Product Tab
Rated Cooling Capacity
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Default: Auto sized
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Typical Range: 20 to 70 tons
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Min Max: 0 < X < 100,000,000,000,000
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Units: W, kW, Btuh, Mbh, tons
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This field specifies the rated cooling capacity of the self contained unit in cooling mode according the actual building cooling load.
Rated Full Load Energy Rate
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Default: 3.77 COP
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Typical Range: N/A
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Min Max: 0.11 < X < 2,999,999,999
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Units: COP; EER; KW/KW; KW/MBh; KW/ton; MBh/ton; therms/(ton-hr)
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This field specifies the full load energy rate of the heat pump unit for rated conditions at the highest operating speed for cooling mode. The energy rate should account for the compressor, condenser fan, and accessories, but exclude the supply air fan.
Rated Airflow Rate
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Default: Autosize
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Typical Range: 4,000 to 35,000 CFM
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Min Max: 0 < X < 100,000,000,000,000
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Units: ACH; CFM; L/s; m^3/hr; m^3/s
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This field specifies the rated airflow rate corresponding to the design cooling capacity. This design airflow rate is used to determine the airflow rates at various speed levels if they exist.
Cooling OA Minimum Temperature
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Default: -13°F, -25°C
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Typical Range: N/A
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Min Max: -100,000,000,000,000 < X < 100,000,000,000,000
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Units: °F, °C
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This field defines the minimum outdoor air dry-bulb temperature where the cooling coil compressor turns off.
Condenser Type
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Default: Air-Cooled
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Types: Air-Cooled, EvaporativelyCooled
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Min Max: N/A
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Units: N/A
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This field specifies the type of condenser applied to the self-contained unit.
Condenser Pump Rated Power
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Default: 10W
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Typical Range: N/A
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Min Max: 0 - 100,000,000,000,000
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Units: hp, kW, therms, W
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This field specifies the rated power of the evaporative condenser water pump if an Evaporatively Cooled condenser is used. This value is used to calculate the power required to pump the water used to evaporatively cool the condenser inlet air.). This field is not used when Condenser Type is Air Cooled.
Hot Gas Retreat
Enable Hot Gas Reheat
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Default: No
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Typical Range: N/A
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Min Max: N/A
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Units: N/A
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This field determines whether or not the Air to Air Heat Pump will model heat reclamation from the superheated refrigerant and gas leaving the compressor. The superheated refrigerant coil reheats the air downstream of the DX cooling coil.
Parasitic Electric Load
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Default: 0
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Typical Range: N/A
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Min Max: 0 < X < 100,000,000,000,000
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Units: hp, kW, W
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This field specifies the parasitic electric load due to control valves or other devices specific to the hot gas reheat coil operation. The load is applied whenever the coil is heating the air. Note that the electric load is small and does not contribute to the reheat.
Heat Reclaim Efficiency
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Default: 0
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Typical Range: 25 to 30%
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Min Max: 0 < X < 30
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Units: hp, kW, W
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This field defines the ratio of recovered waste heat from the superheated refrigerant gas to the total rejected waste heat from the heat pump (as if no heat reclamation occurred).
Dehumidification
Dehumidification Control Type
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Default: None
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Types: None, Cool Reheat
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Min Max: N/A
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Units: N/A
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This field determines the type of dehumidification control. The following options are valid for this field:
None - meet sensible load only, no active dehumidification control. If the system control type is SingleZoneVAV then dehumidification control must be set to None.
If the dehumidification control type is specified as CoolReheat, the DX coil will cool beyond the dry-bulb temperature set point as required to meet the high humidity setpoint. The reheat coil will then heat the supply air back to dry bulb setpoint. In order to apply a dehumidification control strategy make sure to add a relative humidity sensor in the Configure Systems system schematic.
OA Coil Leaving Min
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Default: 36°F
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Types: N/A
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Min Max:
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Units: °F, °C
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Condensate
Time for Condensate to Begin
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Default: 0 s
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Typical Range: N/A
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Min Max: 0 < X < 100,000,000,000,000
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Units: s
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This field determines the nominal time after startup for condensate to begin leaving the coil’s condensate drain line at the coil’s rated airflow and temperature conditions. The nominal time is equal to the ratio of the energy of the coil’s maximum condensate holding capacity (J) to the coil’s steady-state latent capacity (W).
Evaporation Ratio
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Default: 0
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Typical Range: N/A
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Min Max: 0 < X < 100,000,000,000,000
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Units: N/A
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This field determines the ratio of the initial moisture evaporation rate from the cooling coil (when the compressor first turns off) and the coil’s steady-state latent capacity at rated airflow and temperature conditions. A value of zero means the latent degradation model is disabled.
Basin and Crankcase Heater
Crankcase Heater Capacity
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Default: 0 Btuh
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Typical Range: N/A
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Min Max: 0 < X < 100,000,000,000,000
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Units: Btuh, kW, MBh, W
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This field determines the compressor crankcase heater capacity. The crankcase heater is enabled for any time when the outdoor air dry bulb temperature is below the Crankcase Outdoor DB Limit and the compressor is not running. To simulate a unit without a crankcase heater, enter a value of 0.
Crankcase Outdoor DB Limit
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Default: 50°F, 10°C
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Typical Range: N/A
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Min Max: 0 < X < 100,000,000,000,000
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Units: °F, °C
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This field determines the outdoor air dry-bulb temperature above which the compressor crankcase heater is disabled.