HomeMy WebLinkAbout2675 GATEWAY RD; ; FS110020; Permit8/15/25, 8:40 AM FS110020 Permit Data
City of Carlsbad
Fixed Systems Permit
Permit No: FS110020
Job Address: 2675 GATEWAY RD Status: ISSUED
Permit Type: FIXSYS Applied 6/23/2011
Parcel No: 2131911400 Approved: 6/23/2011
Lot#: 0
Reference No.: Issued: 6/23/2011
PC#: Inspector:
Project Title: HENDO'S LOCAL HOOD & DUCT
Applicant:
FIRE SERVICE CORP.
P.O. BOX 95671
ANAHEIM, CA
562-500-3847
about blank
Fees($)
130
Add'I Fees ($)
0
Owner:
LNR CPI BRESSI RETAIL LL C
C/O LNR PROPERTY CORP
4350 VON KARMAN AVE #200
NEWPORT BEACH CA
Total($)
130
Balance($)
0
1/1
Chapter 3 -System Design
Page 3-1
REV. 5
CHAPTER Ill
SYSTEM DESIGN
•GENERAL
►
The KITCHEN KNIGHT II Restaurant Fire Suppression System
may be used on a number of different types of restaurant
cooking appliances and hood and duct configurations. The
design information listed in this section deals with the limita-
tions and parameters of this pre-engineered system. Those
individuals responsible for the design of the KITCHEN KNIGHT
II system must be trained and hold a current PYRO-CHEM
certificate in a KITCHEN KNIGHT II training program.
NOZZLE COVERAGE AND
PLACEMENT
This section will provide guidelines for determining nozzle type,
positioning, and quantity for duct, plenum, and appliance
protection.
Duct Protection
It is not required that the fan be shut down or the exhaust duct
be dampered for the system to operate properly.
All duct protection is UL listed without limitation of maximum
duct length (unlimited length). This includes all varieties of
ductworks both horizontal and vertical including ducts that run
at angles to the horizontal and ducts with directional bends.
Duct protection requires that a nozzle be positioned to
discharge into the duct. Two nozzles are available for duct
protection.
The Model IL Nozzle, Part No. 551026, is a one (1) flow
nozzle. A single IL nozzle is capable of protecting square or
rectangular ducts with a maximum perimeter of 50 in. (127 cm)
► (maximum side of 16 3/4 in. (42.6 cm)), with the diagonal
being a maximum of 18 3/4 in. (47.6 cm). It can also protect a
round duct with a maximum diameter of 16 in. (40.6 cm).
The Model 2D duct nozzle, Part No. 551038, is a two (2) flow
nozzle. A single 20 nozzle is capable of protecting square or
rectangular ducts with a maximum perimeter of 100 in.
(254 cm), with the diagonal being a maximum of 37 3/8 in.
(94.9 cm). It can also protect a round duct with a maximum
diameter of 31 7/8 in. (81 cm).
When two (2) 2D duct nozzles are used to protect a single
duct, the cross sectional area of the duct must be divided into
two equal symmetrical areas. The nozzle must then be
installed on the centerline of the area it protects and aimed
directly into the duct opening.
►
The nozzle(s) must be installed on the centerline of the duct,
with the tip located Oto 6 in. (15.2 cm) into the opening, and
aimed directly into the duct opening. See Figure 3-1.
In installations where a UL listed damper assembly is
employed, the duct nozzle can be installed beyond the 6 in.
(15.2 cm) maximum, to a point just beyond the damper assem-
bly that will not interfere with the damper. Exceeding the maxi-
mum of 6 in. (15.2 cm) in this way will not void the UL listing of
the system.
ILOR 2D
NOZZLE
0-6 IN.
!NTO DUCT
Figure 3-1.
ULEX 3830
December 1 , 2009
General Piping Requirements
1. Split piping and straight piping are both allowed on
• a PCL-160, PCL-300 and PCL-460 system.
•
I •
•
2. PCL-600 systems must use split piping only, with no
nozzle located before the split, and with a maximum
of 14 flow points per side. 1/2 in. minimum piping
must be used up to the first split.
