Determine cooling capacity

Determine cooling capacity by using the following formula: Btuh = (h2 - h1) x 4.5 x CFM  h1 =  heat content of air from Table A-1 corresponding to supply air  wet bulb temperature.* h2 =  heat content of air from Table A-1 corresponding to return air wet bulb temperature.* 4.5 =  air properties constant CFM =  Cubic feet per minute air calculated, from funnel, temperature rise, or return air method  *    At supply air outlet and inlet indoors record wet bulb and dry bulb temperatures.  (From Table A-1, record heat content values that correspond to supply and return air wet bulb temperatures, h1 and h2, respectively)
f) Verify that system capacity is + 10% of the equipment manufacturer's rating at the test conditions.
l. Direct Exchange Ground Source Heat Pump (DXGS) Inspection Procedures Inspect DXGS and duct system(s) for adherence to Standards. The preceding inspection procedures shall apply to DXGS:
1) Verify the distances between the compressor and the ground coil and compressor to air handling blower unit as required by DXGS manufacturer.  Both vertical height and total line distance shall be within limits as specified by manufacturer.  Insure all linesets, both vapor and liquid, are insulated with rubatex, or similar insulation non-corrosive to copper. (Major)