Viking Microfast M-5 Instruction manual

1. PRODUCT NAME
VikingMicrofast®ModelM-5Residential
Pendent Sprinkler, 5.5 K-factor
•Base Part Number 10050
•Available since 1997.
2. MANUFACTURER
The Viking Corporation
210 N. Industrial Park Road
Hastings, Michigan 49058, U.S.A.
Telephone:[phone]
[phone]
Fax:[phone]
e-mail: [email protected]m
3. PRODUCT DESCRIPTION
The Viking Microfast ® Model M-5 Resi-
dential Pendent Sprinkler is a small,
high-sensitivity, glass-bulb spray sprin-
kler. The sprinkler is available in several
finishesandtemperatureratingstomeet
design requirements.
The sprinkler is listed for use below
smooth, flat, horizontal ceilings and
ceilings with slopes up to and includ-
ing a 6/12 (26.6°) pitch, with spacings
up to 20’ x 20’.
The sprinkler design, with a K-factor of
5.5, allows efficient use of available wa-
ter supplies for the hydraulically de-
signed fire-protection system. The
small, rugged 3 mm glass bulb and spe-
cial deflector combine speed of opera-
tion and areas of coverage to meet the
residential sprinkler standards. During
fire conditions, the heat-sensitive liquid
in the glass bulb expands, causing the
bulb to shatter, releasing the pip-cap
and sealing 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
LISTINGS AND APPROVALS
Refer to Table 1 on pages 141 c and
Table 2 on page 141 d.
Ratedto175psi(1207kPa)waterwork-
ing pressure.
Factory tested pneumatically to 95 psi
(655 kPa).
See approval charts for minimum water
supply requirements and maximum
areas of coverage.
Glass-bulb fluid temperature rated to
-65 °F (-55 °C).
Spring: USA Patent No. 4,570,720
Seepages141cand141dfortempera-
ture ratings.
ThreadSize:Nominal1/2"(15mm)NPT
K-factor: 5.5 U.S. (7,9 metric*)
* Metric K-factor shown is for use when pressure is
measuredinkPa.Whenpressure is measured in
BAR, multiply the metric K-factor shown by 10.0.
SPRINKLER MATERIALS
Frame: Brass Castings UNS-C84400
Deflector: Brass UNS-C26000
Bulb: Glass, nominal 3 mm diameter
Seal: Teflon®Tape
Spring: Nickel Alloy
Screw: Brass UNS-C36000
Pip Cap: Copper UNS-C11000 and
Stainless Steel UNS-S30400
SPRINKLER FINISHES
Bright Brass, Chrome-Enloy ®(patents
pending), White (Paint), and Navajo
White (Paint)
ACCESSORIES
Refer to the “SPRINKLER ACCES-
SORIES” section of the Viking Engi-
neering and Design Databook for tech-
nical data on approved sprinkler wrench
and other accessories.
5. AVAILABILITY AND SERVICE
Vikingsprinklers are available through a
network of domestic, Canadian, and in-
ternational distributors. See the Yellow
Pagesofthetelephonedirectoryforalo-
cal distributor (listed under “Sprin-
klers-Automatic-Fire”)orcontactViking.
Viking Technical Data may be found on
The Viking Corporation’s Web site 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
currentlistpricescheduleorcontactThe
Viking Corporation directly.
7. INSTALLATION
WARNING:Viking sprinklers are manu-
factured and tested to meet the rigid re-
quirements of the approving agency.
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,ormodification,mayrender
the sprinkler inoperative and will auto-
matically nullify the approval and any
guaranteemadebyTheVikingCorpora-
tion.
A.Sprinklersare tobeinstalledinaccor-
dance with the latest published stan-
dards of the National Fire Protection
Association, Factory Mutual, Loss
Prevention Council, Assemblee
Pleniere, Verband der
Sachversicherer or other similar or-
ganizations,andalso with provisions
of governmental codes, ordinances,
and standards whenever applicable.
