as a feeler gage, position paper between the wheel surface and diameter seals. Adjust seals towards wheel surface until a slight friction on the feeler gage (paper) is detected when gage is moved along the length of the spoke. Retighten adjusting screws and recheck clearance with “feeler” gage.
Wheel Drive Components — The wheel drive motor bearings are
The wheel drive pulley is secured to the drive motor shaft by a setscrew. The setscrew is secured with removable adhe- sive to prevent loosening. Annually confirm setscrew is secure.
The wheel drive belt is a urethane stretch belt designed to provide constant tension through the life of the belt. No adjust- ment is required. Inspect the drive belt annually for proper tracking and tension. A properly tensioned belt will turn the wheel immediately after power is applied with no visible slippage during
Rotation
To
Adjust
Adjusting Screws
Feeler Gage
Fig. 39 — Diameter Seal Adjustment
Air Filters — With this ERV unit and with most other forced air heating, cooling and ventilation systems, regular air filter maintenance is of utmost importance. Proper filter main- tenance will improve indoor air quality, keep the building air- handling system clean for peak efficiency, and prolong the life of the HVAC (Heating, Ventilation, and Air Conditioning) equipment. The life of the air filters is directly related to the ap- plication to which the ERV unit is installed. The air filters should be inspected every couple of weeks until a maintenance schedule is established. The ERV unit is equipped from the fac- tory with throwaway filters, however if the installer changed the filter type, consult the installer for filter maintenance instructions.
Replacing the Throwaway Filters — After remov- ing the service door (see Removing the Service Door section) remove the spacer plugs and pull the filters or filter racks out of the cabinet. Replace the filters with the original equipment manufacturer replacements or equivalents. Refer to Tables 1A and 1B for filter sizes.
37
