Trane HUV Installation Operation & Maintenance page 22

Crossover Piping
The selection of crossover piping
allows the contractor the ability to
install field piping for unit connec-
tion prior to receipt of the vertical
unit ventilators. The factory in-
stalled crossover pipe is located at
the back of the unit along the wall.
The crossover pipng extends 1-
inch beyond the length of the unit
on both sides for ease of field con-
nection.
Note:
• For dimensional data, see jobsite connection section on Pages 104
and 105 of this catalog.
• Crossover piping is not available with the end device control package.
2 2
Piping
Crossover Piping
The crossover piping option is
available for:
• 2-pipe heating/cooling
changeover coil.
DIGIT 12 = A
• 2-pipe heating ONLY coil
DIGIT 12 = H
• 4-pipe heating and cooling
coil DIGIT 12 = D. For 4-pipe
coils, the crossover is facto-
ry supplied for the main
cooling coil ONLY.
Figure 23: 2-pipe crossover piping
The type M crossover copper is
available as either 1-3/8-inch in-
side diameter (I.D.) sweat connec-
tion or 2-1/8-inch inside diameter
(I.D.) sweat connection. A 7/8-inch
inside diameter (I.D.) shut-off ball
valve is supplied at both the sup-
ply and return connections. These
connections can be found in either
the right or left hand end pocket.
Insulation of the crossover pipes is
provided for all applications. The
insulation is 3/8-inch thickness.
Expansion compensation between
the factory piping package and the
crossover piping is achieved using
a flex hose. Trane provides the
hoses if factory piping package(s)
are selected. Expansion compen-
sation for the crossover piping
must be handled external to the
unit ventilator. See Figure 23
for 2-pipe crossover
piping.
UV-PRC001-EN