2. Close the softener/filter inlet control valve
8
. All of the water
will now flow through the PRV and not through the domestic
water softener/filtration system
9
.
3. Now that the water softener/filtration system
9
is isolated,
open a single plumbing fixture downstream of the PRV. The
pressure gauge
6
will show a pressure drop downstream of
the PRV. The pressure gauge
6
reading will continue to drop
until it reaches the point at which the PRV is preset.
4. If the flowing pressure on the pressure gauge
6
is lower or
higher than the pressure indicated on the bypass detail in the
set pressure box
13
, turn the adjusting nut on the PRV until
the pressure gauge
6
reading matches the pressure on the
bypass detail. DO NOT adjust the PRV so that the downstream
pressure is lower than that shown on the bypass detail. Doing
so will cause the sprinkler system to fail.
5. Open the softener/filter inlet control valve
8
. The pressure
gauge
6
reading will increase. The water is now flowing
through the water softener/filtration system
9
only. If a
sprinkler activates, the downstream pressure will drop below
the PRV set point and water will flow through the PRV
4
,
thus introducing hard or unfiltered water into the system.
6. Turn off all domestic fixtures and perform the fire sprinkler flow
test. If the PRV
4
has been set correctly, the flow test should
be successful.
7. After the flow test is completed, open multiple outlets
downstream of the PRV
4
. Make note of how many outlets
can be flowing before the pressure is equal to or below the
PRV set pressure. Inform the customer that they will be able
to flow a specified number of outlets simultaneously. If the
customer exceeds that number of flowing fixtures, the system
will receive hard or unfiltered water.
Troubleshooting
Hard or unfiltered water issues
1. The customer is exceeding the maximum amount of plumbing
fixtures they can have flowing simultaneously. Inform them
they can also test the system by repeating step 7 in the
installation guidelines.
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