Bock recommends a tempering valve or anti-scald valve be installed and used according to the manufacturer's directions to prevent scalding. 110 South Dickinson Street, Madison, Wisconsin 53703 Toll Free 800.794.2491 • Phone 608.257.2225• Fax 608.257.5304 80029 Rev 6/08 B

Flue Tubes: Flue tubes constructed of steel minimum, 1/8 in. thick, 6 in. OD by 35 in. long, and provided with fins welded in a spiral pattern. Model Number of Flues 150-400 3 200-450 3 150-600 5 200-650 5 150-800 7 200-850 7 200-1150 10 250-1250 12 250-1500 14 WARNING WARNING CAUTION WATER PIPING GAS PIPING OIL PIPING MOUNTING THE BURNER CONNECT TO THE CHIMNEY Improper installation, adjustment, alteration, service or maintenance can cause serious injury or property damage. Refer to this manual.

If hydrogen is present, an unusual sound – such as air escaping – will come from the open faucet as the hot water begins to flow. Hydrogen gas is extremely flammable – there must be no open flame near this open faucet. Bock Water Heaters, Inc. 110 S. Dickinson St. • P.O. Box 8632 • Madison, WI 53708-8632 Phone: 608/257-2225 • Fax: 608/257-5304 • SPECIFICATIONS Leave ample room for servicing when the water heater is installed – do not block access to the burner, inspection door, handholes or cont

Our liability, in the event of leakage or other malfunction, is strictly limited to repair or replacement of the defective heater or part, as provided herein. We are not responsible hereunder for incidental property damage or personal injury, consequential costs or damage. Equipment that is repaired or replaced will carry the unexpired portion of the original equipment warranty. Any burner and/or controls used on a Bock water heater other than the ones recommended by Bock Water Heaters Inc., and

TO THE CONSUMER: Read these and all component instructions. Please keep for future reference. Please remember to return the registration card. Waranty, registration card & parts list included. BOCK RESIDENTIAL OIL-FIRED WATER HEATERS Model numbers: 20e, 20pp, 32E, 32EC, 32PP, 32PPC, 33E, 33PP, 40E, 40PP, 50ES, 50ESC, 51E, 51EC, 51PP, 51PPC, 71E, 120E WARNING: Improper installation, adjustment, alteration, service or maintenance can cause serious injury or property damage. Refer to this manual. F

Please keep for future reference. Waranty, registration card & parts list included. INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS OIL-FIRED WATER HEATERS 72E • 73E • 190E • 241E • 361E • 541E WARNING: Improper installation, adjustment, alteration, service or maintenance can cause serious injury or property damage. Refer to this manual. For assistance or additional information, consult a qualified installer or service agency. WARNING: If the information in these instructions is not followed

Bock recommends 120°F temperature settings for residential applications for safety as well as energy efficiency. 1. Check the fuel supply, electrical wiring and fuses. Make sure the temperature control is set for heat. 2. If the motor runs but there is no flame, remove the electrode assembly, clean and readjust (see Figure 5). Check the electrode porcelain for cracks and replace if necessary. Check the transformer to see of it is producing a strong spark. (Use extreme caution – the transformer h

Handhole cover plate and gasket (for 50ES only) not shown. – 9 – ITEM DESCRIPTION 1. Cold Water Inlet Dip Tube (N/A 33E & 40E) 2. Plastic Cap 3. Magnesium Anode Rod (aluminum avaliable) 4. Name Plate/Rating Label 6. Immersion Well & Aquastat 8. Drain Valve 9. Mounting Bracket Gasket 10. Burner Mounting Bracket (part of jacket assembly on Models 20e, 32E through 51 Series; sold separately on 71E and 120E) 11. Bottom Pan 12. Combustion Chamber Sleeve 13. Combustion Chamber 14. Inspection Block 15.

CAUTION: The recommended temperature for normal residential use is 120°F. The dial on the aquastat does not always reflect the outcoming water temperature, which could occasionally exceed 120°F. The variation in outcoming temperature could be based on factors including but not limited to usage patterns and type of installation. Test your water at the tap nearest to the water heater. (See page 5 for measuring the outcoming water temperature). WARNING: Hotter water increases the risk of scald inju

For Carlin EZ-Temp aquastats, refer to the pre-packaged installation guide for proper set-up procedure. Refer to drawings for correct models. Connect the power supply to the aquastat and run through a fused disconnect switch (attached to heater in field). See Figure 1. Gravity System: The oil burner is normally equipped with a single-stage pump equipped for one line (gravity) flow. Use 1/2" O.D. soft copper tubing and attach with flared fittings. DO NOT USE COMPRESSION FITTINGS. Install the shut