Amico NFPA Triplex RVL Modular Stack Mount - Manual (Page 10)

Notes on the Source Sizing Guide
These tables represent standard systems and configurations and do not represent all configurations.
In particular:
Envelope dimensions do not include maintenance space. Amico Source recommends 36 in. (92 cm) on all sides but
less space may be possible with an understanding of the system maintenance requirements. In all cases the National
Electrical Code requires a minimum clearance of 36 in. (92 cm) in front of the control cabinet.
Contact your Local Amico Source representative should you require fitting the systems in smaller spaces.
All systems listed have the standard receivers. Larger receivers usually change the envelope dimensions.
The modular system’s envelope dimensions shown represent a typical arrangement for minimum floor space. How-
ever, modular systems are easily located wherever appropriate, which will change the dimensional requirements.
Envelope dimensions for modular systems should be used only for informational purposes.
More details on all dimensions will be found on the spec sheets for the system selected and the spec sheet should
be consulted when doing final layout.
8
Definitions
ACFM • Actual Cubic Feet per Minute is an expression of actual air volume, generally
corrected for and reference to a particular pressure.
Displacement • Theoretical physical volume of the air in the pump chamber based upon 100%
pumping efficiency, with no allowances made for heat, friction, clearances, or
other losses in the compression cycle.
Duplex System • Systems comprised of two (2) pumps, each rated for 100% Peak Calculated Load
(PCL) pipeline system.
Intermittent Duty • Reference to pumps not capable of operating continuously (i.e. Pump design
requires periodic shut-down for cooling or oil transfer).
NTP • “Normal Temperature and Pressure”, generally accepted as 70˚F (21˚C),
14.969 psi/29.92” Hg barometric pressure, and 36% relative humidity.
Simultaneous Demand • Operating reference to a condition where all pumps (Lead and Lag pumps) run
simultaneously to satisfy demand in excess of lead pump(s) capability.
Timed Alternation • Lead and lag pumps alternate on a timed basis. In medical vacuum applications,
all systems should be able to operate on a timed alternation bases to ensure
equal wear of the vacuum pumps.
Source End Vacuum • The vacuum (negative pressure) level required at the vacuum system source in
order to provide the vacuum level at terminal units (outlets) required by
the specific suction regulators utilized in the facility.
Peak Calculated Load (PCL) • The maximum estimated demand a medical facility will require of a Medical
Vacuum System.
• Calculated at SCFM at 483mmHg (20” Hg).
LPM • Abbreviation for Liters per minute; a measure of the flow rate of a gas.
SCFM • Standard Cubic Feet Per Minute is an expression of air at NTP.
Triplex Systems • Medical vacuum system with three pumps (3), each sized for 50% PCL.
Quadruplex System • Medical vacuum system with four pumps (4), each sized for 33% PCL.
Continuous Duty • Operational reference to pumps operating 24 hours a day, continuously.
Continuous Duty Rated • Vacuum systems which can operate continuously (24 hours per day) if
necessary but normally only operate on demand.
7.4 Medical Vacuum Systems Glossary
Amico Source Equipment