For conditions not specifically cov-
ered by the standards, refer to the
“Viking Residential Installation
Guide”. Final approval and accep-
tance of all Residential Sprinkler In-
stallationsmust be obtained fromthe
Authority Having Jurisdiction. Resi-
dential sprinklers are special-service
sprinklers for use in one- and
two-family dwellings, mobile homes,
and residential portions of other oc-
cupancies, where allowed. The use
of residential sprinklers may be lim-
ited due to occupancy and hazard.
The minimum flow rate indicated for
a listed area of coverage must be
provided at the sprinkler. Therefore,
thesystem must be hydraulicallycal-
culated. Refer to the Authority Hav-
ing 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
amountof fluid, itshouldbe set aside
and returned to Viking (or an autho-
rized Viking distributor) for analysis
assoonaspossible.Ifthe sprinkleris
not returned to Viking, it should be
destroyed immediately. Never install
sprinklers which have been exposed
to temperatures in excess of maxi-
Sprinkler 141 a
May 27, 1999
FormNo.F_060697Replaces sprinkler page 141 a-e, dated May 21, 1998
(revised pip-cap materials).
Units of measure in parentheses may be approximations.
TECHNICAL DATAMicrofast®MODEL M-5
RESIDENTIAL PENDENT
SPRINKLER, 5.5 K-FACTOR
OBSOLETE

mum ambient temperature allowed.
Such sprinklers should be destroyed
immediately.
C. Corrosion-resistant sprinklers must
be installed when subject to corro-
sive atmospheres. Viking Microfast ®
Model M-5 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 temper-
ature rating used.
E. Sprinklers must be protected from
mechanical damage. Adequate heat
must be provided when sprinklers
are installed on wet-pipe systems.
F.Beforeinstalling, besurethesprinkler
is the appropriate model and style,
with the proper orifice size, tempera-
ture rating, and response character-
istics. The Microfast®Model M-5
Residential Pendent Sprinkler must
beinstalledafter thepipingisinplace
to prevent mechanical damage, and
mustbeinstalled inthependentposi-
tion.
NOTE:Install residential pendent
sprinklers with deflectors between 1"
and 4" (25 mm and 102 mm) below
the ceiling [between 3/4" and 4" (19
mm and 102 mm) below the ceiling
for recessed].
Apply a small amount of pipe-joint
compound or tape to the male
threads only, taking care not to allow
abuild-upofcompoundinsidethe or-
ifice.Installthesprinkleronthepiping
using the special sprinkler wrench
only,while taking carenot todamage
the sprinkler operating parts. DO
NOT use the sprinkler deflector to
start or thread the sprinkler into a fit-
ting.
G. After installation, the entire sprinkler
systemmustbetestedinaccordance
with the recognized installation stan-
dards. The test is applied after sprin-
kler installation to ensure that no
damagehasoccurredtothesprinkler
during shipment and installation, and
to make sure the unit has been prop-
erlytightened.Ifathreadleakoccurs,
normally the unit must be removed,
new pipe-joint compound or tape ap-
plied, and then reinstalled. This is
duetothefactthatwhenthejointseal
leaks, the sealing compound 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’s
pamphlet that describes care and main-
tenance of sprinkler systems. In addi-
tion, the Authority Having Jurisdiction
may have additional maintenance, test-
ing, and inspection requirements that
must be followed.
A. Sprinklers must be inspected on a
regular basis for corrosion, mechani-
cal damage, obstructions, paint, etc.
The frequency of the inspections
may vary due to corrosive atmo-
spheres, water supplies, and activity
around the device.
B. Sprinklers that have been field
painted or mechanically damaged
must be replaced immediately.
Sprinklers showing signs of corro-
sion shall be tested and/or replaced
immediately as required. Residential
sprinklers that are 20 years old shall
be tested and/or replaced 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.
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. All obstructions
must be immediately removed or, if
necessary, additional sprinklers in-
stalled.
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 affected area.
1. Remove the system form service ,
drain all water, and relieve all
pressure on the piping.
2. Using the special sprinkler
wrench, turn the unit counter-
clockwiseto removetheoldsprin-
kler from the piping in which it is
installed.
