UNITED FIRE SYSTEMS
STANDPIPE-
PAC™ MODEL SSS-101
INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
REVISION 2.00
P/N 10-540101-001
Page 1
1. GENERAL INFORMATION
1.1. System Purpose.
The UNITED Fire Systems
STANDPIPE-
PAC™
Model SSS-101 Standpipe Supervisory
System is a fully assembled standpipe supervisory system, including compressor, switches, alarm, and control
unit providing one complete zone of standpipe supervision in compliance with Boston FD TCM3-51725. All
components are mounted on a sturdy wooden backboard, suitable for hanging at a construction or demolition site.
1.2. Boston FD TCM3-51725
Boston FD TCM3-51725 was implemented in response to serious difficulties encountered when fire standpipes at
construction and demolition sites were damaged, rendering the standpipes unsuitable for fire department use.
The directive requires that all fire standpipes in vacant buildings, buildings undergoing demolition, and required
permanent or temporary standpipes in buildings under construction be equipped with a system to pressurize the
standpipe at all times, which then would sense the pressure loss if a portion of the standpipe was damaged or
completely removed. Detailed requirements for the system are specified in the directive.
STANDPIPE-
PAC™
has been designed to aid in compliance with the requirements in Boston FD TCM3-51725. IMPORTANT:
Boston FD TCM3-51725 requires that an application to install an air pressurized alarm system be filed by a
registered design professional, and a permit obtained by a licensed sprinkler contractor. A licensed electrician
shall obtain all required electrical permits. Install
STANDPIPE-
PAC™
after application is made and accepted,
and all permits received. To review Boston FD TCM3-51725 in its entirety, go to: www.unitedfiresystems.net.
1.3. Functional Description.
See Figures 1, 2, 3, and 4.
STANDPIPE-
PAC™
consists of the following:
(1) Air compressor with automatic control switch. The air compressor compresses atmospheric air for
pressurizing the standpipe. The automatic control switch starts the compressor when the pressure is below
13 PSIG, and stops the compressor when the pressure exceeds 18 PSIG.
(2) Desiccant air dryer. The desiccant air dryer dries the compressed air before entry into the standpipe, as
required by Boston FD TCM3-51725.
(3) Low-limit pressure sensing switch. This switch senses when the pressure in the standpipe drops below 7
PSIG, as would happen if a standpipe valve was inadvertently opened, or a portion of the piping was
inadvertently removed. This switch sends its signal to the control unit (8).
(4) High-limit pressure sensing switch. This switch senses when the pressure in the standpipe exceeds 23
PSIG, as may happen if the automatic control switch on the air compressor (1) fails. This switch sends its
signal to the control unit (8).
(5) Pressure gauge. The pressure gauge indicates the approximate pressure in the system in PSIG.
(6) Check valve. The check valve prevents entry of water into the
STANDPIPE-
PAC™
when the Fire
Department pumps water into the standpipe. This device is required by Boston FD TCM3-51725
(7) Lockable shutoff valve. This valve permits maintenance on the
STANDPIPE-
PAC™
without de-pressurizing
the entire standpipe. This device is required by Boston FD TCM3-51725, and per this directive, shall be
locked in the OPEN position.
(8) Control unit with power supply, backup battery, silence switch, and automatic dialer. The control unit accepts
the signals from the pressure sensing switches (4) and (5), and operates the signal horn (9). The silence
switch allows the signal horn (9) to be silenced. The power supply is dedicated to the system as required by
Boston FD TCM3-51725, and provides for backup battery power for the control unit. This device also
provides an automatic dialer for connection of telephone lines for off-site notification.
(9) A signal horn. Additional signal horns may be connected so that signaling may be heard throughout the site.
(10) A junction box for connection of 120 VAC, 60 Hz, single phase power for both the air compressor (1) and
the control unit (8). Connection of 120VAC 60 Hz single phase in this box provides power for both the air
compressor (1) and the control unit (10).
(11) An outlet for connection of piping to the dry standpipe.
1/2” NPT pipe (provided by installer) is run from the
outlet to a connection point on the standpipe.
(12) A disconnect switch to remove power from the air compressor (1). This switch facilitates testing and
maintenance of the system.
(13) A test / service device. See instructions in this manual for use of this device.
(14) A serial number nameplate.
