Bryant 246 User manual

The Bryant Model 246 is a low-pressure, cast-iron sec¬
tional boiler designed for use in water or steam
heating systems. The design is certified by the
American Gas Association for use with natural or
propane gas, The type S boiler can be used in steam
systems with a maximum working pressure of 15 psig.
The type W boiler can be used in water systems with a
normal working pressure of 30 psig and is available
for systems with working pressures of 50 psig or 100
psig when appropriate gauge and relief controls are
used.
All installations are subject to codes established by
local utilities or other authorities having jurisdiction.
This jurisdiction normally covers electrical wiring, gas
piping, flue specification and insulation of adjacent
combustible material where required clearances can¬
not be maintained. As a practical guide, use the
American National Standard Installation of Gas Ap¬
pliances and Piping Z21.30, and Bryant Form No.
39003D1 “Procedure for Gas Appliances”.
Read these instructions completely before beginning
the installation.
Cancels 39246D1 Rev 1 I 39246D9
H 11/15/71
It is recommended that the following step-by-step in¬
structions be followed for best assembly results.
Inspection
Locating the Boiler
Assembling the, Base
Assembling...the. Boiler Sections
Installing the Draft Hood
Manifold and Pilot Header Assembly
Installing Casing Panels
Boiler Header and Piping Installation
Steam and Water Trim' Controls
Gas Controls and Main Gas Connections
- -• -Eflectr i cal-Wiring— . — -.. .
Flue Connection and Venting
Firing Boiler and Control Adjustment
Servicing
Note: The terms “right-hand” and “left-hand”
whenever used in this installation instruction are
determined by facing the side of the boiler with the
manifold.
INSPECTION
The boiler is shipped knocked down. On the end of the
boiler fitting box there is a master copy of all
packages required to assemble the boiler. Each box
has a package number. Check to be sure all required
packages have been received. Also check the rating
plate for type of gas, input, voltage, etc., to be sure
Figure 1 - Model 246 Boiler
that all equipment furnished meets the requirements
of the installation. Any lubricant or pipe dope used ,
for gas valve or gas pipe connections, shall be
resistant to the action of propane.
LOCATING THE BOILER
The boiler should be centrally located with respect to
the distribution system and as close to the chimney as
possible.
This boiler is not intended for use on combustible
.floors,.When selecting the installation site, r emember .
it must have a firm, non combustible level foundation.
Construct a level concrete pad if necessary. If the
boiler base is not level, the sections will not align
properly and assembly difficulties will be encoun¬
tered.
If the Model 246 is to be used as a steam boiler and is
to be connected to another steam boiler, the factory
design waterlines of the two boilers must be equal
distance above floor level.
Combustion Air
APPLIANCES LOCATED IN
UNCONFINED SPACES
In unconfined spaces in buildings of conventional
frame, brick, or stone construction, infiltration nor-

FAX No. 317 240 5662
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mally is adequate to provide air for combustion, ven¬
tilation, and draft hood dilution* *
If the uneonfined space is within a building of
unusually tight construction, air for combustion, ven¬
tilation, and draft hood dilution shall be obtained
from outdoors or from spaces freely communicating
with the outdoors. Under these conditions a per¬
manent opening or openings having a total free area
of not less than one square inch per 5,000 Btuh of
total input rating of all appliances shall be provided.
Ducts used to convey makeup air from the outdoors
shall be of the same cross-sectional area as the free
area of the openings to which they connect Such ducts
connected to the outside air only may be connected, to
the cold air return of the heating system. The
minimum dimension of rectangular air ducts shall be
not less than 3 inches.
All air from inside building:
The confined space shall be provided with two per¬
manent openings, one near the top of the enclosure
and one near the bottom, Each opening shall have a (
free area of not less than one square inch per 1,000 V,-
Btuh of the total input rating of all appliances in the
enclosure, freely communicating with interior areas
having in turn adequate infiltration from the outside.

