Specifications

2
INTRODUCTION
Unit Identification —
The 39L units are identified by
the 18-digit part number listed on the serial plate. The part
number describes all component, coil, motor, drive, and control
selections. See Fig. 1-3 for unit identification.
CAUTION
DO NOT re-use compressor oil or any oil that has been
exposed to the atmosphere. Dispose of oil per local codes
and regulations. DO NOT leave refrigerant system open to
air any longer than the actual time required to service the
equipment. Seal circuits being serviced and charge with
dry nitrogen to prevent oil contamination when timely
repairs cannot be completed. Failure to follow these proce-
dures may result in damage to equipment.
CAUTION
SECURE drive sheaves with a rope or strap before work-
ing on a fan to ensure that rotor cannot free-wheel.
DO NOT restore power to unit until all temporary walk-
ways inside components have been removed.
NEVER pressurize equipment in excess of specified test
pressures.
PROTECT adjacent flammable material when welding or
flame cutting. Use sheet metal or asbestos cloth to contain
sparks. Have a fire extinguisher at hand and ready for
immediate use.
IMPORTANT: The installation of air-handling units and all
associated components, parts, and accessories which make
up the installation and subsequent maintenance shall be in
accordance with the regulations of ALL authorities having
jurisdiction and MUST conform to all applicable codes. It
is the responsibility of the installing contractor to determine
and comply with ALL applicable codes and regulations.
Field-supplied motors should be Underwriters Laboratories
(UL) or Canadian Standards Association (CSA) approved.
Field wiring must comply with National Electrical Code
(NEC) and all local requirements.
Fig. 1 — Unit Identification
LEGEND
Fig. 2 — 39L Model Number
CV — Constant Volume
DX — Direct Expansion
VAV — Variable Air Volume
39L C 10 GK C H E A C G - A
Due to the complexity of the (18 position) 39L model number, use the “verify model number”
function in the AHUBuilder® software for a detailed model explanation. The description below
can be used as a general model guide.
Pos. 1-3: Unit Type — 39L Air Handler
Pos. 4: Unit Model — how the unit is configured. Refer to Fig. 3.
Pos. 5-6: Unit Size — Ranges from 03 to 25.
Pos. 7-8: Draw-Thru Options — Includes the sections that will make up the unit.
Pos. 9-12: Coil Type and Arrangement — Describes the coil type (chilled water, CX, heating
only, etc.), fins, rows and circuit information.
Pos. 13-15: Fans — Describes fan discharge, fan speed, and motor information.
Pos. 16: Controls — Describes the AirManager™ control offering (CV, VAV) and the
components that they include.
Pos. 17: F1/F2 Motors — Depending upon positions 13 and 17, F1 or F2 motors may be
substituted for top mounted motor conduit boxes.
Pos. 18: Special Order — Allows copper fin coils and/or .025 in. wall tubes.
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