3. Install the new unit. Care must be
taken to ensure that the replace-
mentsprinkleristhepropermodel
andstyle,with theappropriate ori-
fice size, temperature rating, and
response characteristics. Ap-
provalsandlistingsofthereplace-
ment sprinkler should match
those for the existing sprinkler. A
fully stocked spare sprinkler cabi-
net should be provided for this
purpose.
4. Place the system back in service
and secure all valves. Check and
repair all leaks.
E. Sprinkler systems that have been
subjected to a fire must be returned
to service as soon as possible. The
entire system must be inspected for
damage,andrepaired orreplacedas
necessary. Sprinklers that have
been exposed to corrosive products
of combustion or high ambient tem-
peratures, but have not operated,
should be replaced. Refer to the Au-
thority Having Jurisdiction for mini-
mum replacement requirements.
May 27, 1999
Sprinkler 141 b
TECHNICAL DATAMicrofast®MODEL M-5
RESIDENTIAL PENDENT
SPRINKLER, 5.5 K-FACTOR
OBSOLETE

Sprinkler 141 c
May 27, 1999
TECHNICAL DATAMicrofast®MODEL M-5
RESIDENTIAL PENDENT
SPRINKLER, 5.5 K-FACTOR
Sprinkler
Temperature
Classification
Nominal Sprinkler
Temperature Rating
(Fusing Point)
Ceiling Temperature at SprinklerBulb
Color
Maximum Ambient
Temperature Allowed1Maximum Recommended
Ambient Temperature 2
Ordinary155 °F (68 °C)135 °F (46 °C)100 °F (38 °C)Red
Intermediate175 °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)
Footnotes
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, an d other requirements of the Authority Having
Jurisdiction. Refer to specific installation standards.
Deflector StyleNPTThread SizeNominal K-FactorOverall LengthBase Part Number 3
InchmmUSmetric 9Inchmm
Pendent1/2155.57,92.2569,910050
Approval Chart
Microfast ®Model M-5
Residential Pendent Sprinkler, 5.5 K-Factor
Smooth, Flat, Horizontal Ceilings
Maximum Areas of Coverage 6,7
Width x LengthMinimum Water Supply RequirementsListings and Approvals 4
Single SprinklerTwo or More SprinklersUL 5C-UL8
12' x 12'
(3,7 m x 3,7 m)16.0 gpm @ 8.5 psi (60,6 L/min @ 58,6 kPa14.5 gpm @ 7.0 psi (54,9 L/min @ 48,3 kPaA1XA1X
14' x 14'
(4,3 m x 4,3 m)19.0 gpm @ 11.9 psi (71,9 L/min @ 82,0 kPa16.0 gpm @ 8.5 psi (60,6 L/min @ 58,6 kPaA1XA1X
16' x 16'
(4,9 m x 4,9 m)19.0 gpm @ 11.9 psi (71,9 L/min @ 82,0 kPa16.0 gpm @ 8.5 psi (60,6 L/min @ 58,6 kPaA1XA1X
18' x 18'
(5,5 m x 5,5 m)21.0 gpm @ 14.6 psi (79,5 L/min @ 100,7 kPa17.5 gpm @ 10.1 psi (66,2 L/min @ 69,6 kPaA1XA1X
20' x 20'
(6,1 m x 6,1 m)24.0 gpm @ 19.0 psi (90,8 L/min @ 131,0 kPa19.0 gpm @ 11.9 psi (71,9 L/min @ 82,0 kPaA1XA1X
Approved
Temperatures
A - 155 °F (68 °C) and 175 °F
(79 °C)
B - 155 °F (68 °C) only
C - 175 °F (79 °C) only
Approved Finishes
1 - Brass, Bright Brass,
Chrome-Enloy ®, White
(paint), and Navajo
White (paint)
Approved Escutcheons
X - Standard surface-mounted escutcheons or Microfast ®
Model F-1 Adjustable Escutcheon10, orrecessed with
the Micromatic ® Model E-1 Recessed Escutcheon
Footnotes
3Base part number shown. For complete part number, see price list.
