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All installations and services must be performed by qualified service personnel.
4
The duct system should again follow the current design standard of Air Conditioning Contractors of America
(ACCA) or ASHRAE Fundamentals
volume.
The most common location for the A-shaped coil (A style) is shown in Fig. 2.
Fig 2: Acceptable locations for the air conditioner evaporator coil.
NOTICE: The minimum coil pan clearance for a sectional or drum type heat exchanger is three inches unless
specified otherwise by the individual coil manufacturer.
A slab coil (H-style) is available for the horizontal air flow application on the OT5-11-16 furnaces refer to Fig. 3.
Fig. 3: An acceptable location for the air conditioner evaporator coil when used with a horizontal furnace.
To obtain proper airflow with an air conditioning coil installed on a belt drive unit, the motor and/or blower pulley
may need to be changed. On a direct drive unit, the blower motor speed may need to be changed depending upon the
size of the air conditioning system installed and the airflow resistance of the duct system.
NOTE: The horizontal units have direct drive blowers and no pulley or motor change is required.
C. FILTERS MOUNTED EXTERNAL TO THE FURNACE:
The filters of the OC2-5 mount in the return air plenum on the top opening on the top of the furnace. (For
installation detail, see figure 4).
Fig. 4: Air filter mounting location for the OC2-5 furnace.