3. Maximum volume tor 1/4 in. pipe between a nozzle
and the preceding tee is 41 O mis.
4. Maximum flow numbers for 1/4 in. pipe is 6.
5. Maximum number of elbows between a nozzle and
the preceding tee is 5.
6. Maximum of 25 elbows are allowed in the total
piping system.
7. Maximum difference in elevation between the tank
outlet and any nozzle, or the tank outlet and the
highest or lowest horizontal pipe run, is 10 ft
(3.1 m).
8. No traps are allowed in the piping network.
9. Pipe lengths are measured from center to center of
fittings.
10. The internal equivalent length volume of fittings
does not have to be considered as part of the total
pipe volume.
11. When utilizing different size pipe in the system, the
largest size must start first and the additional pipe
must decrease as it approaches the nozzle.
12. Elbow(s) or swivel adaptors located at the nozzles
do not have to be counted in the 25 elbow maxi-
mum requirement.
13.
14.
Reducing bushings are allowed when reducing to a
smaller pipe size.
Additional piping requirements when protecting a
range, wok, or a fryer:
PCL-160 -Minimum of 239 ml and one (1) flow
number required in total system. Of that minimum,
180 ml must be utilized at or before the range,
wok, or fryer.
• PCL-300 -Minimum of 300 ml and four (4) flow
numbers required in total system. Of that mini-
mum, 239 ml and two (2) flow numbers must be
utilized at or before the range, wok, or fryer.
• PCL-460-Minimum of 660 ml and ten (10) flow
numbers required in total system. Of that mini-
mum, 180 ml and two (2) flow numbers must be
utilized at or before the range, wok, or fryer.
PCL-600 -Minimum of 960 ml and fourteen (14)
flow numbers required in total system. Of that
minimum, 120 ml and 2 flow numbers must be
utilized at or before the range, wok, or fryer.
0061S1PC
Figure 3-18.
Design Steps
Chapter 3 -System Design
Page 3-15
REV. 3
SPLIT PIPING (REQUIRED
ON PCL600 SYSTEMS)
Step No. 1 Determine number of flow points required based
on duct size, plenum size and type, and size of all
appliances.
Step No. 2 Determine size and quantity of tanks required.
Refer to the chart in HGeneral Piping
Requirements" to determine the maximum amount
of flow numbers allowed per each tank size.
Step No. 3 Layout nozzles, piping diagram, and tank location.
Determine pipe lengths as accurate as possible.
Make certain maximum number of elbows is not
exceeded. Note: Tanks cannot be manifolded
together. Each tank must have a separate
piping network.
Step No. 4 Add all the lengths of each pipe run and multiply
by the mls./ft. listed in the Volume Chart. If the
sum falls within the acceptable range noted in
general Piping Requirements, that pipe size is
acceptable. If the calculated volume is too large,
recalculate the volume using the ml per foot of a
smaller pipe size. Pipe sizes can be mixed but
Rule No. 11 of the General Piping Requirements
must be followed.
Step No. 5 Check to make certain minimum volumes, maxi-
mum volumes and maximum volume allowed
between first nozzle and last nozzle is not
exceeded (Tank Chart). Check each rule in
MGeneral Piping Requirement" to make certain
none have been exceeded. If any requirement is
exceeded, change to a different pipe size and
recalculate.
ULEX 3830
March 1, 2006
Chapter 3 -System Design
Page 3-14
REV. 5
Fryer -Multiple Nozzle Protection
Fryers exceeding the coverage of a single nozzle can be
divided into modules. Each module must not exceed the maxi~
mum area allowed for a single nozzle. However, when utilizing
multiple nozzle protection, the longest side allowed for a fryer
with drip board can be used, regardless of whether the fryer
has a drip board or not.
The maximum size fryer that can be modularized is 864 sq in.
(5574 sq cm).
Design requirements for multiple nozzle fryers are broken
down as follows:
1. If the fryer includes any dripboard areas, measure both the
internal length (front to back) and width of the frypot
portion. Then measure the internal length and width of the
overall hazard area including any dripboard areas.
Determine the area of both the frypot and the area of the
overall vat by multiplying corresponding length and width
dimensions.
