Manual: EVC-PY-IS Manual 000027 (Changes are subject to DCRN)
4
• Ref No: NISM/EVC-PY-IS/02 • 19.02.19 • Issue: 2
• Evolution • EVC-PY-IS • Conventional Intrinsically-Safe Photoelectric Smoke Detector
Section 4 - BASE MODELS
It is important to use the correct base for the
EVC-PY-IS
intrinsically-safe
smoke detector.
The UB-4-IS base is designed exclusively for use with
EVC-PY-IS
detector;
this base has 4 terminals including an auxiliary output function.
The STB-4-IS base is mechanically and electrically compatible with the EVC-
PY-IS detector and may be used as an alternative.
Section 5 - INSTALATION
In normal use, the
EVC-PY-IS
detector will be installed at ceiling level.
Pass the field wiring through the cable hole in the centre and from the rear
of the base. Offer up and affix the base to the ceiling or conduit fitting with
screws via the base mounting holes. Connect the field wiring to the base
terminals, as detailed on page 6 making sure the wiring does not obstruct
fitting of the detector head. Fit the detector head by inserting it into the
base and turning clockwise until the notch in the detector rim aligns with
base locking screw. The OMNIVIEWTM 360° indicator permits visibility
from any angle.
Fit the plastic dust cover supplied over the detector to keep out dust
etc, until the system is commissioned. If the dust cover is not fitted and
the environment is slightly dusty, such as when building work is being
completed, for example, problems of false alarms are likely to occur
after commissioning unless cleaning of the detector is undertaken. At
commissioning, the dust cover should be removed and discarded.
Note: The plastic dust cover must be removed from the detector
inorder for the detector to function correctly.
