Viking MICROFAST M-4 Instruction manual

1. PRODUCT NAME
VIKING Microfast®Model M-4
Small Orifice
Residential Pendent Sprinkler
2. MANUFACTURER
THE VIKING CORPORATION
210 N. Industrial Park Road
Hastings, Michigan 49058, USA
Telephone: [phone]
[phone]
Fax No: [phone]
From outside the U.S.A.:
Telephone: [phone]
Fax No: [phone]
e-mail: [e-mail]
3. PRODUCT DESCRIPTION
The Viking Microfast®Model M-4 Small
Orifice Residential Pendent Sprinkler is
a small, high-sensitivity, glass-bulb
spray sprinkler. The sprinkler is avail-
able in several finishes, with tempera-
ture ratings to meet design require-
ments. The sprinkler is listed for use
below smooth, flat, horizontal ceilings
and ceilings with slopes up to and in-
cluding a 6/12 pitch. (26.6°) The small
orifice design, with a K Factor of 4.3,
allows efficient use of available water
supplies for the hydraulically designed
fire-protection system. The small, rug-
ged, 3mmglass-bulbandspecial deflec-
tor combine speed of operation and ar-
eas of coverage to meet residential
sprinkler standards. During fire condi-
tions, the heat-sensitive liquid in the
glassbulbexpands,causingtheglassto
shatter, releasing the pip cap and seal-
ing spring assembly. The water flowing
through the sprinkler orifice strikes the
sprinkler deflector, forming a uniform
spray pattern to extinguish or control the
fire.
4. TECHNICAL DATA
See chart for approvals.
See chart for minimum water supply re-
quirements and maximum areas of
coverage.
Glass-bulb fluid temperature rated to
-65°F (-55°C).
Rated to 175 PSI (1 207 kPa) water
working pressure.
Factorytested hydrostaticallyto500 PSI
(3 448 kPa).
Spring: USA Patent No. 4,167,974
Bulb: USA Patent No. 4,796,710
Testing: USA Patent No. 4,831,870
Thread Size: 1/2" (15 mm) NPT
K Factor: 4.3 (6,2 Metric*)
*See Footnote 8 on approval chart.
SPRINKLER MATERIALS:
Frame - Brass Castings UNS-C84400
Form No. F_082095
Sprinkler 140 a
June 4, 1998
TECHNICAL DATA
Replaces sprinkler page 140 a-c, dated August 25, 1997
(updated approved finish and escutcheon lists).
APPROVED APPROVED FINISHES APPROVED ESCUTCHEONS
TEMPERATURES 1: Brass, Bright Brass, Chrome- X: Standard surface or F-1 Adjustable
A: 155° F (68°C) Enloy®, White (Paint), and Escutcheon, or recessed with
and 175°F (79°C) Navajo White E-1 Recessed Escutcheon
3Base part number shown. For complete part number, see price list.
4This chart shows the listings and approvals available at the time of printing. Other approvals are
in process. Check with the manufacturer for any additional approvals.
5Listing is for residential occupancies with smooth, flat, horizontal ceilings.
6Listing is for residential occupancies with smooth ceilings with slopes up to and including a 6/12
(26.6°) pitch.
7Listed by Underwriter’s Laboratories, Inc. for use in Canada.
8Acceptance for use by City of New York Department of Buildings is pending.
9For areas of coverage smaller than shown, use the "Minimum Water Supply Requirement" for the
next largest area listed with sprinklers of similar K factor.
10 Areas under sloped ceilings must be measured along the ceiling slope. Actual floor coverage under
sloped ceilings will be less than the listed Area of Coverage.
11 Metric K Factor shown is for use when pressure is measured in kPa. When pressure is measured in
BAR, multiply the metric K Factor shown by 10.0.
12 The Model F-1 Adjustable Escutcheon is considered a surface-mounted escutcheon because it does
not allow the fusible element of the sprinkler to be recessed behind the face of the wall or ceiling.
