Operating instructions

1104UESAGBEN, page 10/31
The units may be installed as a balanced fl ue type C heater requiring both a com-
bustion air inlet pipe and a fl ue pipe or as a power vented heater type B where the
combustion air is taken from the space where heater is installed and which requires
only a fl ue pipe exhausting to outdoors.
All products of combustion must be fl ued to outdoor atmosphere.
Each heater installed as a type B appliance must be fi tted with an individual fl ue pipe
and the combustion air inlet opening must be provided with a protection grill. Each
heater installed as a type C appliance must be fi tted with an individual combustion
air/fl ue pipe system. Type C2 appliance, with single pipe system for supply of
combustion air and evacuation of fl ue gasses, are not allowed.
IMPORTANT :
A condense drain must be fi tted to both the unit and the fl ue outlet to properly drain all
condensation (see fi gure 5).
The fl ue must be installed in accordance with national and local regulations. Failure
to provide proper fl ueing could result in death, serious injury and/or property damage.
The air heater must be installed with a fl ue to the outside of the building. Safe opera-
tion of any power vented gas apparatus requires a properly operating fl ue system,
correct provision for combustion air and regular maintenance and inspection.
The combustion products are loaded with moisture, some of which will condense out
within the fl ue. No condensate leakage is permitted. Horizontal fl ue runs must rise
by 1° (17mm per meter) from the appliance to ensure that the condense returns
to the fl ue drain.
Gasket sealed single wall seamless heavy gauge aluminium pipes are required for
use with condensing gas appliances. All joints must be sealed to prevent leakage of
fl ue gases or condensation into the building.
For testing, the fl ue pipe should include a sealable test point. Ideally the test point-
should be at least 450mm away from the air heater fl ue connection socket. However
if a concentric fl ue is attached directly to the connection sockets then the combustion
should be tested through the fl ue outlet collar via a drilled test point which must be se-
curely plugged on completion.
Follow the fl ue pipe manufacturers installation instructions for making joints, including
connections to the air heater, for passing through a building element and for support
requirements.
The installer must install a condensate drain system. A 3/4” male fi tting connection is
furnished with the heater for the vent drain. All other material must be fi eld supplied.
Table 5
Diameter & maximum fl ue
pipe lengths
UESA 035, 055 083, 102
Heater socket & pipe dia mm fl ue pipe 100 130
inlet pipe 100 130
Max. straight length (with wall/
roof terminal)
m fl ue pipe 9 9
inlet pipe 9 9
Equivalent length of 45° elbow m fl ue pipe 0.75 0.75
inlet pipe 0.75 0.75
Equivalent length of 90°
elbow
m fl ue pipe 1.5 1.5
inlet pipe 1.5 1.5
•Use only one dia of fl ue pipe on an installation
•Recommended minimum fl ue length is 1m