Trane OABD OABE OADD OADE OAGD OAKD OAKE OAND OANE Catalog
80
OAU-PRC001E-EN
Mechanical Specifications
processor controls are provided for all 24-volt control functions. The resident control algorithms
will make all heating, cooling and/or ventilating decisions in response to electronic signals from
sensors measuring outdoor temperature and humidity. The control algorithm maintains accurate
temperature control, minimizes drift from set point, and provides better building comfort. A
centralized micro-processor (RTRM) will provide anti-short cycle timing for a higher level of
machine protection. Terminals are provided for a field installed dry contact or switch closure to put
the unit in the Occupied or Unoccupied modes.
will make all heating, cooling and/or ventilating decisions in response to electronic signals from
sensors measuring outdoor temperature and humidity. The control algorithm maintains accurate
temperature control, minimizes drift from set point, and provides better building comfort. A
centralized micro-processor (RTRM) will provide anti-short cycle timing for a higher level of
machine protection. Terminals are provided for a field installed dry contact or switch closure to put
the unit in the Occupied or Unoccupied modes.
Options
Electric Heating Option
Primary heat is supplied using Electric Resistance heaters. Heaters shall meet the requirements of
the National Electrical Code and shall be listed by Underwriters Laboratories for zero clearance to
combustible surfaces and for use with heat pumps and air conditioning equipment. Heating
elements shall be open coil, 80 percent nickel, 20 percent chromium, Grade A resistance wire.
Type C alloys containing iron or other alloys are not acceptable. Coils shall be machine crimped into
stainless steel terminals extending at least 1 inch into the air stream and all terminal hardware shall
be stainless steel. Coils shall be supported by ceramic bushings staked into supporting brackets.
Heater frames and terminal boxes shall be corrosion resistant steel. Unless otherwise indicated,
the terminal box shall be NEMA 1 construction and shall be provided with a hinged, latching cover.
Heaters shall be furnished with a disc type, automatic reset thermal cutout for primary over
temperature protection. All heaters shall also be furnished with disc type, load-carrying manual
reset thermal cutouts, factory wired in series with heater stages for secondary protection. Heat
limiters or other fusible over temperature devices are not acceptable. Control will be SCR type. Unit
shall be suitable for use with Electric Resistance Heat. Refer to
the National Electrical Code and shall be listed by Underwriters Laboratories for zero clearance to
combustible surfaces and for use with heat pumps and air conditioning equipment. Heating
elements shall be open coil, 80 percent nickel, 20 percent chromium, Grade A resistance wire.
Type C alloys containing iron or other alloys are not acceptable. Coils shall be machine crimped into
stainless steel terminals extending at least 1 inch into the air stream and all terminal hardware shall
be stainless steel. Coils shall be supported by ceramic bushings staked into supporting brackets.
Heater frames and terminal boxes shall be corrosion resistant steel. Unless otherwise indicated,
the terminal box shall be NEMA 1 construction and shall be provided with a hinged, latching cover.
Heaters shall be furnished with a disc type, automatic reset thermal cutout for primary over
temperature protection. All heaters shall also be furnished with disc type, load-carrying manual
reset thermal cutouts, factory wired in series with heater stages for secondary protection. Heat
limiters or other fusible over temperature devices are not acceptable. Control will be SCR type. Unit
shall be suitable for use with Electric Resistance Heat. Refer to
.
Indirect Gas-Fired Heating Option
Primary heat is supplied using indirect fired gas heating. The heating section shall have a
progressive tubular heat exchanger design using stainless steel burners and Type 409 stainless
progressive tubular heat exchanger design using stainless steel burners and Type 409 stainless
Figure 57.
ER Heater