Assessments - 3, GPA: 5
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27 Maintenance Routine for ERV Maintenance Routine for ERV (for HRV, see previous page) 1. Inspect Exterior Hoods at least once a month 5. Clean Duct Work if Required Make sure exhaust and fresh air supply hoods are not blocked up or restricted by leaves, grass, or dirt. WARNING: Blockage of hoods may cause an imbalance. 2. Clean Air Filters Four Times a Year The standard filters equipped with your ERV are removable and washable. a) simply open access door and slide core out b) remove filter clips. c) once clips are removed filters can be taken off the core to be rinsed with water or a combination of soap and water. d) to assemble, place clean dry filters back into their positions. e) install core to its original position 3. Clean Core Twice a Year a) open access door b) carefully grip ends of core and pull evenly outward Core may be snug, but will slide out of the channel c) once removed from the cabinet remove filters d) vacuum core to remove dust from core surface. DO NOT WASH!! e) install the clean, dry filters f) install clean core NOTE: Core installation label on the outer end of the core. To install the clean core: a) first mount the bottom flange of the core guide into the bottom H channel approximately 1/4" (6 mm) b) mount the left or right side flange of the core guide approximately 1/4" (6 mm) followed by the other side c) mount the top flange of the core guide into the top H channel approximately 1/4" (6 mm) d) with all four corners in place and the core straight and even, push hard in the center of the core until the core stops on the back of the cabinet. NOTE: Core will appear to stick out from cabinet approximately 1/8" (3 mm). This is designed this way so that the access door will fit tight against the core. 4. Motors - MAINTENANCE FREE The duct work running to and from the ERV may accumulate dirt. Wipe and vacuum the duct once every year. You may wish to contact a Heating/Ventilation company to do this. 6. General Maintenance - Twice a Year Wipe down the inside of the cabinet with a damp cloth to remove dirt, bugs and debris that may be present. 7. Cleaning the Fans Fans may accumulate dirt causing an imbalance and/or excessive vibration of the ERV. A reduction in the air flow may also occur. In new construction this may result within the first year due to heavy dust and may occur periodically after that over time depending on the outdoor conditions. • unplug the ERV and open the service door • remove the core • remove ducting (metal and/or flexible insulated type) from the red and/or blue ports which are connected immediately inline with the fan assembly • use a small brush, such as an old toothbrush or pipe cleaner, and insert first (a) through the large opening of the fan assembly and then (b) through the smaller opening in the end of the fan assembly. • scrub individual fan blades until clean. Avoid moving or damaging balancing flat weight, clip is usually found on one or more of the fan blades • vacuum and wipe • reassemble making sure ducting is reattached firmly and insulation and moisture barrier are sealed and taped Before attempting this task, thought should be given to having a qualified service technician complete the service work. 28 TROUBLESHOOTING YOUR HRV/ERV S YSTEM CAUSE SOLUTION Poor Air Flows • 1/4” (6 mm) mesh on the outside hoods is plugged • clean exterior hoods or vents • filters plugged • remove and clean filter • core obstructed • remove and clean core • house grilles closed or blocked • check and open grilles • dampers are closed if installed • open and adjust dampers • poor power supply at site • have electrician check supply voltage at house • ductwork is restricting HRV/ERV • check duct installation • improper speed control setting • increase the speed of the HRV/ERV • HRV/ERV airflow improperly balanced • have contractor balance HRV/ERV Supply air feels cold • poor location of supply grilles, the airflow may irritate • locate the grilles high on the walls or under the baseboards, the occupant install ceiling mounted diffuser or grilles so as not to directly spill the supply air on the occupant (eg. over a sofa) • outdoor temperature extremely cold • turn down the HRV/ERV supply speed. A small duct heater (1kw) could be used to temper the supply air • placement of furniture or closed doors is restricting the movement of air in the home • if supply air is ducted into furnace return, the furnace fan may need to run continuously to distribute ventilation air comfortably Dehumidistat is not Operating • improper low voltage connection • check that the correct terminals have been used • external low voltage is shortened out by a staple or nail • check external wiring for a short • check dehumidistat setting it may be on OFF • set the dehumidistat at the desired setting Humidity Levels are too High • dehumidistat is set too high • set dehumidistat lower Condensation is appearing on the windows • HRV/ERV is undersized to handle a hot tub, indoor pool, etc. • cover pool...
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