Johnson Controls L-Series User Manual

FORM 145.05-EG2 (618)
JOHNSON CONTROLS
71
Guide Specifications
CABINET CONSTRUCTION
Each unit shall be completely factory assembled and shipped in one piece or in multiple
pieces if required. Unit base shall be constructed out of formed 10-gauge galvanized steel
frame and 16-gauge bottom welded together for superior strength. Lifting brackets shall
be bolted on the unit base with and shall accept hooks.
Unit framework shall be fabricated from formed galvanized steel members of 12-gauge
and 16-gauge pre-painted galvanized steel. Exterior cabinet component and access pan-
els shall be constructed of a minimum of 18-gauge pre-painted galvanized steel. Access
panels for electrical compartment and compressors and refrigeration specialties shall be
hinged. All the refrigerant specialties like thermodynamic expansion valves, sight glass,
pressure transducers, high pressure switches shall be out of the conditioned air stream.
All access panels shall be 2-inch deep and insulated with 2-inch thick, 1.5 lb/cu ft density
matt faced fiberglass insulation where necessary. Walls separating compressor compart-
ment from conditioned space shall be insulated with fiberglass. Fan section shall have an
insulated double walled hinged walk-in door with glass window to access fan and drive
components. This door shall have pressure release safety latch to protect service personnel
in case the fan section is pressurized when opening the door. Matt faced insulation in fan
section roof and left and right sides shall be covered with 20-gauge perforated galvanized
sheet metal to provide additional sound attenuation.
Installation manual, start-up form, operating bulletin, maintenance bulletin, and a hard
copy of the electrical wiring diagrams are supplied inside each unit. Units shall have
labels to indicate caution areas for servicing the unit. The data plate (nameplate) is per-
manently attached to the unit on the external panel next to the user interface panel on the
front of the unit.
FILTRATION
The filters shall be face-loading (removable from the back of the unit). For servicing the
filters when return air is ducted, hinged and latched access door shall be provided on Left
side of the unit. To improve indoor air quality and reduce filter changes, 4-inch thick
filters shall be provided with a maximum face velocity of 500 FPM. The minimum effi-
ciency shall be MERV 8 (efficiency 30%). Optionally, MERV 13 filters shall be provided.
The construction of the filter shall have media resistant to water consisting of mini pleats.
When filters with rating higher than MERV 8 are used, filter section shall be house 4-inch
thick, MERV 8 pre-filters. The pre-filters shall be upstream of the higher efficiency filters.
All filters shall be Class II.
COOLING COIL
Direct Expansion (DX)
DX cooling coils shall be constructed of seamless 0.375-inch outside diameter copper
tubing with a minimum wall thickness of 0.012-inches. The copper tubes shall be me-
chanically expanded to the aluminum fins. Coils shall be a minimum of 4 rows, with
minimum 12 fins per inch. An adjustable thermal expansion valve (TXV) including an
external equalizer shall feed each circuit. The TXV shall be sized to operate with mini-
mum entering condenser water temperatures of 55.0°F. The coil shall be leak tested with
high-pressure nitrogen in a warm water bath.

Johnson Controls L-Series Specifications

General

Brand	Johnson Controls
Model	L-Series
Category	Air Conditioner
Language	English