HNC-310 non-addressable heat detector
Installation Instructions
www.numens.net 1 32-0029-r02_2015-05
Cautions
ELECTRICAL HAZARD: Disconnect power from equipment prior to making
any internal adjustments. Service should only be performed by qualified
personnel.
FRAGILE: Inspect the equipment prior to installation. Do not install the
equipment if damage is apparent. Do not attempt to disassemble this
equipment. If damaged, return to the supplier.
ELECTROSTATIC HAZARD: This is sensitive electronic equipment. Apply
safe ant-static practices when handling this equipment.
CIRCUIT LIMITATIONS: The maximum number of detectors connected to
a single detection zone is limited by the control and indicating equipment,
and may be limited by local regulations.
Introduction
The HNC-310 non-addressable heat detectors are suitable for
connection to 2-wire and 4-wire non-addressable fire detection
control and indicating equipment, or to addressable fire detection
control and indicating equipment that can accept non-addressable
type detectors
1
.
These instructions provide trained installation personnel with
details to install and commission HNC-310 heat detectors for
optimum performance.
Preparation
Before commencing installation, ensure all equipment (base and
detector) and tools to mount and connect the equipment are
available, such as drills, mounting screws, cables and ladders.
HNC-310 heat detectors can be installed with the following bases
and accessories.
Description Part number Datasheet
5-terminal 102 mm low profile base CN3023 31-0035
5-terminal 102 mm low profile base
a
CN3021 31-0035
9-terminal 102 mm low profile base CN3043 31-0037
9-terminal 102 mm low profile base
a
CN3041 31-0037
Detector monitor module 620-001 31-0027
Remote indicator
b
681-001 31-0034
a
UL-approved
b
Requires 9-terminal base.
Installation
Base
The base can be mounted directly onto an electrical junction box
such as an octagonal (75 mm, 90 mm or 100 mm), a round
(75 mm), or a square (100 mm) box without using any type of
mechanical adapter.
1. Feed the conductors through the middle of the base for
termination to the base contacts.
2. Mount the base on the junction box or directly onto a flat
surface.
3. Mount the base to the surface using fixing screws that are
suitable to securely fix the base to the surface.
Wiring
Base terminals accept (0.4 ~ 2.5) mm
2
conductors.
1. Strip the conductor insulation to expose 5 mm of the
conductor.
2. Connect the conductors to the base terminals.
a. See Fig. 1 for detectors using 2-wire bases.
b. See Fig. 2 for detectors using 4-wire bases.
WARNING: Take care to ensure the insulation does not get
clamped by the terminal contact.
1
May be used with the 620-001 detector monitor module.
Fig. 1: Base wiring connections
Note 1: 9-terminal base required if a remote indicator is installed.
Note 2: If a remote indicator is not installed, the polarity of the zone circuit
wiring may be reversed.
WARNING: Do not short-circuit terminals 2 and 5.
Fig. 2: 4-wire base wiring connections
3. After all the bases are installed and wired, fit the end-of-line
resistor.
Note: The value of the end-of-line resistor depends on the control and
indicating equipment to which the detectors are installed.
4. Check the wiring for continuity, short circuits and earth faults.
Detector
WARNING: Do not install the detector head until the area is
thoroughly cleaned of construction debris, dust, etc.
1. Align the detector alignment mark with the short alignment
mark in the base, as shown in Fig. 3.
2. Mate the detector head onto the base and rotate it clockwise
to secure it. The long alignment marks should be aligned.
Fig. 3: Fitting the detector to the base
Commissioning
Heat Detector
1. Ensure all the alarm signal services, releasing devices and
extinguisher systems are disabled during the commissioning
period.
2. Connect power to the detector for approximately 1 min and
check that the red alarm LED indicators flash once every 3 s.
If the LED fails to flash, it indicates the detector is not
operating. Check the wiring for the correct voltage and earth
leakage. Replace the detector if necessary.
5
L2
4
_
3
R
2
L1
1
6
OUT
4
_R
3
2
L1
1
6
OUT
5
L2
End-of-line
device
1
6
OUT
5
L2
4
3
R
_
L1
IN
2
1
6
OUT
5
L2
4
3
_
R
L1
IN
2
Optional
Power
Supervision
Relay
LED
Short Alignment Mark
Long Alignment Mark
Base
Detector head
