Daikin PreciseLine Series Installation And Maintenance Manual page 20

Drain Pan Piping
The drain pan requires a field-drilled hole made on the sides or
back, in-between the drain pan and bottom panel of the unit.
The drain pan connection is in the front-right corner, and must
be piped to the field-drilled hole. A P-trap is not included, and
must be added in the field. The drain pan is fully removable,
both for cleaning and for ease of installation.
IM 1267-7 • PRECISELINE AIR HANDLER
Direct Expansion (DX) Coils
Direct expansion coil connection guidelines are listed below.
1. On unit sizes 006 - 020 the coil distributor and suction
connections are inside the cabinet on the right-hand side
of the unit (air hitting back-of-head). On unit sizes 30 -
100 the distributor connection is inside the cabinet and
the suction line connection is outside the cabinet.
2. For connections inside the cabinet, piping penetration
holes must be field drilled and must be completely
within the drill area on the factory designated panel. The
diameter of the hole should be no more than 1/2" larger
than the pipe and gap around the pipe should be sealed
after installation.
3. The liquid line penetration should be made after the
thermal expansion valve has been installed such that
the hole aligns with the elbow off the bottom of the valve.
The thermal expansion valve should be located directly
below the distributor and connected to it with a short (2"
maximum) section of straight pipe.
3. The thermostat expansion valve must be an external
equalizer tube type. The equalization tube must be
connected to suction header for proper function. (See
page 72)
4. Use care when piping up the system, making sure
all joints are tight and all lines are dry and free of
foreign material. For typical refrigerant piping, see the
condensing unit product manual.
Figure 39: DX Interlaced Coil, Unit Sizes 030, 040, 050
Cabinet Sizes: 030, 040, and 050
Suction Circuit "B"
Discharge
Suction Circuit "A"
Note:
Left hand unit shown, right hand unit values same as left but opposite.
20
Installation
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.75 Drain
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