Carrier EACAAXCC0014 Installation And Operation Manual page 19

PLANNING THE INSTALLATION
A_ation
The air cleaners are used in forced air heating cooling and ventilating systems. The
air cleaner should be installed in the system so that all the system air is circulated
through the air cleaner. The air cleaner will only remove the airborne contaminants
delivered to it. Maximum performance is obtained when the system blower is set for
continuous operation.
Installation Requirements
The best location for the air cleaner is in the return air duct next to the blower
compartment. In this location, the blower motor and cooling coils will be kept clean.
DO NOT INSTALL THE AIR CLEANER
IN THE DISCHARGE AIR DUCT.
Before installing the air cleaner, consider the application and type of HVAC system
present. Refer to the section entitled Typical Mounting Positions,
for the most common types. If a transition between the ductwork and air cleaner is
required, refer to section entitled Transitions. The unit must be readily accessible
for periodic inspection and cleaning of the prefilters and electronic cells to maintain
maximum efficiency and trouble-free operation.
Air Conditioninq
The air cleaner should be installed upstream of the cooling coil. This will keep the
coil clean and reduce air conditioning coil maintenance. Improved cooling
efficiency is the result and directly affects energy costs. A clean coil, will reduce
utility costs. If the air cleaner is downstream of the cooling coil, condensation will
form on the cooled collector plates when the air conditioner cycles. This will allow
water droplets to form on the collector plates and cause nuisance arcing. Arcing will
reduce air cleaner efficiency and reduce the life of the high voltage power supply.
Humidifiers
An evaporative humidifier can be mounted upstream of the air cleaner. It is best to
install an atomizing humidifier downstream of the air cleaner because hard water
salt deposits and water droplets may damage the air cleaner. If an atomizing
humidifier must be mounted upstream of the air cleaner:
1. Mount it as far upstream as possible. (Recommended at least 6 feet.)
2. Install a standard disposable furnace filter between the humidifier and
the air cleaner to trap water droplets and hard water salts.
3.Clean the air cleaner more frequently to prevent a hard water salt
buildup.
Outdoor Air
When outdoor air is added to the return air duct, sufficient heat should be added to
maintain the return air temperature at 40°F (4°C) minimum. Lower temperatures can
cause ionizer wire failure.
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