PREACTION SYSTEM, DOUBLE INTERLOCK
ELECTRIC/PNEUMATIC RELEASE
MODEL F470 - 4 and 6 INCH (100 and 150 mm)
m /f
-7 fxjp
- 2 FEET
II
(600mm)
MINIMUM
. .
cr”
0
I- Model F470 External Resetting
Multimatic Deluge Valve
2- Model F52O/F5201 Swing Check
Valve
3- System Main Control Valve
(supervised in open position)
4- System Shut-Off Valve
(supervised in open position)
5 Solenoid Valve
6- Dry Pilot Actuator
7- Low Air Pressure Alam, Switch
8- Waterflow Pressure Alam Switch
Q- Manual Control Station
lo- Automatic Air/Nitrogen Pressure
Maintenance Device
13- Manual Pull Station (as required)
14- Alarm Bell
15 Heat Detectors (or other fire
detection devices)
16- Automatic Sprinklers
17- Water Supply Pressure Gauge
18- System Air Pressure Gauge
lQ- Diaphragm Chamber Pressure
Gauge
A- Power Supply To Panel
B- Audible Alarm Circuit
C- Fire Detection Initiating Circuit
D- Waterflow Alarm Initiating Circuit
E- Supervisory Alarm Initiating Circuit
F- Releasing Circuit
- .-
FIGURE A
MODEL F470 ELECTRIC/PNEUMATIC
DOUBLE INTERLOCK PREACTION SYSTEM
- SCHEMATIC OF TYPICAL ARRANGEMENT-
1 l- Water Motor Alarm (optional)
12- Deluge Valve Releasing Panel
with Battery Back-Up
G- Manual Pull Initiating Circuit
The 4 and 6 inch (100 and 150 mm)
Model F470 Electric/Pneumatic Dou-
ble interlock Preaction Systems (Ref.
Figure A) are designed for use in ap-
plications, such as refrigerated areas,
requiring the maximum degree of pro-
tection .against inadvertent flooding of
the sprinkler system piping.
The F470 Electric/Pneumatic Double
Interlock Preaction System utilizes a
Model F470 External Resetting Multi-
mati& Deluge Valve and a Model
F520 or F5201 Swing Check Valve,
with releasing trim consisting of both a
Solenoid Valve and a Dry Pilot Actua-
tor in a series configuration. The Swing
Check Valve isolates the Deluge Valve
from the system air pressure, which
holds the Dry Pilot Actuator closed.
The Solenoid Valve remains closed
until it is electrically energized by a
deluge valve releasing panel (auto-
matic control unit) that is operated by
either a fire detection device or manual
pull station.
In order for the Double Interlock Pre-
action System to automatically actu-
ate, two independent events must
occur. The deluge valve releasing
Printed in U.S.A. 1-96
TD1151
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