Viking VK4621 Instruction manual

STANDARD AND
QUICK RESPONSE
CONCEALED PENDENT
SPRINKLER VK4621 (K5.6)
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: [phone] Technical Services: 877-384-5464 Fax: [phone] Email: [email protected]
Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com
Page 1 of 8
Form No. F_092121 Rev 01 April 2023
1. DESCRIPTION
Viking Standard and Quick Response Concealed Pendent Sprinkler VK4621 is a
small thermosensitive, glass-bulb sprinkler designed for installation on concealed
pipe systems where the appearance of a smooth ceiling is desired. The low-profile
cover assemblies provide up to ½” (13 mm) of vertical adjustment.
Features:
• K5.6 (80.6 metric).
• Quick response glass bulb operating element.
• Integral threaded adapter cup accepts push-on or thread-on cover plates.
• Low-profile, small diameter, removeable cover plates offer almost flush
appearance upon installation and allow ease of maintenance.
• Protective cap prevents damage during installation and finishing and keeps
errant overspray from coating internal parts.
• Various finishes available to meet design requirements.
• Optional Electroless Nickel PTFE (ENT) coating provides corrosion resistance
(see Approval Chart).
2. LISTINGS AND APPROVALS
cULus Listed: Category VNIV
FM Approved: Class 2015
Also approved for use in FM Approved vacuum dry sprinkler systems with
a maximum supervisory vacuum pressure of -3 psi (-207mbar)
Refer to the Approval Charts and Design Criteria on for cULus Listing requirements
that must be followed.
3. TECHNICAL DATA
Specifications:
Minimum Operating Pressure: 7 psi (0.5 bar)
Maximum Working Pressure: FM - 175 psi (12 bar). UL - 250 psi (17.2 bar)
Factory tested hydrostatically to 500 psi (34.5 bar).
Thread size: 1/2” NPT or BSPT
Nominal K-Factor: 5.6 U.S. (80.6 metric*)
Glass-bulb fluid temperature rated to -65 °F (-55 °C)
* Metric K-factor measurement shown is in Bar. When pressure is measured in kPa, divide the metric K-factor shown by 10.0.
Material Standards:
Sprinkler body: QM Brass or DZR Brass
Deflector: Phosphor Bronze UNS-C51000
Deflector pins: Stainless steel UNS-S43000
Pip cap: Copper UNS-C11000
Pip cap insert: stainless steel UNS-S30400
Pip cap T-hinge ring: Stainless steel UNS-S31600
Compression screw: UNS-C36000
Belleville spring sealing assembly: Nickel alloy, coated on both sides with PTFE tape
Cover adapter: Cold rolled steel JIS G3141 and carbon steel UNS-G10100 (per JIS G3141)
Shipping cap: High density polyethylene
Cover Plate Materials:
Cover plate assembly: Copper UNS-C11000 and brass UNS-C26800 or stainless steel UNS-S30400
Spring: Beryllium nickel
Solder: Eutectic
Ordering Information: Refer to Tables 1 and 2.
4. INSTALLATION
Refer to appropriate NFPA Installation Standards and installation instructions in this document.

Replaces Form No. F_092121 Rev 22.1
(Replaced wrench 24339 with 23143; replaced protective cap.)

