Viking Microfast M-6 Instruction manual

1. PRODUCT NAME
VIKING Microfast® Model M-6
Low-Flow Residential Pendent
Sprinkler
Sprinkler Base Part No. 10149
Manufactured 1997 - Present
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: [phone]
e-mail: [e-mail]
3. PRODUCT DESCRIPTION
The Viking Microfast® Model M-6, Low-
Flow Residential Pendent Sprinkler is a
small, high-sensitivity, glass-bulb resi-
dential spray sprinkler. The sprinkler is
available in several finishes, with tem-
perature ratings to meet varying design
requirements. The orifice design, with a
K Factor of 3.1, allows efficient use of
available water supplies for the hydrau-
lically designed fire-protection system.
The small, rugged 3mm glass bulb and
special deflector combine speed of op-
eration and area of coverage to meet
residential sprinkler standards while
being aesthetically pleasing. The sprin-
kler is listed for use below smooth, flat,
horizontal ceilings only. During fire con-
ditions, 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 (page 150 c) 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 hydrostaticallyto500PSI
(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
Orifice Size: Nominal 3/8"
K Factor: 3.1 (4,5 Metric*)
*See Footnote 8 on approval chart
(page 150 c).
SPRINKLER MATERIALS:
Frame - Brass castings
UNS-C84400
Deflector - Copper UNS-C19500
Bulb - Glass
Nominal 3mm diameter
Seal - Teflon®tape
Spring - Nickel alloy
Screw - Brass UNS-C36000
Pip Cap - Copper UNS-C14500
ACCESSORIES:
Sprinkler Wrench
Standard: Part No. 05000CM
Recessed: Part No. 07398W
Refer to "Sprinkler Accessories" for es-
cutcheons.
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 price schedule or contact Viking
directly.
7. INSTALLATION
WARNING: Viking sprinklers are manu-
factured and tested to meet the rigid
requirements of approving agencies.
The sprinklers are designed to be in-
stalled 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
guaranteemadeby TheVikingCorpora-
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
conditionsnotspecifically coveredby
the standards, refer to the "Viking
Residential Installation Guide". Fi-
nal approval and acceptance of all
residential sprinkler installations
must be obtained from the Author-
ity Having Jurisdiction. Residen-
tial sprinklers are special service
sprinklers for use in one- and two-
family dwellings, mobile homes, and
residentialportionsofotheroccupan-
cies where allowed. The use of resi-
dential pendent sprinklers may be
limiteddueto occupancyandhazard.
Theminimumflowrateindicatedfora
listed area of coverage must be pro-
vided at the sprinkler. Therefore, the
system must be hydraulically calcu-
lated. Refer to the Authority Having
Jurisdiction 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-
ized distributor) for analysis as soon
as possible. If the sprinkler is not re-
turned to Viking, it should be de-
stroyed immediately. Never install
sprinklers which have been exposed
to temperatures in excess of maxi-
mum ambient temperature allowed.
Sprinkler 150 a
Replaces sprinkler page 150 a-c, dated August 29, 1997
(updated approved finish and escutcheon lists).
April 9, 1998
Form No. F_ 082197
Units of measure in parentheses may be approximations.
TECHNICAL DATA Microfast®MODEL M-6
LOW-FLOW RESIDENTIAL
PENDENT SPRINKLER
OBSOLETE

