Boiler User's 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

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Form No. 3710 (Rev.
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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 E L A J I 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.
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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.
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Bryan DR Series Steam & Hot Water Boilers FRONT VIEW PLAN VIEW Boiler Model Number DR250-S* DR350-S DR450-S DR650-S DR850-S A Overall Length 62 1/8 (157.80) 62 1/8 (157.80) 62 1/8 (157.80) 73 1/2 (186.69) 73 1/2 (186.69) B Floor to Flow Nozzle C Width Outside Jacket 74 5/8 (189.54) 74 5/8 (189.54) 74 5/8 (189.54) 74 5/8 (189.54) 74 5/8 (189.54) 33 13/16 (85.88) 33 13/16 (85.88) 33 13/16 (85.88) 33 13/16 (85.88) 33 13/16 (85.88) 32 3/8 (82.23) 32 3/8 (82.23) 32 3/8 (82.23) 43 3/4 (111.