Instruction Manual

ManualsBrandsBell & Gossett ManualsAccessories for waterHT 205B SM Models ACA Straight Tube, Removable Bundle Heat Exchangers

BELL & GOSSETT

SERVICE MANUAL

HT-205B-SM

Bell & Gossett

Morton Grove, IL, U.S.A.

Installation, Operation and

Maintenance Manual for

Models OC, GC & ACA Straight Tube,

Removable Bundle Heat Exchangers*

*Also includes procedures for MEA & MEAH tube bundles.

INSTALLER: PLEASE LEAVE THIS MANUAL FOR THE OWNER’S USE.

SAFETY

INSTRUCTION

This safety alert symbol will be used in this manual to draw

attention to safety related instructions. When used, the safety

alert symbol means ATTENTION! BECOME ALERT! YOUR

SAFETY IS INVOLVED! FAILURE TO FOLLOW THESE IN-

STRUCTIONS MAY RESULT IN A SAFETY HAZARD.

Summary of content (8 pages)

PAGE 1
BELL & GOSSETT SERVICE MANUAL HT-205B-SM Installation, Operation and Maintenance Manual for Models OC, GC & ACA Straight Tube, Removable Bundle Heat Exchangers* *Also includes procedures for MEA & MEAH tube bundles. INSTALLER: PLEASE LEAVE THIS MANUAL FOR THE OWNER’S USE. SAFETY INSTRUCTION This safety alert symbol will be used in this manual to draw attention to safety related instructions.
PAGE 2
INSTALLATION 1. Provide sufficient clearance at the stationary tube sheet end of the unit to permit removal of tube bundles from shells. On the packed floating tube sheet end, a space of 3 or 4 feet should be provided to permit the removal of the rear head, packing and retainer rings. 2. Provide valves and by-passes in the piping systems so that both the shells and tube bundles may be by-passed to permit cutting out the unit for inspection or repairs. 3.
PAGE 3
OPERATION 1. When placing a unit in operation, open the vent connections and start to circulate the cold medium only. Be sure that the passages in the exchanger are entirely filled with the cold fluid before closing the vents. The hot medium should then be introduced gradually until all passages are filled with liquid, close vents and slowly bring the unit up to temperature. 2. Start operation gradually. Do not admit hot fluid to the unit suddenly when empty or cold.
PAGE 4
CAUTION: Failure to follow the procedures mentioned in steps 8a, b, and c may result in damage to the tubes or tube joints leading to premature failure of the heat exchanger. 9. Removing the tube bundle: Refer to drawings on pages 6 and 7 giving part names of models MEAH, OC, GC and ACA. The model MEAH tube bundles are more difficult to remove than the other models.
PAGE 5
10. Replacing the tube bundle: The tube bundles for models ACA, GC, MEA, MEAH and OC (the packed floating tube sheet units) can be replaced using the tools and reverse procedure given for bundle removal. Usually, the bundles ACA, GC, MEA and OC, can be shoved back into the shell (C) manually without the use of the chain jack. It may be necessary to use the chain jack when replacing MEAH bundles.
PAGE 6
A B K LIQUID OUTLET FOR MEAH N M O C – – – – – – – – (BONNET HEAD) FRONT HEAD STATIONARY TUBE SHEET SHELL SADDLES PACKED FLOATING TUBE SHEET REAR HEAD PACKING PACKING RETAINER RING (SEE PACKING RETAINER DETAIL) ONLY MODELS MEAH HAVE HORIZONTAL BAFFLES.
PAGE 7
PACKING RETAINER DETAIL SHELL ASSEMBLY BONNET TUBES PACKING RING (3 RINGS REQ.) 3" UNIT DIAMETER ONLY WEEP HOLE PACKING RETAINER RING PACKING RETAINER RING ASSEMBLY SHELL ASSEMBLY BONNET TUBES UNIT DIAMETER 4" THRU 12" (TWO PIECE PACKING RETAINER PACKING RING (4 RINGS REQ.) PACKING RETAINER RING (ONE PIECE) WEEP HOLE SHELL ASSEMBLY BONNET OR CHANNEL ASSEMBLY TUBES PACKING RING (4 RINGS REQ.
PAGE 8
MODEL OC THIS TWO PASS TYPE OF MODEL OC IS REPRESENTATIVE OF THE MODELS MEA, ACA, GC AND MEAH TUBE BUNDLE (PARTIALLY REMOVED) FRONT HEAD HEAD GASKET TANK GASKET SHELL ASSEMBLY PACKING (ONE SET NEEDED) NAMEPLATE ADJUSTABLE STEEL SUPPORT LEGS REAR HEAD PACKING RETAINER RING PACKING RETAINER RING ASSEMBLY WITH SQUARE BAR STOCK SEPARATOR When ordering replacement parts give names of part, catalogue and factory number from nameplate.