Reliable DH56 HSW User manual

The Reliable Automatic Sprinkler Co., Inc., 103 Fairview Park Drive, Elmsford, New York 10523
Model DH56 HSW
Model DH56 HSW Recessed
Model DH56 HSW Concealed
Quick Response,
Extended Coverage Dry Sprinklers
Bulletin 016 Rev. E
Bulletin 016 Rev. E
For coverages up to 28 feet wide and
10 feet long(1). 250 psi (17,2 bar) rated.
Features:
Coverage for long and narrow spaces such as hallways,
corridors, decks and rooms up to 28 feet wide and 10
feet long.(1)
Deflector to ceiling dimensions are:
4” (102mm) min. to 12” (305mm) max.
Minimum spacing between sprinklers 13 feet (4m).(1)
Polyester Coated Corrosion Resistant Sprinklers (cULus)
UL Listed for extended coverage, light hazard applications.
5.6 K Factor.
Sprinkler is approved for
250 psi (17,2 bar) applications.
Quick response performance.
½” (13mm) adjustment of escutcheon and cover.
Concealed cover plate can prevent the sprinkler from being
used for unintended purposes. No exposed thermal element
with the concealed version.
Push-on/thread-off sturdy convenient escutcheon for recessed
and cover for concealed.
Factory assembled sprinkler & cup, shipped complete with
bulb protector for concealed and FP recessed versions.
Sprinkler & cup assembly and escutcheon or cover are
separately packaged.
Cover finishes available in standard white paint, special
bronze, black paint or flat white paint.
(1) See Fig. 9.
Approval Organizations
Listed by Underwriters Laboratories Inc. and
UL certified for Canada (cULus)
NYC MEA 258-93-E
Patents
US Patent No. 7,841,418
Other Patents Pending
Products Description
The Model DH56 are quick response extended cover-
age sidewall dry sprinklers for use in light hazard applica-
tions. The Model DH56 dry sprinkler with SWC cover plate
is a concealed sprinkler that uses Reliable’s push on/thread
off sidewall cover. This sprinkler has the cup factory mounted
and is shipped with a bulb protector that protects the 3mm
frangible glass bulb during shipping and post installation fin-
ishing operations. The DH56 can be combined in the field
with the FP or F2 Escutcheon to make a recessed dry sprin-
kler. The SWC cover plate, FP and F2 recessed escutcheons
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
1.
2.
DH56 HSW Concealed
with SWC coverplate (See Fig. 7)
DH56 HSW (See Fig. 4)
DH56 HSW FP Recessed (See Fig. 6)
DH56 HSW/HB (See Fig. 5)
have ½” adjustment. The SWC cover plate is attached with
135 & 165 degree solder. In the event of a fire the rising
ambient temperature melts the solder and the cover plate is
ejected away by springs exposing the 3mm frangible glass
bulb. The use of a 3mm bulb allows quick response which
enables the sprinkler to apply water to a fire sooner than stan-
dard response sprinklers of the same temperature rating.
Model DH56 dry sprinklers are intended for use in dry and
preaction systems to protect areas subjected to freezing tem-
peratures and unheated portions inside buildings. See Fig. 1
for guidelines on using dry sprinklers in wet systems.

