Specifications (I
/999 -6 g'
A\-.)
I l x'99 g-eJ `T '
c .
CONCEALED PENDENT SPRINKLERS, RESIDENTIAL
MODEL F978 DESIGNER, BULB TYPE, 4.2 K- FACTOR, 155 °F
GENERAL DESCRIPTION Dim. Inches MM
A - 3-5116 84,1
The 4.2 K- factor, Model F978 Design- B. 3/16 4,8
er Residential Concealed Pendent c - 2 -5/8 66,8 ,-------10 i" . 1/2"
Sprinklers (Ref. Figure A) are auto- D - Min. 1 -15/16 as,2 REDUCER
matic sprinklers of the frangible bulb D -N om. 2 -3/16 55,6 (TYPICAL
p 9 INSTALLATION)
type. They are to be used in; D - Max. 2 -7/16 61,9
• wet pipe residential sprinkler sys-
tems for one- and two- family dwell- I/2" (12,7mm)
ADJUSTMENT
ings and mobile homes per NFPA
13D, 1/2" NPT
• wet pipe residential sprinkler sys- /
tems for residential occupancies up
to four stories in height per NFPA —
13R, and 1
0 ■ — SPRINKLER/
• wet pipe sprinkler systems for the i _ ASSEMBLY
MOUNTING CUP
residential portions of any occu-
pancy per NFPA 13.
The small Cover Plate is flat, to blend F En i
in with the ceiling for an aesthetically -_-- --
pleasing and relatively unnoticeable , COVER PLATE ASSEMBLY
appearance. Standard finishes f or the e A (DIA) 3/ 32" GAP
C over •Plate are painted white and (2,4mm)
- satin chrome plated. Other factory ap-
plied painted finishes for the Cover FIGURE A
Plate are available on special order. 4.2 K- FACTOR MODEL F978 DESIGNER RESIDENTIAL
The separable two -piece design of the CONCEALED PENDENT SPRINKLERS
Cover Plate and Mounting Cup As-
semblies allows installation of the
sprinklers and pressure testing of the moved and the Cover Plate Assembly
fire protection system prior to installa- installed. APPROVALS AND STANDARDS
tion of a suspended ceiling or applica-
tion of the finish coating to a fixed The F978 Sprinklers have been de- The 4.2 K- factor, Model F978 Design -
ceiling. They also permit removal of signed to operate with a particular tem- er Residential Concealed Pendent
suspended ceiling panels for access to perature rating and heat responsive Sprinklers are listed by Underwriters
building service equipment, without thermal characteristic, as well as to Laboratories Inc. and Underwriters'
having to first shut down the fire pro- discharge water in a specific pattern Laboratories of Canada. The listing
tection system and remove sprinklers. and quantity per square foot relation- only applies to the service conditions
ship. The combination of the perfor- indicated in the General Technical
Also, the separable two -piece design mance characteristics which are asso- Data and Residential Design Criteria
of the the F978 Sprinkler provides for ciated with the F978 Sprinklers have sections.
1/2 inch (12,7 mm) of vertical adjust- been proven to help in the control of
ment, to reduce the accuracy to which residential type fires and, therefore, to Any questions concerning an interpre-
the length of fixed pipe drops to the improve the chance for occupants to tation of NFPA 13, 13D, or 13R sprink-
Sprinklers must be cut. escape or be evacuated. ler system design /installation stan-
dards, as well as requests for system
The F978 Sprinkler is shipped with a Fire sprinkler systems are not a substi- design /installation standards not ores-
Disposable Protective Cap as shown tute for intelligent fire safety aware- ently covered by NFPA 13, 13D, or
in Figure B. The Protective Cap is tern- ness or construction materials and 13R, should be addressed to the:
porarily removed to install the F978, practices required by building codes.
and then replaced to protect the F978 Secretary, Standards Council
while the ceiling is being installed and National Fire Protection Association
finished. The tip of the Cap can also be Batterymarch Park
i used to mark the center of the ceiling Quincy, MA 02269
hole into plaster board, ceiling tiles,
etc. by pushing the ceiling product WARNINGS
against the Cap. When the ceiling in- The Model F978 Designer Resi-
stallation is complete, the Cap is re- dential Concealed Pendent
Printed in U.S.A. 1 -96
TD584M
DISCHARGE IN U S. GALLONS PER MINUTE (GPM)
--------- 5 10 15 20 25 Eva
50
- - - - - - - - - -1 a MAX PRESSURE 175 PSI 3.0
I . :: SPRINKLER / MUUNTING 40 F
U
I. ,� CUP ASSEMBLY A. 2.5
ti,.. Ld; a 35 Ilk .41 c
o .a. a�
.Q Mr■IMMIMMINIM .0.
5• W 20 �w A - . b mo 2.0 W
�,� a . aOwlO • _ r • ,ems' m 0:
2 ■
2 5 - � 2P , t . 1 mu N
2 �■aaaaaat• 4 • ' • , N
1 . I C • ?O ' ,, : 1.5 u
I ' ,
1 _ _
DISPOSABLE a 20 /11.11.1.11 , : a W
, PROTECTIVE _W ? O ni
1 CAP W
I = PARTIAL CURVE ONLY
MAX. PRESSURE 12.07 BARS 0.5
TIP 5 50 75 100
DISCHARGE IN LITERS PER MINUTE
FIGURE B FIGURE C
DISPOSABLE PROTECTIVE CAP FOR F978 SPRINKLER NOMINAL DISCHARGE CURVE
Sprinklers described herein must phosphor bronze per CDA Alloy 510,
be installed and maintained in GENERAL TECHNICAL DATA and theYoke is high strength brass.