NOTE: Install residential pendent sprinklers with deflectors between 1" (3/4" for recessed) & 4" below
the ceiling.
Maximum Areas Minimum Water Supply Requirements
of Coverage9Single Sprinkler Two or More UL5ULC7 NYC8
12’ X 12’ 11.5 GPM @ 7.2 PSI 11.5 GPM @ 7.2 PSI
3.7m X 3.7m 43,5 L/Min @ 49,3 kPa 43,5 L/Min @ 49,3 kPa A1X A1X --
14’ x 14’ 13 GPM @ 9.1 PSI 11.5 GPM @ 7.2 PSI
4.3m x 4.3m 49,2 L/Min @ 63,0 kPa 43,5 L/Min @ 49,3 kPa A1X A1X --
16’ x 16’ 13 GPM @ 9.1 PSI 11.5 GPM @ 7.2 PSI A1X A1X --
4.9m x 4.9m 49,2 L/Min @ 63,0 kPa 43,5 L/Min @ 49,3 kPa
18’ x 18’ 16 GPM @ 13.8 PSI 13.5 GPM @ 9.9 PSI A1X A1X --
5.5m x 5.5m 60,6 L/Min @ 95,6 kPa 51,1 L/Min @ 68,0 kPa
20’ x 20’ 19 GPM @ 19.5 PSI 17 GPM @ 15.6 PSI A1X A1X --
6.1m x 6.1m 71,9 L/Min @ 134,6 kPa 64,4 L/Min @ 107,8 kPa
Sloped Ceiling Approvals10
Maximum Area Minimum Water Supply Requirements
of Coverage9,10 Single Sprinkler Two or More UL5ULC7NYC8
16’ X 16’ 18 GPM @ 17.5 PSI 13 GPM @ 9.1 PSI
4.9m X 4.9m 68,1 L/Min @ 120,7 kPa 49,2 L/Min @ 63,0 kPa A1X A1X --
Deflector Thread Nominal Overall
Style Size NPT K Factor11 Length Base Part Number3
1/2 inch 4.3 US 2.25 inch
Pendent (15mm) (6,2 metric) (57,2mm) 09530
AREAS OF COVERAGE4SAMPLE
Temperature
Finish
A1X Escutcheon
Sprinkler Nominal Sprinkler
Ceiling Temperature at Sprinkler
Temperature Temperature Rating
Max. Ambient Max. Recommended Bulb
Classification (Fusing Point) Temp. Allowed1Ambient Temp.2Color
Ordinary 155°F (68°C) 135°F (46°C) 100°F (38°C) Red
Intermediate 175°F (79°C) 155°F (68°C) 150°F (65°C) Yellow
Sprinkler Finishes: Brass, Bright Brass, Chrome-Enloy®(patents pending), White(Paint), and Navajo
White(Paint)
1Based on National Fire Prevention and Control Administration, Contract No. 7-34860.
2 Based on NFPA-13. Other limits may apply depending on fire loading, sprinkler location, and other
Authority-Having-Jurisdiction requirements. Refer to specific installation standards.
MICROFAST®MODEL M-4
SMALL ORIFICE RESIDENTIAL
PENDENT SPRINKLER
OBSOLETE

Deflector - Brass UNS-C26000
Bulb - Glass, nominal 3mm diameter
Seal - Teflon®tape
Spring - Nickel Alloy
Screw - Brass UNS-C36000
Pip Cap - Copper UNS-C14500
ACCESSORIES:
Refer to "Sprinkler Accessories" section
ofthe
Viking Engineering and Design
Data
book for approved sprinkler
wrench and other accessories.
5. AVAILABILITY AND SERVICE
Viking sprinklers are available through a
network of domestic, Canadian, and in-
ternational distributors. See the Yellow
Pages of the telephone directory (listed
under "Sprinklers-Automatic-Fire") or
write to The Viking Corporation, Hast-
ings, Michigan, USA, Attention: Sales
Department.
Viking Technical Data may be found on
The Viking Corporation’s Web site,
located at http://www.vikingcorp.com.
