Reliable DH80 Dry User manual

Reliable Automatic Sprinkler Co., Inc., 103 Fairview Park Drive, Elmsford, New York 10523
Model DH80 Dry (SIN RA5532)
K8.0 (115 metric)
Extended Coverage
Horizontal Sidewall Sprinkler
Bulletin 055 February 2021
Bulletin 055 February 2021
Coverage up to 28 feet wide and 14 feet long(1).
Features:
1. cULus Listed as Quick-response for Light Hazard applica-
tions only.
2. Available with a Standard, Model HB (extended), or Model
FP (recessed) escutcheon, as well as the Model SWC (con-
cealed) cover plate.
3. Sprinkler available in lengths up to 36” (900 mm) in 1/4” (6
mm) increments (see Fig. 4-7).
4. Listed deflector to ceiling distance of 4” (102 mm) min. to
12” (305 mm) max.
5. Minimum spacing between sprinklers of 14 feet (4.3 m).
6. Sprinkler available in white or black polyester, chrome, and
bronze standard nishes as well as custom color polyester
and Electroless Nickel PTFE (ENT) special application n-
ishes.
7. White polyester, black polyester, and ENT nish sprinklers
are cULus Listed as Corrosion Resistant (not applicable to
concealed sprinklers).
(1) See Fig. 9.
Approval Organizations
1. Listed by Underwriters Laboratories Inc. and
UL certied for Canada (cULus) as a quick-response extend-
ed coverage sprinkler for Light Hazard occupancies.
Patents
US Patent No. 7,841,418
Products Description
The Model DH80 Dry sprinkler is a quick-response extended
coverage horizontal sidewall sprinkler for use in Light Hazard
applications. The sprinkler has a nominal K-Factor of 8.0 (115
metric). The sprinkler is designed with a spray pattern that is
cULus Listed to provide a coverage of 28 feet (8.5 m) along
the wall where the sprinkler is installed and projecting 14 feet
(4.3 m) from the wall where the sprinkler is installed, as shown
in Fig. 9.
The Model DH80 Dry sprinkler is available with a standard es-
cutcheon (Fig. 4), a Model HB extended escutcheon (Fig. 5), a
Model FP recessed escutcheon (Fig. 6), or a Model SWC cover
plate (Fig. 7). The can or cup, used to mount the escutcheon or
cover plate, is factory installed. The Model FP escutcheon and
Model SWC cover plate are the only recessed escutcheon and
cover plate, respectively, listed for use with the Model DH80
Dry sprinkler.
Model DH80 Dry sprinklers are available in nominal lengths
up to 36” (900 mm). Dimensional information for Model DH80
Dry sprinklers is provided in Figures 4 through 7, depending on
the escutcheon or cover plate option selected.
The sealing washer in the Model DH80 Dry sprinkler is locat-
Model DH80 Dry sprinkler with Model SWC cover plate
Model DH80 Dry sprinkler with Standard escutcheon
Model DH80 Dry sprinkler with Model FP recessed escutcheon
Model DH80 Dry sprinkler with Model HB escutcheon
ed at the inlet end of the sprinkler assembly. The position of the
sealing washer is controlled by a fluid-lled glass bulb thermal
element at the opposite end of the sprinkler assembly. When in-
stalled on a wet-pipe sprinkler system in accordance with Fig. 8,
the Model DH80 sprinkler is installed with the thermal element
in a protected space that may be subject to freezing tempera-
tures and the inlet orice located in a heated area that is sep-
arated from the protected space. Model DH80 sprinkler may
also be installed on dry-pipe and preaction sprinkler systems.
Operation of the sprinkler’s thermal element allows the sealing
washer to move out of the inlet orice admitting water from the
supply piping. Material Specications for the Model DH80 Dry
sprinkler are provided in Fig. 11.

