Packaged units and split system options
we can accommodate any multitude of building configurations and can adapt to any existing conditions for retrofit applications or challenges relating to layout constraints. We have a robust list of standard options as well as
customized options.
Digital scroll compressors, used as lead compressor on both refrigeration circuits. All units have two independent refrigeration circuits with dual scrolls (three different capacities) on each circuit.
Different size scroll compressors provided smoother sequencing to match the dehumidification loads. Close temperature and RH control was achieved by changing temperature set points and increasing dehumidification loads as plants grow and flower. Highest efficiency was attained by matching compressor capacity (KW) to varying load conditions.
Modulating parallel piped modulating hot gas reheat on both circuits
Only hot gas that is not needed for reheat is directed to the condenser which minimizes reduction of temperatures/pressures at low ambient below 35℉. Modulating Hot Gas Reheat (MHGR) on second circuit eliminates the need for electric reheat during high dehumidification loads during the second half of grow cycle.
Low ambient with modulating low ambient control valves
Modulating electronic low ambient control valves (LACS) were designed for both refrigeration circuits. This was critical for protecting the compressors. The LACS keep the compressors within their stable and safe operating envelope as recommended by Copeland under all conditions. Low ambient on both circuits assumes full dehumidification can be provided down to 0℉ ambient temperatures.
Simultaneous dehumidification and electric heating
The grow rooms cannot maintain temperature set points when plants are small (first four weeks) with the lights are off. Electric heat must be energized while unit in dehumidifying mode. During refrigerant purge cycles of 2-3 minutes every 2 hours…
Supply fan speed reset
Unit in constant volume until RH is above set point with compressors operating at 100% capacity. Supply Variable Frequency Drive (VFD) reduces airflow in 5% increments down to 29℉ suction low limit.