2. Divide the frypot or overall vat into modules, each of which
can be protected by a single nozzle, based on the maxi-
mum dimension and area coverage of the nozzle as speci-
fied in "Design Chart. u
PIPING LIMITATIONS
Once the nozzle placement and quantity of tanks has been
determined, it is necessary to determine the piping configura-
tions between the tank and the nozzles. This section contains
the guidelines and limitations for designing the distribution
piping so that the wet chemical agent will discharge from the
nozzles at a proper flow rate. These limitations must also be
referred to when selecting the mounting location for the tanks.
The maximum pipe lengths are based on internal pipe volume.
Each size tank is allowed a minimum and maximum total
volume of piping, calculated in milliliters.
There is no need to distinguish between what portion of the
piping is supply line and what portion is branch line. Only the
total volume of the complete piping network has to be consid-
ered.
Volume Chart
1/4 in. pipe= 20.5 mis/ft
318 in. pipe= 37.5 mis/ft
1/2 in. pipe = 59.8 mis/ft
3/4 in. pipe = 105.0 mis/ft
If the module considered does not include any portion of Tank Chart
the dripboard, use only the maximum frypot area and
maximum dimension listed in the "Design Chart." ► "'Maximum
Volume Allowed
• If the module considered includes any dripboard areas,
use both the maximum frypot area and dimension listed
in the "Design Chartw, and the maximum overall area
and dimension listed in the "Design Chart."
3. None of the maximum dimensions may be exceeded. If
either the maximum frypot or the overall sizes are
exceeded, the area divided into modules will need to be
redefined with the possibility of an additional nozzle.
• Design Chart
Option 1
Option 2
•
ULEX 3830
December 1, 2009
Longest
Side
27 314 in.
(70.5 cm)
25 318 in.
(64.5 cm)
Vat Coverage
Coverage with Drip
324 in2 500in2
(2090 cm2) (3226 cm2)
371 in2 495in2
(2394 cm2) (3194 cm2)
Maximum Between First
Maximum Pipe Nozzle and
Tank Flow Volume Last Nozzle
Size Numbers (mllllllters) (mllllllters)
1.6 Gallon 5 1500 600
PCL-160
3.0 Gallon 10 1910 1125
PCL-300
4.6 Gallon 14 3400 3000
PCL-460
4.6 Gallon 15 2600 2000
PCL-460
6.0 Gallon 19 4215 1688
PCL-600 per side
6.0 Gallon 20 3465 1313
PCL-600 per side
► • All piping, including nozzle drops, must be included in the
► piping calculations .
Minimum Pipe Volumes for a Fryer, Range, and Wok
Cylinder Size Entire System At or before appliance
PCL160 239 ml -1 Flow Pl 180 ml -1 Flow Pl
PCL 300 300 ml -4 Flow Pts 239 ml -2 Flow Pts
PCL460 660 ml -10 Flow Pls 180 ml· 2 Flow Pls
PCL 600 960 ml -14 Flow P1s 120 ml -2 Flow Pls
J
. ~· ~-·--,-·· .
PIPE VOLUMES QTY.
SUPPLY PIPE (FT) UNIT COST EXTENT
FROM TANK 6 37.50 225.00
TO PLENUM BRANCI 2.5 37.50 93.75
TO RANGE BRANCH 37.50 37.50
TO FRYER BRANCH 3.1 37.50 116.25
TO PLENUM BRANCI 1.75 37.50 65.63
TO DUCT BRANCH 1 37.50 37.50
TO PIZZA OVEN BRA 2 37.50 75.00
650.63
RANGE BRANCH
TO TEE 3 37.50 112.50
TO ELBOW (BOTH) 1 37.50 37.50
37.50 0.00
FRYER BRANCH
TO TEE 1.5 37.50 56.25
TO ELBOW (BOTH) 1.5 37.50 56.25
37.50 0.00
PIZZA BRANCH
TO 1STTEE 3.25 37.50 121.88
TO2ND TEE 1.2 37.50 45.00
TO ELBOW 1.2 37.50 45.00
TOTAL SUPPLY VOLUME 650.63
VOLUME TO 1ST RANGE NOZZLE 468.75
TOTAL RANGE BRANCH 150.00
TOTAL FRYER BRANCH 112.50
TOTAL PIZZA BRANCH 211.88
TOTAL PIPE VOLUME 1125.00
MIN. ALLOWED 660.00
MAX. ALLOWED 2600.00
MIN. BEFORE RANGE OR FRYER 180.00
ACTUAL VOLUME BEFORE RANGE 506.25
•
14. Chain Broiler (internal chamber 1026 sq in. (6619 sq cm)
x 38 in. (97 cm) longest side maximum)
One nozzle is available for chain broiler protection.
