DETECT-A-FIRE®
Detection and Release Devices
Detection and Release Devices
Fenwal® and DETECT-A-FIRE® are registered trademarks of Kidde-Fenwal Incorporated, Ashland, Massachusetts, USA
DETECT-A-FIRE®
Detection and Release Devices
FEATURES
Repeatable - resets itself, nothing to replace, testable
Rugged - withstands shock and vibration
Versatile - available various temperature settings
Durable - long lasting stainless steel shell
Economical - wide spacing reduce installation costs
Factory set internal contact area is hermetically
sealed in stainless steel
APPLICATIONS
Protection of schools, factories, offices, libraries, etc.
Power generation
Gas station
Paint spray booths
Range hoods
GENERAL DESCRIPTION
DETECT-A-FIRE units are the “heart”of many Fire Protection
Systems. These highly reliable devices have been a standard
of the industry for over 45 years. Many thousands of these
units are now in use controlling the release of extinguishants
such as clean agents, CO2, water, or dry chemicals. In some
systems the device is used as an ALARM device, to sense overheat or fire, and alert personnel. In other systems, it is used
as a RELEASE device, to sense fire and actuate fire attack
systems. DETECT-A-FIRE units have met with wide acceptance
because they are designed with RATE COMPENSATION. This
provides a unique advantage over both fixed temperature and
rate-of-rise types of detectors because only the DETECT-A-FIRE
unit accurately senses the surrounding air temperature regardless of the fire growth rate. At precisely the predetermined
danger point, the system is activated. Fixed temperature detectors must be completely heated to alarm temperature and
therefore a disastrous lag in time may occur with a fast rate
fire. Rate-of-rise devices, on the other hand, are triggered by
the rate of increase in ambient temperature and are subject to
false alarms caused by harmless, transient thermal gradients
such as the rush of warm air from process ovens. The secret of
the unit’s sensitivlty is in the design (figure 1). The outer shell
is made of a rapidly expanding alloy which closely follows
changes in surrounding air temperature. The inner struts are
made of a lower expanding alloy. Designed to resist thermal
energy absorption and sealed inside the shell, the struts fol-
low temperature changes more slowly. A slow rate fire (fIgure 2)
will heat the shell and struts together. At the “set point”, the unit
will trigger, actuating the alarm or releasing the extinguishant. A
transient rush of warm air up to 40F°/min. may expand the shell,
but not enough to trigger the unit. By ignoring transient warm air
excursions, the DETECT-A-FIRE unit virtually eliminates false alarms
prevalent with rate - of - rise devices. If a last rate fire (figure 3)
starts, the shell will expand rapidly. The struts will close, actuating
the alarm or releasing the agent. The faster the fire rate of growth,
the sooner the DETECT-A-FIRE unit will react.
This chart shows three categories of fire detection devices
and their relative response levels for reaction to three different
rate - of - rise conditions. Statistics indicate that 97% of all fires fall
within these categories.
RATE - OF - RISE
Type of
Under
Between
Over
device
10°F/min.
10÷40°F/min
40°F/min
Rate
Second
Compensated
FIRST
FIRST
but at selected
DETECT-A-FIRE
protection level
Unit
Fixed
SECOND
SECOND
THIRD
Temperature
Rate-of-Rise
Will not operate
Will not operate
FIRST
unless fixed
unless fixed
but may be a
temperature
temperature
false alarm
supplement
supplement
at 165°F is
at 165°F is
provided, then it
provided, then it
is THIRD in
is THIRD in
sequence
sequence
DETECT-A-FIRE® Detection and Release Devices by Terry Ferraris & C. Milano - Italy
SPECIFICATION
HORIZONTAL DETECT-A-FIRE UNITS
HORIZONTAL DETECT-A-FIRE UNITS
Horizontal detectors are designed for locations where appearance is a factor. The attractive, functional design lends physical
protection of the unit while making it suitable for commerciaI,
industriaI, mercantile and public buildings, institutions and ships
in non-hazardous locations (those classified as “ordinary” under
the National Electric Code). Flush mounted units are designed to
fit standard 4” octagonal electrical boxes and surface mounting
units are designed to mount directly on ceilings or on 4” electrical junction boxes. Canadian Electrical Code requires mounting
only to an electrical junction box.
