Page 113 - Med Plaza and Cancer Center

"Oil-Less” Medical Air Medical Systems

1.0 General Information (continued)

1.1 Modular Basemount Standard Components

Noise Attenuating Enclosure (optional)
A two piece, molded fiberglass noise attenuating enclosure is available. Noise levels of a single compressor
module do not exceed 78 dB(A) when measured in accordance with Cagi-Pneurop. Enclosure panels are
capable of being removed during operation without exposing rotating v-belts.

Dryer/Control Module
The dryer/control module includes a NEMA 12, U.L. Labeled control system, duplexed desiccant drying
system, duplexed final line filters, duplexed final line regulators, and dew point/CO monitor. All of the above
are factory piped and wired in accordance with NFPA 99 and include valving to allow complete air receiver
bypass, as well as air sampling port.

Dryer
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Each desiccant dryer is individually sized for peak calculated demand and capable of producing a 10 F (-12 C)
pressure dew point. Dryer purge flow is minimized through a demand-based purge saving control system. The
inlet to each dryer includes a mounted prefilter with automatic drain and element change indicator.

Control System
The multiplex, factory mounted and wired, control system is NEMA 12 and U. L. labeled. This control system
provides automatic lead/lag sequencing with circuit breaker disconnects for each compressor. Duplex systems
have two external operators; triplex and larger systems have one external operator. The control panel also
includes full voltage motor starters with overload protection, redundant 120V control circuit transformers,
visual and audible reserve unit alarm with isolated contacts for remote alarm, hand-off-auto lighted selector
switches, automatic alternation of all compressors with provisions for simultaneous operation if required,
automatic activation of reserve unit if required, visual alarm indication for high discharge air temperature
shutdown with isolated contacts for remote alarm, and runtime hourmeters.

Final Line Filters and Regulators
Fully duplexed final line filters rated for 0.01 micron with element change indicators, along with duplexed
final line regulators, are factory mounted and piped.

Dew Point Hygrometer/CO Monitor
The factory mounted, piped and wired, dew point hygrometer and CO monitor 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. Both set points are field adjustable. High
CO and high dew point conditions are indicated with visual and audible alarms.

Air Receiver Module
The vertical air receiver is ASME coded, National Board certified, rated for a minimum 150 PSIG design
pressure, and includes a liquid level gauge glass as well as a timed automatic solenoid drain valve.

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