SERVICE
1. Check the fuel supply, electrical wiring, fuses, and make sure the temperature control is
calling for heat.
2. If the motor runs but there is no flame, remove the electrode assembly, clean, readjust, and
check the porcelain for cracks. Replace if necessary. Check the ignitor to see if it is produc-
ing a spark. (
Use extreme caution—the ignitor has 14,000 volt output.
) Make sure the
coupling between the motor and pump shaft is not slipping. Check the set screw on the
blower wheel for tightness. Clean or replace the nozzle with the correct size and spray
angle.
3. Bleed the pump and check for clear, air-free oil. If oil is milky or frothy, check the line for
air leaks at fittings. Tighten all fittings again. Check filter gaskets and make sure the car-
tridge is clean.
4. If the burner motor fails to start, reset the control and check for voltage on the burner lead.
If no voltage, replace control. If there is power to the motor connect a pig tail and 100 watt
bulb to the capacitor leads. If the motor starts, replace the capacitor. If not, check for ther-
mal lock out.
Note:
The BCS burner is equipped with a split capacitor motor containing an
automatic reset thermal cut-out. If the motor cuts out because of overheating, it will reset
when the motor cools. Make certain that air can flow freely around burner. If motor locks
out repeatedly, check capacitor and the fuel pump turning torque before replacing motor.
5. If the burner ignites, 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, remove and clean the electrode assembly, readjust
combustion settings, and insure that the joints on the flue connections are sealed (see “Ex-
huast Vent” and “Fresh Air Intake Vent” installation, page 6).
7. The internal high limit located in the thermostat will break the circuit to the burner if
water overheating occurs. When this happens, the burner will not go into post purge or
may stop post purge prematurely. Replace the thermostat, if necessary.
If any other service problems arise, you may obtain more information by contacting your
installer or nearest Bock distributor; or write, call, or fax:
Bock Water Heaters, Inc. • 110 South Dickinson Street • Madison, WI 53703
Telephone 608-257-2225 • Fax 608-257-5304
LIMITED WARRANTY
This warranty covers “Bock” water heater models 20e-BCS, 32E-BCS, 40E-BCS, 51E-BCS, 120E-
BCS and 190E-BCS. Bock Water Heaters, a division of Bock Corporation—a Wisconsin corpora-
tion—at 110 S. Dickinson Street, Madison, Wisconsin 53703 (“Company”), warrants to the
owner, the tank of this water heater will not leak due to defective materials or workmanship
for FIVE (5) years from the date of original installation. If the water heater is installed in other
than a single family dwelling, this warranty is limited to THREE (3) years from the date of
original installation. The company also warrants that no other part of this water heater will
fail due to a defect in material or workmanship for one (1) year.
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Oil-Fired BCS