STANDARD AND
QUICK RESPONSE
CONCEALED PENDENT
SPRINKLER VK4621 (K5.6)
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: [phone] Technical Services: 877-384-5464 Fax: [phone] Email: [email protected]
Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com
Page 2 of 8
Form No. F_092121 Rev 01 April 2023
5. OPERATION
During fire conditions, when the temperature around the sprinkler approaches its operating temperature, the cover plate detaches,
releasing the deflector. Continued heating of the exposed sprinkler causes the heat-sensitive liquid in the glass bulb to expand,
causing the glass to shatter, releasing the pip cap and sealing spring assembly. Water flowing through the sprinkler orifice strikes
the deflector, forming a uniform spray pattern over a specific area of coverage determined by the water supply pressure at the
sprinkler to extinguish or control the fire.
6. INSPECTIONS, TESTS AND MAINTENANCE
Refer to NFPA 25 for Inspection, Testing and Maintenance requirements.
7. AVAILABILITY
Viking Sprinklers are available through a network of domestic and international distributors. See The Viking Corporation web site
for the closest distributor contact The Viking Corporation.
8. GUARANTEE
For details of warranty, refer to Viking’s current list price schedule or contact Viking directly.
TABLE 1: ORDERING INFORMATION
Instructions:
(1) Select a Sprinkler Base Part Number
(2) Add the suffix for the desired Finish
(3) Add the suffix for the desired Sprinkler Temperature Rating
(4) Order a cover plate (refer to Table 2)
Example:
24682AE = 200 °F (93 °C) Temperature Rated Sprinkler with a standard Brass finish.
Sprinkler
Base Part
Number
Size 1: Finishes 2: Temperature Ratings
NPT BSPT Description Suffix1
Sprinkler
Temperature
Classification
Nominal
Rating
Bulb
Color
Max. Ambient
Ceiling Temperature2Suffix
24682 1/2” -- Brass A Ordinary 155 °F (68 °C) Red 100 °F (38 °C) B
22962 -- 1/2” ENT 3,4,6 JN
Intermediate 175 °F (79 °C) Yellow 150 °F (65 °C) D
Intermediate 200 °F (93 °C) Green 150 °F (65 °C) E
Accessories
Part number Description
231435Installation wrench5,8
14417 Concealed cover plate installer tool (available since 2007)7
14867 Large concealed cover plate installer tool (available since 2007)7
01731A Sprinkler cabinet; holds up to 6 sprinklers (available since 1971)
Footnotes
1. Where a dash (-) is shown in the Finish suffix designation, insert the desired Temperature Rating suffix. See example above.
2. Based on NFPA 13, NFPA 13R, and NFPA 13D. Other limits may apply, depending on fire loading, sprinkler location, and other requirements of the Authority Having
Jurisdiction. Refer to specific installation standards.
3. UL Listed as corrosion resistant.
4. The corrosion resistant coatings have passed the standard corrosion test required by the approving agencies indicated in the Approval Chart. These tests cannot and
do not represent all possible corrosive environments. Prior to installation, verify through the end-user that the coatings are compatible with or suitable for the proposed
environment. For automatic sprinklers, the ENT coating is applied to all exposed exterior surfaces, including the waterway.
5. Requires a 1/2” ratchet which is not available from Viking.
6. FM Approved as a decorative finish.
7. The installer tool is for push-on style cover plates only.
8. The installation wrench is intended to be used for a maximum of 500 sprinkler installations at a maximum torque of 14 ft-lbs (19 Nm).

STANDARD AND
QUICK RESPONSE
CONCEALED PENDENT
SPRINKLER VK4621 (K5.6)
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: [phone] Technical Services: 877-384-5464 Fax: [phone] Email: [email protected]
Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com
Page 3 of 8
Form No. F_092121 Rev 01 April 2023
TABLE 2: COVER PLATE ORDERING INFORMATION
Instructions:
(1) Select a Cover Plate Base Part Number
(2) Add the suffix for the desired Finish
(3) Add the suffix for the required Cover Plate Nominal Rating.
Example:
23190MC/W = 165 °F (74 °C) Temperature Rated 2-3/4” (70 mm) diameter Round Cover Plate with a Painted White finish.
1: Select a Cover Plate Base Part Number3
2: Select a Finish
Thread-On Style Push-On Style
Base Part
Number
Size
Inch (mm) Type Base Part
Number
Size
Inch (mm) Type Description Suffix5
23190 2-3/4 (70) Round 23447 2-3/4 (70) Round Polished Chrome F
23174 3-5/16 (84) Round 23463 3-5/16 (84) Round Brushed Chrome F-/B
23179 3-5/16 (84) Square 23482 3-5/16 (84) Square Bright Brass B
2319342-3/4 (70) Stainless
Steel Round 23455 2-3/4 (70) Stainless
Steel Round
Antique Brass B-/A
Brushed Brass B-/B
2318343-5/16 (84) Stainless
Steel Round 23473 3-5/16 (84) Stainless
Steel Round
Brushed Copper E-/B
Painted White M-/W
23174-/CR 3-5/16 (84) Clean Room 23463-/CR 3-5/16 (84) Clean Room Painted Ivory M-/I
23183-/CR 3-5/16 (84)
Stainless
Steel Round
Clean Room
23473-/CR 3-5/16 (84)
Stainless
Steel Round
Clean Room
Painted Black M-/B
3: Temperature Rating Matrix1,2
Cover Plate Nominal
Rating (Required)
Temperature
Classification Sprinkler Nominal Rating Sprinkler Maximum Ambient
Ceiling Temperature2Suffix
UL: 135 °F (57 °C)
FM: 139 °F (59 °C) Ordinary 155 °F (68 °C) 100 °F (38 °C) A
165 °F (74 °C) Intermediate 175 °F (79 °C) 150 °F (65 °C) C
165 °F (74 °C) Intermediate 200 °F (93 °C) 150 °F (65 °C) C
Footnotes
1. The sprinkler temperature rating is stamped on the deflector.
2. Based on NFPA-13. Other limits may apply, depending on fire loading, sprinkler location, and other requirements of the Authority Having Jurisdiction. Refer to specific
installation standards.
3. Part number shown is the base part number. For complete part number, refer to current Viking price list schedule.
4. Stainless Steel versions are not available with any finishes or paint.
5. Where a dash (-) is shown in the Finish suffix designation, insert the desired Temperature Rating suffix. See example above.