compliance with this document,
as well as with the applicable The 4.2 K- factor, Model F978 Design- The Frame is secured to the Mounting
standards of the National Fire er Residential Concealed Pendent Cup and Mounting Plate with a plated {
Protection Association, in addi- Sprinklers are available in a steel Retaining Ring. The Mounting
tion to the standards of any other 155'F/68'C temperature rating, and Cup, which is chrome plated 0.021
authorities having jurisdiction. they are rated for use at a maximum inch (0.53 mm) thick, low carbon sheet
Failure to do so may impair the service pressure of 175 psi (12,1 bar). steel, is staked to a stainless steel
integrity of these devices. The nominal installation dimensions Mounting Plate, and the Mounting
are given in Figure A. Standard fin- Plate provides for rigid engagement of
Because of the above cited ishes for the Cover Plate are painted the Sprinkler Wrench (Ref. Figure J)
white and satin chrome; however, with the Frame. • - stipulations and the varied na- }
ture of residential type architec- other painted finishes for the Cover
'
ture, there will be some compart- Plate are available on special order. A polyethelene Disposable Protective
ment designs which cannot be Cap (Ref. Figure B) is provided as part
fully sprinklered in accordance The nominal discharge curve for the of the Sprinkler /Mounting Cup Assem-
with the recommendations of F978 is plotted in Figure C and it rep- bly.
NFPA 13, 13D, or 13R. In the event resents the flow "0" in GPM (LPM) as
of this condition, consult the au- determined by the formula: The Cover Plate Assembly, which
thorities having jurisdiction for Q = K4T3 screws onto the Sprinkler /Mounting
guidance and approval. Cup Assembly, consists of a Cover
where the nominal discharge coeffi- Plate which is soldered to an Enclo-
It is the responsibility of an in- cient "K" = 4.2 (60,5); and "p" equals sure at three equidistant locations
stalling contractor to provide a the residual flowing pressure in psi around its periphery. Solder having a
copy of this document to the owner (bar). temperature rating of 135' F /57'C is
or his representative and, in turn, used with Cover Plate Assembly. The
it is the obligation of the owner to The F978 Sprinkler consists of two as- Cover Plate and Enclosure are brass
provide a copy of this document to semblies, as shown in Figure D: the per ASTM B36 (C26000 or C26800). A
a succeeding owner. Sprinkler /Mounting Cup Assembly and Type 302 stainless steel compression
the Cover Plate Assembly. Spring is located between the flange of
The owner is responsible for the Enclosure and the Cover Plate, to
maintaining their fire protection The Sprinkler /Mounting Cup Assembly ensure separation of the two pieces
system and devices in proper op- utilizes a 155'F/68'C, 3mm Bulb and when the solder melts.
erating condition. The installing has a bronze Frame per ASTM B176
contractor or sprinkler manufac- (C87800) and a brass Orifice Insert per When the Cover Plate Assembly is ex-
turer should be contacted relative ASTM B140 (C32000). The Button posed to a temperature sufficient to .
to any questions. (bulb retainer) is phosphor bronze per fuse the solder, the Cover Plate will fall
ASTM B103 (C51000, C52000, or away from the Enclosure which allows
C54400), the Ejection Spring is stain- the Deflector to drop and to expose the
less steel, and the Compression Sprinkler for operation.
Screw is a plated bronze per ASTM
B140 (C31400). The Gasketed Spring NOTES
Plate consists of an Inconel (per ASTM Absence of the Cover Plate Assem-
B168) disc spring that is sealed on bly may delay the time to sprink-
both its inside and outside edges with ler operation in a fire situation. )
a Teflont gasket. The Deflector is `,...,
brass per ASTM B36 (C22000), and The F978 Mounting Cup and
the Deflector Cone is brass per ASTM Cover Plate Assembly shown in
816 (C36000). The Deflector Arms are Figure D cannot be used to hold
—2— t DuPont Registered Trademark
. _ - .
Thermal Responsive Criteria. All
SPRINKLER/ MOUNTING CUP ASSEMBLY residential sprinklers within a compart-
MOUNTING PLATE �M ORIFICE INSERT ment (as defined by the NFPA) must
have the same heat responsive ther-
MOUNTING CUP c.o.
9 RETAINING RING mal characteristic, and their tempera-
T 6 GASKETED ture ratings must be within 10'F of
SPRING
� 10y r y
EJECTION i ■� �d, PLATE each other.
SPRING �� Wilt BUTTON
I • NOTE
DEFLECTOR ARM ' ..„: Do Not use sprinklers with a tem
=me -
• In . F RAME
'� rating ing higher than nec-
i;= o!- �, essary to cover a particular area.
YOKE =ffms&I 1A. =; BULB
s..
DEFLECTOR CONE 'rte =1! Hydraulic Design Criteria. The mini -
COMPRESSION SCREW mum required single and multiple
DEFLECTOR sprinkler flow rates are given in Table
;,;�,, z ; =ti _ b A for the maximum allowable coverage
areas. The single sprinkler flow rate is
the minimum required discharge from
the most hydraulically demanding sin-
gle sprinkler and, the multiple sprinkler
ENCLOSURE ( I o 0 ) flow rate is the minimum required dis-
� � SPRING charge from each of the total number
COVER PLATE 1 / of "design sprinklers" (as specified in
NFPA 13, 13D, or 13R).
COVER PLATE ASSEMBLY NOTE
The number of sprinklers within
each compartment (as defined by
NFPA 13, 13D, or 13R), must be
FIGURE D kept as few as possible. Do NOT
MODEL F978 CONCEALED PENDENT SPRINKLER ASSEMBLY use more sprinklers than neces-
sary to cover a particular space.
the F978 in position. The F978 3. Questions concerning sprink-
must be secured in position by ler installation and usage cri- Spray Coverage Criteria. Figures E
firmly fastening the sprinkler sys- teria, which are not covered by and F provide spacing rules that must
tem piping to the dwelling struc- the following instructions, be followed to assure that the F978
ture. If the F978 is not properly should be mailed to the atten- Sprinklers will provide their design dis-
secured in position, reaction tion of the Technical Data De- tribution of water spray. Nominal wet -
forces resulting from sprinkler partment. Include sketches ting patterns for the F978 Sprinklers at
operation could alter its orienta- and technical details, as ap- minimum required flow conditions
tion and water distribution. propriate. (Ref. Table A), are illustrated in Figure
G, for selected coverage areas.
