Operating instructions

9
VENTING
The D-2 Power Vent operates with a positive vent static pressure and with a vent gas temperature that prevents
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xcessive condensate production in the vent, and as such, is a CATEGORY III appliance.
The total length of run shall not exceed an equivalent length of 100 ft including the termination cap. For all cases,
each 90° elbow reduces the maximum vent run by 10 ft and each 45° elbow reduces the run by 5 ft. The vent
m
ust be installed properly to prevent the flue gas leakage within the heater. The vent pipe must be suitable for
use with Category III Appliances which have flue gas temperatures of less than 400°F. Care must be taken dur-
ing the assembly to ensure that all joints are properly sealed.
For appliances installed in extremely cold climates, it is recommended that:
a) The vent be installed with a slight upward slope of not more than 1/4” per foot of horizontal run to the
vent terminal. In this case, an approved condensation trap must be installed per applicable codes.
b) The vent be insulated through the length of the horizontal run.
The exit terminal of the D-2 Power Vent shall not be less than 7 ft above grade where located adjacent to pub-
lic walkways. It must also be at least 3 ft above any forced air inlet located within a 10 ft radius.