Water Connections - Bosch Greentherm T9800 SEC 199 Installation And Operating Instructions Manual

34 | Installation instructions

4.10 Water connections

Water connections are on top ONLY.
Bottom connections are drain/service ports
with limited flow capacity.
NOTICE:
▶ This heater is not approved for
preheated water applications exceeding
140 °F (60 °C) for Residential
appliances or 180 °F (82 °C) for
Commercial appliances, in these cases
use a 3-way valve or mixing valve must
be installed before the appliance to
prevent water exceeding 140 °F (60 °C)
for Residential appliances or 180 °F
(82 °C) for Commercial appliances,
from entering the appliance.
▶ When facing the heater, the ¾ " cold connection is on the
top right and the hot connection is on the top left.
▶ Tighten all water connections with the support of a wrench,
see Fig. 28.
Fig. 28
[1] Cold connection
[2] Hot connection
6 720 816 815 (2018/08)
Fig. 29 Water filter
[1] Cap
[2] Water filter
WARNING: Appliance damage!
Appliance will overheat if not filled with water
▶ Ensure that the appliance is filled with
water by opening a hot water tap, before
plug in the water heater to the power
supply.
▶ The use of unions when connecting to the inlet and outlet
connections is recommended. This will facilitate any
necessary servicing.
▶ Plastic or PEX type plumbing materials are not suitable for
connecting directly to or within 18" of the water heater.
▶ Although water piping throughout the building may not be
copper, we require that copper or suitably rated stainless
steel flex line be used for the water connections for 18" on
either side of the water heater (follow local codes if more
stringent).
▶ Never sweat any piping directly to water connections, as
damage will occur.
▶ Keep water inlet and outlet pipes to no less than ¾"
diameter to allow the full flow capacity.
▶ If the cold and hot connections to the heater are reversed,
the heater will not function.
▶ Be certain there are no loose particles or dirt in the piping.
Blow out or flush the lines before connecting to the water
heater.
▶ Full port shutoff valves should be installed on both the cold
water supply and hot water outlet lines to facilitate
servicing the heater (see fig. 27).
▶ For installation on a private well system with a pressure
tank, the lowest pressure range setting recommended is
30-45 psi (2.06 - 3.1bar).
Greentherm T9800 SE 160/199 | SEC 199