16
Draining Excess/Condensate
Water From System
Refer to Fig. 9
1. Close the main valve controlling water supply to Deluge
Valve. Also close valve A and open main drain valve B.
2. Open condensate drain valve H until all water has
drained. Close valve H.
Note:
Be sure not to keep
valve H open for an extended period of time because
that will cause enough system air to bleed off of the
system thereby causing an undesirable activation of
a trouble-annunciating device.
3. Close main drain valve B. If system contains pressurized
air, allow air pressure to come back up to specification.
Open valve A first, and then open the main valve
controlling the water supply to the Deluge Valve.
Maintenance Procedures –
Model DDX Deluge Valve
Refer to Figs. 2, 3, 7, 8 & 9.
1.
Mechanical sprinkler alarm (water motor–not
shown) not operating:
This is most likely caused by
a clogged screen in the strainer of the water motor.
Proceed as follows: Remove plug from the strainer.
Remove and clean the screen. Replace the screen and
the plug, and then tighten securely (Ref. Bulletin 613).
2.
Leakage out of the ball drip valve E (Fig. 9).
a. Water leakage due to water column in deluge
systems:
This condition can be caused by leakage past the
system side of the Model DDX Deluge Valve’s seal
assembly (#8, Fig. 7 or #5, Fig. 8). Be sure that this
surface is free of any type of debris. To eliminate
leakage due to water column in a deluge system,
refer to the section in this bulletin marked “Draining
Excess/Condensate Water From System”. If the
problem continues proceed to the following section.
b. Leakage, air or water from the ball drip valve, E
(Fig. 9):
If system air is leaking out the ball drip valve, the
problem is either damage to the airside of the Model
DDX Deluge Valve’s seal assembly (#8, Fig. 7 or #5,
Fig. 8), seat (#29, Fig. 7 or #2, Fig. 8), the upper
seat o-ring(#23, Fig. 7 or #11, Fig. 8) or, on the 8"
(200 mm) valve size only, the mounting ring o-ring
(#2, Fig. 7). If supply water is leaking out the ball drip
valve, the problem could be caused by damage to
the Model DDX Deluge Valve’s seal assembly (#8,
Fig. 7 or #5, Fig. 8), seat (#29, Fig. 7 or #2, Fig. 8),
or lower seat O-ring (#24, Fig. 7 or #11, Fig. 8). The
following section provides instructions to correct
both conditions:
A) Shut down the valve controlling the water supply
to the Deluge Valve and open the 1-
1
/
4
" main
drain valve on the 2" (50 mm), 2-
1
/
2
" (65 mm),
76 mm and 3" (80 mm) valve sizes or the 2"
main drain valve on the 4" (100 mm), 165 mm,
6" (150 mm) and 8" (200 mm) valve sizes, valve
B (Fig. 9). Open the water column drain valve
H (Fig. 9). Close the pushrod chamber supply
valve A (Fig. 9) and open the Model B Manual
Emergency Station, valve D (Fig. 9).
B) Remove the Deluge Valve’s front (handhold)
cover (#7, Fig. 7 or #4, Fig. 8) and inspect the
seat (#29, Fig. 7 or #2, Fig. 8), clapper (#6, Fig. 7
or #3, Fig. 8), and seal assembly (#8, Fig. 7 or
#5, Fig. 8) for damage. If inspection indicates
damage to the seal assembly (#8, Fig. 7 or #5,
Fig. 8), replace as follows:
For Valve Sizes: 2" (50 mm), 2‑
1
/
2
" (65 mm),
76 mm, 3" (80 mm), 8" (200 mm) and 4"
(100 mm), 6" (150 mm) & 165 mm with
Screw‑In Seat only, Refer to Fig. 2, Fig. 3
& Fig. 7:
Remove the bumpstop nuts (#10, Fig. 7) and
remove the seal assembly (#8, Fig. 7). Install
a new seal assembly (#8, Fig. 7) and thread
the bumpstop nuts (#10, Fig. 7) onto the
threaded studs of the seal assembly (#8, Fig. 7)
and tighten finger tight plus
1
/
4
to
1
/
2
turn. If
inspection indicates damage to the clapper (#6,
Fig. 7) only, then the clapper subassembly can
be removed as follows:
At the rear of the valve, disconnect the water
column drain trim section starting with the
elbow connector (#22, Fig. 2 or #21, Fig. 3).
Then remove the
1
/
4
" globe valve (#33, Fig. 2 or
#32, Fig. 3), followed by the
3
/
4
"x
1
/
4
" reducing
bushing (#53, Fig. 2 or #53, Fig. 3). Remove
the retaining ring (condensate drain side for 2"
(50 mm), 2-
1
/
2
" (65 mm), 3" (80 mm), 76 mm
and 8" (200 mm) valve sizes or hand hole
cover side for 4" (100 mm), 6" (150 mm) and
165 mm valve sizes) from the clapper hinge pin
(#30, Fig. 7) and push this pin through the hand
hole opening for 2" (50 mm), 2-
1
/
2
" (65 mm), 3"
(80 mm), 76 mm and 8" (200 mm) valve sizes
or condensate drain side for 4" (100 mm), 6"
(150 mm) and 165 mm valve sizes and remove
the clapper subassembly. Replace the seal
assembly as described previously. Inspect the
clapper (#6, Fig. 7) visually before reinstalling.
Reinstall in the reverse order making sure the
clapper spacers are in their proper position. If the
seat (#29, Fig. 7) is damaged or it is suspected
that the leakage is through the lower O-ring
(#24, Fig. 7), the seat-clapper subassembly is
easily removed as a unit as follows:
Using Reliable P/N
6881603000 Seat
Wrench for 2" (50
mm), 2-
1
/
2
" (65 mm),
76 mm and 3" (80 mm) valve sizes, Reliable
P/N
6881604000 for 4" (100
mm) valve
size, Reliable P/N 6881606000 for the 6"
(150 mm) and 165 mm valve sizes or Reliable
P/N 6881608000 Seat Wrench for 8" (200 mm)
valve size, remove the seat by unscrewing.
This will loosen the seat-clapper-mounting ring
subassembly. Reach into the valve and grasp
the seat and remove it from the valve. Then
