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5.3 Taking the System Out of Service
If the system has to be taken out of service for maintenance on the system
piping, follow these instructions:
1. Close the water supply control valve to the riser being serviced.
2. Close the antifreeze supply valve to the riser being serviced.
3. If the system is being serviced, then the solution in the system can be
drained into clean containers or reclaim tank and reused as long as water
has not entered the systems. Solution should be checked at various points
while draining for proper refractometer readings to verify freeze-protection
properties.
4. Open vent/bleed valves at high points of the system or if the AV-1 Vent
Valve is applied it will automatically open.
5. Open the main drain and collect solution in clean containers or recovery tank
for re-use in system.
6. After the system is completely drained from the main drain, open any low-
point drains to remove the remaining solution from the system.
5.4 Placing the System in Service
Placing the system in service after it has been completely drained:
1. Close the main drain valve on the riser.
2. Connect the propylene glycol/water solution fill pump (NOT the CS-1 pump)
to the connection located on the main drain assembly.
3. Close the main drain valve, vent/ bleed valves, and low-point drains if
opened. Ensure there are no openings on system piping.
4. Fill system with Firefighter Eliminator C or Eliminator F propylene glycol/
water solution. While filling, periodically open the manual vent/bleed valves
or allow the Model AV-1 Vent Valve to automatically open on system piping
to ensure air is eliminated from system piping. Slow fill is recommended to
minimize the entrainment of air.
5. Fill and pressurize system piping to 50 PSI (344 kpa) minimum using the
CS-1 Pump system to provide the final set system pressure.
6. Check for trapped air by cracking open vent/bleed valves or observe the AV-
1 Vent Valve. Ensure all trapped air is eliminated from the system.
7. After system pressure is attained, the water supply control valve up stream
of the deluge valve can be opened.
6.0 AUTOMATIC PRESSURE CONTROL SYSTEM
6.1 Description
The Viking ESFR Cold Storage System is fixed
fire protection for refrigerated or cold
warehouse storage. This system is also
appropriate for unheated storage applications
in areas subject to freezing. The piping system
is a closed system filled with pressurized
propylene glycol and water solution maintained
from a pressure pump system that controls and
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