Viking FIRECYCLE III-OH Quick Start Manual

April 20, 2006
1. SYSTEM NAME
Viking Firecycle® III-OH Cycling Double
Interlocked Preaction System
2. MANUFACTURER
The Viking Corporation
210 N. Industrial Park Road
Hastings, Michigan 49058 U.S.A.
Telephone: (269) 945-9501
(877) 384-5464
Facsimile: (269) 945-9599
Email: techsvcs@vikingcorp.com
3. SYSTEM DESCRIPTION
(Refer to Figures 1 & 2.)
The Viking Firecycle® III-OH Cycling
Double Interlocked Preaction System uti-
lizes a Viking Model H or J Flow Control
Valve (A.1), a Viking Easy Riser™ Check
Valve (A.2) for 3", 4" & 6" or Model L-
1 Check Valve for 1-1/2" and 2", and a
Firecycle® III Control Panel (E.3), with
additional valves, devices, and trim to form
a unique operating system. The system
piping is normally dry and may be installed
in locations subject to freezing. The sys-
tem piping is pneumatically pressurized
[Minimum 30 psi (207 kPa) for 175 psi
systems] and [Minimum 50 psi 346 kPa)
for 175-250 psi systems] to monitor the in-
tegrity of the piping, fittings, and sprinklers
and to act as a fail-safe emergency backup
to the electrical detection system.
In addition to automatically detecting a fire
and turning the system on, Firecycle® III-
OH has the added ability to sense when
the fire has been controlled, and automati-
cally turn off the water flow once a prepro-
grammed "Soak Timer" has been satis-
fied. If the fire rekindles, the Firecycle®
III-OH will initiate the sequence again. This
unique cycling feature will repeat as long
as power is available to the panel, helping
to minimize water usage, water damage,
and the danger of pollution to surrounding
areas. Batteries are available to provide up
to ninety (90) hours of emergency power.
If the A.C. Power fails and the battery
backup power drops below 16 volt DC
while the system is operating, the double
interlocked preaction system will "fail-safe",
and continue flowing until A.C. Power is
restored or the system is manually shut-
off.The Firecycle® III-OH Cycling Double
Interlocked Preaction system has sever-
al fail-safe features, some of which are
not available on other preaction systems.
Refer to Section B "System Operation" for
details.
Preaction systems are commonly used to
help minimize accidental water damage
and still provide fast water discharge dur-
ing a fire. Consult all Authorities Having
Form No. F_050102
TECHNICAL DATA
Jurisdiction prior to installing a Firecycle®
III-OH Preaction System. The system re-
quires use of a Viking Flow Control Valve
and trim kit with two electric Release
Solenoid Valves (E.1) and (E.2) con-
trolled by the Firecycle® III Control Panel
(E.3), Firecycle®-OH Detectors (E.4), and
Detector Cable (E.5). The detector tem-
perature must be lower than the lowest
temperature rated sprinkler being used.
For proper location, spacing, and position-
ing of detectors, refer to Technical Data de-
scribing Viking Firecycle®-OH Detectors. A
"Double Interlocked" system requires both
electrical detection and loss of system air
pressure before water is allowed to enter
the system piping.
The Firecycle® lll-OH Double Interlocked
Pre-Action system is utilized in areas of
Ordinary Hazard Occupancy application
or hazards of less severity than Ordinary
Hazard. If extra hazard or storage applica-
tions are present, a Firecycle® lll Double
Interlocked Preaction system is required
as it is designed for higher hazards.
The Firecycle® lll-OH system utilizes many
of the same components as a standard
Firecycle® system. A Firecycle® valve
package and Firecycle® release control
panel is required for a Firecycle® lll-OH
system. The release devices utilized in a
Firecycle® lll-OH system are different than
those utilized in a standard Firecycle lll
system. Refer to Model C Firecycle®-OH
detectors for the installation requirements
for a Firecycle® lll-OH release system.
NOTE: Firecycle® III-OH is a complete
system, and is listed as a unit. As such,
it is normally not possible to modify the
components of the system controls or
their inter-relation without compromising
the listing.
4. TECHNICAL DATA
Listings and Approvals
For technical data, installation,
maintenance, and testing in-
structions for individual system
components, refer to current
Viking technical data describing
individual components of the
system being used.
Viking technical data may be found on
The Viking Corporation's Web site at
http://www.vikingcorp.com
The Web site may include a more recent
edition of this technical data page.
U.L. Listed - Guide No. VLLA
FM Approved
NYC Dept. of Buildings - MEA 89-92-E
Vol. XXIII
FIRECYCLE® III-OH CYCLING
DOUBLE INTERLOCKED
PREACTION SYSTEM
7. SYSTEM OPERATION
(Refer to Figure 1 on page 432 d.)
In the SET condition:
System water supply pressure enters the
priming chamber of the Flow Control Valve
(A.1) through the 1/4" (8 mm) priming
line, which includes a normally open prim-
ing valve (B.1), strainer (B.2), 0.125 dia.
restricted orifice (B.3), and check valve
(B.4). In the SET condition, water sup-
ply pressure is trapped in the priming
chamber by a check valve (B.4), normally
closed Release Solenoid Valve #1 (E.1),
Pneumatic Actuator (B.6), and normally
closed Emergency Release (B.11). Water
Supply pressure in the priming chamber
holds the clapper of the Flow Control Valve
(A.1) on the seat due to the differential
design of the valve and spring pressure.
The clapper separates the inlet chamber
from the outlet chamber, keeping the outlet
chamber and system piping dry.
In fire conditions:
In fire conditions, when the Firecycle®
III-OH release system (E.4 and E.5) oper-
ates, the Firecycle® III Control Panel (E.3)
activates a piezo sounder and initiates the
appropriate detection alarms. No water en-
ters the system piping at this time. When
a sprinkler operates, as from a fire, sys-
tem supervisory air pressure is lost, and
the Low Air Pressure Supervisory Switch
(E.6) is activated only after both indicating
circuits have operated. The Firecycle® III
Control Panel (E.3) energizes normally
closed Release Solenoid Valve #1 (E.1)
open and normally open Release Solenoid
Valve #2 (E.2) closed. Pressure is re-
leased from the priming chamber faster
than it is supplied through a restricted
orifice (B.3). The Flow Control Valve (A.1)
clapper opens to allow water to flow into
the system piping and to any optional
alarm devices, such as an alarm pressure
switch and/or a water motor gong. Water
entering the system operates and hydrauli-
cally latches the Pressure Operated Relief
Valve (PORV) (B.10) open. Water will flow
from any open sprinklers. Water discharg-
es until all Firecycle®-OH Detectors have
reset. (cooled below their set point). After
all detectors have reset, the Firecycle® III
Control Panel (E.3) activates the "Soak
Timer", allowing the system to continue
discharging water for a preset time period.
When the "Soak Timer" has expired, the
Firecycle® III Control Panel (E.3) de-en-
ergizes normally closed Release Solenoid
Valve #1 (E.1), allowing it to close. (The
normally open Release Solenoid Valve
#2 (E.2) remains energized closed until
the Firecycle® III Control Panel is manu-
Revised page replaces page 432a-e dated July 23, 2002
(Added Straight Through Schematic)
Firecycle III-OH 432a