Maintenance - Bock Water heaters 30ST Instruction Manual

DRAWING #4
MANIFOLDING
MUST BE
COLD WATER
EQUAL LENGTH
SUPPLY
MANIFOLDING
MUST BE
EQUAL LENGTH
BOCK
HEATER
HEATERS MUST BE IDENTICAL
storage tank. Cool water return from the storage tank should be returned to the second water
heater in the series.
DRAWING #5
GEO-STOR
TANK

MAINTENANCE

All Bock storage tanks are equipped with magnesium anode rods. These rods must be checked
annually and replaced when they become worn to
tank life. The replacement interval will depend on water conditions. Failure to service and
replace the anodes will shorten tank life and void the tank warranty.
Flush the storage tank periodically to remove sediment. ASME tanks are typically equipped
with hand holes to aid in sediment removal.
Storage Tanks
CHECK
BOCK
VALVE
CIRCULATING
HEATER
PUMP
RECIRCULATION
RETURN
(OPTIONAL)
Drawing #4 shows a typical
system with two water heaters
connected in parallel
supplying hot water to the
storage tank which then
supplies hot water to the
building load. Plumbing is
HOT WATER
identical to the typical system
OUT
shown in drawing #1 with the
exception of the parallel water
heaters. The storage tank can
also be connected to two water
heaters in series. This
STORAGE
TANK
installation would look similar
to the parallel system. The
difference is that all cold water
will be fed to the first water
heater in the series, heated
water from this heater will be
fed to the cold water inlet of
the second heater. Heated
TANK
THERMOSTAT
water from the second heater
would then be fed to the
Drawing #5 shows a Bock
storage tank piped to a water -
water geothermal heat pump
supplying heated water to a
radiant floor system (drawing
courtesy of Enertech Mfg).
3
⁄ -inch diameter or less to ensure long
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