Reliable DH56 Dry User manual

Reliable Automatic Sprinkler Co., Inc., 103 Fairview Park Drive, Elmsford, New York 10523
Model DH56 Dry (SIN RA1664)
K5.6 (80 metric)
Extended Coverage
Horizontal Sidewall Sprinkler
Bulletin 016 February 2021
Bulletin 016 February 2021
For coverages up to 28 feet wide and 10
feet long(1). 250 psi (17,2 bar) rated.
Features:
1. Coverage for long and narrow spaces such as hallways, cor-
ridors, decks and rooms up to 28 feet wide and 10 feet long.
(1)
2. Deflector to ceiling dimensions are:
4” (102mm) min. to 12” (305mm) max.
3. Minimum spacing between sprinklers 16 feet (4.9m).(1)
4. Polyester Coated or Electroless Nickel PTFE Plated Corro-
sion Resistant Sprinklers.
*Concealed Sprinkler is not corrosion resistant.
5. UL Listed for extended coverage, light hazard applications.
6. 5.6 K Factor.
7. Sprinkler is approved for
250 psi (17,2 bar) applications.
8. Quick response performance.
9. ½” (13mm) adjustment of escutcheon and cover.
10. Concealed cover plate can prevent the sprinkler from being used
for unintended purposes. No exposed thermal element with the
concealed version.
11. Push-on/thread-off sturdy convenient escutcheon for recessed
and cover for concealed.
12. Factory assembled sprinkler & cup, shipped complete with
bulb protector for concealed and FP recessed versions.
13. Sprinkler & cup assembly and escutcheon or cover are sep-
arately packaged.
14. Available in a variety of plated and painted nishes
(1) See Fig. 10.
Approval Organizations
• Listed by Underwriters Laboratories Inc. and
UL certied for Canada (cULus)
Patents
US Patent No. 7,841,418
Products Description
The Model DH56 are quick response extended coverage
sidewall dry sprinklers for use in light hazard applications. 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 dur-
ing shipping and post installation nishing operations. The DH56
can be combined in the eld with the FP Escutcheon to make a
recessed dry sprinkler. The SWC cover plate and FP recessed
escutcheons have ½” adjustment. The SWC cover plate is at-
DH56 HSW Concealed
with SWC cover plate
DH56 HSW
DH56 HSW FP Recessed
DH56 HSW/HB
tached with 135 & 165 degree solder. In the event of a re 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 en-
ables the sprinkler to apply water to a re sooner than standard
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 and outside buildings.
See Fig. 8 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 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 internal portion of the drop
nipple. The wax must not be removed.
Application
The Model DH56 is a horizontal sidewall dry sprinkler intend-
ed 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, cor-
ridors, 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
Reliable Model DH56 dry sidewall sprinklers may be installed
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 DH56 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.
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 F3R instal-
lation wrench (see Fig. 3) on the square boss to tighten the
sprinkler until it is secured in the sprinkler tting1. Apply a PTFE
based sealant to the sprinkler threads before installing in 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/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 F3R
installation wrench (see Fig. 3) on the square boss to tighten
the sprinkler until it is secured in the sprinkler tting1. Apply a
PTFE based sealant to the sprinkler threads before installing in
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 protective
cap, and then use the Model XLO2 wrench1(see Fig. 2) to
tighten the sprinkler until it is secured in the sprinkler tting.
Note: The Model XLO2 wrench has a notch in it to accom-
modate the deflector top. This wrench can only be inserted
one way. Care must be taken not to damage the deflector
during tightening. Apply a PTFE based sealant to the sprinkler
threads before installing in the sprinkler. It is recommended
that the sprinkler be protected during plastering and painting
operations by reinstalling the plastic protective cap. Installation
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 cover-
plate as a concealed sprinkler, cut a 21/8” diameter hole into the
wall as shown in Fig. 7. Temporarily remove the plastic protec-
tive cap, and then use the Model XLO2 wrench1(see Fig. 2)
to tighten the sprinkler until it is secured in the sprinkler tting.
Note: The Model XLO2 wrench has a notch in it to accommo-
date the deflector top. This wrench can only be inserted one
way. Care must be taken not to damage the deflector during
tightening. Apply a PTFE based sealant to the sprinkler threads
before installing in the sprinkler. It is recommended that the
sprinkler be protected during plastering and painting opera-
tions by reinstalling the plastic protective cap. Installation is
completed by removing the protective cap and inserting the
coverplate. Coverplate assemblies provide ½” (13mm) of ad-
justment. 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-clock-
wise direction.
Concealed coverplate assemblies are listed only for use with
specic sprinklers. The use of any other concealed wall sprin-
kler or the use of the SWC coverplate on any sprinkler with
which it is not specically listed will void all guarantees, warran-
ties, listings and approvals.
Note: DH56 and DH56 Recessed Sprinklers have orange
bulb protectors to minimize bulb damage during shipping, han-
dling, and installation. REMOVE THIS PROTECTION AT THE
TIME THE SPRINKLER SYSTEM IS PLACED IN SERVICE FOR
FIRE PROTECTION. Removal 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. RE-
MOVE PROTECTORS BY UNDOING THE CLASP BY HAND.
DO NOT USE TOOLS TO REMOVE THE PROTECTORS.
1Installation Wrenches:
Throughout this technical bulletin, Reliable has specied specic installation wrenches for use on each version of our sprinklers. A pipe wrench may also be used
to install a dry sprinkler provided that it only interfaces with the steel outer tube of the assembly (Item #8 on g 10). 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’s removal at a later date.

