Carrier HRVCCLHU Installation, Start-up, And Operating Instructions Manual

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Carrier HRVCCLHU Installation, Start-up, And Operating Instructions Manual Manual pdf 10 page image

BALANCINGDAMPERSTALE AIRTO OUTSIDe-fFRESH AIR SUPPLY _TO BUILDING _/'TEMPORARY_lll i LOW COLLARBALANCING/ " DAMPERFROM OUTSinE_ I _ STALE AIR RETURNIIII [ \ FROMBU'L°NGFig. 15--Balancing HRVCCLHUFRESHAIRFROMOUTSIDE°°F'°W30"(760turn)FRONT-_STALE AIRTO OUTSIDETEMPORARYFRESH AIRFROM OUTSIDEDAMPERTEMPORARYFLOW COLLAR-FRONT_2"(30Omrn)STALE AIRTO OUTSIDE--12"(300turn)_B_A_N CIN GDAMPERTEMPORARY-- FLOW COLLARA99266RIGHT SIDE VIEW RIGHT SIDE VIEWFig, 16_Balancing HRVCCSVU and HRVCCLVUA98425BALANCING HRVBalancing intake and exhaust airflow is very important for propersystem operation and optimum performance when applying anHRV. Unit balancing prevents a positive and/or negative pressurewithin the home. Balancing the HRV is done by applyingtemporary flow collars and permanent balancing dampers to thefresh air intake and stale air exhaust ducts. (See Fig. 15 and 16.)Airflow is determined by connecting a magnehelic gage to thetemporary flow collar. (See Fig. 17.) Both flow collars andmagnehelic gage are included in the accessory start-up balancingkit.If supply-air from outside is greater than exhaust-air from thehouse, an imbalance can result over pressurizing the home. Ifexhanst-air is greater than supply-air, combustion appliances maybackdraft, bringing exhaust fumes into the house. A balancedcondition will ensure optimum performance, provide satisfiedcustomers, and avoid expensive callbacks.Before proceeding with balancing, all windows, doors, and fire-place flues should be tightly closed. No exhaust systems such as10range top exhausts, dryer exhaust, fume hoods, bath or roof fansshould be in operation. The forced-air furnace (if used forcirculation) should be operating in continuous fan mode for normaloperating speed.Step 1--Balancing DampersBalancing dampers (some times called butterfly dampers) areprovided with the HRVCCLHU. The dampers for theHRVCCSVU and HRVCCLVU are field supplied and should bepermanently located in fresh-air intake and stale-air exhaust ductsbetween HRV and exterior wall. (See Fig. 15 and 16) Some fieldmodification may be required to ensure proper installation ofbalancing dampers while located in flexible duct. Insulating overthese dampers is strongly recommended after balancing is com-plete to prevent condensation problems.Step 2_low CollarFlow Collars are temporary, and should be installed as close toHRV as possible and in straightest sections of duct to ensureaccuracy. (See Fig. 15.1 If only I flow collar is available, install