4. In some instances, the require-
ments of this document may
RESIDENTIAL DESIGN CRITERIA concern specifications which Operational Sensitivity Criteria. For
are more stringent and which proper operational sensitivity, the
The 4.2 K- factor, Model F978 Design- take precedence over those F978 Sprinklers must be installed be-
er Residential Concealed Pendent specified in NFPA 13, NFPA neath solid ceilings having a smooth
Sprinklers must only be installed and 13D, NFPA 13R, or by the au- flat or textured surface and in accor-
utilized in accordance with the follow- thority having jurisdiction. dance with Figure A.
ing described criteria which are pro-
vided by the manufacturer. 5. The spray from the F978 is dis- The F978 Sprinklers must NOT be
tributed radially outward and used above or below open - gridded
NOTES downward from the sprinkler type suspended ceilings; beneath sof-
1. Residential Fire Sprinkler Sys- deflector. Consequently, the fits or beams having a depth of more
tems should only be designed sprinklers must be located than 4 inches (101,6 mm); and, with
and installed by those compe- such that there will not be any beams, joists, or ducts having a height
tent and completely familiar blind spaces shielded from of more than 3 inches (76,2 mm) lo-
with automatic sprinkler sys- spray by partitions, room di- cated within the sprinkler coverage
tern design, installation pro- viders, overhangs or other areas.
cedures, and techniques. parts of the dwelling structure.
NOTE
2. Several criteria may apply to General Service Conditions. The Beams having a height of more
the installation and usage of F978 Sprinklers must only be utilized than 3 inches (76,2 mm) may be
each sprinkler. Consequently, in wet pipe sprinkler systems with all located with their centerlines
it is recommended that the interconnecting system piping as well along the boundaries separating
sprinkler system designer re- as the sprinklers maintained at a mini- adjacent sprinkler coverage
view and develop a working un- mum temperature of 40'F /4'C, and areas.
denstanding of the complete with water supplies which are substan-
list of criteria, prior to initiat- tially free of contaminants and It is recommended that as part of the
ing the design of the sprinkler particles of a size greater than 1/8 inch sprinkler system design, the designer
system. (3,2 mm). review the dwelling plans and, where
—3--
MINIMUM FLOW loi S/2 MAX S,2 MAX S/z MAX
MAXIMUM AND � ES 4 IMCN ES1 � INCHES MI
COVERAGE RESIDUAL PRESSURE 1 T
AREA (a) S/2 MAX S/2 MA
4 INCHES 4 INCHES ri
FT. x FT. ONE MULTIPLE MIN MIN
(m x m) SPRINKLER SPRINKLERS # is y
S17 MAX
FLOWING FLOWING 9 (TYP) 4 INCHES
/
12x12 16 GPM 12 GPM , —J,---
(3,7 x 3,7) (14.5 PSI) (8.2 PSI) Figure E -1 (Plan View) Figure E -2 (Plan View)
14 x 14 16 GPM 12 GPM S/2 MAX 4 S/2 MAX S/2 MAX. \ S MAX S/2 MAX
(4,3 x 4,3) (14.5 PSI) (8.2 PSI) j 4 INCHES 1 INCHES t ' INCHES 8 FEET MIN 1 4 INCHES
MIN. MIN II MIN MIN.
—1,— —
16 x 16 16 GPM 12 GPM 4 INCHE 4 INCH
INCHES
(4,9 x 4,9) (14.5 PSI) (8.2 PSI) i MIN ll MIN.
•
T 0 Lx
18x18 24 GPM 17 GPM
(5,5 x 5,5) (32.7 PSI) (16.4 PSI) s1vlAx s
8 PEP AA B FEET MIN.
20x20 25 GPM 18 GPM
(6,1 x 6,1) (35.4 PSI) (18.4 PSI) • 1 t
S/7 MAX S/7 MAX.
4 INCHES 4 INCHES
MIN MIN
(a) For coverage area dimensions less _l___ ,
than or between those indicated, it is
necessary to use the minimum Figure E - 3 (Plan View) Figure E (Plan View)
required flow for the next highest -
coverage area for which hydraulic
I s/2 Max. IS/2 MAx. S2 MAX
design criteria are stated. 4INCHES 4INCHES
MIN MIN
(b) Requirement is based on minimum flow 7_
in GPM from each sprinkler. The I s/7
associated residual pressures are st1r 4 INCHES
J S/2 MAX
MIN 0
calculated using the nominal K- factor. s/z MAX. f • 1 4 1
� _
rau Design R to Hydraulic Desi Criteria 4 INCHES , t
y g MIN � ? Mq � 4 INCHES
Section for details. 0 8 FEET 4INCHE� MIN
MIN MIN.
E \ INCHES MIN
TABLE A 2M — S MAX
HYDRAULIC DESIGN CRITERIA S2 MAX. 8 FEET MIN.
4 INCHES
MIN. Figure E-6 (Plan View)
S/2 MAX S MAX S/2 MAX.
14 INCHES 8 FEET MINIMUM 4 INCHES
MIN. MIN {,-4 INCHES MIN
Figure E -5 (Plan View) I —_
S/7 MAX
S/2 = ONE -HALF THE LENGTH OF THE 4 INCHES
MIN.
COVERAGE AREA BEING
HYDRAULICALLY CALCULATED ._S/2 MAX .
(REF. TABLE A). _ I
S = THE LENGTH OF THE COVERAGE x 4INCHES MIN
<111-1:\ I AREA BEING HYDRAULICALLY 4
IN
AREA
CALCULATED (REF. TABLE A).
' MIN 41M
Figure E -7 (Plan View)
S/2 MAX.
