Unpacking the heater
The heater is default-set by the manufacturer to operate
with Natural Gas, for use with Liquid Propane, follow the
conversion instructions in section 10.13. Before installing
the unit, be certain you have the heater correctly set for
your type of Gas - Propane or Natural Gas. Identification
labels are found on the shipping box, and on the rating plate
which is located on the left side panel of the cover.
[A] Serial number
[B] Type of gas (Natural gas by default)
3.3.1 The box includes
LP Conversion Kit
Bracket and screws for wall hanging the heater
Installation manual (manual can be downloaded at
The Greentherm 9800 SEO/ SECO is not approved or
Manufactured (mobile) homes, boats or any mobile
installation. (Modular homes are acceptable for
Use above 10500 ft A.S.L. altitude.
Applications where inlet water temperature is higher than
140 °F (60 °C) for Residential appliances or 180 °F (82 °C)
for Commercial appliances.
In these applications a 3 way valve or thermostatic mixing
valve must be installed before the appliance's water inlet
Greentherm 9800 SEO 160/199 | SECO 199
In preheated inlet water applications (i.e.
solar preheat), activation flow rate will vary
depending upon the unit set point, inlet
water temperature and the demand flow rate
thru the unit. Please consult Bosch for
further details to determine if this will
function in your application.
3.3.2 Remove front cover
▶ Loosen two Phillips head screws located on bottom of
cover (fig. 3).
Loosen two Phillips head screws
▶ Lift the front cover to remove from the appliance.
▶ Install the appliance vertically with the plumbing
connections facing the ground.
Appliance details | 9
6 720 817 281 (2017/05)