2.
Environments wherein dry sprinklers are employed can
be corrosive. For this reason, Model DH56 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 DH56 is a horizontal sidewall dry sprinkler
intended for installation in light hazard occupancies in ac-
cordance with NFPA 13. These sprinklers are designed to
provide fire protection in long and narrow spaces such as
hallways, corridors, decks and rooms up to 28 feet (8,5m)
wide and 10 feet (3m) long. They are rated for 250 psi (17,2
bar) and can be mounted between 4 and 12 inches (102
and 305mm) down from the ceiling.
General Installation Instructions
Model DH56 dry sprinklers must be installed only in stan-
dard (ANSI B 16.3 class 150 and ANSI B 16.4 class 125)
pipe tees in the horizontal position, even at branch line ends.
They should not be installed into elbows or pipe couplings
located on drop nipples to the sprinklers. For these and
other fittings including CPVC, the dry sprinkler should be
installed into a fitting to allow protrusion into the fitting in ac-
cordance with the diagrams. The “A” dimension of the dry
sprinkler, which extends into a freezing zone from wet pipe
systems, should be selected to provide, as a minimum, the
specified lengths in inches shown in Fig. 1.
Caution:
Do not install Model DH56 HSW Dry sprinklers into CPVC
adapter fittings or tees that have an internal obstruction.
This will damage the sprinkler and /or the fitting. Refer to
Fig. 8
DH56 HSW
To install the DH56 HSW dry sprinkler cut a 21/8” diameter
hole in the wall as shown in Fig. 4. Use the Model G3 instal-
lation wrench (see Fig. 3) to tighten the sprinkler until it is
secured in the sprinkler fitting. Apply a Teflon* based seal-
ant to the sprinkler threads before installing in the sprinkler.
Wrench only on the square boss. DO NOT WRENCH ON
ANY OTHER PART OF THE SPRINKLER. Installation is com-
pleted by removing the orange glass bulb-protector and as-
sembling the slip-on escutcheon to the sprinkler’s can.
DH56 HSW/HB
To install the DH56 HSW/HB dry sprinkler cut a 2½” diam-
eter hole in the wall as shown in Fig. 5. Use the Model G3
installation wrench (see Fig. 3) to tighten the sprinkler until
it is secured in the sprinkler fitting. Apply a Teflon* based
sealant to the sprinkler threads before installing in the sprin-
kler. Wrench only on the square boss. DO NOT WRENCH
ON ANY OTHER PART OF THE SPRINKLER. Installation is
completed by removing the orange glass bulb-protector
and assembling the slip-on escutcheon to the sprinkler’s
can.
DH56 HSW Recessed with FP Escutcheon
To install the DH56 HSW dry sprinkler with the FP Escutch-
eon as a recessed sprinkler cut a 25/8” diameter hole in the
wall as shown in Fig. 6. Temporarily remove the plastic pro-
tective cap, and then use the Model XLO2 wrench (see Fig.
2) to tighten the sprinkler until it is secured in the sprinkler
fitting. Note: The Model XLO2 wrench has a notch in it to
accommodate the deflector top. This wrench can only be
inserted one way. Care must be taken not to damage the
deflector during tightening. Apply a Teflon** based seal-
ant to the sprinkler threads before installing in the sprinkler.
Wrench only on the square boss. DO NOT WRENCH ON
ANY OTHER PART OF THE SPRINKLER. It is recommended
that the sprinkler be protected during plastering and paint-
ing operations by reinstalling the plastic protective cap. In-
stallation is completed by removing the protective cap and
inserting the push-on escutcheon. Turn clockwise to adjust
the escutcheon against the wall.
DH56 HSW Concealed with SWC Cover Plate
To install the DH56 HSW dry sprinkler with the SWC
coverplate as a concealed sprinkler, cut a 21/8” diam-
eter hole into the wall as shown in Fig. 7. Temporari-
ly remove the plastic protective cap, and then use the
Model XLO2 wrench (see Fig. 2) to tighten the sprinkler
until it is secured in the sprinkler fitting. Note: The Model
XLO2 wrench has a notch in it to accommodate the de-
flector top. This wrench can only be inserted one way.
Care must be taken not to damage the deflector during
tightening. Apply a Teflon** based sealant to the sprinkler
threads before installing in the sprinkler. Wrench only on
the square boss. DO NOT WRENCH ON ANY OTHER
PART OF THE SPRINKLER. It is recommended that the
sprinkler be protected during plastering and painting op-
erations by reinstalling the plastic protective cap. Instal-
lation is completed by removing the protective cap and
inserting the coverplate. Coverplate assemblies provide
½” (13mm) of adjustment. Final adjustment is made by
turning the coverplate clockwise until the skirt flange
makes full contact with the wall surface. Cover removal
requires turning in the counter-clockwise direction.
Concealed coverplate assemblies are listed only for
use with specific sprinklers. The use of any other con-
cealed wall sprinkler or the use of the SWC coverplate
on any sprinkler with which it is not specifically listed will
void all guarantees, warranties, listings and approvals.
Note: DH56 and DH56 Recessed Sprinklers have or-
ange bulb protectors to minimize bulb damage during
shipping, handling, and installation. REMOVE THIS PRO-
TECTION AT THE TIME THE SPRINKLER SYSTEM IS
PLACED IN SERVICE FOR FIRE PROTECTION. Remov-
al of the protectors before this time may leave the bulb
vulnerable to damage. RASCO wrenches are designed
to install sprinklers when covers are in place. REMOVE
PROTECTORS BY UNDOING THE CLASP BY HAND. DO
NOT USE TOOLS TO REMOVE THE PROTECTORS.
*DuPont Registered Trademark