The Web site may include a more recent
edition of this Technical Data page.
6. GUARANTEES
For details of warranty, refer to Viking’s
current list price schedule or contact Vi-
king directly.
7. INSTALLATION
WARNING: Viking sprinklers are
manufactured and tested to meet the
rigid requirements of approving agen-
cies. The sprinklers are designed to be
installed in accordance with recognized
installation standards. Deviation from
the standards or any alteration to the
sprinkler after it leaves the factory in-
cluding, but not limited to, painting, plat-
ing, coating, or modification, may render
the sprinkler inoperative and will auto-
matically nullify the approval and any
guaranteemadebyTheVikingCorpora-
tion.
A. Sprinklers are to be installed in ac-
cordance with the latest published
standardsoftheNationalFireProtec-
tion Association, Factory Mutual,
Loss Prevention Council, Assemblee
Pleniere, Verband der Sachver-
sicherer or other similar organiza-
tions,andalsowithprovisionsofgov-
ernmental codes, ordinances, and
standards whenever applicable. For
conditionsnot specificallycoveredby
the Standards, refer to the "Viking
Residential Installation Guide".
Final approval and acceptance of all
residential sprinkler installations
must be obtained from the Authority
Having Jurisdiction. Residential
sprinklers are special-service sprin-
klers for use in one- and two-family
dwellings, mobile homes, and resi-
dential portions of other occupancies
where allowed. The use of residen-
tial sprinklers may be limited due to
occupancy and hazard. The mini-
mum flow rate indicated for a listed
areaofcoveragemustbeprovidedat
the sprinkler. Therefore, the system
must be hydraulically calculated.
Refer to the Authority Having Juris-
diction prior to installation.
B. Sprinklers must be handled with care.
They must be stored in a cool, dry
place in their original container.
Never install sprinklers that have
been dropped or damaged in any
way. Never install any glass-bulb
sprinkler if the bulb is cracked or if
there is a loss of liquid from the bulb.
If a glass bulb lacks the appropriate
amount of fluid, it should be set aside
and returned to Viking (or an author-
izedVikingdistributor)foranalysisas
soon as possible. If the sprinkler is
notreturnedtoViking,itshouldbede-
stroyed immediately. Never install
sprinklers which have been exposed
to temperatures in excess of the
maximum ambient temperature al-
lowed. Such sprinklers should be de-
stroyed immediately.
C. Corrosion-resistant sprinklers must
beinstalledwhensubjecttocorrosive
atmospheres. Viking Microfast®
Model M-4 Residential Pendent
Sprinklers are not intended for use in
corrosive environments.
D. Use care when locating sprinklers
near fixtures that can generate heat.
Do not install sprinklers where they
will be exposed to temperatures that
exceed the maximum recommended
ambient temperature for the tem-
perature rating used.
E. Sprinklers must be protected from
mechanical damage. Adequate heat
mustbeprovidedwhensprinklersare
installed on wet-pipe systems.
F.TheMicrofast®ModelM-4Residential
Pendent Sprinkler must be installed
after the piping is in place to prevent
mechanical damage,and canonlybe
installed in the pendent position. Be-
fore installation, be sure to have the
appropriate sprinkler model and
style, with the correct orifice size,
temperature rating, and response
characteristics. Apply a small
amount of pipe-joint compound or
tape to the male threads only, taking
care not to allow a build-up of com-
pound inside the orifice. Install the
sprinkler on the piping using the spe-
cial sprinkler wrench only, while tak-
ing care not to damage the sprinkler
operating parts. DO NOT use the
sprinkler deflector to start or thread
the sprinkler into a fitting.
G. After installation, the entire sprinkler
systemmustbetestedinaccordance
with the recognized installation
standards. The test is applied after
sprinklerinstallationtoensurethatno
damagehasoccurredtothesprinkler
during shipment and installation, and
to make sure the unit has been prop-
erly tightened. If a thread leak should
occur, normally the unit must be re-
moved, new pipe-joint compound or
tape applied, and then reinstalled.
