AAON HB Series, Installation And User Manual

Page: 9 / 32

9
Modulating Hot Gas Reheat and Hot Gas
Bypass Systems on DX Units
Some DX cooling units may contain Modulating Hot
Gas Reheat (MHGRH) and/or Hot Gas Bypass
(HGBP) systems as factory installed options. Piping
and valves for these systems will be located on the
inside wall of the condenser section. The condenser
top must be removed for access to these components.
Filter Sizes
Cabinet Construction
All HB units are insulated with closed-cell polyurethane
foam, which has twice the R-value of fiberglass
insulation. All cabinet walls and roof use double-wall
G90 galvanized steel. The solid core foam interior
provides a rigid, impact resistant surface. All panels
have a thermal break with no metal-to-metal contact
from outside to inside.
Thermal Break
Foam Core
Double-Wall
Figure 9b, High Performance Composite Panel
All 2-5 Ton HB Packaged Units
Qty. Size
2 20” x 25” x 2”
Table 9.1, Pleated Filter Sizes
Piping to
Compressor and
Coil Compartments
Receiver
Tank
Check
Valve
MHGRH
Valves
HGBP
Valve
Figure 9a, MHGRH and HGBP System