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ed. One terminal box contains all of the 24 VDC connections and
one contains the 120 VAC (or 220 VAC) connections. The diagrams
illustrating this translation of terminals are shown in Figures 2 and 3.
The Reliable Model H PrePaK is delivered with five factory-installed
electrical devices. They consist of the following:
1.  A low air, supervisory pressure switch, which is used to monitor

sprinkler piping.

2.  A waterflow indicating pressure switch.
3.  A releasing solenoid valve.
4.  A 1/6 HP tank-mounted air compressor.
5.  A supervised, slow-close control valve.

The factory electrical connections for these devices are illustrated

in Figure 4. For information on how to install fire detection devices to
Initiating Zones 1 and 2, refer to Figures 5 or 6. For information on
how to install output devices, i.e., alarm bells or trouble annunciators,
refer to Figure 7. The power supply, standby emergency power
supply, battery charger and rectifier circuitry are all contained within
the PFC-4410-RC Panel. Batteries that provide 90 hours of standby
power are provided with the panel. For additional information and
detailed wiring diagrams, refer to Potter Manual #5403550, Installa-
tion, Operation and Instruction of PFC-4410-RC Releasing Control
Panel.

Note:

In order for the solenoid valve to maintain Reliable’s war-
ranty it must remain sealed as it came from the factory. If
there are concerns about the valve’s internal components,
immediate replacement is recommended.

System Operation (Single Interlock)

To activate the Reliable Model H 1½” (40mm) PrePaK in a single

interlock application, an electrical detector (two detectors with cross-
zoned detection) must activate to fill the system with waters. Sub-
sequently, a sprinkler head must open to discharge water on the
fire. When a fire is detected, the releasing control panel energizes
the solenoid valve open and water flows from the supply through
the PrePaK to the system and to the waterflow indicating pressure
switch. The valve maintains its open position until the solenoid is
de-energized.

CAUTION:

THE SOLENOID VALVE MUST BE MAINTAINED

OPEN TO PREVENT AUTOMATIC CLOSING OF THE MODEL H
DELUGE RISER ASSEMBLY. THE POTTER MODEL PFC-4410-
RC RELEASING CONTROL PANEL HAS A LATCHING FEATURE
FOR THIS PURPOSE.

After system shutdown and draining, the Model H Riser Assem-

bly is easily reset without special tools. Restore detection devices
by resetting or replacing any operated device. Once detection de-
vices are restored, reset the releasing control panel (Potter Manual
#5403550) and the supply pressure (see Bulletin 507, System Op-
eration).

System Operation (Double Interlock)

To activate the Reliable Model H 1½” (40mm) PrePaK in a double

interlock application, two independent events must coexist before
water flow will occur. A fire detection device must operate and the
system pressure switch must actuate by reducing the system su-
pervising air pressure (as a result of sprinkler operation). Operation
of either one of these items will only cause an alarm to annunciate,
and will not fill the sprinkler system piping with water. With coexisting
initiating signals, one electric and one pneumatic, the control panel
will now energize the solenoid valve to release water through the

PrePaK into the system piping and out the open sprinkler for com-
plete operation of the system.

When the releasing control panel energizes the solenoid valve

open, water flows from the supply through the riser into the system
and to the waterflow indicating pressure switch. The valve main-
tains its open position until the solenoid is de-energized.

CAUTION:

THE SOLENOID VALVE MUST BE MAINTAINED

OPEN TO PREVENT AUTOMATIC CLOSING OF THE MODEL H
DELUGE RISER ASSEMBLY. THE POTTER MODEL PFC-4410-
RC RELEASING CONTROL PANEL HAS A LATCHING FEATURE
FOR THIS PURPOSE.

After system shutdown and draining, the Model H Riser Assem-

Maintenance

The Reliable Model H 1½” (40mm) PrePaK and associated equip-

ment shall periodically be given a thorough inspection and test.
NFPA 25, Inspection, Testing and Maintenance of Water Based Fire
Protection Systems, provides minimum maintenance requirements.
Systems should be tested, operated, cleaned and inspected at
least annually, and parts replaced as required. Periodically, open
the bleeder valve on the compressor tank to drain any condensate
accumulation. Refer to Bulletin 507 for information regarding main-
tenance of the solenoid valve and the manual emergency station
valve. Bulletin 251 provides information on the Model A-2 Pressure
Maintenance Device. Bulletin 806 describes the Model G Right-
Check™ Valve. Potter Manual #5403550 describes the PFC-4410-
RC Releasing Control Panel.

Resetting Single Interlock Systems

Refer to Figure 1.
1. Close the supervised valve controlling water supply to the Mod-

el H Riser Assembly and shut off the system air supply at the
Model A-2 Device.

2. Open all drain valves and the manual emergency station valve

to drain the system through the riser assembly.

3. Open any low point drain valves and vents throughout the sys-

tem, closing all drain valves and vents when draining of water
has stopped.

4. Inspect and replace any portion of the sprinkler system and de-

tection system exposed to fire conditions. Reset detectors and
PFC-4410-RC Releasing Control Panel. The PFC-4410-RC is
reset by pushing the “System Reset” button. This action will
also close (reset) the solenoid valve.

5. Reset the Model H Riser Assembly in accordance with Bulletin

507, Model H Deluge Riser Assembly Instructions for Installa-
tion, Operation, Care and Maintenance.

6. Restore the system supervising pressure to approximately 10

psi (0.7 bar) by opening the valves on the Model A-2 Pressure
Maintenance Device (refer to Bulletin 251) and adjusting the
regulator, as required.

7. Verify that the supervised control valve is open, and proper

monitoring has been restored. Also verify there is no leakage
from the automatic drain valve, thereby confirming that supply
water is not leaking into the system.