Technical data

Page 102
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Road, Hastings MI 49058
Telephone: [phone] Technical Services 877-384-5464 Fax: [phone] Email: [e-mail]
ESFR PRE-PRIMED SINGLE
INTERLOCK PREACTION
COLD STORAGE SYSTEM
March 7, 2008
VI. SYSTEM INSPECTIONS, TESTS AND MAINTENANCE
1. Solution Test Valves
Multiple propylene glycol/water solution test valves are to be installed on the system piping for semi-
annual testing with a refractometer to detect the concentration of antifreeze solution and effectiveness
against freezing. When draining sample antifreeze solution from the system, be sure to shut off the
system control valve directly upstream of the deluge valve so that water doesn’t enter the system.
Sampling shall be taken from multiple points within the freezer system. The testing stated in this sec-
tion is more restrictive than the required test frequency indicated in NFPA 25. Solution test valves
should be located in several areas of the system piping as follows:
The most practical location immediately downstream of the primary Easy Riser
®
Check
Valve.
The most remote location from the Easy Riser
®
Check Valve.
One valve located at the end of 50% of the line piping directly on the AV-1 Air/Vent Valve as-
sembly.
A test valve shall be located at the end of the nearest line on the tree system and the last line
on the tree system.
If the propylene glycol/water solution becomes diluted or does not pass the refractometer test, the
entire system is to be drained; all sections of trapped piping are to be drained. Five percent (5%) of
the pendent ESFR sprinklers are to be removed and inspected for frozen solution. If any of the pen-
dent ESFR sprinklers are found with frozen solution, then all the pendent ESFR sprinklers are to be
removed and replaced with new Viking K25.2 Pendent ESFR VK510 Sprinklers prior to re-charging
the system with new 35% or 50% premix propylene glycol/water solution. If the 5% of removed sprin-
klers are not damaged, they can be re-installed in the system. (Refer to the system service schedule
for additional solution tests.)
Ensure that the CS-1 pump antifreeze supply control system is returned to the fully pressurized state
once fluid sampling is completed. After the CS-1 pump has restored the antifreeze solution pressure,
ensure that the water supply control valve is returned to the fully open position once fluid sampling
is completed.
2. Alarm Test Connection
An alarm test connection is provided on the deluge valve trim. When testing the alarm, the down-
stream isolation valve and antifreeze isolation valve must be shut before opening the test valve.
This is a precaution in case the deluge valve would inadvertently operate due to problems in the
trim components and cause water to enter the system causing possible contamination of antifreeze.
After testing of the alarm, restore the control valves to their normal operating position and open the
antifreeze supply valve.
3. Flow Test Valve
Annual flow tests are required for every sprinkler system. When performing annual water flow tests
for the ESFR Pre-Primed Single Interlocked Preaction Cold Storage System, you will utilize the main
drain of the isolation check valve. This will allow the primary check valve clapper to open also. First,
close the supervised system isolation valve downstream of the isolation check valve. Close the anti-
freeze inlet ball valve.
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