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TABLE || - PERFORMANCE DATA
Boiler Size
Ratings—
Natural & Propane Gas (1)
I Net Ratings (2)
Capacity
allons
Gross
HorRopnwnr Input
Btuh
Gross Output
Steam
Sq Feet
Water
Sq Feet
water
G
Btuh
Steam
Sq Feet
Water
Sq Feet
Btuh Entire
Bailer
To Water
Une
Output (3)
4 315,000 252,000 1,050
1,680
189,000 78B
1,260 27.3 18.8
7,52
5 420,000
336,000 1,400 2,240 252,100 1,050
1,680 33.7 23.2 10.03
. 6 525,000 420,000
, 1,750
2,800 315,100 1,313 2,100 40.1 27.6 12,54 >
r. 630,000
504,000
2,100 3,360 378,100
1,575 2,520 46.5 32.0 15.05
8 735,000 588,000 2,450 3,920
441,100 1,838 i
2,940
52.9
36.4 17,55
.9 B40,000
672,000 2,800 4,480 504,100
2,101 3,360 59.3 40.8 20,06
10
945,000 756,000 3,150
5,040 567,100 2,363
3,780
65.7
45,2^
22.57
11 1,050,000 840,000 3,500 5,600 630,200
2,626 4,200 72.1 49.6 25.07
12 1,155,000 924,000 3,850
6,160 693,200 2,888 .
4,620 !
78.5
54.0. :27.58
13 1,260,000 : 1,008,000 4,200 ' 6,720 756,200
3,151
• 5,040 ;
84.9 58.4 30.09
14 1,365,000
1,092,000 4,550 7,280 819.200 3,413 1 5,460
91.3 62.8 32.60
.15 1,470,000 1,176,000 4,900 7,840 862,200
3,676'
’5,880 1Q4.1
71.6 35.10
17 1,630,000
1,344,000
5,600 8,960 1,015,100 4,230 8,767,
116.9 80.4 40.12
' ■ 19
1,890,000 1,512,000 6,300 - 10,090 1,155,100
4,813 7,700 129.7 89.2 45.13
21
2,100,000 1,680,000'
7,000
11,200
1,295,300 5,397 '
8,635 142!5 ;
98,Q, 50,15
23 2,310,000 1,848,000 7,700 12,320 1,432,600 :
5,369 • 9,550 ■ 155.3 106.8 ;>< : 5 5.16
25 2,520,000 2,016,000
8,400 . 13,440 1,565,200 6,522 i ■ 1 0 ,435 168.1 ;
■ 115.6' .60.18 ,i
:• 27 ; 2,730,000.
2,184,000
* 9,100 14,560 1,695,700
7,065 11,305 180.9 124.4" • 65.19 >.
29 2,940,000 2,352,000
9,800 15,680 1,826,100 7,609 12,175 193.7
133.2 •
70-21
31 3,150,000 2,520,000 10,500 16,600 1,956,500
8,152
13,045 206.5. 142.0 75.22
: 3 3' 1 ■ '
3,360,000 2,636,000 1.1,200
17,920 2,087,000 8,696 13,913 21.9.3 150.8 80.24
( 1 ) All rating for sea level to .2,000 feet- For altitudes over 2,000 feet, reduce all ratings by 4% for each 1,000 feet above sea level,
(2) Selection factors providing for piping and pickup are those recommended by I.B.R
"(3) Ratings hre abased on ,33,500 Btuh per horsepower. ’
Note: Units’may be twinned, back-to-back, to provide units to 6,720,000-Btuh input. .. F;
i
All air from outdoors:
The confined space shall be provided with two per¬
manent openings, one in or near the tqp of the en-
. closure and one in or near the bottom.. The openings
/ . shall communicate, directly, or by means of ducts,--with
/.outdoors or to such Spaces (crawl, or attic), that freely
communicate with, outdoors. n ■
When directly communicating with outdoors, or by
means of vertical ducts, each opening shall have a free
area of not less than 1 sq ill. per 4,000 Btuh of total
—inputT rating-of-alh-appliances^in-the- enclosurer-If^
Horizontal ducts are used, each opening shall have a
free area of not less than,!, sq in. per .2,000 Btuh of
total input of alb appliances in the enclosure.
Ducts shall be of the' same cross-sectional area as the
free area of the openings to which they connect. The
minimum dimension of rectangular air ducts shall be
not less than 3 inches.
Minimum clearance from combustibles is 6 inches on
all sides including the top and draft diverter. Check
local boiler codes to see if this distance conforms to
their requirements. ■
It is recommended that a minimum clearance of 24
inches be maintained in front and on the control end
of the boiler for servicing.
