T
OTAL
P
AC
2
Page 1 of 14
T
OTAL
P
AC
2 Integrated Fire Protection System
Air Supply
FM-086G-0-43E
1- Cabinet Air Supplies
Preaction, dry valve and other sprinkler systems using air
pressure for supervisory or releasing purposes are provided
with either internal or external supervised air supplies.
Four (4) styles of air supplies are available for the
T
OTAL
P
AC
2 units depending on needs or configurations.
These air supplies are all factory assembled, mounted in the
cabinet and pressure tested. They are all located in the top
part of the cabinet, hung on mounting rails above the valve
trim. Here is the description of those options:
Air Supply Style "A": (Refer to Figure 1) Used only for
the sprinkler piping network of electrically operated preaction
systems and with dry pipe systems. Air supply style "A"
includes the air compressor mounted inside the T
OTAL
P
AC
2
cabinet with its supervisory trim and options. Compressors
are of the oiless piston type without reservoir and are factory
piped to the sprinkler piping system riser, all within the
T
OTAL
P
AC
2 cabinet. They are available in four (4) sizes;
1/6HP
1/2HP
1/3HP
1HP.
All the above air compressors have open, single phase
motors with internal thermal protection and can be ordered in
two supply voltages settings:
120Vac-60Hz or
220Vac-50Hz.
The 120Vac-60Hz is the normal voltage used in Canada and
the United-States while the 220Vac-50Hz is primarily used in
Europe, Middle-East and other countries with 220 volts, 50
cycles current.
Air Supply Style "B": (Refer to Figure 2) Used only for
the sprinkler piping network of Preaction or dry pipe systems,
when an external air supply is provided by others (either
compressor, plant air or dry nitrogen cylinders) and piped to
the air inlet port of the unit. Air supply style "B" provides an
Air Pressure Maintenance Device (APMD) trim, factory
mounted in the T
OTAL
P
AC
2 cabinet.
Note: For the releasing system piping of pneumatically
actuated systems, use air supply type "C" or "D"
below (with an external air compressor).
Air Supply Style "C": (Refer to Figure 3) Used only for
the pneumatic release piping network of pneumatically
operated Preaction or deluge systems. An external air
supply has to be provided by others (compressor, plant air or
dry nitrogen cylinders) and piped to the air inlet port of the
unit. Air supply style "C" provides an Air Pressure
Maintenance Device (APMD) trim, factory mounted in the
T
OTAL
P
AC
2 cabinet.
Air Supply Style "D": (Refer to Figure 4) Mainly used
with Preaction systems protecting refrigerated spaces and
freezers, where a special dry external air supply unit is piped
directly to the system riser inside the freezer itself, as shown
in NFPA-13. Air supply Style "D" provides only an air
supervisory and shut-off trim.
Ambient temperature at the special external air supply unit
location should not exceed 104
o
F (40
o
C). Refer to NFPA
and Factory Mutual Codes & Standards for details on
refrigerated spaces applications. Air supply style "D" can
also be used when the contractor prefers to provide his own
air supply & regulation trim, mounted outside the T
OTAL
P
AC
2
cabinet.
Note: When air supplies style "B", "C" or "D" are
selected, the air supply should be provided and
installed by the sprinkler contractor OUTSIDE of
the T
OTAL
P
AC
2 Cabinet It is NOT provided with
the unit.
1.1 Air supply design and selection:
The air supply compressor should be sized to automatically
establish the total required air pressure in 30 minutes.
External air supply should be provided with an Air
Maintenance Device (air supply style "B") to regulate and
restrict the flow of supervisory air into the sprinkler system
piping.
Note: External air supply MUST always be restricted to
insure that the automatic air supply cannot
replace air as fast as it escapes when a sprinkler
operates.
WARNING ! Pressures other than the factory pressure
settings may affect the operation of the system.
Air compressor selection Table:
H.P
CFM @
40 psi
120Vac System
capacity (gallon)
to Pump to 40
psi in 30 Minutes
220Vac System
capacity (gallon)
to Pump to 40
psi in 30 Minutes
1/6 1.33 110 90
1/3 2.61 215 170
1/2 4.06 335 270
1 7.40 610 400
Note: Selection of the proper air compressor size is the
responsibility of the installing contractor.
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