Bosch GWH 345 ESR-N Manual page 3

Warning: The recirculating water
heater must be disconnected from the
gas supply piping system during any
pressure testing of that system at test
pressures equal to or more than 0.5
psig (14" W.C.).
Warning: The
heater should be located in an area
where leakage
connections will not result in damage to
the area adjacent to the appliance or to
lower floors of the structure. When such
locations cannot be avoided, it is
recommended that a suitable drain pan,
adequately drained, be installed under
the appliance. The pan must not restrict
combustion air flow.
Warning: The maximum inlet gas
pressure must not exceed the value
specified by the manufacturer and that
the minimum value listed is for the
purposes of input adjustment.
Warning: If a water heater is installed in
a closed water supply system, such as
one having a backflow preventer in the
cold water supply line, means shall be
provided to control thermal expansion.
Contact the water supplier or local
plumbing inspector on how to control
this situation.
Warning: Keeping appliance area clear
and free from combustible materials,
gasoline and other flammable vapors
and liquids.
Warning: Not obstructing the flow of
combustion and ventilation air.
Warning: When manually operating the
relief valve, precautions must be taken
prior to operating the relief valve to avoid
contact with hot water coming out of the
relief valve and to prevent water
damage.
6 720 607 909
recirculating water
of the tank or
Caution: Label all wires prior to
disconnection when servicing controls.
Wiring errors can use improper and
dangerous operation.
Verify proper operation after servicing.
Warning: If a relief valve discharges
periodically, this may be due to thermal
expansion in a closed water supply
system. Contact the water supplier or
local plumbing inspector on how to
correct this situation. Do not plug the
relief valve.
FCC:
This device complies with Part 15 of the FCC rules.
Operation is subject to the following two conditions: (1)
This device may not cause harmful interference, and (2)
this device must accept any interference received,
including interference that may cause undesired opera-
tion.
Caution: Any
modifications not expressly approved
by the party responsible for compliance
could void the user's authority to
operate the equipment.
Fig. 1
Warning
changes or
3