using pulse width modulation. The percentage of the cycle that the output is activated is determined by a proportional / integral (PI) loop. The output pulses at 50% of the cycle length (defined below) when the slab temperature reaches the setpoint. The proportional band will increase or reduce the length of the pulse depending on the offset from the setpoint. The integral increases the action of the output over time (the longer the slab temperature is incorrect, the more effect the integral component will have). 22 www.prolon.net info@prolon.net
VAV Controller www.prolon.net • Proportional: Units MIN MAX Default °C 0 10 1 °F 0 18 1.8 • Integral: Defined as the amount of time required to cause the pulse width to vary by 100% to compensate for a continual error of 1 °C. Units MIN MAX Default min 0 600 60 2.1.6.4 Setup • Cycle Length: The amount of time of a total ON AND OFF cycle. Units MIN MAX Default min 5 250 15 • Outside Cutoff Temp: Above this temperature, the radiant floor output always remains deactivated. (There is a 2°C differential to allow for temperature fluctuations). Units MIN MAX Default °C 5 30 15 °F 41 86 59 • Slab Temperature Calibration: This applies an offset to the slab temperature reading, if required. Units MIN MAX Default °C -15 15 0 °F -27 27 0 23 www.prolon.net info@prolon.net
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Page 3 and 4: VAV Controller www.prolon.net Table
Page 5 and 6: VAV Controller www.prolon.net 1.2 I
Page 7 and 8: VAV Controller www.prolon.net • F
Page 9 and 10: VAV Controller www.prolon.net Figur
Page 11 and 12: VAV Controller www.prolon.net 2.1.2
Page 13 and 14: VAV Controller www.prolon.net • C
Page 19 and 20: VAV Controller www.prolon.net • M
Page 21: VAV Controller www.prolon.net 2.1.6
Page 25 and 26: VAV Controller www.prolon.net • M
Page 29 and 30: VAV Controller www.prolon.net • C
Page 33 and 34: VAV Controller www.prolon.net 2.2 N
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VC1000 Focus Guide - ProLon

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