Tannoy CMS 3.0 Series Quick Start Manual page 10

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CMS 3.0 Series
Installation Guide for Optional Pre-Installation Backcan (PI Models Only)
An optional pre-install backcan is available for all pre-install (PI) models. The backcan is designed for pre-installation in newly constructed, non-suspended ceilings.
NOTE: The CMS 603DC/ICT and CMS 803DC models have the transformer pre-attached to the inside of the backcan; the CMS 503DC/ICT models have the transformer
pre-attached to the loudspeaker assembly.
1. Attach the backcan to a safe and secure fixing point. This can be done in a number of ways:
METHOD 1: Fix the backcan to a secure fixing point by using suitable fixings with the 4 fixing holes
provided on the PI backcan. (Fig.1)
METHOD 2: Secure the backcan to a safe and secure fixing point using suitable fixings with the flexible
straps that are attached to the PI backcan. (Fig.2)
METHOD 3:
a. Attach the PI backcan to the optional pre-mount ring (plaster ring) using the fixings provided
with the pre-mount ring. (Fig.3)
b. Next, secure the wings of the pre-mount ring to a safe and secure fixing point by using suitable
fixings. (Fig.4)
Please turn over
Installation Guide for Optional Pre-Installation Backcan (PI Models Only)
2. Attach the conduit to the installed backcan. This can be done in two ways:
METHOD 1: You can use the clamp at the back of the pre-install backcan. The product will accept a
squeeze connector with a thread size of up to 22 mm: To remove the cable clamp, simply unscrew
the threaded washer (under the wiring cover) which holds the cable clamp in place and replace it
with a conduit squeeze connector. (Fig.5)
Fig.1
METHOD 2: You can use any of the three knock-out points at the sides of the PI backcan
(19 mm, 22 mm or 28 mm diameter). (Fig.6)
Fig.2
3. If conduit is not chosen as the wiring method, run an approved speaker cable to the installed can.
Terminate in the top mounted cable clamp or with an approved cable connector in one of the three
knock-out points at the sides of the PI backcan.
Fig.3
4. Cut hole in the proper location in the ceiling using a pad saw. Place the pre-install backcan over the
hole. (Fig.7)
Fig.4
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Quick Start Guide
Conduit
Conduit
Squeeze
Connector
Fig.5
Fig.6
Fig.7