11
12
A. Immediately verify whether or not
a fire situation is present. If a fire
condition does exist, notify the
local fire service and follow the
plan prescribed by the Authority
Having Jurisdiction.
B. If a fire condition does not exist:
1. Close the Diaphragm Chamber
Supply Control Valve (Fig. D).
2. Close the system’s Main Control
Valve (Fig. A).
3. Open the Main Drain Valve (Fig.
D) at the rear of the F470 Deluge
Valve.
4. If the system has been flooded,
open the System Main Drain
Valve at the side of the
F52O/F5201 Check Valve (Fig.
C), Inspector’s Test Connection,
and all auxiliary drains in the sys-
tem piping. Check to see that the
drainage water will not cause
damage or result in dangerous
conditions.
5. Notify the alarm monitoring sta-
tions (if applicable) as well as the
Authority Having Jurisdiction that
there is an impairment to the fire
protection system.
6. Determine if the false alarm was
caused by the electric fire detec-
tion system or a low air pressure
condition and then promptly cor-
rect the impairment and return the
fire protection system to service,
as soon as possible.
sure of 40 psi (2,8 bar). The Pres-
sure Relief Valve may be reset;
however, it must be be reset to
relieve at a pressure which is in
accordance with the requirements
of the Authority Havng Jurisdiction.
To reset the Pressure Relief Valve,
first loosen the jam nut and then
adjust the cap accordingly -
clockwise for a higher pressure
setting or counterclockwise for a
lower pressure setting. After verify-
ing the desired pressure setting,
tighten the jam nut.
Suitable provision must be made
for disposal of drain water. Drain-
age water must be directed such
that it will not cause damage or
result in dangerous conditions.
All conduit and electrical connec-
tions are to be made in accordance
with the requirements of the Au-
thority Having Jurisdiction and/or
the National Electrical Code.
The Double Interlock Preaction Sys-
tem will not automatically reset after an
operation. It must be manually reset
and it should be restored to service as
soon as possible.
NOTES
It is recommended that the individual
responsible for placing the Double Zn-
terlock Preaction System in service de-
velop a working understanding of the
system in general, prior to placing it
in operation. These instructions, as
well as individual instructions for the
deluge valve, swing check valve, dry
pilot actuator, solenoid valve, manual
control station, switches, accelerator
(if applicable), and pressure mainte-
nance device should be reviewed.
After placing a fire protection system
in service, notify the proper authori-
ties and advise those responsible for
monitoring proprietary and /or cen-
tral station alarms.
The procedure is as follows:
1. Close the Diaphragm Chamber
Supply Control Valve (Fig. D).
2. Operate (open) the Manual Control
Station (Fig. D) to assure that the
F470 Deluge Valve Diaphragm
Chamber is vented.
3. Close the Double Interlock System
Main Control Valve (Fig. A), Air
Supply Control Valve (Fig. C), and,
if applicable, the Accelerator Con-
trol Valve (Fig. C).
4. Open the System Main Drain Valve
(Fig. C), Main Drain Valve at the
rear of the F470 (Fig. D),
Inspector’s Test Connection, and
all auxiliary drains in the system
piping. Check to see that the drain-
age water will not cause damage
or result in dangerous conditions.
NOTE
Do not open the Inspector’s Test
Connection and auxiliary drains
if resetting after a system test; oth-
erwise, system airpressure will be
relieved unnecessarily.
Inspect for and clear all ice plugs,
where system piping has been ex-
posed to freezing conditions and
when there has been a flow of
water into the system.
Close the System Main Drain
Valve. Insoector’s Test Connec-
tion, and ail auxiliary drains in the
system piping. Leave the Main
Drain Valve at the rear of the F470
open.
Depress the plunger of the Auto-
-8-
matic Drain Valve (Fig. D), to verify
that it is open and that the F470
Deluge Valve has been completely
drained.
8. Clean out the Strainer (Fig. D) in
the connection to the F470 Deluge
Valve Diaphragm Chamber.
9. Push the F470 Reset Knob inward
to allow the Clapper to reseat.
Under normal circumstances, the
reseating of the Clapper can be
heard. However, after the system
inspection procedure, for example,
due to minimal flow through a par-
tially opened main control valve,
the Clapper may not have latched
fully open. In this case, the reseat-
ing sound of the Clapper will not be
heard.
10. Close the Manual Control Station
(Fig. D) by pushing the operating
lever up. Do not close the hinged
cover at this time.
Il. Open the Alarm Control Valve (Fig.
D), if it was closed to silence local
alarms.
It is recommended that the Alarm
Control Valve be wire sealed in the
open position with a No. 16 twisted
wire, the ends of which are se-
cured by a lead seal. The wire seal
should be looped through the hole
in the handle and tightly twisted
around the pipe nipple adjacent to
the handle.
12. Replace all damaged or operated
sprinklers. Replacement sprinklers
must be of the same type and tem-
;;;;rtre rating as those which op-
NOTE
In order to prevent the possibility
of a subsequent operation of an
overheated solder type sprinkler,
any solder type sprinklers which
were possibly exposed to a temper-
aturegreater than their maximum
rated ambient must also be re-
placed.
13. Service the air dryer, if applicable,
in accordance with the man-
ufacturer’s instructions.
14. Open (energize) the Solenoid
Valve by manually operating the
deluge valve releasing panel.
15. Open the Diaphragm Chamber
Supply Control Valve (Fig. D) and
allow water to discharge from the
Dry Pilot Actuator. Close the Dia-
phragm Chamber Supply Control
Valve when air is no longer present
in the discharge from the Dry Pilot
Actuator.
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