ASSEMBLING THE BASE,
The 4-, 5- and 6-section boilers each have individual
bases. The 4-section base has 6 burners, the 5-sectioh
base has' 8 .burners, and the 6-section b asqdias/10'bur¬
ners.* **.' r . ——
To assemble any boiler larger than 6 sections some
combination of the above three bases must be used.
Follow Table III in order for the gas manifold header
piping to fit, . > ■ ’ '
The bases are fastened together with 5/16-inch cap
Figure 3 - Boiler Boses Size 4, 5, & 6
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TABLE III
Boiler Size
No. of Sections
Number
of Bases
Number of Burner3‘ , ‘
Per Base-Left-tO”Rinht
4
1 6
5 1 8
6 1 10
7 2 6-6
. 8
a
6-8
9 2 8-8
10 2 8-10
11
2 10-10
12 3 6-8-8
13 3
8-8-8
.. 14
. 3 6-10-10
■ 15
3 8-10-10
17 4 8-8-3-8
19
4 6-10-10-10
21
4 10-10-10-10
23 5
6-8-10-10-10
25
5 9-10-10-10-10
' ■ • 27
■ 6 '
6-6-10-10-10-10
29
:B
6-10-10-10-10-10
31
6 10-10-10-10-10-10
33
7
6-8-10-10-10-10-10
^Reverse base order if controls are on the left en.d-
• and two in the rear posts as shown in Figure 4. Make
sure the back casing .supports .are mounted on each
' base as shown, in Figure 4.
ASSEMBLING THE BOILER SECTIONS
Steam Risers
Steam risers are not required on small sized boilers.
On boiler sizes 21 through 29, one riser is required, On
boiler sizes 31 and 33, two riser sections are required.
Refer to Figure 6 and Table IV for specific locations.
Figure 6 - Steam Riser Section Location
After the bases are fastened together, install the end
closing plates and the two back corner casing sup¬
ports, See Figure 5. The end closing plate is fastened
to the base by four 5/16-inch cap screws.
CAP SC RE
rf AND 'B,
BACK CASING .SUPPORT
TABLE IV
Boiler
Size
^First/Riser Section V
Location from Left
End. of Boiler
21 '
T' ' : 13th
23 ■ 15th-
25 .?
/ 12th : ■
,'•27 . :14th
23 :
16th
m Ht
13th
10th
*Second Riser Section
Location from Loft
End of Boiler
* Locations must be held; otherwise, the top cover would not Fit
properly.
Start the assembly with a left end battery. A battery
consists of .two sections factory assembled. Make sure
the first battery is lined up even with the left end of
the :baSe. See Figure 7. v ■■■■ . . .
Figure 4 - Rear View of Boiler Bases
. ......... ... . ^
•..fe '
LERF-END-BATFERY-
IN PLACE
Figure 5 - Installing End Closing Plate
Figure 7

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Boiler sections should be assembled on the base so
they follow close to the flange on the front of the base
in order that the outer casing will fit properly.
Clean both nipple ports on the left end battery and
coat them, with the red lead furnished. Clean and coat
two nipples with red lead; then tap the nipples into
the ports making sure they are square with the sec¬
tion. See Figure 8.
Figure 8
Set the intermediate battery on the boiler base and
clean and coat the nipple ports; then slide it up to the
first battery. A pair of manual pull-up tools or the
hydraulic assembly tool must be used to pull the bat¬
teries together.
2. Place pull-up guide on bolt and slide into position
next to clamp. This centers clamp in port and causes
it to assume a right-angle position with pull-up bolt.
See Figure 11,
against face of nipple port. Place film of oil on pull-up
bolt before putting nut and washer on.
4. Before tightening nut, jiggle pull-up tool to make
sure both clamp and clamp bar are properly
positioned, V;
5. Work alternately with One pull-up tool and then
other so batteries can be drawn up -uniformly. When
metal-to-metal contact is made around both upper
and lower nipple ports, pull-up is complete. Do not
pull up beyond this point.
