outlet of a Central Figure 730 Mechani-
cal Tee.
NOTE
Do not install the Series DS-2 into any
other type fitting without first consult-
ing the Technical Services Depart-
ment. Failure to use the appropriate
fitting may result in: failure of the sprin-
kler to properly operate due to forma-
tion of ice over the inlet Plug or binding
of the inlet Plug; or, insufficient en-
gagement of the inlet pipe threads with
consequent leakage.
Branch, cross, and feedmain piping
connected to Dry Sprinklers and sub-
ject to freezing temperatures must be
pitched for drainage in accordance
with the minimum requirements of the
National Fire Protection Association
for dry pipe sprinkler systems.
When Dry Sprinklers are to be used in
wet pipe sprinkler systems protecting
areas subject to freezing temperatures
(e.g., sprinkler drops into freezers),
consideration must be given to the ap-
propriate length of the sprinkler that
will prevent freezing of the water in the
connecting pipes due to conduction.
When the temperature surrounding
the wet pipe sprinkler system is main-
tained at a minimum temperature of
40°F/4°C, the following are the mini-
mum recommended lengths between
the face of the sprinkler fitting and the
outside surface of the protected area
(i.e., length exposed to minimum am-
bient of 40°F/4°C):
•
12 inches (300 mm) when the tem-
perature within the protected area
is -20°F/-29°C
•
18 inches (450 mm) when the tem-
perature within the protected area
is -40°F/-40°C
•
24 inches (600 mm) when the tem-
perature within the protected area
is -60°F/-51°C
For protected area temperatures be-
tween those given above, the mini-
mum recommended length from the
face of the fitting to the outside of the
protected area may be determined by
interpolating between the indicated
values.
NOTE
When Dry Sprinklers penetrate a ceil-
ing or wall into an area subject to freez-
ing, the clearance space around the
Sprinkler Casing must be completely
sealed in order to prevent the leakage
of moist air into the freezing area
which might result in the formation of
condensate around the Frame, Deflec-
tor, Bulb Seat, or Bulb. Failure to pre-
vent the formation of condensate
could result in the build-up of ice
around the releasing components.
This could result in the inadvertent op-
eration of the sprinkler or impaired op-
eration due to reduced thermal sensi-
tivity.
Installation
The Series DS-2 Dry Type Sprinklers
must be installed in accordance with
the following instructions:
NOTES
The Series DS-2 must only be installed
in fittings that meet the requirements
of the Design Criteria section.
Refer to the Design Criteria section for
other important requirements regard-
ing piping design and sealing of the
clearance space around the Sprinkler
Casing.
Do not install any bulb type sprinkler if
the bulb is cracked or there is a loss of
liquid from the bulb. With the sprinkler
held horizontally, a small air bubble
should be present. The diameter of the
air bubble is approximately 1/16 inch
(1,6 mm) for the 135°F/57°C rating to
1/8 inch (3,2 mm) for the 286°F/141°C
rating.
A leak tight 1 inch NPT sprinkler joint
should be obtained with a torque of 20
to 30 ft.lbs. (26,8 to 40,2 Nm). Higher
levels of torque may distort the sprin-
kler inlet with consequent leakage or
impairment of the sprinkler.
Do not attempt to compensate for in-
sufficient adjustment in an Escutcheon
Plate by under- or over-tightening the
Sprinkler. Readjust the position of the
sprinkler fitting to suit.
Step 1.
Pendent sprinklers must be
installed only in the pendent position.
The deflector of a pendent sprinkler is
to be parallel to the ceiling.
Step 2.
With pipe thread sealant ap-
plied to the inlet threads, hand tighten
Page 4 of 6
TFP530
FIGURE 4
TY5255 STANDARD RESPONSE or TY5235 QUICK RESPONSE
SERIES DS-2 DRY PENDENT w/ EXTENDED ESCUTCHEON
ADJUSTMENT
WILL PERMIT
ESCUTCHEON
±1-3/8" (34,9 mm)
ADJUSTMENT
WILL PERMIT
ESCUTCHEON
±5/8" (15,9 mm)
9/16"
(14,3 mm)
NOMINAL
MAKE-IN:
1" NPT,
FACE OF
FITTING
SPRINKLER
FACE OF
CEILING
(REFER TO DESIGN
SPRINKLER FITTING
CRITERIA SECTION)
4-13/16±1/8" (122,2±3,2 mm)
4-1/16±1/8" (103,2±3,2 mm)
FOR ORDER LENGTHS
< 3-1/4" (82,6 mm):
> 3-1/4" (82,6 mm):
FOR ORDER LENGTHS
-or-
2-3/4" DIA.
(69,9 mm)
*
**
(92,1 mm)
3-5/8" DIA.
*
**
ORDER LENGTHS:
INCREMENTS
IN 1/4" (6,4 mm)
(0,0 to 1149,4 mm)
0" to 45-1/4"
FIGURE 5
W-TYPE 17 SPRINKLER WRENCH
RECESS
WRENCH
WITH SPRINKLER
ENGAGEMENT
IN TO ENSURE
WRENCHING AREA
PUSH WRENCH
AREA
WRENCHING
SPRINKLER
OBSOLETE
