24
75
0
FG
10
C
TYPE D DOUBLE INTERL
OCK
PREA
CTION S
YS
TEM C
OMPONANTS
CL
OSED SPRINKLER
NITROGEN SUPPL
Y
EXIS
TING
AIR SUPPL
Y
OR
SEE NO
TE 1 BEL
OW
RELIABLE NITROGEN
REGULA
TING DEVICE
(TANK
EX
CL
UDED)
(OP
TIONAL)
TANK
MOUNTED C
OMPRESSOR & SWIT
CH
PFC-4410-RC
RELEASING/
CONTROL
P
ANEL
THERMAL
DETEC
TOR
MANU
AL
EMERGENC
Y
ST
ATION (ELEC
TRIC)
12
0
/
220
V
ac
NO
TE 1:
THE EXIS
TING
AIR SUPPL
Y MUS
T INC
ORPORA
TE
A
TANK.
DO NO
T USE
TANK
-LESS OR RISER-MOUNT
AIR C
OMPRESSORS
WITH
THE
TYPE D DOUBLE
INTERL
OCK
PREA
CTION S
YS
TEM
AS
THESE
ARE NO
T C
OMP
ATIBLE
WITH
THE MODEL
A
-2 PRESSURE MAINTENANCE DEVICE
MODEL
DD
X
DEL
UGE V
AL
VE
SOLENOID V
AL
VE
MODEL
B HYDRA
ULIC
EMERGENC
Y S
TA
TION
TROUBLE
& ALARM
ANUNCIA
TORS
W
ATER
SUPPL
Y
W
ATER
SUPPL
Y
CONTROL
VAL
VE
THE MODEL
DD
X DEL
UGE
VAL
VE
DOES NO
T REQUIRE
AN IN-
LINE
CHECK
V
AL
VE
FOR AIR
MAINTENANCE,
FOR REC
OMMENDED
INS
TALLA
TION L
OC
ATION FOR
A FIRE
DEP
T. C
ONNEC
TION (FDC) REFER
TO
NFP
A
13,
APPENDIX
A.8.16.1.1
W
ATER FL
OW
ALARM SWIT
CH
LOW
AIR
PRESSURE
ALARM SWIT
CH
MODEL
A
-2
PRESSURE
MAINTENANCE
DEVICE
MODEL
C MECHANIC
AL
SPRINKLER ALARM
LOC
ATION FOR
OP
TIONAL
LOW
AIR
PRESSURE SWIT
CH
SPRINKLER S
YS
TEM
Fig. 10
OR
120
V
ac