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OPERATING PRINCIPLES
The Model F470H Horizontal Multi-
matic Deluge Valve is a differential
latch type valve which depends upon
water pressure in the Diaphragm
Chamber to hold the Clapper closed
against the water supply pressure. The
nominal trip ratio is 2.5 to 1, i.e., the
F470H Valve operates (opens) when
the pressure in the Diaphragm Cham-
ber is reduced to approximately 40
percent of the water supply pressure.
When the F470H Valve is set for serv-
ice, the Diaphragm Chamber is pres-
surized through the trim connections
from the inlet side of the system's main
control valve, for example an O.S.&Y.
gate valve or butterfly valve (Ref. Fig-
ure C). Opening of an actuation device,
for example the solenoid valve in the
Electric Actuation Trim (Ref. Fig. D),
releases water from the Diaphragm
Chamber faster than it can be replen-
ished through the 1/8 inch (3,2mm)
Restriction in the Diaphragm Chamber
Supply Connection. This results in a
rapid pressure drop in the Diaphragm
Chamber and the force differential ap-
plied through the Clapper Latch to hold
the Clapper down in the set position is
reduced to below the valve trip point.
The water supply pressure then forces
the Clapper open permitting water to
flow into the system piping, as well as
through the Alarm Port to actuate the
system alarms.
When the system main control valve is
closed to stop waterflow into the sys-
tem, the Clapper, by design, remains
open until it is manually reset.
INSTALLATION
NOTES
Proper operation of the Model F470H
Horizontal Multimatic Deluge Valves
depends upon their trim being in-
stalled in accordance with the in-
structions given in this Technical
Data Sheet. Failure to follow the ap-
propriate trim diagram may prevent
the F470H Valve from functioning
properly, as well as void listings, ap-
provals, and the manufacturer's war-
ranties.
The F470H Valve must be installed in
a readily visible and accessible loca-
tion.
The F470H Valve, associated trim,
and wet pilot lines must be main-
tained at a minimum temperature of
40°F/4°C.
Heat tracing of the F470H Valve or its
associated trim is not permitted. Heat
tracing can result in the formation of
hardened mineral deposits which are
capable of preventing proper opera-
tion.
The Model F470H Horizontal Multi-
matic Deluge Valve is to be installed in
accordance with the following criteria:
1a. Flange mounting fasteners are to be
tightened uniformly using a cross-
draw sequence. Fastener specifica-
tions are to be as required by the
authority having jurisdiction. Tight-
ening torques are to be as indicated
below.
Valve
Fastener
Size
Size
4"
5/8" (M16)
6"
3/4" (M20)
1b. All nipples, fittings, and devices must
be clean and free of scale and burrs
before installation. Use pipe thread
sealant sparingly on male pipe
threads only.
NOTE
It is recommended that internally
galvanized pipe and cast iron fit-
tings be used for wet or dry pilot
lines.
2. The F470H Valve must be trimmed
in accordance with Figure D.
3. Care must be taken to make sure
that check valves, strainers, globe
valves, etc. are installed with the flow
arrows in the proper direction.
4. Drain tubing to the drip funnel must
be installed with smooth bends that
will not restrict flow.
5. The main drain and drip funnel drain
may be interconnected provided a
check valve is located at least 12
inches (300 mm) below the drip fun-
nel.
6. Suitable provision must be made for
disposal of drain water. Drainage
water must be directed such that it
will not cause accidental damage to
property or danger to persons.
7. Connect the Diaphragm Chamber
Supply Control Valve to the inlet side
of the system's main control valve in
order to facilitate setting of the
F470H Valve (Ref. Figure C).
8. An Inspector's Test Connection, as
described in the Technical Data sec-
tion, must be provided for Wet or Dry
Pilot Actuation systems.
9. An Air Maintenance Device, as de-
scribed in the Technical Data Sec-
tion, must be provided for Dry Pilot
Actuation.
-7-
10. A desiccant dryer, when specified for
Dry Pilot Actuation, is to be installed
between a drip leg and the Air Main-
tenance Device.
11. The Low Pressure Alarm Switch for
Dry Pilot Actuation is to be adjusted
as follows:
•
Low pressure alarm setting at
approximately 6 psi (0,4 bar)
below the minimum pilot line
service pressure requirement
shown in Graph C.
•
Fire alarm setting at approxi-
mately 15 psi (1,0 bar) below
the minimum pilot line service
pressure requirement shown
Torque
in Graph C.
Ft. Lbs. (Nm)
40-50 (54-68)
12. Unused pressure alarm switch con-
50-65 (68-81)
nections must be plugged.
13. The Pressure Relief Valve provided
with the Dry Pilot Actuation Trim is
factory set to relieve at a pressure of
approximately 45 psi (3,1 bar),
which can typically be used for a
maximum normal dry pilot actuation
system pressure of 40 psi (2,8 bar).
The Pressure Relief Valve may be
reset; however, it must be be reset to
relieve at a pressure which is in ac-
cordance with the requirements of
the authority having jurisdiction.
To reset the Pressure Relief Valve,
first loosen the jam nut and then
adjust the cap accordingly — clock-
wise for a higher pressure setting or
counterclockwise for a lower pres-
sure setting. After verifying the de-
sired pressure setting, tighten the
jam nut.
14. Conduit and electrical connections
are to be made in accordance with
the requirements of the authority
having jurisdiction and/or the Na-
tional Electric Code.
VALVE SETTING PROCEDURE
Steps 1 through 14 are to be per-
formed when initially setting the Model
F470H Horizontal Multimatic Deluge
Valve; after an operational test of the
fire protection system; or, after system
operation due to a fire.
1. Close the Diaphragm Chamber Sup-
ply Control Valve.
2. Close the Main Control Valve, and if
the system is equipped with Dry Pilot
Actuation, close the Air Supply Con-
trol Valve (Ref. Figure D).
3. Open the Main Drain Valve and all
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