6. Remove pull-up tools by removing nut, washer, and
The following instructions are for the manual pull-up
tool only. See Figure.'9. If the hydraulic assembly tool
is used, order installation instruction number
39246D6. " ■ ' ;v : .... A'...' ■ h. > ■■■ •'
wMimm
m&mf
mm
■ ^RDENEI
■ HbI
Figure 9 A6 ^ 27
To use the manual pull-up tools:
1* Insert one pull-up clamp and bolt through front
nipple port of intermediate battery until it is beyond
the nipple of left end battery. Insert second pull-up
tool, in rear nipple port in same manner. See Figure
10. ■■■ '".A ■ .
clamp bar; then with a wire hook, remove guide and
tilt clamp so tool can be removed from nipple port.
Continue to add batteries in the above manner until
the assembly, ds complete, then insert tie rods in the
section lugs matching, the length of the tie rod with
the base. '
On multiple base boilers, insert the tup cover supports
between the lug nuts and washers directly above the
joints in the bases. Fasten the tie rods in place with
the flat washers, lockwashers, and huts furnished. See
Figure 12. • . \
V' • • V •.

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Apply boiler putty at the junction of all batteries,
front, back, and top- Putty should also be applied
around the sections where they join the base.
Hydrostatic test the boiler in accordance with ap¬
plicable codes:
a. Plug all openings with exception of an air vent in
top of one end section, such as tapping G in Figure 13.
■ b . Fill boiler with water until it runs out of air vent;
then plug air vent.
c. Check for water leaks before continuing assembly*
Figure 13 - Tappings in End Section for
Steam and Water Controls
A6543Q
Figure 14
Note: Additional flue collar adapters will be shipped
in the fitting package. These adapters, in 9- and 10-
inch sizes, are used to standardize the vent pipe where
more than one flue collar size is used on the same
boiler.
MANIFOLD AND PILOT HEADER ASSEMBLY
When assembling boiler sizes 4, 5, or 6, follow steps 1
and 2 listed below. On boiler .sizes 7 through 33, refer
to the manifold header chart. For the placing of
various lengths of pipe and fittings, follow steps 1
through 7:
•v;:T irgsT ^ LL | N G : THE ; : DRAFT/HOOP^ ; ^^ : "-
The draft diverter comes -completely assembled and
packaged in .individual draft; hood, packages. The
■ d raft diverters are the same size as . the boiler bases.
To assemble the draft hood, see- Figure .14. "
1. Apply boiler putty to top of boiler - section before
mounting draft hood assembly. '•> ,
2. Place draft hood assembly, bn boiler section,
making sure there is enough boiler .putty between
boiler section and draft hood to assure a tight seal on
sides .and ends,.- '. - . ; ,
3. Fasten' draft hood securely with hook bolts,
washers, and nuts furnished.
1 Figure 15
2. Add an elbow and tighten securely so inlet is
parallel to manifold. Install horizontal, nipple G
specified by manifold header chart.
3. On boiler sizes 7 through 33, continue manifold in¬
stallation by installing appropriate horizontal nipple
G as specified in manifold header chart, into first
elbow.
4. Slip specified dresser coupling on nipple. See
Figure 16.
5. Install next vertical nipple-and-tee combination as
indicated in manifold header chart. Tighten tee so
outlet lines up with, previously installed horizontal
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nipple and dresser coupling; install specified horizon¬
tal nipple H in outlet side of tee.
6. IMPORTANT 1 - Center slip-on type dresser
coupling over space between two horizontal nipples
and tighten securely. See Figure 17.
7. Repeat above procedure until the manifold assem¬
bly is complete. When completely assembled,
manifold should end with a horizontal nipple exten¬
ding beyond the base.
Figure 16
A6S433
- : Figure 17
Pilot Header Connections , : / ; : . kc
.A':-'/Each boiler base has one pilot. The pilots are assem¬
bled in each base at the factory and are located as
follows: : ;
6 burner base - 3rd burner from right.
8 burner base - 4th burner from right
10 burner base - 6th burner from right
_Onall boilers of two or more bases, the.,pilots.must.b.e„
connected by a tube header consisting of the following
size:
Propane gas - 1/4-inch tube for all sizes.
Natural gas - 1/4-inch tube up to boiler size 23;
3/8-inch tube on boiler sizes 23
through 33.
