Instruction manual

ManualsBrandsReliable ManualsHome building and DecorSingle Interlock Preaction System

16.

Shut down the valve controlling water supply to

the Deluge Valve. Relieve the inlet pressure by

opening the 1¼” drain valve B (Fig. 6). Close the

valve A (Fig. 6) that supplies water to the push rod

chamber, and open the Model B Manual Emer-

gency Station, valve D (Fig. 6).

Remove the trim at the unions nearest to the push

rod chamber cover (#3, Fig. 5).

Take the push rod chamber cover (#3, Fig. 5) off

by removing the six retaining screws (#26, Fig.

5).

CONDITION ONE (Water coming out of the

bleed hole):

Water coming out of the bleed hole is caused by a

leaking diaphragm (#18, Fig. 5). Visually inspect

the push rod chamber cover (#3, Fig. 5) and pis-

ton (#17, Fig. 5) to determine what could have

damaged the diaphragm and correct. Install a

new diaphragm. NOTE: The diaphragm has two

different surfaces, it is not bi-directional. It will fail

if installed backwards! Roll the diaphragm so that

the smooth surface (the pressure side) conforms

to the inside of the push rod chamber cover and

reassemble the six retaining screws (#26, Fig. 5)

with an installation torque of 15 foot-pounds. Set

up the Model DDX Deluge Valve as per the sec-

tion “Resetting the Single Interlock Preaction Sys-

tem.”

CONDITION TWO (System Air coming out of

the bleed hole):

System air coming out of the bleed hole is caused

by a defective O-ring assembled to the push rod

guide (#11, Fig. 5). Remove the piston-push rod

subassembly, push rod spring (#34, Fig. 5), and

push rod guide (#11, Fig. 5). Verify by hand turn-

ing, that the push rod cannot be unscrewed from

the piston. Replace all O-rings and the push rod

guide (#21 & #22, Fig. 5). The correct installation

torque for the push rod guide is 35 inch-pounds.

CAUTION: Do not over tighten the push rod

guide. Reassemble the components that were ini-

tially removed. Re-install the diaphragm (#18, Fig.

5) if it appears to be in good shape, otherwise,

replace it also. NOTE: The diaphragm has two dif-

ferent surfaces. It is not bi-directional. It will fail if

installed backwards! Roll the diaphragm so that