Installation Site; Location; Cabinet Configuration Options; Unit Mounting - Johnson Controls DSH024C Series Installation Operation & Maintenance

SECTION 1 – INSTALLATION

INSTALLATION SITE

Lock all electrical power supply switches in
the off position before installing the unit.
Failure to disconnect the power supply may
result in electrical shock or even death.

Location

To ensure the unit operates at maximum efficiencies,
choose a dry indoor area where the temperature is con-
trolled between 50.0°F and 115.0°F. When choosing
a location to install the unit, consider the surrounding
area. Occupants may object to common vibration and
sound levels associated with the unit.
Failure to allow adequate space between
units, condenser intake, and discharge
can result in poor unit performance and
possible unit failure.
Install thermostats, air supplies, and returns so that
each unit operates only on an individual unit control.
To assure fast drainage of the condensate run-off, the
unit can be slightly pitched in the same direction as the
drain pan outlet.

CABINET CONFIGURATION OPTIONS

Horizontal units have two parts: an evaporator and a
condenser section. To minimize installation costs and
delays onsite, it is recommended to order the units in
the appropriate configuration. Units 2–8 tons can be
ordered from the factory as either packaged or split.
The 10 ton unit only comes factory-split.
Here are examples of cabinet configurations. See Nomen-
clature on page 4 for other available options:
P Applies to only 2–8 ton models. The unit comes
assembled as a packaged unit and factory-
charged with R-410A refrigerant.
P is ideal for installations where the unit is in-
stalled as a packaged system. While moving the
equipment into position or during installation,
no separation is required.
10
S The unit is factory-split and factory-charged with
R-410A refrigerant. The unit comes with refrig-
erant shut-off/coupling valves that hold charge
in both the condenser and evaporator sections.
S is ideal for installations where the unit is in-
stalled as a packaged system. Separate evapora-
tor and condenser sections are required during
installation to move the equipment through tight
spaces (for example, hallways or elevators).
Both evaporator and condenser sections contain
R-410A refrigerant.
N The unit is factory-split with a nitrogen-holding
charge only. No refrigerant shut-off/coupling
valves are included.
N is for installations where the unit is installed as
a split system. Separate condenser and evapora-
tor sections facilitate moving the equipment into
position.

UNIT MOUNTING

Flanges for all duct connections, corner securing
brackets, and refrigerant tubing couplings (S cabinet
configurations only) ship in the condensing section of
the unit for field installation. Duct flanges for evapora-
tor return are incorporated into the filter rack.
Before assembling and piping the units, remove the tie-
down straps and brackets from the refrigerant piping and
couplings. See Figure 1 (8 and 10 ton models are shown).

FIGURE 1 - SECURING STRAPS AND BRACKETS

FORM 145.32-IOM5
ISSUE DATE: 04/08/2019
LD27691, LD27692