Medical Gas Alarm Panel Requirements for Hospital Projects

Which standard governs the alarm panels?

ISO 7396-1 sets requirements for pipeline systems for compressed medical gases and vacuum, including monitoring and alarms. HTM 02-01 is the UK framework for design, installation, validation and operation, and NFPA 99 is the US standard with defined master, area and local alarms. Hospitals in the UAE commonly reference one or more of these, depending on the consultant and the authority.

Always confirm the edition and the specific clauses listed in the project specification. This article is a general guide; where it differs from your specification, the specification and the authority's current requirements prevail.

Locations of master and area alarms

Master alarms, which report source and main line conditions, are located where responsible staff can see them. A common requirement is to have master information visible in more than one place, for example the engineers' office and a location staffed around the clock, such as a switchboard or security control room.

Area alarms are placed at the nurses' station or other point staffed continuously within the area served, such as an ICU or operating suite. The medical gas area alarm panel should be visible and audible from where clinicians work, and zones should match the area valve arrangement.

Signals, labelling and what the panel shows

What do medical gas alarm panels show? Typically a status indication for each monitored gas, an indication for normal condition, an indication for abnormal pressure (high or low), an audible alarm with a mute function and a visual signal that remains until the cause is cleared. Some panels also show the pressure value, flow and consumption.

Labelling should name each gas clearly, use the colour and identification required by the project standard, and identify the area served. Labels should be durable and legible in the lighting of the room. Avoid ambiguity: staff must read the label and know at once which supply is affected.

• Clear gas identification for each channel
• Normal, low-pressure and high-pressure indication
• Audible alarm with mute and persistent visual signal
• Area served shown on the panel
• Fault indication for the alarm circuit itself

Wiring, power and testing

Wiring requirements usually call for sensors to be connected so that a cable fault is detected, a supply that is protected against local power failure, and signals that remain independent of other building systems. Where alarms feed a BMS, the dedicated alarm should still work if the BMS fails. Check the standard for the specific rules on supervised circuits and emergency power.

Alarms must be tested at commissioning, after any change to the pipeline, and periodically in service. Record each test. A MZU II touchscreen unit displays pressure and flow for 1 to 12 gases, gives light and acoustic alarms and sets monitored parameters from the touchscreen on site, so the settings should be documented and protected.

Specifying panels in your project

In the specification, list the gases, the number of panels, their locations, whether flow and consumption are required, interfaces to a display, an AVSU or a BMS, and the test and documentation package. See our guides to medical gas alarm systems and HTM 02-01 for background.

Beckfinity supplies MZ Liberec alarm units in the UAE. Contact our specialists to review a specification.