PRODUCT DESIGN
4
DP13GM Package Gas Units are designed for outdoor in-
stallations only in either residential or light commercial appli-
cations and are available in 2 through 5 ton sizes. They are
designed for 208/230 volt single phase applications. (DP13GM
3, 4 and 5 ton models are also available for 230V 3 phase
applications. See Technical Manual RTD6312005.)
The connecting ductwork (Supply and Return) can be con-
nected for either horizontal or vertical airflow. In the vertical
application, a matching Roof Curb is recommended.
A return air filter must be installed behind the return air grille(s)
or provision must be made for a filter in an accessible loca-
tion within the return air duct. The minimum filter area should
not be less than those sizes listed in the Specification Sec-
tion. Under no circumstances should the unit be operated
without return air filters.
A 3/4" pipe is provided for removal of condensate water from
the indoor coil. (Do not reduce the drain line size).
NOTE:
Tighten drain to a maximum torque of 10 in-lbs.
Refrigerant flow control is achieved by use of restrictor ori-
fices. DP13GM units use the FasTest Access Fitting Sys-
tem which consists of 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.
NOTE: The core must not be removed from the saddle
until the refrigerant charge has been removed. Failure
to do so could result in property damage or personal
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.
The outdoor fan and indoor blower motors are single phase
permanent split capacitor type motors. DP13GM48***41**
and DP13GM60***41** models are equipped with EEM in-
door blower motors. EEM motors are constant torque mo-
tors with very low power consumption and are energized by a
24V signal from the ignition control. The EEM features an
integrated control module.
Air for condensing (cooling cycle) is drawn through the out-
door coil by a propeller fan, and is discharged vertically out
the top of the unit. The outdoor coil is designed for .0 static.
No additional restriction (ductwork) shall be applied.
Conditioned air is drawn through the filter(s), field installed,
across the coil and back into the conditioned space by the
indoor blower.
Some models of the DP13GM series package units use the
Compliant Scroll compressor, there are a number of design
characteristics which are different from the traditional recip-
rocating compressor.
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Due to their design Scroll compressors are inherently more
tolerant of liquid refrigerant.
NOTE
: Even though the com-
pressor section of a Scroll compressor is more tolerant
of liquid refrigerant, continued floodback or flooded start
conditions may wash oil from the bearing surfaces caus-
ing premature bearing failure.
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These Scroll compressors use "POE" or polyester oil
which is NOT compatible with mineral oil based lubricants
like 3GS. "POE" oil must be used if additional oil is
required.
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Compliant scroll compressors perform "quiet" shutdowns
that allow the compressor to restart immediately without
the need for a time delay. This compressor will restart
even if the system has not equalized.
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Operating pressures and amp draws may differ from stan-
dard reciprocating compressors. This information may be
found in the "Cooling Performance Data" section.
