Removing Shipping
Restraints
Mechanical restraints are used to secure the spring-mounted
fan during shipment . Remove the restraints and the shipping
blocks after unit is set in its final location.
Shipping
All units leave the factory assembled completely . Units
intended to be disassembled contain a nitrogen holding
charge . Non-modular units will hold the manufacturer
recommended refrigerant charge (R410A) .
Arrival at Installation Site
The unit must be unloaded in accordance with the rigging
instructions displayed on the outside of the unit or in the
installation manuals inside . The lifting lugs located inside
the unit base rail are the only lifting lugs to use for lifting the
complete unit . Never use any individual section lifting lugs to lift
the whole unit .
Some items are shipped lose inside units such as filters and
rubber isolator pads . All units should be inspected before
unloading and all lose items secured .
Disassembling and
Reassembling Modular Units
To avoid injuries or damage to the equipment, please read the
installation manual (IM 919) before rigging or disassembling
the unit . Follow all the warning and caution labels placed on
the unit .
Disassembly of Sections
If the unit is ordered with the modular construction (Unit
Configuration Code 43 = 1) option, the refrigerant circuits are
shipped with a nitrogen holding charge (Unit Configuration
Code 11 = NP) and can be disassembled into four pieces. A
unit not originally intended to be disassembled will have R410A
refrigerant factory charge that must be properly recovered
before disassembly .
Figure 4
illustrates the four distinct sections;
1 . Coil/access section,
2 . Supply fan section,
3 . Compressor/condenser section and
4 . the Control panel .
Figure 4: Self-Contained Unit with Four Sections Separated
In addition to refrigerant and water piping, the unit has
various standard and optional components that cross
between sections which will require field disconnection and
reconnecting or mounting:
Coil/Access Section
• Mixed air sensor (MAT)
• Plastic tube for clogged filter switch (PC5)
• Freezstat(s) (FS*)
• Actuator Harness(es) (ACT3 & ACT4)
• Ultra Violet Light harness (es)
• Waterflow Sensor (WFS)
• Entering Water Temperature (EWT)
Supply Fan Section
• Discharge Air Temperature (DAT)
• Plastic tube for air flow switch (PC7) and Duct
High Limit (DHL)
• Supply Fan motor power harness
• Supply Fan Door Switch (S21)
• Electric Heat high limit switch(es) (HL*)
• Electric Heat power harness
Compressor/Condenser Section
• Pressure Transducer Harnesses (PSR1 & 2)
• Compressor High Pressure Switches (HP*)
• Compressor Low Pressure Switches (LP*)
• Compressor Motor Protection (MP*)
• Compressor power harnesses
External
• Return Air Temperature (RAT)
• Plastic tube for the Static Pressure Sensor(s) (SPSI & 2)
• Outside Air Temperature (OAT)
• Zone or Space Temperature (ZNT1)
* Quantities vary with unit size
Coil/Access Section
Supply Fan Section
Compressor/Condenser Section
Control Panel
Base Fish Plates
IM 1032-2 • Self-Contained Air Conditioning System 6
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