Fig. 1
3.

4.
Step 3
Step 2
Step 1
Fig. 2 - XLO2 Wrench
Fig. 3 - G3 Wrench
Maintenance
Model DH56 Quick Response Dry Sprinklers should be
inspected quarterly and the sprinkler system maintained in
accordance with NFPA 25. Do not remove the factory ap-
plied thermally sensitive wax fillet between the bulb support-
ing 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 using a soft brush or gentle vacuuming. Re-
move any sprinkler which has been painted (other than factory
applied) or damaged in any way. A stock of spare sprinklers
should be maintained to allow quick replacement of dam-
aged 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 DH56 Quick Response
Extended Coverage Horizontal
Sidewall Dry Sprinkler Specification
Sprinklers shall be a [quick response – cULus Listed] ex-
tended coverage horizontal sidewall sprinkler for light hazard
occupancies. Sprinklers to be of bronze frame construction
with a special deflector capable of providing a discharge over
a coverage area of 28 ft. (8,5m) wide, and 10 ft. (3m) long
horizontal throw. Water seal assembly shall consist of a Teflon-
coated Belleville spring washer. Installation shall permit sprin-
kler deflectors to be positioned 4“ (102mm) to 12” (305mm)
below the ceiling. Sprinklers shall have a nominal K-factor
of 5.6 (80), and 1” NPT thread. Sprinkler temperature rating
shall be [155°F (68° C)] and [200°F (93°C)]. Rated working
pressure shall be 250 psi (17.2 bar). Standard finish: [whit
e][chrome][bronze][Special finish– specify]. Quick response
extended coverage horizontal sidewall dry sprinklers shall be
Reliable Model DH56, SIN RA1664 (Bulletin 016).
For recessed EC horizontal sidewall sprinklers: Replace
“horizontal sidewall” with “recessed horizontal sidewall.” Add:
(1) Recessed escutcheon assembly shall be a two-piece es-
cutcheon of push-on and thread off design with ½” (13mm)
adjustment. Standard finish shall be chrome, white and brass.
Quick response recessed horizontal sidewall sprinklers shall
be Reliable Model DH56, SIN RA1664 (Bulletin 016).
For concealed EC horizontal sidewall sprinklers: Replace
“horizontal sidewall” with “concealed horizontal sidewall.”
Add: Cover plate assembly shall consist of a brass cover
plate and copper alloy retainer flange. Method of attaching
the cover plate to the sprinkler cup shall be a push-on and
thread-off design allowing a ½” (13mm) cover plate adjust-
ment. Cover plate temperature rating shall be 135°F (57°C)
for 155°F (68°C) dry sprinkler and 165°F (74°C) for 200°F
(93°C) dry sprinkler. A bulb protector shall be provided and
factory installed inside the sprinkler cup to protect the glass
bulb from damage, which could occur during construction
before the cover plate is installed. Standard cover plate finish:
[white] [Custom Color– specify]. Quick response extended
coverage concealed horizontal sidewall dry sprinklers shall
be Reliable Model DH56, SIN RA1664 (Bulletin 016).
Technical Data:
K Factor Thread
Size
Temperature
Rating Maximum
Ambient
Temperature
Sprinkler
Identification
Number
(SIN)
US Metric Sprinkler SWC
Cover
5.6 80 1”
155°F
(68°C)
135°F
(57°C)
100°F
(38°C)
RA1664
175°F
(79°C)
165°F
(74°C)
150°F
(66°C)
200°F
(93°C)
165°F
(74°C)
150°F
(66°C)
Coverage Area
Maximum Coverage
Area Width x Length
ft x ft (m x m)
Flow Rate
gpm (L/min)
Pressure
psi (bar)
28 x 8 (8,5 x 2,4) 23 (87,1) 16.9 (1,2)
28 x 10 (8,5 x 3) 28 (106) 25 (1,7)
Approval Type:
Quick Response, Extended Coverage.
Approved for installation in accordance with NFPA 13
for light hazard occupancies.
•
•