8 FEET MIN l
SEE SEE
S/2 MAX. .I t_ GRAPHA GRAPH A'
1 4 INCHES r
MIN
CID -0-OBSTRUCTION -------------4".. U
Figure E -8 (Plan View) Figure E -9 (Elevation View)
FIGURE E
SPACING RULES UNDER LEVEL CEILINGS
–4—
• S�
MAXIMUM J!1` Si2 / F� ' 4 .1'
° 7 M 4 1 ' i' S
12� '( \ �— F �r (i " M 3 FEET MAX ` B F M ' 4 1 - i
9 \ F Op M iti M F'6)- RI
44%441 MU S
�.M rF MM
(7) M �� r
�A A
I 8 FEET MINIMUM I A A
FOR cA 560'
Figure F -1 (Elevation View) Figure F -2 (Elevation View)
S/2 MAX S MAX. ' \
SEE GRAPH B
y C
I
fOR,q /S /60M A� FORM /5 / 60 M A�
1
Figure F -3 (Elevation View) Figure F-4 (Elevation View)
MAXIMUM 0 A` 4,. M4
MG M
,...)-A ,., FO R FEET MINIMUM B� I
I tAanyzB 560' i SEE SEE
GRAPH D GRAPH D
Figure F -5 (Elevation View) Figure F -6 (Elevation View)
3 FEET MAX MAXIMUM P F
1 FOOT MIN.
G
0 �P + 4 s e- �M
S. S . 4 y I S/2 MAX —j,
/ FOP L P SEE APH / A 8FOR A 560'
I NIMUM AA.C. GR E
Figure F-7 (Elevation View) Figure F -8 (Elevation View)
/
3 FEET MAX. M/y e - y 4
QprM /N CRgSFF
A
4 N I
OBSTRUCTION __
Mft S/2 MAX
4 INCHES MIN
Figure F -9 (Elevation View) Figure F -10 (Elevation View)
S/2 = ONE -HALF THE LENGTH OF THE COVERAGE AREA BEING HYDRAULICALLY CALCULATED (REF. TABLE A).
S = THE LENGTH OF THE COVERAGE AREA BEING HYDRAULICALLY CALCULATED (REF. TABLE A).
NOTES: 1. Figures F -1 through F -9 only apply when:
(a) the ceiling ridge is horizontal;
(b) the compartment openings to adjoining spaces have minimum lintel depths of 8 inches (203,2 mm) below the lowest sprinkler;
(c) any adjacent sprinklers in the direction of the ceiling ridge are to be in a row which runs parallel to the ridge,
and the sprinklers are to be spaced a minimum of 8 feet apart;
(d) the sprinklers are installed with Deflector Arms perpendicular to the ceiling ridge; and,
(e) the sprinklers shown in Figures F -1 through F -8 are located in a plane which is perpendicular to the ceiling ridge,
and the ceiling angles are within the specified range.
2. Contact the Technical Data Department for questions concerning installations outside the scope of Figures F -1 through F -10.
FIGURE F, SPACING RULES UNDER PITCHED CEILINGS AND /OR OVERHANGS
—5---
V
p 2 2 0
4' 4•
0' . 1 q• Q' 0 ' 6 8. 1O 8 in (
2. 1 a Liww� ■ 1 �2 0' _ z ,. 8 s , 4 • ' o Z 11VW.w\
N�` �`�
I I I I '�� _?' 4 4'
I MpAV 1 4 2 -- 1111111111111.1111 ,
s ppn� I i11�11111ti \\\v \ \ \\ , g 1 ; 6'
■ / . v 6 4 _ 1., __ 1 , .
8' 8' 8 i 8' 8 8.
--
i
8 ' 8
12' X 12' Coverage Area r
16 GPM
12 GPM 16' X 16' Coverage Area 20' X 20' Coverage Area
16 GPM 25 GPM
12 GPM 18 GPM
FIGURE G
NOMINAL WETTING PATTERNS
AT MINIMUM REQUIRED FLOW CONDITIONS
FOR SELECTED COVERAGE AREAS
27 = =mamma
==
ma
24 = = a. mom.
a'•mur mma mO • mn.■
ma mama== ■mama= V ■m v v n•
21 am , ■ ° ■ , Z A= ' .7� 4 ' J P i 0 (
W Ora ■ O um �O ■ ' O son _ G r 40 r s A ( v j ma
0 18 mammmm■mmama Q 4 • QC m Q ' \ i mam
w '�ni .G
G. im ■ 4 CZ • amm
15 ra �� ^, m m mm • \
cc m } -- um mm
■ �Q Q : Q jm P O mamma=
O immmu.
■ ■ = a � •� � - AM m m r mm
=� 12 ray.mmm =m
s. 2 0 a'. ma EM.m m• JO Er ■m mm m
Mr ANNE namar /ME r A.
Z �� X Q am mm na.
Q� ar SOMME mam 'a r'
■ m■u■
w � . d a mmmo Er.. u■
(MAX.) V mammam u■
Sma mam / Imaa Am r' .gym mm mu■
mmmmwam■a
3 mm mm � �•
mm mmi amal a• a u ■mm mm u ■u■
mm mamar amal NM d u ■mm mm■uu■
■°mm. alma• all u mm mu ■m ■a ■u
mm mama alma m'm u■m ==tutu:
lit
0 mamma= NM 1M I
1 V 0 1 2 3 4 5 6 7 8 9 10 PLUS a
(MAX.) �j
DISTANCE TO OBSTRUCTION I
'H' OR 'Z', FEET
NOTES:
1. CEILING OBSTRUCTIONS MUST BE SPACED ON THE BASIS OF USING THE MAXIMUM RESIDUAL PRESSURE WHICH WOULD BE
PRESENT FOR A SINGLE SPRINKLER OPERATION.
2. BEAMS AND /OR OTHER CONTINUOUS OBSTRUCTIONS ARE NOT TO EXCEED A VERTICAL DEPTH 'V' OF MORE THAN 3 INCHES
(76,2 mm) WITHIN THE SPRINKLER COVERAGE AREA.
GRAPH A o
MAXIMUM PERMITTED VERTICAL DISTANCE BETWEEN THE SPRINKLER MOUNTING SURFACE AND
THE BOTTOM OF CEILING MOUNTED OBSTRUCTIONS SUCH AS BEAMS, OVERHANGS, AND LIGHT FIXTURES
WITHOUT UNDULY OBSTRUCTING THE WATER SPRAY DISTRIBUTION
r — -- _ _ _ __ .- �.......___ _ _ _ ". .. _ _ -
I—
W
W
p = 3 W.o =III
w �...■n. Ems Km. ■m. WEE MEW �. ■ . ■lam SW
1) — —.' m museum= and m.. and 0
_ ■.m ■W■ my �.WE■■MM■
11••=1•111 NIMMIIII
Q ��p ..■ m.. um m ® mum..
