SEQUENCES OF OPERATION CONTINUED
If the application calls for a closer setting between
maximum and minimum pressure settings on the
constant speed fan, for example 275 psig on, 240 psig
off, the effect will be to lengthen the temperature span
during which the cycling takes place, for example 50°F
to 57°F.
Optional Hot Gas Reheat
Factory installed hot gas reheat circuit includes outlet
regulator valve, check valves, hot gas solenoid operated
control valve, variable speed condenser head pressure
control, one stage sensor, and one row heat reclaim coil.
The coil is equal to the evaporator face area and
installed in the reheat position. The sensor is factory
mounted. Hot gas reheat may not be operated below
60°F. ambient temperature.
Optional Reheat Plus
To lower relative humidity (RH) in the supply air stream,
a one row subcooling coil, generally equal to the
evaporator face area may be specified. The refrigerant
liquid passes through the tube side, adding up to 40°F.
of subcooling. For every two degrees of subcooling, the
compressor capacity is increased one percent. This is
also reflected as an increase in efficiency. The resulting
heat is passed into the air stream as reheat, usually 8°F
to 10° F. at 200 cfm/ton, thus the lower discharge air
relative humidity.
Reheat Plus™ Subcooling Reheat System Protected by U.S. Patent No. 5651258
To Next Page
Loading...
