Compu-aire CELHP Installation, Operation, Maintenance And Parts Manual page 7

GENERAL
The equipment covered in this manual is to be installed by tralned, experienced service and installation
technicians.
The refrigerant system is conpletely assembled and charged. All internal wiring is complete.
The unit is designed for use with or without duct work. Flanges are provided for attaching the supply and
return ducts.
These instructions explain the reconmended method to install the air cooled self-contained unlt and the
electrical wiring connections to the unit.
These instructions and any instructions packaged with any separate equipment required to make up the entire
air conditioning system should be carefully read before beginning the installation. Note particularly
"Starting Procedure" and any tags and/or labels attached to the equiplent.
While these instructions are intended as a general recormended guide, they do not supersede any national
and/or local codes in any way. Authorities having jurisdiction should be consulted before the installation
is made. See Page 1 for information on codes and standards.
Size of unit for a proposed installation should be based on heat loss calculation made according to nethods
of Air Conditioning Contractors of Amer~ca (ACCA). The air duct should be installed in accordance wlth the
Standards of the National Fire Protectxon Assoc~ation for the Installation of Air
Ventilating systems of Other Than Residence Type. NFPA No. 90A, and Residence Type Warm Air Heatlng and Air
Conditioning Systems. NFPA No.
should adhere to local codes.
DUCT WORK
is nore critical of proper operating charge and an adequate duct system than a straight air
conditioning unit. All duct work, supply and return. must be properly sized for
requirement of the equipment. Air Conditioning Contractors of America (ACCA) is an excellent guide to proper
sizing. A11 duct work or portions thereof not in the conditioned space should be properly insulated in order
to both mnserve energy and prevent condensation or moisture damage,
Design the duct work according to nethods given by the hir Conditioning Contractors of America
duct runs through unheated spaces, it should be insulated with a mininun of one inch of insulation. Use
insulation with a vapor barrier on the outside of the insulation. Flexible joints should be used to connect
the duct work to the equipnent in order to keep the noise transnission to a ninimun.
A
Ill-inch clearance to conbustible material for the first three feet of duct attached to the outlet air
frame is required.
Ducts through the walls must be insulated and all joints taped or sealed to prevent air or moisture entering
the wall cavity,
CAUTION: Some installations may not require any return air duct. A metallic return air grille is required
with installations not requiring a return air duct. The spacing between louvers on the grille
shall not be larger than
Any grille that meets the
or factory for ordering information. I f using a return air filter grille, filters must
sufficient size to allow a maximum velocity of 4 0 0
If no return air duct is used, applicable installation codes may limit this cabinet to installation
only in a single story structure.
Where local regulations are at a variance with instruct~ons, Installer
inches.
5/8 inch louver criteria, may be used. It i s recmnded that
and
the design air flow
When
be of