The 1L nozzle, Part No. 551026, is used tor broiler protec-
tion. This nozzle is a one (1) flow nozzle. The nozzle must
be located 1 to 3 in. (3 to 8 cm) above the surface of the
chain, at the front edge of the appliance, and pointed at
the opposite diagonal corner. The nozzle must be aimed
parallel to the chain surface. See Figure 3-16.
'
-~ 000190PC ~
Figure 3·16.
1L NOZZLE AIMED
AT OPPOSITE
DIAGONAL CORNEA
_J_
i
1-3!N.
(3-8 cm)
15_ Tilt Skillet/Braising Pan
Chapter 3 -System Design
Page 3-13
REV.3
Protection for tilt skillet or braising pans is to be based
upon the coverage limitations provided for deep fat fryer
protection. Coverage limitations are based on fryer sizes
including drip boards. Exception: Tilt skillets and braising
pans may exceed the maximum of 6 sq ft (0.6 sq m)
total when modularizing. Tilt skillets and braising pans
generally utilize a hinged cover. Fryer protection nozzles
are to be placed toward the front of the appliance to
minimize the potential for the tilt skillet or braising pan
cover to interfere with the nozzle discharge. See Figure
3·17.
COVER MUST
NOT INTERFERE
WITH NOZZLE
DISCHARGE
4FT
(12m)
THE NOZZLE JS TO BE PLACED TOWARD THE FRONT OF THE APPLIANCE
TO MINIMIZE THE POTENTIAL FOR THE SKILLET OR BRAISING PAN COVER
TO INTERFERE WITH THE NOZZLE DISCHARGE
COVER MUST
NOT INTERFERE
WITH EDGE OF
DISCHARGE
PATTERN
-1
FOR MINIMUM
AND MAXIMUM
NOZZLE
HEIGHTS, REFER
TO FRYER
NOZZLE
!:ITERS
FRYER NOZZLE USED FOR TILT SKILLET OR BRAISING PAN PROTECTION
MUST BE POSITIONED NEAR THE FRONT EDGE OF THE PAN ANO AIMED AT
THE FRONT TO BACK CENTERLINE OF THE PAN. THE DISCHARGE FROM
THE NOZZLE(S) MUST COMPLETELY CLEAR THE PAN COVER WITH AN
UNOBSTRUCTED VIEW TO THE BACK OF THE PAN
Figure 3•17.
ULEX 3830
March 1, 2006
► 1. Fryers without Drip Board (19 in. x 19 1/2 in. maximum)
(48 x 49.5 cm)
Two nozzles are available for fryer protection: High proxim-
ity and low proximity.
The Model 2H nozzle, Part No. 551028, is used for high
proximity fryer protection. This nozzle is a two (2) flow
nozzle. The nozzle must be located anywhere within the
perimeter of the hazard area, 24 in. to 48 in. (61 to 122
cm) above the cooking surface of the appliance and aimed
► at the center of the cooking area. See Figure 3~3.
The Model 2L nozzle is used for low proximity fryer protec-
tion. This nozzle is a two (2) flow nozzle. The nozzle must be
located anywhere on the perimeter of the hazard area, 13
in. to 24 in. (33 to 61 cm) above the cooking surface of the
appliance and aimed at the center of the cooking area. See
► Figure 3-3.
