Bock Water heaters 32E - Manual (Page 7)

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SERVICE 1. Check the fuel supply, electrical wiring and fuses, and make sure temperature
control is calling for heat.
2. If the motor runs but there is no flame, remove the electrode assembly, clean,
readjust to the burner manufacturer’s specifications, check the electrode porce-
lain for cracks and replace if necessary. Check the transformer to see if it is pro-
ducing a strong spark. (Use extreme CAUTION: The transformer has a 10,000
volt output). Check that 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 (see Chart A, page 11).
3. Bleed the pump and check for clear, air-free oil. If the oil is milky or frothy, check
the line for air leaks at fittings. Tighten all fittings again. Check the filter gaskets
and make sure cartridge is clean.
4. If the burner motor does not run, check the motor thermal overload button (red
button on end of motor). Reset the primary control by pushing the reset button on
the control. If the burner motor still does not run after resetting the control, turn off
the electricity and replace the flame detector (with the same make) located in the
burner compartment. Reset the primary control. If the motor still
does not run, replace the control.
5. If the burner ignites and runs a short time (30-40 seconds), then goes out on
safety, replace the flame detector. If the burner still runs only a short time, replace
the control.
6. If there is a smell of oil or combustion products, remove and clean the electrode
assembly (see No. 2 above). Check the draft in the stack above the heater. Stack
draft (pull in) should be -.02” W.C. minimum to -.05” W.C. maximum.
Check for exhaust fans in the heater room or adjacent areas which draw com-
bustion air away from heater. THE HEATER MUST HAVE COMBUSTION AIR TO
OPERATE.
For more information, contact your installer, the nearest Bock distributor, or write,
call or fax:
BOCK WATER HEATERS, INC.
110 South Dickinson Street, Madison, WI 53703
Phone: 608/257-2225 • Fax: 608/257-5304