Bock Water heaters EZ 100-199, Installation And Operation Instruction Manual

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Atmospheric Gas Page 7
CONNECT WATER PIPING
This water heater incorporates fittings that contain a nonmetallic lining. Do not apply heat to
these fittings when making sweat connections to the heater. Sweat tubing to an adapter before
securing adapter to any fittings on the water heater.
The Bock ezFIT series includes hot outlet and cold inlet water connections on the top and side of
the water heater. Choose a cold inlet and hot outlet combination that best suits the installation.
Install dielectric unions and shut off valves on both hot and cold water lines. Recirculation/re-
turn lines can be plumbed to a cold water inlet, if necessary.
These models are equipped with an inlet flow diverter (side cold inlet) installed in the tank.
Heaters equipped with this diverter are labeled with a decal next to the inlet (shown to the
left). The purpose of this diverter is to help keep the tank bottom free of sediment by aiding
tank flushing. The index line on the diverter nipple must be aligned with the arrow on the
decal (left) to function properly. Do not allow the divert-
er to rotate out of position when tightening the inlet fit-
tings.
An approved pressure and temperature relief valve is fac-
tory installed in the opening provided in the upper right-
hand side of the water heater. For safe operation of the
water heater, the relief valve must not be removed from
this location or plugged. When replacing the relief valve,
the new valve must have a rated discharge capacity equal
to or greater than the rated input of the water heater. It must also have a maximum tempera-
ture rating of 210°F and maximum pressure must not exceed 150 psi. Pipe the T&P valve outlet
to within 6" of the floor or to a floor drain with a free flowing drain pipe. No shut off valve
should be installed in the line between the relief valve and the drain. The area around the water
heater and the T&P piping should be protected against possible water damage caused by the
functioning of the T&P valve.
CAUTION
Scalding injury and/or water damage can occur from either the manual lifting of the lever or
the normal operation of the T&P valve if it is not piped to a proper drain. If the valve fails to
flow water or reseat, call your plumber.
Check incoming water line for backflow preventers or water pressure reducing valves, as these
may cause pressure to build up in the water heater and result in tank failure. If this water
heater is installed in a closed system or if backflow preventers and pressure regulators are
installed, a properly sized expansion tank must be installed.
Note: Do not try to heat hard water as this will drastically reduce heater life. Install a water
softener or other scale reducing water treatment system if the water heater is being installed in
a hard water area (water hardness higher than seven grains).
If this heater is used for water (potable) heating and space heating, the following requirements apply:
- Piping and components connected to the water heater for the space heating application must
be suitable for use with potable water.
- Toxic chemicals, such as used for boiler treatment, shall not be introduced into the potable
water used for space heating.
- A water heater which will be used to supply potable water shall not be connected to any
heating system or component(s) previously used with a non-potable water heating appliance.
- If the space heating requires water at a temperature higher than required for other uses, a
tempering valve shall be installed to reduce the water temperature for those uses in order to
lessen scald hazard potential.
- This water heater cannot be used for space heating applications only.
- Space heating piping connections shall be made to the free Hot/Cold connections on the
water heater. Two sets of Hot/Cold connections are supplied.