Amico Carbon Dioxide Instruction Manual

Installation & Maintenance Manual
Economy Manifold

User Responsibility 3
Introduction 4
Features 4
Description of the Manifold 5
Shipment Details 5
Description of Parts 5-6
Pressure Regulators (Operating & Line) 5
Pressure Relief Valves 5
Pressure Relief Valve Chart 5
Control Components 6
Warning System Components 6
Operating Alarm Systems 6
Safety Features 6
Installation 7
Receipt and Location 7
Cylinder Bank Installation Instructions 7
Operation Procedures 8
Maintenance 9
General Maintenance 9
Control Equipment 9
Cylinder Extension Bars 9
Periodic Standing Pressure Test 9
Troubleshooting 10
Cylinder Changing Procedures 11
Ordering Information 12
Parts list 12
Appendix A: Manifold Internal Layout 13
Appendix B: Manifold Dimensions 14
Appendix C: Wiring to Alarm/Buzzer 15
2Amico Corporation
Contents

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User Responsibility
WARNING: denotes steps which can prevent injury.
CAUTION: denotes steps which can prevent damage to equipment.
DANGER: denotes steps which can prevent electrical shock to equipment or prevent serious injury
and/or death.
The information contained in this Installation and Maintenance Manual pertains only to the Amico Economy Manifold.
This product will perform in conformity with the descriptions contained in this manual when assembled, operated,
maintained and serviced in accordance with the installation instructions provided.
The manifold MUST be checked periodically. Parts that are broken, missing, worn, distorted or contaminated must be
replaced immediately. Should such repair or replacement become necessary, please contact Amico Corporation or their
distributors.
All Manifolds should not be repaired or altered without prior written approval by Amico Corporation or its
distributors. Failure to comply will void all warranty on the manifold.
Statements in this manual preceded by the words WARNING, CAUTION, DANGER and NOTE are of special signicance.
Please read these sections carefully.

4Amico Corporation
Introduction
The Amico Economy Manifold incorporates the basic necessities for the distribution and monitoring of medical gases.
The manifold has been designed to provide user exibility and reliability. This manual will enable the customer to install,
use and maintain the manifold properly.
The total amount of medical gas contained in the left and right banks is displayed on the analog gauges on either side
of the manifold. These gauges are provided to show the cylinder bank pressure “In Use”and the cylinder bank pressure
“In Reserve” at all times.
When the gas cylinder pressure depletes on the “In Use” (primary) side, below the set point of the pressure switch, a
signal will go to the master alarm (or remote buzzer) informing the facility personnel that the “In Use” cylinder bank
pressure is low and the cylinders need replacement. At this point, it is necessary to silence the alarm (or buzzer) and
manually switch the lever from the depleted bank to the full bank to indicate the bank “In Use.” The next step is to
change the cylinders. Open the new cylinders to automatically reset the pressure switch and cancel the alarm condition.
NOTE: BEFORE changing the empty cylinders, move the lever over from the depleted“In Use”bank to the“Reserve”bank
to indicate the bank supplying pressure.
FEATURES INCLUDE:
• Heavy duty line regulator to produce optimum gas ow
• Pressure switch with dry contacts to indicate Reserve In Use alarm
• Check valves provided to prevent back ow from one bank to another
• Removable cabinet enclosure for easy installation and service
• Maximum inlet pressure is 3,000 psi (20,685 kPa)
• Maximum delivery pressure is 180 psi (1,242 kPa)

