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DUAL Page 21 of 28
Integrated Fire Protection System
OWNER'S OPERATION & MAINTENANCE MANUAL
FM-0860-0-31F
Figure 5.4 – Air supply Style "B"
(APMD without air compressor)
Note
: The external air supply must be restricted to insure that it cannot replace air as fast as it escapes when a releasing
device or sprinkler operates. When the system is put in service, open the input valve (E6) first
Air option components:
E3 System air pressure gauge
E4 Air supervisory pressure switch
E5 Air pressure maintenance device (APMD)
E6 APMD input valve
E7 APMD output valve
E8 APMD bypass valve
FM-061H-0-119B
1
CONTRACTOR'S
HYDROSTATIC TEST PORT
(system side)
E5
TO SPRINKLER RISER
E8
E3
TO OPTIONAL ACCELERATOR
(plugged when not used)
E4
(plugged with SureFire trim)
This section replaced
by Dehydrator option
(when used)
Contractor external Air
or Nitrogen connection
E7
E6
3
TO PNEUMATIC
ACTUATOR
(plugged when
not used)
E16
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