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Before Installation
The Twinflex IRM must be installed in compliance with the SRP installation manual. The installation must
also meet the requirements of any local authority and BS7273 Pt1 : 2006.
Positioning
The module should be mounted securely and care should be taken to ensure the device is accessible for
future maintenance.
Device Installation / Mounting
All wiring must be installed in compliance with the recommendations laid out by BS7273 Pt1 : 2006
as well as any special recommendations documented in the control panel installation manual. The
cabling used should be of a 2-core 1.5mm
2
screened, fire resistant type (e.g. MICC or FP200 equivalent),
and is to be wired in the form of a screened 2-core radial circuit (with no spurs) from the control panel,
terminating at the last (“End of Line”) device. Note that ALL connections, including inputs, should be
made via screened FP cable.
Fix the back box in a suitable position using the screw holes provided on the back, remembering to allow
enough space for the correct termination of the appropriate fire resistant cable. See technical data on
page 14 for enclosure dimensions.
This equipment is only IP30 rated so must be mounted outside the area being protected.
There are six 20mm cable entry points provided on the top and one on each side of the enclosure.
These are not knockouts and should be removed either by running a sharp knife around their outer
groove or drilling out the cable entry points.
Site safety procedures should always be observed when using a knife to remove the cable entry points.
If cable entry points are drilled out, the PCB should be removed from the enclosure before drilling
(see Figure 1).
