Product Overview

Effective: March 2020
2 F-12-0-001
VERTICAL DETECT-A-FIRE DETECTOR SPECIFICATIONS
Vertical D-A-F 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 con-
duit, depending on local preferences and codes. To facilitate supervision of system wiring, four lead wires are provided on normally open
vertical detectors (that close on temperature rise). When mounted in a appropriately classified mounting box (i.e. Figure 7), detectors
are Underwriters Laboratory and Underwriters Laboratory of Canada listed, and FM Approved for hazardous locations.
VERTICAL MODELS
Table 1: Model Numbers 27121, 28021, 27120*, 28020*
°F
Setting
°F
Tolerance
°C
Setting
°C
Tolerance
Spacing (in feet)
RTI
Color
Coding
UL ULC FM
140 +7/-8 60 +4/-5 50 50 20 V-Fast Black
160 +7/-8 71 +4/-5 25 25 20 V-Fast Black
190 +7/-8 88 +4/-5 50 50 25 V-Fast White
210 +7/-8 99 +4/-5 25 50 25 V-Fast White
225 +7/-8 107 +4/-5 25 50 25 V-Fast White
275 ±10 135 ±6 25 50 25 V-Fast Blue
325 ±10 163 ±6 50 50 25 V-Fast Red
360 ±10 182 ±8 25 50 30 V-Fast Red
450 ±15 232 ±10 25 50 30 V-Fast Green
500 ±15 260 ±10 50 50 30 V-Fast Orange
600** ±20 316 ±12 N/A 50 30 V-Fast Orange
725** ±20 385 ±12 N/A 50 30 V-Fast Orange
Notes:
• For clean agents or CO2 suppression systems, ceiling spacing is 20ft. apart unless otherwise specified.
• For NFPA Guidelines on ceiling height compensation, see Table 7.
• *27120 and 28020 are normally closed devices and do not meet the requirements of NFPA-72 for use
as initiating devices (they are 2-wire devices).
• *27120 and 28020 are not listed by FM with RTI.
• ** Not available for Normally Closed detectors
Table 2: Vertical D-A-F Specification
Model Number Head Material Contact Operation
Electrical Rating
(Resistive Only)
27120-0 Brass
Normally Closed
(Open on Rise)
5.0 Amps 125 VAC
0.5 Amps 125 VDC
27120-22 Stainless Steel
27121-0 Brass
Normally Open
(Close on Rise)
5.0 Amps 125 VAC
0.5 Amps 125 VDC
2.0 Amps 24 VDC
1.0 Amps 48 VDC
27121-20 Stainless Steel
28020-3 Stainless Steel
Normally Closed
(Open on Rise)
5.0 Amps 125 VAC
0.5 Amps 125 VDC
28021-5
Stainless Steel
Normally Open
(Close on Rise)
5.0 Amps 125 VAC
0.5 Amps 125 VDC
2.0 Amps 24 VDC
1.0 Amps 48 VDC
12-200001-00X*
Approximate weight: 5 oz. All shell material is Stainless Steel. All Stainless Steel is Type 300.
* Specialty product with limited availability.
Figure 4. Hexagonal Head
Figure 5. Coupling Head