Reliable DH56 HSW-PL User manual

Sprinkler Model
Max. Working
Pressure
psi (bar)
Maximum Coverage Area
Width x Length
ft x ft (m x m)
Flow Rate
gpm (L/min)
Pressure
psi (bar)
Sprinkler
Identication
Number (SIN)
DH56 Dry EC 250 (17.2)
28 x 8 (8.5 x 2.4) 23 (87.1) 16.9 (1.2)
RA1664
28 x 10 (8.5 x 3) 28 (106) 25 (1.7)
Table A
DH56 Dry EC HSW with standard escutcheon
Features
• Coverage for long and narrow light hazard spaces such as
hallways, decks, and rooms
• Coverage area up to 28 ft (8.5m) long and 10 ft (3m) deep
• Available in four trim styles and a variety of nish combina-
tions.
Product Description
The Reliable Model DH56 Dry Extended Coverage Horizontal
Sidewall Sprinkler is a quick-response sprinkler utilizing a
sensitive 3mm glass bulb thermal element listed for use in light
hazard applications.
Dry sprinklers are intended for use on wet, dry, and preaction
systems to protect indoor and outdoor areas that are subject
to freezing. When used on wet systems, it is important that a
minimum exposed length of barrel inside the face of the wall or
insulation is provided to offset conduction of potentially freezing
temperatures from the unconditioned (sprinkler) end along the
barrel. See Figure 6 for guidelines on using dry sprinklers on wet
systems.
Environments where dry sprinklers are employed are often
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 prevents
contaminants from entering the internal portion of the drop nipple
and must not be removed.
www.reliablesprinkler.com
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) deep. Model
DH56 sprinklers are rated for 250 psi (17.2 bar) and can be
mounted between 4 and 12 inches (102 and 305mm) down from
the ceiling.
cULus Listed
Model DH56 Dry Extended Coverage
Horizontal Sidewall Sprinkler
Bulletin 016 March 2022

Model DH56 EC HSW Coverage Area Figure 1
Model DH56 EC Horizontal Sidewall Sprinkler SIN RA1664
Technical Specications
Style:
Extended Coverage
Horizontal Sidewall
Threads: 1” NPT or ISO7-1R1
Nominal K-Factor: 5.6 (80)
Max. Working Pressure: 250 psi (17.2 bar)
Max. Spacing: 28 ft (8.5m)
Min. Spacing: 16 ft (4.9m)
Material Specications
Inlet Fitting: Brass Alloy
Flip Disk: Brass Alloy
Seal: PTFE Coated Belleville Spring
Outer Tube: Galvanized Steel Pipe
Sprinkler Frame: Brass Alloy
Bulb Insert: Copper Alloy
Thermal Element: Glass Bulb
Deflector: Bronze Alloy
Load Screw: Brass Alloy
Sprinkler Finishes
See nish combination tables on
following pages
Sensitivity
Quick Response
Temperature Ratings
155°F (68°C)
175°F (79°C)
200°F (93°C)
Recessed Escutcheons/Cover Plates
Standard Escutcheon
HB Escutcheon
FP Escutcheon
SWC Cover Plate
Listings and Approvals
cULus Listed for Light Hazard
28' [8.5m] Maximum Spacing
16' [4.9m] Minimum Spacing
MODEL DH56
DRY SPRINKLER
4" [100mm] Min. from Ceiling
12" [300mm] Max. from Ceiling
Wall
Floor
Coverage
Area
DH56DRYCOVAREA
28' [8.5m]
8' [2.4m] or 10' [3m]
Based on Selected
Discharge Flow and
Pressure
Shown here with standard escutcheon.
See pages 3-6 for additional trim styles
Bulletin 016
March 2022
Page 2 of 10
www.reliablesprinkler.com

Model DH56 Dry Sprinkler with Standard Escutcheon Figure 2
System Tee
3" Dia.
[76mm]
Nominal Position
of Escutcheon
Wall
Inlet Fitting
1" [25mm]
Escutcheon
Adjustment
1-15/16""
[53mm]
Ceiling
"A" Dimension
1/2" [12mm]
Escutcheon Adjustment
Sprinkler Can
2-1/8" Dia.
[54mm]
Hole in Wall
016STD-A
4" [100mm] Min.
12" [300mm] Max.
DH56 DRY HSW SPRINKLER, STANDARD ESCUTCHEON
1/2" [12mm] Nominal
Protrusion
5/8" [16mm]
1/2" [12mm]
"A" Dimension = 2" to 48" (50mm to 1200mm)
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.
“A” Dimension: 2” to 48” (50mm to 1200mm) in 1/4” (6mm) increments
Bulletin 016
March 2022
Page 3 of 10
www.reliablesprinkler.com

“A” Dimension: 3-1/2” to 36” (90mm to 900mm) in 1/4” (6mm) increments
Bulletin 016
March 2022
Page 4 of 10
www.reliablesprinkler.com
Model DH56 Dry Sprinkler with HB Escutcheon Figure 3
System Tee
3-1/2"
[89 mm]
Dia.
Nominal Escutcheon Position
1/2" [13 mm]
Escutcheon Adjustment
"A" Dimension
2 1/2" Dia.
[64 mm]
Hole in Wall
1/2" [13 mm]
Escutcheon
Adjustment
1-15/16""
[49mm]
5/8" [16 mm]
Sprinkler Can
Inlet Fitting
Escutcheon
1-1/4" [32mm] Nominal
Projection
1-1/4"
[32mm]
Wall
Ceiling
016HB
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.

“A” Dimension: 3-1/2” to 48” (90mm to1200mm) in 1/4” (6mm) increments
Bulletin 016
March 2022
Page 5 of 10
www.reliablesprinkler.com
Model DH56 Dry Sprinkler with FP Escutcheon Figure 4
Hole in Wall
3-1/4"
[82mm]
2 5/8" Dia.
[67mm]
"A" Dimension
System Tee
Wall
4" [102mm] Min.
12" [305mm] Max.
Ceiling
Sprinkler Cup
Escutcheon
Inlet Fitting
1/4" [6mm]
1/4" [6mm]
Escutcheon Adjustment
Escutcheon Adjustment
1 1/4"
[32mm]
Nom
Nominal Position of
Escutcheon
5/8" [16mm]
016FP
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.
Note: Do not install the Model DH56 Dry Sprinkler with FP recessed escutcheon in locations where there is positive pressure in the
cavity behind the sprinkler relative to the pressure at the sprinkler.