•
I
I
2H
I HIGH
PROXIMITY
NOZZLE
LOCATED
1 ANYWHERE
) 1 WITHIN THE
I 2H, 2L l ~ I PERIMETER
II f_ -1 ~-t-.,:_ LOW
/ I 48"(122cm) : ... _r.-: PROXIMITY 1 1 I, 1ilt NOZZLE
I /.. ' ONTHE
I / I 24" PERIMETER 11 / / 13" (61 cm)
//
1
2LI '1' ~l j I ;~:~~RE
/// (33cmJ LJ ~ .J
~---4'----rl '
' : ____ 't_ OF __ l
HAZARD
AREA
EDGE OF
HAZARD
AREA
0061761'C
FRYERS WITHOUT
DRIP BOARDS
Figure 3-3 .
► 1a. Fryers with Drip Board
The maximum single nozzle protection dimensions depend
on the dimensions of the fry pot only.
For fry pots with maximum dimensions of 18 in. (45.7 cm)
on the longest side and 324 sq in. (2090 sq cm) max. area,
use overall dimensions of 27 3/4 in. (70.5 cm) on the
longest side and 500 sq in. (3226 sq. cm) max. area.
For fry pots with maximum dimensions exceeding 18 in. x
324 sq in. (2090 sq cm), but no greater than 19 1/2 in.
(49.5 cm) on the longest side and 371 sq in. (2394 sq cm)
max area, use overall dimensions of 25 3/8 in. (64.5 cm)
on the longest side and 495 sq in. (3194 sq cm) area.
Two nozzles are available for fryer protection: High proxim-
ity and low proximity.
The Model 2H nozzle, Part No. 551028, is used for high
proximity fryer protection. This nozzle is a two (2) flow
nozzle. The nozzle must be located anywhere within the
perimeter of the hazard area, 24 in. to 48 in. (61 to
122 cm) above the cooking surface of the appliance and
aimed at the center of the cooking area. See Figure 3-3b.
The Model 2L nozzle is used for low proximity fryer protec-
tion. This nozzle is a two (2) flow nozzle. The nozzle must
be located anywhere on the perimeter of the hazard
•
•
•
Chapter 3 -System Design
Page 3-5
REV.5
area, 13 in. to 24 in. (33 to 61 cm) above the cooking
surface of the appliance and aimed at the center of the
cooking area. See Figure 3a3a .
2H
/·-----r
I 2H, 2l I
1 /-481N.
1 I T
1
(122 cm)
I I I I I 2L 24 IN. I L.,_ (61 cm)
I I ' I • 1 I I / • I
// / 131N,nll / {33cm~
' ' I 1 't_ OF : 1------~--
EDGE OF
HAZARD
AREA HAZARD
AREA 006178PC
HIGH
PROXIMITY
~----~~~~io ~ : ANYWHERE I l I l WITHIN THE
1 I : j PERIMETER I J...,.._.._ I k .... I l ">------LOW
1 -~.j--,.. : PROXIMITY
I ] : : NOZZLE : ' ' : ~;:c~~fe,
ON THE
PERIMETER ,
~,
FRYERS WITH
DRIPBOARDS
Figure 3-3a .
2. Small Range (336 sq in. (2168 sq cm) maximum, 28 in.
(71 cm) longest side maximum). Use this when nozzle is
center located.
Two nozzles are available for small range protection: High
proximity and low proximity.
The Model 1 H nozzle, Part No. 551029, is used for high
proximity small range protection. This nozzle is a one (1)
flow nozzle. When using high proximity protection, the
range cannot be under a backshelf. This nozzle must be
located on the fronVback centerline of the appliance, 40 in.
to 50 in. (102 to 127 cm) above the cooking surface, and
aimed directly down within the "Nozzle Location Area"
depending on the size of the hazard area. See "Nozzle
Placement'' chart below. See Figure 3-4 .
