18. Always use oxygen compatible leak test solution on oxygen or nitrous oxide service equipment.
2. Introduction
All Harris Products Group Gas Distribution systems are cleaned, tested and prepared for the indicated gas service and are built following National Fire Protection Association (NFPA)
and Compressed Gas Association (CGA) guidelines. The 220 Series Switchover Manifold consists of a control hub (Box) and two supply bank headers or hoses, one primary and one
reserve, to provide an uninterrupted supply of gas for the specific application. The control box is designed and built with features providing automatic switchover from the depleted
primary supply bank to the reserve supply bank. Pressure gauges, optional alarm signal connections and lights show system status and alert the need to replace depleted cylinders.
Features of the automatic system include an adjustable line regulator, hoses with check valves, wall-mounted header bar assemblies and wall mounting brackets.
3. Description
The Model 220 Series Switchover Manifolds are designed to provide a continuous supply of gas. The system automatically changes from a depleted bank of cylinders in service to
the full reserve bank without an interruption of gas supply. A simple rotation of the primary bank selector knob resets the unit once the depleted bank of cylinders has been replaced.
The standard outlet regulator maintains a constant line pressure, even during the switchover process.
4. General Instructions
Manifolds should be installed in accordance with guidelines stated by the National Fire Protection Association, the Compressed Gas Association, OSHA and all applicable local codes.
The manifolds should not be placed in a location where the temperature will exceed 120°F (49°C) or fall below –20°F (-29°C) for sustained periods of time.
A manifold placed
outside in an open location should be protected against rain and excessive moisture. During winter, protect the manifold from ice and snow. The manifold should
be located in a clean, well-ventilated area which is free of oil and combustible materials.
Leave all protective covers in place until their removal is required for installation. This precaution will keep moisture and debris from the piping interior, avoiding operational problems.
All safety relief valves should be piped/vented to an outside location away from personnel. Failure to properly pipe away the external manifold relief valve can create hazardous
conditions. Flammable, oxidizing and asphyxiant gases in the general vicinity of personnel can result in extremely hazardous conditions. Any failure of internal pressure reducing valves,
seats or seals can cause excess pressure to build up and release dangerous gases into the surrounding environment.
5. Design Specifications
Maximum Inlet Pressure
220 – High Pressure: 3000 psi
220 – Acetylene: 400 psi
220 – LP Gases: 400 psi
Operating Temperature
-20 degrees F to +120 degrees F
Pressure Gauge Size
2” Dial
Inlet Connection
½” FNPT Port
Outlet Connection
½” FNPT Port
Alarm
Integral for Non-Flammable Gas Systems, Optional Remote Alarm Available For All Systems
Header
½” Nominal Pipe Size
Power Requirements
Manifold Box: 120 VAC, 1.25 Amp. For Oxy/Inert Systems Power is not required for flammable gas systems
Heaters for 220HL, 220HLHP: 120 VAC, (2) heaters @ 200W, 4A Max
Flexible Hose Length
24” or 36” unless otherwise specified
6. Standard Factory Pressure Settings
Inlet Pressure Gauge
220, 220HL, 220HP – High Pressure: 0-4000 psi
220 – Acetylene: 0-400 psi
220 – LP Gases: 0-400 psi
Outlet Pressure Gauge
220, 220HL – High Pressure: 0-200 psi, 220HP: 400 psi
220 – Acetylene: 0-30 psi
220 – LP Gases: 0-100 psi
Outlet Pressure Range
220, 220HL – High Pressure: 5-125 psi, 220HP: 200 psi
220 – Acetylene: 0-15 psi
220 – LP Gases: 0-30 psi
Switchover Pressure
220, 220HL – High Pressure: 170 psi, 220HP: 230 psi
220 – Acetylene: 65 psi
220 – LP Gases: 65 psi
Alarm Set Point
220, 220HL – High Pressure: 200 psi, 220HP: 240 psi
220 – Acetylene: 75 psi
220 – LP Gases: 75 psi
Relief Valve Set Point
220, 220HL – 250 psi
220 HP220HLHP – 500 psi
220 LPGases – 100 psi
220 Acetylene – 21 psi
THE HARRIS PRODUCTS GROUP
www.harrisproductsgroup.com
1.800.241.0804