To assemble pilot header:
1. Install elbow to pilot tube on base opposite control
end.
2. Run pilot tube along manifold header connecting
each pilot to tube with a tee.
3. Continue this procedure to complete pilot header
assembly, then tape pilot tubing to bottom of
manifold header.
NOTE: On natural gas, some'utilities require a pilot
filter. Check with, your local utility.
INSTALLING CASING PANELS
To install tire casing panels: : ::
1. Place top of back casing panels under flange on
draft diverter baffle and bottom of back casing panels
into rear casing supports. See Figure 18.
Figure 18
-2.-Place screws through flange of draft diverter--into
back casing panel.
3. Position end casing panels by placing bottpm rear
corner flange in slot of rear casing support.
4. Place screws into end panel through holes provided
in draft diverter and manifold bracket.
5. Install rating plate (2 pieces) on end panel where
controls will be located.
6. For steam boilers, attach water line plate in fac¬
tory punched holes in panel behind glass gauge on
control end of boiler.
7. Fasten top cover to end of casing panels with two
screws and nuts, furnished. On boiler sizes 7 and
above, a top cover support is supplied and installed on
tie rods as shown in Figure 19.
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A65435
Figure 19
. Adjust draft hood dips and top cover supports on tie
rods so top covers line up with end panels and front
covers .are even across top and front Tighten nuts on
tie rods and screws holding top covers to top supports
so top covers are.held firmly in place. ,
'i' ■ - ‘i • ' ™ "i : fY'r i. } ■ &•[/£
BOILER HEADER
AND PIPING INSTALLATION.
Complete the boiler piping (water or steam lines),
paying particular attention to the following recom¬
mendations -for steam boilers., ’: Y vVj' '
1. R eturn must be piped to both ends of boiler.
Boiler Size Dimension A
•4 through 19*
4 inches;-"
2f through 29
• /6 indhes A
31 and 33 'YB- inches
^RELIEF VALVE 15 LBS PS!
2. Minimum steam header proportions should be as
shown in Figure 22,
3, Add skimmer tee as shown in Figure 22,
Note; Never install a shutoff or steam valve between
the pressure relief valve and tire boiler.
On low-pressure boilers, the ASME Code requires
that a pressure relief valve be installed. The valve
discharge capacity in pounds per hour must be at
least equal to the output of the boiler, The capacity of
the boiler in pounds of steam per hour can be deter¬
mined by dividing the boiler output in Btuh by 1000,
For power or process purposes, use the fpllowing for¬
mula;
input
equals pounds of steam per hour
1333
STEAM AND WATER TRIM CONTROLS
Steam Controls
The steam controls for boiler installation consist of
the following components. See Figures 23 and 25.
1. Low-water cutoff (mounted, externally) with blow-
off valve,.
2. High-pressure limit control.
3. Compound jpressurefvacuuro gauge. •
4. Water gauge glass set.
5. Siphon, '
6. 15-psig pressure relief valve.
*The 4, 5, & 6 section 246 may be piped with a
single riser if the croas-fiectional area of the
existing Steam supply .'system is not more than
the single :’4-inch riser area from .the boiler.
IF SIDE OUTLET RELIEF
VALVE IS USED, PIPE TO
WITHIN 6" OF-FLOOR
n!
; .p.
24
' ^
4^
^'SKIMMER
TAPPING
1 INCH
(Uf—
ZJ
BE
RETURN
PIPED TO
DOTH ENDS
OF BOILER ■
SIZED FOR DISTRIBUTION SYSTEM
TO DISTRIBUTION
SYSTEM
!—OPTIONAL
SKIMMER
W LOCATION
ySj 1 INCH
./TOTAL CROSS-
r SECTIONAL
AREA OF
RETURN LINES
SUGGESTED STEAM HEADER PIPING 246 BOILER
EQUALIZER MAY BE INSTALLED
AT EITHER END OF BOILER
AeS317
Figure 22
— S —

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G
10 -
NOTE:
To
change
gas
controls
to
left
and
of
bailor,
change
the
lengths
of
the
horizontal
nipples
and
reverse
all
nipple,
between
tees
and
manifold.
NOTE:
All
nipples
connected’
to
dresser
couplings
are
threaded
one
end
only.