F
IRE
F
LEX
®
N
2
B
LAST
®
Integrated Fire Protection System
O
WNER
'
S
O
PERATION
&
M
AINTENANCE
M
ANUAL
FM-076B-0-6A
Page 17 of 25
5.2 Air Pressure Maintenance Device (Style “B”)
Used only for the sprinkler piping network of the preaction
system, when an external air supply is provided by others
(tank mounted 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
F
IRE
F
LEX
®
N
2
Blast
®
cabinets.
E16
This section replaced
by Dehydrator option B
(when used)
Contractor external Air
or Nitrogen connection
E7
E6
3
TO PNEUMATIC
ACTUATOR
(plugged when
not used)
E3
TO OPTIONAL ACCELERATOR
(plugged when not used)
E4
(plugged with SureFire trim)
FM-061H-0-119B
1
CONTRACTOR'S
HYDROSTATIC TEST PORT
(system side)
E5
TO SPRINKLER RISER
E8