IM709 3
Introduction
General Description
Models SWTO18C through 040C are factory assembled,
refrigerant charged and tested, water cooled packaged air
conditioning units designed for ducted applications.
Each unit is comprised of three distinct sections:
●
Main cooling/heating
●
Filter/waterside economizer
●
Fan section
The unit is designed for easy disassembly for access to
mechanical rooms, freight elevators, etc. The disassembly of
the sections does not require the breaking of refrigeration
lines. When a unit is knocked down the maximum section
width including fastener heads is less than 341/2 inches.
Once in the mechanical room the unit is easily reassembled.
Each unit contains multiple scroll compressors, water cooled
condensers, multi-circuit evaporator, thermostatic expansion
valves, interconnecting refrigerant piping, forward curved
centrifugal fan, belt drive, fan motor, 4” pleated filters and
all necessary operating and safety controls.
All rigging, installation, power and control wiring external to
the unit, and condenser water and condensate piping are the
responsibility of the installer.
The MicroTech II™ self-contained unit controller is standard
equipment on “C” vintage units. For a detailed description of
the MicroTech components, input/output configurations,
field wiring options and requirements, and service proce-
dures, refer to Bulletin No. IM 710, “MicroTech II Self-con-
tained Unit Controller’ For a description of operation and
information on using and programming the MicroTech II
unit controller, refer to the appropriate operation manual
(see Table 1).
Table 1: Self-contained unit operation manual literature
Inspection
When the equipment is received, check all items carefully
checked against the bill of lading to verify a complete ship-
ment. The shipping receipt should not be signed until all
items have been accounted for. All units should be carefully
inspected for damage upon arrival. All shipping damage
should be reported to the carrier and a claim filed. The unit
serial plate should be checked before unloading the unit to be
sure that it agrees with the power supply available
SELF CONTAINED UNIT
CONTROL CONFIGURATION
OPERATION MANUAL
BULLETIN NUMBER
Discharge Air Control (VAV or CAV) OM 711
Space Comfort Control (CAV-ZTC) OM 712
Nomenclature
SWT-040-C
Self-contained
Water cooled
Top discharge
Vintage
Nominal tons
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