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Hersteller: Lifebreath Dateigröße: 1.05 mb Dateiname: Unterrichtssprache:

DIRECT CONNECTION of both the HRV/ERV SUPPLY AIR STREAM and EXHAUST AIR STREAM to the FURNACE COLD AIR RETURN RETURN AIR *Unit is normally balanced on HIGH speed with furnace blower ON. 40" (1m) MINIMUM O O Outdoors Cool Air Return NOTES: 1. Furnace blower may be required to operate when ventilation from HRV/ERV is required. The furnace should be set to run continuously or interlocked with HRV/ERV. 2. A minimum separation of 40 inches (1 m) is required between the two direct connections. 3. The exhaust air connection should be upstream of the supply air connection to prevent exhausting any fresh air. 4. Weatherhood arrangement is for drawing purposes only. Six feet (2 m) minimum separation required. Eighteen inches (460 mm) above grade minimum. 5. Due to the differences in pressure between the HRV/ERV and the equipment it is being connected to, the HRV/ERV's airflow must be confirmed on site, using the balancing procedure found in the installation manual. 3’ min. recommended Forced Air Furnace 22 Simplified Installation Option 2 (Supply/Return Method) RETURN AIR DIRECT CONNECTION of both the HRV/ERV SUPPLY AIR STREAM and EXHAUST AIR STREAM to the FURNACE COLD AIR RETURN & SUPPLY AIR SIDE Outdoors Cool Air Return NOTES: 1. Furnace blower may be required to operate when ventilation from HRV/ERV is required. The furnace should be set to run continuously or interlocked with HRV/ERV. 2. The exhaust air connection should be upstream of the supply air connection to prevent exhausting any fresh air. 3’ min. recommended 3’ min. recommended It may be necessary to form an elbow in the supply side ducting as shown Forced Air Furnace Example diagram only - duct configuration may change depending on model Simplified Installation Option 2 (Supply/Return Method) RETURN AIR DIRECT CONNECTION of both the HRV/ERV SUPPLY AIR STREAM and EXHAUST AIR STREAM to the FURNACE COLD AIR RETURN & SUPPLY AIR SIDE Outdoors Cool Air Return NOTES: 1. Furnace blower may be required to operate when ventilation from HRV/ERV is required. The furnace should be set to run continuously or interlocked with HRV/ERV. 2. The exhaust air connection should be upstream of the supply air connection to prevent exhausting any fresh air. 3’ min. recommended 3’ min. recommended It may be necessary to form an elbow in the supply side ducting as shown Forced Air Furnace Example diagram only - duct configuration may change depending on model 3. Weatherhood arrangement is for drawing purposes only. Six feet (2 m) minimum separation required. Eighteen inches (460 mm) above grade minimum. 4. Due to the differences in pressure between the HRV/ERV and the equipment it is being connected to, the HRV/ERV's airflow must be confirmed on site, using the balancing procedure found in the installation manual. 23 Fully Dedicated System Example diagram only - duct configuration may change depending on model Example diagram only - duct configuration may change depending on model Please Note: It is the responsibility of the installer to ensure all ductwork is sized and installed as designed to ensure the system will perform as intended. All air movement devices have a performance curve. The amount of air (CFM) that an HRV/ERV will deliver is directly related to the total external static pressure (E.S.P.) of the system. Static pressure is a measure of resistance imposed on the blower by length of duct work/number of fittings used in duct work, duct heater etc. 24 PITOT TUBE AIR FLOW BALANCING It is necessary to have balanced air flows in an HRV/ERV. The volume of air brought in from the outside must equal the volume of air exhausted by the unit. If the air flows are not properly balanced, then; • The HRV/ERV may not operate at its maximum efficiency • A negative or positive air pressure may occur in the house • The unit may not defrost properly • Failure to balance HRV/ERV properly may void warranty Excessive positive pressure may drive moist indoor air into the external walls of the building where it may condense (in cold weather) and degrade structural components. May also cause key holes to freeze up. Excessive negative pressure may have several undesirable effects. In some geographic locations, soil gases such as methane and radon gas may be drawn into the home through basement/ground contact areas. Excessive negative pressure may also cause the backdrafting of vented combustion equipment. Read the Application Warning on the front of this manual! Prior to balancing, ensure that: 1. All sealing of the ductwork system has been completed. 2. All of the HRV/ERV's components are in place and functioning properly. 3. Balancing dampers are fully open. 4. Unit is on HIGH speed. 5. Air flows in branch lines to specific areas of the house should be adjusted first prior to balancing the unit. A smoke pencil used at the grilles is a good indicator of each branch line's relative air flow. 6. After taking readings of both the stale air to the HRV/ERV duct and fresh air to the house duct, t...

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