This is due to the fact that when the
joint seal leaks, the sealing com-
pound is washed out of the joint.
8. MAINTENANCE
NOTICE: The owner is responsible for
maintaining the fire-protection system
and devices in proper operating condi-
tion. For minimum maintenance and in-
spection requirements, refer to the Na-
tional Fire Protection Association pam-
phlet that describes care and mainte-
nance of sprinkler systems. In addition,
the Authority Having Jurisdiction may
have additional maintenance, testing,
and inspectionrequirements whichmust
be followed.
A. The sprinklers must be inspected on
a regular basis for signs of corrosion,
mechanical damage, obstructions,
paint, etc. The frequency of the in-
spections may vary due to corrosive
atmospheres, water supplies, and
activity around the device.
B. Sprinklers that have been field
painted, caulked, or mechanically
damaged must be replaced immedi-
ately. Sprinklers showing signs of
corrosion shall be tested and/or re-
placed immediately as required. Mi-
crofast®Model M-4 Residential Pen-
dent Sprinklers that are 20 years old
shall be tested and/or replaced im-
mediately as required. Never at-
tempttorepairorreassembleasprin-
kler. Sprinklers that have operated
cannot be reassembled or re-used,
but must be replaced. When replac-
ing sprinklers, use only new sprin-
klers.
C. The sprinkler discharge pattern is
critical for proper fire protection.
Nothing should be hung from, at-
tached to, or otherwise obstruct
June 4, 1998
Sprinkler 140 b
TECHNICAL DATA MICROFAST® MODEL M-4
SMALL ORIFICE RESIDENTIAL
PENDENT SPRINKLER
(continued on page 140 c)
OBSOLETE

the discharge pattern. All obstruc-
tions must be immediately removed
or, if necessary, additional sprinklers
installed.
D. When replacing existing sprinklers,
the system must be removed from
service. Refertotheappropriatesys-
tem description and/or valve instruc-
tions. Prior to removing the system
from service, notify all Authorities
Having Jurisdiction. Consideration
should be given to employment of a
fire patrol in the effected area.
1. Remove the system from service,
drain all water, and relieve all
pressure on the piping.
2.Usingthespecialsprinkler wrench,
remove the old sprinkler and in-
stall the new unit. Care must be
taken to ensure that the replace-
ment sprinkler is the proper model
and style, with the correct orifice
size, temperature rating, and re-
sponse characteristics. A fully
stocked sprinkler cabinet should
be provided for this purpose.
3. Place the system back in service
and secure all valves. Check and
repair all leaks.
E. Sprinkler systems that have been
subjectedatofiremustbereturnedto
service as soon as possible. The en-
tire system must be inspected for
damage and repaired or replaced as
necessary.Sprinklersthathavebeen
exposed to corrosive products of
combustion orhighambienttempera-
tures, but have not operated, should
be replaced. Refer to the Authority
Having Jurisdiction for minimum re-
placement requirements.
Sprinkler 140 c
June 4, 1998
TECHNICAL DATA MICROFAST®MODEL M-4
SMALL ORIFICE RESIDENTIAL
PENDENT SPRINKLER
Listed Areas of Coverage
correspond to areas measured
along ceiling slope
(for sloped ceiling installations,
actual floor coverage will be
less than listed area).
Refer to chart on
page 140 a
for listed areas
of coverage.
Maximum ceiling
slope = 6/12 (26.6°).
Figure 1 - Installation Instructions
Notes:
1. Actual installations may require multiple sprinklers. A single sprinkler installation has been
shown for clarity.
2. For "cathedral" ceiling applications, install sprinklers in a symmetrical mirror-image of FigureC.
3. For areas up to 16’ x 16’, with slopes between a 2/12 pitch (o°) and a 6/12 pitch (26.6°), the
"Minimum Water Supply Requirements" for the next largest "sloped" installation must be used.
Refer to approval chart on page 140 a.
OBSOLETE