Water Flow Pressure Switches (Ps-10) - Viking ESFR Technical Data Manual

March 7, 2008 Page 31
ESFR PRE-PRIMED SINGLE
TECHNICAL DATA INTERLOCK PREACTION
COLD STORAGE SYSTEM
The Viking Corporation, 210 N Industrial Park Road, Hastings MI 49058
Telephone: 269-945-9501 Technical Services 877-384-5464 Fax: 269-945-4495 Email: techsvcs@vikingcorp.com
NOTES: An alarm test connection is provided on the deluge valve trim. When testing the alarm,
the downstream isolation valve (illustrated in Figure 30) and antifreeze isolation valve (illus-
trated in Figure 33) 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 posi-
tion and open the antifreeze supply valve.
A. Water Flow Pressure Switches (PS-10)
Each system requires 2 water flow pressure switches that transmit an alarm after the system
has activated.
The Double Switch (PS-10-2A) Water Flow Pressure Switch (Switch #1) is installed on the
deluge valve conventional trim. In addition to transmitting an alarm signal, Switch #1 is wired
in conjunction with digital Switch #5 to prevent the solenoid valve on the CS-1 Tank and Pump
Unit from opening when the water flow switch is activated. This prevents propylene glycol from
entering the system when water is flowing.
The Single Switch (PS-10-1A) Water Flow Pressure Switch (Switch #2) is installed on the del-
uge valve conventional trim. Switch #2 is wired in conjunction with Digital Pressure Switch #4
in order to prevent the operation of the APCS during system operation.