4Thischartshowsthelistingsandapprovalsavailableatthetimeofprinting.Otherapprova lsareinprocess.Checkwiththe manufacturerfor
any additional approvals.
5Listingisforresidentialoccupancieswithsmooth,flat,horizontalceilingsandceili ngswithslopesuptoa6/12(26.6°)pitch. SeeFootnotes6,
7, and 8.
6Listed area of coverage measured along ceiling. Consult Figures 1 and 2 on page 141 e, and "Residential Installation Guide" paragraphs
that pertain to sprinklers with listings for both smooth, flat, horizontal, and sloped ceili ngs for installation details.
7Forareasofcoveragesmallerthanshown,usethe"MinimumWaterSupplyRequirement"forthenextlargerarealisted.Flowsandpressures
listed are per sprinkler.
8Listed by Underwriters Laboratories Inc. for use in Canada.
9MetricK-factorshownisforusewhenpressureismeasuredinkPa.WhenpressureismeasuredinBAR,multiplythemetric K-factorshown
by 10.0.
10TheMicrofast ®ModelF-1AdjustableEscutcheonisconsideredasurface-mountedescutcheonbecauseitdoesnotallowthefusibleelement
of the sprinkler to be recessed behind the face of the wall or ceiling.
NOTE: Install residential pendent sprinklers with deflectors between 1" and 4" (25 mm and 102 mm) below the ceiling [between 3/4" and 4"
(19 mm and 102 mm) below the ceiling for recessed]. Table 1
KEY
Temperature
Finish
A1XEscutcheon (if applicable)
OBSOLETE

Sprinkler 141 dMay 27, 1999
TECHNICAL DATAMicrofast®MODEL M-5
RESIDENTIAL PENDENT
SPRINKLER, 5.5 K-FACTOR
Sprinkler
Temperature
Classification
Nominal Sprinkler
Temperature Rating
(Fusing Point)
Ceiling Temperature at SprinklerBulb
Color
Maximum Ambient
Temperature Allowed 1Maximum Recommended
Ambient Temperature 2
Ordinary155 °F (68 °C)135 °F (46 °C)100 °F (38 °C)Red
Intermediate175 °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)
Footnotes
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, an d other requirements of the Authority Having
Jurisdiction. Refer to specific installation standards.
Deflector StyleNPT Thread SizeNominal OrificeNominal K-FactorOverall LengthBase Part
Number 3
InchmmInchmmUSmetric 9Inchmm
Pendent1/2151/2155.57,92.2569,910050
Approval Chart
Microfast ®Model M-5
Residential Pendent Sprinkler, 5.5 K-Factor
(Refer to Figures 1 and 2 on page 141 e)
Sloped Ceilings [with slopes up to and including a 6/12 (26.6°) pitch]
Maximum Areas of Coverage 6,7
Width x LengthMinimum Water Supply RequirementsListings and Approvals 4
Single SprinklerTwo or More SprinklersUL 5C-UL8
12' x 12'
(3,7 m x 3,7 m)20.0 gpm @ 13.2 psi (75,7 L/min @ 91,0 kPa16.0 gpm @ 8.5 psi (60,6 L/min @ 58,6 kPaB1XB1X
12' x 12'
(3,7 m x 3,7 m)21.0 gpm @ 14.6 psi (79,5 L/min @ 100,7 kPa16.0 gpm @ 8.5 psi (60,6 L/min @ 58,6 kPaC1XC1X
14' x 14'
(4,3 m x 4,3 m)20.0 gpm @ 13.2 psi (75,7 L/min @ 91,0 kPa16.0 gpm @ 8.5 psi (60,6 L/min @ 58,6 kPaB1XB1X
14' x 14'
(4,3 m x 4,3 m)21.0 gpm @ 14.6 psi (79,5 L/min @ 100,7 kPa16.0 gpm @ 8.5 psi (60,6 L/min @ 58,6 kPaC1XC1X
16' x 16'
(4,9 m x 4,9 m)20.0 gpm @ 13.2 psi (75,7 L/min @ 91,0 kPa16.0 gpm @ 8.5 psi (60,6 L/min @ 58,6 kPaB1XB1X
16' x 16'
