Viking ESFR Service Manual download pdf (Page 22)

Where multiple riser systems exist, the antifreeze solution system can be

supplied to multiple risers from a single pump system and the pressure

switch for each system must be controlled through the pump system

control panel. When the pressure drops below set point, a solenoid valve

supplied from the CS-1 pump shall open to allow flow of antifreeze

solution into the system(s) that are low on pressure. When pressure is

established, the solenoid valve will shut off.

Where multiple systems are supplied from a single CS-1 pump and a

single system operates due to water flow from open sprinkler, the control

panel is signaled by the alarm or flow switch of operating riser and shuts

off the supply solenoid to that riser. The remaining systems maintain

supervisory pressure. This prevents contamination of antifreeze solution

with water during operation of a single system and eliminates air pockets

that may contaminate antifreeze solution or cause pipe corrosion.

5.1.9 Propylene Glycol and Water Solution Premix

Premix 35% or 50% propylene glycol and water solution that is certified

by the manufacturer or a third-party agency is to be installed in the

system piping. Field mixing of propylene glycol and site water is

strictly prohibited, as the control of the mixture cannot be assured.

Firefighter Eliminator C 35% premix solution or Firefighter Eliminator F

50% premix solution (refer to data pages 49 a-b and 50 a-b) are required

by Viking, as they are mixed in the proper proportion and were utilized for

the research fire tests. Firefighter Eliminator C and Firefighter Eliminator

F include corrosion inhibitors and de-ionized water to prevent the

minerals in site water from reacting with the corrosion inhibitors.

This extends the usable life of the propylene glycol/water solution.

Improper field mixing of solution can result in reduced capability to

prevent freezing or to control a fire. The corrosion inhibitors included in

the premix provide corrosion control and microbiological control of the

system piping and components.

5.1.10 Riser System

The arrangement of the riser

system shall include a Viking

Model E-1 or F-1 Deluge

Valve with Conventional

Trim, Electric Release, a

primary Easy Riser

check

valve with trim for preprimed

preaction system, an

isolation Easy Riser

check

valve including cold storage

by-pass trim.

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Viking ESFR Service Manual Page 22

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