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Piping Installation
Before installation of piping package,
the shipping bracket holding the pip-
ing in place, must be removed.
Proper installation of piping is neces-
sary to provide efficient coil operation
and to prevent damage during opera-
tion. Follow standard piping practices
and include all accessories as neces-
sary.
Piping connection knockouts are
shown pages 8 to 10. Field connection
types and sizes for unit coils are listed
in Table 5. These sizes are provided for
field piping connection.
A 7/8'' OD condensate drain connec-
tion is provided on the chilled water
supply end of the unit.
1
Attach a flexible condensate drain
hose over the drain pan connec-
tion and secure with a hose clamp.
The drain pan on the vertical is vacu-
um molded with a drain connection
and P-Trap on the cooling coil, connec-
tion side.
Note: Condensate removal to the main
system should be made through the
bottom of the unit ventilator. If other
location for condensate removal is de-
sired, a specific field cut-out for the
connection should be made in the back
of the unit ventilator. To help avoid
cold air infiltration, the field cut-out
should only be large enough to allow
for the condensate hose to exit the
unit.
To field reverse the slope of a vertical
unit drain pan.
2
Slide out fan deck (disconnecting
the condensate line and fan plug
will release fan deck for sliding).
3
Remove pipe clamp that hold the
p-trap to the drain pan.
4
Remove clips that hold the drain
pan in-place.
5
Lift and rotate the drain pan.
6
Reconnect p-trap to the drain pan
and replace clips to secure the pan
to the fan deck.
18
Installation
7
After the condensate drain piping
has been completed, check water
flow to ensure the system proper-
ly carries and away all condensate
accumulation.
Note: A P-trap is factory supplied in ev-
ery vertical unit ventilator.
Trane Piping Packages (Option)
Trane Standard Piping Package in-
cludes a 2-way or 3-way valve with by-
pass balance valve, ball valves, Pete's
plugs and unions. A strainer and cir-
cuit balancing valve are optional.
1
All union connections should be
tightened in the field. Units are
shipped with union connections
hand tightened only in the factory.
Note: All connections made in the field
should be sweat connections.
Piping packages are not shipped insu-
lated. Any insulation should be provid-
ed in the field by the installing
contractor.
The auxiliary drain pan (optional) is
the main condensate connection to
the unit when specified. The chilled
water or DX coil drain pan will empty
into the auxiliary drain pan if a factory
installed, auxiliary pan is ordered. All
field piping condensate connections
should be made at the auxiliary drain
pan.
T
able 7: Coil data for field piping
Coil Type
4-Pipe Chilled Water/Hot Water
2-Pipe Changeover Coil
Hot Water Only
Steam
Chilled Water/Electric Heat
Chilled Water/Steam
DX
DX/Hot Water
DX/Steam
DX/Electric Heat
Electric Heat
Notes:
1. Supply and return connections are located on the same end of each coil.
2. All Trane piping packages have union connections; all units with piping packages by others have sweat
connections.
3. Coil connections are sweat except steam coils, which are threaded.
Installation Crossover Piping
Crossover piping is available for all hy-
dronic coils. It is either 1 3/8'' \[34.9\] or
2 1/8'' \[54\] in diameter (O.D.) as spec-
ified by the customer. Crossover pip-
ing can be found in either the left or
right hand end pocket. See crossover
submittal drawings page 13 for dimen-
sional data.
On 4-pipe coils, crossover piping con-
nects to the main cooling coil.
Factory insulation is provided on all
crossover piping.
When a Trane piping package is or-
dered, it is installed with the connec-
tions made to the supply and return of
both the coil and the crossover piping.
However, supply and return connec-
tions must be made in the field when a
piping package is furnished by the in-
staller.
The crossover piping is located at the
back of the unit along the wall and the
ends of the piping are flush with the
end of the unit.
Expansion compensation between the
piping package and the crossover pip-
ing is achieved using flex hoses rated
at 250 psi working pressure. Expan-
sion compensation for the crossover
piping must be handled external to the
unit ventilator.
Connection Location
Left or Right (opposite ends)
Left or Right
Left or Right
Left or Right
Left Cooling
Left or Right
Left
Left Cooling/Right Heating
7/8" Suction, 3/8" Discharge/5/8" OD
Left Cooling/Right Heating
7/8" Suction, 3/8" Discharge/1" MPT
Left Cooling/Right Heating
Right
Field Connection Size
7/8" OD/5/8" OD
7/8" OD
7/8" OD
1" MPT
7/8" OD
7/8" OD/1" MPT
7/8" Suction, 3/8" Discharge
7/8" Suction, 3/8" Discharge/NA
NA
UV-SVN03D-EN
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