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WARNING

Improper installation, adjustment, alteration,
service or maintenance can cause serious in-
jury or property damage. Refer to this manual.
For assistance or additional information, con-
sult a qualified installer or service agency.

WARNING

If the information in these instructions is not
followed exactly, a fire or explosion may result
causing property damage, personal injury or
death.

WARNING

Do not install on combustible flooring. Install
in accordance with all local codes. In the
absence of local codes, refer to NFPA 31 or
ANSI Z21.10.1.

CAUTION

The recommended temperature for normal 
residential use is 120°F. The dial on the aquastat
does not always reflect the out-coming water
temperature and it could occasionally exceed
120°F. Variation in out-coming temperature
could be based on factors including but not
limited to usage patterns and type of installa-
tion. Test water at the tap nearest to the water
heater. (See page 8 for measuring the out-
coming water temperature.)

WARNING

Hotter water increases the risk of scald injury.
Before adjusting the water temperature setting,
read this instruction manual. Temperatures at
which injury occurs vary with the person’s age
and the length of exposure. The slower reac-
tion time of children, elderly or physically or
mentally challenged persons increases the
scalding hazard to them. It is recommended
that lower water temperatures be used where
these exposure hazards exist. Households with
small children or invalids may require a tem-
perature setting less than 120°F to prevent acci-
dental contact with hot water. 

To produce

less than 120°F, use point-of-use tempera-
ture limiting devices.

If higher water temperature is needed in part
of the water system, automatic temperature
limiting devices must be used on all lines to
water taps.

WARNING

Flammable vapors may be drawn to this water
heater from other areas of the structure by air
currents. Do not store or use any flammable
liquids in the vicinity of this heater.

WARNING

Water heater blankets may restrict air flow to
the water heater and cause fire, asphyxiation,
personal injury or death.

THIS MANUAL HAS BEEN PREPARED 

TO ACQUAINT YOU WITH THE INSTALLATION,

OPERATION, AND MAINTENANCE OF YOUR

WATER HEATER AND TO PROVIDE 

IMPORTANT SAFETY INFORMATION.

Read all instructions thoroughly before at-
tempting installation or operation of your
water heater. Keep these instructions for future
reference.

Local plumbing and electrical codes must be
followed in the installation of this water
heater. In the absence of a local code use the
UNIFORM PLUMBING CODE and the NFPA
Code. Local codes may supersede instructions
in this installation manual.

These instructions are a guide for the correct
installation of the water heater. The manufac-
turer will not be liable for damages caused by
failure to comply with the installation and 
operating instructions outlined on the 
following pages.

If you lack the necessary skills required or have
difficulty following the directions, seek help
from a qualified person for that part of the
installation you do not understand.

FAILURE TO FOLLOW THESE INSTRUCTIONS

OR ALL APPLICABLE BUILDING CODES 

AND REGULATIONS VOIDS THE WARRANTY

ON THIS WATER HEATER.

Warranty, Registration Card and Parts List are included.

Homeowner: Please remember to return the Registration Card!

To the Consumer:

Please read these and all component 
instructions and keep for future reference.

To the Installer:

Please attach these instructions 
next to the water heater.

OIL-FIRED BCS

Instruction Manual

Summary of Contents for Oil-Fired

Page 1: ...ter temperature is needed in part of the water system automatic temperature limiting devices must be used on all lines to water taps WARNING Flammable vapors may be drawn to this water heater from oth...

Page 2: ...40 126 9 3 4 3 4 1 90 136 61 20 6 54 18 120 60 305 51E BCS 50 152 1 1 1 1 1 90 161 59 24 6 11 18 120 60 345 120E BCS 113 155 1 1 1 2 2 90 163 67 311 2 6 19 22 120 60 705 190E BCS 113 190 1 35 1 2 2 90...

Page 3: ...ally out of the west or north is the preferred wall for installa tion This reduces the likelihood that the Balanced Flue application will be operating against high winds and severe cold when it is cyc...

Page 4: ...EMENT NOTE Locate the heater so it is not subject to physical damage from moving vehicles or flooding DO NOT INSTALL THE WATER HEATER ON COM BUSTIBLE FLOORING Place on noncombustible flooring and main...

Page 5: ...d up in the water heater and result in tank failure If this water heater is installed in a closed system or if backflow preventers and pressure regulators are installed a properly sized expansion tank...

Page 6: ...astat with immersion well is packed with the burner The thermostat is factory set at 120 F for residential use The maximum setting for 20 32 40 and 51E BCS models is 160 F for 120 and 190E BCS models...

Page 7: ...eturn line should stop slightly above the suction line Use a minimum of fittings Make tubing bends with as large a radius as possible DO NOT USE COMPRESSION FITTINGS Use caution in the final connectio...

Page 8: ...to see that the burner control locks out in the time specified on the control Reattach the wire and reset the control The burner should restart Note You may have to wait a minute before resetting the...

Page 9: ...lter and have the oil tank checked for sediment Clean the tank if necessary 4 The system should be checked with combustion instruments for safe and efficient operation 5 Keep the oil tank full to prev...

Page 10: ...tes runs for a short time 10 20 seconds and then goes out on safety replace the flame detector If the burner still runs only a short time replace the control 6 If you smell oil or combustion products...

Page 11: ...120E BCS Carlin 1 1 x 70A 190E BCS Carlin 1 35 x 70B The only controls acceptable for use with these models are as follows For normal household applications Burner Carlin EZ1 with 15 minute post purge...

Page 12: ...ntal or consequential damages so the above limitations or exclusions may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to stat...

Page 13: ...Oil Fired BCS Page 13 BOCK OIL FIRED WATER HEATER...

Page 14: ...Page 14 Oil Fired BCS Balanced Flue BURNER WIRE DIAGRAM Models 20 32 40 51 120 190E BCS Carlin EZ Temp Control...

Page 15: ...Oil Fired BCS Page 15 EXPANSION TANK OPTIONAL IF ANY OF THESE DEVICES ARE USED A PROPERLY SIZED EXPANSION TANK MUST BE INSTALLED...

Page 16: ...h space and water Bock Radiant uses functional hot water and avoids boiler type overheating that wastes energy Bock Radiant eliminates using a boiler during warm months and lets ecomonic domestic hot...

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