Reliable DH56 HSW-PL User manual

The Reliable Automatic Sprinkler Co., Inc., 103 Fairview Park Drive, Elmsford, New York 10523
Model DH56
Model DH56 Recessed
Model DH56 Concealed
Quick Response,
Extended Coverage Sprinkler
Bulletin 015 December 2021
Bulletin 015 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 hall-
ways, corridors, 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 14 feet
(4.3m).
4. Polyester Coated or Electroless Nickel PTFE Plat-
ed Corrosion Resistant Sprinklers
*Concealed Sprinkler is not corrosion resistant
5. UL Listed for extended coverage, light hazard ap-
plications.
6. 5.6 K Factor.
7. Sprinkler is approved for 250 psi (17,2 bar) appli-
cations.
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 ex-
posed thermal element with the concealed ver-
sion.
11. Push-on/thread-off sturdy convenient escutcheon
for recessed and cover for concealed.
12. Factory assembled sprinkler & cup, shipped com-
plete with protective cap for concealed and FP re-
cessed versions.
13. Sprinkler & cup assembly and escutcheon or cov-
er are separately packaged.
14. Available in a variety of plated and painted nishes.
(1) See Figure 4.
Approval Organizations
1. Listed by Underwriters Laboratories Inc. and
UL certied for Canada (cULus)
2. NYC MEA 258-93-E
Patents
US Patent No. 7,841,418
Other Patents Pending
DH56 FP Recessed
DH56
DH56 F2 Recessed
Products Description
The Model DH56 family of sprinklers are quick response
extended coverage sidewall sprinklers for use in light hazard
applications. The Model DH56 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 protective cap that protects the 3mm
frangible glass bulb during shipping and post installation n-
ishing operations. The DH56 can be combined in the eld
with the FP or F2 Escutcheon to make a recessed sprinkler.
The SWC cover plate, FP and F2 recessed escutcheons
have ½” adjustment. The SWC cover plate is attached with
135-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 re-
sponse sprinklers of the same temperature rating.
Application
The Model DH56 is a horizontal sidewall 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.
DH56 Concealed
with SWC coverplate

2.
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
1/2”
NPT
R1/2
155°F
(68°C)
135°F
(57°C)
100°F
(38°C)
RA1564
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)
Note: Minimum spacing between DH56 sprinklers is 14’ (4.3m).
Approval Type:
• Quick Response, Extended Coverage.
• Approved for installation in accordance with NFPA 13
for light hazard occupancies.
Maintenance
Model DH56 should be inspected and the sprinkler maintained
in accordance with NFPA 25. 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 sprin-
kler/cover assembly, 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.
Installation
DH56 Recessed, FP Escutcheon
To install the DH56 with the FP Escutcheon as a recessed
sprinkler cut a 2 5/8” diameter hole in the wall as shown in
Figure1. Remove temporarily the plastic protective cap, then
use the W4 wrench to tighten the sprinkler until secured in
the sprinkler tting. This wrench can only be inserted one
way. Care must be taken not to damage the deflector dur-
ing tightening. Apply a PTFE based sealant to the sprinkler
threads before installing in the tting. When inserting or
removing the wrench from the sprinkler cup, care must be
taken to prevent damage to 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 operations by re-
installing the protective cap P/N 6802710003. Installation is
completed by removing the protective cap and inserting the
push-on escutcheon. Turn clockwise to adjust the escutch-
eon against the wall.
DH56 Recessed, F2 Escutcheon
To install the DH56 with the F2 Escutcheon as a recessed
sprinkler cut a 2 ¼” diameter hole in the wall as shown in
Figure 2. Thread the DH56 into the collar hand tight. Ap-
ply a PTFE based sealant to the sprinkler threads and install
in the tting. Wrench only on the square boss. The W4
wrench can only be inserted one way. When inserting or re-
moving the wrench from the sprinkler cup care must be taken
to prevent damage to the sprinkler. 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 using the protective cap P/N 6999991009.
These must be ordered separately. Installation is completed
by removing the protective cap and inserting the F2 Escutch-
eon over the collar.
DH56 with SWC Cover Plate Concealed
To install the sprinkler, cut a 2 5/8” diameter hole into the wall
as shown in Figure 3. A PTFE based thread sealant should
be applied to the sprinkler threads only. Remove the protec-
tive cap (P/N 6802710003) and then position the W4 wrench
into the sprinkler/cup assembly until the wrench engages
the flats of the square boss and tighten the sprinkler into the
pipe tting. The W4 wrench can only be inserted one way.
When inserting or removing the wrench from the sprinkler/
cup assembly, care should be taken to prevent damage to
the sprinkler. DO NOT WRENCH ON ANY OTHER PART OF
THE SPRINKLER. The protective caps should be reinstalled
for protection during plastering and painting. Remove caps
only when covers are being installed. The cover assembly
is then pushed onto the cup. Cover assemblies provide ½”
(13mm) of adjustment. Final adjustment is made by turning
the cover clockwise until the skirt flange makes full contact
with the wall surface. Cover removal requires turning in the
counter- clockwise direction.
Concealed cover/cup assemblies are listed only for use with
specic sprinklers. The use of any other concealed cover/cup
assembly with the Model DH56 Horizontal Sidewall Sprinkler
or the use of the concealed cover assembly on any sprinkler
with which it is not specically listed will void all guarantees,
warranties, listings and approvals.
Note: 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 SER-
VICE 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.

3.
Figure 1. Model DH56 FP Recessed
Figure 2. Model DH56 F2 Recessed

Figure 4. Model DH56 Coverage Area
4.
Figure 3. Model DH56 SWC Concealed

The 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 9999970307
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 100 years.
UL Listing Category
Sprinklers, Automatic and Open.
Quick Response Sprinklers.
Installation Wrench
Model W2 (non-recessed, non-concealed)
Model W4 (recessed, concealed)
Note: A leak tight 1/2” NPT (R1/2) sprinkler joint can be
obtained with a torque of 8-18 ft-lbs (11-24 N.m). Do not
tighten sprinklers over maximum recommended torque as
this may cause leakage or impairment of the sprinklers.
Escutcheon Data:
FP cup/escutcheon assembly - 1/2” (13mm) adjustment
F2 recessed escutcheon - 1/2” (13mm) adjustment
Ordering Information
Specify:
• DH56
- Sprinkler Finish
• DH56 Recessed
-Sprinkler Finish
• FP or F2 Escutcheon
-Escutcheon Finish
• SWC Concealed
-Cover-Plate Finish
Finishes (1)
Standard Finishes (1)
Sprinkler FP Escutcheon F2 Escutcheon Cover Plate
White or Black
Polyester (2)
Chrome
Bronze
White
Chrome
White
Chrome
White
Chrome
Special Application Finishes
Sprinkler F2/ FP Escutcheons
Electroless Nickel PTFE(2) Stainless Steel
(1) Other colors and nishes are available. Consult factory for details.
(2) cULus listed Corrosion Resistant.
Note: Paint or any other coatings applied over the factory nish will void
all approvals and warranties.