Greenheck Packaged DX Module (474681) - Manual (Page 3)

3 Packaged DX Module for Make-Up Air Unit
Product Overview
The Packaged DX Module for make-up air is a
horizontally configured unit that is installed as a
package in make-up air units and is designed for
outdoor installations. The Packaged DX Module is used
to temper the air that is supplied to the building. The
make-up air unit is designed to provide sufficient air to
replace air that is exhausted from the building and this
module is designed to provide necessary cooling.
The DX system comes fully charged with R-410A
refrigerant from the factory and is ready for operation
upon arrival.
Units may be supplied with one or two compressors
based on required cooling capacity. All units with
multiple compressors allow for staging of compressors
to meet a wider range of outdoor air loads while
reducing the number of cycles per compressor.
Compressed Refrigerant
All packaged DX modules are charged with
environmentally friendly R-410A compressed refrigerant.
Do not use tools or parts designed for other refrigerants
on this unit.
Safety Listing
Make-up air units are listed per ANSI/UL 1995, Heating
and Cooling Equipment and are ETL Certified.
Supplemental Installation, Operation and
Maintenance Manuals
Refer to the Installation, Operation and Maintenance
manual for the Make-Up Air unit for additional
information.
Models and Capacities
The Packaged DX Module for Make-Up Air Units is
manufactured in three different platform sizes, each
of which has several
different output tonnage
options. Examine
shipping documents to
verify correct model of
the module as received.
Model Number
A metal plate is located on the fixed panel access to the
control center. The plate is marked with the Platform
Type and Tonnage (for example, H12-6). Record the
model number here:
Subassemblies:
Coils
Every module is supplied with a single DX evaporator
coil. If there is only one cooling circuit, then the DX coil
is not divided. If two cooling circuits are specified, then
the DX coil will be a split-face. A single condenser coil is
attached to the exterior of the module. If more than one
cooling circuit is present, that condenser coil will be of
split-face configuration.
Dampers
Only an inlet damper may be installed in a PDX module
and it will only be found when the module is installed in
either model IGX or MSX that was not ordered with an
inlet damper module.
DX System
The DX system in the module is a complete, sealed unit
with compressed R-410A refrigerant. It consists of one
or two compressors, evaporator and condenser coils
and the following integral components:
• expansion valves
• liquid line filter-drier
• service / charging valves
• moisture indicating sight glass
• crankcase heater on each compressor
Each DX system incorporates the following:
• high pressure manual reset cutout
• low pressure auto-reset cutout
Platform Tonnage
H12 3, 5, 6, 8
H22 7, 9, 10
H32 10, 12, 16
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