Reliable DH56 Bulletin

For coverages up to 28 feet wide and
10 feet long . 250 psi (17,2 bar) rated.
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Features:
1. Coverage for long and narrow spaces such as
hallways, corridors, decks and rooms up to 28
feet wide and 10 feet long.
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.
See Figure 4.
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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
The Reliable Automatic Sprinkler Co., Inc., 103 Fairview Park Drive, Elmsford, New York 10523
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Model DH56
Model DH56 Recessed
Model DH56 Concealed
Quick Response,
Extended Coverage Sprinkler
DH56
DH56 Concealed
with SWC coverplate
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.
Bulletin 015 C
Rev.
DH56 FP Recessed
DH56 F2 Recessed