Reliable DH80 Manual

The Reliable Automatic Sprinkler Co., Inc., 103 Fairview Park Drive, Elmsford, New York 10523
Bulletin 003 December 2021
Bulletin 003 December 2021
Model DH80
Model DH80 Recessed
Model DH80 Concealed
Quick Response,
Extended Coverage Sprinkler
For coverages up to 28 feet wide and 14
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 14 feet long.(1)
2. Deflector to ceiling dimensions are:
4” (102mm) min. to 12” (305mm) max.
3. Minimum spacing between sprinklers 12 feet
(3,6m).
4. UL Listed for light hazard applications.
5. 8.0 K Factor.
6. Sprinkler is approved for 250 psi (17,2 bar) appli-
cations.
7. Quick response performance.
8. ½” (13mm) adjustment of escutcheon and cover.
9. Tamper resistant cover plate can prevent the sprin-
kler from being used for unintended purposes. No
exposed thermal element with the concealed ver-
sion.
10. Push-on/thread-off sturdy convenient escutcheon
for recessed and cover for concealed.
11. Factory assembled sprinkler & cup, shipped com-
plete with protective cap for concealed and FP
recessed versions.
12. Sprinkler & cup assembly and escutcheon or cov-
er are separately packaged.
13. Cover nishes available in standard white paint,
special bronze, black paint or flat white paint.
14. Polyester Coated or Electroless Nickel PTFE
Plated cULus Listed Corrosion Resistant
Sprinklers
*Concealed Sprinkler is not corrosion resistant
(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 number 6,374,919
SWC Cover Plate
US Patent Number 6, 920, 937, B2
DH80 Sprinkler
Products Description
The Model DH80 family of sprinklers are quick response ex-
tended coverage sidewall sprinklers for use in light hazard appli-
cations. The Model DH80 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 dur-
ing shipping and post installation nishing operations. The DH80
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 stan-
dard response sprinkles of the same temperature rating.
Application
The Model DH80 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 14 feet (4,3m) 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.
DH80 Concealed
with SWC cover plate DH80 F2 Recessed
DH80 DH80 Recessed

Installation
DH80 Recessed, FP Escutcheon
To install the DH80 with the FP Escutcheon as a recessed
sprinkler cut a 25 /
8” diameter hole in the wall as shown in Fig-
ure1. Remove temporarily the plastic protective cap, then use
the W4 wrench to tighten the sprinkler until secured in the sprin-
kler tting. 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 in-
stalling 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 reinstalling the protective cap P/N
6802710003. Installation is completed by removing the protec-
tive cap and inserting the push-on escutcheon. Turn clockwise
to adjust the escutcheon against the wall.
DH80 Recessed, F2 Escutcheon
To install the DH80 with the F2 Escutcheon as a recessed
sprinkler cut a 2¼” 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 tting.
Wrench only on the square boss. The W4 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 protec-
tive cap P/N 6999991009. These must be ordered separately.
Installation is completed by removing the protective cap and in-
serting the F2 Escutcheon over the collar.
DH80 with SWC Cover Plate Concealed
To install the sprinkler, cut a 25 /
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 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 insert-
ing 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 be-
ing installed. The cover assembly is then pushed onto the cup.
Cover assemblies provide ½” (13mm) of adjustment. Final ad-
justment 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 DH80 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, warran-
ties, listings and approvals.
Note: DH80 and DH80 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 de-
signed to install sprinklers when covers are in place. REMOVE
PROTECTORS BY UNDOING THE CLASP BY HAND. DO NOT
USE TOOLS TO REMOVE THE PROTECTORS.
Technical Data:
K Factor Thread
Size
Temperature
Rating Maximum
Ambient
Temperature
Sprinkler
Identification
Number
(SIN)
US Met-
ric Sprinkler SWC Cover
8.0 115,3 ¾”
155°F
(68°C)
135°F
(57°C)
135°F
(57°C)
100°F
(38°C) RA0362
Coverage Area
Flow Rate
gpm (L/min)
Pressure
psi (bar)
Maximum Coverage Area
Width x Length
ft x ft (m xm)
40 (151,4) 25 (1,7) 28 x 14 (8,5 x 4,3)
Approval Type:
• Quick Response, Extended Coverage.
• Approved for installation in accordance with NFPA 13
for light hazard occupancies.
Maintenance
Model DH80 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.
2.
Note: Minimum spacing between DH80 sprinklers is 12’ (3.7m).

Figure 1. Model DH80 FP Recessed
3.
Figure 2. Model DH80 F2 Recessed

Figure 4. Model DH80 Coverage Area
4.
Figure 3. Model DH80 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 9999970246
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 3/4” NPT (R3/4) sprinkler joint can be
obtained with a torque of 14-20 ft-lbs (19-27 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 - ½” (13mm) adjustment
F2 recessed esctucheon - 1/2” (13mm) adjustment
Ordering Information
Specify:
• DH80
- Sprinkler Finish
• DH80 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 and Black
Polyester(2)
Chrome
Bronze
White
Chrome
White
Chrome
White
Chrome
Special Application Finishes
Sprinkler FP/F2 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.