STANDARD AND
QUICK RESPONSE
CONCEALED PENDENT
SPRINKLER VK4621 (K5.6)
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: [phone] Technical Services: 877-384-5464 Fax: [phone] Email: [email protected]
Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com
Page 4 of 8
Form No. F_092121 Rev 01 April 2023
Approval Chart
Concealed Pendent Sprinkler VK4621
Sprinkler
Base Part
No.1
SIN
Thread Size Nominal K-factor Maximum
Water Working Pressure
Listings and Approvals3
(Refer also to Design Criteria)
NPT BSPT U.S. metric2cULus FM cULus4FM
Standard Response Applications
24682A VK4621 1/2” -- 5.6 80.6 -- 175 psi (12 bar) -- AV1, BX1, AS2, BT2
24682JN7,8 VK4621 1/2” -- 5.6 80.6 -- 175 psi (12 bar) -- AV1, BX1, AS2, BT2
22962A VK4621 -- 1/2” 5.6 80.6 -- 175 psi (12 bar) -- AV1, BX1, AS2, BT2
22962JN7,8 VK4621 -- 1/2” 5.6 80.6 -- 175 psi (12 bar) -- AV1, BX1, AS2, BT2
Quick Response Applications
24682A VK4621 1/2” -- 5.6 80.6 250 psi (17.2 bar) -- AV1, BX1, AS2, BT2, AY3, BZ3 --
24682JN7,8 VK4621 1/2” -- 5.6 80.6 250 psi (17.2 bar) -- AV1, BX1, AS2, BT2, AY3, BZ3 --
22962A VK4621 -- 1/2” 5.6 80.6 250 psi (17.2 bar) -- AV1, BX1, AS2, BT2, AY3, BZ3 --
22962JN7,8 VK4621 -- 1/2” 5.6 80.6 250 psi (17.2 bar) -- AV1, BX1, AS2, BT2, AY3, BZ3 --
Sprinkler Temperature Ratings Cover Plate Assembly Temperature Ratings5Cover Plate Assembly
Finishes
A = 155 °F (68 °C)
B = 175 °F (79 °C) and 200 °F (93 °C)
S - 135 °F (57 °C) cULus Listed or 139 °F (59 °C) FM Approved Stainless Steel
cover 23193 and 23455, or 23183 and 23473 (large diameter)
T - 165 °F (74 °C) Stainless Steel cover 23193 and 23455 or 23183 and 23473
(large diameter)
V - 135 °F (57 °C) cULus Listed or 139 °F (59 °C) FM Approved cover 23190
and 23447, 23174 and 23463 (large diameter), or 23179 and 23482 (square
cover plate)
X - 165 °F (74 °C) cover 23190 and 23447, or 23174 and 23463 (large diameter)
Y - 135 °F (57 °C) Clean Room Cover 23174A-/CR and 23463A-/CR or
135 °F (57 °C) Stainless Steel Clean Room Cover 23183A/CR and
23473A/CR
Z - 165 °F (74 °C) Clean Room Cover 23174C-/CR and 23463C-/CR
1 - Polished Chrome,
Brushed Chrome,
Bright Brass, Antique
Brass, Brushed Brass,
Brushed Copper,
Painted6White,
Painted6Ivory, or
Painted6Black
2 - Stainless Steel
3 - Polished Chrome,
Painted White, Painted
Ivory, or Painted Black
Footnotes
1. Part number shown is the base part number. For complete part number, refer to current Viking price list schedule.
2. Metric K-factor measurement shown is when pressure is measured in Bar. When pressure is measured in kPa, divide the metric K-factor shown by 10.0.
3. This chart shows the listings and approvals available at the time of printing. Other approvals may be in process. Check with the manufacturer for any additional approvals.
4. Listed by Underwriter’s Laboratories for use in the U.S. and Canada.
5. The 135 °F (57 °C) [139 °F (59 °C)] covers have an orange label. The 165 °F (74 °C) covers have a white label.
6. Other paint colors are available on request with the same listings as the standard paint colors. Listings and approvals apply for any paint manufacturer. Contact Viking
for additional information.
7. cULus Listed as corrosion resistant.
8. FM Approved as a decorative finish.
NOTE:Custom colors are indicated on a label inside the cover assembly. Refer to Figure 2.