WI_ .m. u... u ■u WE WE ml•_� ��WE m .mu
� .W MEMO ... WEE ■.i. ■.uu u.n. tllt mu mu MEW
DJ ..I. MEMO .....MAIM ■m. ..
2 Q sr.= ..m VW WE WE mu EMEMEM mu mu and WE
'..u. u.s■ .uu WE .uu
Zz YYi viii i. EWEN Y ■■ iW WE MEW mu u.n u■.■
20 0
NJ
0 5 10 15 20 25 30 35 40 45 50 55 60
O CEILING ANGLE 'A', DEGREES
H
(MIN.)
NOTE: SPRINKLERS MUST BE INSTALLED WITH DEFLECTOR ARMS PERPENDICULAR TO THE CEILING RIDGE.
GRAPH B
MINIMUM REQUIRED HORIZONTAL DISTANCE BETWEEN
A SPRINKLER LOCATED ON A LEVEL CEILING
AND AN INTERSECTING PITCHED CEILING
WITHOUT UNDULY OBSTRUCTING THE WATER DISTRIBUTION
3 FEET MAXIMUM
s.
WHEN THERE ARE
` NO SPRINKLERS ON COVERAGE AREAS:
THE LEVEL CEILING
Y (a) 20' x 20' (c) 16' x 16'
(MIN.) �� (b) 18'x18' (d) 14'x14' &12'x12'
6 —
ma — um Nam WEE .■.0 um WEE EWE -- .l
WE SW
P--:-... siiiiiri sm. mu ,
so....... ow. ■.m .ddKum mum pr."-_. NW and ■m. s u=. s .
5 �i■®ma am vs
W mdssmmu..mus.. r� m � EMU •
p and and and u.n EWE PtO u... tea.u... .s..■ ■.mu.0
W �� W Wm� OW W WS WE
Q 4 sm ■gym.■ WE V/ ABM ■s ANEW EWE WO m.■ WE ■u.■
D" MEW NEW NNW u.s' MEW • tm WEE WE ..u. WE .s...
LU 0 ow WE WEE W •E W•41 KW WE SW WEE EMMA
==mov s• ..u muum■...■■.......■ ■.
2 F mu ..m.mr.m • .a.o.d M■d..........u - as
.ms.. WEIKE • MI a.0 WE mu .d.■ ■ • .m. WE
M5 ®N WE ,
uisw WE MEW ..rl i.s.i mu.
p .�andv o IEu...m.■um■W EM" .u■.m.m■■....
Z I - 2 m.� =muss w mum warm Nam mop 'Arm u.u.m ■..m
..m ..m m/ I.' lu.l.0 u... ..u. KW, ME .ss
Q
..m EWE E m' Al / m• WEE MEW WEE EM/ .. um um u... -_+.
mdo. /.sumuumusur /s. ..ms..s.��.
J dm and .• AP'. mu u... ....■ ■..s....■ WEE BMW
1 mum■.• � I■.uo■m.mu■.. - �um.■m.�ii
. E ■.s. / m M.. ..m mr'�. ■.m. n. � WI
, ®� mad and M... ° NEW u..."' ■.d■
um ud um um
■s.■. worms ■mum
— m■ and ma NEW OWN um .m. WE UMW EWE u...
0 ■m. .d.. WE .m. NEW
0 5 10 15 20 25 30 35 40 45 50 55 60
CEILING ANGLE 'A', DEGREES
NOTE: SPRINKLERS MUST BE INSTALLED WITH DEFLECTOR ARMS PERPENDICULAR TO THE CEILING RIDGE.
GRAPH C
MINIMUM REQUIRED SLANT DISTANCE BETWEEN
A LEVEL CEILING AND A SPRINKLER LOCATED ON A PITCHED CEILING
WITHOUT UNDULY OBSTRUCTING THE WATER DISTRIBUTION
—7—
10 • 4" TO 6„
`--- - -••• -- - (SEE NOTE 2)
- - -- — _ �\
9 - — -. UNA =._ _ - - - - _`M SURFACE
w
0
c c 7 1 f '
aV) 0 I N (MAX.) N (MAX.)
jClw 6 ' , : ' ; E' ' } (SEE NOTE 1) (SEE NOTE I)
NOTES:
<O 5 1 ■ 1. UP TO A MAXIMUM OF ONE -HALF THE LENGTH OF
E ' ' ' ' ' ' ' ' ' _ ' , ' ' _ ' • ; I THE COVERAGE AREA BEING HYDRAULICALLY
0
-- -�-- -- ACCEPTABLE CACULATED.
I-
I 2. THE MOUNTING SURFACE MUST BE LOCATED
WITHIN 4 TO 6 INCHES (101,6 to 152,4 mm)OF THE -I
PEAK, IF IT IS NOT CONTINUOUS OVER THE FULL
10 15 20 25 30 35 40 45 50 55 60 LENGTH OF THE CEILING RIDGE.
CEILING ANGLE 'A', DEGREES
3. SPRINKLERS MUST BE INSTALLED WITH DEFLECTOR
ARMS PERPENDICULAR TO THE CEILING RIDGE.
GRAPH D
MAXIMUM WATER SPRAY DISTRIBUTION WHEN A SPRINKLER IS LOCATED AT A PEAK
1- 10 - (s
LL -- - N0).
2/
w? 9 - - - - -._ - _ �. --
�w — UNACCEPTABLE
• I f.12 8 - - —
wl- p y
20Z - - -- -- - -- .6 I '
D 7 _ _ -44141 J (MAX.)
