TECHNICAL DATA
May 28, 2013
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: 269-945-9501 Technical services: 877-384-5464 Fax: 269-818-1680 Email: [email protected]
Preaction 325h
4” MoDEL G-4000P PrEACTIoN
wITH ELECTrIC rELEAsE
Figure 7b - Fire Condition - Double Interlock system
B. Fire Condition (Double Interlock system):
In a �ire condition, o�eration o� the detection system activates the �irst initiating circuit in the release control �anel, causing an
alarm to activate. When a s�rinkler o�erates, air �ressure esca�es �rom the s�rinkler �i�ing. The air su�ervisory switch activates
the second initiating circuit in release control �anel. When BOTH initiating circuits have been activated, the release control �anel
energizes solenoid valve o�en. With the solenoid valve o�en, �rime water is drained �rom the �rime chamber, causing the Model
G-4000P �alve to o�en, �illing the s�rinkler �i�ing with water. Water �rom the intermediate chamber o� the G-4000P �alve �res-
surizes the sensing end o� the POR�, causing the POR� to o�en. The o�en POR� �revents water �ressure �rom building in the
�rime chamber should the solenoid close.
