Tyco DV-5A Manual page 12

TFP1325
Page 12 of 20
Valve Setting
Procedure
Perform Steps 1 through 13 when ini-
tially setting the TYCO DV-5
Remote-Resetting Trim for service or
after an operational test of the fire pro-
tection system (Ref. Figure 9).
Step 1. Close the System Main Control
Valve (B).
Step 2. Close the Diaphragm Supply
Valve (P).
Step 3. Open the Main Drain Valve
(D) and System Drain Valve (E). Close
the System Drain Valve (E) after water
ceases to discharge. Leave the Main
Drain Valve (D) open.
At this time make certain that the
Pressure Gauge Valves and the Alarm
Control Valve (H), as applicable, are
open.
Step 4. Depress the plunger of the
Automatic Drain Valve (F) to verify that
it is open.
Step 5. Clean the Diaphragm Supply
Strainer (Q) by removing the clean-
out plug and strainer basket. The Dia-
phragm Supply Strainer (Q) may be
flushed out by momentarily opening
the Diaphragm Supply Valve (P).
Step 6. Reset the electric detection
system in accordance with the manu-
facturer's instructions to de-energize
the solenoid valve.
Step 7. Operate (open) the Manual
Control Station (M) and then open
the Diaphragm Supply Valve (P). After
unaerated water ceases to discharge
from the Manual Control Station (M)
drain tube, slowly close the operating
Valve with
A
lever by pushing it up. Do not close the
hinged cover at this time.
Step 8. Inspect drain connections from
the Manual Control Station and Sole-
noid Valve. Before proceeding to the
next step, correct any leaks.
Step 9. Verify the ability for the DV-5
Diaphragm to hold pressure as follows:
• With the diaphragm chamber pres-
surized per Step 7, temporarily close
the Diaphragm Supply Valve (P), and
then observe the Diaphragm Gauge
(K) for a drop in pressure.
• If a drop in pressure is noted, the
DV-5 Diaphragm is to be replaced
A
and/or any leaks must be corrected
before proceeding to the next step.
• If the Diaphragm Gauge (K) indicates
no drop in pressure, re-open the Dia-
phragm Supply Valve (P) and pro-
ceed to the next step.
Step 10. Partially open the System
Main Control Valve (B). Slowly close the
Main Drain Valve (D) as soon as water
discharges from the Main Drain Valve
(D). Observe the Automatic Drain Valve
(F) for leaks. If there are leaks, deter-
mine/correct the cause of the leakage
problem before proceeding.
NOTICE
When the System Main Control Valve
(B) is partially opened, the pressure on
the DV-5 Diaphragm Chamber may
A
increase. This increase in pressure is
normal, and if the pressure is greater
than the valve trim maximum pressure
rating provided in the Technical Data
section, the pressure is to be relieved
to at least the valve trim pressure rating
by partially and temporarily opening the
Manual Control Station (M); however,
do not allow the pressure as indicated
A
on the Diaphragm Gauge (K) to drop
below the supply pressure shown on
the Water Supply Gauge (J), since
this action may result in tripping of the
DV-5 Valve.
A
Step 11. Close the hinged cover of the
Manual Control Station Valve (M) and
insert a new break rod in the small hole
through the top of the enclosing box.
Step 12. Fully open the System Main
Control Valve (B).
Step 13. After setting a fire protec-
tion system, notify the proper authori-
ties and advise those responsible for
monitoring proprietary and/or central
station alarms.