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SHIPMENT DETAILS
The package consists of one fully tested Economy Manifold. Optional header bar assemblies and pigtails are available.
DESCRIPTION OF PARTS
The Economy manifold is divided into two main sections:
Pressure Regulators
There are two types of regulators in the Amico Corporation manifold: the operating pressure regulator and the line
pressure regulator. Both types conform to NFPA 99.
1. Operating (bank) Regulators: There are two operating regulators on every manifold, one for the left bank and one
for the right bank. For Oxygen, Nitrous Oxide, Medical Air and Carbon Dioxide service, the“In Use”regulator will be
set at 160 psi and the “Reserve” regulator will be set at 120 psi. For Nitrogen, the “In Use” regulator will be set at 250
psi and the “Reserve” regulator will be set at 200 psi.
2. Line Regulator: There is one heavy duty line regulator on every manifold. The line regulator is capable of
maintaining a constant dynamic delivery pressure at the maximum design ow rate of the system. For Oxygen,
Nitrous Oxide, Medical Air and Carbon Dioxide service, the line regulator should be set at 55 psig (379 kPa). For
Nitrogen service, the regulator is set at 170 psig (1,172 kPa).
Pressure Relief Valves
Pressure relief valves are installed downstream of all pressure regulators and are set at no more than 50% above the
setting of the pressure regulator located immediately upstream. All pressure relief valves are capable of fully relieving
the pressure at the set point.
Pressure relief valves in the manifold have piping connections to allow for connection of vent lines to outside facilities.
Relief pressure settings vary with gas service as follows:
Oxygen Carbon Dioxide Nitrous Oxide Medical Air Nitrogen
Line Pressure Relief Valve 75 psi
(517 kPa)
75 psi
(517 kPa)
75 psi
(517 kPa)
75 psi
(517 kPa)
225 psi
(1,551 kPa)
Operating Pressure Relief Valve 350 psi
(2,413kPa)
350 psi
(2,413 kPa)
350 psi
(2,413 kPa)
350 psi
(2,413 kPa)
350 psi
(2,413 kPa)
CONTROL COMPONENTS
The Economy manifold qualies as a “Cylinder System without Reserve Supply” as classied in NFPA 99, Clause 4-3.1.5.
This is a category of the broader classication “Central Supply System” which encompasses many types of sources of
supply to nonammable medical gas piping systems.
Description of the Manifold

6Amico Corporation
WARNING SYSTEM COMPONENTS
The Economy Manifolds have the capability to be connected to external devices whose function is to give continuous
information as to the state of operation of the system (i.e. an alarm condition).
Description of the Manifold
Operating Alarm Systems
Operating alarm systems are mandatory according to CSA/Z305.1. Amico Corporation supplies a complete range of
operating alarm units which can be used in conjunction with the manifold in order to provide the required visual and
audible signal in suitable locations, when changeover from the primary supply to the secondary supply occurs and
cylinder replacement is necessary.
Mounted with the manifold is a preset pressure switch. Its function is to send a signal to the alarm unit when the
operating pressure drops below its set point. For Medical Air, Oxygen, Carbon Dioxide, and Nitrous Oxide the pressure
switch will be set at 140 psi. For Nitrogen the pressure switch will be set at 225 psi.
Safety Features
GAS SERVICE IDENTIFICATION
Amico Corporation manifolds are clearly labelled for the gas that they are intended to be used for. A nameplate,
indicating the appropriate gas, is attached on the front of the manifold cabinet. There is one pipe extending from the
top of the manifold. Two pressure relief valves within the cabinet come with pipe away adaptors that could be easily
connected to the vent out pipe.
CYLINDER CONNECTIONS
All cylinder extension bar connections, as well as pigtail hose assemblies, comply with CGA Standard B96, “Compressed
Gas Cylinder Valve Outlet and Inlet Connections.”

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RECEIPT AND LOCATION
The Amico Corporation manifold should be carefully examined upon receipt. If any damages are found, a claim should
be led with the Transport Company and Amico Corporation. Any authorized dealers and distributors should also be
notied immediately if applicable.
CYLINDER BANK INSTALLATION INSTRUCTIONS:
CAUTION: This section contains important information necessary for proper installation of the cylinder
banks. Read it carefully before installing cylinder banks.
Connect the two high pressure inlet valves/header bar assemblies to the CGA connection on each side of the cabinet.
Secure the cylinder extension bar to the support using the U-bolts supplied as part of the assemblies.
Remove the plug and chain assembly on each outlet connection on the cylinder extension bar. Attach the cylinder
pigtails to the header bar connections while ensuring the check valves are operating in the proper direction.
When the medical gas piping system has been tested in accordance with Part 4-5, Testing of NFPA 99, the Amico Economy
Manifold can then be connected to it.
The outlet pipes leading from the Amico Economy Manifold should be connected to their respective pipeline system
connections. The connection to the relief valves should be made with a union (supplied by others) to facilitate changes
if required.
As the threaded joints are installed, an appropriate sealing compound that is suitable for the gas being transmitted shall
be used.
Installation

8Amico Corporation
Operation Procedure
The following instructions must be followed for all gasses except Nitrogen:
1. Make sure the lever is set to indicate the bank “In Use”.
2. The “In Use”regulator is set to 160 psi with the “Reserve” regulator set to 120 psi.
3. When the “In Use”side depletes pressure down to approximately 120 psi, the “Reserve”bank will take over and
start to supply gas.
4. The pressure switch is set to 140 psi decreasing pressure and will alarm when the “In Use”bank is depleted.
5. To switchover, simply move the lever from the depleted bank to the opposite bank to indicate the bank “In Use”.
This resets the pressure switch.
6. Now change the cylinders in the empty bank.
7. The system is now ready for the next switchover.
8. The normal pressure setting for the line regulators is 55 psi.
FOR NITROGEN MANIFOLDS:
The“In Use”regulator is set to 250 psi and the“Reserve”at 200 psi. The pressure switch should be set to 225 psi decreasing
pressure while the normal pressure setting for the line regulators shall be 170 psi.

