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OOHC941 Selectable Fixed Temperature
Threshold Profiles
Fixed temperature 135 °F
Fixed temperature 145 °F
Fixed temperature 155 °F
Fixed temperature 165 °F
Fixed temperature 175 °F
Fixed temperature 135 °F + Rate of Rise (RoR) 15 °F
Fixed temperature 175 °F + Rate of Rise (RoR) 15 °F
Fixed temperature 135 °F + Rate of Rise (RoR) 20 °F
Fixed temperature 175 °F + Rate of Rise (RoR) 20 °F
OOHC941 Selectable Alarm Threshold Setting
Profiles
2.50 % / ft Threshold
3.00 % / ft Threshold
See also section REPLACEMENT OF A DETECTOR IN
AN EXISTING SYSTEM
ELECTRICAL
Supply voltage: 13...32 VDC
Maximum alarm current: 750 µA
Maximum standby current: 430 µA
Refer
to
the
panel
Maintenance Manual for maximum line resistance of the
loop card.
WIRING
Detector bases for Model OOHC941 should be
connected as shown in Figure 2 and 3.
The OOHC941 supports two operation modes: polarity
insensitive mode and isolator mode. The Detector can be
wired for either mode (refer to Figure 2 and 3). During
the isolator mode, the built-in dual isolators will work at
both sides of the Detector to isolate the line short in front
or behind the module.
When the OOHC941 is wired in polarity insensitive
mode, Line -6 and -5 can be either line of the loop.
When the OOHC941 is wired for Isolator mode, the
positive line needs to be connected to 1b and the
negative line to 6. The next device needs to be
connected to 1b and 5.
The Line Isolator is located between connector 6 and 5.
NOTICE
Ensure that the panel supports Isolator mode for
the OOHC941 product version 30.
Isolator mode must not be used with a
OOHC941, product version <30. You will find the
product version number on the detector label.
OOHC941
S54320-F8-A2
30
A6V10324661_en--_m
Installation,
Operation
DETECTOR MOUNTING
The recommended orientation of the detector for wall
mounting is shown in Figure 4. To ensure proper
installation of the detector head into the base, be sure
the wires are properly dressed at installation:
·
Position all wires flat against the base.
·
Take up all slack in the outlet box
·
Route wires away from connector terminals.
Smoke detectors are not to be used with detector guards
unless the combination has been evaluated and found
suitable for that purpose. UL listed with STI Mechanical
Protection Guard Model: STI-9604 (see www.STI-
USA.com for details).
TO INSTALL DETECTOR HEAD:
Rotate detector counterclockwise while gently pressing
on it until the detector seats fully into base.
Then rotate the detector clockwise until it stops and locks
in place. Insert optional locking screw (Order Model
LK-11).
TO REMOVE DETECTOR HEAD:
·
Loosen locking screw, if installed. Then rotate the
detector counterclockwise until stop is reached.
and
·
Pull detector out of base.
3
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