5.
Available "A" Dim. is 2" to 48" (51mm to 1219mm) in 1/4" (6mm) increments
Note: The Sprinkler Can protrudes ¼” when escutcheon is in nominal position. Escutcheon adjustment provides
- ¼” (-6mm) to +1¼” (+32mm) “A” dimension adjustment range.
Fig. 4
Note: The Sprinkler Can protrudes 1¼” when escutcheon is in nominal position. Escutcheon adjustment pro-
vides - ½” (-12.7mm) to +½” (+12.7mm) “A” dimension adjustment range.
Fig. 5

6.
Fig. 7
Available "A" Dim. is 3-1/2" to 48" (89mm to 1219mm) in 1/4" (6mm) increments
Available "A" Dim. is 3-1/2" to 48" (89mm to 1219mm) in 1/4" (6mm) increments
Note: Do not install the Model DH56 Dry EC Horizontal Recessed Sidewall Sprinkler in walls which have positive
pressure in their side space.
Fig. 6

7.
Fig. 8

The Reliable Automatic Sprinkler Co., Inc.
[phone] Sales Offices
[phone] Sales Fax
[phone] Corporate Offices
www.reliablesprinkler.com Internet Address
Manufactured by
Recycled
Paper
Revision lines indicate updated or new data.
EG. Printed in U.S.A 02/11 P/N 9999970308
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.
Productsmanufactured and distributed by Reliable have been protecting life and property for over 90 years, and are installed and serviced by the most highly
qualified and reputable sprinkler contractors located throughout the United States, Canada and foreign countries.
Ordering Information
Specify:
Sprinkler Type (select one):
(a) Model DH56 Dry EC HSW
(b) Model DH56 Dry EC HSW/HB
(c) Model DH56 Dry Recessed EC HSW/FP
(d) Model DH56 Dry Concealed EC HSW
Sprinkler Temperature Rating.
Sprinkler Finish.
Cover Plate/Escutcheon Finish.
Length: “A” Dimension (face of tee to face of ceiling or
wall) in 1
/
4” (6mm) increments.
Notes:
The “A” dimension is based on a nominally gauged pipe
thread “make-up” of 0.600” (15mm) per ANSI B2.1 [7½
threads approximately].
All platings and paintings are decorative and intended for
interior use.
UL Listing Category
Sprinklers, Automatic and Open.
Quick Response Sprinklers.
1.
2.
3.
4.
5.
1.
2.
Installation Wrench
Model XLO2 Sprinkler Wrench (Recessed & Concealed)
Model G3 Sprinkler Wrench
Note: A leak tight 1” NPT sprinkler joint can be obtained
with a torque of 20-30 ft-lbs (27.1 - 40.7 N-m). Do not
tighten sprinklers over maximum recommended torque.
It may cause leakage or impairment of the sprinklers.
Escutcheon Data:
FP cup/escutcheon assembly - ½” (13mm) adjustment
Finishes (1)
Standard Finishes (1)
Sprinkler Escutcheon Cover Plate
White Polyester (2)
/Chrome/ Bronze
Brass (3)
White/Chrome White
(1) Other colors and finishes are available. Consult factory for details.
(2) cULus Listed as Corrosion Resistant Sprinkler in standard Black or
White.
(3) Not available for HB escutcheons.
Note: Paint or any other coatings applied over the factory finish will void
all approvals and warranties.
Fig. 9