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adequate ventilation to allow escape of gas in the event of 

rupture of any of the gases.

Vertically mounted terminal units shall be mounted, when 

facing the units, in the following order, horizontally from left 

to right or vertically from top to bottom: -

O2, N2O, O2/N2O, Medical Air, Surgical Air, VAC, AGS.

When terminal units are mounted in a circular array on the 

under surface of a pendant the sequence is as for vertically 

mounted units but in a   clockwise direction when viewed 

from below.  The AGS terminal unit may occupy the centre 

of such an array.

Installation procedure

Terminal Unit. Fit. Fix to terminal unit mounting plate 

contained within the pendant/boom with 2 - M4 bolts, nuts 

and washers.

Hose Assembly. Connect. 

Connect the gas specific NIST nut of each terminal unit to its 

respective gas specific hose assembly.

Terminal unit. Commissioning. 

Carry out the commissioning procedure when all terminal 

units and hose assemblies have been fitted.

Installation of A Second Fix Assembly

General requirements.

The second fix assembly should only be fitted to the first fix 

assembly when the wall surface, pendant, trunking or hose 

boom installation is completed and clean conditions prevail. 

Installation procedure

First fix assembly. Remove blanks. Remove dust plug or 

pressure blank (if fitted) from the first fix assembly.

Valve. Assemble. 

Locate spring into brass valve plug counterbore and 

locate brass valve plug into front body. Check which thread 

matches the thread on the first fix assembly, fit the ‘O’ Ring 

to the base of this thread if not already present. Screw the 

front body into the rear body (this is a left hand thread and 

will tighten anticlockwise). 

Tighten assembly with hand pressure only.

Terminal unit label. Fit. 

Remove the backing paper from the terminal unit label. 

Locate and affix to front body with self adhesive pad.

Terminal unit. Check operation. 

Insert an AGS probe and check for correct operation.

Note...

Ensure that bezel is located with moulding marks next to the 

wall to provide a neat installation.

Concealed installation. Locate bezel. 

Locate bezel to inside lip of fascia plate.

Fascia plate. Fit. 

Locate fascia plate squarely over the installation. With 

surface installations, fascia lip fits securely inside plaster 

box. Engage both screws with first fix gas specific bracket and 

tighten.

Part No. 1827420-I3

 © 2009 BeaconMedaes.  All rights reserved. 

BeaconMedaes 

Telford Crescent

Staveley, Derbyshire S43 3PF

Tel: 

+44 (0) 1246 474 242

 • Fax: 

+44 (0) 1246 472 982

Website: www.beaconmedaes.com

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