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Water Quality; 4.10 Water Connections - Bosch Greentherm 9800 SE 160/199 Manual

Indoor residential and comme rcial tankless water heaters
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4.9

Water quality

Water quality can have an impact on appliance longevity. Water
supplied to the Greentherm 9800 SE / SEC must be in
accordance with table 16.
For water analysis data call your local water department, or if
on a well, have well water analyzed periodically. If water quality
exceeds one or more of the values specified below, Bosch
recommends consulting a local water treatment professional
for water softening/conditioning options.
Description
pH
TDS (total Dissolved Solids) mg/l or ppm
Total hardness
Aluminum
Chlorides
Copper
Iron
Manganese
Zinc
Table 16
Connecting the pressure relief valve (PRV)
A pressure relief valve is included in the box and must be
installed at the time of installation. No valve is to be placed
between the PRV and the heater. No reducing coupling or other
restriction may be installed in the discharge line. The discharge
line must be a minimum of 4" above a drain and installed such
that it allows complete drainage of both the PRV and the line.
The discharge line must be placed where it will not cause any
damage.
▶ Use the integrated port to install the PRV, see Fig. 21 [1].
▶ Support all piping.
Fig. 21
Plumbing Connections (with shutoff valves) and
Pressure Relief Valve
Greentherm 9800 SE 160/199 | SEC 199
Max. Levels
pH
6.5 - 8.5
690
mg/l or ppm
200
mg/l or ppm
2.0
mg/l or ppm
250
mg/l or ppm
1.0
mg/l or ppm
0.3
mg/l or ppm
0.05
mg/l or ppm
5.0

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 160 °F (71 °C) for
Commercial appliances.
NOTICE:
▶ In applications where inlet water
temperature can exceed 140 °F (60 °C)
for Residential appliances or 160 °F
(71 °C) for Commercial appliances, 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 160 °F
(71 °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.
Fig. 22
[1] Cold connection
[2] Hot connection
Installation instructions | 31
6 720 816 815 (2016/10)

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