Installation on vinyl
4.4.1 Air openings
Air openings are located on the back of the water heater. The
combustion air enters between the mounting surface and the
▶ Do not restrict in any way air intake openings.
▶ Keep water heater sides clear and unblocked.
Greentherm T9800 SEO 160/199 | SECO 199 – 6 720 817 281 (2018/12)
The appliances are supplied having been set in the factory for
the values shown on the rating plate for natural gas.
For any other adjustments see chapter 7.
4.5.1 Natural gas
The appliances must not be operated if the dynamic gas
pressure is less than 3.5"WC or greater than 10.5" WC.
Mounting installation for modular homes
When installing this appliance on the outside of a modular
home, the unit must be additionally secured at the bottom of
the water heater as shown in fig. 9. Use the included screws to
secure the brackets at the bottom of the water heater to the
wall. If the wall is sheathed with plaster or drywall, it is
recommended that a support board be first attached across a
pair of studs at the bottom of the unit as shown in fig. 6.
Mounting the heater on modular homes
Gas piping & connections
Before connecting the gas supply, check the rating plate on the
right side of the heater to be sure that the heater is rated for the
same gas to which it will be connected.
In the United States: The installation must conform with local
codes or, in the absence of local codes, the National Fuel Gas