Reliable DH56 HSW-PL 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 December 2021
Bulletin 016 December 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,
corridors, decks and rooms up to 28 feet wide and 10
feet long (see gure 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. White polyester, black plyester, and ENT nish sprinklers
are cULus Listed as Corrosion Resistant (not applicable
to concealed sprinklers).
5. 5.6 K Factor.
6. 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
separately packaged.
14.Available in a variety of plated and painted nishes
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 during 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
DH56 HSW Concealed
with SWC cover plate
DH56 HSW
DH56 HSW FP Recessed
DH56 HSW/HB
escutcheons have ½” adjustment. The SWC cover plate
is attached 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 enables the sprinkler to apply water
to a re sooner than standard response sprinklers of the
same temperature rating.

2.
Model DH56 dry sprinklers are intended for use in wet,
dry, and preaction systems to protect areas subjected to
freezing temperatures and unheated portions inside and
outside buildings. See Fig. 8 for guidelines on using dry
sprinklers in wet systems.
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
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 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.
Fig. 1

3.
DH56 HSW SWC Concealed 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 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 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 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 cover plate. Cover plate assemblies
provide ½” (13mm) of adjustment. Final adjustment
is made by turning the cover plate clockwise until the
skirt flange makes full contact with the wall surface.
Cover removal requires turning in the counter-clockwise
direction.
Concealed cover plate assemblies are listed only for use
with specic sprinklers. The use of any other concealed
wall sprinkler or the use of the SWC cover plate on any
sprinkler with which it is not specically listed will void all
guarantees, warranties, listings and approvals.
Notes:
1. DH56 and DH56 Recessed Sprinklers have orange
bulb protectors to minimize bulb damage during
shipping, handling, 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. REMOVE PROTECTORS
BY UNDOING THE CLASP BY HAND. DO NOT USE
TOOLS TO REMOVE THE PROTECTORS.
2. It is recommended that Reliable dry sprinklers be
installed using the wrench referenced in this bulletin.
A pipe wrench may also be used to install a dry
sprinkler provided that it only engages the steel outer
tube (pipe) of the assembly. Note that a pipe wrench
will impart a large amount of torque into the nal
assembly. This torque will need to be matched or
exceeded to remove the sprinkler at a later date.
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 installed as indicated in Figure 8 and as
required by NFPA 13 with the Exposed Minimum
Barrel Length located in a heated area.
DH56 HSW Standard Escutcheon
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 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/HB Escutcheon
To install the DH56 HSW/HB dry sprinkler cut a 2½”
diameter 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 FP Recessed Escutcheon
To install the DH56 HSW dry sprinkler with the FP
Escutcheon 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 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 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.

4.
Step 3
Step 2
Step 1
Fig. 3 - XLO2 Wrench
Fig. 2 - F3R Wrench
Maintenance
Model DH56 Quick Response Dry Sprinklers should be
inspected 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 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.
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.

5.
Fig. 4
Finish Combinations: Standard Escutcheon
Sprinkler Escutcheon(2)(3)
Bronze Polished Stainless Steel
Bronze Laquered Brass
Chrome Polished Stainless Steel
White Polyester(1) White Polyester
Black Polyester(1) Black Polyester
Custom Color Polyester(1) Custom Color Polyester
Electroless Nickel PTFE(1) Polished Stainless Steel
Notes:
1. UL Listed as Corrosion Resistant.
2. Escutcheons do not carry corrosion resistant listings.
3. Base material is 316 stainless steel.
Model DH56 Dry Sprinkler with Standard Escutcheon
“A” Dim. 2” to 48” (51mm to 1219mm) in 1/4” (6mm) increments for 1” connections

Fig. 5
6.
Finish Combinations: HB Escutcheon
Sprinkler Escutcheon(2)(3)
Bronze Chrome
Chrome Chrome
White Polyester(1) White Polyester
Black Polyester(1) Black Polyester
Custom Color Polyester(1) Custom Color Polyester
Electroless Nickel PTFE(1) Stainless Steel
Notes:
1. UL Listed as Corrosion Resistant.
2. Escutcheons do not carry corrosion resistant listings.
3. Base material is cold rolled steel unless noted.
Model DH56 Dry Sprinkler with HB Escutcheon
“A” Dim. 3-1/2” to 36” (89mm to 914mm) in 1/4” (6mm) increments for 1” connections

Fig. 6
7.
Finish Combinations: FP Recessed Escutcheon
Sprinkler(1) Escutcheon(3)(4)
Bronze Brass
Chrome Chrome
White Polyester(2) White Polyester
Black Polyester(2) Black Polyester
Custom Color Polyester(2) Custom Color Polyester
Electroless Nickel PTFE(2) Stainless Steel
Notes:
1. Cup for FP Recessed is unnished galvanized steel except
electroless nickel PTFE sprinkler uses a stainless steel cup.
2. UL Listed as Corrosion Resistant.
3. Escutcheons do not carry corrosion resistant listings.
4. Base material is cold rolled steel unless noted.
Model DH56 Dry Sprinkler with FP Escutcheon
“A” Dim. 3-1/2” to 48” (89mm to1219mm) in 1/4” (6mm) increments for 1” connections

8.
Fig. 7
Finish Combinations: SWC Concealed Cover Plate
Sprinkler(1) Cover Plate(2)
Bronze
White Polyester
Chrome Bright
Chrome Dull
Bright Brass
Unnished Bronze
Custom Color
Notes:
1. Cup for SWC Concealed is unnished galvanized steel.
2. Cover plates do not carry corrosion resistant listings.
Model DH56 Dry Sprinkler with SWC Cover Plate
“A” Dim. 3-1/2” to 48” (89mm to1219mm) in 1/4” (6mm) increments for 1” connections

Fig. 8
9.

10.
Fig. 9

11.
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. 12/21 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.
Ordering Information
Specify:
1. Sprinkler Type (select one):
Model DH56 Dry EC HSW
Model DH56 Dry EC HSW/HB
Model DH56 Dry Recessed EC HSW/FP
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.
6. Installation Wrenches:
Model XLO2 Sprinkler Wrench (Recessed & Concealed)
Model F3R Sprinkler Wrench (Standard & HB)
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 approximately].
2. All platings and paintings are decorative and intended for
interior use.