Reliable DH56 HSW-PL 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 Rev. C
Bulletin 015 Rev. C
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.(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
Plated Corrosion Resistant Sprinklers
*Concealed Sprinkler is not corrosion resistance
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 ex-
posed thermal element with the concealed ver-
sion.
11. Push-on/thread-off sturdy convenient escutch-
eon for recessed and cover for concealed.
12. Factory assembled sprinkler & cup, shipped
complete with protective cap 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 finishes.
(1) See Figure 4.
Approval Organizations
1. Listed by Underwriters Laboratories Inc. and
UL certified 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 fac-
tory mounted and is shipped with a protective cap that
protects the 3mm frangible glass bulb during shipping
and post installation finishing operations. The DH56 can
be combined in the field 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 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 standard response sprin-
klers 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 fire pro-
tection in long and narrow spaces such as hallways, corri-
dors, 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 (1):
K Factor
Thread
Size
Temperature
Rating Maximum
Ambient
Temperature
Sprinkler
Identifica-
tion
Number
(SIN)
US Met-
ric Sprinkler SWC Cover
56 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)
(1) Minimum spacing of 14 feet (4,3m).
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.
Maintenance
Model DH56 should be inspected and the sprinkler main-
tained 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. Re-
move any sprinkler/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 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 dam-
age 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 re-
cessed sprinkler cut a 2 5/8” diameter hole in the wall as
shown in Figure1. Remove temporarily the plastic protec-
tive cap, then use the GFR2 wrench to tighten the sprin-
kler until secured in the sprinkler fitting. NOTE: The GFR2
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 be-
fore installing in the fitting. When inserting or removing the
wrench from the sprinkler cup, care must be taken to pre-
vent 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 pro-
tected during plastering and painting operations by rein-
stalling 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 es-
cutcheon against the wall.
DH56 Recessed, F2 Escutcheon
To install the DH56 with the F2 Escutcheon as a re-
cessed sprinkler cut a 2 ¼” diameter hole in the wall as
shown in Figure 2. Thread the DH80 into the collar hand
tight. Apply a PTFE based sealant to the sprinkler threads
and install in the fitting. Wrench only on the square boss.
NOTE: The GFR2 wrench has a notch in it to accommo-
date the deflector top. This wrench can only be inserted
one way. When inserting or removing 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 painting 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 Escutcheon 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 Figure1. A PTFE based thread sealant
should be applied to the sprinkler threads only. Remove
the protective cap (P/N 6802710003) and then position
the GFR2 wrench into the sprinkler/cup assembly until
the wrench engages the flats of the square boss. Then
tighten the sprinkler into the pipe fitting. When inserting
or removing the wrench from the sprinkler/cup assembly,
care should be taken to prevent damage to the sprin-
kler. 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 specific sprinklers. The use of any other concealed
cover/cup assembly with the Model DH56 Horizontal Side-
wall Sprinkler or the use of the concealed cover assembly
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 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 protec-
tors before this time may leave the bulb vulnerable to dam-
age. 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.
Model DH56 Quick Response
Extended Coverage Horizontal
Sidewall 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 PTFE
coated Belleville spring washer and machined brass cup with
3 mm glass bulb containing no plastic parts. Installation shall
permit sprinkler deflectors to be positioned 4” (102mm) to 12”
(305mm) below the ceiling. Sprinklers shall have a nominal K-
factor of 5.6 (80), and 1/2” NPT thread. Sprinkler temperature
rating shall be [155°F (68° C)][200°F (93°C)]. Rated working
pressure shall be 250 psi (17.2 bar). Standard finish: [white]
[chrome][bronze][Special finish– specify]. Quick response
horizontal sidewall sprinklers shall be Reliable Model DH56,
SIN RA1564 (Bulletin 015).
For recessed horizontal sidewall sprinklers: Replace “hori-
zontal 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]; or (2)
Recessed escutcheon assembly shall be a two-piece “friction
fit” escutcheon with ½” adjustment. Standard finish: [white]
[chrome][bright brass][Special finish– specify]. Quick re-
sponse recessed horizontal sidewall sprinklers shall be Reli-
able Model DH56, SIN RA1564 (Bulletin 015).
For concealed 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) sprinkler and 165°F (74°C) for 200°F (93°C)
sprinkler. A plastic protective cap shall be provided and fac-
tory installed inside the sprinkler cup to protect the sprinkler
from damage, which could occur during construction before
the cover plate is installed. Standard cover plate finish: [white]
[Custom Color– specify]. Quick response concealed hori-
zontal sidewall sprinklers shall be Reliable Model DH56, SIN
RA1564 (Bulletin 015).
UL Listing Category
Sprinklers, Automatic and
Open.
Quick Response Sprinklers.
Installation Wrench
Model GFR2 Sprinkler
Wrench
Note: A leak tight ½” NPT
(R1/2) sprinkler joint can
be obtained with a torque
of 8-18 ft-lbs (10.8-24.4
N-m). Do not tighten
sprinklers over maximum
recommended torque. It
may cause leakage or
impairment of the sprin-
klers.
Installation Aid
For concealed, a protec-
tive plastic cap is included
for use during installation.
Escutcheon Data:
FP cup/escutcheon
assembly - 1/2” (13mm)
adjustment
F2 - 1/2” (13mm) adjust-
ment
Ordering Information
Specify:
• DH56
- Sprinkler Finish
• DH56 Recessed
-Sprinkler Finish
• FP or F2 Escutcheon
-Escutcheon Finish
• SWC Concealed
-Cover-Plate Finish
• Protective cap for use
with F2 escutcheons
Finishes (1)
Standard Finishes (1)
Sprinkler FP Escutcheon F2 Escutcheon Cover Plate
White or Black
Polyester (2)
Chrome
Bronze
White
Chrome
White
Chrome
Bright Brass
White
Special Application Finishes
Sprinkler F2/ FP Escutcheons
Electroless Nickel
PTFE(2)
Electroless Nickel
PTFE
(1) Other colors and finishes are available. Consult factory for details.
(2) cULus listed Corrosion Resistant.
Note: Paint or any other coatings applied over the factory finish will
void all approvals and warranties.
Figure 1.

Figure 4.
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. 01/18 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 90 years.
Figure 2.
Figure 3.