The 14 gauge mounting bracket must be attached to the jacket first using four (4) #8 x %” drill point sheet metal screws. One may find it easier to install some of the conduit connectors with their corresponding conduit runs onto the RTC back panel before mounting to the bracket. The actual controller can and should be removed from the back panel during the mounting process. This will eliminate the potential for accidental damage to the controller. The RTC back panel is mounted onto the brack

They are constructed and hydrostatically tested for a maximum working pressure of 50 psi (pounds per square inch) in accordance with A.S.M.E. (American Society of Mechanical Engineers) Boiler and Pressure Vessel Code Section IV Standards for cast iron heating boilers. MODEL ABF-SPD Continuous Pilot MODEL ABF-EID Electronic Intermittent Ignition WARNING: Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. Refer to this manual. For assist

This manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible situation which may arise during installation, operation or maintenance. The information provided in this manual was deemed accurate as of the publication date. However, updates to this information may have occurred. To obtain the latest version of this manual, please visit the Crown website at Trademark Notice: Crown, Crown Audio, and Amcron are registered trad

Specifications 2 III. Before Installing 3 IV. Locating The Boiler 3 V. Mounting The Boiler 6 VI. Air For Ventilation 9 VII. Venting 11 A. Vent System Design 11 B. Removing An Existing Boiler From Common Chimney 21 C. Assembly of Crown 60/100mm Concentric Venting 22 D. Assembly of Crown 80/125mm Concentric Venting 26 E. Assembly of Stainless Steel Venting 35 F. Condensate Trap and Drain 40 VIII. Gas Piping 42 IX. System Piping 43 General System Piping Precaution 43 System Design 43 Standard Pipin

For assistance or additional informa• BSI172 • BSI310 • BSI345 tion, consult a qualified installer, service agency or the gas supplier. Read these instructions • BSI379 carefully before installing. Manufacturer of Hydronic Heating Products P.O. Box 14818 3633 I. Street Philadelphia, PA 19134 Tel: (215) 535-8900 • Fax: (215) 535-9736 • Table of Contents I. Product Description .................................................. 1 II. Specifications ..................................................

<*TCT ruse MM. THC LSl«anz$? «U. O^OUTC TX HMK ONtT f TKf »on 6W#t* IS CONNCCTCO (nuooco M). «UNC VOLTACC —LOW VOLTACC COLOR CQOC 6K-BUCK 8R-BR0WN 0 -ORANGE Y -YEU.OW R -RED VT-BLACK WITH WHTT TRACER w -wmcte G —CRttH ) IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THIS APPLIANCE MUST BE REPLACED, IT MUST BE REPLACED WITH TYPE 105° C THERMOPLASTIC WIRE OR ITS EQUIVALENT. 70112 13 Equipment and Optional Accessories - What They Do RELIEF VALVE You must have a relief valve on your boiler

WATER DESCRIPTION CROWN PART # QUANTITY HYDROLEVEL 550 LWCO 450560 1 L4006E1109 35-3100 1 3/4 LONG WELL 35-1020 1 B. STEAM GRAVITY RETURN DESCRIPTION CROWN PART # QUANTITY #64 LWCO 40-640 1 STEAM FITTING PACKAGE 332001 1 C. STEAM PUMPED RETURN DESCRIPTION CROWN PART # QUANTITY #150S-MD LWCO 40-160 1 STEAM FITTING PACKAGE 332001 1 D. STEAM FITTING PACKAGE DESCRIPTION CROWN PART # QUANTITY 3/4 BLACK EXTENSION 95-090 1 3/4 X 1/4 BRASS BUSHING 950016 1 90 DEG. BRASS PIGTAIL 95

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If the high limit setting is exceeded, relay coil 2K will be de-energized, turning off the burners and combustion fan. The circulator will continue to run until the call for heat is satisfied, regardless of the water temperature. 9) At the end of a burner cycle, the normally closed contacts on the vacuum switch should make after the fan is de- energized. If this does not happen, there will be no current path to relay coil 2K upon the next call for heat and the boiler will not fire. 10) The flame

wide n Multiple boiler systems provide increased turndown and even smoother, more efficient system operation n 4 boilers w/4:1 Turndown =16:1 total system turndown 40 100 140 VW/ VB-500 500,000 421,500 1,268 507 362 56 30 37.5 30 450 VW/ VB-750 750,000 633,750 1,901 761 543 62 30 37.5 30 575 VW/ VB-1000 1,000,000 845,000 2,535 1,014 724 71 30 37.5 30 750 With Ac-U-Temp, A. O. Smith makes it as easy as possible to install a complete packaged hot water supply system, combining 88% efficient VF Ser