IM 830-6
40 www.DaikinApplied.com
Condensate Piping
Daikin cooling unit ventilators are designed for condensate
removal into a condensate disposal system. Do not connect
the unit drain connection so that condensate exits to
the outside and/or is exposed to freezing temperatures.
Installer is responsible for any damage that might be
caused from freezing condensate
. In applications with an
end compartment auxiliary drain pan, see the installation
instructions shipped with the auxiliary drain pan itself.
Direct Expansion R-410 (DX) Piping
DX coils have O.D. sweat connections. Interconnecting tubing
is field-supplied. See
correct tubing sizes.
Table 35: DX Coil (G) Connection Tubing
Unit Series
07
10
13
15
Suction Line O.D.
inches (mm)
¾ (19)
¾ (19)
⅞ (22)
⅞ (22)
Liquid Line O.D.
inches (mm)
¼ (6.35)
¼ (6)
⅜ (10)
⅜ (10)
Notes:
1.
All coils have the same end supply and return connections.
2.
All water stubs are 7/8" I.D. (female) sweat and all steam coils are
1⅛" (female) sweat connections. All coil connections terminate 9"
(229mm) from the end of the unit.
CAUTION
!
Wrap TXV valve with a quenching cloth and remove bulb from suction
line to avoid valve damage while brazing.
Proper ventilation is required for brazing. When brazing, use
quenching rags, shields, or other steps to protect unit ventilator
components from overheating damage (melting insulation, also
damage to valves, wiring, electronics, sensors, etc.).
During brazing, bleed nitrogen through the piping. Using field-
supplied material suitable for insulating refrigerant lines, wrap
the thermal expansion valve (TXV) bulb and the piping between
the TXV and the point where it enters the coil with at least one
thickness of the material. Likewise, insulate the suction line.
for typical piping and wiring.)
Provide proper insulation of supply and return piping. Proper
insulation prevents loss of unit ventilator capacity, overheating
of end compartment, and / or moisture dripping (see
).
Check that refrigerant pressure taps are installed in piping end
compartment for proper charging and setting of the TXV valve.
NOTICE
Figure 74: TXV Valve Piping Detail (Right Hand Shown)
STOP! Before Brazing
Use
A Quenching Cloth When Brazing, to Prevent Overheating The
TXV Valve Body (Avoid Valve Damage and Erratic Operation)
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