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The sprinkler uses a fast-response thermal element and is
available with a temperature rating of 155°F (68°C), 175°F
(79°C), or 200°F (93°C). Model SWC cover plates include a
conical concealed cover plate that is attached to a skirt with
temperature sensitive solder. Operation of the Model SWC
cover plate occurs when the solder melts due to an increase
in the surrounding temperature, allowing the cover plate to
fall away and exposing the Model DH80 Dry sprinkler. Model
SWC cover plates are available with a Temperature Rating
of either 135°F (57°C) for use with Ordinary Temperature
Classification [155°F (68°C)] sprinklers or 165°F for use with
Intermediate Temperature Classification [175°F (79°C) and
200°F (93°C)] sprinklers.
Model DH80 dry sprinklers have a special wax fillet placed
in the gap between the cup that supports the bulb and the
wrenching boss. This wax will not interfere with the operation
of the sprinkler, and it prevents contaminants from entering
the internal portion of the drop nipple. The wax must not be
removed.
Application
The Model DH80 Dry sprinkler is a horizontal sidewall dry
sprinkler intended for installation in light hazard occupan-
cies in accordance with NFPA 13. These sprinklers are de-
signed to provide fire protection in long and narrow spaces
such as hallways, corridors, decks and portions of rooms
up to 28 feet (8.5 m) wide and 14 feet (4.3 m) long. They
are rated for 175 psi (12 bar) and can be mounted between
4 and 12 inches (102 and 305 mm) down from the ceiling.
Model DH80 Dry sprinklers may be installed on wet-pipe
sprinkler systems in accordance with Fig. 1, as well as dry-
pipe and preaction sprinkler systems.
Technical Data:
Nominal
Temperature
K-Factor
Rating
Thread
Size
US Metric
Sprinkler
155°F
(68°C)
1" NPT
or
175°F
8.0
115
ISO
(79°C)
7-1R1
200°F
(93°C)
Required Minimum Flow Rate and Pressure
Maximum Coverage
Area Width x Length
ft x ft (m x m)
28 x 14 (8.5 x 4.3)
Installation Instructions
Model DH80 Dry sprinklers must only be installed in the
following fittings:
(1.) the side outlet of an ANSI B 16.3 class 150 malleable iron
pipe tee
(2.) the side outlet of an ANSI B 16.4 class 125 cast iron pipe tee
(3.) the side outlet of a Spears Manufacturing Company Model
4202-010 or Model 4202-010SR Listed CPVC sprinkler tee
(4.) the side outlet of any Listed CPVC sprinkler tee only
Sprinkler
Maximum
Identification
Ambient
Number
SWC
Temperature
(SIN)
Cover
135°F
100°F
(57°C)
(38°C)
165°F
150°F
RA5532
(74°C)
(66°C)
165°F
150°F
(74°C)
(66°C)
Pressure
Flow Rate
psi (bar)
gpm (L/min)
40 (151)
25 (1.7)
in accordance with Fig. 8 and upon verification that
the CPVC sprinkler tee does not interfere with the
sprinkler's inlet.
Model DH80 Dry sprinklers shall not be installed into el-
bows, welded outlets, or gasket sealed outlets. In all installa-
tions, including into CPVC piping, the dry sprinkler shall be
installed with protrusion into the fitting in accordance with the
installation diagrams in this Bulletin.
Installation of the Model DH80 Dry sprinkler is not recom-
mend in copper pipe systems, as this may reduce the life
expectancy of the sprinkler. Do not install Model DH80 Dry
sprinklers with the standard (long) inlet fitting into CPVC fit-
tings that have an internal obstruction (see Fig. 8); this will
damage the sprinkler, the fitting, or both. Model DH80 Dry
sprinklers are available with a short "PL" inlet fitting for instal-
lation on CPVC fittings of wet pipe sprinkler systems only.
Model DH80 Dry sprinklers connected to wet-pipe systems
must be installed with the Exposed Minimum Barrel Length
required by Fig. 1 located in a Heated Area.
A clip is provided to protect the glass bulb thermal ele-
ment from damage. The clip is factory installed on the sprin-
kler. The clip should remain in place during installation of
the sprinkler and be removed when the sprinkler system is
placed in service. Model DH80 Dry sprinklers with the Model
FP recessed escutcheon or the Model SWC cover plate are
also supplied with a cap that can be used to provide addi-
tional protection for the sprinkler during painting or finishing.
The cap can be installed without removing the clip. Both the
cap and the clip must be removed when the sprinkler sys-
tem is placed in service.
Use the following steps for installation:
1. The centerline of the Model DH80 Dry sprinkler must be
installed between 4-5/8" (118 mm) and 12-5/8" (321 mm)
vertically below the finished ceiling so that the top of the
deflector is not less than 4" (102 mm) or more than 12"
(305 mm) from the finished ceiling. A hole must be cut
in the wall directly in-line with the outlet of the tee. See
the Installation Data table for the recommended hole di-
ameter based on the escutcheon or cover plate option
selected.
2. Apply pipe joint compound or Polytetrafluoroethylene
(PTFE) tape to the threads of the sprinkler's inlet fitting.
3. Install the sprinkler in the tee using the installation wrench
specified in the Installation Data table. The Model F3 and
Model F3R wrenches are designed to be inserted into
the groves in the sprinkler's wrench boss as shown in Fig.
3. The Model XLO2 wrench is designed to fit into the cup
and engage the wrench boss as shown in Fig. 2. Do NOT
wrench any part of the sprinkler assembly other than the
wrench boss. When inserting or removing the wrench
from the sprinkler, care should be taken to prevent dam-
age to the sprinkler. The sprinkler is then tightened into
the pipe fitting to achieve a leak free connection. The rec-
ommended minimum to maximum installation torque is
22-30 lb-ft (30 – 40 N-m).
3a. Alternatively, where access to the outer tube of the sprin-
kler is available, the Model DH80 Dry sprinkler may be
installed using a pipe wrench. The pipe wrench shall only
be permitted to interface with the steel outer tube portion
2.
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