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

4.9

Water quality

Water quality can have an impact on appliance longevity. Water
supplied to the Greentherm T9800 SE / SEC must be in
accordance with table 16 and fig. 26.
For water analysis data call your local water department, or if
on a well, have well water analyzed periodically. Heavy scale
will form if the combination of water total hardness and pH
exceeds the values specified in fig. 26 (grey area), 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
Fig. 26 Water total hardness and pH values
Greentherm T9800 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
1. Total Harness and pH maximum values must be evaluated
in combination. Indicated maximum values will be reduced
according to fig. 26.
2. Combined values of total hardness and pH must be under
the indicated grey area. (e.g. the pair [180;8.3] [total
hardness; pH] is not acceptable).
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. 27 [1].
▶ Tighten the PRV with the support of a wrench, see Fig. 27.
▶ Support all piping.
Fig. 27 Plumbing Connections (with shutoff valves) and
Pressure Relief Valve
Installation instructions | 33
6 720 816 815 (2018/08)