Table of Contents
XVIII.
Thermolatch and Accessories
1.
General Notes
2.
Standard Thermolatch
3.
115-24 VAC Electric Thermolatch
4.
24 VDC Electric Thermolatch
5.
24 VDC “Power On” Electric Thermolatch
6.
Combination Fire/Explosion Thermolatch
7.
ETL Thermolatch
8.
Standard Thermolatch II
9.
115 VAC Electric Thermolatch II
10. 24 VAC Electric Thermolatch II
11. 24 VDC Electric Thermolatch II
12. 24 VDC “Power On” Electric Thermolatch II
13. Double Leaf Combination Fire/Explosion Thermolatch
14. Double Leaf ETL Thermolatch
15. Thermolatch Field Modifications
16. Exposion Vent General notes
17. The McCABE Link
PROPRIETARY
Bilco information for Authorized Personnel
Only. Not to be Reproduced.
Technical
Data Sheet
Thermolatches &
Accessories
Thermolatch
The Bilco Thermolatch is a heat-sensitive device used to hold fire vent covers in
the closed and secure position and to prevent inadvertent openings of the cover(s) caused
by wind, building vibrations or various other factors. In case of fire, the ambient
temperature increases to the point that causes the fusible link to fuse, releasing the latch
mechanism and allowing the cover(s) to open to full, 90-degree, open position. A
frictionless mechanism allows for immediate release of the latch. Manual interior and
exterior pull release cables can be used to open the cover(s) without disturbing the fusible
link. The fusible link is replaced and the unit is ready to “fight another fire.”
Units equipped with a resettable electric actuator (115,24 VAC or 24 VDC) will
also release when the latch mechanism is energized (or de-energized – power-on) by
electrical signal from a smoke detector system or central fire alarm system.
Combination fire and explosion vents will open either when fusible link melts or
when cover(s) are subject to 25-30 psf (1.197-1.435 KN/m2) pressure on the underside of
the cover(s). Combination fire and explosion vents can also be electrically released using
an Electro-Thermal Link (ETL). The power requirements of the ETL are such that it can
be released with an electrical impulse from any smoke detector’s power source. It is
independent of power failure since it draws power from the stand-by power source of the
smoke detector if needed.
Note:
“Power on” Thermolatches require a continuous, uninterrupted supply of power to
keep the cover(s) closed. Any interruption of the power supply will release the covers.
This could cause a problem during a power failure if no backup power supply is
available.
Thermolatch and accesories.doc
PROPRIETARY
Bilco information for Authorized Personnel
Only. Not to be Reproduced.
1/14/02
Technical
Data Sheet
Thermolatches &
Accessories
Fusible Links
The fusible links are designed to break apart at a predetermined temperature. The
standard temperature rating is 1650F (740C). Other temperature ratings that are readily
available are 1350F (570C) and 2120F (1000C).
The fusible links are UL listed and FM approved.
The load rating for these links is 30 lb (13.6 Kg). By using a series of levers in the
Thermolatch design, the actual latch load can be reduced by a factor of 25 when it
reaches the fusible link. This will ensure that the fusible link is never overstressed and
will always release at its rated temperature.
Thermolatch material and finish
Material: Steel
Finish: Zinc-Plated with a yellow Chromate seal.
Note:
Stainless Steel is not available.
PROPRIETARY
Bilco information for Authorized Personnel
Only. Not to be Reproduced.
Thermolatch and accesories.doc
1/14/02
MODEL
TECHNICAL DATA SHEET
STD
THERMO
THERMOLATCHES AND ACCESSORIES
SINGLE LEAF UNIT
STANDARD THERMOLATCH WITH
165° FUSIBLE LINK
PROPRIETARY
Bilco information for Authorized Personnel
Only. Not to be Reproduced.
STD THERMO.doc
1/30/02
MODEL
TECHNICAL DATA SHEET
115/24 VAC
THERMO
THERMOLATCHES AND ACCESSORIES
SINGLE LEAF UNIT
115 AND 24 VAC ELECTRIC THERMOLATCH
WITH 165° FUSIBLE LINK
NOTE: “POWER-ON” DETAIL VERY SIMILAR – SEE ENGINEERING
FOR MORE INFORMATION
PROPRIETARY
Bilco information for Authorized Personnel
Only. Not to be Reproduced.
