Downstream System Isolation Valve - Viking ESFR Technical Data Manual

March 7, 2008
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
A. Installation
The wiring diagram shown in Figure 39 should be used for installation of the switches and
solenoid valve. In order to wire the pressure switches and solenoid valve to the power supply,
a NEMA 4 junction box and conduit components are required from the junction box to sole-
noid valve. A special cable included with the package is required for connection to the digital
switch.
The electric power supply required is 115-220 VAC, 50 or 60 Hz GFI protected. The supply
wire from digital switch to solenoi valve shall be wired through the non-interupted N.C. alarm
pressure swtich. See Figure 39 diagram.

9. Downstream System Isolation Valve

The downstream System Isolation Valve allows the user to isolate the propylene glycol in the
system during system maintenance and testing procedures. If this valve is not installed, the
propylene glycol solution will be entirely drained from the system even in situations where such
drainage may not be desirable. The valve must be supervised in accordance with NFPA 13.
TECHNICAL DATA
Figure 30 - Downstream System Isolation Valve
ESFR PRE-PRIMED SINGLE
INTERLOCK PREACTION
COLD STORAGE SYSTEM
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