Page 179 - Womens Pavilion

“Oil-Less” Scroll Medical Air

1.0 General Information

Dryer Air Receiver
Each desiccant dryer is individually sized for peak The vertical air receiver is corrosion resistant,
calculated demand and capable of producing ASME Coded, National Board Certifi ed, and rated
a 10°F (-12°C) pressure dew point. Dryer purge for a minimum 150 PSIG design pressure. The tank
fl ow is minimized through a demand-based purge piping includes a liquid level gauge glass, safety
saving control system that includes a 441™ transfer relief valve, manual drain valve, and a zero loss
valve utilizing two ceramic slide plates. The inlet automatic solenoid drain valve.
to each dryer includes a mounted prefi lter with
automatic drain and element change indicator.

Control System
The mounted and wired control system is U.L.
labeled. This control system provides automatic
lead/lag sequencing with circuit breaker
disconnects for each motor with external operators.
The control panel also includes full voltage motor
starters with overload protection, redundant 24V
DC control circuit power supplies, visual and
audible reserve unit alarm with isolated contacts
for remote alarm, and touch screen display.
Automatic alternation of both compressors based
on a fi rst-on/fi rst-off principle with provisions for
simultaneous operation if required, automatic
activation of reserve unit if required, visual and
audible alarm indication for high discharge air
temperature shutdown with isolated contacts for
remote alarm are included.

Final Line Filters and Regulators
Fully duplexed fi nal line fi lters rated for 1 micron
with element change indicators, along with
duplexed fi nal line regulators, are factory mounted
and piped.

Dew Point Hygrometer/CO Transmitters
The factory mounted, piped and wired, dew point
hygrometer and CO transmitter include remote
alarm contacts. The dew point sensor is a ceramic
type with system accuracy of ± 2° F. The CO sensor
is a chemical type with system accuracy of ± 2 PPM
(at 10 PPM) for carbon monoxide. The dew point
alarm is factory set at 36° F (2° C) per NFPA 99, and
the CO alarm is factory set at 10 PPM. High CO and
high dew point conditions are indicated with visual
and audible alarms. Transmitters disconnected
from control system will activate an alarm. See
Appendix A & B for detailed information.

4107 9000 69.06 1-2