Reliable H PrePak, Инструкции по установке, эксплуатации, уходу и обслуживанию

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8.
Testing Detection System Without Causing
Water Flow (Single Interlock)
Refer to Figure 1.
1. Close the supervised valve controlling water supply to the Mod-
el H Riser Assembly, and note the water pressure gauge read-
ing. Also, shut off the system air at the Model A-2 Device.
2. Operate the detection system - operate a cross-zoned releas-
ing control panel by operating two detectors.
3. Operation of the detection system must result in a sudden drop
of water pressure as the solenoid valve opens. When the water
pressure gauge drops to zero, open main drain valve, bypass
drain valve and manual emergency station valve until all water
above the supervised control valve drains away.
4. Reset detection system - reverse operations performed in Step
“2” above. All detection devices must be reset before the PFC-
4410-RC Releasing Control Panel can be reset. The solenoid
valve closes when the releasing panel is reset. Close the by-
pass drain valve and manual emergency station valve.
5. Slightly open the supervised valve controlling water supply to
the Model H Riser Assembly, closing main drain valve when
water flows steadily. Open slowly, but fully, the supervised con-
trol valve and monitor it properly.
6. It is necessary to shut down the supervisory pressure supply
(ref. Step “1”) during testing; otherwise, low pressure annuncia-
tion can occur when the drain valves are opened in Step “3”.
Restore the supervisory pressure to 10 psi (0.7 bar) at this time.
Testing Detection System Without Causing
Water Flow (Double Interlock)
Refer to Figure 1.
1. Close the supervised valve controlling water supply to the Mod-
el H Riser Assembly, and note the lower water pressure gauge
reading.
2. Operate a double interlock system by operating one detector
and also venting the supervising pressure, through the inspec-
tors test station, below 4 psi (0.3 bar), to operate the low air pres-
sure switch.
3. Operation of a detector and the system pressure switch must
result in a sudden drop of water pressure as the solenoid valve
opens. When the water pressure gauge drops to zero, open
the main drain and bypass drain valves until all water above the
supervised control valve drains away.
4. Reset system by following the operation described previously in
Steps “5” through “7” of the section named “Resetting Double
Interlock Systems.” All detection devices must be reset before
the PFC-4410-RC Releasing Control Panel can be reset.
5. Open slightly the supervised valve controlling water supply to
the Model H Riser Assembly, closing the main drain valve after
water flows steadily through it. Open slowly, but fully, the control
valve and supervise it properly. Verify there is adequate water
supply pressure and proper pneumatic supervisory pressure
on the appropriate gauges. There should be no pressure
reading on the water gauge directly above the manual emer-
gency releasing station when the system is properly reset.
Resetting Double 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’s air supply at the
Model A-2 Device.
2. Open all drain valves and the manual emergency station valve
to drain the system.
3. Open all the drain valves and vents at low points throughout the
system, closing them when flow of water to drain has stopped.
4. Inspect and replace any portion of the sprinkler system and
detection system exposed to fire conditions. Reset detectors.
Note:
It is not possible to reset the PFC-4410-RC panel until
Step “6”, which resets the system pressure switch, has been
completed.
5. Restore the system supervising pressure to approximately 10
psi (0.7 bar) by opening valves on the Model A-2 Pressure
Maintenance Device (refer to Bulletin 251) and adjusting the
regulator, as required.
6. Verify that the bypass drain valve is closed to prevent the loss
of pneumatic supervising pressure out of the automatic drain
valve. When the supervising pressure has reached the 10 psi
(0.7 bar) setting, the low air pressure switch will automatically
reset (contacts now open).
7. With the low air pressure switch reset (Step “6”) and all detec-
tors replaced or reset (Step “4”), the PFC-4410-RC Releasing
Control Panel can be reset. Pushing the “System Reset” button
on the panel will simultaneously restore the solenoid valve to the
closed condition.
8. Restore water supply to the Model H Riser Assembly in ac-
cordance with Bulletin 507, Model H Deluge Riser Assembly
Instructions for Installation, Operation, Care, and Maintenance.
Inspection and Testing of Single Interlock
Refer to Figure 1.
1. Water supply - be sure the supervised valve controlling water
supply to the Model H Riser Assembly is open fully and prop-
erly supervised.
2. Other trimming valves - check that all pressure gauge valves
are open, and that the Model A-2 Pressure Maintenance De-
vice ¾” NPT fill valve is closed. The two ¼” NPT bypass line
valves must be fully open.
3. Check that system supervising pressure is approximately 10
psi (0.7 bar).
4. Operation test - for detection only, operate by actuation of a
keyed manual (electrical) emergency station (refer to Figure 5
for wiring instructions). Double interlock systems also require
the supervisory pressure to be discharged, through the inspec-
tors test station or other venting means, below 4 psi (0.3 bar)
before total system operation will occur.
Note:
Total system operation testing will cause water flow
through the Model H Riser Assembly and into the system.
Where difficulty in performance is experienced, contact Reli-
able Technical Services before any field adjustment is to be
made.