Bryan Boilers DR850-W-FDGO, DR350-S150-FDG User Manual

Bryan “Flexible Water Tube”

DR Series

Steam & Water Boilers

250,000 to 850,000 BTUH

Forced Draft Gas, Oil or Dual Fuel Fired

Form No. 3710

(Rev. 6/04)

Steam Boiler

DR350-S150-FDG

Water Boiler

DR850-W-FDGO

Originators of the “Flexible Water Tube” design

Low initial cost, high operating efficiency
deliver substantial return on investment

• True “flexible water

tube” design

• High quality steam for

heat or process

• Pressurized firing for

high efficiency

A. Water side or steam side interior accessible for

cleanout and inspection, front and rear openings, up­per and lower drums.

B. Large volume water leg downcomers promote rapid
internal circulation, temperature equalization and effi­cient 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. Effi­cient combustion of oil or gas, quiet operation.

H. Heavy steel boiler frame, built and stamped in accor­dance 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 re­placeable without welding or rolling. Never more than two
tube configurations.

A

J

I

B

M

K

H

K. Internal water-cooled
furnace with low heat re­lease 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 con­structed of heavy gauge
steel, completely sealed,
lined with high temperature
insulation and refractory.

E

L

F

C

G

D

Bryan DR Series Boiler Specifications

BOILER

MODEL

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)

NOTES: (1) W = Water / S = Steam

INPUT

MBH

(1)

(KW)

(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.

OUTPUT@ 80%

EFFICIENCY

MBH (KW)

(2)

HP (KW)

OUTPUT@ 83.5%

EFFICIENCY

MBH (KW)

(3)

HP (KW)

STEAM OUTPUT

LBS/HR (KG/HR)

(4)

HEATING

SURFACE

SQ. FT. (M2)

APPROX.

SHIP

LBS. (KG)

Guaranteed high efficiency performance and
easy maintenance insure low cost operation

All Bryan DR Series boilers offer these operating and performance features

Guaranteed efficiency

The breakthrough in water tube boiler design that produced
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 re­movable and replaceable,
without welding or rolling,
eliminating long, expensive
downtime should repairs
ever be required.

Water cooled furnace

Water
Boiler

The configuration of the wa­ter 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 breach­ing 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 possi­bility of “cold spots” and damage from corrosive conden­sation.

Positive internal
circulation

Steam

Boiler

Each pass of the Bryan
water tube slopes up­ward. This configuration,
along with the large vol­ume down-comer water
legs, provides the ex­tremely rapid natural ther­mal internal circulation, pro­moting both high efficiency
of heat transfer and uniform
temperature throughout the
boiler. Eliminating stress damage
caused by unequal temperature distribu­tion is especially important for heating systems, particu­larly where intermittent or continuous low temperature
water returns may be encountered.

Bryan DR Series Boilers Standard and Optional Equipment

STANDARD EQUIPMENT FURNISHED

Water boiler

Combination thermometer and altitude
gauge, ASME Code rated boiler relief
valve, water temperature control (240°F
max std.), high limit control, probe
LWCO.

Steam boiler

Steam pressure gauge, steam pres­sure control, combination low water
cutoff and pump control, auxiliary low
water cutoff, high limit pressure con­trol, 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
main gas pressure regulators, air safety

switch, control panel, all controls in­stalled and wired.

Straight oil fired unit

Electronic combustion safety control,
dual oil valves oil ignition transformer,
two-stage fuel unit, direct spark ignition
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
main gas pressure regulators, air safety
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.

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 insur­ance 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:

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 tempera­tures exceeding 240° F and/or pressure
exceeding 160 psi to maximum of 285°
F operating and 300° F design tempera­ture and 250 psi.

When ordering, please specify:

1. Boiler size

2. Supply and return tempera­tures 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

Bryan DR Series Steam & Hot Water Boilers

PLAN VIEW

FRONT VIEW

STEAM BOILER DIMENSIONS in inches (cm)

Boiler
Model

Number

DR250-S*

DR350-S

DR450-S

DR650-S

DR850-S

NOTE: Dimensions subject to change without notice. Consult factory for certified dimensions.

A B C D E F G H I J K L

Overall
Length

(157.80) (189.54) (85.88) (82.23) (182.25) (2.54) (7.62) (5.08) (15.24) (32.54) (60.96) (76.20)

(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)

(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)

Floor to Widt h Length Height Gas Train Supply Nozzle

Flow Ou tsi de of Over Connection

Nozzle Jacket Jacket Jacket (Approx.)

62 1/

8

74 5/

8

33 13/

16

62 1/

62

73

32 3/871 3/

8

74 5/

8

33 13/

16

32 3/871 3/

1

/

8

74 5/

8

33 13/

16

32 3/871 3/

1

/

2

74 5/

8

33 13/

16

43 3/471 3/

4

4

4

4

1

1 3 3 2 6 12 13/

1 3 3 2 6 12 13/

1 4 4 2 8 12 13/

(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)

73 1/

2

74 5/

8

33 13/

16

(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)

* Not intended for use as a principal heating source for the living space of an individual residence.
** Not available in 15 psi construction.

43 3/471 3/

4

1 4 4 2 8 12 13/

L

15 psi 150 psi

NA**

3 2 6 12 13/

W

IE

V

E

ID

S

T

F

E

Return Flue Flue

Conn. Size Location

V

R

A

E

R

Min. Tube Clearance

Removal for Servicing

Clearance Burner

16

16

16

16

16

24 30

24 30

24 30

24 30

24 30

W

IE

PLAN VIEW

FRONT VIEW

WATER BOILER DIMENSIONS in inches (cm)

Boiler
Model

Number

DR350-W

DR450-W

DR650-W

DR850-W

Specifications subject to change without notice. Consult factory to consult on other boiler options.

ABCDE F GHI J K L

Overall
Length

62 1/

(157.80) (172.40) (81.60) (82.23) (168.59) (2.54) (5.08) (5.08) (15.24) (32.54) (60.96) (76.20)

62 1/

(157.80) (172.40) (81.60) (82.23) (168.59) (2.54) (5.08) (5.08) (15.24) (32.54) (60.96) (76.20)

73 1/

Floor to Width Length Height

Flow Ou tsi de of Over

Nozzle Jacket Jacket Jacket Clearance Burner

8

67 7/

8

32 1/

8

32 3/

8

66 3/

8

67 7/

8

32 1/

8

32 3/

8

66 3/

2

67 7/

8

32 1/

8

43 3/

4

66 3/

Gas Train Supply Return Flue Flue

Connection Nozzle Nozzle Size Location

8

8

8

1 2 2 6 12 13/

1 2 2 6 12 13/

1 2 2 8 12 13/

(186.69) (172.40) (81.60) (111.13) (168.59) (2.54) (5.08) (5.08) (20.32) (32.54) (60.96) (76.20)

73 1/

2

67 7/

8

32 1/

8

43 3/

4

66 3/

(186.69) (172.40) (81.60) (111.13) (168.59) (2.54) (5.08) (5.08) (20.32) (32.54) (60.96) (76.20)

8

1 2 2 8 12 13/

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: [e-mail]

LEFT SIDE VIEW

REAR VIEW

Min. Tube Clearance for

Removal Servicing

16

16

16

16

24 30

24 30

24 30

24 30

Form No. 3710 ©2004 Bryan Steam LLC Printed in USA

64-6166