Bryan Boilers DR350-W User manual

Steam Boiler
DR350-S150-FDG
Form No. 3710
(Rev. 6/04)
Originators of the “Flexible Water Tube” design
Bryan “Flexible Water Tube”
DR Series
Steam & Water Boilers
250,000 to 850,000 BTUH
Forced Draft Gas, Oil or Dual Fuel Fired
Water Boiler
DR850-W-FDGO

Low initial cost, high operating efficiency
deliver substantial return on investment
K. Internal water-cooled
furnace with low heat re-
lease rate.
L. Steam boilers with extra
large drum with high steam
release area ensure stable
water level and dry steam.
M. Pressurized design:
inner fireside casing con-
structed of heavy gauge
steel, completely sealed,
lined with high temperature
insulation and refractory.
A. Water side or steam side interior accessible for
cleanout and inspection, front and rear openings, up-
per and lower drums.
B. Large volume water leg downcomers promote rapid
internal circulation, temperature equalization and effi-
cient heat transfer.
C. Boiler tube and furnace area access panel: heavy
gauge steel-lined with high temperature ceramic fiber
and insulation, bolted and tightly sealed to boiler frame.
D. Single side access; combustion chamber, tubes and
burner head are completely accessible from one side
simplifying maintenance and minimizing floor space.
E. Minimum sized flue vent.
F. Control panel: all controls installed with connections to
terminal strip.
G. Forced draft, flame retention head type burner. Effi-
cient combustion of oil or gas, quiet operation.
H. Heavy steel boiler frame, built and stamped in accor-
dance with the appropriate ASME Boiler Code.
I. Heavy gauge steel boiler jacket with rust-resistant zinc
coating and enamel finish, insulated with fiberglass to
insure exceptionally cool outer surface.
J. Bryan bent water tubes are flexible, individually re-
placeable without welding or rolling. Never more than two
tube configurations.
•True “flexible water
tube” design
•High quality steam for
heat or process
•Pressurized firing for
high efficiency
AL
F
G
D
K
B
C
J
E
M
H
I
Bryan DR Series Boiler Specifications
DR250-S 250 (73) 200 (59) 6 (59) — — 206 (93) 66 (6.1) 1,150 (522)
DR350-W 350 (103) 280 (82) 8 (82) 292 (86) 9 (86) — 66 (6.1) 1,150 (522)
DR350-S 350 (103) 280 (82) 8 (82) — — 288 (131) 66 (6.1) 1,150 (522)
DR450-W 450 (132) 360 (106) 10 (98) 376 (110) 11 (110) — 66 (6.1) 1,150 (522)
DR450-S 450 (132) 360 (106) 10 (98) — — 371 (168) 66 (6.1) 1,150 (522)
DR650-W 650 (190) 520 (152) 15 (147) 543 (159) 16 (159) — 103 (9.6) 1,650 (748)
DR650-S 650 (190) 520 (152) 15 (147) — — 536 (243) 103 (9.6) 1,650 (748)
DR850-W 850 (249) 680 (199) 20 (196) 710 (208) 21 (208) — 103 (9.6) 1,650 (748)
DR850-S 850 (249) 680 (199) 20 (196) — — 701 (318) 103 (9.6) 1,650 (748)
BOILER
MODEL(1)
INPUT
MBH
(KW)
OUTPUT@ 80%
EFFICIENCY(2)
MBH (KW) HP (KW)
OUTPUT@ 83.5%
EFFICIENCY(3)
MBH (KW) HP (KW)
STEAM OUTPUT(4)
LBS/HR (KG/HR)
HEATING
SURFACE
SQ. FT. (M2)
APPROX.
SHIP
LBS. (KG)
NOTES: (1) W = Water / S = Steam
(2) Output and horsepower based on boiler industry standard of 80% of input.
(3) Output and horsepower based on an average natural gas combustion efficiency of 83.5% for hot water boiler. Actual combustion efficiencies for oil will be higher.
(4) Lbs. steam per hour from and at 212°F.

Guaranteed high efficiency performance and
easy maintenance insure low cost operation
All Bryan DR Series boilers offer these operating and performance features
Guaranteed efficiency
Thebreakthroughinwatertubeboilerdesignthatproduced
the DR Series provides operating efficiency so reliable,
we guarantee it to be 83.5% for hot water boilers and
82.5% (15 psi) or 80% (150 psi) or better for steam boilers.
The Bryan Flexible Tube
Bryan’s exclusive “Flexible Tube” design
eliminates the possibility of damage
from so-called “thermal
shock.” Tubes are easily re-
movable and replaceable,
without welding or rolling,
eliminating long, expensive
downtime should repairs
ever be required.
