Amico NFPA Triplex SCD Modular Stack Mount User Manual
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5.
Determine a routing for the intake piping and note it on the building drawings. Piping downstream of the
compressor shall be routed in a manner such that it is not subjected to temperatures lower than 40
o
F (4
o
C).
6.
Ensure the intended location for the air plant is adequately ventilated or is at minimum air conditioned. The
plant will emancipate a considerable amount of heat into the surroundings. Hence, it must be factored
in when selecting a compressor site; determining the adequacy of ventilation; or identifying BTU
requirements for air conditioning. (BTU data is furnished in the equipment data sheet).
7. Determine the availability of electrical service.
8. If the medical air system is not already piped to the proposed location, determine the routing for
the piping and note it on the building drawings.
6.3.2 Design
1. Follow directions for laying out piped medical gases. This will supply a count of outlets which is
necessary for the next steps.
6.3.3 Plant Sizing
There are several available methods for sizing Medical Air. For the purpose of this design guide, only the National Fire
Protection Association (NFPA) Method will be discussed.
The NFPA Plant Sizing Method
1.
Count all outlets within the infrastructure that will utilize the air compressor system (See Figure 2).
In situations in which the exact type of room cannot be located within the table, please select the
one which most closely approximates the room as indicated in the chart.
2.
Once the total amount of outlets are entered, the next step entails multiplying all variables across the table
(left
—>right) to apply the simultaneous usage factor.
3.
Obtain an estimate of air requirement by summing the columns (top v
bottom).
4.
NFPA recommends the inclusion of additional capacity for potential ventilator use. However, this ventilator
factor causes significant problems and is usually the cause behind gross over-sizing for medical air
plants. Therefore, extreme caution should be taken.
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