Amico Automatic Cryogenic Liquid Solenoid Manifold - Manual (Page 6)

6 Amico Pipeline
Description of the Manifold
SHIPMENT DETAILS
The Manifold system may be shipped in more than one carton, depending on the number of cylinder connections. The
main carton contains the following items:
• Manifold control panel (with power supply assembly)
• Wall mounting bracket (attached to manifold control panel)
• 3/4” (19.05mm) source shut-off valve
• Installation, Operation and Service manual
Additional cartons may contain appropriate number of headers and cylinder pigtail assemblies. Cylinder inlets closest to
the manifold control panel are intended for cylinders placed directly beneath the manifold control panel. Pigtails for all
gases are 72” (1,828.8mm) flexible type. The manifold is designed to be mounted directly to a wall.
THE MANIFOLD ENCLOSURE
The manifold contains a switch mode power supply that can handle voltage from 110-240 VAC with a built-in fuse and
terminal block. The enclosure on this manifold is NEMA-1 (general purpose applications only). This cabinet must not be
mounted outdoors. For outdoor use, a NEMA- 4 enclosure is recommended.
The manifold also has a latched enclosure that is easy to remove. The pre-assembled circuit board is located on the
center of the enclosure with a hinged mounting bracket. This design will reduce installation time and eliminate the risk
of improper installation, since all the components of the manifold are connected and tested at the factory.
MANIFOLD DISPLAY BOARD
The LED’s on the front of the Manifold indicate the status of the gas supply. The primary bank will indicate (In-Use, with
the Green LED turned on) and the reserve / secondary indicating (Ready, with the Yellow LED turned on) or (Empty, Red
LED turned on) depending on the status of gas. When the primary bank of cylinders are depleted, the manifold will
automatically switch to the secondary bank of cylinders without interruption of gas flow to the facility. The Red LED
will illuminate when a bank is depleted and two normally closed dry contacts will open. One or both sets of contacts
may be wired to an external alarm, remote buzzer and/or a building management system.
When replacement cylinders are attached to the depleted bank and the reset button pressed, the red LED goes out and
the yellow LED illuminates indicating that the bank has been automatically designated as the secondary supply. No
other user interaction is required. Both sets of dry contacts close to cancel any external alarm conditions.
To prevent the loss of useful gas into the atmosphere, an economizer circuit is included to utilize the accumulated
excess pressure from the secondary supply bank. The economizer circuit re-routes the excess pressure into the line via
check valves inserted into the main inlet blocks, then passes through the 0.007” orifice which goes into the main center
section of the manifold.
ECONOMIZER CIRCUIT