AEC FSS Series 1.5- 10 HP Fountain Solution Systems - Manual (Page 41)

Page 40 FSS Series Fountain Solution Systems
IAE-600
4-7 Fan Cycling Switch
FSS Series Air-Cooled Models Only
FSS-A-5 and FSS-A-7.5 Models
These models have one fan. The fan cycling switch turns on the
fan when the discharge pressure in the condenser reaches 300 psi
(1,896.1 kPa/18.9 bars) and turns it off when the pressure drops
below 190 psi (1,379.0 kPa/13.8 bars).
FSS-A10 to FSS-A30 Models
These models have two fans. One fan runs continuously every time
the compressor operates. The second fan cycles based on the
parameters listed in the above section.
The fan cycling switch turns on the second fan when the condenser
pressure reaches 275 psi (1,896.1 kPa/18.9 bars) and turns it off
when the pressure drops below 200 psi (1,379.0 kPa/13.8 bars).
4-8 Pressure Switch
The pressure switch cut-out device, mounted in the process piping,
shuts down the chiller if it senses that the water pressure through
the evaporator has dropped below an acceptable level. The
pressure switch opens the control circuit, and shuts off the
chiller.
4-9 Flow Switch
The flow switch cut-out device, mounted in the process piping,
shuts down the chiller if it senses that the water flow rate through
the evaporator has dropped below an acceptable level. The flow
switch opens the control circuit shutting down the pump(s),
and the chiller shuts off.
4-10 Air Pressure Switch
The pressure switch cutout device, mounted in the air supply shuts
down the unit if it senses that the customer supplied air pressure
has dropped below the acceptable level. The pressure switch
opens the control circuit, shuts down the pump(s), and shuts
off the chiller.