Installation
Algas-SDI Operations & Maintenance Manual P/N 52632 3-9
Figure 6C – Typical Installation Drawing with Economy and Vapor Bypass
Installation (C).dxf
NOTE
The vapor bypass line is not required except when you have the
Economy Operation option. In other installations, it is
recommended because it will provide vapor from the tank to the
load in case of vaporizer failure or power failure but it is not
required. The vaporizer will operate properly without the bypass.
LIQUID LINE PIPING
The liquid line from the storage tank to the vaporizer should be Schedule 80 steel
pipe and must incur a minimal pressure drop while supplying the vaporizer at
capacity operation. Table 1 provides a handy guideline to assist in determining
the appropriate pipe size for a given size vaporizer over a given distance. Install
a liquid line strainer with a magnet for iron particle pickup upstream of the
vaporizer.
WARNING
Propane flows in both directions in the Liquid Line. This allows the
vaporizer and storage tank to maintain a “Pressure Balance”.
Never install a check valve in the liquid propane line!
CAUTION
A liquid pump must be installed if the pressure drop in the liquid
line between the vaporizer and the tank exceeds the hydrostatic
liquid head in the storage tank. ONE FOOT OF LIQUID PROPANE
EQUALS 0.21 psi ! Liquid line frosting is a sure indication of too
much pressure drop in the liquid line.
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