NOZZLE FLEXIBILITY PLACEMENT CHART (When
using nozzle flexibility, the maximum width that can be
protected is 12 in. (31 cm))
Length -L Width -W
in. (cm) in. (cm)
12 (31) 12 (31)
13 (33) 12 (31)
14 (36) 12 (31)
15 (38) 12 (31)
16 (41) 12 (31)
17 (43) 12 (31)
18 (45) 12 (31)
19 (48) 12 (31)
20 (51) 12 (31)
21 (53) 12 (31)
22 (56) 12 (31)
23 (58) 12 (31)
24 (61) 12 (31)
25 (64) 12 (31)
26 (66) 12 (31)
27 (69) 12 (31)
28 (71) 12 (31)
Front/Rear
in.• (cm)'
8 (20)
71/2 (19)
7 (18)
6 1/2 (17)
6 (15)
5 1/2 (14)
5 (13)
4 1/2 (11)
4 (10)
3 1/2 (9)
3 (8)
2 1/2 (6)
2 (5)
1 1/2 (4)
1 (3)
1/2 (1)
0 (0)
*Distance from centerline, either toward front or toward back, of hazard
area, starting from the reference point.
ULEX 3830
December 1, 2009
Chapter 3 -System Design
Page 3-6
REV. 5
► Figure 3-4.
► The Model 1 L nozzle, Part No. 551026, is used for low proxim-
ity small range protection. This nozzle is a one (1) flow nozzle.
The range can be equipped either with or without a back-
shelf. Either type requires the same nozzle requirements. The
nozzle must be located 22 in. (56 cm) from either end of the
hazard area centered from left to right. It must be 13 in. to 24
in. (33 to 61 cm) above cooking surface, and aimed at a point
one half the distance of whatever the height dimension of the
nozzle is. When determining nozzle and aim point locations,
both measurements are to be taken from the same end of the
hazard area. Example: The nozzle is mounted 20 in. (51 cm)
above the cooking surface. The aim point from the edge of the
hazard would then be 10 in. (25 cm) which is one half the
► nozzle mounting height dimension. See Figure 3-4a. Note:
Nozzles must be placed at or below the shelf, within the nozzle
height limitations.
►
EDGE OF
HAZARD AREA
{FRONT OR BACK)
I
"I/
-X -
/I" -···-·~-
"I/ -x-
7i"'
c;:
ULEX 3830
December 1 , 2009
22 !N. -----I
---(56 cm) j_,{ 1 L
,/~
/ ~ 24 lN. (H) ,',, r {61 cm)
.,;,,' 131~-(H)
,,"/ (33cm) ;
;
Figure 3-4a.
2a. High-Proximity Backshelf Protection -When using the
2L nozzle for range protection with high-proximity backshelf,
the maximum length of burners being protected must not
exceed 28 in. (71 cm) and the maximum area of the burners
must not exceed 336 sq in. (2167 sq cm). The backshelf must
be a minimum of 18 in. (45.7 cm) above the top of the range
and may overhang the burner by a maximum of 11 in. (28 cm).
Note: Although most shelves exceed 11 in. (28 cm) in overall
depth, make sure the shelf does not exceed 11 in. (28 cm)
overhang of the burner.
Nozzle must be located on the front edge of the front burner
and aimed at a point 10 in. (25 cm) foiward from the back
edge of the back burner on the front-to-rear centerline. Nozzle
must be mounted 24 to 35 in. (61 -89 cm) above the hazard
► surface. See Figure 3-4b.
►
\ I\ SHELF CAN OVERHANG BUANER(S)
I \ A MAXIMUM OF 11 IN. (28 cm)
1\
I '
I ' I ' I '
I ' I ' I ' I ' I I
MAX. 28 IN. I
24-35 IN (71 cm) 1
(61-89 cm)
__,,,,.-
_..!..---""'-FRONT TO REAR
CENTERLINE
HIGH PROXIMITY BACK SHELF PROTECTION WITH THE 2L NOZZLE.
AREA OF PROTECTION PEA NOZZLE· MAX. LENGTH OF BURNER
GRATES 28 IN. (71 cm) AND MAX. AREA OF BURNER GRATES NOT
TO EXCEED 336 SQ IN. (2168 sq cm)
Figure 3-4b.
►
►
►
►
►
►
Transition Ducts -The protection of non-standard ducts
should be reviewed by the authority having jurisdiction. PYRO-
CHEM KITCHEN KNIGHT II recommends that transition ducts
be protected as follows:
a. Transition ducts -larger to smaller
In cases where the duct/plenum interface opening is
larger than the final exhaust duct, measure the perime-
ter/diameter of the duct halfway between the largest and
smallest section (or the average perimeter/diameter). The
nozzle is to be located within 0-6 in. (15.2 cm) of the
duct/plenum interface (not at the point where the
measurement was taken), centered under the final
c. Multiple risers
Chapter 3 -System Design
Page 3-3
REV.4
In cases of multiple rises, each riser is protected as an
► individual duct. See Figure 3-1 d.