115-24VAC THERMO.doc
1/4/02
MODEL
TECHNICAL DATA SHEET
24 VDC
THERMO
THERMOLATCHES AND ACCESSORIES
SINGLE LEAF UNITS
24 VDC ELECTRIC THERMOLATCH
PROPRIETARY
Bilco information for Authorized Personnel
Only. Not to be Reproduced.
24VDC THERMO
6/13/2001
MODEL
TECHNICAL DATA SHEET
THERMOLATCHES AND ACCESSORIES
SINGLE LEAF UNIT
24 VDC
POWER ON
THERMO
24 VDC ELECTRIC THERMOLATCH
“POWER ON”
“POWER ON”
LATCH WILL RELEASE AND COVER (S) WILL OPEN UPON INTERRUPTION OF POWER
SUPPLY
PROPRIETARY
Bilco information for Authorized Personnel
Only. Not to be Reproduced.
24VDC_PO_THERMO
6/13/2001
MODEL
STD
SV/EX
THERMO
TECHNICAL DATA SHEET
THERMOLATCHES AND ACCESSORIES
SINGLE LEAF UNIT
COMBINATION FIRE AND EXPLOSION VENT WITH STANDARD
165°F FUSIBLE LINK
PROPRIETARY
Bilco information for Authorized Personnel
Only. Not to be Reproduced.
STD SVEX THERMO.doc
1/4/02
MODEL
ETL
THERMO
TECHNICAL DATA SHEET
THERMOLATCHES AND ACCESSORIES
SINGLE LEAF UNIT
COMBINATION FIRE AND EXPLOSION VENT WITH STANDARD
165°F ELECTRO THERMO LINK
PROPRIETARY
Bilco information for Authorized Personnel
Only. Not to be Reproduced.
ETL THERMO.doc
1/4/02
MODEL
TECHNICAL DATA SHEET
DETAIL OF THERMOLATCH II CURB-MOUNTED RESET
STANDARD
STD
THERMO II
STANDARD THERMOLATCH –II WITH FUSIBLE LINK
NOTE: Shown on standard curb with cap flashing. Installation on other types is the same
PROPRIETARY
Bilco information for Authorized Personnel
Only. Not to be Reproduced.
STD THERMO II
6/21/2001
MODEL
115 VAC
THERMO II
TECHNICAL DATA SHEET
DETAIL OF THERMOLATCH II CURB-MOUNTED RESET
115 VAC
Cable To Release
Mechanism
1. Thermolatch II Mechanism – Covers Will Open Only When Activated
A. Manually
B. By Heat At Fusible Link
C. Electrically By Signal
2. Each Unit Is Equipped With Electrically Operated Thermolatch 115 VAC,
60 Cycles, 0.25 AMPS.
3. Electric Thermolatch, When Energized, Releases Vent Covers To Open.
Note: Shown on standard curb with capflashing. Installation on other curb types is the same.
PROPRIETARY
Bilco information for Authorized Personnel
Only. Not to be Reproduced.
115VAC THERMO II
6/20/2001
MODEL
TECHNICAL DATA SHEET
DETAIL OF THERMOLATCH II CURB-MOUNTED RESET
24VAC
THERMO II
24 VAC
Cable To Release
Mechanism
1. Thermolatch II Mechanism – Covers Will Open Only When Activated
A. Manually
B. By Heat At Fusible Link
C. Electrically By Signal
2. Each Unit Is Equipped With Electrically Operated Thermolatch 24 VAC,
60 Cycles, 1.2 AMPS.
3. Electric Thermolatch, When Energized, Releases Vent Covers To Open.
Note: Shown on standard curb with capflashing. Installation on other curb types is the same.
PROPRIETARY
Bilco information for Authorized Personnel
Only. Not to be Reproduced.