STANDARD AND
QUICK RESPONSE
CONCEALED PENDENT
SPRINKLER VK4621 (K5.6)
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: [phone] Technical Services: 877-384-5464 Fax: [phone] Email: [email protected]
Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com
Page 5 of 8
Form No. F_092121 Rev 01 April 2023
DESIGN CRITERIA - FM
(Also refer to Approval Chart)
FM Approval Requirements:
Viking Concealed Pendent Sprinkler VK4621 is FM Approved as a standard response Non-Storage concealed pendent sprinkler as indicated in the FM
Approval Guide. For specific application and installation requirements, reference the latest applicable FM Loss Prevention Data Sheets (including Data
Sheet 2-0). FM Global Loss Prevention Data Sheets contain guidelines relating to, but not limited to: minimum water supply requirements, hydraulic
design, ceiling slope and obstructions, minimum and maximum allowable spacing, and deflector distance below the ceiling.
NOTE: The FM installation guidelines may differ from cULus and/or NFPA criteria.
IMPORTANT: Always refer to Bulletin Form No. F_091699 - Care and Handling of Sprinklers. Also refer to Form No. F_080614 for general care,
installation, and maintenance information. Viking sprinklers are to be installed in accordance with the latest edition of Viking technical data,
the appropriate standards of NFPA, LPCB, APSAD, VdS or other similar organizations, and also with the provisions of governmental codes,
ordinances, and standards, whenever applicable.
DESIGN CRITERIA - UL
(Also refer to Approval Chart)
cULus Listing Requirements:
Concealed Pendent Sprinkler VK4621 is cULus Listed as quick response for installation in accordance with the latest edition of NFPA 13 for standard
coverage pendent spray sprinklers as indicated below.
• For hazard occupancies up to and including Ordinary Hazard, Group II.
• Protection areas and maximum spacing shall be in accordance with the tables provided in NFPA 13. Maximum spacing allowed is 15 ft. (4.6 m).
• Minimum spacing allowed is 6 ft. (1.8 m) unless baffles are installed in accordance with NFPA 13.
• Minimum distance from walls is 4 in. (102 mm).
• Maximum distance from walls shall be no more than one-half of the allowable distance between sprinklers. The distance shall be measured
perpendicular to the wall.
• The sprinkler obstruction rules contained in NFPA 13 for standard coverage pendent spray sprinklers must be followed.
NOTE: Concealed sprinklers must be installed in neutral or negative pressure plenums only.
IMPORTANT: Always refer to Bulletin Form No. F_091699 - Care and Handling of Sprinklers. Also refer to Form No. F_080614 for general care,
installation, and maintenance information. Viking sprinklers are to be installed in accordance with the latest edition of Viking technical data,
the appropriate standards of NFPA, LPCB, APSAD, VdS or other similar organizations, and also with the provisions of governmental codes,
ordinances, and standards, whenever applicable.

