Series 27000
Horizontal DETECT-A-FIRE
®
Units
Installation Instructions
12.02.D
®
INSTALLATION
Figure1: Surface Mount Units
Series 27020-1 and 27021-1
Model
Number
Contact
Operation on
Temperature Rise
Electrical Rating
(Resistive Only)
27020-0
Opens
5.0 Amps 125 VAC
27020-1
27021-0
Closes
5.0 Amps 126 VAC
0.5 Amps 125 VDC
2.0 Amps 24 VDC
1.0 Amps 48 VDC
27021-1
LOCATION
DETECT-A-FIRE detectors are precision temperature sensors.
They must be mounted in an area (normally a ceiling) so that:
1. The detector spacing complies with both system
requirements and requirements of the agency having
local jurisdiction.
2. The thermal air path to the shell is not obstructed.
Spacing per UL, FM, and UL of Canada is shown in Table 1.
Distances given are for between units on smooth ceilings.
Distances from partitions or walls are half that shown.
To assure that all spacing requirements are met, consult
the authority having local jurisdiction.
MOUNTING
DETECT-A-FIRE units are not position sensitive. Horizontal
and vertical detectors refer to the most common mounting
configurations for that unit. However, each type can be
mounted either horizontally or vertically depending on the
application and installation requirements.
*Although incandescent lamps are considered resistive, their inrush
current is 10 -15 times their steady current. Do not exceed ratings.
°
F
Setting
°
F
Tolerance
Spacings (in feet)
RTI
Color
Coding
UL
ULc
FM
140
+7/-8
50
50
20
Quick
Black
160
+7/-8
25
25
20
Quick
Black
190
+7/-8
50
50
25
Fast
White
210
+7/-8
25
50
25
Fast
White
225
+7/-8
25
50
25
Fast
White
275
+10
25
50
25
Fast
Blue
325
+10
50
50
25
Fast
Red
Table 1: Model Number 27020*, 27021
These detectors are provided with a surface mount adaptor
which may be mounted on a ceiling or to an outlet box.
However, if the adaptor is direct ceiling mounted, CIRCUIT
VOLTAGE MUST BE LIMITED TO 30 VOLTS.
The Canadian Electrical Code, Part 1, requires that these
devices be installed, mounted to an approved outlet box
and connected to Class 1 wiring. Surface mount units shall
be used only in this manner for Canadian approval.
For direct ceiling mount, proceed as follows:
1. The knockouts are located on the side of the surface
mount adaptor. Remove appropriate knockouts and
install rubber grommets.
2. Mount adaptor to solid ceiling surface through slotted holde in
adaptor mounting brackets. Supplied insulator gasket should
be placed between ceiling and adaptor. Adaptor may be
rotated to position detector.
3. Run system wiring through rubber grommets and connect
to terminals on detector per Figure 3 observing applicable
electrical codes.
4. Mount detector to adaptor with two #8-32 screws supplied.
For optional outlet box mount, proceed as follows:
1. Bend the mounting brackets on the supplied adaptor to fit
standard 4-including outlet box.
2. Mount adaptor to solid ceiling surface through slotted holes in
adaptor mounting brackets. Supplied insulator gasket should
be placed between ceiling adaptor. Adaptor may be rotated to
position detector.
Page 1 Horizontal DETECT-A-FIRE
®
Units
1-800-FENWAL-1 www.fenwalcontrols.com
* 27020 is a normally closed device and does not meet the
requirements of NFPA-72 for use as an initiating device.
Anderson-Bolds -- 216-360-9800