VERTICAL DETECT-A-FIRE UNITS
Vertical detectors are designed for use in both “ordinary” or
“hazardous” locations. For “ordinary” use, they may be mounted to any approved junction box with 7/8” diameter opening
by using 1/2- 14 NPT mounting nuts. The device may be wired
in or out of conduit, depending on local preference and codes.
Four leadwires are provided on normally open vertical units (that
close on temperature rise), per UL requirement, to facilitate supervision of system wiring. Instruments are Underwriters Laboratory and Underwriters Laboratory of Canada listed and Factory
MutuaI approved for hazardous locations, when mounted in a
suitable fitting.
Dimensions in inch
Contract
Operation on
Temp. Rise
Approx.
weight
per unit
Electrical
Rating
(resistive only)
12-X27020-000
Opens
284g
5.0 Amps 125 VAC
listed fitting in accordance
12-X27020-001
(325°F Max )
0.5 Amps 125 VDC
12 - X28020-003
with National Eletric Code
12 - X28021-005
and/or local authority
12-X27021-000
Closes
5.0 Amps 125 VAC
Class I, groups, B ,C
12 - X27120-000
having jurisdiction
12-X27021-001
(325°F Max)
and D; Class II
12 - X27121-000
Hazardous
Location
Detector type
Fitting required
for UL & ULC
Listings and FM approval
Class I, groups A, B
12 - X27120-022
Mount detector to a suitable
C and D; Class II
12 - X27121-020
Groups E, F, and G
Model no.
284g
0.5 Amps 125 VDC
2.0 Amps 24 VDC
1.0 Amps 48 VDC
Groups E, F, and G
CONSTRUCTION
NOTE A: Spacings shown are distances between units on smooth
ceiIings: the distances from partitions or walls would be half that
shown. Authority having local jurisdiction should be consulted before
installation.
Stainless steel shell sensing element. Cold rolled steel
mounting facility. Off-White finish.
NOTE B: Temperature preset at factory only. Special settings avaiIable
upon request. Consult factory or Fenwal Representative for additional
information.
HORIZONTAL DETECT-A-FIRE MODELS
TEMPERATURE RATING
Suggested setting a minimum of 100°F above ambient.
Model number 27020*, 27021
°F
°F
Setting
Tolerance
UL
ULc
FM
RTI
Coding
140
+ 7/- 8
50
50
20
Quick
Black
160
+ 7/- 8
25
25
20
Quick
Black
NOTE D: Up to 375°F - #18 AWG Teflon insulated wire used on units.
Above 375°F - #16AWG TGGT insulated wire used on units.
190
+ 7/- 8
50
50
25
Fast
White
210
+ 7/- 8
50
50
25
Fast
White
225
+ 7/- 8
25
50
25
Fast
White
Specifications subject to change without notice.
- UL or Canada labelling avaiIable upon request.
- AIthough incandescent Iamps are considered resistive, their inrush
current is 10 - 15 times their steady current. Do not exceed ratings.
275
± 10
25
50
25
Fast
Blue
325
± 10
50
50
25
Fast
Red
NOTE C: In appIications where corrosion is suspect, care should be
taken to protect the DETECT-A-FIRE unit to realize optimum performance and maximum life. Consult factory for suggestions.
Spacings (in feet)
Color
* 27120 is a normally-closed device and does not meet the
requirements of NFPA-72 for use as an initiating device.
DETECT-A-FIRE® Detection and Release Devices by Terry Ferraris & C. Milano - Italy
VERTICAL DETECT-A-FIRE UNITS
Model Number 27120*, 27121
°F
°F
Setting Tolerance
140
+7/-8
160
+7/-8
190
+7/-8
210
+7/-8
225
+7/-8
275
±10
325
±10
360
±10
450
±15
500
±15
600
±20
725
±20
(Hexagonal head)
Spacings (in feet)
UL
ULc
FM
50
50
25
25
25
25
50
50
25
25
50
30
25
50
30
25
50
30
50
50
30
25
50
30
25
50
30
50
50
30
N/A
50
30
N/A
50
30
RTI
Fast
Fast
Fast
V-Fast
V-Fast
V-Fast
V-Fast
V-Fast
V-Fast
V-Fast
V-Fast
V-Fast
Color
Coding
Black
Black
White
White
White
Blue
Red
Red
Green
Orange
Orange
Orange
* 27120 is a normally-closed device and does not meet the
requirements of NFPA-72 for use as an initiating device.
