•A small amount of air will be in the gas supply lines. When fi rst lighting appliance it will take a short time for air to purge from lines. When purging is complete the appliance will light and operate normally.
WARNING
Fire Risk
Explosion Risk
•Gas build-up during line purge may ignite.
•Purge should be performed by qualifi ed technician.
•Ensure adequate ventilation.
•Ensure there are no ignition sources such as sparks or open fl ames.
D. High Altitude Installations
U.L. listed gas appliances are tested and approved without requiring changes for elevations from 0 to 2000 ft in the USA and Canada.
When installing this appliance at an elevation above 2000 ft, it may be necessary to decrease the input rating by chang- ing the existing burner orifi ce to a smaller size. Input rate should be reduced by 4% for each 1000 ft above a 2000 ft elevation in the U.S.A., or 10% for elevations between 2000 and 4500 ft in Canada. If the heating value of the gas has been reduced, these rules do not apply. To identify the prop- er orifi ce size, check with the local gas utility.
If installing this appliance at an elevation above 4500 ft (in Canada), check with local authorities.
WARNING
CHECK FOR GAS LEAKS
Fire Risk
Explosion Risk
Asphyxiation Risk
•Check all fi ttings and connections.
•Do not use open fl ame.
•After the gas line installation is complete, all connections must be tightened and checked for leaks with a commercially available,
Fittings and connections may have loosened during shipping and handling.
WARNING
Fire Risk
Explosion Risk
Do NOT change the valve settings.
•This valve has been preset at the factory.
•Changing valve settings may result in fire hazard or bodily injury.
20 | Heatilator • GB4336/GB4992 • |