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GENERAL MAINTENANCE
The tests and inspections specied below apply only to the Amico Economy Manifold and not to the medical gas pipeline
system as a whole. They are intended to help ensure the proper operation of the manifold and not to be interpreted as
repair instructions. Fault nding and repair procedures are given in the Troubleshooting section of this manual.
CONTROL EQUIPMENT
Control equipment should be inspected and tested according to the following schedule:
1. PRESSURE REGULATOR
• Observe and record line pressure periodically
• Test for external leaks annually
2. PRESSURE RELIEF VALVES
• Determine the pressure at which relief occurs at least annually and compare with the requirements of clause
4-3.1.8.5. of NFPA 99.
3. HIGH PRESSURE INLET VALVE (MANIFOLD HAND VALVES)
• Inspect once annually and test for external leakage and tightness when opening and closing the valve.
CYLINDER EXTENSION BARS
The following components shall be inspected annually:
1. Test check valves of pigtail assemblies for proper closure.
2. Inspect pigtail assemblies for apparent damage and thread damage to cylinder connections, replacing all
damaged pigtails immediately.
NOTE: Replace ALL pigtails after ve years of service. The cylinders and the operating regulators of a Nitrous Oxide or a
Carbon Dioxide supply system shall be observed daily during peak demand periods to determine whether they show
frosting or condensation on the surface. Where this is evident, the system shall be further inspected for evidence of
leaks and should excessive condensation or frosting occur, the option would be to add more cylinders to increase the
volume or to upgrade to an Amico Corporation Microprocessor Automatic Manifold with a built in heater kit.
PERIODIC STANDING PRESSURE TEST
At intervals of not more than two years, a one hour standing pressure test shall be made on each medical gas system to
check for leakage.
Maintenance

10 Amico Corporation
Troubleshooting
This section is intended to serve as a general guide for identifying the potential functional problems which occur in
operation of the Economy manifold.
When an asterisk (*) appears beside the CORRECTIVE ACTION, the recommended procedure is to replace or rebuild the
unit using the repair kit.
Components removed for maintenance must be serviced, repaired and tested only by personnel qualied to work on
equipment used in medical service. Only original manufacturer’s parts, as supplied by Amico Corporation, may be used
in the maintenance of Amico Corporation manifolds.
OPERATING REGULATOR FAULTS
SYMPTOM CAUSE CORRECTIVE
Gas leakage around operating pressure
regulator body cap
Loose cap Tighten cap
Worn out diaphragm *Replace regulator with substitute unit or
use repair kit to rebuild
Venting at intermediate relief valve Over pressure due to creeping or faulty
regulation by pressure regulator
* Replace regulator with substitute unit
or use repair kit to rebuild
LINE PRESSURE REGULATOR FAULTS
SYMPTOM CAUSE CORRECTIVE
Pipeline not at desired pressure Line regulator not set correctly Set line regulator to value specied on page
5 under Line Regulator
Required gas ow not available Line regulator not set correctly Set line regulator to value specied on page
5 under Line Regulator
Low pressure relief valve venting
Line regulator set at too high a delivery
pressure
• Set line regulator to value specied on
page 5 under Line Regulator
• Check the regulator diaphragm and seat
assembly for a rip or other damages
* Rebuild or replace assembly as necessary
*Replace relief valve if it doesn’t reseal
Line regulator creep

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Cylinder Changing Procedures
1. Keep the main bank valve open throughout these procedures.
2. Close cylinder valves on all empty cylinders.
3. Disconnect pigtails from cylinder valve outlets using an appropriate wrench.
4. Place protective caps over the cylinder valves of the empty cylinders and move them aside.
5. Remove protective caps of the full cylinders. Visually inspect the cylinder valves for dust, grease and oil.
6. Using a clean (lint free) cloth, wipe each cylinder valve outlet clean. Do not use your ngers.
7. Standing to one side,“crack” the cylinder valves by briey opening and closing them to blow out any dust. Make
sure they are pointing away from you and other personnel.
8. Connect the pigtails to the cylinder valve outlets and tighten the nut with an appropriate wrench.
9. Very S-L-O-W-L-Y open the cylinder valve on the cylinder closest to the control cabinet. Watch the bank pressure
display on the front of the cabinet to make sure the pressure rises slowly to the full cylinder pressure reading.
10. Wait one full minute.
11. Proceed to S-L-O-W-L-Y open the remaining cylinder valves one at a time.
WARNING: High pressure Oxygen systems must be handled with CAUTION. Spontaneous combustion
may result if Oxygen comes in contact with grease or oil. Ensure that hands, gloves, clothing and tools
are kept clean and free of oil and grease. Be careful not to introduce dust or other contaminants into the
system when changing cylinders. Failure to comply with this procedure may be hazardous.
WARNING: Fire hazard. DO NOT permit smoking or any other source of ignition in the area where the
manifold is located or near the relief valve vent outlet. Be certain that all connections are free of dirt, grease
and oil. These substances burn with great intensity in air enriched with Oxygen or Nitrous Oxide and some
gas mixtures.