Dimensions in inch
Model Number 28020, 28021
(Coupling head)
°F
°F
Setting Tolerance
140
+7/- 8
160
+7/- 8
190
+7/- 8
210
+7/- 8
225
+7/- 8
275
±10
325
±10
360
±10
450
±15
500
±15
600
±20
725
±20
Mounting Head
Material
Brass
Type 300 Stainless Steel
Brass
Type 300 Stainless Steel
12X28020-003
Type 300 Stainless Steel
12-X28021-005
Type 300 Stainless Steel
FM
30
30
30
30
30
30
30
30
30
30
30
30
RTI
V-Fast
V-Fast
V-Fast
V-Fast
V-Fast
V-Fast
V-Fast
V-Fast
V-Fast
V-Fast
V-Fast
V-Fast
Color
Coding
Black
Black
White
White
White
Blue
Red
Red
Green
Orange
Orange
Orange
Note: For clean agents and C02 suppression systems, ceiling spacing 20ft.
apart unless otherwise specified. * 28020 is a normally closed device and
does not meet the requirements of NFPA-72 for use as an initiating device
Dimensions in inch
Model
Number
12-X27120-000
12X27120-022
12-X27121-000
12-X27121-020
Spacings (in feet)
UL
ULc
50
50
25
25
50
50
25
50
25
50
25
50
50
50
25
50
25
50
50
50
N/A
50
N/A
50
Shell
Material
Type 300
Stainless
Steel
Contact
Operation on
Temperature Rise
Opens
(450°F Max)
Closes
Opens
(450°F Max)
Closes
Electrical
Rating
(Resistive Only)
5,0 Amps 125 VAC
0,5 Amps 125 VDC
5,0 Amps 125 VAC
0,5 Amps 125 VDC
2,0 Amps 24 VDC
1,0 Amps 48 VDC
5,0 Amps 125 VAC
0,5 Amps 125 VDC
5,0 Amps 125 VAC
0,5 Amps 125 VDC
2,0 Amps 24 VDC
1,0 Amps 48 VDC
Approx.
Weight
per unit
142g
142g
142g
142g
MODIFICATIONS 12-992012-XXX, Fluorocarbon coating, available on 27120-022, 27121-020,28020-003,28021-005 models only (500°F max.).
DETECT-A-FIRE® Detection and Release Devices by Terry Ferraris & C. Milano - Italy
DETECT-A-FIRE in Ex-flameproof housing
Specification
Fire Detector Temperature Switches. Model:
- 27100 Rate Compensated
- 28000 Rate compensated
Constructive Characteristics
Ex d housing: aluminum ASTM B-179-82
Electrical connection: 3/4” NPT-F
Operation: OPENS/CLOSES on temperature rise
Construction
Weatherproof: With degree of protection IP66 according to IEC 60529
Flameproof:
According to valid standards harmonized with ATEX Directive,
with certificate ICEPI11ATEX03C001 or to IECEx scheme
for type of protection Ex d IIC T6/T5/T4/T3*,
with certificate IECEx CES12.0015
With approval UL certificate QBCRr7.E10518 &
CSA certificate 4418-02 013046-0-000 according to
NEC standard Cl, I Div, 1 & 2 Groups A,B, C, D Cl, II
Div, 1 Groups E, F, G
EX
classification
II 2 GD
II 2 GD
II 2 GD
II 2 GD
II 2 G
Ambient
Class
temperature
temperature
-20°C to 65°C
T6
-20°C to 95°C
T5
-20°C to 120°C
T4
-20°C to 130°C
T3
-20°C to 185°C
T3
-40°C upon request
Cable
temperature
70°C
100°C
125°C
135°C
190°C
For the two available cable inlets, the manufacturer shall supply:
- 1 temporary plastic plug
- 1 plug according to selected certification
Materials accepted for plug:
Brass, Carbon steel and SS316
Certification
Housing Material
IECEx/ATEX
ALUMINUM
ATEX
SS316
ATEX
CAST IRON
CSA/UL
ALUMINUM
Agency listings
DETECT-A-FIRE units are UL , ULc and FM listed.
ATEX and IECEx approved as fire detection thermostats
(close on temperature rise) and as releasing devices
(open on temperature rise).
