I/O MANUAL Horizontal/Modular/Vertical/Rooftop AHU 2015pg
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17
COMMERCIAL AIRE PRODUCTS 501 Terminal Road, Fort Worth TX 76106
Tel: 817-624-0820
condensate drain piping. Condensate drain trapping piping must conform to all applicable governing
codes
HEATING COILS
One or two row hot water or steam preheating, heating or reheating coils can be factory installing in our
units, all valves and controls are field supplied and field installed. All precautions to prevent freezing
should be taken by consulting engineers or contractors during the installation.
CHILLED WATER COILS
Water piping
All piping must be supported independent of coils to prevent vibration and stress on coil headers. Swing
joints or flexible fittings must be provided to absorb expansion and contraction strains. Rigid piping
reduces the effectiveness of vibration isolators.
Water piping should always be connected so that the entering water is on the leaving air side of the coil.
Coils must be adequately vented in order to prevent air binding. Units are provided with manual air
vents mounted through manifold panel
.
Our units can have from two to 8 rows chilled water coils or any combination with pre heat and or
reheat coils up to 10 rows factory mounted. All control valves flow measuring devices and freeze
controls are field supply and field installed. All piping shall be in accordance with national and local
codes. Pressure limiting devices, backflow preventers, flow meters and all safety requirements are the
sole responsibility of consulting engineers and installing contractors.
REFRIGERANT PIPING
Always use the condensing unit manufacturer’s recommended line sizes. The suction line must be
insulated for satisfactory operation. Observe all condensing unit manufacturer’s installation
requirements. Use refrigerant grade copper only. If unit is to be used when installed as the indoor coil of
a heat pump, a bypass check valve must be used unless unit is equipped with a TXV which includes
bypass and check valve operations.