12 Amico Corporation
Ordering Information
Parts list
DESCRIPTION MODEL NUMBER
Line pressure regulator for Oxygen, Nitrous Oxide, Medical Air,
and Carbon Dioxide M2-X-MAN-42E-EC
Line pressure regulator for Nitrogen M2-X-MAN-42E-ECN
Left operating pressure regulator M3-X-MAN-18-ECL
Right operating pressure regulator M3-X-MAN-18-ECR
Line regulator repair kit M2-REG700-RK
Operating regulator repair kit M2-REG250-RK-HP
Operating check valve for all gases M-X-MAN-33B
Line pressure relief valve for all gases except Nitrogen M-X-IN-72W-075
Operating pressure relief valve for all gasses
Line pressure relief valve for Nitrogen M-X-IN-72W-225
Operating Pressure relief valve for Nitrogen M-X-IN-72W-350
Copper pigtail, comes with check valve for Oxygen, Nitrous Ox-
ide, Carbon Dioxide and Nitrogen M-X-HB-PTC-GAS (OXY, N2O, AIR, CO2 & NIT)
Stainless steel pigtail, comes with check valve for Nitrous Oxide,
Carbon Dioxide and Nitrogen M-X-HB-PTS-GAS (N2O, AIR, CO2 & NIT)
High pressure inlet header bar valve M-X-HB-HPVLV-A
Pressure switch M-PRSW-NIT
M2-HBYY-XXL-GAS
“XX”Defines the Number
of Cylinders:
04 = 2 x 2
08 = 4 x 4
“YY” Defines the Type of Header-Bar
Assembly:
TS = Straight, comes with Stainless Pigtails
TC = Straight, comes withCopper Pigtails
XS = Staggered, comes with Stainless Pigtails
XC = Staggered, comes with Copper Pigtails
Manifold Cabinet:
Header-Bar Assembly:
M3EC-S-HH-L-GAS
HH = High Pressure
EC = Economy
S = Single Heavy Duty Line Regulator
“L” Defines the
Language:
U = English (NFPA)
S = Spanish (NFPA)
The “GAS” Defines the
Type of Gas:
Oxygen = OXY
Nitrogen = NIT
Medical Air = AIR
Carbon Dioxide = CO2
Nitrous Oxide = N2O
Wall Bracket for Header-Bar Assembly: M-X-HB-WLBRKIT

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Appendix A
MANIFOLD INTERNAL LAYOUT
Pressure Switch
Left Bank Gauge
Left Bank Regulator
Right Bank Gauge
Right Bank Regulator
Line Relief Valve
Line Gauge
Line Regulator
Lower Pressure Gauge
Operating Relief Valve
Bank In Use Control Arm

14 Amico Corporation
Appendix B
MANIFOLD DIMENSIONS
Installation:
Mounting holes are 13" and 15" (33.02 cm and 38.1 cm) apart at the top and bottom of the back plate.
Use appropriate anchors (supplied by others). 3/8" (9.525 mm) diameter anchors are recommended.

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WIRING TO ALARM/BUZZER
Appendix C
Inch
[mm]
Power
Alarm
Mute
Test
Medical Gas Alarm
Alert
MEDICAL SUPPLY
STATUS
Power
Maintenance
Optional Monitoring Devices
Master Alarm
Remote Buzzer
7.75
[197]
.75
[19]

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Amico Corporation | 85 Fulton Way, Richmond Hill, ON L4B 2N4, Canada
71 East Industry Court, Deer Park, NY 11729, USA
Toll Free Tel: [phone] | Tel: [phone] | Fax: [phone]
Email: [e-mail] | www.amico.com
ACP-INSTALL-MAINT-ECONOMANI 07.24.2018
C US LISTED
C US LISTED