STI 1229HTR240 - Manual (Page 2)

2
Installation Notes
1. The enclosure is rated to protect signaling appliances indoors and
outdoors and in areas of direct weather exposure.
2. When covering fire-signaling appliances with the enclosure, some light
loss occurs. Please follow the guidelines listed during installation.
3. Strobe light loss values for respective manufacturers are shown on page
3. To determine the new composite candela value of the use with the
guard refer to the sample calculation shown on page 3 for a
manufacturer’s strobe.
4. Record the manufacturer’s candela value as “A” and the light loss value
as “B” and the assembly value as “C”. Example: A 60 candela strobe with
a 30% light loss transmission value. Value “A” is now 60. Value “B” is
(60 times 30% or 0.30) in this case 18.
5. Now value “C” is value “A” minus value “B” or 60-18 = 42 candela light
source. Now refer to NFPA tables for proper room size that newly
established value “C” will work in. Then submittal installation drawings
must show the composite candela value in this example 42.
6. On a multiple candela value strobe such as 15/30/75 a calculation must
be done for each value and the drawing notation composite value for
each number on the strobe.
7. All field wiring within this enclosure must be rated for a minimum
operating range of 0ºC - 110ºC.
Warnings
The enclosure is used to protect UL Listed 1638 and 1971 visual notification
appliances at temperatures down to -70˚F (-57˚C). It is the installer’s
responsibility to comply with NEC 70 Articles 502 and 503, NFPA 72, and other
applicable fire and electrical codes. Conduit or raceway paths need to be
sealed as near to the enclosure as possible. Installer should have maintained
supervision over the low temperature thermostat. The low temperature
monitoring thermostat makes the circuit at +32°F (0°C) and clears the circuit
at +50°F (+10°C). This listing requires that the fire alarm supervisory control
module be only of the latching type. On the appliance mounting plate is a
label where you should record the installation date. Also include below the
serial number and installation date on the instruction sheet for quick
reference.
Serial Number ____________________________________
Installation Date __________________________________
!