0
, z - _ _ ACCEPTABLE (SEE NOTE))
M • IN 6 — - NOTES: 1
___.1__
1--- hl
1. UP TO A MAXIMUM OF ONE-HALF THE LENGTH OF THE
x , COVERAGE AREA BEING HYDRAULLICALLY
5 CALCULATED.
0 5 10 15 20 25 30 35 40 45
2. 3 FEET (914 mm) IS THE MAXIMUM PERMITTED AND
CEILING ANGLE, DEGREES 1 FOOT (305 mm) IS THE MINIMUM REQUIRED.
(USE THE GREATER OF ANGLE 'A' OR ANGLE 'B')
3. SPRINKLERS MUST BE INSTALLED WITH DEFLECTOR
ARMS PERPENDICULAR TO THE CEILING RIDGE.
GRAPH E
MAXIMUM WATER SPRAY DISTRIBUTION
WHEN A SPRINKLER IS LOCATED ON A PITCHED CEILING
OPPOSITE FROM AN INTERSECTING PITCHED CEILING
5 -.W mu
1- ■W ■ wail own ..... =V ., WINE .uo COVERAGE AREAS: h /
Ewa MM. =MBE Wan da NSW man M
o LL M. mm� mu m"!: ' -u P: m (a 20' x 20' 611.) w 4 ma, OW mu ar-ss mum i Au • .• m
CC ■ma mu mu •• Ann WIMP • -awn MEW
uuama.unur .. uua'.aaa.. (b) 18 x 18
amnmuma uu� �_F uu►�m .n i
-
aw u_u..a..a uarn m (C) 16 x 16' 1
u W ma► .aaa ►aaa..aaa r av
cc 3 uu.m,.ma� . — __ - _ _ - `
WEN ■oar- aa (d) 14 x 1 4 '
21- uWa ■■ ■......W..
=U ,o•"W ■ % Ir nva (g) 12' x 12' yA 1 ■
` A�
Wn. •.W. naau- :ana.■ ■■ aa"
2� �W /IOW u.. Wd r...uu • u /av
Z 2 " ' nwF.mum'a. aura; u_u'Au — ) I S/2 MAXIMUM ( i
Z 1W
M < ar , a. uunu�au.a m��.a
anuW I (SEE NOTE I )
J ..muu. rnrannmAUW NOTES:
to 1 uduW .aW .mr�ann u. a naaaa ,
10 15 20 25 30 35 40 45 1. UP TO A MAXIMUM OF ONE -HALF THE LENGTH OF THE COVERAGE
CEILING ANGLE 'A', DEGREES AREA BEING HYDRAULICALLY CACULATED.
2. SPRINKLERS MUST BE INSTALLED WITH DEFLECTOR ARMS
PERPENDICULAR TO THE CEILING RIDGE.
610
GRAPH F
MINIMUM REQUIRED SLANT DISTANCE BETWEEN A RIDGE AND A SPRINKLER
WITHOUT UNDULY OBSTRUCTING THE WATER DISTRIBUTION
—8—
To prevent the possible release of an F978 Sprinkler's heat responsive �/' ::/
element (Bulb), due to exposure to heat sources other than abnormal .
fire, the 155'F/68'C F978 Sprinklers are only to be installed where the
maximum (non -fire) temperature of all the sprinklers within a compart- '--,-4~.'-' .., T•
ment will not exceed 100'F/38'C. ruy
The sprinkler system piping must NOT be run through heating ducts, or 2' R. MP 1 /'" -
connected to the domestic hot water system. 3' (TYP.)
1. 1.�
The following areas are examples of locations where the ambient FROM EDGES .
temperatures may exceed 100'F/38'C. The F978 Sprinklers must NOT °°o � .
p
be located in these areas unless the system designer can document
that the ambient temperature of the sprinklers will not exceed � I. l irx•
100'F/38'C with the heat source in use at maximum output.
1. Where they will be exposed to the rays of the sun passing through glass Recessed Hearth Fireplace
or plastic skylights.
2. In unventilated compartments containing a furnace or water heater.
3. In unventilated attics or in an unventilated - concealed compartment
under an uninsulated roof. k
4. Within 2 feet (610 mm) of an outside edge of a ceiling mounted, 1 �
downward discharging diffuser. S
5. Within 2 feet (610 mm) of the left or right edges of a horizontal 3• -6• (TrPI :.," c`°.0'• 3.-6.
discharging heat diffuser or within 3 feet (914 mm) of the front of a ar t• :xsc ;,-.,„-v.. ho discharging heat diffuser. 2' R (TYP) —' K=
6. Within the following distances of exposed light fixtures: ; I
r∎
loes a
Wattage Minimum OF s STOVE
Range Distance "'
Less than 250 6 inches (152 mm) ��
250 -499 1 foot (305 mm) _
500 -999 2 feet (610 mm)
1000 and more 3 feet (914 mm) Coal or Wood Burning Stove
7. Within 18 inches (457 mm) of the side of an uninsulated heating duct.
8. Within 1 foot (305 mm) of an uninsulated hot water pipe. _
3 9. Within the shaded areas shown in in the adjacent illustrations. `,.` � j . J 3 ,TYP)
10
':; • - 4 . .it:.S%�.1:. .�•. 4. "t
3
t-4.7
-. : , t _ . V', {_ .. r r,; 2' R (TYRI
IT rPI MR/
I - R ITYRI `
}. JSi ifs:
.; -tiii Open Hearth Fireplace
•} _
� :
�`�. •. ^ - 7,4 2. 4,;:. I •. 6 - 18" MP TO runs) 'vlp,.. .L:,e_1': : ` I TN ❑ a! '
(TYP/ 0 1. j, 6" (TYP )
r
f 6
"1"' 1' - r '
■ ��
� I W = =,
6 ▪ (ALL AROUND) :3[
MECMIM III II =__ -_= _-
s r.
.4 Range or Wall Oven Furnace or Water Heater
FIGURE H
HEAT SOURCE CRITERIA
—9—
-
•
appropriate, advise the owner or his — WRENCH TAB
representative as to the following.
MOUNTING CUP
I. Lintels of at least 3 inches (76,2 mm) = SLOT
in height and preferably 8 inches
(203,2 mm) should be used over all (4
passageways from one space to an-
other, in order to reduce the possibil-
ity of sprinkler operations outside of
the fire area.