Such sprinklers should be destroyed
immediately.
C. Corrosion-resistant sprinklers must
beinstalledwhensubjecttocorrosive
atmospheres. Viking Microfast®
Residential Pendent Sprinklers are
not intended for use in corrosive en-
vironments.
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. The Microfast®Model M-6 Low-Flow
Residential Pendent Sprinkler must
be installed after the piping is in place
to prevent mechanical damage, and
must be installed in the pendent po-
sition. Beforeinstallation,besurethe
sprinkler is the appropriate model
and style, and has the proper orifice
size, temperature rating, and re-
sponse characteristics. Apply a
smallamountofpipe-jointcompound
or tape to the male threads only, tak-
ing care not to allow a build-up of
compound inside the orifice. Install
the sprinkler on the piping using the
special sprinkler wrench only, while
taking care not to damage the sprin-
kler 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
duringshipmentand 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 inspectionrequirementswhichmust
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® Residential Sprinklers that
are 20 years old shall be tested
and/or replaced immediately as re-
quired. Never attempt to repair or re-
assemble a sprinkler. Sprinklers that
have operated cannot be reassem-
bled or re-used, but must be re-
placed. When replacing sprinklers,
use only new sprinklers with identical
performance characteristics.
C. The sprinkler discharge pattern is
critical for proper fire protection.
Nothing should be hung from, at-
tached to, or otherwise obstruct
the discharge pattern of the sprin-
kler. All obstructions must be imme-
diately removed or, if necessary, ad-
ditional sprinklers installed.
D. When replacing existing sprinklers,
the system must be removed from
service. Refertothe appropriatesys-
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.Usingthe special sprinklerwrench,
remove the old sprinkler and in-
stall the new unit. Care must be
taken to ensure that the replace-
mentsprinkler is the proper model
and style, and has the appropriate
orifice size, temperature rating,
and response characteristics. A
fully stocked sprinkler cabinet
should be provided for this pur-
pose.
3. Place the system back in service
and secure all valves. Check and
repair all leaks.
E. Sprinkler systems that have been
subjectedtoafiremustbereturnedto
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.
April 9, 1998
Sprinkler 150 b
TECHNICAL DATA Microfast®MODEL M-6
LOW-FLOW RESIDENTIAL
PENDENT SPRINKLER
OBSOLETE

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Sprinkler 150 c
April 9, 1998
TECHNICAL DATA
APPROVED
ESCUTCHEONS
X - Standard surface or F-1 Adjustable
Escutcheon9, or recessed with
E-1 Recessed Escutcheon
APPROVED
FINISHES
1 - Brass, Bright Brass, Chrome-Enloy®,
White (Paint), and Navajo White (Paint)
APPROVED
TEMPERATURES
A - 155°F (68°C) and 175°F (79°C)
Sprinkler Nominal Sprinkler Ceiling Temperature at Sprinkler
Temperature Temperature Rating Maximum Ambient Maximum Recommended Bulb
Classification (Fusing Point) Temperature Allowed1Ambient Temperature2 Color
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.
2Based on NFPA-13. Other limits may apply depending on fire loading, sprinkler location, and other Authority-Having-Jurisdiction requirements.
Refer to specific installation standards.
Deflector Thread Nominal Nominal Overall
Style Size NPT Orifice K Factor8Length Base Part Number3
Pendent 1/2 inch 3/8 inch 3.1 US 2.25 inch
FOOTNOTES
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 manufacturer for any additional
approvals.
5Listing is for residential occupancies with smooth, flat, horizontal ceilings. See Footnotes 6 and 7.
6For areas of coverage smaller than shown, use the "Minimum Water Supply Requirement" for the next largest area listed. Flows and pressures listed are
per sprinkler.
7Listed by Underwriters Laboratories Inc. for use in Canada.
8Metric 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.
9The 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.
KEY
AREAS OF COVERAGE4Temperature
Finish
A1X Escutcheon
Smooth, Flat, Horizontal Ceilings
Maximum Area Minimum Water Supply Requirements Approvals4
of Coverage6
One Sprinkler Two or More UL5C-UL7FM NYC
Width Length
12 ft. x 12 ft. 9.0 GPM @ 8.4 PSI 8.5 GPM @ 7.5 PSI
3,7 m x 3,7 m 34,1 L/Min @ 57,4 kPa 32,2 L/Min @ 51,2 kPa
14 ft. x 14 ft. 10.0 GPM @ 10.4 PSI 8.5 GPM @ 7.5 PSI
4,3 m x 4,3 m 37,9 L/Min @ 70,9 kPa 32,2 L/Min @ 51,2 kPa
16 ft. x 16 ft. 11.0 GPM @ 12.6 PSI 9.5 GPM @ 9.4 PSI
4,9 m x 4,9 m 41,6 L/Min @ 85,5 kPa 36,0 L/Min @ 64,0 kPa
18 ft. x 18 ft. 13.0 GPM @ 17.6 PSI 11.0 GPM @ 12.6 PSI
5,5 m x 5,5 m 49,2 L/Min @ 119,5 kPa 41,6 L/Min @ 85,5 kPa
20 ft. x 20 ft. 14.0 GPM @ 20.4 PSI 14.0 GPM @ 20.4 PSI
6,1 m x 6,1 m 53,0 L/Min @ 138,7 kPa 53,0 L/Min @ 138,7 kPa
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Microfast®MODEL M-6
LOW-FLOW RESIDENTIAL
PENDENT SPRINKLER
Units of measure in parentheses may be approximations.
OBSOLETE