By J. Fletcher
This quantity offers an in depth checklist of troubleshooting strategies for HVAC platforms and plant, compiled from a couple of diversified assets, and is geared toward upkeep body of workers trying to clear up issues of particular goods of plant. every one merchandise of plant has a chain of "symptoms" which describe various difficulties. "Possible motives" are given for every symptom including applicable "actions" to keep on with. Covers heating structures, cooling structures, air dealing with platforms, terminal devices and plant universal to various platforms.
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Extra resources for HVAC Troubleshooting Manual
In a forced-air heating system, this may mean only that the air filter is dirty and needs to be cleaned or replaced. If replacing the air filter does not reduce the flue temperature down to near where it was before, call your service company. O WNER M AINTENANCE H EATING S YSTEMS OF F ORCED -A IR Cleaning or Changing the Air Filter IMPORTANT! Turn off the power to the furnace before opening the furnace access panel to check the filter or fan. Few homeowners give the air filter in a furnace the attention it needs.
D EALING WITH C ONDENSATION IN THE C HIMNEY Since the low temperature of the chimney itself is the major cause of condensation inside it, the problem can be overcome by installing an insulated metal liner such as a Type L, double-walled, stainless steel liner, or a single- 50 walled stainless steel liner surrounded by insulation, as per ULC requirements. Check with your provincial/territorial fuel safety division to find out which method it approves. Remember, the use of a sealed, double-walled stainless steel flue pipe from the furnace to the chimney is a good way to keep flue gases at a high enough temperature to help prevent condensation in the chimney.
Turn the thermostat up to the maximum heat and let the furnace run for at least 15 minutes before taking a reading on the thermometer. Don’t forget to turn your thermostat back down after you have finished. Check the temperature before and after the furnace is serviced to see if it has changed. Note any steady increase through the heating season; a rise of 25°C (77°F) represents a drop of about 3 percent in furnace efficiency and a corresponding increase in fuel consumption. In a forced-air heating system, this may mean only that the air filter is dirty and needs to be cleaned or replaced.
HVAC Troubleshooting Manual by J. Fletcher