DUCT
DD
exhaust duct opening. See Figure 3-1b. ► Figure 3-1d.
Note; Nozzles to protect ducts with a transition that is
more than 4 ft (1.2 m) in height, will be required to be
positioned in the opening of the transition from the hood
2 to 8 in. (5.1 to 20.3 cm) into the opening using standard
duct nozzle design parameters.
PERIMETER -----',-----~
MEASUREMENT
Figure 3-1b.
b. Transition ducts -smaller to larger
1/2WAY INTO
TRANSITION
006173PC
In cases where the duct/plenum interface opening is
smaller than the final exhaust duct, measure the perime-
ter/diameter of the final exhaust duct. The nozzle(s) is to
be located within 0-6 in. (15.2 cm) of the duct/plenum
interface, centered in the opening. See Figure 3-1c.
PERIMETER --
MEASUREMENT
Figure 3-1c.
006114PC
Electrostatic Preclpltator -Ducts utilizing electrostatic
precipitators must be protected above and below the unit.
Standard duct nozzles are used in this application. See Figure
► 3-1e.
►
2D NOZZLE
~-PRECIPITATOR
PLENUM
20 NOZZLE
000176PC
Figure 3-1e.
Plenum Protection
The Model 1H nozzle, Part No. 551029, is a one (1) flow
nozzle used for plenum protection. A single 1 H nozzle can
protect a plenum (with single or V-bank tilters) 10 ft (3.1 m)
long by 4 ft (1.2 m) wide. Dividing the length into sections
equal to or less than 10 ft (3.1 m) in length and positioning a
nozzle at the start of each section can be done to protect
longer plenums.
ULEX 3830
December 1, 2009
Chapter 3 -System Design
■ Page 3-20
REV.2
Cooking Appliance(s).
Each cooking appliance with a continuous cooking surface not
exceeding 48 in. x 48 in. (122 x 122 cm) shall be protected by
one (1) detector. Cooking appliances with a continuous cook-
ing surface exceeding 48 in. x 48 in. (122 x 122 cm) shall be
protected by one (1) detector per 48 in. x 48 in. (122 x 122 cm)
cooking area. Detectors used for cooking appliances must be
located above the protected appliance toward the exhaust duct
side of the appliance. The detector should be located in the air
stream of the appliance to enhance system response time.
► If the cooking appliance is located under an exhaust duct where
a detector has been mounted, it is normally not necessary to
utilize another detector for that cooking appliance, provided the
detector is not more than 12 in. (30 cm) into the duct and the
appliance has no larger cooking surface than 48 in. x 48 in.
(121.9 cm x 129.1 cm). See Figure 3-24.
Note: If two (2) appliances are located under a duct opening
where a detector has been mounted and both appliances
together do not exceed a cooking surface of 48 in. x 48 in.
(121.9 cm x 121.9 cm) and the detector is located above both
the protected appliances, it is not necessary to utilize an addi-
tional detector provided the duct detector is not more than
12 in. (30.5 cm) into the duct opening.
" '" ,,.,
I
i
APPLIANCE APPLIANCE APPLIANCE
REQUIRES COVERED BY REQUIRES
SEPARATE DETECTOR SEPARATE
DETECTOR UNDER DUCT DETECTOR
Figure 3-24. Proper Detector Placement.
000209
Each cooking appliance with a continuous cooking surface not
exceeding 48 in. x 48 in. {122 x 122 cm) can be protected by a
minimum of one detector. Cooking appliances with a continu-
ous cooking surtace exceeding 48 in. x 48 in. must be protected
by at least one detector per 48 In. x 48 In. cooking area.
Detectors used for cooking appliances must be located above
the protected appliance toward the exhaust duct side of the
appliance. The detector should be located in the air stream of
► the appliance to enhance system response time.
ULEX 3830
December 1, 2009