STANDARD AND
QUICK RESPONSE
CONCEALED PENDENT
SPRINKLER VK4621 (K5.6)
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: [phone] Technical Services: 877-384-5464 Fax: [phone] Email: [email protected]
Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com
Page 6 of 8
Form No. F_092121 Rev 01 April 2023
Figure 2: Identification of Custom Paint Figure 3: Square Cover Assembly
All custom color painted cover plates will have an
identifying label affixed to the inside of the cover that
indicates the custom color and will have a representative
sample (a paint dot) of the paint on the label.
F
A
C
T
O
R
Y
A
P
P
L
I
E
D
C
U
S
T
O
M
P
A
I
N
T
C
O
L
O
R
3-5/16” (84 mm)
Figure 1: Installation Wrench

STANDARD AND
QUICK RESPONSE
CONCEALED PENDENT
SPRINKLER VK4621 (K5.6)
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: [phone] Technical Services: 877-384-5464 Fax: [phone] Email: [email protected]
Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com
Page 7 of 8
Form No. F_092121 Rev 01 April 2023
Figure 4: Sprinkler Dimensions
3”
(76 mm)

(57 mm)

or BSPT
Figure 5: Sprinkler Installation Dimensions
NOTE: Image is representative only. Actual product may vary.
NOTE: Image is representative only. Actual product may vary.
Nominal pipe engagement

2”
(50 mm)

(64 mm)
Nominal pipe

(11 mm)
Minimum
Maximum
21/4” (57 mm)
Minimum required
opening in the ceiling

STANDARD AND
QUICK RESPONSE
CONCEALED PENDENT
SPRINKLER VK4621 (K5.6)
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: [phone] Technical Services: 877-384-5464 Fax: [phone] Email: [email protected]
Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com
Page 8 of 8
Form No. F_092121 Rev 01 April 2023
Figure 6: Using the Sprinkler Wrench
Step 2:
Insert the wrench into
the sprinkler adapter.
Step 1:
Remove the protective cap.
NOTICE: USE ONLY the designated sprinkler wrenches shown in this document. Permanent damage to
the sprinkler assembly can occur if the proper wrench is not used. Other sprinkler wrenches available
from Viking may fit into the sprinkler adapter cup; however, only the wrenches shown here are designed
to properly install this sprinkler.
Step 3:
Rotate the wrench slightly in either direction
until the tines on the wrench (A) line up with
the vent openings (B) on the adapter cup and
lock into place. NOTE: A leak tight seal must
be achieved. Turn the sprinkler clockwise

B
AA
C
Install the cover plate by inserting
the adpater (D) into the adapter
cup (C) and pushing or threading
into place (depending on style).
Snug the cover plate in place
by rotating clockwise. Ensure
the cover plate is flush with the
ceiling as shown to allow airflow
through the sprinkler assembly.
Minimum Maximum
Figure 7: Installing the Cover Plate
D
NOTE: Image is representative only. Actual product may vary.
NOTE: Image is representative only. Actual product may vary.
Replaces Form No. F_092121 Rev 22.1
(Replaced wrench 24339 with 23143; replaced protective cap.)

BULLETIN
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: [phone] Technical Services: 877-384-5464 Fax: [phone] Email: [email protected]
CARE AND HANDLING
OF SPRINKLERS
Page 1 of 4
Form No. F_091699 18.10.11 Rev 16.1.P65
SPRINKLERS ARE FRAGILE - HANDLE WITH CARE!
General Handling and Storage:
• Store sprinklers in a cool, dry place.
• Protect sprinklers during storage, transport, handling, and after installation.
• Use the original shipping containers. DO NOT place sprinklers loose in boxes, bins,
or buckets.
• Keep sprinklers separated at all times. DO NOT allow metal parts to contact sprinkler
operating elements.
For Pre-Assembled Drops:
• Protect sprinklers during handling and after installation.
• For recessed assemblies, use the protective sprinkler cap (Viking Part Number 10364).
Sprinklers with Protective Shields or Caps:
• DO NOT remove shields or caps until after sprinkler installation and there no longer is
potential for mechanical damage to the sprinkler operating elements.
• Sprinkler shields or caps MUST be removed BEFORE placing the system in
service!
• Remove the sprinkler shield by carefully pulling it apart where it is snapped together.
• Remove the cap by turning it slightly and pulling it off the sprinkler.
Sprinkler Installation:
• DO NOT use the sprinkler deflector or operating element to start or thread the sprinkler
into a fitting.
• Use only the designated sprinkler head wrench! Refer to the current sprinkler tech-
nical data page to determine the correct wrench for the model of sprinkler used.
• DO NOT install sprinklers onto piping at the floor level.
• Install sprinklers after the piping is in place to prevent mechanical damage.
• DO NOT allow impacts such as hammer blows directly to sprinklers or to fittings, pipe,
or couplings in close proximity to sprinklers. Sprinklers can be damaged from direct or
indirect impacts.
• DO NOT attempt to remove drywall, paint, etc., from sprinklers.
• Take care not to over-tighten the sprinkler and/or damage its operating parts!
Maximum Torque:
1/2” NPT: 14 ft-lbs. (19.0 N-m)
3/4” NPT: 20 ft-lbs. (27.1 N-m)
1” NPT: 30 ft-lbs. (40.7 N-m)
WARNING
Any sprinkler with a loss of liquid from the glass bulb or damage to the fusible element should be destroyed. Never install sprinklers
that have been dropped, damaged, or exposed to temperatures exceeding the maximum ambient temperature allowed. Sprinklers that
have been painted in the field must be replaced per NFPA 13. Protect sprinklers from paint and paint overspray in accordance with
the installation standards. Do not clean sprinklers with soap and water, ammonia, or any other cleaning fluid. Do not use adhesives
or solvents on sprinklers or their operating elements.
Refer to the appropriate technical data page and NFPA standards for complete care, handling, installation, and maintenance
instructions. For additional product and system information Viking data pages and installation instructions are available on
the Viking Web site at www.vikinggroupinc.com.
CORRECT
(Original container used)
INCORRECT
(Placed loose in box)
CORRECT
(Protected with caps)
INCORRECT
(Protective caps not used)
CORRECT
(Piping is in place at the
ceiling)
INCORRECT
(Sprinkler at floor level)
CORRECT
(Special installation
wrenches)
INCORRECT
(Designated wrench not
used)

