Care And Maintenance - Johnson Controls tyco DV-5A Manual

TFP1485
Page 14 of 20
Care and
Maintenance
The following procedures and inspec-
tions must be performed as indicated,
in addition to any specific requirements
of EN12845. Any impairment must
be immediately corrected. Refer to
Figure 8.
NOTICE
If the water supply needs to be shut off
to the DV-5 valve and trim and cannot
a
be shut off upstream of the system,
close the System Main Control Valve
(B), the Diaphragm Supply Valve (P),
and the Inverted Flare Shut-Off Valve
(R). This will allow any trim above the
System Main Control Valve (B) to be
taken apart for service if necessary.
The frequency at which the following
procedures and inspections are to be
performed are to be in accordance with
EN12845.
Before closing a fire protection system
main control valve for maintenance
work on the fire protection system that
it controls, permission to shut down
the affected fire protection systems
must first be obtained from the proper
authorities and all personnel who may
be affected by this action must be
notified.
Some of the procedures outlined in
this section will result in operation of
the associated alarms. Consequently,
notification must first be given to the
owner and the fire department, central
station, or other signal station to which
the alarms are connected.
The owner is responsible for the
inspection, testing, and maintenance
of their fire protection system and
devices in compliance with this docu-
ment, as well as with applicable stan-
dards of EN12845 in addition to the
standards of any authority having juris-
diction. Contact the installing contrac-
tor or product manufacturer with any
questions.
Some procedures in this section result
in the operation of the associated
alarms. Notify the owner and the fire
department, central station, or other
signal station to which the alarms are
connected before performing the tests.
It is recommended that automatic
sprinkler systems be inspected, tested,
and maintained by a qualified Inspec-
tion Service in accordance with local
requirements and/or national codes.
Drop in Water Supply Pressure
Below Normal Range
NOTICE
If the water supply pressure is signif-
icantly reduced below the normally
expected static pressure range (as
could occur in the case of a water main
break or repair), and there is a subse-
quent drop in the diaphragm chamber
water pressure below its normal range
(for example, due to a leak in a piping
connection to or from the diaphragm
chamber or, a leak in the diaphragm
chamber check valve caused by dirt or
debris in the check valve seal area), a
valve such as the DV-5 could inadver-
a
tently trip, if its water supply pressure
is quickly restored.
A drop in the water supply pressure
to below its normal range (as in the
case of an interrupted water supply
condition) constitutes an emergency
impairment.
Should this condition occur, immedi-
ately close the main control valve and
use the following procedure to reset the
system:
Step 1. Prior to the water supply pres-
sure being restored to the closed
System Main Control Valve (B), note the
pressure indicated by the Diaphragm
Gauge (K) and determine if the pres-
sure is within the normally expected
range.
Step 2. If the diaphragm chamber pres-
sure is below the normal range, check
for and correct any source of leakage
from the diaphragm chamber prior to
resetting the system.
Step 3. After the water supply pres-
sure is restored to the System Main
Control Valve (B), reset the DV-5
in accordance with the Valve Setting
Procedure section.
NOTICE
For fire protection systems subject to
an emergency impairment caused by
an interrupted water supply condition,
it is recommended that consideration
be given to installing a low water supply
pressure switch with the appropriate
alarm/indications to monitor the water
supply pressure.
Waterflow Alarm Test Procedure
To test the waterflow alarm, open the
Alarm Test Valve (G), which will allow a
flow of water to the Waterflow Pressure
Switch (C) and/or Water Motor Alarm.
Upon satisfactory completion of the
test, close the Alarm Test Valve (G).
To ensure drainage of the alarm line,
depress the plunger on the Automatic
Drain Valve (F).
Solenoid Valve
Test Procedure For
Electric Actuation
Proper operation of the Solenoid Valve
(R) for electric actuation must be veri-
fied at least quarterly as follows:
Step 1. Close the System Main Control
Valve (B).
Step 2. Open the Main Drain Valve (D).
Step 3. Test the deluge releasing panel
in accordance with the manufacturer's
instructions to energize the Solenoid
Valve (R).
Step 4. Verify that there is a flow of
water from the Solenoid Valve (R) drain
connection.
Step 5. Verify that the Diaphragm
Chamber pressure has decreased
to below 25% of the water supply
pressure.
Step 6. Reset the electric detection
system in accordance with the manu-
facturer's instructions to de-energize
the Solenoid Valve (R), and proceed as
follows:
• Water should cease draining from the
Solenoid Valve (R) but remain drain-
ing from the Manual Reset Actuator
(N).
• Press the Reset Knob on the Man-
ual Reset Actuator (N) and hold it a
few seconds until water stops flow-
ing from its drain tube.
• Pressure will then build up in the
DV-5 Diaphragm Chamber.
A
• After system pressure is restored
in the DV-5
inspect the Solenoid Valve (R) and
Manual Reset Actuator (N) for leaks
at the drain tube. Any leaks must be
Valve
a
corrected before proceeding to the
next step.
Step 7. Partially open the System Main
Control Valve (B). Slowly close the Main
Drain Valve (D) as soon as water dis-
charges 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. If there are no leaks, the
DV-5 Valve is ready to be placed in
A
service and the System Main Control
Valve (B) must then be fully opened.
Solenoid Valve and
Dry Pilot Actuator Test Procedure
Proper operation of the Solenoid Valve
(S) and Dry Pilot Actuator (T) must be
verified at least quarterly as follows:
Step 1. Close the System Main Control
Valve (B).
Step 2. Open the Main Drain Valve (D).
Diaphragm Chamber,
A