(4,9 m x 4,9 m)21.0 gpm @ 14.6 psi (79,5 L/min @ 100,7 kPa16.0 gpm @ 8.5 psi (60,6 L/min @ 58,6 kPaC1XC1X
18' x 18'
(5,5 m x 5,5 m)22.0 gpm @ 16.0 psi (83,3 L/min @ 110,3 kPa18.0 gpm @ 10.7 psi (68,1 L/min @ 73,8 kPaA1XA1X
20' x 20'
(6,1 m x 6,1 m)28.0 gpm @ 25.9 psi (106,0 L/min @ 178,6 kPa24.0 gpm @ 19.0 psi (90,8 L/min @ 131,0 kPaA1XA1X
Approved Temperatures
A - 155 °F (68 °C) and 175 °F (79 °C )
B - 155 °F (68 °C) only
C - 175 °F (79 °C) only
Approved Finishes
1 - Brass, Bright Brass, Chrome-
Enloy ®, White (paint), and Na-
vajo White (paint)
Approved Escutcheons
X - Standard surface-mounted escutcheons or Microfast®
Model F-1 Adjustable Escutcheon 10 , orrecessed withthe
Micromatic ® Model E-1 Adjustable Recessed Escutcheon
Footnotes
3Base part number shown.For complete part number, see price list.
4Thischartshowsthelistingsandapprovalsavailableatthetimeofprinting.Otherapprovalsareinprocess.Checkwiththemanufacturerforany
additional approvals.
5Listingisforresidentialoccupancieswithsmooth,flat,horizontalceilingsandceilingswithslopesuptoa6/12(26.6°)pitch. SeeFootnotes6,
7, and 8.
6Listed area of coverage measured along ceiling. Consult Figures 1 and 2 on page 141 e, and " Residential Installation Guide" paragraphs
that pertain to sprinklers with listings for both smooth, flat, horizontal, and sloped ceilings for installation details.
7Forareasofcoveragesmallerthanshown,usethe"MinimumWaterSupplyRequirement"forthenextlargerarealisted.Flowsandpressures
listed are per sprinkler.
8Listed by Underwriters Laboratories Inc. for use in Canada.
9MetricK-factorshownisforusewhenpressureismeasuredinkPa.WhenpressureismeasuredinBAR,multiplythemetricK-factorshown
by 10.0.
10The Model F-1 Adjustable Escutcheon is considered a surface-mounted escutcheon because itdoes not allow the fusible element of the
sprinkler to be recessed behind the face of the wall or ceiling.
NOTE:Installresidentialpendentsprinklerswithdeflectorsbetween1"and4"(25mmand102mm)belowtheceiling[between3/4"and4"
(19 mm and 102 mm) below the ceiling for recessed]. Table 2
KEY
Temperature
Finish
A1XEscutcheon (if applicable)
OBSOLETE

Figure 1: Installation Guidelines
Figure 2: Installation Guidelines - Lofts
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 Figure 1.
3. For areas of coverage smaller than the listed areas (up to 20’ x 20’), with slopes between a 0 /12 pitch (0°) and a 6/12
(26.6°) pitch, use the “Minimum Water Supply Requirements” for the next larger listed “sloped” spacing. Refer to t he
approval chart on page 141 d.
Sprinkler 141 e
May 27, 1999
TECHNICAL DATAMicrofast®MODEL M-5
RESIDENTIAL PENDENT
SPRINKLER, 5.5 K-FACTOR
Listed Areas of Coverage
correspond to areas measured
along ceiling slope.
(For sloped ceiling installations,
actual floor coverage will be
less than listed area.)
Maximum ceiling
slope = 6/12 (26.6°).
Refer to chart on
page 141 d
for listed areas
of coverage.
Minimum 8" lintel for loft / upper
level (cathedral) applications.
Maximum 6/12
(26.6°) pitch.
Refer to approval
chart on page 141 d.
OBSOLETE