Replaces Form No. F_091699 Rev 16.1
(Added P65 Warning)

BULLETIN
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: [phone] Technical Services: 877-384-5464 Fax: [phone] Email: [email protected]
CARE AND HANDLING
OF SPRINKLERS
Page 2 of 4
Form No. F_091699 18.10.11 Rev 16.1.P65
PROTECTIVE SPRINKLER SHIELDS AND CAPS
General Handling and Storage:
Many Viking sprinklers are available with a plastic protective cap or shield temporarily covering the operating elements. The snap-
on shields and caps are factory installed and are intended to help protect the operating elements from mechanical damage during
shipping, storage, and installation. NOTE: It is still necessary to follow the care and handling instructions on the appropriate sprin-
kler technical data sheets* when installing sprinklers with bulb shields or caps.
WHEN TO REMOVE THE SHIELDS AND CAPS:
NOTE: SHIELDS AND CAPS MUST BE REMOVED FROM SPRINKLERS BEFORE PLACING THE SYSTEM IN SERVICE!
Remove the shield or cap from the sprinkler only after checking all of the following:
• The sprinkler has been installed*.
• The wall or ceiling finish work is completed where the sprinkler is installed and there no longer is a potential for mechanical damage
to the sprinkler operating elements.
SHIELDS AND CAPS MUST BE REMOVED FROM SPRINKLERS BEFORE PLACING THE SYSTEM IN SERVICE!
Figure 1: Sprinkler shield being
removed from a pendent sprinkler.
Figure 2: Sprinkler cap being
removed from a pendent sprinkler.
Figure 3: Sprinkler cap being re-
moved from and upright sprinkler.
HOW TO REMOVE SHIELDS AND CAPS:
No tools are necessary to remove the shields or caps from sprinklers. DO NOT use any sharp objects to remove them! Take care
not to cause mechanical damage to sprinklers when removing the shields or caps. When removing caps from fusible ele-
ment sprinklers, use care to prevent dislodging ejector springs or damaging fusible elements. NOTE: Squeezing the sprinkler cap
excessively could damage sprinkler fusible elements.
• To remove the shield, simply pull the ends of the shield apart where it is snapped together. Refer to Figure 1.
• To remove the cap, turn it slightly and pull it off the sprinkler. Refer to Figures 2 and 3.
Refer to the current sprinkler technical data page to determine the correct sprinkler wrench for the model of sprinkler used.
Never install sprinklers that have been dropped, damaged, or exposed to temperatures in excess of the maximum ambient
temperature allowed.
* Refer to the appropriate current technical data pages for complete care, handling, and installation instructions. Data
pages are included with each shipment from Viking or Viking distributors. They can also be found on the Web site at www.
vikinggroupinc.com.