Water cooled furnace
The configuration of the wa-
ter tubes provides a water
cooled combustion cham-
ber. A high percentage of
the heating surface is exposed to direct radiant heat,
increasing water velocities and heat transfer.
Large steam drum
The steam drum has generous water volume and steam
release area. This design, along with effective drum
internal functions, results in a stable water level and
produces extremely dry steam at all load conditions.
Accessibility of furnace and tube area
Inner panel provides easy and complete access to furnace
and boiler tube area, as well as to burner head. All panels
are heavily insulated and sealed to boiler frame. All access
is from only one side.
Compact design, minimum floor space
With our compact water tube design, the overall size of the
unit is less than most other types of boilers. Needing only
24" for tube removal, and on only one side of the boiler, the
DR Series boiler occupies very little space in the boiler
room. This can result in considerable savings in building
costs. Pressurized firing permits minimum sized breach-
ing and vent.
Multi-pass flue gas travel
High velocity four-pass flue gas travel is obtained by a
unique baffling system. This contributes to maximum fire
side heat transfer and overall high boiler efficiencies.
Thermal blend water return
Bryan’s unique “thermal blend” return blends cold or
cooler return water with warmer boiler water abridging it
to design operating temperatures. An injector tube directs
the “mixed” water flow through the downcomer to the
lower header and heating surfaces at a temperature above
possible condensing conditions. This reduces the possi-
bility of “cold spots” and damage from corrosive conden-
sation.
Positive internal
circulation
Each pass of the Bryan
water tube slopes up-
ward. This configuration,
along with the large vol-
ume down-comer water
legs, provides the ex-
tremelyrapidnaturalther-
mal internal circulation, pro-
moting both high efficiency
of heat transfer and uniform
temperature throughout the
boiler. Eliminating stress damage
caused by unequal temperature distribu-
tion is especially important for heating systems, particu-
larly where intermittent or continuous low temperature
water returns may be encountered.
OPTIONAL EQUIPMENT,
EXTRA COST
1. Manual reset high limit control
2. Manual reset low water cutoff
3. Auxiliary low water cutoff
4. Combination low water cutoff
and feeder
5. Alarm bells or horns
6. CSD-1, FM, IRI or other insur-
ance approved control systems
7. Indicating lights, as desired
8. Lead-lag systems for two or
more boilers with or without
outdoor reset control
9. Draft control system
OPTIONAL CONSTRUCTION:
When ordering, please specify:
1. Boiler size
2. Supply and return tempera-
tures required
3. Boiler relief valve setting
4. Type of fuel: natural, LP, or
other gas and/or No. 2 oil
5. If gas, type, BTU content,
specific gravity and pressure
available
6. Electric power voltage, phase
and frequency
7. Optional extra equipment or
construction
8. Special approvals required
(UL, CSD-1, FM, or IRI)
9. Altitude
Steam boiler
Optional construction to ASME Power
Boiler Code requirements for pressure
exceeding 150 psi to maximum of 300
psi design pressure.
Hot water boiler
Optional construction to ASME Power
Boiler Code requirements for tempera-
turesexceeding240°Fand/orpressure
exceeding 160 psi to maximum of 285°
Foperatingand300°F designtempera-
ture and 250 psi.
Bryan DR Series Boilers Standard and Optional Equipment
STANDARD EQUIPMENT FURNISHED
Water
Boiler
Steam
Boiler
Water boiler
Combinationthermometerandaltitude
gauge, ASME Code rated boiler relief
valve,watertemperaturecontrol(240°F
max std.), high limit control, probe
LWCO.
Steam boiler
Steam pressure gauge, steam pres-
sure control, combination low water
cutoff and pump control, auxiliary low
water cutoff, high limit pressure con-
trol, ASME-rated safety valve, water
glass set.
Straight gas fired unit
Electronic combustion safety control,
automatic operating gas valve, safety
gas valve, pilot solenoid valve, pilot
ignition assembly, main manual gas
shut-off valve, pilot cock, pilot and
maingaspressureregulators,airsafety
switch, control panel, all controls in-
stalled and wired.
Straight oil fired unit
Electronic combustion safety control,
dual oil valves oil ignition transformer,
two-stagefuelunit,directsparkignition
of oil, oil nozzle assembly, control
panel, all controls installed and wired.
Combination gas-oil unit
Electronic combustion safety control,
automatic operating gas valve, safety
gas valve, pilot solenoid valve, pilot
ignition assembly, main manual gas
shut-off valve, pilot cock, pilot and
maingaspressureregulators,airsafety
switch, manual fuel selector switch,
dual oil valves, gas pilot for both fuels,
two-stage fuel unit, nozzle assembly,
control panel, all controls installed and
wired.

