ENVISION SERIES INSTALLATION MANUAL
General Installation Information
Safety Considerations
WARNING: Before performing service or maintenance operations on a system, turn off main power switches to the indoor unit. If applicable, turn off the accessory heater power switch. Electrical shock could cause personal injury.
Installing and servicing heating and air conditioning equipment can be hazardous due to system pressure and electri- cal components. Only trained and qualified service personnel should install, repair or service heating and air conditioning equipment. Untrained personnel can perform the basic maintenance functions of cleaning coils and cleaning and replacing filters. All other operations should be performed by trained service personnel. When working on heating and air conditioning equipment, observe precautions in the literature, tags and labels attached to the unit and other safety precautions that may apply, such as the following safety measures:
•Follow all safety codes.
•Wear safety glasses and work gloves.
•Use a quenching cloth for brazing operations.
•Have a fire extinguisher available for all brazing operations.
Moving and Storage
Move units in the normal “up” orientation. Units may be moved and stored per the information on the packaging. Do not stack more than three units in total height. Do not attempt to move units while stacked. When the equipment is received, all items should be carefully checked against the bill of lading to be sure all crates and cartons have been received. Examine units for shipping damage, removing the units from the packaging if necessary. Units in question should also be internally inspected. If any damage is noted, the carrier should make the proper notation on the delivery receipt, acknowledging the damage.
Unit Location
Locate the unit in an indoor area that allows for easy removal of the access panels. Location should have enough space for service personnel to perform maintenance or repair. Provide sufficient room to make water, electrical and refrigerant line connections. Any access panel screws that would be difficult to remove after the unit is installed should be removed prior to setting the unit. Care should be taken when units are located in unconditioned spaces to prevent damage from frozen water lines and excessive heat that could damage electrical components.
Air Coil Location
Refer to the air handler manufacturer’s instructions for the blower coil unit for details on installing the air handling portion of the system.
Condensate Drain
Follow the blower coil manufacturer’s instructions.
Duct System
All blower coil units/air coils must be installed as specified by the manufacturer’s installation instructions; however, the following recommendations should considered to minimize noise and service problems.
An air filter must always be installed upstream of the air coil on the return air side of the air handler or furnace. If there is limited access to the filter rack for normal maintenance, it is suggested that a return air filter grill be installed. Be sure that the return duct is properly installed and free of leaks to prevent dirt and debris from bypassing the filter and plugging the air coil.
In applications using galvanized metal ductwork, a flexible duct connector is recommended on both the supply and return air plenums to minimize vibration from the blower. To maximize sound attenuation of the unit blower, the supply and return plenums should include an internal duct liner of