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Installation instructions
19
Greentherm T9800 SE 160/199 – 6 720 816 815 (2022/01)
NOTICE:
▶ Installations resulting in negative pressure/back draft
require sealed combustion (twin pipe / concentric).
Damage caused from back draft, ie. freezing, is not covered
by warranty.
NOTICE:
Appliance malfunction!
▶ Protect the inlet air supply from leaves and debris by
installing a screen on the intake of the termination. A
minimum screen mesh size of ¼” is recommended.
▶ Do not install the water heater in areas where dust and
chemicals like hair sprays, spray detergents, chlorine, may
accumulate.
Do not cover non-metallic vent pipe and fittings with thermal
insulation, unless going through an insulated wall or ceiling.
Flue temperature:
▶ To prevent the risk of flue material overheat the appliance's
flue temperature is sensed and is limited. The flue
temperature limit is dependent on inlet water temperature.
▶ Residential models: Maximum flue temperature is limited
to 145°F (63°C).
4.6.1 Vent options
This appliance can be installed as direct vent or Category IV.
The Greentherm T9800 SE is approved with the following
venting options:
Table 5 Approved vent materials
For specific questions concerning vent material,
specifications, usage or installation, please contact the
vent manufacturer directly.
Approved Vent Manufacturers;
•M&G
•Centrotherm
•IPEX
• Royal Plastics
•Eccovent
•Charlotte
•Z-Flex
Do not use cellular foam core pipe for exhaust. Approved for
intake only.
The vent connection for the appliance is secured with a clamp
on the appliance exhaust adapter. All other vent connections
must be glued, except PP and flex PP. Slide the vent pipe into
the exhaust adapter. The exhaust pipe must be properly
supported and must be pitched a minimum of a ¼ inch per foot
back to the appliance. This allows the condensate to drain
properly.
Maximum vent lengths and equivalent lengths per table 8
apply.
Item Material United States Canada
Vent or air intake pipe
and fitting
PP
flexible M&G /
DuraventCentrotherm
(UL-1738)
Thermoplastic vent pipe
must be certified to ULC
S636.
Air Intake pipe may be of any
material listed (left)
concentric
rigid
PVC schedule 40 ANSI/ASTM D1785
PVC-DWV ANSI/ASTM D2665
CPVC schedule 40 ANSI/ASTM F441
ABS-DWV schedule 40 ANSI/ASTM D2661
Pipe cement / primer PVC ANSI/ASTM D2564
CPVC ANSI/ASTM F493
ABS ANSI/ASTM D2235
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