24VAC THERMO II
6/20/2001
MODEL
24 VDC
THERMO II
TECHNICAL DATA SHEET
DETAIL OF THERMOLATCH II CURB-MOUNTED RESET
24 VDC
Cable To Release
Mechanism
1. Thermolatch II Mechanism – Covers Will Open Only When Activated
A. Manually
B. By Heat At Fusible Link
C. Electrically By Signal
2. Each Unit Is Equipped With Electrically Operated Thermolatch 24 Volt
DC, 60 Cycles, 1.8 AMPS.
3. Electric Thermolatch, When Energized, Releases Vent Covers To Open.
Note: Shown on standard curb with capflashing. Installation on other curb types is the same.
PROPRIETARY
Bilco information for Authorized Personnel
Only. Not to be Reproduced.
24VDC THERMO II
1/4/02
MODEL
TECHNICAL DATA SHEET
DETAIL OF THERMOLATCH II CURB-MOUNTED RESET
24VDC
POWER ON
THERMO II
24 VDC “POWER ON”
1. Thermolatch II Mechanism – Covers Will Open Only When Activated
A. Manually
B. By Heat At Fusible Link
C. Termination of Electrical Signal
2. Each Unit Is Equipped With Electrically Operated Thermolatch 24 VAC,
60 Cycles, 1.2 AMPS.
3. Electric Thermolatch, When De-Energized, Releases Vent Covers To
Open.
Note: Shown on standard curb with capflashing. Installation on other curb types is the same.
PROPRIETARY
Bilco information for Authorized Personnel
Only. Not to be Reproduced.
24VDC_PO_THERMO II
1/4/02
MODEL
TECHNICAL DATA SHEET
THERMOLATCHES AND ACCESSORIES
COMBINATION FIRE AND EXPLOSION
THERMO AND
ACCESSORIESCOMBO FIRE/EX
PROPRIETARY
Bilco information for Authorized Personnel
Only. Not to be Reproduced.
THERMO AND ACCESSORIES- COMBO FIRE/EX
7/25/2001
MODEL
TECHNICAL DATA SHEET
THERMOLATCHES AND ACCESSORIES
COMBINATION FIRE AND EXLOSION
WITH ELECTRO THERMO LINK
THERMO AND
ACCESSORIESCOMBO F/EX
THERMO LINK
PROPRIETARY
Bilco information for Authorized Personnel
Only. Not to be Reproduced.
THERMO AND ACCESSORIES- COMBO F/EX THERMO LINK
01/04/02
Technical
Data Sheet
Smoke Vents
Thermolatch Field Modification
Field Modification To The Electric
Operation Of A Thermolatch
The customer can modify our standard single or double leaf smoke vents for electrical
operation as follows.
Single leaf:
1. Remove standard Thermolatch mechanism. This is accomplished by
removing (3) bolts and cutting the exterior pull release cable.
2. Install the new electric Thermolatch mechanism just like the old one was
installed.
3. Run exterior pull release cable through the frame, then use cable clamps
(provided) to secure the handle to the cable.
4. Connect wires to electrical source.
Double leaf:
1. Line up electric release mechanism with the fusible link on the unit and mark
the holes on the curb.
2. Drill marked holes.
3. Bolt in place the electric release mechanism.
4. Connect wires to electrical source.
Note: See electric Thermolatch details to better picture how these procedures are
accomplished.
PROPRIETARY
Bilco information for Authorized Personnel
Only. Not to be Reproduced.
STD_THERMO_13
3/6/09
Technical
Data Sheet
Explosion Vents
General Notes
Explosion Vent
The BILCO explosion vent is designed to open by the force of the explosion
acting directly on the underside of the covers. It is the explosive force pushing on the
underside of the covers that causes the latch to release and move the covers upward,
thereby releasing the pressure to the atmosphere.
Our latching mechanism incorporates a constant force spring which causes the
latch to release when a predetermined pressure is applied through the cover as a result of
the explosion.
Prior to shipment, all BILCO vents are carefully inspected and all are tested for
proper explosion release pressure. This is performed by applying pressure directly to the
underside of each cover through the use of an air cylinder. The line air pressure required
for release of the latch is determined by calculations and each latch is factory set to
release at the required pressure.
PROPRIETARY
Bilco information for Authorized Personnel
Only. Not to be Reproduced.
EX-THERMO-NOTE
1/4/02