II. Beams of at least 3 inches (76,2
mm) in height should be used to
border each of 5 or more adjoining /- WRENCH
areas of F978 Sprinkler coverage
(within the same compartment), in 11
order to decrease the time to first
sprinkler operation as well as to re- I.1/16" (27 mm) HEX
duce the possibility of multiple 1/2" RACHET DRIVE
sprinkler operations. INDICATING BOSSES ARE IN LINE WITH DEFLECTOR ARMS
Cold Soldering Criteria. Figures E
and F provide the minimum spacing FIGURE J
requirements necessary for prevent- MODELS F874 SPRINKLER WRENCH
ing the wetting (i.e., cold soldering) of
the heat responsive element (Bulb) of
a non - operated F978 Sprinkler, which sufficient adjustment in the
is adjacent to one which has operated. INSTALLATION Sprinkler Assembly by under- or
over - tightening the Sprink-
Heat Source Criteria. Figure H out- NOTES ler /Mounting Cup Assembly. Re-
lines the requirements relating to pre- Residential Fire Sprinkler Sys- adjust the position of the sprink-
venting the possible release of an tems should only be designed and ler fitting to suit.
F978 heat responsive element (Bulb), installed by those competent and
due to exposure to heat sources other completely familiar with au- A leak tight 1/2 inch NPT sprink-
than abnormal fire. tomatic sprinkler system design, ler joint should be obtained with
installation procedures, and a torque of 7 to 14 ft. lbs. (9,5 to
techniques. 19,0 Nm). More than 21 ft. lbs.
(28,5 Nm) of torque may distort
The Technical Data Department the sprinkler orifice seat with
should be contacted relative to consequent leakage.
any questions.
Proceed with the installation as fol-
The F978 Sprinkler is inoperative lows:
with the Disposable Protective
Cap in place. 1. The pipe connected to the sprinkler
fitting should be cut so that the bot-
Do not install any bulb type torn face of the fitting is between
sprinkler if the bulb is cracked or 2 -1/16 and 2 -5/16 inch (52,4 and
there is a loss of liquid from the 59,0 mm) above . the ceiling line. By
bulb. With the sprinkler held hor- using a 1/4 inch (6,4 mm) range for
izontal, a small air bubble with the "D" dimension shown in Figure •
an approximate diameter of 1/16 A, the remaining 1/4 inch (6,4 mm)
inch (1,6 mm) should be be pres- of adjustment can be used to conv-
ent. pensate for the possible manufac-
turing variations in the make -in of the
All sprinklers installed within sprinklers and the take -out of fittings
compartments having a pitched (as permitted by ANSI B1.20.1).
ceiling with one or two parallel
horizontal ceiling ridges must be 2. Apply pipe thread sealant sparingly
installed with the Deflector Arms to the sprinkler threads only. Use of
perpendicular to the ceiling a Teflont based pipe joint sealant is
ridges. Failure to properly orien- recommended.
tate the Deflector Arms may result
in impaired fire protection due to 3. Remove the Protective Cap and
cold soldering and /or inadequate then using the Model F874 Wrench,
spray coverage. positioned as shown in Figure J, in-
stall and tighten the F978 Sprink-
Only use the Model F874 Sprink- ler /Mounting Cup Assembly into the
ler Wrench for installation of the fitting. The F874 will except a 1 -1/16
F978 Sprinkler. Do not wrench on inch (27 mm) hex socket or a 1/2
the Sprinkler /Mounting Cup As- inch rachet drive.
sembly other than as shown in
Figure J. After installing the Sprinkler /Mount-
ing Cup Assembly, the Protective
Do not attempt to make -up for in- Cap is to be reinstalled until the cell-
-1 n— t DuPont Reolstered Trademark
ing installation and finishing is corn- fore and after installation. Sprinklers and larvae by gently brushing
plete. The Cap is intended to help damaged by dropping, striking, with a feather duster or gently
prevent damage to the F978 Sprink- wrench twist/slippage, or the like, must vacuuming with a soft bristle (i.e.,
ler during ceiling installation and/or be replaced. Also, replace any sprink- dusting) brush attachment.
during application of the finish coat- ler that has a cracked bulb or that has
4 ing of the ceiling. Also, the tip of the lost liquid from its bulb (Ref. Instal- The minimum vertical clearance
Cap can be used to mark the center lation Section). between the tops o
P ) p of free standing
of the ceiling hole into plaster board, partitions, room dividers, cab -
ceiling tiles, etc. by pushing the ceil- NOTES inets, storage racks, stock piles,
ing product against the Cap. Absence of an Escutcheon Plate etc., and the sprinkler deflector is
may delay the time to sprinkler NOT to be less than the clearance
5. After the ceiling has been completed operation in a fire situation. given below.
with the 2 -5/8 inch (66,8 mm) diam-
eter clearance hole and in prepara- Before closing a fire protection Horizontal Distance Vertical
tion for installing the Cover Plate system main control valve for from Sprinkler Clearance
Assembly, remove and discard the maintenance work on the fire pro- to Item, ft. (m) In. (mm)
Protective Cap, and verify that the tection system which it controls,
Deflector falls freely. permission to shut down the al- More than 6
fected fire protection systems (1,8) 24 (610)
If the F978 Sprinkler has been dam- must be obtained from the proper From 3 to 6
aged and the Deflector does not fall authorities and all personnel who (0,9 to 1,8) 19 (483)
freely, replace the entire F978 may be affected by this action Between 2 and 3
Sprinkler assembly. must be notified. (0,6 to 0,9) 16 (406)
From 1 to 2
6. Screw -on the Cover Plate Assembly It is recommended that automatic (0,3 to 0,6) 13 (330)
until its flange comes in contact with sprinkler systems be inspected Less than 1
the ceiling, and maintained in accordance (0,3) 10 (254)
with the advice and suggestions
Do not screw -on the Cover Plate given in NFPA 13, 13A, 13D, and
Assembly such that it will lift a ceiling 13R, as applicable. Exercise suitable safety precau-
panel out of its normal position. tions in the use and storage of
It is recommended that automatic highly flammable and potentially
If the Cover Plate Assembly can- sprinkler systems be inspected quar- explosive materials. The rapid
not be engaged with the Mount- terly by a qualified Inspection Service. rate of fire development and
ing Cup or the Cover Plate As- spread which can be caused by
sembly cannot be engaged The F978 Sprinklers must only be re- such materials can reduce the
sufficiently to contact the ceil- placed with pendent sprinklers which ability of the sprinkler system to
ing, the Sprinker has been posi- are listed for residential fire protection aid in the control of a fire in
tioned incorrectly and must be service and which have the same nom- which they are involved.
repositioned according to Step inal K- factor, the same coverage area,
No.1. the same or lower flow ratings (as indi-
cated under °Hydraulic Design Cri-
teria").