2.
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 cov-
er 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 Classication [155°F
(68°C)] sprinklers or 165°F for use with Intermediate Tempera-
ture Classication [175°F (79°C) and 200°F (93°C)] sprinklers.
Model DH80 dry sprinklers have a special wax llet 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 in-
ternal 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 occupancies
in accordance with NFPA 13. These sprinklers are designed
to provide re 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 ac-
cordance with Fig. 8, as well as dry-pipe and preaction sprin-
kler systems.
Technical Data:
Nominal
K-Factor Thread
Size
Temperature
Rating Maximum
Ambient
Temperature
Sprinkler
Identication
Number
(SIN)
US Met-
ric Sprinkler SWC Cover
8.0 115
1” NPT
or
ISO
7-1R1
155°F
(68°C)
135°F
(57°C)
100°F
(38°C)
RA5532
175°F
(79°C)
165°F
(74°C)
150°F
(66°C)
200°F
(93°C)
165°F
(74°C)
150°F
(66°C)
Required Minimum Flow Rate and Pressure
Maximum Coverage
Area Width x Length
ft x ft (m x m)
Flow Rate
gpm (L/min)
Pressure
psi (bar)
28 x 14 (8.5 x 4.3) 40 (151) 25 (1.7)
Installation Instructions
Reliable Model DH80 dry sidewall sprinklers may be in-
stalled in ductile or malleable cast iron threaded tees, or CPVC
tees and adapters upon verication that the sprinkler inlet tting
does not interfere with the interior of the tting (see Figure 9).
DO NOT install Reliable Model DH80 dry sidewall sprinklers
into elbows or couplings, welded outlets, mechanical tees, or
gasket sealed CPVC ttings.
Dry sprinklers connected to wet pipe systems must be in-
stalled as indicated in Figure 8 and as required by NFPA 13 with
the Exposed Minimum Barrel Length located in a heated area.
A clip is provided to protect the glass bulb thermal element
from damage. The clip is factory installed on the sprinkler. 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 es-
cutcheon or the Model SWC cover plate are also supplied with
a cap that can be used to provide additional protection for the
sprinkler during painting or nishing. The cap can be installed
without removing the clip. Both the cap and the clip must be
removed when the sprinkler system 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 nished ceiling so that the top of the de-
flector is not less than 4“ (102 mm) or more than 12” (305
mm) from the nished 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 diameter 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 tting.
3. Install the sprinkler in the tee using the installation wrench
specied in the Installation Data table. The Model F3R
wrench is 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 t 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 damage to the sprinkler. The
sprinkler is then tightened into the pipe tting to achieve a
leak free connection. The recommended minimum to maxi-
mum installation torque is 22-30 lb-ft (30 – 40 N-m).
3a. Alternatively, where access to the outer tube of the sprinkler
is available, the Model DH80 Dry sprinkler may be installed
using a pipe wrench. The pipe wrench shall only be per-
mitted to interface with the steel outer tube portion of the
sprinkler (Item #8 in Fig. 10). Do NOT wrench any other por-
tion of the sprinkler assembly. A pipe wrench can install the
sprinkler into the tting with a large amount of torque; con-
sideration should be given to the need for future removal of
the sprinkler because the installation torque will have to be
matched or exceeded to remove the sprinkler. The recom-
mended minimum to maximum installation torque is 22-30
lb-ft (30 – 40 N-m).

3.
Step 3
Step 2
Step 1
Fig. 2 - Model XLO2 Wrench
Fig. 3 - Model F3R wrench
Maintenance
Model DH80 Quick-Response Dry Sprinklers should be in-
spected and the sprinkler system maintained in accordance with
NFPA 25. Do not remove the factory applied thermally sensitive
wax llet between the bulb supporting cup and the wrenching
boss. Do not replace this wax with a substitute substance. An
alternate substance may interfere with proper operation of the
sprinkler. Do not clean sprinklers with soap and water, ammonia
or any other cleaning fluids. Remove dust by gentle vacuuming.
Replace any sprinkler which has been painted (other than fac-
tory applied) or damaged in any way. A stock of spare sprinklers
should be maintained to allow quick replacement of damaged
or operated sprinklers. Prior to installation, sprinklers should be
maintained in their original cartons and packaging until used to
minimize the potential for damage to sprinklers that would cause
improper operation or non-operation.
Model DH80 Dry Quick-Response
Extended Coverage Horizontal
Sidewall Sprinkler Specication
Sprinklers shall be cULus Listed quick-response extended cov-
erage horizontal sidewall sprinklers for light hazard occupancies.
Sprinklers to be of bronze frame construction with a special de-
flector capable of providing a discharge over a coverage area
of 28 ft. (8.5 m) wide, and 14 ft. (4.3 m) long horizontal throw.
Sprinklers shall have [standard escutcheons][extended escutch-
eons][recessed escutcheons][conical concealed cover plates]
produced by the manufacturer of the sprinklers and cULus Listed
for use with the sprinklers. Water seal assembly shall consist of
a PTFE coated Belleville spring washer. Sprinklers should be cU-
Lus Listed to permit deflectors to be positioned 4“ (102 mm) to
12” (305 mm) below the ceiling. Sprinklers shall have a nominal
K-Factor of 8.0 (115 metric), and [1” NPT][ISO 7-1R1] threads.
Sprinkler temperature rating shall be [155°F (68°C)][175°F
(79°C)][200°F (93°C)]. Rated working pressure shall be 175 psi
(12 bar). Sprinkler and escutcheon nish shall be [white poly-
ester][black polyester][chrome][bronze/brass][Special Applica-
tion - Note: Specify based on Finishes table]. [Conical concealed
cover plate nish shall be [white paint][Special Application - Note:
Specify based on Finishes table].] [Sprinklers shall be cULus List-
ed as Corrosion Resistant (Note: available with white polyester,
black polyester, and ENT nishes only) (Note: not available with
sprinklers using the Model SWC cover plate)]. Quick-response
extended coverage horizontal sidewall dry sprinklers shall be Re-
liable Model DH80 Dry, SIN RA5532 (Bulletin 055).
4. Standard and Model HB escutcheons can be installed by
slipping the escutcheon over the can until the escutcheon
is seated against the wall. The Model FP escutcheon is
installed by pressing or threading the escutcheon into the
cup by hand; the escutcheon can be tightened against the
wall by turning the escutcheon in a clockwise direction and
removed by turning the escutcheon in a counter-clockwise
direction. To install the Model SWC cover plate, rst remove
the protective cap, if installed, and clip. Install the Model
SWC cover plate on the sprinkler by pressing or threading
the cover plate into the cup by hand; the cover plate can
be tightened against the wall by turning the cover plate in a
clockwise direction and removed by turning the cover plate
in a counter-clockwise direction. The Model FP recessed
escutcheon and Model SWC cover plate are the only re-
cessed escutcheon and cover plate, respectively, listed for
use with the Model DH80 Dry sprinkler; the use of any other
recessed escutcheon or cover plate with the Model DH80
Dry sprinkler will void all guarantees, warranties, listings and
approvals.
5. Remove the protective cap, if installed, and clip when plac-
ing the sprinkler system in service.
Installation Data:
Escutcheon or
Cover Plate Option
Recommended
Hole Diameter
Installation
Wrench
Standard escutcheon 2-1/8” (54 mm) F3R
HB extended escutcheon 2-1/2” (64 mm) F3R
FP recessed escutcheon 2-5/8” (67 mm) XLO2
SWC cover plate 2-1/8” (54 mm) XLO2

