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Application-Based Engineering Specification
Leak Detection Systems for Mechanical Equipment Rooms w/Fuel Oil
Specwriter’s Notes:
1.
This section addresses the installation of a central fluid leak alarm system with
individual pieces of equipment monitored independently, and differentiating between
water leaks and fuel oil leaks. In some cases, when a leak is detected, the
equipment will be interlocked from operating, or automatically isolated through the
use of solenoid or motorized valves upon detection of the leak.
2.
A centralized panel is recommended for operational simplicity and ease of
maintenance.
3.
For options such as H-O-A switches, Voltage Output to Solenoid Valves,
Autodialer,Battery-Backup, or RS-485 communication, please contact your local
Tracetek Representative.
1.
General
1.1. Furnish a complete water and fuel oil detection system for the areas or equipment
indicated on the contract drawings, including alarm panel, sensing probe(s) and
cables, and auxiliary equipment that detects the presence of water and fuel oil. The
sensing system shall be constructed such that only corrosion resistant parts are
exposed to the environment. The system shall include all components required for
the specific installation. The system shall sense the presence of a leak, differentiate
which fluid is detected, provide dedicated machine relays associated with the
equipment and/or fluid, sound a common audible alarm and activate common
alarm output contacts. The system shall be supervised and self-diagnostic in
design. The system shall differentiate between leak and supervisory alarm status.
1.2. The system shall be TraceTek System Model 1300MR, manufactured by Tyco
Thermal Controls, Menlo Park, CA and G. A. Fleet Associates, Inc., 55 Calvert
Street, Harrison, NY 10528.
2.
Products
2.1. The alarm panel shall include independent monitor and control groups for each
piece of equipment and/or fluid being monitored. The alarm panel shall indicate that
the fluid has contacted the sensor by activating a “Leak” LED, sounding an audible
alarm, and actuating the “Leak” output relay, all for the specific piece of equipment.
The "Leak" LED shall remain on as long as the sensor is wet. The panel shall be
field programmable for either automatic or manual reset, and provide field
adjustable time delay and sensitivity controls for each piece of monitored
equipment. The panel shall continuously monitor the sensors and interconnecting
cables for continuity. Any break in any of the 4-wire detection circuit, shall result in
a illumination of a "Cable Break" LED.
Application-Based Engineering Specification
2.2. The NEMA 1 alarm panel shall operate on 120V power. Common audible alarm and
silence button shall be provided on the panel door. A viewing window will be
provided monitoring individual control group status without opening the panel door.
For fail-safe operations, loss of power shall result in a change of state of the
common alarm relay. Each control group shall be provided with a dedicated three
pole machine style relay with integral indicator LED. These relays shall be field
replaceable plug-in type, suitable for up to 10A loads. All terminal blocks for field
wiring shall be suitable for AWG 12 wiring. Circuit board mounted control relays that
are not field replaceable and control wiring terminal blocks are not acceptable.
2.3. The water sensing probes shall ignore the presence of fuel oil. The probes shall be
low profile design, extending no more than 1.25” off the floor or wall to avoid
interference with conduit, wiring, and piping. The sensing probe shall be
constructed from non-ferrous parts. Probe contacts shall be stainless steel grade
363 or higher. The sensing probe shall have full length mounting flanges, suitable
for either mechanical fasteners or adhesive attachment. Probe body shall be high
visibility yellow epoxy-coated aluminum. Probe shall be a passive sensor,
containing only potted, electronic components. Sensing probes with internal
electromechanical components are not acceptable.
2.4. The fuel oil sensor cables shall ignore the presence of water. The preconnectorized
fuel oil sensors shall only respond to liquid and vapor phase hydrocarbon in
concentrations above 25,000 PPM. No more than 4” of wetted length is required for
an alarm regardless of sensor length.
2.5. The sensors shall be connected to the panel utilizing low voltage, plenum rated
Tracetek jumper wire. The sensors shall be supplied connectorized for ease of
installation.
2.6. Cleaning the probes, if required, shall be possible in place using a damp cloth. The
probe shall dry and reset at the module immediately upon removal from free water.
No shaking or mechanical action shall be required.
3.
Execution
3.1. All TraceTek system components shall be installed per NEC and in accordance
with manufacturer's Installation Instructions. The installer shall be responsible for
providing a clean and functional system. Supervision and training shall be available
from a TraceTek distributor or other personnel authorized by TraceTek Group.
3.2. The sensing probes shall be attached to either vertical or horizontal surfaces as
required. For adhesive attachment, utilizing construction mastic (3M type 4975).
3.3. The TraceTek system shall be commissioned by personnel authorized by the
TraceTek Group in accordance with manufacturer’s instructions upon completion of
the installation. At this time demonstration and basic operation shall be provided to
the owner.