7
it is important to have the proper balance between the air being supplied to each room
and the air returning to the cooling and heating equipment.
Proper balance and sealing of the duct system improves the efficiency of the heating
and air conditioning system and improves the indoor air quality of the home by reducing
the amount of airborne pollutants that enter homes from spaces where the ductwork
and/or equipment is located. The manufacturer and the U.S. Environmental Protection
Agency’s Energy Star Program recommend that central duct systems be checked by a
qualified contractor for proper balance and sealing.
2.2 CHECKING PRODUCT RECEIVED
Immediately upon receipt, all cartons and contents should be inspected for transit dam-
age. Units with damaged cartons should be opened immediately. If damage is found, it
should be noted on the delivery documents and a damage claim filed with the delivering
carrier.
After unit has been delivered to the job site, remove the unit from the carton taking care
not to damage the unit. Check the unit rating plate for unit model number, unit size, coil
model, voltage, phase, etc. to assure the unit matches the job specifications.
'5$+
$
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7
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FIGURE 2
MODEL NUMBER NOMENCLATURE
2.3 MODEL NUMBER NOMENCLATURE
