Instruction manual

Storage Tanks Page 7
DRAWING #4
D
rawing #4 shows a typical
system with two water heaters
connected in parallel
supplying hot water to the
storage tank which then
s
upplies hot water to the
building load. Plumbing is
identical to the typical system
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
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
water from the second heater
would then be fed to the
storage tank. Cool water return from the storage tank should be returned to the second water
heater in the series.
DRAWING #5
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).
MAINTENANCE
All Bock storage tanks are equipped with magnesium anode rods. These rods must be checked
annually and replaced when they become worn to
3
⁄8-inch diameter or less to ensure long
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.
HEATER
B
OCK
HEATERS MUST BE IDENTICAL
HEATER
B
OCK
EQUAL LENGTH
EQUAL LENGTH
M
ANIFOLDING
MUST BE
SUPPLY
C
OLD WATER
MUST BE
MANIFOLDING
T
HERMOSTAT
TANK
STORAGE
(OPTIONAL)
P
UMP
CIRCULATING
RETURN
R
ECIRCULATION
VALVE
C
HECK
T
ANK
OUT
HOT WATER
GEO-STOR
TANK