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SECTION II: GENERAL INFORMATION (cont.)
BACKFLOW PREVENTER (CLOSED SYSTEM)
Some local municipal codes and ordinances require the use of these devices on potable
(domestic) water lines. Where backflow preventers, check valves, or pressure regulating valves
are required, it will be necessary to install a
thermal expansion tank
(designed for use with
potable water) in order to prevent pressure build up in the water heater and associated piping,
which could cause the T&P valve to discharge. Follow the expansion tank manufacturer’s
recommendations when selecting a tank for your hot water system. The expansion tank
pressure shall equal the water heater system pressure prior to initial warm up.
Note: Working pressure of the water heater is 150 PSI. Do not exceed 150 PSI.
CONDENSATION
In some installations condensation will occur in the venting (exhaust) system. It is important
to not allow condensate to collect around mechanical components and bare metal parts on
the water heater. Therefore, if condensation occurs in the venting system it must be routed to
a proper area for drainage. Horizontal sections of the vent system shall slope downward away
from the water heater a minimum of 1/8" per foot. When downward sloping of the vent
system is not possible or a vertical vent arrangement is used, the condensate drain kit must be
installed. See Section IV: Installation / Vent and Combustion Air Intake / Condensate Drain
Kit for installation details.
HIGH ALTITUDE
Contact Bock Water Heaters for installations at altitudes greater than 2,000 feet above sea level.
SECTION III: PRE-INSTALLATION
LOCATION
CAUTION
This water heater must be located in an area where leakage of the tank, water line
connections, or the temperature and pressure relief valve will not result in damage to
the area adjacent to the water heater or to lower floors of the structure. When such
location cannot be avoided, a suitable drain pan must be installed under the water
heater. The drain pan depth must be suitable for draining and collecting water. The
drain pan can be purchased from your plumbing professional. The drain pan must be
piped to an adequate drain and all drain piping must be at least 0.75” in diameter
and pitched for proper drainage.
CAUTION
DO NOT store or use gasoline or other flammable, combustible, or corrosive vapors
and/or liquids in the vicinity of the water heater or any other appliance.
IF YOU SMELL GAS:
• DO NOT try to light any appliance.
• DO NOT touch any electric switch; do not use any telephone in your building.
• Immediately call your gas supplier from a telephone in another building. Follow your
gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
DO NOT OPERATE THE APPLIANCE UNTIL THE LEAKAGE IS CORRECTED!
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