Product tab
Nominal Cooling Capacity
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Default: Auto Size
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Typical Range: Auto Size
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Min Max: -999,999 to 999,999
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Units: W; kW; tons; Btuh; Mbh
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This numeric field contains the nominal cooling capacity of the chiller.
Nominal Heating Capacity
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Default: 80% Clg Capacity
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Typical Range: 0 to 100
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Min Max: 0 to 100
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Units: % Clg Capacity
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This fraction represents the heating capacity as a percentage of the cooling capacity at rated conditions.
Full Load Power in Cooling
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Default: 1% Clg Capacity
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Typical Range: 0 to 100
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Min Max: 0 to 100
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Units: % Clg Capacity
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This field represents the ratio of the instantaneous electricity used divided by the cooling capacity at rated conditions. If the chiller is both heating and cooling, only the greater of the computed cooling and heating electricity is used.
Full Load Power in Heating
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Default: 0.5% Htg Capacity
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Typical Range: 0 to 100
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Min Max: 0 to 100
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Units: % Htg Capacity
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This field represents the ratio of the instantaneous electricity used divided by the nominal heating capacity. If the chiller is both heating and cooling, the greater of the cooling electricity and heating electricity is used.
Optimum Part Load Ratio
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Default: 100
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Typical Range: 0 to 100
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Min Max: 0 to 100
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Units: %
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This is the part load ratio at which the chiller performs at its maximum COP. It represents the most desirable operating point for the chiller.
Sizing Factor
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Default: 100%
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Typical Range: 0 to 100
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Min Max: 0 to 100
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Units: %
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This field allows you to specify a sizing factor for this chiller. The sizing factor is used when the chiller is autosize. The sizing factor affects the following calculations: Nominal Cooling Capacity, Design Chilled Water Flow Rate, Design Condenser Water Flow Rate and Design Hot Water Flow Rate. Sizing Factor allows to size a component to meet part of the design load while continuing to use the autosizing feature.
Design Water Temperatures
Design Entering Condenser Water Temperature
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Default: 84.2°F (29°C)
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Typical Range: 82 to 86°F (28 to 30°C)
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Min Max: -130 to 158°F (-90 to 70°C)
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Units: °F; °C
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This field represents the temperature of the water entering the chiller’s condenser when operating at design conditions. For Water Cooled Chillers, this is the temperature delivered by the cooling tower.
Design Leaving Chilled Water Temperature
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Default: 44.6°F (7°C)
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Typical Range: 43 to 45°F (6.11 to 7.22°C)
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Min Max: -130 to 158°F (-90 to 70°C)
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Units: °F; °C
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This field represents the temperature of the water leaving the evaporator of the chiller when operating at design conditions
Condenser Temperature Type
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Default: Entering Temperature
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Typical Range: N/A
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Min Max: Entering temperature, Leaving Temperature
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Units: N/A
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This field determines if the temperature dependent performance curves have on the x axis the Leaving or Entering condenser temperature. Manufacturers express the performance of their chillers using either the leaving condenser water temperature (to the tower) or the entering condenser water temperature (from the tower).
Leaving Chilled Water Temperature Low Limit
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Default: 35.6°F (2°C)
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Typical Range: 34 to 36°F (1.11 to 2.22°C)
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Min Max: -130 to 158°F (-90 to 70°C)
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Units: °F; °C
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This field is the chilled water supply temperature below which the chiller will shut off.