Optional Shut-Off Valve And Sight Glass; Optional Semi-Flanged Inlet/Outlet - FireFlex Systems Inc. N2 BLAST Owner's Operation & Maintenance Manual

4.10 OPTIONAL SHUT-OFF VALVE AND SIGHT GLASS

The shut-off valve & sight glass option is intended to be
used for applications where testing of the system operation
without filling the sprinkler piping network is desirable and
where it is critical that all functions of the preaction system
be tested under actual discharge conditions.
Operation of the shut-off valve
Inspection of the system can be implemented without filling
the sprinkler piping system with water.
1. CLOSE the shut-off valve (D4).
2. OPEN the main drain valve (D3).
3. Simulate the operation of the system to open the
deluge valve (A1) (refer to chapter 4.8.6 ANNUAL
INSPECTION). Verify that water flows through the
sight glass assembly (D5).
4. Once tests are completed, make sure the main drain
valve (D3) is completely CLOSED. Reset the system
(refer to chapter 4.6 PLACING THE SYSTEM BACK IN
SERVICE AFTER OPERATION).
5. FULLY OPEN the system shut-off valve (D4). Reset
the remote releasing control panel.
Figure 4.7 - Shut-off valve option
Sight Glass
Assembly (D5)
Point flash light here
Supervised
Shut-off Valve (D4)
Deluge (A1) or
Flow Control (A2)
Valve
Supervised
Water Supply
Control Valve (D1)
FM-076B-0-6A
F F
IRE LEX
Integrated Fire Protection System
O ' O
WNER S PERATION
Main Drain
Valve (D3)
Riser Check
Valve (D2)
FM-061H-0-75B
® ®
N B
LAST
2
& M M
AINTENANCE ANUAL

4.11 OPTIONAL SEMI-FLANGED INLET/OUTLET

When required by the user, F
can be provided in a semi-flanged configuration.
The semi flanged option provides flanged fittings only
on the water inlet pipe (left side) and on the system
riser outlet. The drain manifold is provided with a
threaded connection (left side). The rest of the fittings
are the same as usual with the main components being
provided in
configuration.
Figure 4.8 - Semi-flange option
Flanged fitting outside cabinet
(when provided)
®
F N
IRE LEX
2
the standard flanged
Flanged fitting outside cabinet
(when provided)
Threaded end
Field Connection
to Open Drain
(specify side)
Field connection
to Water Supply
(specify side)
®
Blast unit
/ grooved
FM-061H-0-77B
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