All residential sprinklers installed
within a compartment (as defined by
the NFPA) must have the same heat
responsive thermal characteristic, and
their temperature ratings are to be
within 10'F of each other.
CARE AND MAINTENANCE REMODELING
NOTES
The F978 Sprinklers must never be Wet pipe sprinkler systems must When remodeling, such as by adding
shipped, stored, or used where their be maintained at a minimum tem- false beams or light fixtures or chang-
temperature will exceed 100'F/38'C perature of 40'F /4'C. Exposure to ing the location of compartment walls,
and they must never be painted, freezing temperatures can result first verify that the new construction
plated, coated, or otherwise altered in bursting of the pipe and /or will not violate the installation require -
after leaving the factory. Modified sprinkler. ments stated under WARNINGS. Alter
sprinklers must be replaced. Sprink- the new construction and/or the sprink-
lers that have been exposed to corro- Do NOT enclose sprinklers within ler system to suit the requirements of
sive products of combustion, but have drapes, curtains, or valances. this document.
not operated, should be completely
cleaned by wiping the sprinkler with a Do NOT hang anything from the
cloth or by brushing it with a soft bristle sprinklers.
brush.
Automatic sprinklers are NOT to
NOTE be tested with a heat source. Op-
Particular care to prevent over- eration of the heat responsive ele-
heating must be exercised when ment (Bulb) can result.
storing sprinklers in cars, trucks,
trains, or other vehicles on warm, Do NOT cleanse the sprinklers
bright sunny days. with soap and water, detergents,
ammonia, cleaning fluids, or
Care must be exercised to avoid dam- other chemicals. Remove dust,
age to the F978 Sprinklers - both be- lint, cobwebs, cocoons, insects,
ORDERING PROCEDURE •
LIMITED WARRANTY
Orders for the Model F978 Designer The manufacturer warrants for a period of one year from the date of sale
Residential Concealed Pendent (warranty period) that the product(s) sold hereunder are free from defects
Sprinklers must include the descrip- in material and workmanship. Our obligation under this warranty is limited
tion and Product Symbol Number to repair or replacement, or, at our option, we will repay the price paid for
(PSN) where applicable. the product(s), plus any transportation charge paid by the purchaser. In
the case of replacement, we will pay the transportation charges to the
Contact your local distributor for avail- location of the defective product. We must be given the opportunity to
ability. inspect any product you believe to be defective. To make a claim under
this limited warranty, you should contact our Sales Services Manager at
Sprinkler Assemblies: (401) 886 -3105.
Specify: 4.2 K- factor, 155'F/68'C,
Model F978 Residential Concealed THERE ARE NO OTHER WRITTEN OR ORAL WARRANTIES. ALL
Pendent Sprinkler with (specify type IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
finish) Cover Plate, PSN (specify). A PARTICULAR PURPOSE ARE LIMITED IN DURATION TO THE
DURATION OF THE LIMITED WARRANTY SET FORTH ABOVE.
Painted White
Cover Plate PSN 51.978 -0 -155 The manufacturer does not assume any other obligation in connection
Chrome Plated with the sale of the product(s) by purchaser.
Cover Plate PSN 51- 978 -9 -155
Contact your local distributor for This warranty shall not apply to any product(s) which have been installed
availabilty. in violation of written instructions furnished by the manufacturer, repaired
or altered, misused or damaged, or not properly maintained.
Product Symbol Numbers are not
specified when ordering F978 Sprink- The manufacturer is not liable for indirect, incidental or consequential
lers with a special painted finish for the damages in connection with the use of the product(s).
Cover Plate. It is suggested that a
color chip be provided when ordering Some states do not allow limitations on how long an implied warranty
special painted finishes. Otherwise, lasts, or exclusion or limitation of incidental or consequential damages,
responsibility for duplication of the de- so the above limitations or exclusion may not apply to you.
sired finish cannot be accepted. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU
Separately Ordered Parts: MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO
Specify: Model F874 Sprinkler STATE.
Wrench, PSN 56- 976 -1 -001.
Order for NFPA publications should be
addressed to the:
Publication Sales Department
NFPA PATENTS
Batterymarch Park
Quincy, MA 02269
The following patent is applicable to
Replacement Parts: the Model F978 Residential Con -
Specify: (description) for use with cealed Pendent Sprinkler:
F978 Sprinklers, PSN (specify).
U.S.A. 5,152,344
Sprinkler /Mounting Cup Assemblies
are not available as replacement parts.
WEIGHT
Painted White
135'F/57'C
Cover Plate The nominal weight of the Model F978
Assembly PSN 56-978-0-155 Residential Concealed Pendent
Chrome Plated Sprinkler is 7.2 oz. (204 g).
135'F/57'C
Cover Plate
Assembly PSN 56-978-9-155
Product Symbol Numbers are not
specified for replacement Cover Plate
Assemblies with special painted fin-
ishes. Records are not maintained of
previously ordered special painted fin-
ishes. Therefore, it is suggested that a
color chip be provided when ordering
replacement parts with special painted
finishes. Otherwise, responsibility for
duplication of the desired finish cannot
be accepted.
® Reg. trademark of GRINNELL CORPORATION, 3 TYCO PARK, EXETER, NH 03833 A 'NCO INTERNATIONAL LTD. COMPANY