Flue Spillage Test; Altitude Adjustment - Osburn Cordova Series Installation And Operating Instructions Manual

3.3.9.3 Flue Spillage Test

A flue spillage test is recommended as part of this installation and should be performed by a qualified
service person only. Hereafter, periodically check the vent draft.
1. Close all the doors and windows in the room.
2. Start all the exhaust fans in the home.
3. Remove the top grille assembly by pulling it forward carefully.
4. Light the heater to the full fire position.
5. After five to ten minutes, insert a match inside a draft duct opening and ensure that the flame wisps
and smoke are drawn into the duct at the front corner (see Figures 25a & b).
If the flame wisps are not drawn into the ducts, turn the heater off, and determine the cause of the
6.
lack of draft.
D
O NOT OPERATE THE HEATER UNTIL THERE IS SUFFICIENT DRAFT
7. Replace the top grille assembly after the insert cools.
f i r e - p a r t s . c o m
Figure 25a

3.3.9.4 Altitude Adjustment

All valves have been pre-set and certified for installation at elevations from 0 - 4500 feet (1-1372m) above
sea level.
When installing this heater at higher elevations in Canada, it is necessary to decrease the input rating, by
replacing the existing burner orifice with a smaller size for installations over 4500 feet. The appliance's
input should be reduced 4% for each additional 1000 feet above sea level. For the USA, de-rate the heater
from sea level according to the gas installation code.
.
Figure 25b
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