4.
Fig. 4
Fig. 5

5.
Fig. 7
Fig. 6

Fig. 8
6.

7.
Fig. 9

Ordering Information
Specify:
1. Sprinkler: Model DH80 Dry
2. Escutcheon/Cover Plate Model: [Standard escutcheon]
[Model HB extended escutcheon][Model FP recessed es-
cutcheon][Model SWC cover plate]
3. Sprinkler Temperature Rating: [155°F (68°C)][175°F
(79°C)][200°F (93°C)]
4. Sprinkler threads: [1” NPT][ISO7-1R1]
5. Sprinkler inlet: [Standard][Short “PL” - wet-pipe installation
only]
6. Sprinkler/Escutcheon Finish: See Finishes table
7. Cover Plate Finish (where applicable): See Finishes table
8. Length: “A” Dimension (face of tee to nished face of wall
in 1/4” (6 mm) increments up to a maximum of 36” (900
mm)- See Fig. 4-7)
Note: The “A” dimension is based on a nominally gauged
pipe thread “make-up” of 0.600” (15 mm) per ANSI B2.1
(approx. 7-1/2 threads).
Installation Wrench
Model XLO2 Sprinkler Wrench (Recessed & Concealed)
Model F3R Sprinkler Wrench
Note: A pipe wrench may also be used to install a dry sprinkler provided that it
only engages the steel outer tube of the assembly (item #08 on g 11). Keep in
mind that a pipe wrench will incorporate a large amount of torque into the nal
assembly. This torque will have to be matched or exceeded upon the sprinkler
removal at a later date.
Fig. 10
8.
Finishes
Standard Finishes
Sprinkler Standard
Escutcheon
HB Escutch-
eon
FP Re-
cessed
Escutcheon
Cover Plate
White Poyes-
ter*
White Poly-
ester White Paint White Paint
White Paint
Chrome Chrome Chrome Chrome
Bronze Brass -- --
Standard Finishes
Sprinkler Standard
Escutcheon
HB Escutch-
eon
FP Re-
cessed
Escutcheon
Cover Plate
Black Poly-
ester*
Black Poly-
ester Black Paint Black Poly- ester
Custom
Color Paint,
Black Plated,
Chrome,
Brass, Bright
Brass
Custom
Color Poly-
ester
Custom Color
Polyester
Custom Color
Paint
Customer
Color Poly-
ester
Black Plated Black Plated -- Black Plated
Electroless
Nickel PTFE
(ENT)*
Type 316
Stainless
Steel
Type 316
Stainless
Steel
--
Chrome Dull Chrome Dull -- Chrome Dull
*Note: cULus Listed as a Corrosion Resistant Sprinkler, except for concealed ver-
sion.
Note: Paint or any other coating applied over the factory nish will void all approvals
and warranties.

Fig. 11
Reliable Automatic Sprinkler Co., Inc.
[phone] Sales Ofces
[phone] Sales Fax
[phone] Corporate Ofces
www.reliablesprinkler.com Internet Address
Manufactured by
Recycled
Paper
Revision lines indicate updated or new data.
EG. Printed in U.S.A. 02/21 P/N 9999970486
The equipment presented in this bulletin is to be installed in accordance with the latest published Standards of the National Fire Protection Association, Factory Mutual
Research Corporation, or other similar organizations and also with the provisions of governmental codes or ordinances whenever applicable.
Products manufactured and distributed by Reliable have been protecting life and property for almost 100 years.