| Options Rack For Hot Water Or Steam Coil
The rack for the hot water or steam coil is installed at the factory and mounted on the entering air side of the unit.
The rack will include the coil, piping, valve, and
controls wired to the unit control panel.
The coils are available in either "full height" or "reduced height" sizes. The rack will include an air distribution
baffel to assure relatively even air distribution
across the face of the coil. The coil inlet and outlet
connections are located on the same side as the condenser water connections.
The upstream side of the coil rack incorporates a filter rack for a flat bank of 2 inch thick filters. Access for filter
changeout is from the left side. The quantity and size
of filters is the same as for unit mounted filters.
Hot Water Heating Coils
Standard Trane coils will be installed in the heating coil rack. Only one row versions of coil types TT, WC are acceptable.
The Trane Coil Selection Program or Trane Heating Coil Catalog should be used to select the proper coil for your
application. Air temperature directly off the coil
(not mixed air temperature in the case of the reduced height coil) must not
exceed 104 degrees F.
Steam Heating Coils
Standard Trane coils will be installed in the heating coil rack. Only one row versions of coil type NS are acceptable.
The Trane Coil Selection Program or Trane Heating Coil Catalog should’ be used to select the proper coil for your
application.
Air temperature directly off the coil (not mixed air temperature in the case
of the reduced height coil) must not exceed 104 degrees
F .
Mechanical Specifications
Cabinet
The unit framework shall be formed structural steel members of 14 gauge galvanized steel. Exterior panels shall be
fabricated from 18 gauge galvanized steel. The unit
exterior shall be painted beige with a one mil coat of paint. The fan and compressor
sections shall be insulated with 1 inch of 1 pound
density fiberglass insulation.
The units shall be provided with removable panels to allow service access to
compressors, condensers, fan motor, fan bearings, coils
and valves. Removable panels shall be secured with quick-acting fasteners. The refrigerant sight glasses shall be accessible
during operation, The control panel door shall have
lift-off hinges.
Flexible Horizontal Discharge
(Optional) Units shall be provided with a factory installed horizontal discharge option that permits multi-directional
duct connections. The Flexible Horizontal discharge
shall be insulated with 2 inches of 1 pound density fiberglass for sound attenuation.
(Optional) Discharge openings of the multi-directional horizontal discharge shall be factory cut. Discharge openings shall
include duct collar transition for smooth airflow.
Compressor
Units shall have multiple compressors with independent circuits.
Compressors shall be manufactured by unit manufacturer.
Scroll compressors shall be heavy duty suction cooled type with suction screen,
centrifugal oil pump with dirt separator, oil sight
glass, oil charging valve, and crankcase heater,
Protective devices for low pressure, high pressure, high discharge temperature, and
motor temperature shall be provided. The compressors
shall be mounted on isolators for vibration isolation.
Condenser
One condenser shall be provided for each compressor. The condensers shall
be shell and tube design with removable heads and
mechanically cleanable tubes. Tubes shall be 3/4
inch copper. Condenser waterside working pressure shall be 400 psig. All
condenser water piping including cleanouts shall be
factory installed to provide single connections for
entering and leaving water.
Evaporator
The evaporator coil shall be seamless copper tubes expanded into aluminum
fins. Tubes shall be 1/2 inch with internally enhanced
surfaces. Coil shall have staggered tube arrangement with interlaced circuiting
and no more than 14 fins per inch. The drain pan shall
be fabricated of galvanized steel and be insulated with 1 inch of 1 pound density
fiberglass. Drain piping including a trap shall be
provided to the exterior of the unit.
Refrigerant Circuit
Refrigerant circuits shall be independent and completely piped including
filter driers; sight glasses; distributors; expansion
valves with adjustable superheat and external equalizer; and high pressure relief valves with 1/2 inch SAE flare connection.
Unit shall be provided with adequate means of frost
control, The circuits shall be tested, dehydrated and then charged with oil and refrigerant 22. |