3.
Step 3
Step 2
Step 1
Fig. 2 - XLO2 Wrench
Fig. 3 - F3R Wrench
Maintenance
Model DH56 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 using a soft brush
or gentle vacuuming. Remove 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 re-
placement of damaged or operated sprinklers. Prior to instal-
lation, 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 Specication
Sprinklers shall be a [quick response – cULus Listed] extended
coverage horizontal sidewall sprinkler for light hazard occupan-
cies. 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. Wa-
ter seal assembly shall consist of a PTFE coated Belleville spring
washer. Installation shall permit sprinkler deflectors to be posi-
tioned 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 nish: [white][chrome][bronze][Special nish– specify].
Quick response extended coverage horizontal sidewall dry sprin-
klers shall be Reliable Model DH56, SIN RA1664 (Bulletin 016).
For recessed EC horizontal sidewall sprinklers: Replace “hori-
zontal sidewall” with “recessed horizontal sidewall.” Add: (1)
Recessed escutcheon assembly shall be a two-piece escutch-
eon of push-on and thread off design with ½” (13mm) adjust-
ment. Standard nish 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 “hori-
zontal 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 adjustment. 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 nish: [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
Identication
Number
(SIN)
US Met-
ric 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.

4.
Fig. 4
Fig. 5

5.
Fig. 7
Fig. 6

Fig. 8
5.

6.
Fig. 9

Ordering Information
Specify:
1. 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
2. Sprinkler Temperature Rating.
3. Sprinkler Finish.
4. Cover Plate/Escutcheon Finish.
5. Length: “A” Dimension (face of tee to face of ceiling or
wall) in 1
/
4” (6mm) increments.
Notes:
1. The “A” dimension is based on a nominally gauged pipe thread
“make-up” of 0.600” (15mm) per ANSI B2.1 [7½ threads ap-
proximately].
2. All platings and paintings are decorative and intended for inte-
rior use.
Installation Wrench
Model XLO2 Sprinkler Wrench (Recessed & Concealed)
Model F3R Sprinkler Wrench
Note: Throughout this technical bulletin, Reliable has specied specic instal-
lation wrenches for use on each version of our sprinklers. A pipe wrench may
also be used to install a dry sprinkler provided that it only interferes with the steel
outer tube of the assembly (item #8 on g 16). 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.
Finishes
Fig. 10
8.
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 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.
Products manufactured and distributed by Reliable have been protecting life and property for over 90 years.