TO THE CONSUMER:
Read these and all com-
Please keep for future
reference. Please re-
member to return the
card & parts list included.
TO THE INSTALLER:
Please attach these in-
structions next to the
BOCK RESIDENTIAL OIL-FIRED
Model numbers: 20e, 20pp, 32E, 32EC, 32PP,
32PPC, 33E, 33PP, 40E, 40PP, 50ES, 50ESC,
51E, 51EC, 51PP, 51PPC, 71E, 120E
Improper installation, adjustment, alteration, service
or maintenance can cause serious injury or prop-
erty damage. Refer to this manual. For assistance
or additional information, consult a qualified installer
or service agency.
If the information in these instructions is not fol-
lowed exactly, fire or explosion may result and can
cause property damage, personal injury or death.
Follow minimum combustible clearance as noted
on water heater label. Do not install on combustible
flooring (see Figure 2, Page 3). Install in accor-
dance with all local codes. In the absence of local
codes, refer to NFPA 31 or ANSI Z21.10.1.
The recommended temperature for normal residen-
tial use is 120°F. The dial on the aquastat does not
always reflect the outcoming water temperature,
which could occasionally exceed 120°F. The varia-
tion 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 mea-
suring the outcoming water temperature).
Hotter water increases the risk of scald injury. Be-
fore changing the temperature setting, read the
instruction manual. Temperatures at which injury oc-
curs vary with the individual’s age and length of
The slower reaction times of children, elderly and
physically or mentally impaired persons increases
the scalding hazard to them. It is recommended lower
water temperatures be used where these situations
Households with small children or invalids may re-
quire a temperature setting less than 120°F to prevent
accidental contact with hot water.
To lower water temperature use point-of-use tem-
perature limiting devices.
Flammable vapors may be drawn to this water heat-
er from other areas of the structure by air currents.
Do not store or use any flammable liquids in the
vicinity of this heater.
Water heater blankets may restrict air flow to the
heater and cause fire, asphyxiation, personal injury
Bock Water Heaters, Inc.
110 South Dickinson Street • P.O. Box 8632 • Madison, WI 53708-8632
Phone: 608/257-2225 • Fax: 608/257-5304 • www.bockwaterheaters.com
INSTALLATION, OPERATION &