Honeywell SILENT KNIGHT FFT-STSS Technical manual

Document 54420:B 10/25/2021 ECN: 151062
FFT-STSS/FFT-STSR
Single Telephone Station
Product Installation Document
1 Description
The Single Telephone Station is compatible with the Silent Knight Firefighter’s Telephone IDP-FFT and SK-FFT series. The FFT-STS Series has a
handset with a push-to-talk switch used for communication with the main FFT controller or other remote handsets. The FFT-STSR is for recessed
installations while the The FFT-STSS is for surface-mount installations. For more information, refer to the IDP-FFT Installation Manual PN 54708 or
the SK-FFT Installation Manual PN 54711.
2 Installation
Figure 1 and Figure 2 illustrate the telephone chassis and backbox.
8-3/8 in (212.85 mm)
1-1/8 in (28.57 mm)
1-1/16 in (26.97 mm)
3-3/8 in
(85.73 mm) 2-5/16 in
(58.75 mm)
11-1/2 in
(292.10 mm)
1-1/4 in
(31.75 mm)
1-1/16 in
(27.05 mm)
6-1/4 in (158.75 mm)
1-9/16 in
(39.67 mm)
11-7/8 in
(301.65 mm)
2 in
(50.80 mm)
15 in
(381 mm)
11 in
(279.4 mm)
13/16 in (20.24 mm)
Figure 2 Backbox
Figure 1 Telephone Chassis

FFT-STSR/FFT-STSS Installation Document — P/N 54420:B 10/25/2021 2
Figure 3 and Figure 4 show the Break Glass Kit and the FFT-STS door with keylock.
3 System Wiring
The maximum riser wiring resistance is 50 ohms, 10,000 ft. (3048 m) maximum wiring distance at 14AWG. System wiring for telephones with coiled
cord handsets must not be connected to the outside wiring or run in the same conduit or cable tray as the power or cable TV lines.
4 Assembly of Units with Coiled Cord Handsets
The following assembly steps are used for telephones with coiled cord handsets. These steps must be accomplished once the enclosure has been
mounted and the system wiring is in place.
1. Attach the system wiring to the terminal block on the telephone chassis assembly.
2. Insert the 6-32” nut in the backbox. Do not tighten.
3. Install the telephone chassis assembly in backbox.
4. Insert the trim ring on the backbox with the 6-32” wing nuts. Do not tighten.
5. Install door assembly. Tighten wing nuts.
Figure 4 FFT-STS Door with Keylock
tempered glass
hammer
Figure 3 Break Glass Kit
ADDRESS
LOOP
ONES
TENS
PHONE
+ –
to SLC
audio-
audio+
to FFT audio
or
FFT-FPJ audio
or
FFT-STS audio
Figure 5 FFT-STS Telephone Connection
SK-MINIMON
SK-STS
Contact EOL set
to Connected