Agency
File Number
Location
UL
S492
Ordinary
UL
E19310
Hazardous
ULc
CS341- E
Ordinary and Hazardous
FM
J.I. 0V3H0.AE
Hazardous
FM
17302
Ordinary
UL
S2410
Ordinary (600&725°F)
UL
E89599
Hazardous (600&725°F)
ICEPI
11ATEX 03C001 Hazardous
IECEx
CES12.0015
Ancillary equipments
- Flameproof housing with window and LED for power detection
- Flameproof housing with window and LED to detect which DAF
is switched on
- External test push button
- Test kit to check the DAF setting without disassembling it from its
installation
DETECT-A-FIRE® Detection and Release Devices by Terry Ferraris & C. Milano - Italy
Hazardous
UL & CSA
EX - Flameproof housing
DAF Series: 27120 - xxx, 28120 - xxx
Contacts open on temperature rise
DAF Series: 27121 - xxx, 28121- xxx
Contacts close on temperature rise
Rating contacts:
2A @ 24Vac/dc Resistive load
1A @ 48Vac/dc Resistive load
0,5A @ 115Vac/dc Resistive load
5A @ 125Vac/dc Resistive load
DETECT-A-FIRE® Detection and Release Devices by Terry Ferraris & C. Milano - Italy
Atex & IECEx
EX - Flameproof housing
DAF Series: 27120 - xxx, 28020 - xxx
Contacts open on temperature rise
Rating contacts:
2A
@ 24Vac/dc Resistive load
DAF Series: 27121 - xxx, 28021 - xxx
Contacts close on temperature rise
1A
@ 48Vac/dc Resistive load
0,5A @ 115Vac/dc Resistive load
DETECT-A-FIRE® Detection and Release Devices by Terry Ferraris & C. Milano - Italy
Configuration list
DETECT-A-FIRE 27000 & 28000 Series
2 7 0
1
1
2 8 0
0
0
0
2
2
0
2
2
0
0
1
0
0
1
Hexagonal Head
Opens on temperature rise .........................................................
Closes on temperature rise .........................................................
Coupling Head
Opens on temperature rise ........................................................
Closes on temperature rise .........................................................
Head material
0 0 Brass ..............................................................................
2 0 S.S. (only for type 27121) .................................................
2 2 S.S. (only for type 27120) .................................................
0 5 S.S. (only for type 28021) .................................................
0 3 S.S. (only for type 28020) ................................................
Setting
A 140°F ..............................................................................
B 160°F ..............................................................................
C 190°F .............................................................................
D 210°F ..............................................................................
E 225°F ..............................................................................
F 275°F .............................................................................
G 325°F .............................................................................
H 360°F ..............................................................................
I 450°F ............................................................................
J 500°F (only for types 27121, 28021) ...............................
K 600°F (only for types 27121, 28021) ...............................
L 725°F (only for types 27121, 28021) ...............................
Housing
0 Only Detect-A-Fire .......................................................
A IECEx/Atex certified for 3/4 NPT-F.(Aluminum).............
I IP65 3/4” NPT-F (Aluminum)*........................................
P IP65 1” GK (Aluminum)*................................................
C UL/CSA certified (Aluminum)........................................
S S.S 316 Atex certified....................................................
Accessories
0 No Plug .....................................................................
1 Plug 3/4” brass .........................................................
2 Plug 3/4” carbon steel ..............................................
3 Plug 3/4” s.s. 316 IECEx ..........................................
4 Plug 1” brass ............................................................
5 Plug 1” carbon steel .................................................
6 Plug 1” s.s. 316 IECEx .............................................
Finishing
0 Only Detect-a-Fire ................................................
1 Original colour cast iron ........................................
2 One-colour painting (outside) cast iron ................
3 Two-colour painting (inside/outside) cast iron .....
4 Stainless steel original colour ...............................
5 Original color aluminum
6 One-colour painting (outside) aluminum ...............
7 Two-colour painting (inside/outside) aluminum ...
Terminals
0 Only Detect-A-Fire ............................................
1 2 terminals ........................................................
2 5 terminals (only for types 27121, 28021) ........
3 Back Plate Threaded 6MA Holes 5-Terminal ....
4 Back Plate Threaded 6MA Holes 2-Terminal ....
*Cast iron and S.S.316
available on request
6/2012
Other products
LINEAR HEAT DETECTION
DETECT-A-FIRE® Detection and Release Devices by Terry Ferraris & C. Milano - Italy
www.terryferraris.it - info@terryferraris.it - Phone +39 025391005