WATER BOILER DIMENSIONS in inches (cm)
ABCDE F GHI J K L
Boiler
Overall Floor to Width Length Height Gas Train Supply Return Flue Flue Min. Tube Clearance for Model
Length Flow Outside of Over Connection Nozzle Nozzle Size Location Removal Servicing
Number Nozzle Jacket Jacket Jacket Clearance Burner
DR350-W 62
1
/ 8 67
7
/ 8 32
1
/ 8 32
3
/ 8 66
3
/ 8 1 2 2 6 12
13
/ 16 24 30
(157.80) (172.40) (81.60) (82.23) (168.59) (2.54) (5.08) (5.08) (15.24) (32.54) (60.96) (76.20)
DR450-W 62
1
/ 8 67
7
/ 8 32
1
/ 8 32
3
/ 8 66
3
/ 8 1 2 2 6 12
13
/ 16 24 30
(157.80) (172.40) (81.60) (82.23) (168.59) (2.54) (5.08) (5.08) (15.24) (32.54) (60.96) (76.20)
DR650-W 73
1
/ 2 67
7
/ 8 32
1
/ 8 43
3
/ 4 66
3
/ 8 1 2 2 8 12
13
/ 16 24 30
(186.69) (172.40) (81.60) (111.13) (168.59) (2.54) (5.08) (5.08) (20.32) (32.54) (60.96) (76.20)
DR850-W 73
1
/ 2 67
7
/ 8 32
1
/ 8 43
3
/ 4 66
3
/ 8 1 2 2 8 12
13
/ 16 24 30
(186.69) (172.40) (81.60) (111.13) (168.59) (2.54) (5.08) (5.08) (20.32) (32.54) (60.96) (76.20)
PLAN VIEW FRONT VIEW
LEFTSIDEVIEWREARVIEW
Bryan DR Series Steam & Hot Water Boilers
Specifications subject to change without notice. Consult factory to consult on other boiler options.
Form No. 3710 ©2004 Bryan Steam LLC Printed in USA
64-6166
Bryan Steam LLC —Leaders Since 1916
783 N. Chili Ave., Peru, Indiana 46970 U.S.A.
Phone: [phone] • Internet: www.bryanboilers.com
Fax: [phone]
• E-mail: [email protected]
STEAM BOILER DIMENSIONS in inches (cm)
A B C D E F G H I J K L
Boiler
Overall Floor to Width Length Height Gas Train Supply Nozzle Return Flue Flue Min. Tube Clearance Model
Length Flow Outside of Over Connection Conn. Size Location Removal for Servicing Number Nozzle Jacket Jacket Jacket (Approx.) 15 psi 150 psi Clearance Burner
DR250-S* 62
1
/ 8 74
5
/ 8 33
13
/ 16 32
3
/ 8 71
3
/ 4 1NA** 3 2 6 12
13
/ 16 24 30
(157.80) (189.54) (85.88) (82.23) (182.25) (2.54) (7.62) (5.08) (15.24) (32.54) (60.96) (76.20)
DR350-S 62
1
/ 8 74
5
/ 8 33
13
/ 16 32
3
/ 8 71
3
/ 4 1 3 3 2 6 12
13
/ 16 24 30
(157.80) (189.54) (85.88) (82.23) (182.25) (2.54) (7.62) (7.62) (5.08) (15.24) (32.54) (60.96) (76.20)
DR450-S 62
1
/ 8 74
5
/ 8 33
13
/ 16 32
3
/ 8 71
3
/ 4 1 3 3 2 6 12
13
/ 16 24 30
(157.80) (189.54) (85.88) (82.23) (182.25) (2.54) (7.62) (7.62) (5.08) (15.24) (32.54) (60.96) (76.20)
DR650-S 73
1
/ 2 74
5
/ 8 33
13
/ 16 43
3
/ 4 71
3
/ 4 1 4 4 2 8 12
13
/ 16 24 30
(186.69) (189.54) (85.88) (111.13) (182.25) (2.54) (10.16) (10.16) (5.08) (20.32) (32.54) (60.96) (76.20)
DR850-S 73
1
/ 2 74
5
/ 8 33
13
/ 16 43
3
/ 4 71
3
/ 4 1 4 4 2 8 12
13
/ 16 24 30
(186.69) (189.54) (85.88) (111.13) (182.25) (2.54) (10.16) (10.16) (5.08) (20.32) (32.54) (60.96) (76.20)
PLAN VIEW FRONT VIEW LEFT SIDE VIEW REAR VIEW
NOTE: Dimensions subject to change without notice. Consult factory for certified dimensions.
* Not intended for use as a principal heating source for the living space of an individual residence.
** Not available in 15 psi construction.