ENVISION SERIES AIR HANDLER INSTALLATION MANUAL
General Installation Information
Air Handler Sizing Selection
The Envision Air Handlers are designed for R410a refrigerant and should be matched with Envision Split series compressor section according to the table below.
Air Handler | Indoor Split Model | Indoor Split Model | Outdoor Split Model | Airflow(CFM) | Electric Heat (kW) | |
(Single) | (Dual Capacity) | (Dual Capacity) | ||||
|
|
| ||||
|
|
|
|
|
| |
NAH022A***1R | NSZ022 | - |
| 800 | 5 | |
|
|
|
|
|
| |
NAH026A***1R | - | NDZ026 | NDS026 | 925 | 5 | |
|
|
|
|
|
| |
NAH030A***1R | NSZ030 | - | - | 980 | 5, 10 | |
|
|
|
|
|
| |
NAH036A***1R | NSZ036 | - | - | 1225 | 5, 10 | |
NAH036A***1R | - | NDZ038 | NDS038 | 1225 | 5, 10 | |
|
|
|
|
|
| |
NAH042A***1R | NSZ042 | - | - | 1425 | 10, 15 | |
|
|
|
|
|
| |
NAH048A***1R | NSZ048 | - | - | 1625 | 10, 15 | |
|
|
|
|
|
| |
NAH048A***1R | - | NDZ049 | NDS049 | 1625 | 10, 15 | |
|
|
|
|
|
| |
NAH060A***1R | NSZ060 | - | - | 1760 | 10, 15, 20 | |
|
|
|
|
|
| |
NAH060A***1R | - | NDZ064 | NDS064 | 1760 | 10, 15, 20 | |
|
|
|
|
|
| |
NAH060A***1R | NSZ070 | - | - | 1760 | 10, 15, 20 | |
|
|
|
|
|
| |
NAH060A***1R | - | NDZ072 | NDS072 | 1760 | 10, 15, 20 | |
|
|
|
|
|
|
6/9/08
Moving and Storage
If the equipment is not needed for immediate installation it should be left in its shipping carton and stored in a clean, dry area. Units must only be stored or moved in the normal “up” orientation.
finished living area to provide protection from water dam- age in case of plugging of the air handler primary drain line. The secondary drain line should terminate somewhere that is easily visible by the homeowner. Be certain to show the homeowner the termination location of the secondary drain line and to explain its purpose.
Unit Location
Locate the unit in an indoor area that allows for easy re- moval of the filter and access panels (the air handler units are not approved for outdoor installation). Location should have enough space for service personnel to perform main- tenance or repair. Provide sufficient room to make refriger- ant, electrical and duct connections. If the unit is located in a confined space, such as a closet, provisions must be made for return air to freely enter the space by means of a louvered door, etc. The air handler section may be installed on any level surface strong enough to support its weight. When installed in a closet or on a stand, it should be mounted on vibration absorbing material slightly larger than the base to minimize vibration transmission to the building structure.
When installed in an attic or above a drop ceiling, the instal- lation must conform to all local codes. If the unit is sus- pended and installed in the horizontal position, the entire length of the unit should be supported. If the application requires the air handler to be installed on the attic floor then the unit should be set in a full size secondary drain pan. In this case the secondary drain pan should be set on top of a vibration absorbing mesh. The secondary drain pan is usually placed on a plywood base. A secondary drain pan should be used when equipment is installed over a
Duct System
The duct system should be sized to handle the design air- flow quietly and efficiently. To maximize sound attenuation of the unit blower, the supply and return plenums should include an internal duct liner of fiberglass or constructed of ductboard for the first few feet. On systems employing a metal duct system, canvas connectors should be used between the unit and the ductwork. If air noise or exces- sive airflow is a problem, the blower speed can be changed. Application of the unit to
If the unit is connected to existing ductwork, check the duct system to ensure that it has the capacity to accommodate the air required for the unit application. If the duct is too small, as in the replacement of heating only systems, larger ductwork should be installed. All existing ductwork should be checked for leaks and repaired as necessary.
4
