To check the draft:
Close all doors and windows to the outside.
Turn on all appliances that force air out of the building. These include all exhaust/ventilation fans, furnaces, clothes dryers, wood burning stoves, etc.
Open all doors between the AquaStar and these other appliances.
Run the unit for at least 10 minutes. Then hold an ordinary mirror at the side above the front shell. Any flue gases backdrafting will cause the mirror to fog. This is a serious health hazard and must be corrected. Poor venting can result in soot building up inside the heater, overheating of the heater and freezing of the heat exchanger in a freezing environment. The mirror will remain clear with a properly functioning draft.
WARNING
Note: The burners of an instantaneous “on demand” water heater such as the AquaStar are only on at the time that hot water is actually being used, the vent pipe is therefore cold except for the short durations when hot water is being used, it is therefore very important that the venting and air supply be adequate to provide a good positive draft as soon as the burners turn on. See venting guide on back page.
The AquaStar 125B”S” instantaneous water heaters have
In Canada,
In U.S.A., ANSI Z223.1 - NFPA 54, National Fuel Gas Code for detailed requirements.
The vent connection for the Aquastar 125BS is 5 inches. However, for installations at high altitude (over 2000 feet above sea level) a six inch vent is required. A 5” by 6” vent adaptor must be affixed to the flue collar of the Aquastar with at least two screws. See Fig. 3.
5” X 6” ADAPTOR
USED ON HIGH ALTITUDE
Fig. 3 – Vent Adaptor for High Altitude Installations
WARNING: Failure TO INCREASE THE VENT SIZE TO SIX INCHES AND/or assure that the manifold pressure is set to proper value listed for applications at high altitudes will cause unsafe venting, asphyxiation, and will void CSA Certification.
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