PRODUCT DESIGN
LOCATION & CLEARANCES
In installations where the unit is installed above ground level and not serviceable from the ground (Example: Roof Top in- stallations) the installer must provide a service platform for the service person with rails or guards in accordance with local codes or ordinances.
NOTE: Roof overhang should be no more than 36" and provisions made to deflect the warm discharge air out from the overhang.
Minimum clearances are required to avoid air recirculation and keep the unit operating at peak efficiency.
WARNING
TO PREVENT POSSIBLE DAMAGE, THE UNIT SHOULD REMAIN IN AN UPRIGHT POSITION DURING ALL RIGGING AND MOVING OPERATIONS. TO FACILITATE LIFTING AND MOVING IF A CRANE IS USED, PLACE THE UNIT IN AN ADEQUATE CABLE SLIDE.
Refer to Roof curb Installation Instructions for proper curb in- stallation. Curbing must be installed in compliance with the National Roofing Contractors Association Manual.
Lower unit carefully onto roof mounting curb. While rigging unit, center of gravity will cause condenser end to be lower than supply air end.
Roof Curb
*PH Package Units are designed for outdoor installations only in either residential or light commercial applications.
The connecting ductwork (Supply and Return) can be connected for horizontal discharge airflow. In the down discharge applica- tions, a matching Roof Curb (PGC101/102/103) is recom- mended for horizontal models only.
A return air filter must be installed behind the return air grille(s) or provision must be made for a filter in an accessible location within the return air duct. An internal filter rack (GPH13MFR102 & 103) and an external filter rack
A 3/4" - 14 NPT drain connector is provided for removal of con- densate water from the indoor coil. In order to provide proper condensate flow, do not reduce the drain line size.
Refrigerant flow control is achieved by use of TXV. These mod- els use the FasTest Access Fitting System, with a saddle that is either soldered to the suction and liquid lines or is fastened with a locking nut to the access fitting box (core) and then screwed into the saddle. Do not remove the core from the saddle until the refrigerant charge has been removed. Failure to do so could result in property damage or per- sonal injury.
The single phase units use permanent split capacitors (PSC) design compressors. Starting components are therefore not required. A low MFD run capacitor assists the compressor to start and remains in the circuit during operation.
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